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authorGaming4JC <g4jc@hyperbola.info>2019-06-08 14:34:29 -0400
committerGaming4JC <g4jc@hyperbola.info>2019-07-18 22:38:14 -0400
commit987d6726f3c64d1cc510acba1de08deb5e0a7702 (patch)
treec702bdece9150f6bea90ea2850daa3d3aac042b8 /js/src/frontend
parentf319f49a5280a7ba37cb551a7236505e496ae34a (diff)
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1296814 - Move FunctionDeclaration-as-consequent/alternative handling out of Parser::functionStmt into Parser::consequentOrAlternative.
Diffstat (limited to 'js/src/frontend')
-rw-r--r--js/src/frontend/Parser.cpp56
1 files changed, 24 insertions, 32 deletions
diff --git a/js/src/frontend/Parser.cpp b/js/src/frontend/Parser.cpp
index 3c509465f..8f52f1d27 100644
--- a/js/src/frontend/Parser.cpp
+++ b/js/src/frontend/Parser.cpp
@@ -3550,21 +3550,6 @@ Parser<ParseHandler>::functionStmt(uint32_t preludeStart, YieldHandling yieldHan
{
MOZ_ASSERT(tokenStream.isCurrentTokenType(TOK_FUNCTION));
- // Annex B.3.4 says we can parse function declarations unbraced under if
- // or else as if it were braced. That is, |if (x) function f() {}| is
- // parsed as |if (x) { function f() {} }|.
- Maybe<ParseContext::Statement> synthesizedStmtForAnnexB;
- Maybe<ParseContext::Scope> synthesizedScopeForAnnexB;
- if (!pc->sc()->strict()) {
- ParseContext::Statement* stmt = pc->innermostStatement();
- if (stmt && stmt->kind() == StatementKind::If) {
- synthesizedStmtForAnnexB.emplace(pc, StatementKind::Block);
- synthesizedScopeForAnnexB.emplace(this);
- if (!synthesizedScopeForAnnexB->init(pc))
- return null();
- }
- }
-
// In sloppy mode, Annex B.3.2 allows labelled function declarations.
// Otherwise it's a parse error.
ParseContext::Statement* declaredInStmt = pc->innermostStatement();
@@ -3645,20 +3630,8 @@ Parser<ParseHandler>::functionStmt(uint32_t preludeStart, YieldHandling yieldHan
return null();
YieldHandling newYieldHandling = GetYieldHandling(generatorKind, asyncKind);
- Node fun = functionDefinition(preludeStart, pn, InAllowed, newYieldHandling,
+ return functionDefinition(preludeStart, pn, InAllowed, newYieldHandling,
name, Statement, generatorKind, asyncKind, tryAnnexB);
- if (!fun)
- return null();
-
- if (synthesizedStmtForAnnexB) {
- Node synthesizedStmtList = handler.newStatementList(handler.getPosition(fun));
- if (!synthesizedStmtList)
- return null();
- handler.addStatementToList(synthesizedStmtList, fun);
- return finishLexicalScope(*synthesizedScopeForAnnexB, synthesizedStmtList);
- }
-
- return fun;
}
template <typename ParseHandler>
@@ -5276,13 +5249,32 @@ Parser<ParseHandler>::consequentOrAlternative(YieldHandling yieldHandling)
return null();
if (next == TOK_FUNCTION) {
- // Apply Annex B.3.4 in non-strict code to allow FunctionDeclaration as
- // the consequent/alternative of an |if| or |else|. Parser::statement
- // will report the strict mode error.
+ // Annex B.3.4 says that unbraced function declarations under if/else
+ // in non-strict code act as if they were braced. That is,
+ // |if (x) function f() {}| is parsed as |if (x) { function f() {} }|.
if (!pc->sc()->strict()) {
tokenStream.consumeKnownToken(next, TokenStream::Operand);
- return functionStmt(pos().begin, yieldHandling, NameRequired);
+
+ ParseContext::Statement stmt(pc, StatementKind::Block);
+ ParseContext::Scope scope(this);
+ if (!scope.init(pc))
+ return null();
+
+ TokenPos funcPos = pos();
+ Node fun = functionStmt(pos().begin, yieldHandling, NameRequired);
+ if (!fun)
+ return null();
+
+ Node block = handler.newStatementList(funcPos);
+ if (!block)
+ return null();
+
+ handler.addStatementToList(block, fun);
+ return finishLexicalScope(scope, block);
}
+
+ // Function declarations are a syntax error in strict mode code.
+ // Parser::statement reports that error.
}
return statement(yieldHandling);