Add m-esr52 at 52.6.0

28 files changed, 8668 insertions, 0 deletions

diff --git a/gfx/angle/src/compiler/preprocessor/64bit-tokenizer-safety.patch b/gfx/angle/src/compiler/preprocessor/64bit-tokenizer-safety.patch
new file mode 100755
index 000000000..912520c74
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/64bit-tokenizer-safety.patch
@@ -0,0 +1,79 @@
+diff --git a/src/compiler/preprocessor/Tokenizer.cpp b/src/compiler/preprocessor/Tokenizer.cpp
+index 0d7ad58..5ef0e5e 100644
+--- a/src/compiler/preprocessor/Tokenizer.cpp
++++ b/src/compiler/preprocessor/Tokenizer.cpp
+@@ -1703,7 +1703,7 @@ static int yy_get_next_buffer (yyscan_t yyscanner)
+ 	else
+ 		{
+ 			int num_to_read =
+-			YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move - 1;
++			static_cast<int>(YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move - 1);
+ 
+ 		while ( num_to_read <= 0 )
+ 			{ /* Not enough room in the buffer - grow it. */
+@@ -1737,8 +1737,8 @@ static int yy_get_next_buffer (yyscan_t yyscanner)
+ 
+ 			yyg->yy_c_buf_p = &b->yy_ch_buf[yy_c_buf_p_offset];
+ 
+-			num_to_read = YY_CURRENT_BUFFER_LVALUE->yy_buf_size -
+-						number_to_move - 1;
++			num_to_read = static_cast<int>(YY_CURRENT_BUFFER_LVALUE->yy_buf_size -
++						number_to_move - 1);
+ 
+ 			}
+ 
+@@ -1746,8 +1746,10 @@ static int yy_get_next_buffer (yyscan_t yyscanner)
+ 			num_to_read = YY_READ_BUF_SIZE;
+ 
+ 		/* Read in more data. */
++		yy_size_t ret = 0;
+ 		YY_INPUT( (&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move]),
+-			yyg->yy_n_chars, num_to_read );
++			ret, num_to_read );
++		yyg->yy_n_chars = static_cast<int>(ret);
+ 
+ 		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars;
+ 		}
+@@ -1773,13 +1775,13 @@ static int yy_get_next_buffer (yyscan_t yyscanner)
+ 
+ 	if ((int) (yyg->yy_n_chars + number_to_move) > YY_CURRENT_BUFFER_LVALUE->yy_buf_size) {
+ 		/* Extend the array by 50%, plus the number we really need. */
+-		int new_size = yyg->yy_n_chars + number_to_move + (yyg->yy_n_chars >> 1);
++		yy_size_t new_size = yyg->yy_n_chars + number_to_move + (yyg->yy_n_chars >> 1);
+ 		YY_CURRENT_BUFFER_LVALUE->yy_ch_buf = (char *) pprealloc((void *) YY_CURRENT_BUFFER_LVALUE->yy_ch_buf,new_size ,yyscanner );
+ 		if ( ! YY_CURRENT_BUFFER_LVALUE->yy_ch_buf )
+ 			YY_FATAL_ERROR( "out of dynamic memory in yy_get_next_buffer()" );
+ 	}
+ 
+-	yyg->yy_n_chars += number_to_move;
++	yyg->yy_n_chars += static_cast<int>(number_to_move);
+ 	YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars] = YY_END_OF_BUFFER_CHAR;
+ 	YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars + 1] = YY_END_OF_BUFFER_CHAR;
+ 
+@@ -2171,7 +2173,7 @@ void pppop_buffer_state (yyscan_t yyscanner)
+  */
+ static void ppensure_buffer_stack (yyscan_t yyscanner)
+ {
+-	int num_to_alloc;
++	yy_size_t num_to_alloc;
+     struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+ 
+ 	if (!yyg->yy_buffer_stack) {
+@@ -2238,7 +2240,7 @@ YY_BUFFER_STATE pp_scan_buffer  (char * base, yy_size_t  size , yyscan_t yyscann
+ 	if ( ! b )
+ 		YY_FATAL_ERROR( "out of dynamic memory in pp_scan_buffer()" );
+ 
+-	b->yy_buf_size = size - 2;	/* "- 2" to take care of EOB's */
++	b->yy_buf_size = static_cast<int>(size - 2);	/* "- 2" to take care of EOB's */
+ 	b->yy_buf_pos = b->yy_ch_buf = base;
+ 	b->yy_is_our_buffer = 0;
+ 	b->yy_input_file = NULL;
+@@ -2293,7 +2295,7 @@ YY_BUFFER_STATE pp_scan_bytes  (yyconst char * yybytes, int  _yybytes_len , yysc
+ 	if ( ! buf )
+ 		YY_FATAL_ERROR( "out of dynamic memory in pp_scan_bytes()" );
+ 
+-	for ( i = 0; i < _yybytes_len; ++i )
++	for ( i = 0; i < static_cast<yy_size_t>(_yybytes_len); ++i )
+ 		buf[i] = yybytes[i];
+ 
+ 	buf[_yybytes_len] = buf[_yybytes_len+1] = YY_END_OF_BUFFER_CHAR;
diff --git a/gfx/angle/src/compiler/preprocessor/DiagnosticsBase.cpp b/gfx/angle/src/compiler/preprocessor/DiagnosticsBase.cpp
new file mode 100755
index 000000000..fcb24e4e8
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/DiagnosticsBase.cpp
@@ -0,0 +1,141 @@
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "compiler/preprocessor/DiagnosticsBase.h"
+
+#include "common/debug.h"
+
+namespace pp
+{
+
+Diagnostics::~Diagnostics()
+{
+}
+
+void Diagnostics::report(ID id,
+                         const SourceLocation &loc,
+                         const std::string &text)
+{
+    // TODO(alokp): Keep a count of errors and warnings.
+    print(id, loc, text);
+}
+
+Diagnostics::Severity Diagnostics::severity(ID id)
+{
+    if ((id > PP_ERROR_BEGIN) && (id < PP_ERROR_END))
+        return PP_ERROR;
+
+    if ((id > PP_WARNING_BEGIN) && (id < PP_WARNING_END))
+        return PP_WARNING;
+
+    UNREACHABLE();
+    return PP_ERROR;
+}
+
+std::string Diagnostics::message(ID id)
+{
+    switch (id)
+    {
+      // Errors begin.
+      case PP_INTERNAL_ERROR:
+        return "internal error";
+      case PP_OUT_OF_MEMORY:
+        return "out of memory";
+      case PP_INVALID_CHARACTER:
+        return "invalid character";
+      case PP_INVALID_NUMBER:
+        return "invalid number";
+      case PP_INTEGER_OVERFLOW:
+        return "integer overflow";
+      case PP_FLOAT_OVERFLOW:
+        return "float overflow";
+      case PP_TOKEN_TOO_LONG:
+        return "token too long";
+      case PP_INVALID_EXPRESSION:
+        return "invalid expression";
+      case PP_DIVISION_BY_ZERO:
+        return "division by zero";
+      case PP_EOF_IN_COMMENT:
+        return "unexpected end of file found in comment";
+      case PP_UNEXPECTED_TOKEN:
+        return "unexpected token";
+      case PP_DIRECTIVE_INVALID_NAME:
+        return "invalid directive name";
+      case PP_MACRO_NAME_RESERVED:
+        return "macro name is reserved";
+      case PP_MACRO_REDEFINED:
+        return "macro redefined";
+      case PP_MACRO_PREDEFINED_REDEFINED:
+        return "predefined macro redefined";
+      case PP_MACRO_PREDEFINED_UNDEFINED:
+        return "predefined macro undefined";
+      case PP_MACRO_UNTERMINATED_INVOCATION:
+        return "unterminated macro invocation";
+      case PP_MACRO_UNDEFINED_WHILE_INVOKED:
+          return "macro undefined while being invoked";
+      case PP_MACRO_TOO_FEW_ARGS:
+        return "Not enough arguments for macro";
+      case PP_MACRO_TOO_MANY_ARGS:
+        return "Too many arguments for macro";
+      case PP_MACRO_DUPLICATE_PARAMETER_NAMES:
+        return "duplicate macro parameter name";
+      case PP_CONDITIONAL_ENDIF_WITHOUT_IF:
+        return "unexpected #endif found without a matching #if";
+      case PP_CONDITIONAL_ELSE_WITHOUT_IF:
+        return "unexpected #else found without a matching #if";
+      case PP_CONDITIONAL_ELSE_AFTER_ELSE:
+        return "unexpected #else found after another #else";
+      case PP_CONDITIONAL_ELIF_WITHOUT_IF:
+        return "unexpected #elif found without a matching #if";
+      case PP_CONDITIONAL_ELIF_AFTER_ELSE:
+        return "unexpected #elif found after #else";
+      case PP_CONDITIONAL_UNTERMINATED:
+        return "unexpected end of file found in conditional block";
+      case PP_INVALID_EXTENSION_NAME:
+        return "invalid extension name";
+      case PP_INVALID_EXTENSION_BEHAVIOR:
+        return "invalid extension behavior";
+      case PP_INVALID_EXTENSION_DIRECTIVE:
+        return "invalid extension directive";
+      case PP_INVALID_VERSION_NUMBER:
+        return "invalid version number";
+      case PP_INVALID_VERSION_DIRECTIVE:
+        return "invalid version directive";
+      case PP_VERSION_NOT_FIRST_STATEMENT:
+        return "#version directive must occur before anything else, "
+               "except for comments and white space";
+      case PP_VERSION_NOT_FIRST_LINE_ESSL3:
+        return "#version directive must occur on the first line of the shader";
+      case PP_INVALID_LINE_NUMBER:
+        return "invalid line number";
+      case PP_INVALID_FILE_NUMBER:
+        return "invalid file number";
+      case PP_INVALID_LINE_DIRECTIVE:
+        return "invalid line directive";
+      case PP_NON_PP_TOKEN_BEFORE_EXTENSION_ESSL3:
+        return "extension directive must occur before any non-preprocessor tokens in ESSL3";
+      case PP_UNDEFINED_SHIFT:
+          return "shift exponent is negative or undefined";
+      // Errors end.
+      // Warnings begin.
+      case PP_EOF_IN_DIRECTIVE:
+        return "unexpected end of file found in directive";
+      case PP_CONDITIONAL_UNEXPECTED_TOKEN:
+        return "unexpected token after conditional expression";
+      case PP_UNRECOGNIZED_PRAGMA:
+        return "unrecognized pragma";
+      case PP_NON_PP_TOKEN_BEFORE_EXTENSION_ESSL1:
+        return "extension directive should occur before any non-preprocessor tokens";
+      case PP_WARNING_MACRO_NAME_RESERVED:
+        return "macro name with a double underscore is reserved - unintented behavior is possible";
+      // Warnings end.
+      default:
+          UNREACHABLE();
+          return "";
+    }
+}
+
+}  // namespace pp
diff --git a/gfx/angle/src/compiler/preprocessor/DiagnosticsBase.h b/gfx/angle/src/compiler/preprocessor/DiagnosticsBase.h
new file mode 100755
index 000000000..6c3fe9ee9
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/DiagnosticsBase.h
@@ -0,0 +1,95 @@
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_PREPROCESSOR_DIAGNOSTICSBASE_H_
+#define COMPILER_PREPROCESSOR_DIAGNOSTICSBASE_H_
+
+#include <string>
+
+namespace pp
+{
+
+struct SourceLocation;
+
+// Base class for reporting diagnostic messages.
+// Derived classes are responsible for formatting and printing the messages.
+class Diagnostics
+{
+  public:
+    enum Severity
+    {
+        PP_ERROR,
+        PP_WARNING
+    };
+    enum ID
+    {
+        PP_ERROR_BEGIN,
+        PP_INTERNAL_ERROR,
+        PP_OUT_OF_MEMORY,
+        PP_INVALID_CHARACTER,
+        PP_INVALID_NUMBER,
+        PP_INTEGER_OVERFLOW,
+        PP_FLOAT_OVERFLOW,
+        PP_TOKEN_TOO_LONG,
+        PP_INVALID_EXPRESSION,
+        PP_DIVISION_BY_ZERO,
+        PP_EOF_IN_COMMENT,
+        PP_UNEXPECTED_TOKEN,
+        PP_DIRECTIVE_INVALID_NAME,
+        PP_MACRO_NAME_RESERVED,
+        PP_MACRO_REDEFINED,
+        PP_MACRO_PREDEFINED_REDEFINED,
+        PP_MACRO_PREDEFINED_UNDEFINED,
+        PP_MACRO_UNTERMINATED_INVOCATION,
+        PP_MACRO_UNDEFINED_WHILE_INVOKED,
+        PP_MACRO_TOO_FEW_ARGS,
+        PP_MACRO_TOO_MANY_ARGS,
+        PP_MACRO_DUPLICATE_PARAMETER_NAMES,
+        PP_CONDITIONAL_ENDIF_WITHOUT_IF,
+        PP_CONDITIONAL_ELSE_WITHOUT_IF,
+        PP_CONDITIONAL_ELSE_AFTER_ELSE,
+        PP_CONDITIONAL_ELIF_WITHOUT_IF,
+        PP_CONDITIONAL_ELIF_AFTER_ELSE,
+        PP_CONDITIONAL_UNTERMINATED,
+        PP_CONDITIONAL_UNEXPECTED_TOKEN,
+        PP_INVALID_EXTENSION_NAME,
+        PP_INVALID_EXTENSION_BEHAVIOR,
+        PP_INVALID_EXTENSION_DIRECTIVE,
+        PP_INVALID_VERSION_NUMBER,
+        PP_INVALID_VERSION_DIRECTIVE,
+        PP_VERSION_NOT_FIRST_STATEMENT,
+        PP_VERSION_NOT_FIRST_LINE_ESSL3,
+        PP_INVALID_LINE_NUMBER,
+        PP_INVALID_FILE_NUMBER,
+        PP_INVALID_LINE_DIRECTIVE,
+        PP_NON_PP_TOKEN_BEFORE_EXTENSION_ESSL3,
+        PP_UNDEFINED_SHIFT,
+        PP_ERROR_END,
+
+        PP_WARNING_BEGIN,
+        PP_EOF_IN_DIRECTIVE,
+        PP_UNRECOGNIZED_PRAGMA,
+        PP_NON_PP_TOKEN_BEFORE_EXTENSION_ESSL1,
+        PP_WARNING_MACRO_NAME_RESERVED,
+        PP_WARNING_END
+    };
+
+    virtual ~Diagnostics();
+
+    void report(ID id, const SourceLocation &loc, const std::string &text);
+
+  protected:
+    Severity severity(ID id);
+    std::string message(ID id);
+
+    virtual void print(ID id,
+                       const SourceLocation &loc,
+                       const std::string &text) = 0;
+};
+
+}  // namespace pp
+
+#endif  // COMPILER_PREPROCESSOR_DIAGNOSTICSBASE_H_
diff --git a/gfx/angle/src/compiler/preprocessor/DirectiveHandlerBase.cpp b/gfx/angle/src/compiler/preprocessor/DirectiveHandlerBase.cpp
new file mode 100755
index 000000000..049dae907
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/DirectiveHandlerBase.cpp
@@ -0,0 +1,16 @@
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "compiler/preprocessor/DirectiveHandlerBase.h"
+
+namespace pp
+{
+
+DirectiveHandler::~DirectiveHandler()
+{
+}
+
+}  // namespace pp
diff --git a/gfx/angle/src/compiler/preprocessor/DirectiveHandlerBase.h b/gfx/angle/src/compiler/preprocessor/DirectiveHandlerBase.h
new file mode 100755
index 000000000..cf6789576
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/DirectiveHandlerBase.h
@@ -0,0 +1,45 @@
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_PREPROCESSOR_DIRECTIVEHANDLERBASE_H_
+#define COMPILER_PREPROCESSOR_DIRECTIVEHANDLERBASE_H_
+
+#include <string>
+
+namespace pp
+{
+
+struct SourceLocation;
+
+// Base class for handling directives.
+// Preprocessor uses this class to notify the clients about certain
+// preprocessor directives. Derived classes are responsible for
+// handling them in an appropriate manner.
+class DirectiveHandler
+{
+  public:
+    virtual ~DirectiveHandler();
+
+    virtual void handleError(const SourceLocation &loc,
+                             const std::string &msg) = 0;
+
+    // Handle pragma of form: #pragma name[(value)]
+    virtual void handlePragma(const SourceLocation &loc,
+                              const std::string &name,
+                              const std::string &value,
+                              bool stdgl) = 0;
+
+    virtual void handleExtension(const SourceLocation &loc,
+                                 const std::string &name,
+                                 const std::string &behavior) = 0;
+
+    virtual void handleVersion(const SourceLocation &loc,
+                               int version) = 0;
+};
+
+}  // namespace pp
+
+#endif  // COMPILER_PREPROCESSOR_DIRECTIVEHANDLERBASE_H_
diff --git a/gfx/angle/src/compiler/preprocessor/DirectiveParser.cpp b/gfx/angle/src/compiler/preprocessor/DirectiveParser.cpp
new file mode 100755
index 000000000..643f73bd9
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/DirectiveParser.cpp
@@ -0,0 +1,1004 @@
+//
+// Copyright (c) 2011-2013 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "compiler/preprocessor/DirectiveParser.h"
+
+#include <algorithm>
+#include <cstdlib>
+#include <sstream>
+
+#include "common/debug.h"
+#include "compiler/preprocessor/DiagnosticsBase.h"
+#include "compiler/preprocessor/DirectiveHandlerBase.h"
+#include "compiler/preprocessor/ExpressionParser.h"
+#include "compiler/preprocessor/MacroExpander.h"
+#include "compiler/preprocessor/Token.h"
+#include "compiler/preprocessor/Tokenizer.h"
+
+namespace {
+enum DirectiveType
+{
+    DIRECTIVE_NONE,
+    DIRECTIVE_DEFINE,
+    DIRECTIVE_UNDEF,
+    DIRECTIVE_IF,
+    DIRECTIVE_IFDEF,
+    DIRECTIVE_IFNDEF,
+    DIRECTIVE_ELSE,
+    DIRECTIVE_ELIF,
+    DIRECTIVE_ENDIF,
+    DIRECTIVE_ERROR,
+    DIRECTIVE_PRAGMA,
+    DIRECTIVE_EXTENSION,
+    DIRECTIVE_VERSION,
+    DIRECTIVE_LINE
+};
+
+DirectiveType getDirective(const pp::Token *token)
+{
+    const char kDirectiveDefine[] = "define";
+    const char kDirectiveUndef[] = "undef";
+    const char kDirectiveIf[] = "if";
+    const char kDirectiveIfdef[] = "ifdef";
+    const char kDirectiveIfndef[] = "ifndef";
+    const char kDirectiveElse[] = "else";
+    const char kDirectiveElif[] = "elif";
+    const char kDirectiveEndif[] = "endif";
+    const char kDirectiveError[] = "error";
+    const char kDirectivePragma[] = "pragma";
+    const char kDirectiveExtension[] = "extension";
+    const char kDirectiveVersion[] = "version";
+    const char kDirectiveLine[] = "line";
+
+    if (token->type != pp::Token::IDENTIFIER)
+        return DIRECTIVE_NONE;
+
+    if (token->text == kDirectiveDefine)
+        return DIRECTIVE_DEFINE;
+    if (token->text == kDirectiveUndef)
+        return DIRECTIVE_UNDEF;
+    if (token->text == kDirectiveIf)
+        return DIRECTIVE_IF;
+    if (token->text == kDirectiveIfdef)
+        return DIRECTIVE_IFDEF;
+    if (token->text == kDirectiveIfndef)
+        return DIRECTIVE_IFNDEF;
+    if (token->text == kDirectiveElse)
+        return DIRECTIVE_ELSE;
+    if (token->text == kDirectiveElif)
+        return DIRECTIVE_ELIF;
+    if (token->text == kDirectiveEndif)
+        return DIRECTIVE_ENDIF;
+    if (token->text == kDirectiveError)
+        return DIRECTIVE_ERROR;
+    if (token->text == kDirectivePragma)
+        return DIRECTIVE_PRAGMA;
+    if (token->text == kDirectiveExtension)
+        return DIRECTIVE_EXTENSION;
+    if (token->text == kDirectiveVersion)
+        return DIRECTIVE_VERSION;
+    if (token->text == kDirectiveLine)
+        return DIRECTIVE_LINE;
+
+    return DIRECTIVE_NONE;
+}
+
+bool isConditionalDirective(DirectiveType directive)
+{
+    switch (directive)
+    {
+      case DIRECTIVE_IF:
+      case DIRECTIVE_IFDEF:
+      case DIRECTIVE_IFNDEF:
+      case DIRECTIVE_ELSE:
+      case DIRECTIVE_ELIF:
+      case DIRECTIVE_ENDIF:
+        return true;
+      default:
+        return false;
+    }
+}
+
+// Returns true if the token represents End Of Directive.
+bool isEOD(const pp::Token *token)
+{
+    return (token->type == '\n') || (token->type == pp::Token::LAST);
+}
+
+void skipUntilEOD(pp::Lexer *lexer, pp::Token *token)
+{
+    while(!isEOD(token))
+    {
+        lexer->lex(token);
+    }
+}
+
+bool isMacroNameReserved(const std::string &name)
+{
+    // Names prefixed with "GL_" and the name "defined" are reserved.
+    return name == "defined" || (name.substr(0, 3) == "GL_");
+}
+
+bool hasDoubleUnderscores(const std::string &name)
+{
+    return (name.find("__") != std::string::npos);
+}
+
+bool isMacroPredefined(const std::string &name,
+                       const pp::MacroSet &macroSet)
+{
+    pp::MacroSet::const_iterator iter = macroSet.find(name);
+    return iter != macroSet.end() ? iter->second.predefined : false;
+}
+
+}  // namespace anonymous
+
+namespace pp
+{
+
+class DefinedParser : public Lexer
+{
+  public:
+    DefinedParser(Lexer *lexer, const MacroSet *macroSet, Diagnostics *diagnostics)
+        : mLexer(lexer), mMacroSet(macroSet), mDiagnostics(diagnostics)
+    {
+    }
+
+  protected:
+    void lex(Token *token) override
+    {
+        const char kDefined[] = "defined";
+
+        mLexer->lex(token);
+        if (token->type != Token::IDENTIFIER)
+            return;
+        if (token->text != kDefined)
+            return;
+
+        bool paren = false;
+        mLexer->lex(token);
+        if (token->type == '(')
+        {
+            paren = true;
+            mLexer->lex(token);
+        }
+
+        if (token->type != Token::IDENTIFIER)
+        {
+            mDiagnostics->report(Diagnostics::PP_UNEXPECTED_TOKEN, token->location, token->text);
+            skipUntilEOD(mLexer, token);
+            return;
+        }
+        MacroSet::const_iterator iter = mMacroSet->find(token->text);
+        std::string expression        = iter != mMacroSet->end() ? "1" : "0";
+
+        if (paren)
+        {
+            mLexer->lex(token);
+            if (token->type != ')')
+            {
+                mDiagnostics->report(Diagnostics::PP_UNEXPECTED_TOKEN, token->location,
+                                     token->text);
+                skipUntilEOD(mLexer, token);
+                return;
+            }
+        }
+
+        // We have a valid defined operator.
+        // Convert the current token into a CONST_INT token.
+        token->type = Token::CONST_INT;
+        token->text = expression;
+    }
+
+  private:
+    Lexer *mLexer;
+    const MacroSet *mMacroSet;
+    Diagnostics *mDiagnostics;
+};
+
+DirectiveParser::DirectiveParser(Tokenizer *tokenizer,
+                                 MacroSet *macroSet,
+                                 Diagnostics *diagnostics,
+                                 DirectiveHandler *directiveHandler)
+    : mPastFirstStatement(false),
+      mSeenNonPreprocessorToken(false),
+      mTokenizer(tokenizer),
+      mMacroSet(macroSet),
+      mDiagnostics(diagnostics),
+      mDirectiveHandler(directiveHandler),
+      mShaderVersion(100)
+{
+}
+
+void DirectiveParser::lex(Token *token)
+{
+    do
+    {
+        mTokenizer->lex(token);
+
+        if (token->type == Token::PP_HASH)
+        {
+            parseDirective(token);
+            mPastFirstStatement = true;
+        }
+        else if (!isEOD(token))
+        {
+            mSeenNonPreprocessorToken = true;
+        }
+
+        if (token->type == Token::LAST)
+        {
+            if (!mConditionalStack.empty())
+            {
+                const ConditionalBlock &block = mConditionalStack.back();
+                mDiagnostics->report(Diagnostics::PP_CONDITIONAL_UNTERMINATED,
+                                     block.location, block.type);
+            }
+            break;
+        }
+
+    }
+    while (skipping() || (token->type == '\n'));
+
+    mPastFirstStatement = true;
+}
+
+void DirectiveParser::parseDirective(Token *token)
+{
+    ASSERT(token->type == Token::PP_HASH);
+
+    mTokenizer->lex(token);
+    if (isEOD(token))
+    {
+        // Empty Directive.
+        return;
+    }
+
+    DirectiveType directive = getDirective(token);
+
+    // While in an excluded conditional block/group,
+    // we only parse conditional directives.
+    if (skipping() && !isConditionalDirective(directive))
+    {
+        skipUntilEOD(mTokenizer, token);
+        return;
+    }
+
+    switch(directive)
+    {
+      case DIRECTIVE_NONE:
+        mDiagnostics->report(Diagnostics::PP_DIRECTIVE_INVALID_NAME,
+                             token->location, token->text);
+        skipUntilEOD(mTokenizer, token);
+        break;
+      case DIRECTIVE_DEFINE:
+        parseDefine(token);
+        break;
+      case DIRECTIVE_UNDEF:
+        parseUndef(token);
+        break;
+      case DIRECTIVE_IF:
+        parseIf(token);
+        break;
+      case DIRECTIVE_IFDEF:
+        parseIfdef(token);
+        break;
+      case DIRECTIVE_IFNDEF:
+        parseIfndef(token);
+        break;
+      case DIRECTIVE_ELSE:
+        parseElse(token);
+        break;
+      case DIRECTIVE_ELIF:
+        parseElif(token);
+        break;
+      case DIRECTIVE_ENDIF:
+        parseEndif(token);
+        break;
+      case DIRECTIVE_ERROR:
+        parseError(token);
+        break;
+      case DIRECTIVE_PRAGMA:
+        parsePragma(token);
+        break;
+      case DIRECTIVE_EXTENSION:
+        parseExtension(token);
+        break;
+      case DIRECTIVE_VERSION:
+        parseVersion(token);
+        break;
+      case DIRECTIVE_LINE:
+        parseLine(token);
+        break;
+      default:
+          UNREACHABLE();
+          break;
+    }
+
+    skipUntilEOD(mTokenizer, token);
+    if (token->type == Token::LAST)
+    {
+        mDiagnostics->report(Diagnostics::PP_EOF_IN_DIRECTIVE,
+                             token->location, token->text);
+    }
+}
+
+void DirectiveParser::parseDefine(Token *token)
+{
+    ASSERT(getDirective(token) == DIRECTIVE_DEFINE);
+
+    mTokenizer->lex(token);
+    if (token->type != Token::IDENTIFIER)
+    {
+        mDiagnostics->report(Diagnostics::PP_UNEXPECTED_TOKEN,
+                             token->location, token->text);
+        return;
+    }
+    if (isMacroPredefined(token->text, *mMacroSet))
+    {
+        mDiagnostics->report(Diagnostics::PP_MACRO_PREDEFINED_REDEFINED,
+                             token->location, token->text);
+        return;
+    }
+    if (isMacroNameReserved(token->text))
+    {
+        mDiagnostics->report(Diagnostics::PP_MACRO_NAME_RESERVED,
+                             token->location, token->text);
+        return;
+    }
+    // Using double underscores is allowed, but may result in unintended
+    // behavior, so a warning is issued. At the time of writing this was
+    // specified in ESSL 3.10, but the intent judging from Khronos
+    // discussions and dEQP tests was that double underscores should be
+    // allowed in earlier ESSL versions too.
+    if (hasDoubleUnderscores(token->text))
+    {
+        mDiagnostics->report(Diagnostics::PP_WARNING_MACRO_NAME_RESERVED, token->location,
+                             token->text);
+    }
+
+    Macro macro;
+    macro.type = Macro::kTypeObj;
+    macro.name = token->text;
+
+    mTokenizer->lex(token);
+    if (token->type == '(' && !token->hasLeadingSpace())
+    {
+        // Function-like macro. Collect arguments.
+        macro.type = Macro::kTypeFunc;
+        do
+        {
+            mTokenizer->lex(token);
+            if (token->type != Token::IDENTIFIER)
+                break;
+
+            if (std::find(macro.parameters.begin(), macro.parameters.end(), token->text) != macro.parameters.end())
+            {
+                mDiagnostics->report(Diagnostics::PP_MACRO_DUPLICATE_PARAMETER_NAMES,
+                                     token->location, token->text);
+                return;
+            }
+
+            macro.parameters.push_back(token->text);
+
+            mTokenizer->lex(token);  // Get ','.
+        }
+        while (token->type == ',');
+
+        if (token->type != ')')
+        {
+            mDiagnostics->report(Diagnostics::PP_UNEXPECTED_TOKEN,
+                                 token->location,
+                                 token->text);
+            return;
+        }
+        mTokenizer->lex(token);  // Get ')'.
+    }
+
+    while ((token->type != '\n') && (token->type != Token::LAST))
+    {
+        // Reset the token location because it is unnecessary in replacement
+        // list. Resetting it also allows us to reuse Token::equals() to
+        // compare macros.
+        token->location = SourceLocation();
+        macro.replacements.push_back(*token);
+        mTokenizer->lex(token);
+    }
+    if (!macro.replacements.empty())
+    {
+        // Whitespace preceding the replacement list is not considered part of
+        // the replacement list for either form of macro.
+        macro.replacements.front().setHasLeadingSpace(false);
+    }
+
+    // Check for macro redefinition.
+    MacroSet::const_iterator iter = mMacroSet->find(macro.name);
+    if (iter != mMacroSet->end() && !macro.equals(iter->second))
+    {
+        mDiagnostics->report(Diagnostics::PP_MACRO_REDEFINED,
+                             token->location,
+                             macro.name);
+        return;
+    }
+    mMacroSet->insert(std::make_pair(macro.name, macro));
+}
+
+void DirectiveParser::parseUndef(Token *token)
+{
+    ASSERT(getDirective(token) == DIRECTIVE_UNDEF);
+
+    mTokenizer->lex(token);
+    if (token->type != Token::IDENTIFIER)
+    {
+        mDiagnostics->report(Diagnostics::PP_UNEXPECTED_TOKEN,
+                             token->location, token->text);
+        return;
+    }
+
+    MacroSet::iterator iter = mMacroSet->find(token->text);
+    if (iter != mMacroSet->end())
+    {
+        if (iter->second.predefined)
+        {
+            mDiagnostics->report(Diagnostics::PP_MACRO_PREDEFINED_UNDEFINED,
+                                 token->location, token->text);
+            return;
+        }
+        else if (iter->second.expansionCount > 0)
+        {
+            mDiagnostics->report(Diagnostics::PP_MACRO_UNDEFINED_WHILE_INVOKED, token->location,
+                                 token->text);
+            return;
+        }
+        else
+        {
+            mMacroSet->erase(iter);
+        }
+    }
+
+    mTokenizer->lex(token);
+    if (!isEOD(token))
+    {
+        mDiagnostics->report(Diagnostics::PP_UNEXPECTED_TOKEN,
+                             token->location, token->text);
+        skipUntilEOD(mTokenizer, token);
+    }
+}
+
+void DirectiveParser::parseIf(Token *token)
+{
+    ASSERT(getDirective(token) == DIRECTIVE_IF);
+    parseConditionalIf(token);
+}
+
+void DirectiveParser::parseIfdef(Token *token)
+{
+    ASSERT(getDirective(token) == DIRECTIVE_IFDEF);
+    parseConditionalIf(token);
+}
+
+void DirectiveParser::parseIfndef(Token *token)
+{
+    ASSERT(getDirective(token) == DIRECTIVE_IFNDEF);
+    parseConditionalIf(token);
+}
+
+void DirectiveParser::parseElse(Token *token)
+{
+    ASSERT(getDirective(token) == DIRECTIVE_ELSE);
+
+    if (mConditionalStack.empty())
+    {
+        mDiagnostics->report(Diagnostics::PP_CONDITIONAL_ELSE_WITHOUT_IF,
+                             token->location, token->text);
+        skipUntilEOD(mTokenizer, token);
+        return;
+    }
+
+    ConditionalBlock &block = mConditionalStack.back();
+    if (block.skipBlock)
+    {
+        // No diagnostics. Just skip the whole line.
+        skipUntilEOD(mTokenizer, token);
+        return;
+    }
+    if (block.foundElseGroup)
+    {
+        mDiagnostics->report(Diagnostics::PP_CONDITIONAL_ELSE_AFTER_ELSE,
+                             token->location, token->text);
+        skipUntilEOD(mTokenizer, token);
+        return;
+    }
+
+    block.foundElseGroup = true;
+    block.skipGroup = block.foundValidGroup;
+    block.foundValidGroup = true;
+
+    // Check if there are extra tokens after #else.
+    mTokenizer->lex(token);
+    if (!isEOD(token))
+    {
+        mDiagnostics->report(Diagnostics::PP_CONDITIONAL_UNEXPECTED_TOKEN,
+                             token->location, token->text);
+        skipUntilEOD(mTokenizer, token);
+    }
+}
+
+void DirectiveParser::parseElif(Token *token)
+{
+    ASSERT(getDirective(token) == DIRECTIVE_ELIF);
+
+    if (mConditionalStack.empty())
+    {
+        mDiagnostics->report(Diagnostics::PP_CONDITIONAL_ELIF_WITHOUT_IF,
+                             token->location, token->text);
+        skipUntilEOD(mTokenizer, token);
+        return;
+    }
+
+    ConditionalBlock &block = mConditionalStack.back();
+    if (block.skipBlock)
+    {
+        // No diagnostics. Just skip the whole line.
+        skipUntilEOD(mTokenizer, token);
+        return;
+    }
+    if (block.foundElseGroup)
+    {
+        mDiagnostics->report(Diagnostics::PP_CONDITIONAL_ELIF_AFTER_ELSE,
+                             token->location, token->text);
+        skipUntilEOD(mTokenizer, token);
+        return;
+    }
+    if (block.foundValidGroup)
+    {
+        // Do not parse the expression.
+        // Also be careful not to emit a diagnostic.
+        block.skipGroup = true;
+        skipUntilEOD(mTokenizer, token);
+        return;
+    }
+
+    int expression = parseExpressionIf(token);
+    block.skipGroup = expression == 0;
+    block.foundValidGroup = expression != 0;
+}
+
+void DirectiveParser::parseEndif(Token *token)
+{
+    ASSERT(getDirective(token) == DIRECTIVE_ENDIF);
+
+    if (mConditionalStack.empty())
+    {
+        mDiagnostics->report(Diagnostics::PP_CONDITIONAL_ENDIF_WITHOUT_IF,
+                             token->location, token->text);
+        skipUntilEOD(mTokenizer, token);
+        return;
+    }
+
+    mConditionalStack.pop_back();
+
+    // Check if there are tokens after #endif.
+    mTokenizer->lex(token);
+    if (!isEOD(token))
+    {
+        mDiagnostics->report(Diagnostics::PP_CONDITIONAL_UNEXPECTED_TOKEN,
+                             token->location, token->text);
+        skipUntilEOD(mTokenizer, token);
+    }
+}
+
+void DirectiveParser::parseError(Token *token)
+{
+    ASSERT(getDirective(token) == DIRECTIVE_ERROR);
+
+    std::ostringstream stream;
+    mTokenizer->lex(token);
+    while ((token->type != '\n') && (token->type != Token::LAST))
+    {
+        stream << *token;
+        mTokenizer->lex(token);
+    }
+    mDirectiveHandler->handleError(token->location, stream.str());
+}
+
+// Parses pragma of form: #pragma name[(value)].
+void DirectiveParser::parsePragma(Token *token)
+{
+    ASSERT(getDirective(token) == DIRECTIVE_PRAGMA);
+
+    enum State
+    {
+        PRAGMA_NAME,
+        LEFT_PAREN,
+        PRAGMA_VALUE,
+        RIGHT_PAREN
+    };
+
+    bool valid = true;
+    std::string name, value;
+    int state = PRAGMA_NAME;
+
+    mTokenizer->lex(token);
+    bool stdgl = token->text == "STDGL";
+    if (stdgl)
+    {
+        mTokenizer->lex(token);
+    }
+    while ((token->type != '\n') && (token->type != Token::LAST))
+    {
+        switch(state++)
+        {
+          case PRAGMA_NAME:
+            name = token->text;
+            valid = valid && (token->type == Token::IDENTIFIER);
+            break;
+          case LEFT_PAREN:
+            valid = valid && (token->type == '(');
+            break;
+          case PRAGMA_VALUE:
+            value = token->text;
+            valid = valid && (token->type == Token::IDENTIFIER);
+            break;
+          case RIGHT_PAREN:
+            valid = valid && (token->type == ')');
+            break;
+          default:
+            valid = false;
+            break;
+        }
+        mTokenizer->lex(token);
+    }
+
+    valid = valid && ((state == PRAGMA_NAME) ||     // Empty pragma.
+                      (state == LEFT_PAREN) ||      // Without value.
+                      (state == RIGHT_PAREN + 1));  // With value.
+    if (!valid)
+    {
+        mDiagnostics->report(Diagnostics::PP_UNRECOGNIZED_PRAGMA,
+                             token->location, name);
+    }
+    else if (state > PRAGMA_NAME)  // Do not notify for empty pragma.
+    {
+        mDirectiveHandler->handlePragma(token->location, name, value, stdgl);
+    }
+}
+
+void DirectiveParser::parseExtension(Token *token)
+{
+    ASSERT(getDirective(token) == DIRECTIVE_EXTENSION);
+
+    enum State
+    {
+        EXT_NAME,
+        COLON,
+        EXT_BEHAVIOR
+    };
+
+    bool valid = true;
+    std::string name, behavior;
+    int state = EXT_NAME;
+
+    mTokenizer->lex(token);
+    while ((token->type != '\n') && (token->type != Token::LAST))
+    {
+        switch (state++)
+        {
+          case EXT_NAME:
+            if (valid && (token->type != Token::IDENTIFIER))
+            {
+                mDiagnostics->report(Diagnostics::PP_INVALID_EXTENSION_NAME,
+                                     token->location, token->text);
+                valid = false;
+            }
+            if (valid) name = token->text;
+            break;
+          case COLON:
+            if (valid && (token->type != ':'))
+            {
+                mDiagnostics->report(Diagnostics::PP_UNEXPECTED_TOKEN,
+                                     token->location, token->text);
+                valid = false;
+            }
+            break;
+          case EXT_BEHAVIOR:
+            if (valid && (token->type != Token::IDENTIFIER))
+            {
+                mDiagnostics->report(Diagnostics::PP_INVALID_EXTENSION_BEHAVIOR,
+                                     token->location, token->text);
+                valid = false;
+            }
+            if (valid) behavior = token->text;
+            break;
+          default:
+            if (valid)
+            {
+                mDiagnostics->report(Diagnostics::PP_UNEXPECTED_TOKEN,
+                                     token->location, token->text);
+                valid = false;
+            }
+            break;
+        }
+        mTokenizer->lex(token);
+    }
+    if (valid && (state != EXT_BEHAVIOR + 1))
+    {
+        mDiagnostics->report(Diagnostics::PP_INVALID_EXTENSION_DIRECTIVE,
+                             token->location, token->text);
+        valid = false;
+    }
+    if (valid && mSeenNonPreprocessorToken)
+    {
+        if (mShaderVersion >= 300)
+        {
+            mDiagnostics->report(Diagnostics::PP_NON_PP_TOKEN_BEFORE_EXTENSION_ESSL3,
+                                 token->location, token->text);
+            valid = false;
+        }
+        else
+        {
+            mDiagnostics->report(Diagnostics::PP_NON_PP_TOKEN_BEFORE_EXTENSION_ESSL1,
+                                 token->location, token->text);
+        }
+    }
+    if (valid)
+        mDirectiveHandler->handleExtension(token->location, name, behavior);
+}
+
+void DirectiveParser::parseVersion(Token *token)
+{
+    ASSERT(getDirective(token) == DIRECTIVE_VERSION);
+
+    if (mPastFirstStatement)
+    {
+        mDiagnostics->report(Diagnostics::PP_VERSION_NOT_FIRST_STATEMENT,
+                             token->location, token->text);
+        skipUntilEOD(mTokenizer, token);
+        return;
+    }
+
+    enum State
+    {
+        VERSION_NUMBER,
+        VERSION_PROFILE,
+        VERSION_ENDLINE
+    };
+
+    bool valid = true;
+    int version = 0;
+    int state = VERSION_NUMBER;
+
+    mTokenizer->lex(token);
+    while (valid && (token->type != '\n') && (token->type != Token::LAST))
+    {
+        switch (state)
+        {
+          case VERSION_NUMBER:
+            if (token->type != Token::CONST_INT)
+            {
+                mDiagnostics->report(Diagnostics::PP_INVALID_VERSION_NUMBER,
+                                     token->location, token->text);
+                valid = false;
+            }
+            if (valid && !token->iValue(&version))
+            {
+                mDiagnostics->report(Diagnostics::PP_INTEGER_OVERFLOW,
+                                     token->location, token->text);
+                valid = false;
+            }
+            if (valid)
+            {
+                state = (version < 300) ? VERSION_ENDLINE : VERSION_PROFILE;
+            }
+            break;
+          case VERSION_PROFILE:
+            if (token->type != Token::IDENTIFIER || token->text != "es")
+            {
+                mDiagnostics->report(Diagnostics::PP_INVALID_VERSION_DIRECTIVE,
+                                     token->location, token->text);
+                valid = false;
+            }
+            state = VERSION_ENDLINE;
+            break;
+          default:
+            mDiagnostics->report(Diagnostics::PP_UNEXPECTED_TOKEN,
+                                 token->location, token->text);
+            valid = false;
+            break;
+        }
+
+        mTokenizer->lex(token);
+    }
+
+    if (valid && (state != VERSION_ENDLINE))
+    {
+        mDiagnostics->report(Diagnostics::PP_INVALID_VERSION_DIRECTIVE,
+                             token->location, token->text);
+        valid = false;
+    }
+
+    if (valid && version >= 300 && token->location.line > 1)
+    {
+        mDiagnostics->report(Diagnostics::PP_VERSION_NOT_FIRST_LINE_ESSL3,
+                             token->location, token->text);
+        valid = false;
+    }
+
+    if (valid)
+    {
+        mDirectiveHandler->handleVersion(token->location, version);
+        mShaderVersion = version;
+        PredefineMacro(mMacroSet, "__VERSION__", version);
+    }
+}
+
+void DirectiveParser::parseLine(Token *token)
+{
+    ASSERT(getDirective(token) == DIRECTIVE_LINE);
+
+    bool valid = true;
+    bool parsedFileNumber = false;
+    int line = 0, file = 0;
+
+    MacroExpander macroExpander(mTokenizer, mMacroSet, mDiagnostics);
+
+    // Lex the first token after "#line" so we can check it for EOD.
+    macroExpander.lex(token);
+
+    if (isEOD(token))
+    {
+        mDiagnostics->report(Diagnostics::PP_INVALID_LINE_DIRECTIVE, token->location, token->text);
+        valid = false;
+    }
+    else
+    {
+        ExpressionParser expressionParser(&macroExpander, mDiagnostics);
+        ExpressionParser::ErrorSettings errorSettings;
+
+        // See GLES3 section 12.42
+        errorSettings.integerLiteralsMustFit32BitSignedRange = true;
+
+        errorSettings.unexpectedIdentifier = Diagnostics::PP_INVALID_LINE_NUMBER;
+        // The first token was lexed earlier to check if it was EOD. Include
+        // the token in parsing for a second time by setting the
+        // parsePresetToken flag to true.
+        expressionParser.parse(token, &line, true, errorSettings, &valid);
+        if (!isEOD(token) && valid)
+        {
+            errorSettings.unexpectedIdentifier = Diagnostics::PP_INVALID_FILE_NUMBER;
+            // After parsing the line expression expressionParser has also
+            // advanced to the first token of the file expression - this is the
+            // token that makes the parser reduce the "input" rule for the line
+            // expression and stop. So we're using parsePresetToken = true here
+            // as well.
+            expressionParser.parse(token, &file, true, errorSettings, &valid);
+            parsedFileNumber = true;
+        }
+        if (!isEOD(token))
+        {
+            if (valid)
+            {
+                mDiagnostics->report(Diagnostics::PP_UNEXPECTED_TOKEN,
+                                     token->location, token->text);
+                valid = false;
+            }
+            skipUntilEOD(mTokenizer, token);
+        }
+    }
+
+    if (valid)
+    {
+        mTokenizer->setLineNumber(line);
+        if (parsedFileNumber)
+            mTokenizer->setFileNumber(file);
+    }
+}
+
+bool DirectiveParser::skipping() const
+{
+    if (mConditionalStack.empty())
+        return false;
+
+    const ConditionalBlock& block = mConditionalStack.back();
+    return block.skipBlock || block.skipGroup;
+}
+
+void DirectiveParser::parseConditionalIf(Token *token)
+{
+    ConditionalBlock block;
+    block.type = token->text;
+    block.location = token->location;
+
+    if (skipping())
+    {
+        // This conditional block is inside another conditional group
+        // which is skipped. As a consequence this whole block is skipped.
+        // Be careful not to parse the conditional expression that might
+        // emit a diagnostic.
+        skipUntilEOD(mTokenizer, token);
+        block.skipBlock = true;
+    }
+    else
+    {
+        DirectiveType directive = getDirective(token);
+
+        int expression = 0;
+        switch (directive)
+        {
+          case DIRECTIVE_IF:
+            expression = parseExpressionIf(token);
+            break;
+          case DIRECTIVE_IFDEF:
+            expression = parseExpressionIfdef(token);
+            break;
+          case DIRECTIVE_IFNDEF:
+            expression = parseExpressionIfdef(token) == 0 ? 1 : 0;
+            break;
+          default:
+              UNREACHABLE();
+              break;
+        }
+        block.skipGroup = expression == 0;
+        block.foundValidGroup = expression != 0;
+    }
+    mConditionalStack.push_back(block);
+}
+
+int DirectiveParser::parseExpressionIf(Token *token)
+{
+    ASSERT((getDirective(token) == DIRECTIVE_IF) || (getDirective(token) == DIRECTIVE_ELIF));
+
+    DefinedParser definedParser(mTokenizer, mMacroSet, mDiagnostics);
+    MacroExpander macroExpander(&definedParser, mMacroSet, mDiagnostics);
+    ExpressionParser expressionParser(&macroExpander, mDiagnostics);
+
+    int expression = 0;
+    ExpressionParser::ErrorSettings errorSettings;
+    errorSettings.integerLiteralsMustFit32BitSignedRange = false;
+    errorSettings.unexpectedIdentifier                   = Diagnostics::PP_CONDITIONAL_UNEXPECTED_TOKEN;
+
+    bool valid = true;
+    expressionParser.parse(token, &expression, false, errorSettings, &valid);
+
+    // Check if there are tokens after #if expression.
+    if (!isEOD(token))
+    {
+        mDiagnostics->report(Diagnostics::PP_CONDITIONAL_UNEXPECTED_TOKEN,
+                             token->location, token->text);
+        skipUntilEOD(mTokenizer, token);
+    }
+
+    return expression;
+}
+
+int DirectiveParser::parseExpressionIfdef(Token *token)
+{
+    ASSERT((getDirective(token) == DIRECTIVE_IFDEF) || (getDirective(token) == DIRECTIVE_IFNDEF));
+
+    mTokenizer->lex(token);
+    if (token->type != Token::IDENTIFIER)
+    {
+        mDiagnostics->report(Diagnostics::PP_UNEXPECTED_TOKEN,
+                             token->location, token->text);
+        skipUntilEOD(mTokenizer, token);
+        return 0;
+    }
+
+    MacroSet::const_iterator iter = mMacroSet->find(token->text);
+    int expression = iter != mMacroSet->end() ? 1 : 0;
+
+    // Check if there are tokens after #ifdef expression.
+    mTokenizer->lex(token);
+    if (!isEOD(token))
+    {
+        mDiagnostics->report(Diagnostics::PP_CONDITIONAL_UNEXPECTED_TOKEN,
+                             token->location, token->text);
+        skipUntilEOD(mTokenizer, token);
+    }
+    return expression;
+}
+
+}  // namespace pp
diff --git a/gfx/angle/src/compiler/preprocessor/DirectiveParser.h b/gfx/angle/src/compiler/preprocessor/DirectiveParser.h
new file mode 100755
index 000000000..f0e889c8a
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/DirectiveParser.h
@@ -0,0 +1,83 @@
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_PREPROCESSOR_DIRECTIVEPARSER_H_
+#define COMPILER_PREPROCESSOR_DIRECTIVEPARSER_H_
+
+#include "compiler/preprocessor/Lexer.h"
+#include "compiler/preprocessor/Macro.h"
+#include "compiler/preprocessor/SourceLocation.h"
+
+namespace pp
+{
+
+class Diagnostics;
+class DirectiveHandler;
+class Tokenizer;
+
+class DirectiveParser : public Lexer
+{
+  public:
+    DirectiveParser(Tokenizer *tokenizer,
+                    MacroSet *macroSet,
+                    Diagnostics *diagnostics,
+                    DirectiveHandler *directiveHandler);
+
+    void lex(Token *token) override;
+
+  private:
+
+    void parseDirective(Token *token);
+    void parseDefine(Token *token);
+    void parseUndef(Token *token);
+    void parseIf(Token *token);
+    void parseIfdef(Token *token);
+    void parseIfndef(Token *token);
+    void parseElse(Token *token);
+    void parseElif(Token *token);
+    void parseEndif(Token *token);
+    void parseError(Token *token);
+    void parsePragma(Token *token);
+    void parseExtension(Token *token);
+    void parseVersion(Token *token);
+    void parseLine(Token *token);
+
+    bool skipping() const;
+    void parseConditionalIf(Token *token);
+    int parseExpressionIf(Token *token);
+    int parseExpressionIfdef(Token *token);
+
+    struct ConditionalBlock
+    {
+        std::string type;
+        SourceLocation location;
+        bool skipBlock;
+        bool skipGroup;
+        bool foundValidGroup;
+        bool foundElseGroup;
+
+        ConditionalBlock()
+            : skipBlock(false),
+              skipGroup(false),
+              foundValidGroup(false),
+              foundElseGroup(false)
+        {
+        }
+    };
+    bool mPastFirstStatement;
+    bool mSeenNonPreprocessorToken; // Tracks if a non-preprocessor token has been seen yet.  Some macros, such as
+                                    // #extension must be declared before all shader code.
+    std::vector<ConditionalBlock> mConditionalStack;
+    Tokenizer *mTokenizer;
+    MacroSet *mMacroSet;
+    Diagnostics *mDiagnostics;
+    DirectiveHandler *mDirectiveHandler;
+    int mShaderVersion;
+};
+
+}  // namespace pp
+
+#endif  // COMPILER_PREPROCESSOR_DIRECTIVEPARSER_H_
diff --git a/gfx/angle/src/compiler/preprocessor/ExpressionParser.cpp b/gfx/angle/src/compiler/preprocessor/ExpressionParser.cpp
new file mode 100755
index 000000000..ee20a6ff6
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/ExpressionParser.cpp
@@ -0,0 +1,2050 @@
+/* A Bison parser, made by GNU Bison 3.0.4.  */
+
+/* Bison implementation for Yacc-like parsers in C
+
+   Copyright (C) 1984, 1989-1990, 2000-2015 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* As a special exception, you may create a larger work that contains
+   part or all of the Bison parser skeleton and distribute that work
+   under terms of your choice, so long as that work isn't itself a
+   parser generator using the skeleton or a modified version thereof
+   as a parser skeleton.  Alternatively, if you modify or redistribute
+   the parser skeleton itself, you may (at your option) remove this
+   special exception, which will cause the skeleton and the resulting
+   Bison output files to be licensed under the GNU General Public
+   License without this special exception.
+
+   This special exception was added by the Free Software Foundation in
+   version 2.2 of Bison.  */
+
+/* C LALR(1) parser skeleton written by Richard Stallman, by
+   simplifying the original so-called "semantic" parser.  */
+
+/* All symbols defined below should begin with yy or YY, to avoid
+   infringing on user name space.  This should be done even for local
+   variables, as they might otherwise be expanded by user macros.
+   There are some unavoidable exceptions within include files to
+   define necessary library symbols; they are noted "INFRINGES ON
+   USER NAME SPACE" below.  */
+
+/* Identify Bison output.  */
+#define YYBISON 1
+
+/* Bison version.  */
+#define YYBISON_VERSION "3.0.4"
+
+/* Skeleton name.  */
+#define YYSKELETON_NAME "yacc.c"
+
+/* Pure parsers.  */
+#define YYPURE 1
+
+/* Push parsers.  */
+#define YYPUSH 0
+
+/* Pull parsers.  */
+#define YYPULL 1
+
+
+/* Substitute the variable and function names.  */
+#define yyparse         ppparse
+#define yylex           pplex
+#define yyerror         pperror
+#define yydebug         ppdebug
+#define yynerrs         ppnerrs
+
+
+/* Copy the first part of user declarations.  */
+
+
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// This file is auto-generated by generate_parser.sh. DO NOT EDIT!
+
+#if defined(__GNUC__)
+// Triggered by the auto-generated pplval variable.
+#if !defined(__clang__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#else
+#pragma GCC diagnostic ignored "-Wuninitialized"
+#endif
+#elif defined(_MSC_VER)
+#pragma warning(disable: 4065 4244 4701 4702)
+#endif
+
+#include "ExpressionParser.h"
+
+#if defined(_MSC_VER)
+#include <malloc.h>
+#else
+#include <stdlib.h>
+#endif
+
+#include <cassert>
+#include <sstream>
+#include <stdint.h>
+
+#include "DiagnosticsBase.h"
+#include "Lexer.h"
+#include "Token.h"
+#include "common/mathutil.h"
+
+typedef int32_t YYSTYPE;
+typedef uint32_t UNSIGNED_TYPE;
+
+#define YYENABLE_NLS 0
+#define YYLTYPE_IS_TRIVIAL 1
+#define YYSTYPE_IS_TRIVIAL 1
+#define YYSTYPE_IS_DECLARED 1
+
+namespace {
+struct Context
+{
+    pp::Diagnostics* diagnostics;
+    pp::Lexer* lexer;
+    pp::Token* token;
+    int* result;
+    bool parsePresetToken;
+
+    pp::ExpressionParser::ErrorSettings errorSettings;
+    bool *valid;
+
+    void startIgnoreErrors() { ++ignoreErrors; }
+    void endIgnoreErrors() { --ignoreErrors; }
+
+    bool isIgnoringErrors() { return ignoreErrors > 0; }
+
+    int ignoreErrors;
+};
+}  // namespace
+
+
+static int yylex(YYSTYPE* lvalp, Context* context);
+static void yyerror(Context* context, const char* reason);
+
+
+
+# ifndef YY_NULLPTR
+#  if defined __cplusplus && 201103L <= __cplusplus
+#   define YY_NULLPTR nullptr
+#  else
+#   define YY_NULLPTR 0
+#  endif
+# endif
+
+/* Enabling verbose error messages.  */
+#ifdef YYERROR_VERBOSE
+# undef YYERROR_VERBOSE
+# define YYERROR_VERBOSE 1
+#else
+# define YYERROR_VERBOSE 0
+#endif
+
+
+/* Debug traces.  */
+#ifndef YYDEBUG
+# define YYDEBUG 0
+#endif
+#if YYDEBUG
+extern int ppdebug;
+#endif
+
+/* Token type.  */
+#ifndef YYTOKENTYPE
+# define YYTOKENTYPE
+  enum yytokentype
+  {
+    TOK_CONST_INT = 258,
+    TOK_IDENTIFIER = 259,
+    TOK_OP_OR = 260,
+    TOK_OP_AND = 261,
+    TOK_OP_EQ = 262,
+    TOK_OP_NE = 263,
+    TOK_OP_LE = 264,
+    TOK_OP_GE = 265,
+    TOK_OP_LEFT = 266,
+    TOK_OP_RIGHT = 267,
+    TOK_UNARY = 268
+  };
+#endif
+
+/* Value type.  */
+#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
+typedef int YYSTYPE;
+# define YYSTYPE_IS_TRIVIAL 1
+# define YYSTYPE_IS_DECLARED 1
+#endif
+
+
+
+int ppparse (Context *context);
+
+
+
+/* Copy the second part of user declarations.  */
+
+
+
+#ifdef short
+# undef short
+#endif
+
+#ifdef YYTYPE_UINT8
+typedef YYTYPE_UINT8 yytype_uint8;
+#else
+typedef unsigned char yytype_uint8;
+#endif
+
+#ifdef YYTYPE_INT8
+typedef YYTYPE_INT8 yytype_int8;
+#else
+typedef signed char yytype_int8;
+#endif
+
+#ifdef YYTYPE_UINT16
+typedef YYTYPE_UINT16 yytype_uint16;
+#else
+typedef unsigned short int yytype_uint16;
+#endif
+
+#ifdef YYTYPE_INT16
+typedef YYTYPE_INT16 yytype_int16;
+#else
+typedef short int yytype_int16;
+#endif
+
+#ifndef YYSIZE_T
+# ifdef __SIZE_TYPE__
+#  define YYSIZE_T __SIZE_TYPE__
+# elif defined size_t
+#  define YYSIZE_T size_t
+# elif ! defined YYSIZE_T
+#  include <stddef.h> /* INFRINGES ON USER NAME SPACE */
+#  define YYSIZE_T size_t
+# else
+#  define YYSIZE_T unsigned int
+# endif
+#endif
+
+#define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
+
+#ifndef YY_
+# if defined YYENABLE_NLS && YYENABLE_NLS
+#  if ENABLE_NLS
+#   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
+#   define YY_(Msgid) dgettext ("bison-runtime", Msgid)
+#  endif
+# endif
+# ifndef YY_
+#  define YY_(Msgid) Msgid
+# endif
+#endif
+
+#ifndef YY_ATTRIBUTE
+# if (defined __GNUC__                                               \
+      && (2 < __GNUC__ || (__GNUC__ == 2 && 96 <= __GNUC_MINOR__)))  \
+     || defined __SUNPRO_C && 0x5110 <= __SUNPRO_C
+#  define YY_ATTRIBUTE(Spec) __attribute__(Spec)
+# else
+#  define YY_ATTRIBUTE(Spec) /* empty */
+# endif
+#endif
+
+#ifndef YY_ATTRIBUTE_PURE
+# define YY_ATTRIBUTE_PURE   YY_ATTRIBUTE ((__pure__))
+#endif
+
+#ifndef YY_ATTRIBUTE_UNUSED
+# define YY_ATTRIBUTE_UNUSED YY_ATTRIBUTE ((__unused__))
+#endif
+
+#if !defined _Noreturn \
+     && (!defined __STDC_VERSION__ || __STDC_VERSION__ < 201112)
+# if defined _MSC_VER && 1200 <= _MSC_VER
+#  define _Noreturn __declspec (noreturn)
+# else
+#  define _Noreturn YY_ATTRIBUTE ((__noreturn__))
+# endif
+#endif
+
+/* Suppress unused-variable warnings by "using" E.  */
+#if ! defined lint || defined __GNUC__
+# define YYUSE(E) ((void) (E))
+#else
+# define YYUSE(E) /* empty */
+#endif
+
+#if defined __GNUC__ && 407 <= __GNUC__ * 100 + __GNUC_MINOR__
+/* Suppress an incorrect diagnostic about yylval being uninitialized.  */
+# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN \
+    _Pragma ("GCC diagnostic push") \
+    _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"")\
+    _Pragma ("GCC diagnostic ignored \"-Wmaybe-uninitialized\"")
+# define YY_IGNORE_MAYBE_UNINITIALIZED_END \
+    _Pragma ("GCC diagnostic pop")
+#else
+# define YY_INITIAL_VALUE(Value) Value
+#endif
+#ifndef YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+# define YY_IGNORE_MAYBE_UNINITIALIZED_END
+#endif
+#ifndef YY_INITIAL_VALUE
+# define YY_INITIAL_VALUE(Value) /* Nothing. */
+#endif
+
+
+#if ! defined yyoverflow || YYERROR_VERBOSE
+
+/* The parser invokes alloca or malloc; define the necessary symbols.  */
+
+# ifdef YYSTACK_USE_ALLOCA
+#  if YYSTACK_USE_ALLOCA
+#   ifdef __GNUC__
+#    define YYSTACK_ALLOC __builtin_alloca
+#   elif defined __BUILTIN_VA_ARG_INCR
+#    include <alloca.h> /* INFRINGES ON USER NAME SPACE */
+#   elif defined _AIX
+#    define YYSTACK_ALLOC __alloca
+#   elif defined _MSC_VER
+#    include <malloc.h> /* INFRINGES ON USER NAME SPACE */
+#    define alloca _alloca
+#   else
+#    define YYSTACK_ALLOC alloca
+#    if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS
+#     include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
+      /* Use EXIT_SUCCESS as a witness for stdlib.h.  */
+#     ifndef EXIT_SUCCESS
+#      define EXIT_SUCCESS 0
+#     endif
+#    endif
+#   endif
+#  endif
+# endif
+
+# ifdef YYSTACK_ALLOC
+   /* Pacify GCC's 'empty if-body' warning.  */
+#  define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
+#  ifndef YYSTACK_ALLOC_MAXIMUM
+    /* The OS might guarantee only one guard page at the bottom of the stack,
+       and a page size can be as small as 4096 bytes.  So we cannot safely
+       invoke alloca (N) if N exceeds 4096.  Use a slightly smaller number
+       to allow for a few compiler-allocated temporary stack slots.  */
+#   define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
+#  endif
+# else
+#  define YYSTACK_ALLOC YYMALLOC
+#  define YYSTACK_FREE YYFREE
+#  ifndef YYSTACK_ALLOC_MAXIMUM
+#   define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
+#  endif
+#  if (defined __cplusplus && ! defined EXIT_SUCCESS \
+       && ! ((defined YYMALLOC || defined malloc) \
+             && (defined YYFREE || defined free)))
+#   include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
+#   ifndef EXIT_SUCCESS
+#    define EXIT_SUCCESS 0
+#   endif
+#  endif
+#  ifndef YYMALLOC
+#   define YYMALLOC malloc
+#   if ! defined malloc && ! defined EXIT_SUCCESS
+void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
+#   endif
+#  endif
+#  ifndef YYFREE
+#   define YYFREE free
+#   if ! defined free && ! defined EXIT_SUCCESS
+void free (void *); /* INFRINGES ON USER NAME SPACE */
+#   endif
+#  endif
+# endif
+#endif /* ! defined yyoverflow || YYERROR_VERBOSE */
+
+
+#if (! defined yyoverflow \
+     && (! defined __cplusplus \
+         || (defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
+
+/* A type that is properly aligned for any stack member.  */
+union yyalloc
+{
+  yytype_int16 yyss_alloc;
+  YYSTYPE yyvs_alloc;
+};
+
+/* The size of the maximum gap between one aligned stack and the next.  */
+# define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
+
+/* The size of an array large to enough to hold all stacks, each with
+   N elements.  */
+# define YYSTACK_BYTES(N) \
+     ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
+      + YYSTACK_GAP_MAXIMUM)
+
+# define YYCOPY_NEEDED 1
+
+/* Relocate STACK from its old location to the new one.  The
+   local variables YYSIZE and YYSTACKSIZE give the old and new number of
+   elements in the stack, and YYPTR gives the new location of the
+   stack.  Advance YYPTR to a properly aligned location for the next
+   stack.  */
+# define YYSTACK_RELOCATE(Stack_alloc, Stack)                           \
+    do                                                                  \
+      {                                                                 \
+        YYSIZE_T yynewbytes;                                            \
+        YYCOPY (&yyptr->Stack_alloc, Stack, yysize);                    \
+        Stack = &yyptr->Stack_alloc;                                    \
+        yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
+        yyptr += yynewbytes / sizeof (*yyptr);                          \
+      }                                                                 \
+    while (0)
+
+#endif
+
+#if defined YYCOPY_NEEDED && YYCOPY_NEEDED
+/* Copy COUNT objects from SRC to DST.  The source and destination do
+   not overlap.  */
+# ifndef YYCOPY
+#  if defined __GNUC__ && 1 < __GNUC__
+#   define YYCOPY(Dst, Src, Count) \
+      __builtin_memcpy (Dst, Src, (Count) * sizeof (*(Src)))
+#  else
+#   define YYCOPY(Dst, Src, Count)              \
+      do                                        \
+        {                                       \
+          YYSIZE_T yyi;                         \
+          for (yyi = 0; yyi < (Count); yyi++)   \
+            (Dst)[yyi] = (Src)[yyi];            \
+        }                                       \
+      while (0)
+#  endif
+# endif
+#endif /* !YYCOPY_NEEDED */
+
+/* YYFINAL -- State number of the termination state.  */
+#define YYFINAL  15
+/* YYLAST -- Last index in YYTABLE.  */
+#define YYLAST   176
+
+/* YYNTOKENS -- Number of terminals.  */
+#define YYNTOKENS  28
+/* YYNNTS -- Number of nonterminals.  */
+#define YYNNTS  5
+/* YYNRULES -- Number of rules.  */
+#define YYNRULES  29
+/* YYNSTATES -- Number of states.  */
+#define YYNSTATES  55
+
+/* YYTRANSLATE[YYX] -- Symbol number corresponding to YYX as returned
+   by yylex, with out-of-bounds checking.  */
+#define YYUNDEFTOK  2
+#define YYMAXUTOK   268
+
+#define YYTRANSLATE(YYX)                                                \
+  ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
+
+/* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
+   as returned by yylex, without out-of-bounds checking.  */
+static const yytype_uint8 yytranslate[] =
+{
+       0,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,    24,     2,     2,     2,    22,     9,     2,
+      26,    27,    20,    18,     2,    19,     2,    21,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+      12,     2,    13,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     8,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     7,     2,    25,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     1,     2,     3,     4,
+       5,     6,    10,    11,    14,    15,    16,    17,    23
+};
+
+#if YYDEBUG
+  /* YYRLINE[YYN] -- Source line where rule number YYN was defined.  */
+static const yytype_uint16 yyrline[] =
+{
+       0,   108,   108,   115,   116,   127,   127,   148,   148,   169,
+     172,   175,   178,   181,   184,   187,   190,   193,   196,   221,
+     246,   249,   252,   278,   305,   308,   311,   314,   326,   329
+};
+#endif
+
+#if YYDEBUG || YYERROR_VERBOSE || 0
+/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
+   First, the terminals, then, starting at YYNTOKENS, nonterminals.  */
+static const char *const yytname[] =
+{
+  "$end", "error", "$undefined", "TOK_CONST_INT", "TOK_IDENTIFIER",
+  "TOK_OP_OR", "TOK_OP_AND", "'|'", "'^'", "'&'", "TOK_OP_EQ", "TOK_OP_NE",
+  "'<'", "'>'", "TOK_OP_LE", "TOK_OP_GE", "TOK_OP_LEFT", "TOK_OP_RIGHT",
+  "'+'", "'-'", "'*'", "'/'", "'%'", "TOK_UNARY", "'!'", "'~'", "'('",
+  "')'", "$accept", "input", "expression", "$@1", "$@2", YY_NULLPTR
+};
+#endif
+
+# ifdef YYPRINT
+/* YYTOKNUM[NUM] -- (External) token number corresponding to the
+   (internal) symbol number NUM (which must be that of a token).  */
+static const yytype_uint16 yytoknum[] =
+{
+       0,   256,   257,   258,   259,   260,   261,   124,    94,    38,
+     262,   263,    60,    62,   264,   265,   266,   267,    43,    45,
+      42,    47,    37,   268,    33,   126,    40,    41
+};
+# endif
+
+#define YYPACT_NINF -12
+
+#define yypact_value_is_default(Yystate) \
+  (!!((Yystate) == (-12)))
+
+#define YYTABLE_NINF -1
+
+#define yytable_value_is_error(Yytable_value) \
+  0
+
+  /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
+     STATE-NUM.  */
+static const yytype_int16 yypact[] =
+{
+      31,   -12,   -12,    31,    31,    31,    31,    31,    51,    76,
+     -12,   -12,   -12,   -12,    53,   -12,   -12,   -12,    31,    31,
+      31,    31,    31,    31,    31,    31,    31,    31,    31,    31,
+      31,    31,    31,    31,   -12,    31,    31,   124,   138,    26,
+     149,   149,   -11,   -11,   -11,   -11,   154,   154,    -8,    -8,
+     -12,   -12,   -12,    93,   109
+};
+
+  /* YYDEFACT[STATE-NUM] -- Default reduction number in state STATE-NUM.
+     Performed when YYTABLE does not specify something else to do.  Zero
+     means the default is an error.  */
+static const yytype_uint8 yydefact[] =
+{
+       0,     3,     4,     0,     0,     0,     0,     0,     0,     2,
+      28,    27,    25,    26,     0,     1,     5,     7,     0,     0,
+       0,     0,     0,     0,     0,     0,     0,     0,     0,     0,
+       0,     0,     0,     0,    29,     0,     0,     9,    10,    11,
+      13,    12,    17,    16,    15,    14,    19,    18,    21,    20,
+      24,    23,    22,     6,     8
+};
+
+  /* YYPGOTO[NTERM-NUM].  */
+static const yytype_int8 yypgoto[] =
+{
+     -12,   -12,    -3,   -12,   -12
+};
+
+  /* YYDEFGOTO[NTERM-NUM].  */
+static const yytype_int8 yydefgoto[] =
+{
+      -1,     8,     9,    35,    36
+};
+
+  /* YYTABLE[YYPACT[STATE-NUM]] -- What to do in state STATE-NUM.  If
+     positive, shift that token.  If negative, reduce the rule whose
+     number is the opposite.  If YYTABLE_NINF, syntax error.  */
+static const yytype_uint8 yytable[] =
+{
+      10,    11,    12,    13,    14,    27,    28,    29,    30,    31,
+      32,    33,    31,    32,    33,    37,    38,    39,    40,    41,
+      42,    43,    44,    45,    46,    47,    48,    49,    50,    51,
+      52,     0,    53,    54,     1,     2,    21,    22,    23,    24,
+      25,    26,    27,    28,    29,    30,    31,    32,    33,     3,
+       4,    15,     0,     0,     0,     5,     6,     7,    16,    17,
+      18,    19,    20,    21,    22,    23,    24,    25,    26,    27,
+      28,    29,    30,    31,    32,    33,     0,     0,     0,     0,
+      34,    16,    17,    18,    19,    20,    21,    22,    23,    24,
+      25,    26,    27,    28,    29,    30,    31,    32,    33,    17,
+      18,    19,    20,    21,    22,    23,    24,    25,    26,    27,
+      28,    29,    30,    31,    32,    33,    18,    19,    20,    21,
+      22,    23,    24,    25,    26,    27,    28,    29,    30,    31,
+      32,    33,    19,    20,    21,    22,    23,    24,    25,    26,
+      27,    28,    29,    30,    31,    32,    33,    20,    21,    22,
+      23,    24,    25,    26,    27,    28,    29,    30,    31,    32,
+      33,    23,    24,    25,    26,    27,    28,    29,    30,    31,
+      32,    33,    29,    30,    31,    32,    33
+};
+
+static const yytype_int8 yycheck[] =
+{
+       3,     4,     5,     6,     7,    16,    17,    18,    19,    20,
+      21,    22,    20,    21,    22,    18,    19,    20,    21,    22,
+      23,    24,    25,    26,    27,    28,    29,    30,    31,    32,
+      33,    -1,    35,    36,     3,     4,    10,    11,    12,    13,
+      14,    15,    16,    17,    18,    19,    20,    21,    22,    18,
+      19,     0,    -1,    -1,    -1,    24,    25,    26,     5,     6,
+       7,     8,     9,    10,    11,    12,    13,    14,    15,    16,
+      17,    18,    19,    20,    21,    22,    -1,    -1,    -1,    -1,
+      27,     5,     6,     7,     8,     9,    10,    11,    12,    13,
+      14,    15,    16,    17,    18,    19,    20,    21,    22,     6,
+       7,     8,     9,    10,    11,    12,    13,    14,    15,    16,
+      17,    18,    19,    20,    21,    22,     7,     8,     9,    10,
+      11,    12,    13,    14,    15,    16,    17,    18,    19,    20,
+      21,    22,     8,     9,    10,    11,    12,    13,    14,    15,
+      16,    17,    18,    19,    20,    21,    22,     9,    10,    11,
+      12,    13,    14,    15,    16,    17,    18,    19,    20,    21,
+      22,    12,    13,    14,    15,    16,    17,    18,    19,    20,
+      21,    22,    18,    19,    20,    21,    22
+};
+
+  /* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
+     symbol of state STATE-NUM.  */
+static const yytype_uint8 yystos[] =
+{
+       0,     3,     4,    18,    19,    24,    25,    26,    29,    30,
+      30,    30,    30,    30,    30,     0,     5,     6,     7,     8,
+       9,    10,    11,    12,    13,    14,    15,    16,    17,    18,
+      19,    20,    21,    22,    27,    31,    32,    30,    30,    30,
+      30,    30,    30,    30,    30,    30,    30,    30,    30,    30,
+      30,    30,    30,    30,    30
+};
+
+  /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
+static const yytype_uint8 yyr1[] =
+{
+       0,    28,    29,    30,    30,    31,    30,    32,    30,    30,
+      30,    30,    30,    30,    30,    30,    30,    30,    30,    30,
+      30,    30,    30,    30,    30,    30,    30,    30,    30,    30
+};
+
+  /* YYR2[YYN] -- Number of symbols on the right hand side of rule YYN.  */
+static const yytype_uint8 yyr2[] =
+{
+       0,     2,     1,     1,     1,     0,     4,     0,     4,     3,
+       3,     3,     3,     3,     3,     3,     3,     3,     3,     3,
+       3,     3,     3,     3,     3,     2,     2,     2,     2,     3
+};
+
+
+#define yyerrok         (yyerrstatus = 0)
+#define yyclearin       (yychar = YYEMPTY)
+#define YYEMPTY         (-2)
+#define YYEOF           0
+
+#define YYACCEPT        goto yyacceptlab
+#define YYABORT         goto yyabortlab
+#define YYERROR         goto yyerrorlab
+
+
+#define YYRECOVERING()  (!!yyerrstatus)
+
+#define YYBACKUP(Token, Value)                                  \
+do                                                              \
+  if (yychar == YYEMPTY)                                        \
+    {                                                           \
+      yychar = (Token);                                         \
+      yylval = (Value);                                         \
+      YYPOPSTACK (yylen);                                       \
+      yystate = *yyssp;                                         \
+      goto yybackup;                                            \
+    }                                                           \
+  else                                                          \
+    {                                                           \
+      yyerror (context, YY_("syntax error: cannot back up")); \
+      YYERROR;                                                  \
+    }                                                           \
+while (0)
+
+/* Error token number */
+#define YYTERROR        1
+#define YYERRCODE       256
+
+
+
+/* Enable debugging if requested.  */
+#if YYDEBUG
+
+# ifndef YYFPRINTF
+#  include <stdio.h> /* INFRINGES ON USER NAME SPACE */
+#  define YYFPRINTF fprintf
+# endif
+
+# define YYDPRINTF(Args)                        \
+do {                                            \
+  if (yydebug)                                  \
+    YYFPRINTF Args;                             \
+} while (0)
+
+/* This macro is provided for backward compatibility. */
+#ifndef YY_LOCATION_PRINT
+# define YY_LOCATION_PRINT(File, Loc) ((void) 0)
+#endif
+
+
+# define YY_SYMBOL_PRINT(Title, Type, Value, Location)                    \
+do {                                                                      \
+  if (yydebug)                                                            \
+    {                                                                     \
+      YYFPRINTF (stderr, "%s ", Title);                                   \
+      yy_symbol_print (stderr,                                            \
+                  Type, Value, context); \
+      YYFPRINTF (stderr, "\n");                                           \
+    }                                                                     \
+} while (0)
+
+
+/*----------------------------------------.
+| Print this symbol's value on YYOUTPUT.  |
+`----------------------------------------*/
+
+static void
+yy_symbol_value_print (FILE *yyoutput, int yytype, YYSTYPE const * const yyvaluep, Context *context)
+{
+  FILE *yyo = yyoutput;
+  YYUSE (yyo);
+  YYUSE (context);
+  if (!yyvaluep)
+    return;
+# ifdef YYPRINT
+  if (yytype < YYNTOKENS)
+    YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
+# endif
+  YYUSE (yytype);
+}
+
+
+/*--------------------------------.
+| Print this symbol on YYOUTPUT.  |
+`--------------------------------*/
+
+static void
+yy_symbol_print (FILE *yyoutput, int yytype, YYSTYPE const * const yyvaluep, Context *context)
+{
+  YYFPRINTF (yyoutput, "%s %s (",
+             yytype < YYNTOKENS ? "token" : "nterm", yytname[yytype]);
+
+  yy_symbol_value_print (yyoutput, yytype, yyvaluep, context);
+  YYFPRINTF (yyoutput, ")");
+}
+
+/*------------------------------------------------------------------.
+| yy_stack_print -- Print the state stack from its BOTTOM up to its |
+| TOP (included).                                                   |
+`------------------------------------------------------------------*/
+
+static void
+yy_stack_print (yytype_int16 *yybottom, yytype_int16 *yytop)
+{
+  YYFPRINTF (stderr, "Stack now");
+  for (; yybottom <= yytop; yybottom++)
+    {
+      int yybot = *yybottom;
+      YYFPRINTF (stderr, " %d", yybot);
+    }
+  YYFPRINTF (stderr, "\n");
+}
+
+# define YY_STACK_PRINT(Bottom, Top)                            \
+do {                                                            \
+  if (yydebug)                                                  \
+    yy_stack_print ((Bottom), (Top));                           \
+} while (0)
+
+
+/*------------------------------------------------.
+| Report that the YYRULE is going to be reduced.  |
+`------------------------------------------------*/
+
+static void
+yy_reduce_print (yytype_int16 *yyssp, YYSTYPE *yyvsp, int yyrule, Context *context)
+{
+  unsigned long int yylno = yyrline[yyrule];
+  int yynrhs = yyr2[yyrule];
+  int yyi;
+  YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
+             yyrule - 1, yylno);
+  /* The symbols being reduced.  */
+  for (yyi = 0; yyi < yynrhs; yyi++)
+    {
+      YYFPRINTF (stderr, "   $%d = ", yyi + 1);
+      yy_symbol_print (stderr,
+                       yystos[yyssp[yyi + 1 - yynrhs]],
+                       &(yyvsp[(yyi + 1) - (yynrhs)])
+                                              , context);
+      YYFPRINTF (stderr, "\n");
+    }
+}
+
+# define YY_REDUCE_PRINT(Rule)          \
+do {                                    \
+  if (yydebug)                          \
+    yy_reduce_print (yyssp, yyvsp, Rule, context); \
+} while (0)
+
+/* Nonzero means print parse trace.  It is left uninitialized so that
+   multiple parsers can coexist.  */
+int yydebug;
+#else /* !YYDEBUG */
+# define YYDPRINTF(Args)
+# define YY_SYMBOL_PRINT(Title, Type, Value, Location)
+# define YY_STACK_PRINT(Bottom, Top)
+# define YY_REDUCE_PRINT(Rule)
+#endif /* !YYDEBUG */
+
+
+/* YYINITDEPTH -- initial size of the parser's stacks.  */
+#ifndef YYINITDEPTH
+# define YYINITDEPTH 200
+#endif
+
+/* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
+   if the built-in stack extension method is used).
+
+   Do not make this value too large; the results are undefined if
+   YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
+   evaluated with infinite-precision integer arithmetic.  */
+
+#ifndef YYMAXDEPTH
+# define YYMAXDEPTH 10000
+#endif
+
+
+#if YYERROR_VERBOSE
+
+# ifndef yystrlen
+#  if defined __GLIBC__ && defined _STRING_H
+#   define yystrlen strlen
+#  else
+/* Return the length of YYSTR.  */
+static YYSIZE_T
+yystrlen (const char *yystr)
+{
+  YYSIZE_T yylen;
+  for (yylen = 0; yystr[yylen]; yylen++)
+    continue;
+  return yylen;
+}
+#  endif
+# endif
+
+# ifndef yystpcpy
+#  if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
+#   define yystpcpy stpcpy
+#  else
+/* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
+   YYDEST.  */
+static char *
+yystpcpy (char *yydest, const char *yysrc)
+{
+  char *yyd = yydest;
+  const char *yys = yysrc;
+
+  while ((*yyd++ = *yys++) != '\0')
+    continue;
+
+  return yyd - 1;
+}
+#  endif
+# endif
+
+# ifndef yytnamerr
+/* Copy to YYRES the contents of YYSTR after stripping away unnecessary
+   quotes and backslashes, so that it's suitable for yyerror.  The
+   heuristic is that double-quoting is unnecessary unless the string
+   contains an apostrophe, a comma, or backslash (other than
+   backslash-backslash).  YYSTR is taken from yytname.  If YYRES is
+   null, do not copy; instead, return the length of what the result
+   would have been.  */
+static YYSIZE_T
+yytnamerr (char *yyres, const char *yystr)
+{
+  if (*yystr == '"')
+    {
+      YYSIZE_T yyn = 0;
+      char const *yyp = yystr;
+
+      for (;;)
+        switch (*++yyp)
+          {
+          case '\'':
+          case ',':
+            goto do_not_strip_quotes;
+
+          case '\\':
+            if (*++yyp != '\\')
+              goto do_not_strip_quotes;
+            /* Fall through.  */
+          default:
+            if (yyres)
+              yyres[yyn] = *yyp;
+            yyn++;
+            break;
+
+          case '"':
+            if (yyres)
+              yyres[yyn] = '\0';
+            return yyn;
+          }
+    do_not_strip_quotes: ;
+    }
+
+  if (! yyres)
+    return yystrlen (yystr);
+
+  return yystpcpy (yyres, yystr) - yyres;
+}
+# endif
+
+/* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message
+   about the unexpected token YYTOKEN for the state stack whose top is
+   YYSSP.
+
+   Return 0 if *YYMSG was successfully written.  Return 1 if *YYMSG is
+   not large enough to hold the message.  In that case, also set
+   *YYMSG_ALLOC to the required number of bytes.  Return 2 if the
+   required number of bytes is too large to store.  */
+static int
+yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
+                yytype_int16 *yyssp, int yytoken)
+{
+  YYSIZE_T yysize0 = yytnamerr (YY_NULLPTR, yytname[yytoken]);
+  YYSIZE_T yysize = yysize0;
+  enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
+  /* Internationalized format string. */
+  const char *yyformat = YY_NULLPTR;
+  /* Arguments of yyformat. */
+  char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
+  /* Number of reported tokens (one for the "unexpected", one per
+     "expected"). */
+  int yycount = 0;
+
+  /* There are many possibilities here to consider:
+     - If this state is a consistent state with a default action, then
+       the only way this function was invoked is if the default action
+       is an error action.  In that case, don't check for expected
+       tokens because there are none.
+     - The only way there can be no lookahead present (in yychar) is if
+       this state is a consistent state with a default action.  Thus,
+       detecting the absence of a lookahead is sufficient to determine
+       that there is no unexpected or expected token to report.  In that
+       case, just report a simple "syntax error".
+     - Don't assume there isn't a lookahead just because this state is a
+       consistent state with a default action.  There might have been a
+       previous inconsistent state, consistent state with a non-default
+       action, or user semantic action that manipulated yychar.
+     - Of course, the expected token list depends on states to have
+       correct lookahead information, and it depends on the parser not
+       to perform extra reductions after fetching a lookahead from the
+       scanner and before detecting a syntax error.  Thus, state merging
+       (from LALR or IELR) and default reductions corrupt the expected
+       token list.  However, the list is correct for canonical LR with
+       one exception: it will still contain any token that will not be
+       accepted due to an error action in a later state.
+  */
+  if (yytoken != YYEMPTY)
+    {
+      int yyn = yypact[*yyssp];
+      yyarg[yycount++] = yytname[yytoken];
+      if (!yypact_value_is_default (yyn))
+        {
+          /* Start YYX at -YYN if negative to avoid negative indexes in
+             YYCHECK.  In other words, skip the first -YYN actions for
+             this state because they are default actions.  */
+          int yyxbegin = yyn < 0 ? -yyn : 0;
+          /* Stay within bounds of both yycheck and yytname.  */
+          int yychecklim = YYLAST - yyn + 1;
+          int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
+          int yyx;
+
+          for (yyx = yyxbegin; yyx < yyxend; ++yyx)
+            if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
+                && !yytable_value_is_error (yytable[yyx + yyn]))
+              {
+                if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
+                  {
+                    yycount = 1;
+                    yysize = yysize0;
+                    break;
+                  }
+                yyarg[yycount++] = yytname[yyx];
+                {
+                  YYSIZE_T yysize1 = yysize + yytnamerr (YY_NULLPTR, yytname[yyx]);
+                  if (! (yysize <= yysize1
+                         && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+                    return 2;
+                  yysize = yysize1;
+                }
+              }
+        }
+    }
+
+  switch (yycount)
+    {
+# define YYCASE_(N, S)                      \
+      case N:                               \
+        yyformat = S;                       \
+      break
+      YYCASE_(0, YY_("syntax error"));
+      YYCASE_(1, YY_("syntax error, unexpected %s"));
+      YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
+      YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
+      YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
+      YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
+# undef YYCASE_
+    }
+
+  {
+    YYSIZE_T yysize1 = yysize + yystrlen (yyformat);
+    if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+      return 2;
+    yysize = yysize1;
+  }
+
+  if (*yymsg_alloc < yysize)
+    {
+      *yymsg_alloc = 2 * yysize;
+      if (! (yysize <= *yymsg_alloc
+             && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
+        *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
+      return 1;
+    }
+
+  /* Avoid sprintf, as that infringes on the user's name space.
+     Don't have undefined behavior even if the translation
+     produced a string with the wrong number of "%s"s.  */
+  {
+    char *yyp = *yymsg;
+    int yyi = 0;
+    while ((*yyp = *yyformat) != '\0')
+      if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
+        {
+          yyp += yytnamerr (yyp, yyarg[yyi++]);
+          yyformat += 2;
+        }
+      else
+        {
+          yyp++;
+          yyformat++;
+        }
+  }
+  return 0;
+}
+#endif /* YYERROR_VERBOSE */
+
+/*-----------------------------------------------.
+| Release the memory associated to this symbol.  |
+`-----------------------------------------------*/
+
+static void
+yydestruct (const char *yymsg, int yytype, YYSTYPE *yyvaluep, Context *context)
+{
+  YYUSE (yyvaluep);
+  YYUSE (context);
+  if (!yymsg)
+    yymsg = "Deleting";
+  YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
+
+  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+  YYUSE (yytype);
+  YY_IGNORE_MAYBE_UNINITIALIZED_END
+}
+
+
+
+
+/*----------.
+| yyparse.  |
+`----------*/
+
+int
+yyparse (Context *context)
+{
+/* The lookahead symbol.  */
+int yychar;
+
+
+/* The semantic value of the lookahead symbol.  */
+/* Default value used for initialization, for pacifying older GCCs
+   or non-GCC compilers.  */
+YY_INITIAL_VALUE (static YYSTYPE yyval_default;)
+YYSTYPE yylval YY_INITIAL_VALUE (= yyval_default);
+
+    /* Number of syntax errors so far.  */
+    int yynerrs;
+
+    int yystate;
+    /* Number of tokens to shift before error messages enabled.  */
+    int yyerrstatus;
+
+    /* The stacks and their tools:
+       'yyss': related to states.
+       'yyvs': related to semantic values.
+
+       Refer to the stacks through separate pointers, to allow yyoverflow
+       to reallocate them elsewhere.  */
+
+    /* The state stack.  */
+    yytype_int16 yyssa[YYINITDEPTH];
+    yytype_int16 *yyss;
+    yytype_int16 *yyssp;
+
+    /* The semantic value stack.  */
+    YYSTYPE yyvsa[YYINITDEPTH];
+    YYSTYPE *yyvs;
+    YYSTYPE *yyvsp;
+
+    YYSIZE_T yystacksize;
+
+  int yyn;
+  int yyresult;
+  /* Lookahead token as an internal (translated) token number.  */
+  int yytoken = 0;
+  /* The variables used to return semantic value and location from the
+     action routines.  */
+  YYSTYPE yyval;
+
+#if YYERROR_VERBOSE
+  /* Buffer for error messages, and its allocated size.  */
+  char yymsgbuf[128];
+  char *yymsg = yymsgbuf;
+  YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
+#endif
+
+#define YYPOPSTACK(N)   (yyvsp -= (N), yyssp -= (N))
+
+  /* The number of symbols on the RHS of the reduced rule.
+     Keep to zero when no symbol should be popped.  */
+  int yylen = 0;
+
+  yyssp = yyss = yyssa;
+  yyvsp = yyvs = yyvsa;
+  yystacksize = YYINITDEPTH;
+
+  YYDPRINTF ((stderr, "Starting parse\n"));
+
+  yystate = 0;
+  yyerrstatus = 0;
+  yynerrs = 0;
+  yychar = YYEMPTY; /* Cause a token to be read.  */
+  goto yysetstate;
+
+/*------------------------------------------------------------.
+| yynewstate -- Push a new state, which is found in yystate.  |
+`------------------------------------------------------------*/
+ yynewstate:
+  /* In all cases, when you get here, the value and location stacks
+     have just been pushed.  So pushing a state here evens the stacks.  */
+  yyssp++;
+
+ yysetstate:
+  *yyssp = yystate;
+
+  if (yyss + yystacksize - 1 <= yyssp)
+    {
+      /* Get the current used size of the three stacks, in elements.  */
+      YYSIZE_T yysize = yyssp - yyss + 1;
+
+#ifdef yyoverflow
+      {
+        /* Give user a chance to reallocate the stack.  Use copies of
+           these so that the &'s don't force the real ones into
+           memory.  */
+        YYSTYPE *yyvs1 = yyvs;
+        yytype_int16 *yyss1 = yyss;
+
+        /* Each stack pointer address is followed by the size of the
+           data in use in that stack, in bytes.  This used to be a
+           conditional around just the two extra args, but that might
+           be undefined if yyoverflow is a macro.  */
+        yyoverflow (YY_("memory exhausted"),
+                    &yyss1, yysize * sizeof (*yyssp),
+                    &yyvs1, yysize * sizeof (*yyvsp),
+                    &yystacksize);
+
+        yyss = yyss1;
+        yyvs = yyvs1;
+      }
+#else /* no yyoverflow */
+# ifndef YYSTACK_RELOCATE
+      goto yyexhaustedlab;
+# else
+      /* Extend the stack our own way.  */
+      if (YYMAXDEPTH <= yystacksize)
+        goto yyexhaustedlab;
+      yystacksize *= 2;
+      if (YYMAXDEPTH < yystacksize)
+        yystacksize = YYMAXDEPTH;
+
+      {
+        yytype_int16 *yyss1 = yyss;
+        union yyalloc *yyptr =
+          (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
+        if (! yyptr)
+          goto yyexhaustedlab;
+        YYSTACK_RELOCATE (yyss_alloc, yyss);
+        YYSTACK_RELOCATE (yyvs_alloc, yyvs);
+#  undef YYSTACK_RELOCATE
+        if (yyss1 != yyssa)
+          YYSTACK_FREE (yyss1);
+      }
+# endif
+#endif /* no yyoverflow */
+
+      yyssp = yyss + yysize - 1;
+      yyvsp = yyvs + yysize - 1;
+
+      YYDPRINTF ((stderr, "Stack size increased to %lu\n",
+                  (unsigned long int) yystacksize));
+
+      if (yyss + yystacksize - 1 <= yyssp)
+        YYABORT;
+    }
+
+  YYDPRINTF ((stderr, "Entering state %d\n", yystate));
+
+  if (yystate == YYFINAL)
+    YYACCEPT;
+
+  goto yybackup;
+
+/*-----------.
+| yybackup.  |
+`-----------*/
+yybackup:
+
+  /* Do appropriate processing given the current state.  Read a
+     lookahead token if we need one and don't already have one.  */
+
+  /* First try to decide what to do without reference to lookahead token.  */
+  yyn = yypact[yystate];
+  if (yypact_value_is_default (yyn))
+    goto yydefault;
+
+  /* Not known => get a lookahead token if don't already have one.  */
+
+  /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol.  */
+  if (yychar == YYEMPTY)
+    {
+      YYDPRINTF ((stderr, "Reading a token: "));
+      yychar = yylex (&yylval, context);
+    }
+
+  if (yychar <= YYEOF)
+    {
+      yychar = yytoken = YYEOF;
+      YYDPRINTF ((stderr, "Now at end of input.\n"));
+    }
+  else
+    {
+      yytoken = YYTRANSLATE (yychar);
+      YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+    }
+
+  /* If the proper action on seeing token YYTOKEN is to reduce or to
+     detect an error, take that action.  */
+  yyn += yytoken;
+  if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
+    goto yydefault;
+  yyn = yytable[yyn];
+  if (yyn <= 0)
+    {
+      if (yytable_value_is_error (yyn))
+        goto yyerrlab;
+      yyn = -yyn;
+      goto yyreduce;
+    }
+
+  /* Count tokens shifted since error; after three, turn off error
+     status.  */
+  if (yyerrstatus)
+    yyerrstatus--;
+
+  /* Shift the lookahead token.  */
+  YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
+
+  /* Discard the shifted token.  */
+  yychar = YYEMPTY;
+
+  yystate = yyn;
+  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+  *++yyvsp = yylval;
+  YY_IGNORE_MAYBE_UNINITIALIZED_END
+
+  goto yynewstate;
+
+
+/*-----------------------------------------------------------.
+| yydefault -- do the default action for the current state.  |
+`-----------------------------------------------------------*/
+yydefault:
+  yyn = yydefact[yystate];
+  if (yyn == 0)
+    goto yyerrlab;
+  goto yyreduce;
+
+
+/*-----------------------------.
+| yyreduce -- Do a reduction.  |
+`-----------------------------*/
+yyreduce:
+  /* yyn is the number of a rule to reduce with.  */
+  yylen = yyr2[yyn];
+
+  /* If YYLEN is nonzero, implement the default value of the action:
+     '$$ = $1'.
+
+     Otherwise, the following line sets YYVAL to garbage.
+     This behavior is undocumented and Bison
+     users should not rely upon it.  Assigning to YYVAL
+     unconditionally makes the parser a bit smaller, and it avoids a
+     GCC warning that YYVAL may be used uninitialized.  */
+  yyval = yyvsp[1-yylen];
+
+
+  YY_REDUCE_PRINT (yyn);
+  switch (yyn)
+    {
+        case 2:
+
+    {
+        *(context->result) = static_cast<int>((yyvsp[0]));
+        YYACCEPT;
+    }
+
+    break;
+
+  case 4:
+
+    {
+        if (!context->isIgnoringErrors())
+        {
+            // This rule should be applied right after the token is lexed, so we can
+            // refer to context->token in the error message.
+            context->diagnostics->report(context->errorSettings.unexpectedIdentifier,
+                                         context->token->location, context->token->text);
+            *(context->valid) = false;
+        }
+        (yyval) = (yyvsp[0]);
+    }
+
+    break;
+
+  case 5:
+
+    {
+        if ((yyvsp[-1]) != 0)
+        {
+            // Ignore errors in the short-circuited part of the expression.
+            // ESSL3.00 section 3.4:
+            // If an operand is not evaluated, the presence of undefined identifiers
+            // in the operand will not cause an error.
+            // Unevaluated division by zero should not cause an error either.
+            context->startIgnoreErrors();
+        }
+    }
+
+    break;
+
+  case 6:
+
+    {
+        if ((yyvsp[-3]) != 0)
+        {
+            context->endIgnoreErrors();
+            (yyval) = static_cast<YYSTYPE>(1);
+        }
+        else
+        {
+            (yyval) = (yyvsp[-3]) || (yyvsp[0]);
+        }
+    }
+
+    break;
+
+  case 7:
+
+    {
+        if ((yyvsp[-1]) == 0)
+        {
+            // Ignore errors in the short-circuited part of the expression.
+            // ESSL3.00 section 3.4:
+            // If an operand is not evaluated, the presence of undefined identifiers
+            // in the operand will not cause an error.
+            // Unevaluated division by zero should not cause an error either.
+            context->startIgnoreErrors();
+        }
+    }
+
+    break;
+
+  case 8:
+
+    {
+        if ((yyvsp[-3]) == 0)
+        {
+            context->endIgnoreErrors();
+            (yyval) = static_cast<YYSTYPE>(0);
+        }
+        else
+        {
+            (yyval) = (yyvsp[-3]) && (yyvsp[0]);
+        }
+    }
+
+    break;
+
+  case 9:
+
+    {
+        (yyval) = (yyvsp[-2]) | (yyvsp[0]);
+    }
+
+    break;
+
+  case 10:
+
+    {
+        (yyval) = (yyvsp[-2]) ^ (yyvsp[0]);
+    }
+
+    break;
+
+  case 11:
+
+    {
+        (yyval) = (yyvsp[-2]) & (yyvsp[0]);
+    }
+
+    break;
+
+  case 12:
+
+    {
+        (yyval) = (yyvsp[-2]) != (yyvsp[0]);
+    }
+
+    break;
+
+  case 13:
+
+    {
+        (yyval) = (yyvsp[-2]) == (yyvsp[0]);
+    }
+
+    break;
+
+  case 14:
+
+    {
+        (yyval) = (yyvsp[-2]) >= (yyvsp[0]);
+    }
+
+    break;
+
+  case 15:
+
+    {
+        (yyval) = (yyvsp[-2]) <= (yyvsp[0]);
+    }
+
+    break;
+
+  case 16:
+
+    {
+        (yyval) = (yyvsp[-2]) > (yyvsp[0]);
+    }
+
+    break;
+
+  case 17:
+
+    {
+        (yyval) = (yyvsp[-2]) < (yyvsp[0]);
+    }
+
+    break;
+
+  case 18:
+
+    {
+        if ((yyvsp[0]) < 0 || (yyvsp[0]) > 31)
+        {
+            if (!context->isIgnoringErrors())
+            {
+                std::ostringstream stream;
+                stream << (yyvsp[-2]) << " >> " << (yyvsp[0]);
+                std::string text = stream.str();
+                context->diagnostics->report(pp::Diagnostics::PP_UNDEFINED_SHIFT,
+                                             context->token->location,
+                                             text.c_str());
+                *(context->valid) = false;
+            }
+            (yyval) = static_cast<YYSTYPE>(0);
+        }
+        else if ((yyvsp[-2]) < 0)
+        {
+            // Logical shift right.
+            (yyval) = static_cast<YYSTYPE>(static_cast<UNSIGNED_TYPE>((yyvsp[-2])) >> (yyvsp[0]));
+        }
+        else
+        {
+            (yyval) = (yyvsp[-2]) >> (yyvsp[0]);
+        }
+    }
+
+    break;
+
+  case 19:
+
+    {
+        if ((yyvsp[0]) < 0 || (yyvsp[0]) > 31)
+        {
+            if (!context->isIgnoringErrors())
+            {
+                std::ostringstream stream;
+                stream << (yyvsp[-2]) << " << " << (yyvsp[0]);
+                std::string text = stream.str();
+                context->diagnostics->report(pp::Diagnostics::PP_UNDEFINED_SHIFT,
+                                             context->token->location,
+                                             text.c_str());
+                *(context->valid) = false;
+            }
+            (yyval) = static_cast<YYSTYPE>(0);
+        }
+        else if ((yyvsp[-2]) < 0)
+        {
+            // Logical shift left.
+            (yyval) = static_cast<YYSTYPE>(static_cast<UNSIGNED_TYPE>((yyvsp[-2])) << (yyvsp[0]));
+        }
+        else
+        {
+            (yyval) = (yyvsp[-2]) << (yyvsp[0]);
+        }
+    }
+
+    break;
+
+  case 20:
+
+    {
+        (yyval) = gl::WrappingDiff<YYSTYPE>((yyvsp[-2]), (yyvsp[0]));
+    }
+
+    break;
+
+  case 21:
+
+    {
+        (yyval) = gl::WrappingSum<YYSTYPE>((yyvsp[-2]), (yyvsp[0]));
+    }
+
+    break;
+
+  case 22:
+
+    {
+        if ((yyvsp[0]) == 0)
+        {
+            if (!context->isIgnoringErrors())
+            {
+                std::ostringstream stream;
+                stream << (yyvsp[-2]) << " % " << (yyvsp[0]);
+                std::string text = stream.str();
+                context->diagnostics->report(pp::Diagnostics::PP_DIVISION_BY_ZERO,
+                                             context->token->location,
+                                             text.c_str());
+                *(context->valid) = false;
+            }
+            (yyval) = static_cast<YYSTYPE>(0);
+        }
+        else if (((yyvsp[-2]) == std::numeric_limits<YYSTYPE>::min()) && ((yyvsp[0]) == -1))
+        {
+            // Check for the special case where the minimum representable number is
+            // divided by -1. If left alone this has undefined results.
+            (yyval) = 0;
+        }
+        else
+        {
+            (yyval) = (yyvsp[-2]) % (yyvsp[0]);
+        }
+    }
+
+    break;
+
+  case 23:
+
+    {
+        if ((yyvsp[0]) == 0)
+        {
+            if (!context->isIgnoringErrors())
+            {
+                std::ostringstream stream;
+                stream << (yyvsp[-2]) << " / " << (yyvsp[0]);
+                std::string text = stream.str();
+                context->diagnostics->report(pp::Diagnostics::PP_DIVISION_BY_ZERO,
+                                            context->token->location,
+                                            text.c_str());
+                *(context->valid) = false;
+            }
+            (yyval) = static_cast<YYSTYPE>(0);
+        }
+        else if (((yyvsp[-2]) == std::numeric_limits<YYSTYPE>::min()) && ((yyvsp[0]) == -1))
+        {
+            // Check for the special case where the minimum representable number is
+            // divided by -1. If left alone this leads to integer overflow in C++, which
+            // has undefined results.
+            (yyval) = std::numeric_limits<YYSTYPE>::max();
+        }
+        else
+        {
+            (yyval) = (yyvsp[-2]) / (yyvsp[0]);
+        }
+    }
+
+    break;
+
+  case 24:
+
+    {
+        (yyval) = gl::WrappingMul((yyvsp[-2]), (yyvsp[0]));
+    }
+
+    break;
+
+  case 25:
+
+    {
+        (yyval) = ! (yyvsp[0]);
+    }
+
+    break;
+
+  case 26:
+
+    {
+        (yyval) = ~ (yyvsp[0]);
+    }
+
+    break;
+
+  case 27:
+
+    {
+        // Check for negation of minimum representable integer to prevent undefined signed int
+        // overflow.
+        if ((yyvsp[0]) == std::numeric_limits<YYSTYPE>::min())
+        {
+            (yyval) = std::numeric_limits<YYSTYPE>::min();
+        }
+        else
+        {
+            (yyval) = -(yyvsp[0]);
+        }
+    }
+
+    break;
+
+  case 28:
+
+    {
+        (yyval) = + (yyvsp[0]);
+    }
+
+    break;
+
+  case 29:
+
+    {
+        (yyval) = (yyvsp[-1]);
+    }
+
+    break;
+
+
+
+      default: break;
+    }
+  /* User semantic actions sometimes alter yychar, and that requires
+     that yytoken be updated with the new translation.  We take the
+     approach of translating immediately before every use of yytoken.
+     One alternative is translating here after every semantic action,
+     but that translation would be missed if the semantic action invokes
+     YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or
+     if it invokes YYBACKUP.  In the case of YYABORT or YYACCEPT, an
+     incorrect destructor might then be invoked immediately.  In the
+     case of YYERROR or YYBACKUP, subsequent parser actions might lead
+     to an incorrect destructor call or verbose syntax error message
+     before the lookahead is translated.  */
+  YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
+
+  YYPOPSTACK (yylen);
+  yylen = 0;
+  YY_STACK_PRINT (yyss, yyssp);
+
+  *++yyvsp = yyval;
+
+  /* Now 'shift' the result of the reduction.  Determine what state
+     that goes to, based on the state we popped back to and the rule
+     number reduced by.  */
+
+  yyn = yyr1[yyn];
+
+  yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
+  if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
+    yystate = yytable[yystate];
+  else
+    yystate = yydefgoto[yyn - YYNTOKENS];
+
+  goto yynewstate;
+
+
+/*--------------------------------------.
+| yyerrlab -- here on detecting error.  |
+`--------------------------------------*/
+yyerrlab:
+  /* Make sure we have latest lookahead translation.  See comments at
+     user semantic actions for why this is necessary.  */
+  yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
+
+  /* If not already recovering from an error, report this error.  */
+  if (!yyerrstatus)
+    {
+      ++yynerrs;
+#if ! YYERROR_VERBOSE
+      yyerror (context, YY_("syntax error"));
+#else
+# define YYSYNTAX_ERROR yysyntax_error (&yymsg_alloc, &yymsg, \
+                                        yyssp, yytoken)
+      {
+        char const *yymsgp = YY_("syntax error");
+        int yysyntax_error_status;
+        yysyntax_error_status = YYSYNTAX_ERROR;
+        if (yysyntax_error_status == 0)
+          yymsgp = yymsg;
+        else if (yysyntax_error_status == 1)
+          {
+            if (yymsg != yymsgbuf)
+              YYSTACK_FREE (yymsg);
+            yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
+            if (!yymsg)
+              {
+                yymsg = yymsgbuf;
+                yymsg_alloc = sizeof yymsgbuf;
+                yysyntax_error_status = 2;
+              }
+            else
+              {
+                yysyntax_error_status = YYSYNTAX_ERROR;
+                yymsgp = yymsg;
+              }
+          }
+        yyerror (context, yymsgp);
+        if (yysyntax_error_status == 2)
+          goto yyexhaustedlab;
+      }
+# undef YYSYNTAX_ERROR
+#endif
+    }
+
+
+
+  if (yyerrstatus == 3)
+    {
+      /* If just tried and failed to reuse lookahead token after an
+         error, discard it.  */
+
+      if (yychar <= YYEOF)
+        {
+          /* Return failure if at end of input.  */
+          if (yychar == YYEOF)
+            YYABORT;
+        }
+      else
+        {
+          yydestruct ("Error: discarding",
+                      yytoken, &yylval, context);
+          yychar = YYEMPTY;
+        }
+    }
+
+  /* Else will try to reuse lookahead token after shifting the error
+     token.  */
+  goto yyerrlab1;
+
+
+/*---------------------------------------------------.
+| yyerrorlab -- error raised explicitly by YYERROR.  |
+`---------------------------------------------------*/
+yyerrorlab:
+
+  /* Pacify compilers like GCC when the user code never invokes
+     YYERROR and the label yyerrorlab therefore never appears in user
+     code.  */
+  if (/*CONSTCOND*/ 0)
+     goto yyerrorlab;
+
+  /* Do not reclaim the symbols of the rule whose action triggered
+     this YYERROR.  */
+  YYPOPSTACK (yylen);
+  yylen = 0;
+  YY_STACK_PRINT (yyss, yyssp);
+  yystate = *yyssp;
+  goto yyerrlab1;
+
+
+/*-------------------------------------------------------------.
+| yyerrlab1 -- common code for both syntax error and YYERROR.  |
+`-------------------------------------------------------------*/
+yyerrlab1:
+  yyerrstatus = 3;      /* Each real token shifted decrements this.  */
+
+  for (;;)
+    {
+      yyn = yypact[yystate];
+      if (!yypact_value_is_default (yyn))
+        {
+          yyn += YYTERROR;
+          if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
+            {
+              yyn = yytable[yyn];
+              if (0 < yyn)
+                break;
+            }
+        }
+
+      /* Pop the current state because it cannot handle the error token.  */
+      if (yyssp == yyss)
+        YYABORT;
+
+
+      yydestruct ("Error: popping",
+                  yystos[yystate], yyvsp, context);
+      YYPOPSTACK (1);
+      yystate = *yyssp;
+      YY_STACK_PRINT (yyss, yyssp);
+    }
+
+  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+  *++yyvsp = yylval;
+  YY_IGNORE_MAYBE_UNINITIALIZED_END
+
+
+  /* Shift the error token.  */
+  YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
+
+  yystate = yyn;
+  goto yynewstate;
+
+
+/*-------------------------------------.
+| yyacceptlab -- YYACCEPT comes here.  |
+`-------------------------------------*/
+yyacceptlab:
+  yyresult = 0;
+  goto yyreturn;
+
+/*-----------------------------------.
+| yyabortlab -- YYABORT comes here.  |
+`-----------------------------------*/
+yyabortlab:
+  yyresult = 1;
+  goto yyreturn;
+
+#if !defined yyoverflow || YYERROR_VERBOSE
+/*-------------------------------------------------.
+| yyexhaustedlab -- memory exhaustion comes here.  |
+`-------------------------------------------------*/
+yyexhaustedlab:
+  yyerror (context, YY_("memory exhausted"));
+  yyresult = 2;
+  /* Fall through.  */
+#endif
+
+yyreturn:
+  if (yychar != YYEMPTY)
+    {
+      /* Make sure we have latest lookahead translation.  See comments at
+         user semantic actions for why this is necessary.  */
+      yytoken = YYTRANSLATE (yychar);
+      yydestruct ("Cleanup: discarding lookahead",
+                  yytoken, &yylval, context);
+    }
+  /* Do not reclaim the symbols of the rule whose action triggered
+     this YYABORT or YYACCEPT.  */
+  YYPOPSTACK (yylen);
+  YY_STACK_PRINT (yyss, yyssp);
+  while (yyssp != yyss)
+    {
+      yydestruct ("Cleanup: popping",
+                  yystos[*yyssp], yyvsp, context);
+      YYPOPSTACK (1);
+    }
+#ifndef yyoverflow
+  if (yyss != yyssa)
+    YYSTACK_FREE (yyss);
+#endif
+#if YYERROR_VERBOSE
+  if (yymsg != yymsgbuf)
+    YYSTACK_FREE (yymsg);
+#endif
+  return yyresult;
+}
+
+
+
+int yylex(YYSTYPE *lvalp, Context *context)
+{
+    pp::Token *token = context->token;
+    if (!context->parsePresetToken)
+    {
+        context->lexer->lex(token);
+    }
+    context->parsePresetToken = false;
+
+    int type = 0;
+
+    switch (token->type)
+    {
+      case pp::Token::CONST_INT: {
+        unsigned int val = 0;
+        int testVal = 0;
+        if (!token->uValue(&val) || (!token->iValue(&testVal) &&
+                                     context->errorSettings.integerLiteralsMustFit32BitSignedRange))
+        {
+            context->diagnostics->report(pp::Diagnostics::PP_INTEGER_OVERFLOW,
+                                         token->location, token->text);
+            *(context->valid) = false;
+        }
+        *lvalp = static_cast<YYSTYPE>(val);
+        type = TOK_CONST_INT;
+        break;
+      }
+      case pp::Token::IDENTIFIER:
+        *lvalp = static_cast<YYSTYPE>(-1);
+        type = TOK_IDENTIFIER;
+        break;
+      case pp::Token::OP_OR:
+        type = TOK_OP_OR;
+        break;
+      case pp::Token::OP_AND:
+        type = TOK_OP_AND;
+        break;
+      case pp::Token::OP_NE:
+        type = TOK_OP_NE;
+        break;
+      case pp::Token::OP_EQ:
+        type = TOK_OP_EQ;
+        break;
+      case pp::Token::OP_GE:
+        type = TOK_OP_GE;
+        break;
+      case pp::Token::OP_LE:
+        type = TOK_OP_LE;
+        break;
+      case pp::Token::OP_RIGHT:
+        type = TOK_OP_RIGHT;
+        break;
+      case pp::Token::OP_LEFT:
+        type = TOK_OP_LEFT;
+        break;
+      case '|':
+      case '^':
+      case '&':
+      case '>':
+      case '<':
+      case '-':
+      case '+':
+      case '%':
+      case '/':
+      case '*':
+      case '!':
+      case '~':
+      case '(':
+      case ')':
+        type = token->type;
+        break;
+
+      default:
+        break;
+    }
+
+    return type;
+}
+
+void yyerror(Context *context, const char *reason)
+{
+    context->diagnostics->report(pp::Diagnostics::PP_INVALID_EXPRESSION,
+                                 context->token->location,
+                                 reason);
+}
+
+namespace pp {
+
+ExpressionParser::ExpressionParser(Lexer *lexer, Diagnostics *diagnostics)
+    : mLexer(lexer),
+      mDiagnostics(diagnostics)
+{
+}
+
+bool ExpressionParser::parse(Token *token,
+                             int *result,
+                             bool parsePresetToken,
+                             const ErrorSettings &errorSettings,
+                             bool *valid)
+{
+    Context context;
+    context.diagnostics = mDiagnostics;
+    context.lexer = mLexer;
+    context.token = token;
+    context.result = result;
+    context.ignoreErrors = 0;
+    context.parsePresetToken = parsePresetToken;
+    context.errorSettings    = errorSettings;
+    context.valid            = valid;
+    int ret = yyparse(&context);
+    switch (ret)
+    {
+      case 0:
+      case 1:
+        break;
+
+      case 2:
+        mDiagnostics->report(Diagnostics::PP_OUT_OF_MEMORY, token->location, "");
+        break;
+
+      default:
+        assert(false);
+        mDiagnostics->report(Diagnostics::PP_INTERNAL_ERROR, token->location, "");
+        break;
+    }
+
+    return ret == 0;
+}
+
+}  // namespace pp
diff --git a/gfx/angle/src/compiler/preprocessor/ExpressionParser.h b/gfx/angle/src/compiler/preprocessor/ExpressionParser.h
new file mode 100755
index 000000000..0f2901b87
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/ExpressionParser.h
@@ -0,0 +1,43 @@
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_PREPROCESSOR_EXPRESSIONPARSER_H_
+#define COMPILER_PREPROCESSOR_EXPRESSIONPARSER_H_
+
+#include "common/angleutils.h"
+#include "compiler/preprocessor/DiagnosticsBase.h"
+
+namespace pp
+{
+
+class Lexer;
+struct Token;
+
+class ExpressionParser : angle::NonCopyable
+{
+  public:
+    struct ErrorSettings
+    {
+        Diagnostics::ID unexpectedIdentifier;
+        bool integerLiteralsMustFit32BitSignedRange;
+    };
+
+    ExpressionParser(Lexer *lexer, Diagnostics *diagnostics);
+
+    bool parse(Token *token,
+               int *result,
+               bool parsePresetToken,
+               const ErrorSettings &errorSettings,
+               bool *valid);
+
+  private:
+    Lexer *mLexer;
+    Diagnostics *mDiagnostics;
+};
+
+}  // namespace pp
+
+#endif  // COMPILER_PREPROCESSOR_EXPRESSIONPARSER_H_
diff --git a/gfx/angle/src/compiler/preprocessor/ExpressionParser.y b/gfx/angle/src/compiler/preprocessor/ExpressionParser.y
new file mode 100755
index 000000000..4dbc9e828
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/ExpressionParser.y
@@ -0,0 +1,465 @@
+/*
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+This file contains the Yacc grammar for GLSL ES preprocessor expression.
+
+IF YOU MODIFY THIS FILE YOU ALSO NEED TO RUN generate_parser.sh,
+WHICH GENERATES THE GLSL ES preprocessor expression parser.
+*/
+
+%{
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// This file is auto-generated by generate_parser.sh. DO NOT EDIT!
+
+#if defined(__GNUC__)
+// Triggered by the auto-generated pplval variable.
+#if !defined(__clang__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#else
+#pragma GCC diagnostic ignored "-Wuninitialized"
+#endif
+#elif defined(_MSC_VER)
+#pragma warning(disable: 4065 4244 4701 4702)
+#endif
+
+#include "ExpressionParser.h"
+
+#if defined(_MSC_VER)
+#include <malloc.h>
+#else
+#include <stdlib.h>
+#endif
+
+#include <cassert>
+#include <sstream>
+#include <stdint.h>
+
+#include "DiagnosticsBase.h"
+#include "Lexer.h"
+#include "Token.h"
+#include "common/mathutil.h"
+
+typedef int32_t YYSTYPE;
+typedef uint32_t UNSIGNED_TYPE;
+
+#define YYENABLE_NLS 0
+#define YYLTYPE_IS_TRIVIAL 1
+#define YYSTYPE_IS_TRIVIAL 1
+#define YYSTYPE_IS_DECLARED 1
+
+namespace {
+struct Context
+{
+    pp::Diagnostics* diagnostics;
+    pp::Lexer* lexer;
+    pp::Token* token;
+    int* result;
+    bool parsePresetToken;
+
+    pp::ExpressionParser::ErrorSettings errorSettings;
+    bool *valid;
+
+    void startIgnoreErrors() { ++ignoreErrors; }
+    void endIgnoreErrors() { --ignoreErrors; }
+
+    bool isIgnoringErrors() { return ignoreErrors > 0; }
+
+    int ignoreErrors;
+};
+}  // namespace
+%}
+
+%pure-parser
+%name-prefix "pp"
+%parse-param {Context *context}
+%lex-param {Context *context}
+
+%{
+static int yylex(YYSTYPE* lvalp, Context* context);
+static void yyerror(Context* context, const char* reason);
+%}
+
+%token TOK_CONST_INT
+%token TOK_IDENTIFIER
+%left TOK_OP_OR
+%left TOK_OP_AND
+%left '|'
+%left '^'
+%left '&'
+%left TOK_OP_EQ TOK_OP_NE
+%left '<' '>' TOK_OP_LE TOK_OP_GE
+%left TOK_OP_LEFT TOK_OP_RIGHT
+%left '+' '-'
+%left '*' '/' '%'
+%right TOK_UNARY
+
+%%
+
+input
+    : expression {
+        *(context->result) = static_cast<int>($1);
+        YYACCEPT;
+    }
+;
+
+expression
+    : TOK_CONST_INT
+    | TOK_IDENTIFIER {
+        if (!context->isIgnoringErrors())
+        {
+            // This rule should be applied right after the token is lexed, so we can
+            // refer to context->token in the error message.
+            context->diagnostics->report(context->errorSettings.unexpectedIdentifier,
+                                         context->token->location, context->token->text);
+            *(context->valid) = false;
+        }
+        $$ = $1;
+    }
+    | expression TOK_OP_OR {
+        if ($1 != 0)
+        {
+            // Ignore errors in the short-circuited part of the expression.
+            // ESSL3.00 section 3.4:
+            // If an operand is not evaluated, the presence of undefined identifiers
+            // in the operand will not cause an error.
+            // Unevaluated division by zero should not cause an error either.
+            context->startIgnoreErrors();
+        }
+    } expression {
+        if ($1 != 0)
+        {
+            context->endIgnoreErrors();
+            $$ = static_cast<YYSTYPE>(1);
+        }
+        else
+        {
+            $$ = $1 || $4;
+        }
+    }
+    | expression TOK_OP_AND {
+        if ($1 == 0)
+        {
+            // Ignore errors in the short-circuited part of the expression.
+            // ESSL3.00 section 3.4:
+            // If an operand is not evaluated, the presence of undefined identifiers
+            // in the operand will not cause an error.
+            // Unevaluated division by zero should not cause an error either.
+            context->startIgnoreErrors();
+        }
+    } expression {
+        if ($1 == 0)
+        {
+            context->endIgnoreErrors();
+            $$ = static_cast<YYSTYPE>(0);
+        }
+        else
+        {
+            $$ = $1 && $4;
+        }
+    }
+    | expression '|' expression {
+        $$ = $1 | $3;
+    }
+    | expression '^' expression {
+        $$ = $1 ^ $3;
+    }
+    | expression '&' expression {
+        $$ = $1 & $3;
+    }
+    | expression TOK_OP_NE expression {
+        $$ = $1 != $3;
+    }
+    | expression TOK_OP_EQ expression {
+        $$ = $1 == $3;
+    }
+    | expression TOK_OP_GE expression {
+        $$ = $1 >= $3;
+    }
+    | expression TOK_OP_LE expression {
+        $$ = $1 <= $3;
+    }
+    | expression '>' expression {
+        $$ = $1 > $3;
+    }
+    | expression '<' expression {
+        $$ = $1 < $3;
+    }
+    | expression TOK_OP_RIGHT expression {
+        if ($3 < 0 || $3 > 31)
+        {
+            if (!context->isIgnoringErrors())
+            {
+                std::ostringstream stream;
+                stream << $1 << " >> " << $3;
+                std::string text = stream.str();
+                context->diagnostics->report(pp::Diagnostics::PP_UNDEFINED_SHIFT,
+                                             context->token->location,
+                                             text.c_str());
+                *(context->valid) = false;
+            }
+            $$ = static_cast<YYSTYPE>(0);
+        }
+        else if ($1 < 0)
+        {
+            // Logical shift right.
+            $$ = static_cast<YYSTYPE>(static_cast<UNSIGNED_TYPE>($1) >> $3);
+        }
+        else
+        {
+            $$ = $1 >> $3;
+        }
+    }
+    | expression TOK_OP_LEFT expression {
+        if ($3 < 0 || $3 > 31)
+        {
+            if (!context->isIgnoringErrors())
+            {
+                std::ostringstream stream;
+                stream << $1 << " << " << $3;
+                std::string text = stream.str();
+                context->diagnostics->report(pp::Diagnostics::PP_UNDEFINED_SHIFT,
+                                             context->token->location,
+                                             text.c_str());
+                *(context->valid) = false;
+            }
+            $$ = static_cast<YYSTYPE>(0);
+        }
+        else if ($1 < 0)
+        {
+            // Logical shift left.
+            $$ = static_cast<YYSTYPE>(static_cast<UNSIGNED_TYPE>($1) << $3);
+        }
+        else
+        {
+            $$ = $1 << $3;
+        }
+    }
+    | expression '-' expression {
+        $$ = gl::WrappingDiff<YYSTYPE>($1, $3);
+    }
+    | expression '+' expression {
+        $$ = gl::WrappingSum<YYSTYPE>($1, $3);
+    }
+    | expression '%' expression {
+        if ($3 == 0)
+        {
+            if (!context->isIgnoringErrors())
+            {
+                std::ostringstream stream;
+                stream << $1 << " % " << $3;
+                std::string text = stream.str();
+                context->diagnostics->report(pp::Diagnostics::PP_DIVISION_BY_ZERO,
+                                             context->token->location,
+                                             text.c_str());
+                *(context->valid) = false;
+            }
+            $$ = static_cast<YYSTYPE>(0);
+        }
+        else if (($1 == std::numeric_limits<YYSTYPE>::min()) && ($3 == -1))
+        {
+            // Check for the special case where the minimum representable number is
+            // divided by -1. If left alone this has undefined results.
+            $$ = 0;
+        }
+        else
+        {
+            $$ = $1 % $3;
+        }
+    }
+    | expression '/' expression {
+        if ($3 == 0)
+        {
+            if (!context->isIgnoringErrors())
+            {
+                std::ostringstream stream;
+                stream << $1 << " / " << $3;
+                std::string text = stream.str();
+                context->diagnostics->report(pp::Diagnostics::PP_DIVISION_BY_ZERO,
+                                            context->token->location,
+                                            text.c_str());
+                *(context->valid) = false;
+            }
+            $$ = static_cast<YYSTYPE>(0);
+        }
+        else if (($1 == std::numeric_limits<YYSTYPE>::min()) && ($3 == -1))
+        {
+            // Check for the special case where the minimum representable number is
+            // divided by -1. If left alone this leads to integer overflow in C++, which
+            // has undefined results.
+            $$ = std::numeric_limits<YYSTYPE>::max();
+        }
+        else
+        {
+            $$ = $1 / $3;
+        }
+    }
+    | expression '*' expression {
+        $$ = gl::WrappingMul($1, $3);
+    }
+    | '!' expression %prec TOK_UNARY {
+        $$ = ! $2;
+    }
+    | '~' expression %prec TOK_UNARY {
+        $$ = ~ $2;
+    }
+    | '-' expression %prec TOK_UNARY {
+        // Check for negation of minimum representable integer to prevent undefined signed int
+        // overflow.
+        if ($2 == std::numeric_limits<YYSTYPE>::min())
+        {
+            $$ = std::numeric_limits<YYSTYPE>::min();
+        }
+        else
+        {
+            $$ = -$2;
+        }
+    }
+    | '+' expression %prec TOK_UNARY {
+        $$ = + $2;
+    }
+    | '(' expression ')' {
+        $$ = $2;
+    }
+;
+
+%%
+
+int yylex(YYSTYPE *lvalp, Context *context)
+{
+    pp::Token *token = context->token;
+    if (!context->parsePresetToken)
+    {
+        context->lexer->lex(token);
+    }
+    context->parsePresetToken = false;
+
+    int type = 0;
+
+    switch (token->type)
+    {
+      case pp::Token::CONST_INT: {
+        unsigned int val = 0;
+        int testVal = 0;
+        if (!token->uValue(&val) || (!token->iValue(&testVal) &&
+                                     context->errorSettings.integerLiteralsMustFit32BitSignedRange))
+        {
+            context->diagnostics->report(pp::Diagnostics::PP_INTEGER_OVERFLOW,
+                                         token->location, token->text);
+            *(context->valid) = false;
+        }
+        *lvalp = static_cast<YYSTYPE>(val);
+        type = TOK_CONST_INT;
+        break;
+      }
+      case pp::Token::IDENTIFIER:
+        *lvalp = static_cast<YYSTYPE>(-1);
+        type = TOK_IDENTIFIER;
+        break;
+      case pp::Token::OP_OR:
+        type = TOK_OP_OR;
+        break;
+      case pp::Token::OP_AND:
+        type = TOK_OP_AND;
+        break;
+      case pp::Token::OP_NE:
+        type = TOK_OP_NE;
+        break;
+      case pp::Token::OP_EQ:
+        type = TOK_OP_EQ;
+        break;
+      case pp::Token::OP_GE:
+        type = TOK_OP_GE;
+        break;
+      case pp::Token::OP_LE:
+        type = TOK_OP_LE;
+        break;
+      case pp::Token::OP_RIGHT:
+        type = TOK_OP_RIGHT;
+        break;
+      case pp::Token::OP_LEFT:
+        type = TOK_OP_LEFT;
+        break;
+      case '|':
+      case '^':
+      case '&':
+      case '>':
+      case '<':
+      case '-':
+      case '+':
+      case '%':
+      case '/':
+      case '*':
+      case '!':
+      case '~':
+      case '(':
+      case ')':
+        type = token->type;
+        break;
+
+      default:
+        break;
+    }
+
+    return type;
+}
+
+void yyerror(Context *context, const char *reason)
+{
+    context->diagnostics->report(pp::Diagnostics::PP_INVALID_EXPRESSION,
+                                 context->token->location,
+                                 reason);
+}
+
+namespace pp {
+
+ExpressionParser::ExpressionParser(Lexer *lexer, Diagnostics *diagnostics)
+    : mLexer(lexer),
+      mDiagnostics(diagnostics)
+{
+}
+
+bool ExpressionParser::parse(Token *token,
+                             int *result,
+                             bool parsePresetToken,
+                             const ErrorSettings &errorSettings,
+                             bool *valid)
+{
+    Context context;
+    context.diagnostics = mDiagnostics;
+    context.lexer = mLexer;
+    context.token = token;
+    context.result = result;
+    context.ignoreErrors = 0;
+    context.parsePresetToken = parsePresetToken;
+    context.errorSettings    = errorSettings;
+    context.valid            = valid;
+    int ret = yyparse(&context);
+    switch (ret)
+    {
+      case 0:
+      case 1:
+        break;
+
+      case 2:
+        mDiagnostics->report(Diagnostics::PP_OUT_OF_MEMORY, token->location, "");
+        break;
+
+      default:
+        assert(false);
+        mDiagnostics->report(Diagnostics::PP_INTERNAL_ERROR, token->location, "");
+        break;
+    }
+
+    return ret == 0;
+}
+
+}  // namespace pp
diff --git a/gfx/angle/src/compiler/preprocessor/Input.cpp b/gfx/angle/src/compiler/preprocessor/Input.cpp
new file mode 100755
index 000000000..8bce56ff2
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/Input.cpp
@@ -0,0 +1,117 @@
+//
+// Copyright (c) 2011 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "compiler/preprocessor/Input.h"
+
+#include <algorithm>
+#include <cstring>
+
+#include "common/debug.h"
+
+namespace pp
+{
+
+Input::Input() : mCount(0), mString(0)
+{
+}
+
+Input::Input(size_t count, const char *const string[], const int length[]) :
+    mCount(count),
+    mString(string)
+{
+    mLength.reserve(mCount);
+    for (size_t i = 0; i < mCount; ++i)
+    {
+        int len = length ? length[i] : -1;
+        mLength.push_back(len < 0 ? std::strlen(mString[i]) : len);
+    }
+}
+
+const char *Input::skipChar()
+{
+    // This function should only be called when there is a character to skip.
+    ASSERT(mReadLoc.cIndex < mLength[mReadLoc.sIndex]);
+    ++mReadLoc.cIndex;
+    if (mReadLoc.cIndex == mLength[mReadLoc.sIndex])
+    {
+        ++mReadLoc.sIndex;
+        mReadLoc.cIndex = 0;
+    }
+    if (mReadLoc.sIndex >= mCount)
+    {
+        return nullptr;
+    }
+    return mString[mReadLoc.sIndex] + mReadLoc.cIndex;
+}
+
+size_t Input::read(char *buf, size_t maxSize, int *lineNo)
+{
+    size_t nRead = 0;
+    // The previous call to read might have stopped copying the string when encountering a line
+    // continuation. Check for this possibility first.
+    if (mReadLoc.sIndex < mCount && maxSize > 0)
+    {
+        const char *c = mString[mReadLoc.sIndex] + mReadLoc.cIndex;
+        if ((*c) == '\\')
+        {
+            c = skipChar();
+            if (c != nullptr && (*c) == '\n')
+            {
+                // Line continuation of backslash + newline.
+                skipChar();
+                ++(*lineNo);
+            }
+            else if (c != nullptr && (*c) == '\r')
+            {
+                // Line continuation. Could be backslash + '\r\n' or just backslash + '\r'.
+                c = skipChar();
+                if (c != nullptr && (*c) == '\n')
+                {
+                    skipChar();
+                }
+                ++(*lineNo);
+            }
+            else
+            {
+                // Not line continuation, so write the skipped backslash to buf.
+                *buf = '\\';
+                ++nRead;
+            }
+        }
+    }
+
+    size_t maxRead = maxSize;
+    while ((nRead < maxRead) && (mReadLoc.sIndex < mCount))
+    {
+        size_t size = mLength[mReadLoc.sIndex] - mReadLoc.cIndex;
+        size = std::min(size, maxSize);
+        for (size_t i = 0; i < size; ++i)
+        {
+            // Stop if a possible line continuation is encountered.
+            // It will be processed on the next call on input, which skips it
+            // and increments line number if necessary.
+            if (*(mString[mReadLoc.sIndex] + mReadLoc.cIndex + i) == '\\')
+            {
+                size = i;
+                maxRead = nRead + size;  // Stop reading right before the backslash.
+            }
+        }
+        std::memcpy(buf + nRead, mString[mReadLoc.sIndex] + mReadLoc.cIndex, size);
+        nRead += size;
+        mReadLoc.cIndex += size;
+
+        // Advance string if we reached the end of current string.
+        if (mReadLoc.cIndex == mLength[mReadLoc.sIndex])
+        {
+            ++mReadLoc.sIndex;
+            mReadLoc.cIndex = 0;
+        }
+    }
+    return nRead;
+}
+
+}  // namespace pp
+
diff --git a/gfx/angle/src/compiler/preprocessor/Input.h b/gfx/angle/src/compiler/preprocessor/Input.h
new file mode 100755
index 000000000..ecbb04962
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/Input.h
@@ -0,0 +1,66 @@
+//
+// Copyright (c) 2011 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_PREPROCESSOR_INPUT_H_
+#define COMPILER_PREPROCESSOR_INPUT_H_
+
+#include <cstddef>
+#include <vector>
+
+namespace pp
+{
+
+// Holds and reads input for Lexer.
+class Input
+{
+  public:
+    Input();
+    Input(size_t count, const char *const string[], const int length[]);
+
+    size_t count() const
+    {
+        return mCount;
+    }
+    const char *string(size_t index) const
+    {
+        return mString[index];
+    }
+    size_t length(size_t index) const
+    {
+        return mLength[index];
+    }
+
+    size_t read(char *buf, size_t maxSize, int *lineNo);
+
+    struct Location
+    {
+        size_t sIndex;  // String index;
+        size_t cIndex;  // Char index.
+
+        Location()
+            : sIndex(0),
+              cIndex(0)
+        {
+        }
+    };
+    const Location &readLoc() const { return mReadLoc; }
+
+  private:
+    // Skip a character and return the next character after the one that was skipped.
+    // Return nullptr if data runs out.
+    const char *skipChar();
+
+    // Input.
+    size_t mCount;
+    const char * const *mString;
+    std::vector<size_t> mLength;
+
+    Location mReadLoc;
+};
+
+}  // namespace pp
+
+#endif  // COMPILER_PREPROCESSOR_INPUT_H_
diff --git a/gfx/angle/src/compiler/preprocessor/Lexer.cpp b/gfx/angle/src/compiler/preprocessor/Lexer.cpp
new file mode 100755
index 000000000..89cb3cf44
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/Lexer.cpp
@@ -0,0 +1,16 @@
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "compiler/preprocessor/Lexer.h"
+
+namespace pp
+{
+
+Lexer::~Lexer()
+{
+}
+
+}  // namespace pp
diff --git a/gfx/angle/src/compiler/preprocessor/Lexer.h b/gfx/angle/src/compiler/preprocessor/Lexer.h
new file mode 100755
index 000000000..775bc0a20
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/Lexer.h
@@ -0,0 +1,27 @@
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_PREPROCESSOR_LEXER_H_
+#define COMPILER_PREPROCESSOR_LEXER_H_
+
+#include "common/angleutils.h"
+
+namespace pp
+{
+
+struct Token;
+
+class Lexer : angle::NonCopyable
+{
+  public:
+    virtual ~Lexer();
+
+    virtual void lex(Token *token) = 0;
+};
+
+}  // namespace pp
+
+#endif  // COMPILER_PREPROCESSOR_LEXER_H_
diff --git a/gfx/angle/src/compiler/preprocessor/Macro.cpp b/gfx/angle/src/compiler/preprocessor/Macro.cpp
new file mode 100755
index 000000000..f5c94399d
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/Macro.cpp
@@ -0,0 +1,39 @@
+//
+// Copyright (c) 2011 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "compiler/preprocessor/Macro.h"
+
+#include "common/angleutils.h"
+#include "compiler/preprocessor/Token.h"
+
+namespace pp
+{
+
+bool Macro::equals(const Macro &other) const
+{
+    return (type == other.type) &&
+           (name == other.name) &&
+           (parameters == other.parameters) &&
+           (replacements == other.replacements);
+}
+
+void PredefineMacro(MacroSet *macroSet, const char *name, int value)
+{
+    Token token;
+    token.type = Token::CONST_INT;
+    token.text = ToString(value);
+
+    Macro macro;
+    macro.predefined = true;
+    macro.type       = Macro::kTypeObj;
+    macro.name = name;
+    macro.replacements.push_back(token);
+
+    (*macroSet)[name] = macro;
+}
+
+}  // namespace pp
+
diff --git a/gfx/angle/src/compiler/preprocessor/Macro.h b/gfx/angle/src/compiler/preprocessor/Macro.h
new file mode 100755
index 000000000..557df163c
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/Macro.h
@@ -0,0 +1,48 @@
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_PREPROCESSOR_MACRO_H_
+#define COMPILER_PREPROCESSOR_MACRO_H_
+
+#include <map>
+#include <string>
+#include <vector>
+
+namespace pp
+{
+
+struct Token;
+
+struct Macro
+{
+    enum Type
+    {
+        kTypeObj,
+        kTypeFunc
+    };
+    typedef std::vector<std::string> Parameters;
+    typedef std::vector<Token> Replacements;
+
+    Macro() : predefined(false), disabled(false), expansionCount(0), type(kTypeObj) {}
+    bool equals(const Macro &other) const;
+
+    bool predefined;
+    mutable bool disabled;
+    mutable int expansionCount;
+
+    Type type;
+    std::string name;
+    Parameters parameters;
+    Replacements replacements;
+};
+
+typedef std::map<std::string, Macro> MacroSet;
+
+void PredefineMacro(MacroSet *macroSet, const char *name, int value);
+
+}  // namespace pp
+
+#endif  // COMPILER_PREPROCESSOR_MACRO_H_
diff --git a/gfx/angle/src/compiler/preprocessor/MacroExpander.cpp b/gfx/angle/src/compiler/preprocessor/MacroExpander.cpp
new file mode 100755
index 000000000..2f854f5a6
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/MacroExpander.cpp
@@ -0,0 +1,465 @@
+//
+// Copyright (c) 2011 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "compiler/preprocessor/MacroExpander.h"
+
+#include <algorithm>
+
+#include "common/debug.h"
+#include "compiler/preprocessor/DiagnosticsBase.h"
+#include "compiler/preprocessor/Token.h"
+
+namespace pp
+{
+
+namespace
+{
+
+const size_t kMaxContextTokens = 10000;
+
+class TokenLexer : public Lexer
+{
+ public:
+    typedef std::vector<Token> TokenVector;
+
+    TokenLexer(TokenVector *tokens)
+    {
+        tokens->swap(mTokens);
+        mIter = mTokens.begin();
+    }
+
+    void lex(Token *token) override
+    {
+        if (mIter == mTokens.end())
+        {
+            token->reset();
+            token->type = Token::LAST;
+        }
+        else
+        {
+            *token = *mIter++;
+        }
+    }
+
+ private:
+    TokenVector mTokens;
+    TokenVector::const_iterator mIter;
+};
+
+}  // anonymous namespace
+
+class MacroExpander::ScopedMacroReenabler final : angle::NonCopyable
+{
+  public:
+    ScopedMacroReenabler(MacroExpander *expander);
+    ~ScopedMacroReenabler();
+
+  private:
+    MacroExpander *mExpander;
+};
+
+MacroExpander::ScopedMacroReenabler::ScopedMacroReenabler(MacroExpander *expander)
+    : mExpander(expander)
+{
+    mExpander->mDeferReenablingMacros = true;
+}
+
+MacroExpander::ScopedMacroReenabler::~ScopedMacroReenabler()
+{
+    mExpander->mDeferReenablingMacros = false;
+    for (auto *macro : mExpander->mMacrosToReenable)
+    {
+        macro->disabled = false;
+    }
+    mExpander->mMacrosToReenable.clear();
+}
+
+MacroExpander::MacroExpander(Lexer *lexer, MacroSet *macroSet, Diagnostics *diagnostics)
+    : mLexer(lexer),
+      mMacroSet(macroSet),
+      mDiagnostics(diagnostics),
+      mTotalTokensInContexts(0),
+      mDeferReenablingMacros(false)
+{
+}
+
+MacroExpander::~MacroExpander()
+{
+    for (MacroContext *context : mContextStack)
+    {
+        delete context;
+    }
+}
+
+void MacroExpander::lex(Token *token)
+{
+    while (true)
+    {
+        getToken(token);
+
+        if (token->type != Token::IDENTIFIER)
+            break;
+
+        if (token->expansionDisabled())
+            break;
+
+        MacroSet::const_iterator iter = mMacroSet->find(token->text);
+        if (iter == mMacroSet->end())
+            break;
+
+        const Macro& macro = iter->second;
+        if (macro.disabled)
+        {
+            // If a particular token is not expanded, it is never expanded.
+            token->setExpansionDisabled(true);
+            break;
+        }
+
+        // Bump the expansion count before peeking if the next token is a '('
+        // otherwise there could be a #undef of the macro before the next token.
+        macro.expansionCount++;
+        if ((macro.type == Macro::kTypeFunc) && !isNextTokenLeftParen())
+        {
+            // If the token immediately after the macro name is not a '(',
+            // this macro should not be expanded.
+            macro.expansionCount--;
+            break;
+        }
+
+        pushMacro(macro, *token);
+    }
+}
+
+void MacroExpander::getToken(Token *token)
+{
+    if (mReserveToken.get())
+    {
+        *token = *mReserveToken;
+        mReserveToken.reset();
+        return;
+    }
+
+    // First pop all empty macro contexts.
+    while (!mContextStack.empty() && mContextStack.back()->empty())
+    {
+        popMacro();
+    }
+
+    if (!mContextStack.empty())
+    {
+        *token = mContextStack.back()->get();
+    }
+    else
+    {
+        ASSERT(mTotalTokensInContexts == 0);
+        mLexer->lex(token);
+    }
+}
+
+void MacroExpander::ungetToken(const Token &token)
+{
+    if (!mContextStack.empty())
+    {
+        MacroContext *context = mContextStack.back();
+        context->unget();
+        ASSERT(context->replacements[context->index] == token);
+    }
+    else
+    {
+        ASSERT(!mReserveToken.get());
+        mReserveToken.reset(new Token(token));
+    }
+}
+
+bool MacroExpander::isNextTokenLeftParen()
+{
+    Token token;
+    getToken(&token);
+
+    bool lparen = token.type == '(';
+    ungetToken(token);
+
+    return lparen;
+}
+
+bool MacroExpander::pushMacro(const Macro &macro, const Token &identifier)
+{
+    ASSERT(!macro.disabled);
+    ASSERT(!identifier.expansionDisabled());
+    ASSERT(identifier.type == Token::IDENTIFIER);
+    ASSERT(identifier.text == macro.name);
+
+    std::vector<Token> replacements;
+    if (!expandMacro(macro, identifier, &replacements))
+        return false;
+
+    // Macro is disabled for expansion until it is popped off the stack.
+    macro.disabled = true;
+
+    MacroContext *context = new MacroContext;
+    context->macro = &macro;
+    context->replacements.swap(replacements);
+    mContextStack.push_back(context);
+    mTotalTokensInContexts += context->replacements.size();
+    return true;
+}
+
+void MacroExpander::popMacro()
+{
+    ASSERT(!mContextStack.empty());
+
+    MacroContext *context = mContextStack.back();
+    mContextStack.pop_back();
+
+    ASSERT(context->empty());
+    ASSERT(context->macro->disabled);
+    ASSERT(context->macro->expansionCount > 0);
+    if (mDeferReenablingMacros)
+    {
+        mMacrosToReenable.push_back(context->macro);
+    }
+    else
+    {
+        context->macro->disabled = false;
+    }
+    context->macro->expansionCount--;
+    mTotalTokensInContexts -= context->replacements.size();
+    delete context;
+}
+
+bool MacroExpander::expandMacro(const Macro &macro,
+                                const Token &identifier,
+                                std::vector<Token> *replacements)
+{
+    replacements->clear();
+
+    // In the case of an object-like macro, the replacement list gets its location
+    // from the identifier, but in the case of a function-like macro, the replacement
+    // list gets its location from the closing parenthesis of the macro invocation.
+    // This is tested by dEQP-GLES3.functional.shaders.preprocessor.predefined_macros.*
+    SourceLocation replacementLocation = identifier.location;
+    if (macro.type == Macro::kTypeObj)
+    {
+        replacements->assign(macro.replacements.begin(),
+                             macro.replacements.end());
+
+        if (macro.predefined)
+        {
+            const char kLine[] = "__LINE__";
+            const char kFile[] = "__FILE__";
+
+            ASSERT(replacements->size() == 1);
+            Token& repl = replacements->front();
+            if (macro.name == kLine)
+            {
+                repl.text = ToString(identifier.location.line);
+            }
+            else if (macro.name == kFile)
+            {
+                repl.text = ToString(identifier.location.file);
+            }
+        }
+    }
+    else
+    {
+        ASSERT(macro.type == Macro::kTypeFunc);
+        std::vector<MacroArg> args;
+        args.reserve(macro.parameters.size());
+        if (!collectMacroArgs(macro, identifier, &args, &replacementLocation))
+            return false;
+
+        replaceMacroParams(macro, args, replacements);
+    }
+
+    for (std::size_t i = 0; i < replacements->size(); ++i)
+    {
+        Token& repl = replacements->at(i);
+        if (i == 0)
+        {
+            // The first token in the replacement list inherits the padding
+            // properties of the identifier token.
+            repl.setAtStartOfLine(identifier.atStartOfLine());
+            repl.setHasLeadingSpace(identifier.hasLeadingSpace());
+        }
+        repl.location = replacementLocation;
+    }
+    return true;
+}
+
+bool MacroExpander::collectMacroArgs(const Macro &macro,
+                                     const Token &identifier,
+                                     std::vector<MacroArg> *args,
+                                     SourceLocation *closingParenthesisLocation)
+{
+    Token token;
+    getToken(&token);
+    ASSERT(token.type == '(');
+
+    args->push_back(MacroArg());
+
+    // Defer reenabling macros until args collection is finished to avoid the possibility of
+    // infinite recursion. Otherwise infinite recursion might happen when expanding the args after
+    // macros have been popped from the context stack when parsing the args.
+    ScopedMacroReenabler deferReenablingMacros(this);
+
+    int openParens = 1;
+    while (openParens != 0)
+    {
+        getToken(&token);
+
+        if (token.type == Token::LAST)
+        {
+            mDiagnostics->report(Diagnostics::PP_MACRO_UNTERMINATED_INVOCATION,
+                                 identifier.location, identifier.text);
+            // Do not lose EOF token.
+            ungetToken(token);
+            return false;
+        }
+
+        bool isArg = false; // True if token is part of the current argument.
+        switch (token.type)
+        {
+          case '(':
+            ++openParens;
+            isArg = true;
+            break;
+          case ')':
+            --openParens;
+            isArg = openParens != 0;
+            *closingParenthesisLocation = token.location;
+            break;
+          case ',':
+            // The individual arguments are separated by comma tokens, but
+            // the comma tokens between matching inner parentheses do not
+            // seperate arguments.
+            if (openParens == 1)
+                args->push_back(MacroArg());
+            isArg = openParens != 1;
+            break;
+          default:
+            isArg = true;
+            break;
+        }
+        if (isArg)
+        {
+            MacroArg &arg = args->back();
+            // Initial whitespace is not part of the argument.
+            if (arg.empty())
+                token.setHasLeadingSpace(false);
+            arg.push_back(token);
+        }
+    }
+
+    const Macro::Parameters &params = macro.parameters;
+    // If there is only one empty argument, it is equivalent to no argument.
+    if (params.empty() && (args->size() == 1) && args->front().empty())
+    {
+        args->clear();
+    }
+    // Validate the number of arguments.
+    if (args->size() != params.size())
+    {
+        Diagnostics::ID id = args->size() < macro.parameters.size() ?
+            Diagnostics::PP_MACRO_TOO_FEW_ARGS :
+            Diagnostics::PP_MACRO_TOO_MANY_ARGS;
+        mDiagnostics->report(id, identifier.location, identifier.text);
+        return false;
+    }
+
+    // Pre-expand each argument before substitution.
+    // This step expands each argument individually before they are
+    // inserted into the macro body.
+    size_t numTokens = 0;
+    for (auto &arg : *args)
+    {
+        TokenLexer lexer(&arg);
+        MacroExpander expander(&lexer, mMacroSet, mDiagnostics);
+
+        arg.clear();
+        expander.lex(&token);
+        while (token.type != Token::LAST)
+        {
+            arg.push_back(token);
+            expander.lex(&token);
+            numTokens++;
+            if (numTokens + mTotalTokensInContexts > kMaxContextTokens)
+            {
+                mDiagnostics->report(Diagnostics::PP_OUT_OF_MEMORY, token.location, token.text);
+                return false;
+            }
+        }
+    }
+    return true;
+}
+
+void MacroExpander::replaceMacroParams(const Macro &macro,
+                                       const std::vector<MacroArg> &args,
+                                       std::vector<Token> *replacements)
+{
+    for (std::size_t i = 0; i < macro.replacements.size(); ++i)
+    {
+        if (!replacements->empty() &&
+            replacements->size() + mTotalTokensInContexts > kMaxContextTokens)
+        {
+            const Token &token = replacements->back();
+            mDiagnostics->report(Diagnostics::PP_OUT_OF_MEMORY, token.location, token.text);
+            return;
+        }
+
+        const Token &repl = macro.replacements[i];
+        if (repl.type != Token::IDENTIFIER)
+        {
+            replacements->push_back(repl);
+            continue;
+        }
+
+        // TODO(alokp): Optimize this.
+        // There is no need to search for macro params every time.
+        // The param index can be cached with the replacement token.
+        Macro::Parameters::const_iterator iter = std::find(
+            macro.parameters.begin(), macro.parameters.end(), repl.text);
+        if (iter == macro.parameters.end())
+        {
+            replacements->push_back(repl);
+            continue;
+        }
+
+        std::size_t iArg = std::distance(macro.parameters.begin(), iter);
+        const MacroArg &arg = args[iArg];
+        if (arg.empty())
+        {
+            continue;
+        }
+        std::size_t iRepl = replacements->size();
+        replacements->insert(replacements->end(), arg.begin(), arg.end());
+        // The replacement token inherits padding properties from
+        // macro replacement token.
+        replacements->at(iRepl).setHasLeadingSpace(repl.hasLeadingSpace());
+    }
+}
+
+MacroExpander::MacroContext::MacroContext() : macro(0), index(0)
+{
+}
+
+bool MacroExpander::MacroContext::empty() const
+{
+    return index == replacements.size();
+}
+
+const Token &MacroExpander::MacroContext::get()
+{
+    return replacements[index++];
+}
+
+void MacroExpander::MacroContext::unget()
+{
+    ASSERT(index > 0);
+    --index;
+}
+
+}  // namespace pp
+
diff --git a/gfx/angle/src/compiler/preprocessor/MacroExpander.h b/gfx/angle/src/compiler/preprocessor/MacroExpander.h
new file mode 100755
index 000000000..3a8450f5e
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/MacroExpander.h
@@ -0,0 +1,79 @@
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_PREPROCESSOR_MACROEXPANDER_H_
+#define COMPILER_PREPROCESSOR_MACROEXPANDER_H_
+
+#include <memory>
+#include <vector>
+
+#include "compiler/preprocessor/Lexer.h"
+#include "compiler/preprocessor/Macro.h"
+
+namespace pp
+{
+
+class Diagnostics;
+struct SourceLocation;
+
+class MacroExpander : public Lexer
+{
+  public:
+    MacroExpander(Lexer *lexer, MacroSet *macroSet, Diagnostics *diagnostics);
+    ~MacroExpander() override;
+
+    void lex(Token *token) override;
+
+  private:
+    void getToken(Token *token);
+    void ungetToken(const Token &token);
+    bool isNextTokenLeftParen();
+
+    bool pushMacro(const Macro &macro, const Token &identifier);
+    void popMacro();
+
+    bool expandMacro(const Macro &macro,
+                     const Token &identifier,
+                     std::vector<Token> *replacements);
+
+    typedef std::vector<Token> MacroArg;
+    bool collectMacroArgs(const Macro &macro,
+                          const Token &identifier,
+                          std::vector<MacroArg> *args,
+                          SourceLocation *closingParenthesisLocation);
+    void replaceMacroParams(const Macro &macro,
+                            const std::vector<MacroArg> &args,
+                            std::vector<Token> *replacements);
+
+    struct MacroContext
+    {
+        MacroContext();
+        bool empty() const;
+        const Token &get();
+        void unget();
+
+        const Macro *macro;
+        std::size_t index;
+        std::vector<Token> replacements;
+    };
+
+    Lexer *mLexer;
+    MacroSet *mMacroSet;
+    Diagnostics *mDiagnostics;
+
+    std::unique_ptr<Token> mReserveToken;
+    std::vector<MacroContext *> mContextStack;
+    size_t mTotalTokensInContexts;
+
+    bool mDeferReenablingMacros;
+    std::vector<const Macro *> mMacrosToReenable;
+
+    class ScopedMacroReenabler;
+};
+
+}  // namespace pp
+
+#endif  // COMPILER_PREPROCESSOR_MACROEXPANDER_H_
diff --git a/gfx/angle/src/compiler/preprocessor/Preprocessor.cpp b/gfx/angle/src/compiler/preprocessor/Preprocessor.cpp
new file mode 100755
index 000000000..1709d6673
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/Preprocessor.cpp
@@ -0,0 +1,102 @@
+//
+// Copyright (c) 2011 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "compiler/preprocessor/Preprocessor.h"
+
+#include "common/debug.h"
+#include "compiler/preprocessor/DiagnosticsBase.h"
+#include "compiler/preprocessor/DirectiveParser.h"
+#include "compiler/preprocessor/Macro.h"
+#include "compiler/preprocessor/MacroExpander.h"
+#include "compiler/preprocessor/Token.h"
+#include "compiler/preprocessor/Tokenizer.h"
+
+namespace pp
+{
+
+struct PreprocessorImpl
+{
+    Diagnostics *diagnostics;
+    MacroSet macroSet;
+    Tokenizer tokenizer;
+    DirectiveParser directiveParser;
+    MacroExpander macroExpander;
+
+    PreprocessorImpl(Diagnostics *diag, DirectiveHandler *directiveHandler)
+        : diagnostics(diag),
+          tokenizer(diag),
+          directiveParser(&tokenizer, &macroSet, diag, directiveHandler),
+          macroExpander(&directiveParser, &macroSet, diag)
+    {
+    }
+};
+
+Preprocessor::Preprocessor(Diagnostics *diagnostics,
+                           DirectiveHandler *directiveHandler)
+{
+    mImpl = new PreprocessorImpl(diagnostics, directiveHandler);
+}
+
+Preprocessor::~Preprocessor()
+{
+    delete mImpl;
+}
+
+bool Preprocessor::init(size_t count,
+                        const char * const string[],
+                        const int length[])
+{
+    static const int kDefaultGLSLVersion = 100;
+
+    // Add standard pre-defined macros.
+    predefineMacro("__LINE__", 0);
+    predefineMacro("__FILE__", 0);
+    predefineMacro("__VERSION__", kDefaultGLSLVersion);
+    predefineMacro("GL_ES", 1);
+
+    return mImpl->tokenizer.init(count, string, length);
+}
+
+void Preprocessor::predefineMacro(const char *name, int value)
+{
+    PredefineMacro(&mImpl->macroSet, name, value);
+}
+
+void Preprocessor::lex(Token *token)
+{
+    bool validToken = false;
+    while (!validToken)
+    {
+        mImpl->macroExpander.lex(token);
+        switch (token->type)
+        {
+          // We should not be returning internal preprocessing tokens.
+          // Convert preprocessing tokens to compiler tokens or report
+          // diagnostics.
+          case Token::PP_HASH:
+              UNREACHABLE();
+              break;
+          case Token::PP_NUMBER:
+            mImpl->diagnostics->report(Diagnostics::PP_INVALID_NUMBER,
+                                       token->location, token->text);
+            break;
+          case Token::PP_OTHER:
+            mImpl->diagnostics->report(Diagnostics::PP_INVALID_CHARACTER,
+                                       token->location, token->text);
+            break;
+          default:
+            validToken = true;
+            break;
+        }
+    }
+}
+
+void Preprocessor::setMaxTokenSize(size_t maxTokenSize)
+{
+    mImpl->tokenizer.setMaxTokenSize(maxTokenSize);
+}
+
+}  // namespace pp
diff --git a/gfx/angle/src/compiler/preprocessor/Preprocessor.h b/gfx/angle/src/compiler/preprocessor/Preprocessor.h
new file mode 100755
index 000000000..cd699786f
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/Preprocessor.h
@@ -0,0 +1,52 @@
+//
+// Copyright (c) 2011 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_PREPROCESSOR_PREPROCESSOR_H_
+#define COMPILER_PREPROCESSOR_PREPROCESSOR_H_
+
+#include <cstddef>
+
+#include "common/angleutils.h"
+
+namespace pp
+{
+
+class Diagnostics;
+class DirectiveHandler;
+struct PreprocessorImpl;
+struct Token;
+
+class Preprocessor : angle::NonCopyable
+{
+  public:
+    Preprocessor(Diagnostics *diagnostics, DirectiveHandler *directiveHandler);
+    ~Preprocessor();
+
+    // count: specifies the number of elements in the string and length arrays.
+    // string: specifies an array of pointers to strings.
+    // length: specifies an array of string lengths.
+    // If length is NULL, each string is assumed to be null terminated.
+    // If length is a value other than NULL, it points to an array containing
+    // a string length for each of the corresponding elements of string.
+    // Each element in the length array may contain the length of the
+    // corresponding string or a value less than 0 to indicate that the string
+    // is null terminated.
+    bool init(size_t count, const char * const string[], const int length[]);
+    // Adds a pre-defined macro.
+    void predefineMacro(const char *name, int value);
+
+    void lex(Token *token);
+
+    // Set maximum preprocessor token size
+    void setMaxTokenSize(size_t maxTokenSize);
+
+  private:
+    PreprocessorImpl *mImpl;
+};
+
+}  // namespace pp
+
+#endif  // COMPILER_PREPROCESSOR_PREPROCESSOR_H_
diff --git a/gfx/angle/src/compiler/preprocessor/SourceLocation.h b/gfx/angle/src/compiler/preprocessor/SourceLocation.h
new file mode 100755
index 000000000..af8a8d5d1
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/SourceLocation.h
@@ -0,0 +1,47 @@
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_PREPROCESSOR_SOURCELOCATION_H_
+#define COMPILER_PREPROCESSOR_SOURCELOCATION_H_
+
+namespace pp
+{
+
+struct SourceLocation
+{
+    SourceLocation()
+        : file(0),
+          line(0)
+    {
+    }
+    SourceLocation(int f, int l)
+        : file(f),
+          line(l)
+    {
+    }
+
+    bool equals(const SourceLocation &other) const
+    {
+        return (file == other.file) && (line == other.line);
+    }
+
+    int file;
+    int line;
+};
+
+inline bool operator==(const SourceLocation &lhs, const SourceLocation &rhs)
+{
+    return lhs.equals(rhs);
+}
+
+inline bool operator!=(const SourceLocation &lhs, const SourceLocation &rhs)
+{
+    return !lhs.equals(rhs);
+}
+
+}  // namespace pp
+
+#endif  // COMPILER_PREPROCESSOR_SOURCELOCATION_H_
diff --git a/gfx/angle/src/compiler/preprocessor/Token.cpp b/gfx/angle/src/compiler/preprocessor/Token.cpp
new file mode 100755
index 000000000..41610a402
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/Token.cpp
@@ -0,0 +1,82 @@
+//
+// Copyright (c) 2011 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "compiler/preprocessor/Token.h"
+
+#include "common/debug.h"
+#include "compiler/preprocessor/numeric_lex.h"
+
+namespace pp
+{
+
+void Token::reset()
+{
+    type = 0;
+    flags = 0;
+    location = SourceLocation();
+    text.clear();
+}
+
+bool Token::equals(const Token &other) const
+{
+    return (type == other.type) &&
+           (flags == other.flags) &&
+           (location == other.location) &&
+           (text == other.text);
+}
+
+void Token::setAtStartOfLine(bool start)
+{
+    if (start)
+        flags |= AT_START_OF_LINE;
+    else
+        flags &= ~AT_START_OF_LINE;
+}
+
+void Token::setHasLeadingSpace(bool space)
+{
+    if (space)
+        flags |= HAS_LEADING_SPACE;
+    else
+        flags &= ~HAS_LEADING_SPACE;
+}
+
+void Token::setExpansionDisabled(bool disable)
+{
+    if (disable)
+        flags |= EXPANSION_DISABLED;
+    else
+        flags &= ~EXPANSION_DISABLED;
+}
+
+bool Token::iValue(int *value) const
+{
+    ASSERT(type == CONST_INT);
+    return numeric_lex_int(text, value);
+}
+
+bool Token::uValue(unsigned int *value) const
+{
+    ASSERT(type == CONST_INT);
+    return numeric_lex_int(text, value);
+}
+
+bool Token::fValue(float *value) const
+{
+    ASSERT(type == CONST_FLOAT);
+    return numeric_lex_float(text, value);
+}
+
+std::ostream &operator<<(std::ostream &out, const Token &token)
+{
+    if (token.hasLeadingSpace())
+        out << " ";
+
+    out << token.text;
+    return out;
+}
+
+}  // namespace pp
diff --git a/gfx/angle/src/compiler/preprocessor/Token.h b/gfx/angle/src/compiler/preprocessor/Token.h
new file mode 100755
index 000000000..716503b32
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/Token.h
@@ -0,0 +1,120 @@
+//
+// Copyright (c) 2011 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_PREPROCESSOR_TOKEN_H_
+#define COMPILER_PREPROCESSOR_TOKEN_H_
+
+#include <ostream>
+#include <string>
+
+#include "compiler/preprocessor/SourceLocation.h"
+
+namespace pp
+{
+
+struct Token
+{
+    enum Type
+    {
+        LAST = 0,  // EOF.
+
+        IDENTIFIER = 258,
+
+        CONST_INT,
+        CONST_FLOAT,
+
+        OP_INC,
+        OP_DEC,
+        OP_LEFT,
+        OP_RIGHT,
+        OP_LE,
+        OP_GE,
+        OP_EQ,
+        OP_NE,
+        OP_AND,
+        OP_XOR,
+        OP_OR,
+        OP_ADD_ASSIGN,
+        OP_SUB_ASSIGN,
+        OP_MUL_ASSIGN,
+        OP_DIV_ASSIGN,
+        OP_MOD_ASSIGN,
+        OP_LEFT_ASSIGN,
+        OP_RIGHT_ASSIGN,
+        OP_AND_ASSIGN,
+        OP_XOR_ASSIGN,
+        OP_OR_ASSIGN,
+
+        // Preprocessing token types.
+        // These types are used by the preprocessor internally.
+        // Preprocessor clients must not depend or check for them.
+        PP_HASH,
+        PP_NUMBER,
+        PP_OTHER
+    };
+    enum Flags
+    {
+        AT_START_OF_LINE   = 1 << 0,
+        HAS_LEADING_SPACE  = 1 << 1,
+        EXPANSION_DISABLED = 1 << 2
+    };
+
+    Token()
+        : type(0),
+          flags(0)
+    {
+    }
+
+    void reset();
+    bool equals(const Token &other) const;
+
+    // Returns true if this is the first token on line.
+    // It disregards any leading whitespace.
+    bool atStartOfLine() const
+    {
+        return (flags & AT_START_OF_LINE) != 0;
+    }
+    void setAtStartOfLine(bool start);
+
+    bool hasLeadingSpace() const
+    {
+        return (flags & HAS_LEADING_SPACE) != 0;
+    }
+    void setHasLeadingSpace(bool space);
+
+    bool expansionDisabled() const
+    {
+        return (flags & EXPANSION_DISABLED) != 0;
+    }
+    void setExpansionDisabled(bool disable);
+
+    // Converts text into numeric value for CONST_INT and CONST_FLOAT token.
+    // Returns false if the parsed value cannot fit into an int or float.
+    bool iValue(int *value) const;
+    bool uValue(unsigned int *value) const;
+    bool fValue(float *value) const;
+
+    int type;
+    unsigned int flags;
+    SourceLocation location;
+    std::string text;
+};
+
+inline bool operator==(const Token &lhs, const Token &rhs)
+{
+    return lhs.equals(rhs);
+}
+
+inline bool operator!=(const Token &lhs, const Token &rhs)
+{
+    return !lhs.equals(rhs);
+}
+
+std::ostream &operator<<(std::ostream &out, const Token &token);
+
+}  // namepsace pp
+
+#endif  // COMPILER_PREPROCESSOR_TOKEN_H_
diff --git a/gfx/angle/src/compiler/preprocessor/Tokenizer.cpp b/gfx/angle/src/compiler/preprocessor/Tokenizer.cpp
new file mode 100755
index 000000000..40e910e22
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/Tokenizer.cpp
@@ -0,0 +1,2872 @@
+#line 16 "./Tokenizer.l"
+//
+// Copyright (c) 2011-2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// This file is auto-generated by generate_parser.sh. DO NOT EDIT!
+
+
+
+#define  YY_INT_ALIGNED short int
+
+/* A lexical scanner generated by flex */
+
+
+
+
+
+
+
+
+
+
+
+#define FLEX_SCANNER
+#define YY_FLEX_MAJOR_VERSION 2
+#define YY_FLEX_MINOR_VERSION 6
+#define YY_FLEX_SUBMINOR_VERSION 1
+#if YY_FLEX_SUBMINOR_VERSION > 0
+#define FLEX_BETA
+#endif
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+    
+        
+        
+    
+    
+
+
+    
+    
+
+
+
+    
+    
+
+
+
+    
+    
+    
+
+
+
+
+
+
+/* First, we deal with  platform-specific or compiler-specific issues. */
+
+/* begin standard C headers. */
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <stdlib.h>
+
+/* end standard C headers. */
+
+/* flex integer type definitions */
+
+#ifndef FLEXINT_H
+#define FLEXINT_H
+
+/* C99 systems have <inttypes.h>. Non-C99 systems may or may not. */
+
+#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
+
+/* C99 says to define __STDC_LIMIT_MACROS before including stdint.h,
+ * if you want the limit (max/min) macros for int types. 
+ */
+#ifndef __STDC_LIMIT_MACROS
+#define __STDC_LIMIT_MACROS 1
+#endif
+
+#include <inttypes.h>
+typedef int8_t flex_int8_t;
+typedef uint8_t flex_uint8_t;
+typedef int16_t flex_int16_t;
+typedef uint16_t flex_uint16_t;
+typedef int32_t flex_int32_t;
+typedef uint32_t flex_uint32_t;
+#else
+typedef signed char flex_int8_t;
+typedef short int flex_int16_t;
+typedef int flex_int32_t;
+typedef unsigned char flex_uint8_t; 
+typedef unsigned short int flex_uint16_t;
+typedef unsigned int flex_uint32_t;
+
+/* Limits of integral types. */
+#ifndef INT8_MIN
+#define INT8_MIN               (-128)
+#endif
+#ifndef INT16_MIN
+#define INT16_MIN              (-32767-1)
+#endif
+#ifndef INT32_MIN
+#define INT32_MIN              (-2147483647-1)
+#endif
+#ifndef INT8_MAX
+#define INT8_MAX               (127)
+#endif
+#ifndef INT16_MAX
+#define INT16_MAX              (32767)
+#endif
+#ifndef INT32_MAX
+#define INT32_MAX              (2147483647)
+#endif
+#ifndef UINT8_MAX
+#define UINT8_MAX              (255U)
+#endif
+#ifndef UINT16_MAX
+#define UINT16_MAX             (65535U)
+#endif
+#ifndef UINT32_MAX
+#define UINT32_MAX             (4294967295U)
+#endif
+
+#endif /* ! C99 */
+
+#endif /* ! FLEXINT_H */
+
+
+
+/* TODO: this is always defined, so inline it */
+#define yyconst const
+
+#if defined(__GNUC__) && __GNUC__ >= 3
+#define yynoreturn __attribute__((__noreturn__))
+#else
+#define yynoreturn
+#endif
+
+
+    
+
+
+
+/* Returned upon end-of-file. */
+#define YY_NULL 0
+
+
+
+/* Promotes a possibly negative, possibly signed char to an unsigned
+ * integer for use as an array index.  If the signed char is negative,
+ * we want to instead treat it as an 8-bit unsigned char, hence the
+ * double cast.
+ */
+#define YY_SC_TO_UI(c) ((unsigned int) (unsigned char) c)
+
+
+
+
+
+/* An opaque pointer. */
+#ifndef YY_TYPEDEF_YY_SCANNER_T
+#define YY_TYPEDEF_YY_SCANNER_T
+typedef void* yyscan_t;
+#endif
+
+
+
+
+
+
+
+
+
+    
+    
+
+
+
+
+
+
+
+
+/* For convenience, these vars (plus the bison vars far below)
+   are macros in the reentrant scanner. */
+#define yyin yyg->yyin_r
+#define yyout yyg->yyout_r
+#define yyextra yyg->yyextra_r
+#define yyleng yyg->yyleng_r
+#define yytext yyg->yytext_r
+#define yylineno (YY_CURRENT_BUFFER_LVALUE->yy_bs_lineno)
+#define yycolumn (YY_CURRENT_BUFFER_LVALUE->yy_bs_column)
+#define yy_flex_debug yyg->yy_flex_debug_r
+
+
+
+
+
+
+
+
+
+    
+    
+    
+    
+
+
+
+/* Enter a start condition.  This macro really ought to take a parameter,
+ * but we do it the disgusting crufty way forced on us by the ()-less
+ * definition of BEGIN.
+ */
+#define BEGIN yyg->yy_start = 1 + 2 *
+
+
+
+/* Translate the current start state into a value that can be later handed
+ * to BEGIN to return to the state.  The YYSTATE alias is for lex
+ * compatibility.
+ */
+#define YY_START ((yyg->yy_start - 1) / 2)
+#define YYSTATE YY_START
+
+
+
+/* Action number for EOF rule of a given start state. */
+#define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1)
+
+
+
+/* Special action meaning "start processing a new file". */
+#define YY_NEW_FILE pprestart(yyin ,yyscanner )
+
+
+
+#define YY_END_OF_BUFFER_CHAR 0
+
+
+/* Size of default input buffer. */
+#ifndef YY_BUF_SIZE
+#ifdef __ia64__
+/* On IA-64, the buffer size is 16k, not 8k.
+ * Moreover, YY_BUF_SIZE is 2*YY_READ_BUF_SIZE in the general case.
+ * Ditto for the __ia64__ case accordingly.
+ */
+#define YY_BUF_SIZE 32768
+#else
+#define YY_BUF_SIZE 16384
+#endif /* __ia64__ */
+#endif
+
+
+/* The state buf must be large enough to hold one state per character in the main buffer.
+ */
+#define YY_STATE_BUF_SIZE   ((YY_BUF_SIZE + 2) * sizeof(yy_state_type))
+
+
+
+#ifndef YY_TYPEDEF_YY_BUFFER_STATE
+#define YY_TYPEDEF_YY_BUFFER_STATE
+typedef struct yy_buffer_state *YY_BUFFER_STATE;
+#endif
+
+#ifndef YY_TYPEDEF_YY_SIZE_T
+#define YY_TYPEDEF_YY_SIZE_T
+typedef size_t yy_size_t;
+#endif
+
+
+
+
+#define EOB_ACT_CONTINUE_SCAN 0
+#define EOB_ACT_END_OF_FILE 1
+#define EOB_ACT_LAST_MATCH 2
+
+
+
+    
+    #define YY_LESS_LINENO(n)
+    #define YY_LINENO_REWIND_TO(ptr)
+    
+
+
+
+/* Return all but the first "n" matched characters back to the input stream. */
+#define yyless(n) \
+	do \
+		{ \
+		/* Undo effects of setting up yytext. */ \
+        int yyless_macro_arg = (n); \
+        YY_LESS_LINENO(yyless_macro_arg);\
+		*yy_cp = yyg->yy_hold_char; \
+		YY_RESTORE_YY_MORE_OFFSET \
+		yyg->yy_c_buf_p = yy_cp = yy_bp + yyless_macro_arg - YY_MORE_ADJ; \
+		YY_DO_BEFORE_ACTION; /* set up yytext again */ \
+		} \
+	while ( 0 )
+
+
+
+#define unput(c) yyunput( c, yyg->yytext_ptr , yyscanner )
+
+
+#ifndef YY_STRUCT_YY_BUFFER_STATE
+#define YY_STRUCT_YY_BUFFER_STATE
+struct yy_buffer_state
+	{
+	FILE *yy_input_file;
+
+
+
+	char *yy_ch_buf;		/* input buffer */
+	char *yy_buf_pos;		/* current position in input buffer */
+
+	/* Size of input buffer in bytes, not including room for EOB
+	 * characters.
+	 */
+	int yy_buf_size;
+
+	/* Number of characters read into yy_ch_buf, not including EOB
+	 * characters.
+	 */
+	int yy_n_chars;
+
+	/* Whether we "own" the buffer - i.e., we know we created it,
+	 * and can realloc() it to grow it, and should free() it to
+	 * delete it.
+	 */
+	int yy_is_our_buffer;
+
+	/* Whether this is an "interactive" input source; if so, and
+	 * if we're using stdio for input, then we want to use getc()
+	 * instead of fread(), to make sure we stop fetching input after
+	 * each newline.
+	 */
+	int yy_is_interactive;
+
+	/* Whether we're considered to be at the beginning of a line.
+	 * If so, '^' rules will be active on the next match, otherwise
+	 * not.
+	 */
+	int yy_at_bol;
+
+    int yy_bs_lineno; /**< The line count. */
+    int yy_bs_column; /**< The column count. */
+    
+
+	/* Whether to try to fill the input buffer when we reach the
+	 * end of it.
+	 */
+	int yy_fill_buffer;
+
+	int yy_buffer_status;
+
+#define YY_BUFFER_NEW 0
+#define YY_BUFFER_NORMAL 1
+	/* When an EOF's been seen but there's still some text to process
+	 * then we mark the buffer as YY_EOF_PENDING, to indicate that we
+	 * shouldn't try reading from the input source any more.  We might
+	 * still have a bunch of tokens to match, though, because of
+	 * possible backing-up.
+	 *
+	 * When we actually see the EOF, we change the status to "new"
+	 * (via pprestart()), so that the user can continue scanning by
+	 * just pointing yyin at a new input file.
+	 */
+#define YY_BUFFER_EOF_PENDING 2
+
+	};
+#endif /* !YY_STRUCT_YY_BUFFER_STATE */
+
+
+
+
+
+/* We provide macros for accessing buffer states in case in the
+ * future we want to put the buffer states in a more general
+ * "scanner state".
+ *
+ * Returns the top of the stack, or NULL.
+ */
+#define YY_CURRENT_BUFFER ( yyg->yy_buffer_stack \
+                          ? yyg->yy_buffer_stack[yyg->yy_buffer_stack_top] \
+                          : NULL)
+
+
+
+/* Same as previous macro, but useful when we know that the buffer stack is not
+ * NULL or when we need an lvalue. For internal use only.
+ */
+#define YY_CURRENT_BUFFER_LVALUE yyg->yy_buffer_stack[yyg->yy_buffer_stack_top]
+
+
+
+
+
+
+void pprestart (FILE *input_file ,yyscan_t yyscanner );
+void pp_switch_to_buffer (YY_BUFFER_STATE new_buffer ,yyscan_t yyscanner );
+YY_BUFFER_STATE pp_create_buffer (FILE *file,int size ,yyscan_t yyscanner );
+void pp_delete_buffer (YY_BUFFER_STATE b ,yyscan_t yyscanner );
+void pp_flush_buffer (YY_BUFFER_STATE b ,yyscan_t yyscanner );
+void pppush_buffer_state (YY_BUFFER_STATE new_buffer ,yyscan_t yyscanner );
+void pppop_buffer_state (yyscan_t yyscanner );
+
+
+static void ppensure_buffer_stack (yyscan_t yyscanner );
+static void pp_load_buffer_state (yyscan_t yyscanner );
+static void pp_init_buffer (YY_BUFFER_STATE b,FILE *file ,yyscan_t yyscanner );
+
+
+
+#define YY_FLUSH_BUFFER pp_flush_buffer(YY_CURRENT_BUFFER ,yyscanner)
+
+
+YY_BUFFER_STATE pp_scan_buffer (char *base,yy_size_t size ,yyscan_t yyscanner );
+YY_BUFFER_STATE pp_scan_string (yyconst char *yy_str ,yyscan_t yyscanner );
+YY_BUFFER_STATE pp_scan_bytes (yyconst char *bytes,int len ,yyscan_t yyscanner );
+
+
+void *ppalloc (yy_size_t ,yyscan_t yyscanner );
+void *pprealloc (void *,yy_size_t ,yyscan_t yyscanner );
+void ppfree (void * ,yyscan_t yyscanner );
+
+
+#define yy_new_buffer pp_create_buffer
+
+
+
+#define yy_set_interactive(is_interactive) \
+	{ \
+	if ( ! YY_CURRENT_BUFFER ){ \
+        ppensure_buffer_stack (yyscanner); \
+		YY_CURRENT_BUFFER_LVALUE =    \
+            pp_create_buffer(yyin,YY_BUF_SIZE ,yyscanner); \
+	} \
+	YY_CURRENT_BUFFER_LVALUE->yy_is_interactive = is_interactive; \
+	}
+
+
+
+#define yy_set_bol(at_bol) \
+	{ \
+	if ( ! YY_CURRENT_BUFFER ){\
+        ppensure_buffer_stack (yyscanner); \
+		YY_CURRENT_BUFFER_LVALUE =    \
+            pp_create_buffer(yyin,YY_BUF_SIZE ,yyscanner); \
+	} \
+	YY_CURRENT_BUFFER_LVALUE->yy_at_bol = at_bol; \
+	}
+
+
+
+#define YY_AT_BOL() (YY_CURRENT_BUFFER_LVALUE->yy_at_bol)
+
+
+/* Begin user sect3 */
+
+#define ppwrap(yyscanner) (/*CONSTCOND*/1)
+#define YY_SKIP_YYWRAP
+
+typedef unsigned char YY_CHAR;
+
+
+
+
+typedef int yy_state_type;
+
+#define yytext_ptr yytext_r
+
+
+
+
+
+
+static yy_state_type yy_get_previous_state (yyscan_t yyscanner );
+static yy_state_type yy_try_NUL_trans (yy_state_type current_state  ,yyscan_t yyscanner);
+static int yy_get_next_buffer (yyscan_t yyscanner );
+static void yynoreturn yy_fatal_error (yyconst char* msg ,yyscan_t yyscanner );
+
+
+
+
+/* Done after the current pattern has been matched and before the
+ * corresponding action - sets up yytext.
+ */
+#define YY_DO_BEFORE_ACTION \
+	yyg->yytext_ptr = yy_bp; \
+	yyleng = (int) (yy_cp - yy_bp); \
+	yyg->yy_hold_char = *yy_cp; \
+	*yy_cp = '\0'; \
+	yyg->yy_c_buf_p = yy_cp;
+
+
+
+#define YY_NUM_RULES 38
+#define YY_END_OF_BUFFER 39
+/* This struct is not used in this scanner,
+   but its presence is necessary. */
+struct yy_trans_info
+	{
+	flex_int32_t yy_verify;
+	flex_int32_t yy_nxt;
+	};
+static yyconst flex_int16_t yy_accept[98] =
+    {   0,
+        0,    0,    0,    0,   39,   37,   34,   35,   35,   33,
+        7,   33,   33,   33,   33,   33,   33,   33,   33,    9,
+        9,   33,   33,   33,    8,   37,   33,   33,    3,    5,
+        5,    4,   34,   35,   19,   27,   20,   30,   25,   12,
+       23,   13,   24,   10,    2,    1,   26,   10,    9,   11,
+       11,   11,    9,   11,    9,    9,   14,   16,   18,   17,
+       15,    8,   36,   36,   31,   21,   32,   22,    3,    5,
+        6,   11,   10,   11,   10,    1,   10,   11,   10,    0,
+       10,    9,    9,    9,   28,   29,    0,   10,   10,   10,
+       10,    9,   10,   10,    9,   10,    0
+
+    } ;
+
+static yyconst YY_CHAR yy_ec[256] =
+    {   0,
+        1,    1,    1,    1,    1,    1,    1,    1,    2,    3,
+        2,    2,    4,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    2,    5,    1,    6,    1,    7,    8,    1,    9,
+        9,   10,   11,    9,   12,   13,   14,   15,   16,   16,
+       16,   16,   16,   16,   16,   17,   17,    9,    9,   18,
+       19,   20,    9,    1,   21,   21,   21,   21,   22,   23,
+       24,   24,   24,   24,   24,   24,   24,   24,   24,   24,
+       24,   24,   24,   24,   25,   24,   24,   26,   24,   24,
+        9,   27,    9,   28,   24,    1,   21,   21,   21,   21,
+
+       22,   23,   24,   24,   24,   24,   24,   24,   24,   24,
+       24,   24,   24,   24,   24,   24,   25,   24,   24,   26,
+       24,   24,    9,   29,    9,    9,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1
+    } ;
+
+static yyconst YY_CHAR yy_meta[30] =
+    {   0,
+        1,    1,    2,    2,    1,    1,    1,    1,    1,    3,
+        1,    1,    4,    1,    5,    5,    5,    1,    1,    1,
+        5,    5,    5,    5,    5,    5,    1,    1,    1
+    } ;
+
+static yyconst flex_uint16_t yy_base[103] =
+    {   0,
+        0,    0,   27,   29,  137,  194,  133,  194,  117,  100,
+      194,   98,   26,  194,   94,   24,   28,   33,   32,   39,
+       51,   39,   80,   50,    0,   68,   25,   54,    0,  194,
+       88,   71,   80,  194,  194,  194,  194,  194,  194,  194,
+      194,  194,  194,   71,  194,    0,  194,   85,   55,   64,
+       99,  111,   53,  105,    0,   50,   55,  194,  194,  194,
+       40,    0,  194,   38,  194,  194,  194,  194,    0,  194,
+      194,  117,    0,  130,    0,    0,    0,  137,    0,   88,
+      113,    0,  131,    0,  194,  194,  143,  139,  152,  150,
+        0,   13,  153,  194,    0,  194,  194,  176,   31,  181,
+
+      186,  188
+    } ;
+
+static yyconst flex_int16_t yy_def[103] =
+    {   0,
+       97,    1,   98,   98,   97,   97,   97,   97,   97,   97,
+       97,   97,   97,   97,   97,   97,   97,   97,   97,   97,
+       20,   97,   97,   97,   99,   97,   97,   97,  100,   97,
+       97,   97,   97,   97,   97,   97,   97,   97,   97,   97,
+       97,   97,   97,   97,   97,  101,   97,   97,   20,   20,
+       50,   51,   51,  102,   21,   51,   97,   97,   97,   97,
+       97,   99,   97,   97,   97,   97,   97,   97,  100,   97,
+       97,   44,   44,   72,   72,  101,   48,   51,   51,   97,
+       52,   51,  102,   51,   97,   97,   97,   74,   78,   97,
+       51,   51,   97,   97,   51,   97,    0,   97,   97,   97,
+
+       97,   97
+    } ;
+
+static yyconst flex_uint16_t yy_nxt[224] =
+    {   0,
+        6,    7,    8,    9,   10,   11,   12,   13,   14,   15,
+       16,   17,   18,   19,   20,   21,   21,   22,   23,   24,
+       25,   25,   25,   25,   25,   25,   26,   27,   28,   30,
+       31,   30,   31,   37,   40,   62,   32,   95,   32,   42,
+       63,   45,   41,   65,   38,   46,   43,   44,   44,   44,
+       47,   48,   66,   49,   49,   50,   57,   58,   86,   51,
+       52,   51,   51,   53,   54,   55,   55,   55,   60,   61,
+       63,   64,   67,   85,   84,   56,   51,   82,   50,   50,
+       51,   33,   68,   72,   71,   73,   73,   73,   51,   51,
+       70,   72,   74,   75,   72,   72,   72,   51,   59,   77,
+
+       77,   77,   90,   90,   90,   51,   78,   79,   51,   51,
+       51,   51,   39,   51,   51,   51,   36,   51,   35,   34,
+       51,   80,   80,   97,   97,   81,   81,   81,   51,   51,
+       51,   72,   72,   72,   33,   91,   97,   97,   72,   72,
+       87,   87,   97,   51,   88,   88,   88,   87,   87,   97,
+       97,   89,   89,   89,   51,   92,   51,   93,   93,   93,
+       97,   75,   97,   97,   90,   90,   90,   93,   93,   93,
+       97,   97,   94,   97,   79,   96,   29,   29,   29,   29,
+       29,   69,   97,   97,   69,   69,   76,   97,   76,   76,
+       76,   83,   83,    5,   97,   97,   97,   97,   97,   97,
+
+       97,   97,   97,   97,   97,   97,   97,   97,   97,   97,
+       97,   97,   97,   97,   97,   97,   97,   97,   97,   97,
+       97,   97,   97
+    } ;
+
+static yyconst flex_int16_t yy_chk[224] =
+    {   0,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    3,
+        3,    4,    4,   13,   16,   99,    3,   92,    4,   17,
+       64,   19,   16,   27,   13,   19,   17,   18,   18,   18,
+       19,   20,   27,   20,   20,   20,   22,   22,   61,   20,
+       20,   20,   20,   20,   20,   21,   21,   21,   24,   24,
+       26,   26,   28,   57,   56,   21,   21,   53,   50,   50,
+       49,   33,   28,   44,   32,   44,   44,   44,   50,   50,
+       31,   44,   44,   44,   44,   44,   44,   48,   23,   48,
+
+       48,   48,   80,   80,   80,   48,   48,   48,   48,   48,
+       48,   51,   15,   51,   51,   51,   12,   54,   10,    9,
+       51,   52,   52,   81,   81,   52,   52,   52,   54,   54,
+       54,   72,   72,   72,    7,   81,    5,    0,   72,   72,
+       74,   74,    0,   83,   74,   74,   74,   78,   78,   88,
+       88,   78,   78,   78,   83,   83,   83,   87,   87,   87,
+        0,   88,   89,   89,   90,   90,   90,   93,   93,   93,
+        0,    0,   90,    0,   89,   93,   98,   98,   98,   98,
+       98,  100,    0,    0,  100,  100,  101,    0,  101,  101,
+      101,  102,  102,   97,   97,   97,   97,   97,   97,   97,
+
+       97,   97,   97,   97,   97,   97,   97,   97,   97,   97,
+       97,   97,   97,   97,   97,   97,   97,   97,   97,   97,
+       97,   97,   97
+    } ;
+
+/* The intent behind this definition is that it'll catch
+ * any uses of REJECT which flex missed.
+ */
+#define REJECT reject_used_but_not_detected
+#define yymore() yymore_used_but_not_detected
+#define YY_MORE_ADJ 0
+#define YY_RESTORE_YY_MORE_OFFSET
+/*
+//
+// Copyright (c) 2002-2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+This file contains the Lex specification for GLSL ES preprocessor.
+Based on Microsoft Visual Studio 2010 Preprocessor Grammar:
+http://msdn.microsoft.com/en-us/library/2scxys89.aspx
+
+IF YOU MODIFY THIS FILE YOU ALSO NEED TO RUN generate_parser.sh.
+*/
+
+#if defined(_MSC_VER)
+#pragma warning(disable: 4005)
+#endif
+
+#include "compiler/preprocessor/Tokenizer.h"
+
+#include "compiler/preprocessor/DiagnosticsBase.h"
+#include "compiler/preprocessor/Token.h"
+
+#if defined(__GNUC__)
+// Triggered by the auto-generated yy_fatal_error function.
+#pragma GCC diagnostic ignored "-Wmissing-noreturn"
+#elif defined(_MSC_VER)
+#pragma warning(disable: 4244)
+#endif
+
+// Workaround for flex using the register keyword, deprecated in C++11.
+#ifdef __cplusplus
+#if __cplusplus > 199711L
+#define register
+#endif
+#endif
+
+typedef std::string YYSTYPE;
+typedef pp::SourceLocation YYLTYPE;
+
+// Use the unused yycolumn variable to track file (string) number.
+#define yyfileno yycolumn
+
+#define YY_USER_INIT                   \
+    do {                               \
+        yyfileno = 0;                  \
+        yylineno = 1;                  \
+        yyextra->leadingSpace = false; \
+        yyextra->lineStart = true;     \
+    } while(0);
+
+#define YY_USER_ACTION                                              \
+    do                                                              \
+    {                                                               \
+        pp::Input* input = &yyextra->input;                         \
+        pp::Input::Location* scanLoc = &yyextra->scanLoc;           \
+        while ((scanLoc->sIndex < input->count()) &&                \
+               (scanLoc->cIndex >= input->length(scanLoc->sIndex))) \
+        {                                                           \
+            scanLoc->cIndex -= input->length(scanLoc->sIndex++);    \
+            ++yyfileno; yylineno = 1;                               \
+        }                                                           \
+        yylloc->file = yyfileno;                                    \
+        yylloc->line = yylineno;                                    \
+        scanLoc->cIndex += yyleng;                                  \
+    } while(0);
+
+#define YY_INPUT(buf, result, maxSize) \
+    result = yyextra->input.read(buf, maxSize, &yylineno);
+
+
+
+
+
+#define INITIAL 0
+#define COMMENT 1
+
+
+
+
+
+
+#define YY_EXTRA_TYPE pp::Tokenizer::Context*
+
+
+
+
+/* Holds the entire state of the reentrant scanner. */
+struct yyguts_t
+    {
+
+    /* User-defined. Not touched by flex. */
+    YY_EXTRA_TYPE yyextra_r;
+
+    /* The rest are the same as the globals declared in the non-reentrant scanner. */
+    FILE *yyin_r, *yyout_r;
+    size_t yy_buffer_stack_top; /**< index of top of stack. */
+    size_t yy_buffer_stack_max; /**< capacity of stack. */
+    YY_BUFFER_STATE * yy_buffer_stack; /**< Stack as an array. */
+    char yy_hold_char;
+    int yy_n_chars;
+    int yyleng_r;
+    char *yy_c_buf_p;
+    int yy_init;
+    int yy_start;
+    int yy_did_buffer_switch_on_eof;
+    int yy_start_stack_ptr;
+    int yy_start_stack_depth;
+    int *yy_start_stack;
+    yy_state_type yy_last_accepting_state;
+    char* yy_last_accepting_cpos;
+
+    int yylineno_r;
+    int yy_flex_debug_r;
+
+
+
+
+    char *yytext_r;
+    int yy_more_flag;
+    int yy_more_len;
+
+
+
+    YYSTYPE * yylval_r;
+
+
+
+    YYLTYPE * yylloc_r;
+
+
+    }; /* end struct yyguts_t */
+
+
+
+
+static int yy_init_globals (yyscan_t yyscanner );
+
+
+
+
+    
+    /* This must go here because YYSTYPE and YYLTYPE are included
+     * from bison output in section 1.*/
+    #    define yylval yyg->yylval_r
+    
+
+    
+    #    define yylloc yyg->yylloc_r
+    
+
+
+int pplex_init (yyscan_t* scanner);
+
+int pplex_init_extra (YY_EXTRA_TYPE user_defined,yyscan_t* scanner);
+
+
+
+/* Accessor methods to globals.
+   These are made visible to non-reentrant scanners for convenience. */
+
+
+int pplex_destroy (yyscan_t yyscanner );
+
+
+
+int ppget_debug (yyscan_t yyscanner );
+
+
+
+void ppset_debug (int debug_flag ,yyscan_t yyscanner );
+
+
+
+YY_EXTRA_TYPE ppget_extra (yyscan_t yyscanner );
+
+
+
+void ppset_extra (YY_EXTRA_TYPE user_defined ,yyscan_t yyscanner );
+
+
+
+FILE *ppget_in (yyscan_t yyscanner );
+
+
+
+void ppset_in  (FILE * _in_str ,yyscan_t yyscanner );
+
+
+
+FILE *ppget_out (yyscan_t yyscanner );
+
+
+
+void ppset_out  (FILE * _out_str ,yyscan_t yyscanner );
+
+
+
+			int ppget_leng (yyscan_t yyscanner );
+
+
+
+char *ppget_text (yyscan_t yyscanner );
+
+
+
+int ppget_lineno (yyscan_t yyscanner );
+
+
+
+void ppset_lineno (int _line_number ,yyscan_t yyscanner );
+
+
+
+
+int ppget_column  (yyscan_t yyscanner );
+
+
+
+
+
+void ppset_column (int _column_no ,yyscan_t yyscanner );
+
+
+
+
+YYSTYPE * ppget_lval (yyscan_t yyscanner );
+
+
+void ppset_lval (YYSTYPE * yylval_param ,yyscan_t yyscanner );
+
+
+    
+       YYLTYPE *ppget_lloc (yyscan_t yyscanner );
+    
+
+    
+        void ppset_lloc (YYLTYPE * yylloc_param ,yyscan_t yyscanner );
+    
+
+
+/* Macros after this point can all be overridden by user definitions in
+ * section 1.
+ */
+
+#ifndef YY_SKIP_YYWRAP
+#ifdef __cplusplus
+extern "C" int ppwrap (yyscan_t yyscanner );
+#else
+extern int ppwrap (yyscan_t yyscanner );
+#endif
+#endif
+
+
+#ifndef YY_NO_UNPUT
+    
+#endif
+
+
+#ifndef yytext_ptr
+static void yy_flex_strncpy (char *,yyconst char *,int ,yyscan_t yyscanner);
+#endif
+
+#ifdef YY_NEED_STRLEN
+static int yy_flex_strlen (yyconst char * ,yyscan_t yyscanner);
+#endif
+
+#ifndef YY_NO_INPUT
+
+#ifdef __cplusplus
+static int yyinput (yyscan_t yyscanner );
+#else
+static int input (yyscan_t yyscanner );
+#endif
+
+#endif
+
+
+
+
+
+
+
+
+/* Amount of stuff to slurp up with each read. */
+#ifndef YY_READ_BUF_SIZE
+#ifdef __ia64__
+/* On IA-64, the buffer size is 16k, not 8k */
+#define YY_READ_BUF_SIZE 16384
+#else
+#define YY_READ_BUF_SIZE 8192
+#endif /* __ia64__ */
+#endif
+
+
+/* Copy whatever the last rule matched to the standard output. */
+#ifndef ECHO
+/* This used to be an fputs(), but since the string might contain NUL's,
+ * we now use fwrite().
+ */
+#define ECHO do { if (fwrite( yytext, (size_t) yyleng, 1, yyout )) {} } while (0)
+#endif
+
+
+
+/* Gets input and stuffs it into "buf".  number of characters read, or YY_NULL,
+ * is returned in "result".
+ */
+#ifndef YY_INPUT
+#define YY_INPUT(buf,result,max_size) \
+	if ( YY_CURRENT_BUFFER_LVALUE->yy_is_interactive ) \
+		{ \
+		int c = '*'; \
+		size_t n; \
+		for ( n = 0; n < max_size && \
+			     (c = getc( yyin )) != EOF && c != '\n'; ++n ) \
+			buf[n] = (char) c; \
+		if ( c == '\n' ) \
+			buf[n++] = (char) c; \
+		if ( c == EOF && ferror( yyin ) ) \
+			YY_FATAL_ERROR( "input in flex scanner failed" ); \
+		result = n; \
+		} \
+	else \
+		{ \
+		errno=0; \
+		while ( (result = (int) fread(buf, 1, max_size, yyin))==0 && ferror(yyin)) \
+			{ \
+			if( errno != EINTR) \
+				{ \
+				YY_FATAL_ERROR( "input in flex scanner failed" ); \
+				break; \
+				} \
+			errno=0; \
+			clearerr(yyin); \
+			} \
+		}\
+\
+
+#endif
+
+
+
+/* No semi-colon after return; correct usage is to write "yyterminate();" -
+ * we don't want an extra ';' after the "return" because that will cause
+ * some compilers to complain about unreachable statements.
+ */
+#ifndef yyterminate
+#define yyterminate() return YY_NULL
+#endif
+
+
+/* Number of entries by which start-condition stack grows. */
+#ifndef YY_START_STACK_INCR
+#define YY_START_STACK_INCR 25
+#endif
+
+
+/* Report a fatal error. */
+#ifndef YY_FATAL_ERROR
+#define YY_FATAL_ERROR(msg) yy_fatal_error( msg , yyscanner)
+#endif
+
+
+
+
+
+/* end tables serialization structures and prototypes */
+
+
+
+/* Default declaration of generated scanner - a define so the user can
+ * easily add parameters.
+ */
+#ifndef YY_DECL
+#define YY_DECL_IS_OURS 1
+
+
+
+
+
+
+        
+    
+    
+
+
+
+    
+    
+    
+
+
+extern int pplex \
+               (YYSTYPE * yylval_param,YYLTYPE * yylloc_param ,yyscan_t yyscanner);
+
+#define YY_DECL int pplex \
+               (YYSTYPE * yylval_param, YYLTYPE * yylloc_param , yyscan_t yyscanner)
+#endif /* !YY_DECL */
+
+
+/* Code executed at the beginning of each rule, after yytext and yyleng
+ * have been set up.
+ */
+#ifndef YY_USER_ACTION
+#define YY_USER_ACTION
+#endif
+
+
+
+/* Code executed at the end of each rule. */
+#ifndef YY_BREAK
+#define YY_BREAK /*LINTED*/break;
+#endif
+
+
+
+#define YY_RULE_SETUP \
+	YY_USER_ACTION
+
+
+
+/** The main scanner function which does all the work.
+ */
+YY_DECL
+{
+	yy_state_type yy_current_state;
+	char *yy_cp, *yy_bp;
+	int yy_act;
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+
+
+
+
+    yylval = yylval_param;
+
+
+
+    yylloc = yylloc_param;
+
+
+	if ( !yyg->yy_init )
+		{
+		yyg->yy_init = 1;
+
+#ifdef YY_USER_INIT
+		YY_USER_INIT;
+#endif
+
+
+
+		if ( ! yyg->yy_start )
+			yyg->yy_start = 1;	/* first start state */
+
+		if ( ! yyin )
+			yyin = stdin;
+
+		if ( ! yyout )
+			yyout = stdout;
+
+		if ( ! YY_CURRENT_BUFFER ) {
+			ppensure_buffer_stack (yyscanner);
+			YY_CURRENT_BUFFER_LVALUE =
+				pp_create_buffer(yyin,YY_BUF_SIZE ,yyscanner);
+		}
+
+		pp_load_buffer_state(yyscanner );
+		}
+
+	{
+
+
+    /* Line comment */
+
+	while ( /*CONSTCOND*/1 )		/* loops until end-of-file is reached */
+		{
+		yy_cp = yyg->yy_c_buf_p;
+
+		/* Support of yytext. */
+		*yy_cp = yyg->yy_hold_char;
+
+		/* yy_bp points to the position in yy_ch_buf of the start of
+		 * the current run.
+		 */
+		yy_bp = yy_cp;
+
+		yy_current_state = yyg->yy_start;
+yy_match:
+		do
+			{
+			YY_CHAR yy_c = yy_ec[YY_SC_TO_UI(*yy_cp)] ;
+			if ( yy_accept[yy_current_state] )
+				{
+				yyg->yy_last_accepting_state = yy_current_state;
+				yyg->yy_last_accepting_cpos = yy_cp;
+				}
+			while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
+				{
+				yy_current_state = (int) yy_def[yy_current_state];
+				if ( yy_current_state >= 98 )
+					yy_c = yy_meta[(unsigned int) yy_c];
+				}
+			yy_current_state = yy_nxt[yy_base[yy_current_state] + (flex_int16_t) yy_c];
+			++yy_cp;
+			}
+		while ( yy_current_state != 97 );
+		yy_cp = yyg->yy_last_accepting_cpos;
+		yy_current_state = yyg->yy_last_accepting_state;
+
+yy_find_action:
+		yy_act = yy_accept[yy_current_state];
+
+		YY_DO_BEFORE_ACTION;
+
+
+
+do_action:	/* This label is used only to access EOF actions. */
+
+
+		switch ( yy_act )
+	{ /* beginning of action switch */
+			case 0: /* must back up */
+			/* undo the effects of YY_DO_BEFORE_ACTION */
+			*yy_cp = yyg->yy_hold_char;
+			yy_cp = yyg->yy_last_accepting_cpos;
+			yy_current_state = yyg->yy_last_accepting_state;
+			goto yy_find_action;
+
+case 1:
+YY_RULE_SETUP
+
+	YY_BREAK
+/* Block comment */
+/* Line breaks are just counted - not returned. */
+/* The comment is replaced by a single space. */
+case 2:
+YY_RULE_SETUP
+{ BEGIN(COMMENT); }
+	YY_BREAK
+case 3:
+YY_RULE_SETUP
+
+	YY_BREAK
+case 4:
+YY_RULE_SETUP
+
+	YY_BREAK
+case 5:
+/* rule 5 can match eol */
+YY_RULE_SETUP
+{ ++yylineno; }
+	YY_BREAK
+case 6:
+YY_RULE_SETUP
+{
+    yyextra->leadingSpace = true;
+    BEGIN(INITIAL);
+}
+	YY_BREAK
+case 7:
+YY_RULE_SETUP
+{
+    // # is only valid at start of line for preprocessor directives.
+    yylval->assign(1, yytext[0]);
+    return yyextra->lineStart ? pp::Token::PP_HASH : pp::Token::PP_OTHER;
+}
+	YY_BREAK
+case 8:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::IDENTIFIER;
+}
+	YY_BREAK
+case 9:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::CONST_INT;
+}
+	YY_BREAK
+case 10:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::CONST_FLOAT;
+}
+	YY_BREAK
+/* Anything that starts with a {DIGIT} or .{DIGIT} must be a number. */
+/* Rule to catch all invalid integers and floats. */
+case 11:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::PP_NUMBER;
+}
+	YY_BREAK
+case 12:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_INC;
+}
+	YY_BREAK
+case 13:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_DEC;
+}
+	YY_BREAK
+case 14:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_LEFT;
+}
+	YY_BREAK
+case 15:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_RIGHT;
+}
+	YY_BREAK
+case 16:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_LE;
+}
+	YY_BREAK
+case 17:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_GE;
+}
+	YY_BREAK
+case 18:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_EQ;
+}
+	YY_BREAK
+case 19:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_NE;
+}
+	YY_BREAK
+case 20:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_AND;
+}
+	YY_BREAK
+case 21:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_XOR;
+}
+	YY_BREAK
+case 22:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_OR;
+}
+	YY_BREAK
+case 23:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_ADD_ASSIGN;
+}
+	YY_BREAK
+case 24:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_SUB_ASSIGN;
+}
+	YY_BREAK
+case 25:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_MUL_ASSIGN;
+}
+	YY_BREAK
+case 26:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_DIV_ASSIGN;
+}
+	YY_BREAK
+case 27:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_MOD_ASSIGN;
+}
+	YY_BREAK
+case 28:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_LEFT_ASSIGN;
+}
+	YY_BREAK
+case 29:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_RIGHT_ASSIGN;
+}
+	YY_BREAK
+case 30:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_AND_ASSIGN;
+}
+	YY_BREAK
+case 31:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_XOR_ASSIGN;
+}
+	YY_BREAK
+case 32:
+YY_RULE_SETUP
+{
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_OR_ASSIGN;
+}
+	YY_BREAK
+case 33:
+YY_RULE_SETUP
+{
+    yylval->assign(1, yytext[0]);
+    return yytext[0];
+}
+	YY_BREAK
+case 34:
+YY_RULE_SETUP
+{ yyextra->leadingSpace = true; }
+	YY_BREAK
+case 35:
+/* rule 35 can match eol */
+YY_RULE_SETUP
+{
+    ++yylineno;
+    yylval->assign(1, '\n');
+    return '\n';
+}
+	YY_BREAK
+case 36:
+/* rule 36 can match eol */
+YY_RULE_SETUP
+{ ++yylineno; }
+	YY_BREAK
+case 37:
+YY_RULE_SETUP
+{
+    yylval->assign(1, yytext[0]);
+    return pp::Token::PP_OTHER;
+}
+	YY_BREAK
+case YY_STATE_EOF(INITIAL):
+case YY_STATE_EOF(COMMENT):
+{
+    // YY_USER_ACTION is not invoked for handling EOF.
+    // Set the location for EOF token manually.
+    pp::Input* input = &yyextra->input;
+    pp::Input::Location* scanLoc = &yyextra->scanLoc;
+    yy_size_t sIndexMax = input->count() ? input->count() - 1 : 0;
+    if (scanLoc->sIndex != sIndexMax)
+    {
+        // We can only reach here if there are empty strings at the
+        // end of the input.
+        scanLoc->sIndex = sIndexMax; scanLoc->cIndex = 0;
+        // FIXME: this is not 64-bit clean.
+        yyfileno = static_cast<int>(sIndexMax); yylineno = 1;
+    }
+    yylloc->file = yyfileno;
+    yylloc->line = yylineno;
+    yylval->clear();
+
+    if (YY_START == COMMENT)
+    {
+        yyextra->diagnostics->report(pp::Diagnostics::PP_EOF_IN_COMMENT,
+                                     pp::SourceLocation(yyfileno, yylineno),
+                                     "");
+    }
+    yyterminate();
+}
+	YY_BREAK
+case 38:
+YY_RULE_SETUP
+ECHO;
+	YY_BREAK
+
+	case YY_END_OF_BUFFER:
+		{
+		/* Amount of text matched not including the EOB char. */
+		int yy_amount_of_matched_text = (int) (yy_cp - yyg->yytext_ptr) - 1;
+
+		/* Undo the effects of YY_DO_BEFORE_ACTION. */
+		*yy_cp = yyg->yy_hold_char;
+		YY_RESTORE_YY_MORE_OFFSET
+
+		if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_NEW )
+			{
+			/* We're scanning a new file or input source.  It's
+			 * possible that this happened because the user
+			 * just pointed yyin at a new source and called
+			 * pplex().  If so, then we have to assure
+			 * consistency between YY_CURRENT_BUFFER and our
+			 * globals.  Here is the right place to do so, because
+			 * this is the first action (other than possibly a
+			 * back-up) that will match for the new input source.
+			 */
+			yyg->yy_n_chars = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
+			YY_CURRENT_BUFFER_LVALUE->yy_input_file = yyin;
+			YY_CURRENT_BUFFER_LVALUE->yy_buffer_status = YY_BUFFER_NORMAL;
+			}
+
+		/* Note that here we test for yy_c_buf_p "<=" to the position
+		 * of the first EOB in the buffer, since yy_c_buf_p will
+		 * already have been incremented past the NUL character
+		 * (since all states make transitions on EOB to the
+		 * end-of-buffer state).  Contrast this with the test
+		 * in input().
+		 */
+		if ( yyg->yy_c_buf_p <= &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars] )
+			{ /* This was really a NUL. */
+			yy_state_type yy_next_state;
+
+			yyg->yy_c_buf_p = yyg->yytext_ptr + yy_amount_of_matched_text;
+
+			yy_current_state = yy_get_previous_state( yyscanner );
+
+			/* Okay, we're now positioned to make the NUL
+			 * transition.  We couldn't have
+			 * yy_get_previous_state() go ahead and do it
+			 * for us because it doesn't know how to deal
+			 * with the possibility of jamming (and we don't
+			 * want to build jamming into it because then it
+			 * will run more slowly).
+			 */
+
+			yy_next_state = yy_try_NUL_trans( yy_current_state , yyscanner);
+
+			yy_bp = yyg->yytext_ptr + YY_MORE_ADJ;
+
+			if ( yy_next_state )
+				{
+				/* Consume the NUL. */
+				yy_cp = ++yyg->yy_c_buf_p;
+				yy_current_state = yy_next_state;
+				goto yy_match;
+				}
+
+			else
+				{
+				yy_cp = yyg->yy_last_accepting_cpos;
+				yy_current_state = yyg->yy_last_accepting_state;
+				goto yy_find_action;
+				}
+			}
+
+		else switch ( yy_get_next_buffer( yyscanner ) )
+			{
+			case EOB_ACT_END_OF_FILE:
+				{
+				yyg->yy_did_buffer_switch_on_eof = 0;
+
+				if ( ppwrap(yyscanner ) )
+					{
+					/* Note: because we've taken care in
+					 * yy_get_next_buffer() to have set up
+					 * yytext, we can now set up
+					 * yy_c_buf_p so that if some total
+					 * hoser (like flex itself) wants to
+					 * call the scanner after we return the
+					 * YY_NULL, it'll still work - another
+					 * YY_NULL will get returned.
+					 */
+					yyg->yy_c_buf_p = yyg->yytext_ptr + YY_MORE_ADJ;
+
+					yy_act = YY_STATE_EOF(YY_START);
+					goto do_action;
+					}
+
+				else
+					{
+					if ( ! yyg->yy_did_buffer_switch_on_eof )
+						YY_NEW_FILE;
+					}
+				break;
+				}
+
+			case EOB_ACT_CONTINUE_SCAN:
+				yyg->yy_c_buf_p =
+					yyg->yytext_ptr + yy_amount_of_matched_text;
+
+				yy_current_state = yy_get_previous_state( yyscanner );
+
+				yy_cp = yyg->yy_c_buf_p;
+				yy_bp = yyg->yytext_ptr + YY_MORE_ADJ;
+				goto yy_match;
+
+			case EOB_ACT_LAST_MATCH:
+				yyg->yy_c_buf_p =
+				&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars];
+
+				yy_current_state = yy_get_previous_state( yyscanner );
+
+				yy_cp = yyg->yy_c_buf_p;
+				yy_bp = yyg->yytext_ptr + YY_MORE_ADJ;
+				goto yy_find_action;
+			}
+		break;
+		}
+
+	default:
+		YY_FATAL_ERROR(
+			"fatal flex scanner internal error--no action found" );
+	} /* end of action switch */
+		} /* end of scanning one token */
+	} /* end of user's declarations */
+} /* end of pplex */
+
+
+
+
+
+
+/* yy_get_next_buffer - try to read in a new buffer
+ *
+ * Returns a code representing an action:
+ *	EOB_ACT_LAST_MATCH -
+ *	EOB_ACT_CONTINUE_SCAN - continue scanning from current position
+ *	EOB_ACT_END_OF_FILE - end of file
+ */
+static int yy_get_next_buffer (yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+	char *dest = YY_CURRENT_BUFFER_LVALUE->yy_ch_buf;
+	char *source = yyg->yytext_ptr;
+	yy_size_t number_to_move, i;
+	int ret_val;
+
+	if ( yyg->yy_c_buf_p > &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars + 1] )
+		YY_FATAL_ERROR(
+		"fatal flex scanner internal error--end of buffer missed" );
+
+	if ( YY_CURRENT_BUFFER_LVALUE->yy_fill_buffer == 0 )
+		{ /* Don't try to fill the buffer, so this is an EOF. */
+		if ( yyg->yy_c_buf_p - yyg->yytext_ptr - YY_MORE_ADJ == 1 )
+			{
+			/* We matched a single character, the EOB, so
+			 * treat this as a final EOF.
+			 */
+			return EOB_ACT_END_OF_FILE;
+			}
+
+		else
+			{
+			/* We matched some text prior to the EOB, first
+			 * process it.
+			 */
+			return EOB_ACT_LAST_MATCH;
+			}
+		}
+
+	/* Try to read more data. */
+
+	/* First move last chars to start of buffer. */
+	number_to_move = (yy_size_t) (yyg->yy_c_buf_p - yyg->yytext_ptr) - 1;
+
+	for ( i = 0; i < number_to_move; ++i )
+		*(dest++) = *(source++);
+
+	if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_EOF_PENDING )
+		/* don't do the read, it's not guaranteed to return an EOF,
+		 * just force an EOF
+		 */
+		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars = 0;
+
+	else
+		{
+			int num_to_read =
+			static_cast<int>(YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move - 1);
+
+		while ( num_to_read <= 0 )
+			{ /* Not enough room in the buffer - grow it. */
+
+			/* just a shorter name for the current buffer */
+			YY_BUFFER_STATE b = YY_CURRENT_BUFFER_LVALUE;
+
+			int yy_c_buf_p_offset =
+				(int) (yyg->yy_c_buf_p - b->yy_ch_buf);
+
+			if ( b->yy_is_our_buffer )
+				{
+				int new_size = b->yy_buf_size * 2;
+
+				if ( new_size <= 0 )
+					b->yy_buf_size += b->yy_buf_size / 8;
+				else
+					b->yy_buf_size *= 2;
+
+				b->yy_ch_buf = (char *)
+					/* Include room in for 2 EOB chars. */
+					pprealloc((void *) b->yy_ch_buf,b->yy_buf_size + 2 ,yyscanner );
+				}
+			else
+				/* Can't grow it, we don't own it. */
+				b->yy_ch_buf = NULL;
+
+			if ( ! b->yy_ch_buf )
+				YY_FATAL_ERROR(
+				"fatal error - scanner input buffer overflow" );
+
+			yyg->yy_c_buf_p = &b->yy_ch_buf[yy_c_buf_p_offset];
+
+			num_to_read = static_cast<int>(YY_CURRENT_BUFFER_LVALUE->yy_buf_size -
+						number_to_move - 1);
+
+			}
+
+		if ( num_to_read > YY_READ_BUF_SIZE )
+			num_to_read = YY_READ_BUF_SIZE;
+
+		/* Read in more data. */
+		yy_size_t ret = 0;
+		YY_INPUT( (&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move]),
+			ret, num_to_read );
+		yyg->yy_n_chars = static_cast<int>(ret);
+
+		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars;
+		}
+
+	if ( yyg->yy_n_chars == 0 )
+		{
+		if ( number_to_move == YY_MORE_ADJ )
+			{
+			ret_val = EOB_ACT_END_OF_FILE;
+			pprestart(yyin  ,yyscanner);
+			}
+
+		else
+			{
+			ret_val = EOB_ACT_LAST_MATCH;
+			YY_CURRENT_BUFFER_LVALUE->yy_buffer_status =
+				YY_BUFFER_EOF_PENDING;
+			}
+		}
+
+	else
+		ret_val = EOB_ACT_CONTINUE_SCAN;
+
+	if ((int) (yyg->yy_n_chars + number_to_move) > YY_CURRENT_BUFFER_LVALUE->yy_buf_size) {
+		/* Extend the array by 50%, plus the number we really need. */
+		yy_size_t new_size = yyg->yy_n_chars + number_to_move + (yyg->yy_n_chars >> 1);
+		YY_CURRENT_BUFFER_LVALUE->yy_ch_buf = (char *) pprealloc((void *) YY_CURRENT_BUFFER_LVALUE->yy_ch_buf,new_size ,yyscanner );
+		if ( ! YY_CURRENT_BUFFER_LVALUE->yy_ch_buf )
+			YY_FATAL_ERROR( "out of dynamic memory in yy_get_next_buffer()" );
+	}
+
+	yyg->yy_n_chars += static_cast<int>(number_to_move);
+	YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars] = YY_END_OF_BUFFER_CHAR;
+	YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars + 1] = YY_END_OF_BUFFER_CHAR;
+
+	yyg->yytext_ptr = &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[0];
+
+	return ret_val;
+}
+
+
+/* yy_get_previous_state - get the state just before the EOB char was reached */
+
+
+    static yy_state_type yy_get_previous_state (yyscan_t yyscanner)
+{
+	yy_state_type yy_current_state;
+	char *yy_cp;
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+
+	yy_current_state = yyg->yy_start;
+
+	for ( yy_cp = yyg->yytext_ptr + YY_MORE_ADJ; yy_cp < yyg->yy_c_buf_p; ++yy_cp )
+		{
+		YY_CHAR yy_c = (*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : 1);
+		if ( yy_accept[yy_current_state] )
+			{
+			yyg->yy_last_accepting_state = yy_current_state;
+			yyg->yy_last_accepting_cpos = yy_cp;
+			}
+		while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
+			{
+			yy_current_state = (int) yy_def[yy_current_state];
+			if ( yy_current_state >= 98 )
+				yy_c = yy_meta[(unsigned int) yy_c];
+			}
+		yy_current_state = yy_nxt[yy_base[yy_current_state] + (flex_int16_t) yy_c];
+		}
+
+	return yy_current_state;
+}
+
+
+/* yy_try_NUL_trans - try to make a transition on the NUL character
+ *
+ * synopsis
+ *	next_state = yy_try_NUL_trans( current_state );
+ */
+    static yy_state_type yy_try_NUL_trans  (yy_state_type yy_current_state , yyscan_t yyscanner)
+{
+	int yy_is_jam;
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner; /* This var may be unused depending upon options. */
+	char *yy_cp = yyg->yy_c_buf_p;
+
+	YY_CHAR yy_c = 1;
+	if ( yy_accept[yy_current_state] )
+		{
+		yyg->yy_last_accepting_state = yy_current_state;
+		yyg->yy_last_accepting_cpos = yy_cp;
+		}
+	while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
+		{
+		yy_current_state = (int) yy_def[yy_current_state];
+		if ( yy_current_state >= 98 )
+			yy_c = yy_meta[(unsigned int) yy_c];
+		}
+	yy_current_state = yy_nxt[yy_base[yy_current_state] + (flex_int16_t) yy_c];
+	yy_is_jam = (yy_current_state == 97);
+
+	(void)yyg;
+	return yy_is_jam ? 0 : yy_current_state;
+}
+
+
+#ifndef YY_NO_UNPUT
+
+#endif
+
+#ifndef YY_NO_INPUT
+#ifdef __cplusplus
+    static int yyinput (yyscan_t yyscanner)
+#else
+    static int input  (yyscan_t yyscanner)
+#endif
+
+{
+	int c;
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+
+	*yyg->yy_c_buf_p = yyg->yy_hold_char;
+
+	if ( *yyg->yy_c_buf_p == YY_END_OF_BUFFER_CHAR )
+		{
+		/* yy_c_buf_p now points to the character we want to return.
+		 * If this occurs *before* the EOB characters, then it's a
+		 * valid NUL; if not, then we've hit the end of the buffer.
+		 */
+		if ( yyg->yy_c_buf_p < &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars] )
+			/* This was really a NUL. */
+			*yyg->yy_c_buf_p = '\0';
+
+		else
+			{ /* need more input */
+			int offset = yyg->yy_c_buf_p - yyg->yytext_ptr;
+			++yyg->yy_c_buf_p;
+
+			switch ( yy_get_next_buffer( yyscanner ) )
+				{
+				case EOB_ACT_LAST_MATCH:
+					/* This happens because yy_g_n_b()
+					 * sees that we've accumulated a
+					 * token and flags that we need to
+					 * try matching the token before
+					 * proceeding.  But for input(),
+					 * there's no matching to consider.
+					 * So convert the EOB_ACT_LAST_MATCH
+					 * to EOB_ACT_END_OF_FILE.
+					 */
+
+					/* Reset buffer status. */
+					pprestart(yyin ,yyscanner);
+
+					/*FALLTHROUGH*/
+
+				case EOB_ACT_END_OF_FILE:
+					{
+					if ( ppwrap(yyscanner ) )
+						return 0;
+
+					if ( ! yyg->yy_did_buffer_switch_on_eof )
+						YY_NEW_FILE;
+#ifdef __cplusplus
+					return yyinput(yyscanner);
+#else
+					return input(yyscanner);
+#endif
+					}
+
+				case EOB_ACT_CONTINUE_SCAN:
+					yyg->yy_c_buf_p = yyg->yytext_ptr + offset;
+					break;
+				}
+			}
+		}
+
+	c = *(unsigned char *) yyg->yy_c_buf_p;	/* cast for 8-bit char's */
+	*yyg->yy_c_buf_p = '\0';	/* preserve yytext */
+	yyg->yy_hold_char = *++yyg->yy_c_buf_p;
+
+
+	return c;
+}
+#endif	/* ifndef YY_NO_INPUT */
+
+/** Immediately switch to a different input stream.
+ * @param input_file A readable stream.
+ * @param yyscanner The scanner object.
+ * @note This function does not reset the start condition to @c INITIAL .
+ */
+    void pprestart  (FILE * input_file , yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+
+	if ( ! YY_CURRENT_BUFFER ){
+        ppensure_buffer_stack (yyscanner);
+		YY_CURRENT_BUFFER_LVALUE =
+            pp_create_buffer(yyin,YY_BUF_SIZE ,yyscanner);
+	}
+
+	pp_init_buffer(YY_CURRENT_BUFFER,input_file ,yyscanner);
+	pp_load_buffer_state(yyscanner );
+}
+
+
+/** Switch to a different input buffer.
+ * @param new_buffer The new input buffer.
+ * @param yyscanner The scanner object.
+ */
+    void pp_switch_to_buffer  (YY_BUFFER_STATE  new_buffer , yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+
+	/* TODO. We should be able to replace this entire function body
+	 * with
+	 *		pppop_buffer_state();
+	 *		pppush_buffer_state(new_buffer);
+     */
+	ppensure_buffer_stack (yyscanner);
+	if ( YY_CURRENT_BUFFER == new_buffer )
+		return;
+
+	if ( YY_CURRENT_BUFFER )
+		{
+		/* Flush out information for old buffer. */
+		*yyg->yy_c_buf_p = yyg->yy_hold_char;
+		YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = yyg->yy_c_buf_p;
+		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars;
+		}
+
+	YY_CURRENT_BUFFER_LVALUE = new_buffer;
+	pp_load_buffer_state(yyscanner );
+
+	/* We don't actually know whether we did this switch during
+	 * EOF (ppwrap()) processing, but the only time this flag
+	 * is looked at is after ppwrap() is called, so it's safe
+	 * to go ahead and always set it.
+	 */
+	yyg->yy_did_buffer_switch_on_eof = 1;
+}
+
+
+static void pp_load_buffer_state  (yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+	yyg->yy_n_chars = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
+	yyg->yytext_ptr = yyg->yy_c_buf_p = YY_CURRENT_BUFFER_LVALUE->yy_buf_pos;
+	yyin = YY_CURRENT_BUFFER_LVALUE->yy_input_file;
+	yyg->yy_hold_char = *yyg->yy_c_buf_p;
+}
+
+/** Allocate and initialize an input buffer state.
+ * @param file A readable stream.
+ * @param size The character buffer size in bytes. When in doubt, use @c YY_BUF_SIZE.
+ * @param yyscanner The scanner object.
+ * @return the allocated buffer state.
+ */
+    YY_BUFFER_STATE pp_create_buffer  (FILE * file, int  size , yyscan_t yyscanner)
+{
+	YY_BUFFER_STATE b;
+    
+	b = (YY_BUFFER_STATE) ppalloc(sizeof( struct yy_buffer_state ) ,yyscanner );
+	if ( ! b )
+		YY_FATAL_ERROR( "out of dynamic memory in pp_create_buffer()" );
+
+	b->yy_buf_size = (yy_size_t)size;
+
+	/* yy_ch_buf has to be 2 characters longer than the size given because
+	 * we need to put in 2 end-of-buffer characters.
+	 */
+	b->yy_ch_buf = (char *) ppalloc(b->yy_buf_size + 2 ,yyscanner );
+	if ( ! b->yy_ch_buf )
+		YY_FATAL_ERROR( "out of dynamic memory in pp_create_buffer()" );
+
+	b->yy_is_our_buffer = 1;
+
+	pp_init_buffer(b,file ,yyscanner);
+
+	return b;
+}
+
+
+/** Destroy the buffer.
+ * @param b a buffer created with pp_create_buffer()
+ * @param yyscanner The scanner object.
+ */
+    void pp_delete_buffer (YY_BUFFER_STATE  b , yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+
+	if ( ! b )
+		return;
+
+	if ( b == YY_CURRENT_BUFFER ) /* Not sure if we should pop here. */
+		YY_CURRENT_BUFFER_LVALUE = (YY_BUFFER_STATE) 0;
+
+	if ( b->yy_is_our_buffer )
+		ppfree((void *) b->yy_ch_buf ,yyscanner );
+
+	ppfree((void *) b ,yyscanner );
+}
+
+
+/* Initializes or reinitializes a buffer.
+ * This function is sometimes called more than once on the same buffer,
+ * such as during a pprestart() or at EOF.
+ */
+    static void pp_init_buffer  (YY_BUFFER_STATE  b, FILE * file , yyscan_t yyscanner)
+
+{
+	int oerrno = errno;
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+
+	pp_flush_buffer(b ,yyscanner);
+
+	b->yy_input_file = file;
+	b->yy_fill_buffer = 1;
+
+    /* If b is the current buffer, then pp_init_buffer was _probably_
+     * called from pprestart() or through yy_get_next_buffer.
+     * In that case, we don't want to reset the lineno or column.
+     */
+    if (b != YY_CURRENT_BUFFER){
+        b->yy_bs_lineno = 1;
+        b->yy_bs_column = 0;
+    }
+
+
+    
+        b->yy_is_interactive = 0;
+    
+
+	errno = oerrno;
+}
+
+/** Discard all buffered characters. On the next scan, YY_INPUT will be called.
+ * @param b the buffer state to be flushed, usually @c YY_CURRENT_BUFFER.
+ * @param yyscanner The scanner object.
+ */
+    void pp_flush_buffer (YY_BUFFER_STATE  b , yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+	if ( ! b )
+		return;
+
+	b->yy_n_chars = 0;
+
+	/* We always need two end-of-buffer characters.  The first causes
+	 * a transition to the end-of-buffer state.  The second causes
+	 * a jam in that state.
+	 */
+	b->yy_ch_buf[0] = YY_END_OF_BUFFER_CHAR;
+	b->yy_ch_buf[1] = YY_END_OF_BUFFER_CHAR;
+
+	b->yy_buf_pos = &b->yy_ch_buf[0];
+
+	b->yy_at_bol = 1;
+	b->yy_buffer_status = YY_BUFFER_NEW;
+
+	if ( b == YY_CURRENT_BUFFER )
+		pp_load_buffer_state(yyscanner );
+}
+
+/** Pushes the new state onto the stack. The new state becomes
+ *  the current state. This function will allocate the stack
+ *  if necessary.
+ *  @param new_buffer The new state.
+ *  @param yyscanner The scanner object.
+ */
+void pppush_buffer_state (YY_BUFFER_STATE new_buffer , yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+	if (new_buffer == NULL)
+		return;
+
+	ppensure_buffer_stack(yyscanner);
+
+	/* This block is copied from pp_switch_to_buffer. */
+	if ( YY_CURRENT_BUFFER )
+		{
+		/* Flush out information for old buffer. */
+		*yyg->yy_c_buf_p = yyg->yy_hold_char;
+		YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = yyg->yy_c_buf_p;
+		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars;
+		}
+
+	/* Only push if top exists. Otherwise, replace top. */
+	if (YY_CURRENT_BUFFER)
+		yyg->yy_buffer_stack_top++;
+	YY_CURRENT_BUFFER_LVALUE = new_buffer;
+
+	/* copied from pp_switch_to_buffer. */
+	pp_load_buffer_state(yyscanner );
+	yyg->yy_did_buffer_switch_on_eof = 1;
+}
+
+
+/** Removes and deletes the top of the stack, if present.
+ *  The next element becomes the new top.
+ *  @param yyscanner The scanner object.
+ */
+void pppop_buffer_state (yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+	if (!YY_CURRENT_BUFFER)
+		return;
+
+	pp_delete_buffer(YY_CURRENT_BUFFER ,yyscanner);
+	YY_CURRENT_BUFFER_LVALUE = NULL;
+	if (yyg->yy_buffer_stack_top > 0)
+		--yyg->yy_buffer_stack_top;
+
+	if (YY_CURRENT_BUFFER) {
+		pp_load_buffer_state(yyscanner );
+		yyg->yy_did_buffer_switch_on_eof = 1;
+	}
+}
+
+
+/* Allocates the stack if it does not exist.
+ *  Guarantees space for at least one push.
+ */
+static void ppensure_buffer_stack (yyscan_t yyscanner)
+{
+	yy_size_t num_to_alloc;
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+
+	if (!yyg->yy_buffer_stack) {
+
+		/* First allocation is just for 2 elements, since we don't know if this
+		 * scanner will even need a stack. We use 2 instead of 1 to avoid an
+		 * immediate realloc on the next call.
+         */
+      num_to_alloc = 1; /* After all that talk, this was set to 1 anyways... */
+		yyg->yy_buffer_stack = (struct yy_buffer_state**)ppalloc
+								(num_to_alloc * sizeof(struct yy_buffer_state*)
+								, yyscanner);
+		if ( ! yyg->yy_buffer_stack )
+			YY_FATAL_ERROR( "out of dynamic memory in ppensure_buffer_stack()" );
+								  
+		
+		memset(yyg->yy_buffer_stack, 0, num_to_alloc * sizeof(struct yy_buffer_state*));
+				
+		yyg->yy_buffer_stack_max = num_to_alloc;
+		yyg->yy_buffer_stack_top = 0;
+		return;
+	}
+
+	if (yyg->yy_buffer_stack_top >= (yyg->yy_buffer_stack_max) - 1){
+
+		/* Increase the buffer to prepare for a possible push. */
+		yy_size_t grow_size = 8 /* arbitrary grow size */;
+
+		num_to_alloc = yyg->yy_buffer_stack_max + grow_size;
+		yyg->yy_buffer_stack = (struct yy_buffer_state**)pprealloc
+								(yyg->yy_buffer_stack,
+								num_to_alloc * sizeof(struct yy_buffer_state*)
+								, yyscanner);
+		if ( ! yyg->yy_buffer_stack )
+			YY_FATAL_ERROR( "out of dynamic memory in ppensure_buffer_stack()" );
+
+		/* zero only the new slots.*/
+		memset(yyg->yy_buffer_stack + yyg->yy_buffer_stack_max, 0, grow_size * sizeof(struct yy_buffer_state*));
+		yyg->yy_buffer_stack_max = num_to_alloc;
+	}
+}
+
+
+
+
+
+/** Setup the input buffer state to scan directly from a user-specified character buffer.
+ * @param base the character buffer
+ * @param size the size in bytes of the character buffer
+ * @param yyscanner The scanner object.
+ * @return the newly allocated buffer state object. 
+ */
+YY_BUFFER_STATE pp_scan_buffer  (char * base, yy_size_t  size , yyscan_t yyscanner)
+{
+	YY_BUFFER_STATE b;
+    
+	if ( size < 2 ||
+	     base[size-2] != YY_END_OF_BUFFER_CHAR ||
+	     base[size-1] != YY_END_OF_BUFFER_CHAR )
+		/* They forgot to leave room for the EOB's. */
+		return NULL;
+
+	b = (YY_BUFFER_STATE) ppalloc(sizeof( struct yy_buffer_state ) ,yyscanner );
+	if ( ! b )
+		YY_FATAL_ERROR( "out of dynamic memory in pp_scan_buffer()" );
+
+	b->yy_buf_size = static_cast<int>(size - 2);	/* "- 2" to take care of EOB's */
+	b->yy_buf_pos = b->yy_ch_buf = base;
+	b->yy_is_our_buffer = 0;
+	b->yy_input_file = NULL;
+	b->yy_n_chars = b->yy_buf_size;
+	b->yy_is_interactive = 0;
+	b->yy_at_bol = 1;
+	b->yy_fill_buffer = 0;
+	b->yy_buffer_status = YY_BUFFER_NEW;
+
+	pp_switch_to_buffer(b ,yyscanner );
+
+	return b;
+}
+
+
+
+
+/** Setup the input buffer state to scan a string. The next call to pplex() will
+ * scan from a @e copy of @a str.
+ * @param yystr a NUL-terminated string to scan
+ * @param yyscanner The scanner object.
+ * @return the newly allocated buffer state object.
+ * @note If you want to scan bytes that may contain NUL values, then use
+ *       pp_scan_bytes() instead.
+ */
+YY_BUFFER_STATE pp_scan_string (yyconst char * yystr , yyscan_t yyscanner)
+{
+    
+	return pp_scan_bytes(yystr,(int) strlen(yystr) ,yyscanner);
+}
+
+
+
+
+/** Setup the input buffer state to scan the given bytes. The next call to pplex() will
+ * scan from a @e copy of @a bytes.
+ * @param yybytes the byte buffer to scan
+ * @param _yybytes_len the number of bytes in the buffer pointed to by @a bytes.
+ * @param yyscanner The scanner object.
+ * @return the newly allocated buffer state object.
+ */
+YY_BUFFER_STATE pp_scan_bytes  (yyconst char * yybytes, int  _yybytes_len , yyscan_t yyscanner)
+{
+	YY_BUFFER_STATE b;
+	char *buf;
+	yy_size_t n;
+	yy_size_t i;
+    
+	/* Get memory for full buffer, including space for trailing EOB's. */
+	n = (yy_size_t) _yybytes_len + 2;
+	buf = (char *) ppalloc(n ,yyscanner );
+	if ( ! buf )
+		YY_FATAL_ERROR( "out of dynamic memory in pp_scan_bytes()" );
+
+	for ( i = 0; i < static_cast<yy_size_t>(_yybytes_len); ++i )
+		buf[i] = yybytes[i];
+
+	buf[_yybytes_len] = buf[_yybytes_len+1] = YY_END_OF_BUFFER_CHAR;
+
+	b = pp_scan_buffer(buf,n ,yyscanner);
+	if ( ! b )
+		YY_FATAL_ERROR( "bad buffer in pp_scan_bytes()" );
+
+	/* It's okay to grow etc. this buffer, and we should throw it
+	 * away when we're done.
+	 */
+	b->yy_is_our_buffer = 1;
+
+	return b;
+}
+
+
+
+
+
+
+
+
+
+
+
+#ifndef YY_EXIT_FAILURE
+#define YY_EXIT_FAILURE 2
+#endif
+
+static void yynoreturn yy_fatal_error (yyconst char* msg , yyscan_t yyscanner)
+{
+	struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+	(void)yyg;
+	(void) fprintf( stderr, "%s\n", msg );
+	exit( YY_EXIT_FAILURE );
+}
+
+/* Redefine yyless() so it works in section 3 code. */
+
+#undef yyless
+#define yyless(n) \
+	do \
+		{ \
+		/* Undo effects of setting up yytext. */ \
+        int yyless_macro_arg = (n); \
+        YY_LESS_LINENO(yyless_macro_arg);\
+		yytext[yyleng] = yyg->yy_hold_char; \
+		yyg->yy_c_buf_p = yytext + yyless_macro_arg; \
+		yyg->yy_hold_char = *yyg->yy_c_buf_p; \
+		*yyg->yy_c_buf_p = '\0'; \
+		yyleng = yyless_macro_arg; \
+		} \
+	while ( 0 )
+
+
+
+/* Accessor  methods (get/set functions) to struct members. */
+
+
+/** Get the user-defined data for this scanner.
+ * @param yyscanner The scanner object.
+ */
+YY_EXTRA_TYPE ppget_extra  (yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    return yyextra;
+}
+
+
+
+/** Get the current line number.
+ * @param yyscanner The scanner object.
+ */
+int ppget_lineno  (yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    
+    
+        if (! YY_CURRENT_BUFFER)
+            return 0;
+    
+    return yylineno;
+}
+
+
+
+
+/** Get the current column number.
+ * @param yyscanner The scanner object.
+ */
+int ppget_column  (yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    
+    
+        if (! YY_CURRENT_BUFFER)
+            return 0;
+    
+    return yycolumn;
+}
+
+
+
+
+/** Get the input stream.
+ * @param yyscanner The scanner object.
+ */
+FILE *ppget_in  (yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    return yyin;
+}
+
+
+
+/** Get the output stream.
+ * @param yyscanner The scanner object.
+ */
+FILE *ppget_out  (yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    return yyout;
+}
+
+
+
+/** Get the length of the current token.
+ * @param yyscanner The scanner object.
+ */
+int ppget_leng  (yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    return yyleng;
+}
+
+
+/** Get the current token.
+ * @param yyscanner The scanner object.
+ */
+
+char *ppget_text  (yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    return yytext;
+}
+
+
+
+/** Set the user-defined data. This data is never touched by the scanner.
+ * @param user_defined The data to be associated with this scanner.
+ * @param yyscanner The scanner object.
+ */
+void ppset_extra (YY_EXTRA_TYPE  user_defined , yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    yyextra = user_defined ;
+}
+
+
+
+/** Set the current line number.
+ * @param _line_number line number
+ * @param yyscanner The scanner object.
+ */
+void ppset_lineno (int  _line_number , yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+
+    
+        /* lineno is only valid if an input buffer exists. */
+        if (! YY_CURRENT_BUFFER )
+           YY_FATAL_ERROR( "ppset_lineno called with no buffer" );
+    
+    yylineno = _line_number;
+}
+
+
+
+
+/** Set the current column.
+ * @param _column_no column number
+ * @param yyscanner The scanner object.
+ */
+void ppset_column (int  _column_no , yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+
+    
+        /* column is only valid if an input buffer exists. */
+        if (! YY_CURRENT_BUFFER )
+           YY_FATAL_ERROR( "ppset_column called with no buffer" );
+    
+    yycolumn = _column_no;
+}
+
+
+
+
+
+/** Set the input stream. This does not discard the current
+ * input buffer.
+ * @param _in_str A readable stream.
+ * @param yyscanner The scanner object.
+ * @see pp_switch_to_buffer
+ */
+void ppset_in (FILE *  _in_str , yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    yyin = _in_str ;
+}
+
+
+
+void ppset_out (FILE *  _out_str , yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    yyout = _out_str ;
+}
+
+
+
+
+int ppget_debug  (yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    return yy_flex_debug;
+}
+
+
+
+void ppset_debug (int  _bdebug , yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    yy_flex_debug = _bdebug ;
+}
+
+
+/* Accessor methods for yylval and yylloc */
+
+
+YYSTYPE * ppget_lval  (yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    return yylval;
+}
+
+
+
+void ppset_lval (YYSTYPE *  yylval_param , yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    yylval = yylval_param;
+}
+
+
+
+    
+YYLTYPE *ppget_lloc  (yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    return yylloc;
+}
+    
+
+    
+void ppset_lloc (YYLTYPE *  yylloc_param , yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    yylloc = yylloc_param;
+}
+    
+
+
+
+
+/* User-visible API */
+
+/* pplex_init is special because it creates the scanner itself, so it is
+ * the ONLY reentrant function that doesn't take the scanner as the last argument.
+ * That's why we explicitly handle the declaration, instead of using our macros.
+ */
+
+int pplex_init(yyscan_t* ptr_yy_globals)
+
+{
+    if (ptr_yy_globals == NULL){
+        errno = EINVAL;
+        return 1;
+    }
+
+    *ptr_yy_globals = (yyscan_t) ppalloc ( sizeof( struct yyguts_t ), NULL );
+
+    if (*ptr_yy_globals == NULL){
+        errno = ENOMEM;
+        return 1;
+    }
+
+    /* By setting to 0xAA, we expose bugs in yy_init_globals. Leave at 0x00 for releases. */
+    memset(*ptr_yy_globals,0x00,sizeof(struct yyguts_t));
+
+    return yy_init_globals ( *ptr_yy_globals );
+}
+
+
+/* pplex_init_extra has the same functionality as pplex_init, but follows the
+ * convention of taking the scanner as the last argument. Note however, that
+ * this is a *pointer* to a scanner, as it will be allocated by this call (and
+ * is the reason, too, why this function also must handle its own declaration).
+ * The user defined value in the first argument will be available to ppalloc in
+ * the yyextra field.
+ */
+
+int pplex_init_extra(YY_EXTRA_TYPE yy_user_defined,yyscan_t* ptr_yy_globals )
+
+{
+    struct yyguts_t dummy_yyguts;
+
+    ppset_extra (yy_user_defined, &dummy_yyguts);
+
+    if (ptr_yy_globals == NULL){
+        errno = EINVAL;
+        return 1;
+    }
+	
+    *ptr_yy_globals = (yyscan_t) ppalloc ( sizeof( struct yyguts_t ), &dummy_yyguts );
+	
+    if (*ptr_yy_globals == NULL){
+        errno = ENOMEM;
+        return 1;
+    }
+    
+    /* By setting to 0xAA, we expose bugs in
+    yy_init_globals. Leave at 0x00 for releases. */
+    memset(*ptr_yy_globals,0x00,sizeof(struct yyguts_t));
+    
+    ppset_extra (yy_user_defined, *ptr_yy_globals);
+    
+    return yy_init_globals ( *ptr_yy_globals );
+}
+
+
+static int yy_init_globals (yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+    /* Initialization is the same as for the non-reentrant scanner.
+     * This function is called from pplex_destroy(), so don't allocate here.
+     */
+
+
+    yyg->yy_buffer_stack = NULL;
+    yyg->yy_buffer_stack_top = 0;
+    yyg->yy_buffer_stack_max = 0;
+    yyg->yy_c_buf_p = NULL;
+    yyg->yy_init = 0;
+    yyg->yy_start = 0;
+
+
+    yyg->yy_start_stack_ptr = 0;
+    yyg->yy_start_stack_depth = 0;
+    yyg->yy_start_stack =  NULL;
+
+
+
+
+
+
+/* Defined in main.c */
+#ifdef YY_STDINIT
+    yyin = stdin;
+    yyout = stdout;
+#else
+    yyin = NULL;
+    yyout = NULL;
+#endif
+
+    /* For future reference: Set errno on error, since we are called by
+     * pplex_init()
+     */
+    return 0;
+}
+
+
+/* pplex_destroy is for both reentrant and non-reentrant scanners. */
+int pplex_destroy  (yyscan_t yyscanner)
+{
+    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+
+    /* Pop the buffer stack, destroying each element. */
+	while(YY_CURRENT_BUFFER){
+		pp_delete_buffer(YY_CURRENT_BUFFER ,yyscanner );
+		YY_CURRENT_BUFFER_LVALUE = NULL;
+		pppop_buffer_state(yyscanner);
+	}
+
+	/* Destroy the stack itself. */
+	ppfree(yyg->yy_buffer_stack ,yyscanner);
+	yyg->yy_buffer_stack = NULL;
+
+
+    /* Destroy the start condition stack. */
+        ppfree(yyg->yy_start_stack ,yyscanner );
+        yyg->yy_start_stack = NULL;
+
+
+
+
+    /* Reset the globals. This is important in a non-reentrant scanner so the next time
+     * pplex() is called, initialization will occur. */
+    yy_init_globals( yyscanner);
+
+    /* Destroy the main struct (reentrant only). */
+    ppfree ( yyscanner , yyscanner );
+    yyscanner = NULL;
+    return 0;
+}
+
+
+
+/*
+ * Internal utility routines.
+ */
+
+
+
+#ifndef yytext_ptr
+static void yy_flex_strncpy (char* s1, yyconst char * s2, int n , yyscan_t yyscanner)
+{
+	struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+	(void)yyg;
+
+	int i;
+	for ( i = 0; i < n; ++i )
+		s1[i] = s2[i];
+}
+#endif
+
+
+
+#ifdef YY_NEED_STRLEN
+static int yy_flex_strlen (yyconst char * s , yyscan_t yyscanner)
+{
+	int n;
+	for ( n = 0; s[n]; ++n )
+		;
+
+	return n;
+}
+#endif
+
+
+
+void *ppalloc (yy_size_t  size , yyscan_t yyscanner)
+{
+	struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+	(void)yyg;
+	return malloc(size);
+}
+
+
+
+void *pprealloc  (void * ptr, yy_size_t  size , yyscan_t yyscanner)
+{
+	struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+	(void)yyg;
+
+	/* The cast to (char *) in the following accommodates both
+	 * implementations that use char* generic pointers, and those
+	 * that use void* generic pointers.  It works with the latter
+	 * because both ANSI C and C++ allow castless assignment from
+	 * any pointer type to void*, and deal with argument conversions
+	 * as though doing an assignment.
+	 */
+	return realloc(ptr, size);
+}
+
+
+
+void ppfree (void * ptr , yyscan_t yyscanner)
+{
+	struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
+	(void)yyg;
+	free( (char *) ptr );	/* see pprealloc() for (char *) cast */
+}
+
+
+#define YYTABLES_NAME "yytables"
+
+
+
+
+
+
+
+
+
+namespace pp {
+
+Tokenizer::Tokenizer(Diagnostics *diagnostics) : mHandle(nullptr), mMaxTokenSize(256)
+{
+    mContext.diagnostics = diagnostics;
+}
+
+Tokenizer::~Tokenizer()
+{
+    destroyScanner();
+}
+
+bool Tokenizer::init(size_t count, const char * const string[], const int length[])
+{
+    if ((count > 0) && (string == 0))
+        return false;
+
+    mContext.input = Input(count, string, length);
+    return initScanner();
+}
+
+void Tokenizer::setFileNumber(int file)
+{
+    // We use column number as file number.
+    // See macro yyfileno.
+    ppset_column(file,mHandle);
+}
+
+void Tokenizer::setLineNumber(int line)
+{
+    ppset_lineno(line,mHandle);
+}
+
+void Tokenizer::setMaxTokenSize(size_t maxTokenSize)
+{
+    mMaxTokenSize = maxTokenSize;
+}
+
+void Tokenizer::lex(Token *token)
+{
+    token->type = pplex(&token->text,&token->location,mHandle);
+    if (token->text.size() > mMaxTokenSize)
+    {
+        mContext.diagnostics->report(Diagnostics::PP_TOKEN_TOO_LONG,
+                                     token->location, token->text);
+        token->text.erase(mMaxTokenSize);
+    }
+
+    token->flags = 0;
+
+    token->setAtStartOfLine(mContext.lineStart);
+    mContext.lineStart = token->type == '\n';
+
+    token->setHasLeadingSpace(mContext.leadingSpace);
+    mContext.leadingSpace = false;
+}
+
+bool Tokenizer::initScanner()
+{
+    if ((mHandle == nullptr) && pplex_init_extra(&mContext, &mHandle))
+        return false;
+
+    pprestart(0,mHandle);
+    return true;
+}
+
+void Tokenizer::destroyScanner()
+{
+    if (mHandle == nullptr)
+        return;
+
+    pplex_destroy(mHandle);
+    mHandle = nullptr;
+}
+
+}  // namespace pp
+
+
diff --git a/gfx/angle/src/compiler/preprocessor/Tokenizer.h b/gfx/angle/src/compiler/preprocessor/Tokenizer.h
new file mode 100755
index 000000000..6dfb19c66
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/Tokenizer.h
@@ -0,0 +1,58 @@
+//
+// Copyright (c) 2012-2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_PREPROCESSOR_TOKENIZER_H_
+#define COMPILER_PREPROCESSOR_TOKENIZER_H_
+
+#include "common/angleutils.h"
+#include "compiler/preprocessor/Input.h"
+#include "compiler/preprocessor/Lexer.h"
+
+namespace pp
+{
+
+class Diagnostics;
+
+class Tokenizer : public Lexer
+{
+  public:
+    struct Context
+    {
+        Diagnostics *diagnostics;
+
+        Input input;
+        // The location where yytext points to. Token location should track
+        // scanLoc instead of Input::mReadLoc because they may not be the same
+        // if text is buffered up in the scanner input buffer.
+        Input::Location scanLoc;
+
+        bool leadingSpace;
+        bool lineStart;
+    };
+
+    Tokenizer(Diagnostics *diagnostics);
+    ~Tokenizer();
+
+    bool init(size_t count, const char * const string[], const int length[]);
+
+    void setFileNumber(int file);
+    void setLineNumber(int line);
+    void setMaxTokenSize(size_t maxTokenSize);
+
+    void lex(Token *token) override;
+
+  private:
+    bool initScanner();
+    void destroyScanner();
+
+    void *mHandle;  // Scanner handle.
+    Context mContext;  // Scanner extra.
+    size_t mMaxTokenSize; // Maximum token size
+};
+
+}  // namespace pp
+
+#endif  // COMPILER_PREPROCESSOR_TOKENIZER_H_
diff --git a/gfx/angle/src/compiler/preprocessor/Tokenizer.l b/gfx/angle/src/compiler/preprocessor/Tokenizer.l
new file mode 100755
index 000000000..62eb4caa6
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/Tokenizer.l
@@ -0,0 +1,357 @@
+/*
+//
+// Copyright (c) 2002-2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+This file contains the Lex specification for GLSL ES preprocessor.
+Based on Microsoft Visual Studio 2010 Preprocessor Grammar:
+http://msdn.microsoft.com/en-us/library/2scxys89.aspx
+
+IF YOU MODIFY THIS FILE YOU ALSO NEED TO RUN generate_parser.sh.
+*/
+
+%top{
+//
+// Copyright (c) 2011-2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// This file is auto-generated by generate_parser.sh. DO NOT EDIT!
+}
+
+%{
+#if defined(_MSC_VER)
+#pragma warning(disable: 4005)
+#endif
+
+#include "compiler/preprocessor/Tokenizer.h"
+
+#include "compiler/preprocessor/DiagnosticsBase.h"
+#include "compiler/preprocessor/Token.h"
+
+#if defined(__GNUC__)
+// Triggered by the auto-generated yy_fatal_error function.
+#pragma GCC diagnostic ignored "-Wmissing-noreturn"
+#elif defined(_MSC_VER)
+#pragma warning(disable: 4244)
+#endif
+
+// Workaround for flex using the register keyword, deprecated in C++11.
+#ifdef __cplusplus
+#if __cplusplus > 199711L
+#define register
+#endif
+#endif
+
+typedef std::string YYSTYPE;
+typedef pp::SourceLocation YYLTYPE;
+
+// Use the unused yycolumn variable to track file (string) number.
+#define yyfileno yycolumn
+
+#define YY_USER_INIT                   \
+    do {                               \
+        yyfileno = 0;                  \
+        yylineno = 1;                  \
+        yyextra->leadingSpace = false; \
+        yyextra->lineStart = true;     \
+    } while(0);
+
+#define YY_USER_ACTION                                              \
+    do                                                              \
+    {                                                               \
+        pp::Input* input = &yyextra->input;                         \
+        pp::Input::Location* scanLoc = &yyextra->scanLoc;           \
+        while ((scanLoc->sIndex < input->count()) &&                \
+               (scanLoc->cIndex >= input->length(scanLoc->sIndex))) \
+        {                                                           \
+            scanLoc->cIndex -= input->length(scanLoc->sIndex++);    \
+            ++yyfileno; yylineno = 1;                               \
+        }                                                           \
+        yylloc->file = yyfileno;                                    \
+        yylloc->line = yylineno;                                    \
+        scanLoc->cIndex += yyleng;                                  \
+    } while(0);
+
+#define YY_INPUT(buf, result, maxSize) \
+    result = yyextra->input.read(buf, maxSize, &yylineno);
+
+%}
+
+%option noyywrap nounput never-interactive
+%option reentrant bison-bridge bison-locations
+%option prefix="pp"
+%option extra-type="pp::Tokenizer::Context*"
+%x COMMENT
+
+NEWLINE     \n|\r|\r\n
+IDENTIFIER  [_a-zA-Z][_a-zA-Z0-9]*
+PUNCTUATOR  [][<>(){}.+-/*%^|&~=!:;,?]
+
+DECIMAL_CONSTANT      [1-9][0-9]*[uU]?
+OCTAL_CONSTANT        0[0-7]*[uU]?
+HEXADECIMAL_CONSTANT  0[xX][0-9a-fA-F]+[uU]?
+
+DIGIT                [0-9]
+EXPONENT_PART        [eE][+-]?{DIGIT}+
+FRACTIONAL_CONSTANT  ({DIGIT}*"."{DIGIT}+)|({DIGIT}+".")
+
+%%
+
+    /* Line comment */
+"//"[^\r\n]*
+
+    /* Block comment */
+    /* Line breaks are just counted - not returned. */
+    /* The comment is replaced by a single space. */
+"/*" { BEGIN(COMMENT); }
+<COMMENT>[^*\r\n]+
+<COMMENT>"*"
+<COMMENT>{NEWLINE} { ++yylineno; }
+<COMMENT>"*/" {
+    yyextra->leadingSpace = true;
+    BEGIN(INITIAL);
+}
+
+# {
+    // # is only valid at start of line for preprocessor directives.
+    yylval->assign(1, yytext[0]);
+    return yyextra->lineStart ? pp::Token::PP_HASH : pp::Token::PP_OTHER;
+}
+
+{IDENTIFIER} {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::IDENTIFIER;
+}
+
+({DECIMAL_CONSTANT}[uU]?)|({OCTAL_CONSTANT}[uU]?)|({HEXADECIMAL_CONSTANT}[uU]?) {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::CONST_INT;
+}
+
+({DIGIT}+{EXPONENT_PART}[fF]?)|({FRACTIONAL_CONSTANT}{EXPONENT_PART}?[fF]?) {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::CONST_FLOAT;
+}
+
+    /* Anything that starts with a {DIGIT} or .{DIGIT} must be a number. */
+    /* Rule to catch all invalid integers and floats. */
+({DIGIT}+[_a-zA-Z0-9.]*)|("."{DIGIT}+[_a-zA-Z0-9.]*) {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::PP_NUMBER;
+}
+
+"++" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_INC;
+}
+"--" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_DEC;
+}
+"<<" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_LEFT;
+}
+">>" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_RIGHT;
+}
+"<=" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_LE;
+}
+">=" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_GE;
+}
+"==" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_EQ;
+}
+"!=" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_NE;
+}
+"&&" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_AND;
+}
+"^^" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_XOR;
+}
+"||" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_OR;
+}
+"+=" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_ADD_ASSIGN;
+}
+"-=" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_SUB_ASSIGN;
+}
+"*=" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_MUL_ASSIGN;
+}
+"/=" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_DIV_ASSIGN;
+}
+"%=" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_MOD_ASSIGN;
+}
+"<<=" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_LEFT_ASSIGN;
+}
+">>=" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_RIGHT_ASSIGN;
+}
+"&=" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_AND_ASSIGN;
+}
+"^=" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_XOR_ASSIGN;
+}
+"|=" {
+    yylval->assign(yytext, yyleng);
+    return pp::Token::OP_OR_ASSIGN;
+}
+
+{PUNCTUATOR} {
+    yylval->assign(1, yytext[0]);
+    return yytext[0];
+}
+
+[ \t\v\f]+   { yyextra->leadingSpace = true; }
+
+{NEWLINE} {
+    ++yylineno;
+    yylval->assign(1, '\n');
+    return '\n';
+}
+
+\\{NEWLINE} { ++yylineno; }
+
+. {
+    yylval->assign(1, yytext[0]);
+    return pp::Token::PP_OTHER;
+}
+
+<*><<EOF>> {
+    // YY_USER_ACTION is not invoked for handling EOF.
+    // Set the location for EOF token manually.
+    pp::Input* input = &yyextra->input;
+    pp::Input::Location* scanLoc = &yyextra->scanLoc;
+    yy_size_t sIndexMax = input->count() ? input->count() - 1 : 0;
+    if (scanLoc->sIndex != sIndexMax)
+    {
+        // We can only reach here if there are empty strings at the
+        // end of the input.
+        scanLoc->sIndex = sIndexMax; scanLoc->cIndex = 0;
+        // FIXME: this is not 64-bit clean.
+        yyfileno = static_cast<int>(sIndexMax); yylineno = 1;
+    }
+    yylloc->file = yyfileno;
+    yylloc->line = yylineno;
+    yylval->clear();
+
+    if (YY_START == COMMENT)
+    {
+        yyextra->diagnostics->report(pp::Diagnostics::PP_EOF_IN_COMMENT,
+                                     pp::SourceLocation(yyfileno, yylineno),
+                                     "");
+    }
+    yyterminate();
+}
+
+%%
+
+namespace pp {
+
+Tokenizer::Tokenizer(Diagnostics *diagnostics) : mHandle(nullptr), mMaxTokenSize(256)
+{
+    mContext.diagnostics = diagnostics;
+}
+
+Tokenizer::~Tokenizer()
+{
+    destroyScanner();
+}
+
+bool Tokenizer::init(size_t count, const char * const string[], const int length[])
+{
+    if ((count > 0) && (string == 0))
+        return false;
+
+    mContext.input = Input(count, string, length);
+    return initScanner();
+}
+
+void Tokenizer::setFileNumber(int file)
+{
+    // We use column number as file number.
+    // See macro yyfileno.
+    yyset_column(file, mHandle);
+}
+
+void Tokenizer::setLineNumber(int line)
+{
+    yyset_lineno(line, mHandle);
+}
+
+void Tokenizer::setMaxTokenSize(size_t maxTokenSize)
+{
+    mMaxTokenSize = maxTokenSize;
+}
+
+void Tokenizer::lex(Token *token)
+{
+    token->type = yylex(&token->text, &token->location, mHandle);
+    if (token->text.size() > mMaxTokenSize)
+    {
+        mContext.diagnostics->report(Diagnostics::PP_TOKEN_TOO_LONG,
+                                     token->location, token->text);
+        token->text.erase(mMaxTokenSize);
+    }
+
+    token->flags = 0;
+
+    token->setAtStartOfLine(mContext.lineStart);
+    mContext.lineStart = token->type == '\n';
+
+    token->setHasLeadingSpace(mContext.leadingSpace);
+    mContext.leadingSpace = false;
+}
+
+bool Tokenizer::initScanner()
+{
+    if ((mHandle == nullptr) && yylex_init_extra(&mContext, &mHandle))
+        return false;
+
+    yyrestart(0, mHandle);
+    return true;
+}
+
+void Tokenizer::destroyScanner()
+{
+    if (mHandle == nullptr)
+        return;
+
+    yylex_destroy(mHandle);
+    mHandle = nullptr;
+}
+
+}  // namespace pp
+
diff --git a/gfx/angle/src/compiler/preprocessor/generate_parser.sh b/gfx/angle/src/compiler/preprocessor/generate_parser.sh
new file mode 100755
index 000000000..032858722
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/generate_parser.sh
@@ -0,0 +1,27 @@
+#!/bin/bash
+# Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Generates various components of GLSL ES preprocessor.
+
+run_flex()
+{
+input_file=$script_dir/$1
+output_source=$script_dir/$2
+flex --noline --nounistd --outfile=$output_source $input_file
+}
+
+run_bison()
+{
+input_file=$script_dir/$1
+output_source=$script_dir/$2
+bison --no-lines --skeleton=yacc.c --output=$output_source $input_file
+}
+
+script_dir=$(dirname $0)
+
+# Generate preprocessor
+run_flex Tokenizer.l Tokenizer.cpp
+run_bison ExpressionParser.y ExpressionParser.cpp
+patch --silent --forward < 64bit-tokenizer-safety.patch
diff --git a/gfx/angle/src/compiler/preprocessor/numeric_lex.h b/gfx/angle/src/compiler/preprocessor/numeric_lex.h
new file mode 100755
index 000000000..7cf976988
--- /dev/null
+++ b/gfx/angle/src/compiler/preprocessor/numeric_lex.h
@@ -0,0 +1,73 @@
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// numeric_lex.h: Functions to extract numeric values from string.
+
+#ifndef COMPILER_PREPROCESSOR_NUMERICLEX_H_
+#define COMPILER_PREPROCESSOR_NUMERICLEX_H_
+
+#include <cmath>
+#include <sstream>
+
+namespace pp {
+
+inline std::ios::fmtflags numeric_base_int(const std::string &str)
+{
+    if ((str.size() >= 2) &&
+        (str[0] == '0') &&
+        (str[1] == 'x' || str[1] == 'X'))
+    {
+        return std::ios::hex;
+    }
+    if ((str.size() >= 1) && (str[0] == '0'))
+    {
+        return std::ios::oct;
+    }
+    return std::ios::dec;
+}
+
+// The following functions parse the given string to extract a numerical
+// value of the given type. These functions assume that the string is
+// of the correct form. They can only fail if the parsed value is too big,
+// in which case false is returned.
+
+template<typename IntType>
+bool numeric_lex_int(const std::string &str, IntType *value)
+{
+    std::istringstream stream(str);
+    // This should not be necessary, but MSVS has a buggy implementation.
+    // It returns incorrect results if the base is not specified.
+    stream.setf(numeric_base_int(str), std::ios::basefield);
+
+    stream >> (*value);
+    return !stream.fail();
+}
+
+template<typename FloatType>
+bool numeric_lex_float(const std::string &str, FloatType *value)
+{
+// On 64-bit Intel Android, istringstream is broken.  Until this is fixed in
+// a newer NDK, don't use it.  Android doesn't have locale support, so this
+// doesn't have to force the C locale.
+// TODO(thakis): Remove this once this bug has been fixed in the NDK and
+// that NDK has been rolled into chromium.
+#if defined(ANGLE_PLATFORM_ANDROID) && __x86_64__
+    *value = strtod(str.c_str(), nullptr);
+    return errno != ERANGE;
+#else
+    std::istringstream stream(str);
+    // Force "C" locale so that decimal character is always '.', and
+    // not dependent on the current locale.
+    stream.imbue(std::locale::classic());
+
+    stream >> (*value);
+    return !stream.fail() && std::isfinite(*value);
+#endif
+}
+
+} // namespace pp.
+
+#endif // COMPILER_PREPROCESSOR_NUMERICLEX_H_