Roll back to ANGLE/2845

1 files changed, 25 insertions, 13 deletions

diff --git a/gfx/angle/src/compiler/preprocessor/MacroExpander.h b/gfx/angle/src/compiler/preprocessor/MacroExpander.h
index 3a8450f5e..dbf980308 100755
--- a/gfx/angle/src/compiler/preprocessor/MacroExpander.h
+++ b/gfx/angle/src/compiler/preprocessor/MacroExpander.h
@@ -7,11 +7,13 @@
 #ifndef COMPILER_PREPROCESSOR_MACROEXPANDER_H_
 #define COMPILER_PREPROCESSOR_MACROEXPANDER_H_
 
+#include <cassert>
 #include <memory>
 #include <vector>
 
-#include "compiler/preprocessor/Lexer.h"
-#include "compiler/preprocessor/Macro.h"
+#include "Lexer.h"
+#include "Macro.h"
+#include "pp_utils.h"
 
 namespace pp
 {
@@ -28,6 +30,8 @@ class MacroExpander : public Lexer
     void lex(Token *token) override;
 
   private:
+    PP_DISALLOW_COPY_AND_ASSIGN(MacroExpander);
+
     void getToken(Token *token);
     void ungetToken(const Token &token);
     bool isNextTokenLeftParen();
@@ -50,14 +54,28 @@ class MacroExpander : public Lexer
 
     struct MacroContext
     {
-        MacroContext();
-        bool empty() const;
-        const Token &get();
-        void unget();
-
         const Macro *macro;
         std::size_t index;
         std::vector<Token> replacements;
+
+        MacroContext()
+            : macro(0),
+              index(0)
+        {
+        }
+        bool empty() const
+        {
+            return index == replacements.size();
+        }
+        const Token &get()
+        {
+            return replacements[index++];
+        }
+        void unget()
+        {
+            assert(index > 0);
+            --index;
+        }
     };
 
     Lexer *mLexer;
@@ -66,12 +84,6 @@ class MacroExpander : public Lexer
 
     std::unique_ptr<Token> mReserveToken;
     std::vector<MacroContext *> mContextStack;
-    size_t mTotalTokensInContexts;
-
-    bool mDeferReenablingMacros;
-    std::vector<const Macro *> mMacrosToReenable;
-
-    class ScopedMacroReenabler;
 };
 
 }  // namespace pp