Changeset 221358 in webkit for trunk/Source/JavaScriptCore/parser/ASTBuilder.h

Timestamp:

Aug 30, 2017, 2:51:45 AM (8 years ago)

Author:

[email protected]

Message:

[ESNext] Async iteration - Implement async iteration statement: for-await-of
​https://bugs.webkit.org/show_bug.cgi?id=166698

Reviewed by Yusuke Suzuki.

JSTests:

• stress/async-iteration-for-await-of-syntax.js: Added.

(assert):
(checkSyntax):
(checkSyntaxError):
(checkSimpleAsyncGeneratorSloppyMode):
(checkSimpleAsyncGeneratorStrictMode):
(checkNestedAsyncGenerators):
(checkSimpleAsyncGeneratorSyntaxErrorInStrictMode):

• stress/async-iteration-for-await-of.js: Added.

(assert):
(async.foo):
(async.boo):
(const.boo.async):

Source/JavaScriptCore:

Implementation of the for-await-of statement.

• bytecompiler/BytecodeGenerator.cpp:

(JSC::BytecodeGenerator::emitEnumeration):
(JSC::BytecodeGenerator::emitIteratorNext):

• bytecompiler/BytecodeGenerator.h:
• parser/ASTBuilder.h:

(JSC::ASTBuilder::createForOfLoop):

• parser/NodeConstructors.h:

(JSC::ForOfNode::ForOfNode):

• parser/Nodes.h:

(JSC::ForOfNode::isForAwait const):

• parser/Parser.cpp:

(JSC::Parser<LexerType>::parseForStatement):

• parser/Parser.h:

(JSC::Scope::setSourceParseMode):
(JSC::Scope::setIsFunction):
(JSC::Scope::setIsAsyncGeneratorFunction):
(JSC::Scope::setIsAsyncGeneratorFunctionBody):

• parser/SyntaxChecker.h:

(JSC::SyntaxChecker::createForOfLoop):

File:

• trunk/Source/JavaScriptCore/parser/ASTBuilder.h (modified) (2 diffs)

trunk/Source/JavaScriptCore/parser/ASTBuilder.h

@@ -603 +603 @@
     }
     
-    StatementNode* createForOfLoop(const JSTokenLocation& location, ExpressionNode* lhs, ExpressionNode* iter, StatementNode* statements, const JSTokenLocation&, const JSTextPosition& eStart, const JSTextPosition& eDivot, const JSTextPosition& eEnd, int start, int end, VariableEnvironment& lexicalVariables)
-    {
-        ForOfNode* result = new (m_parserArena) ForOfNode(location, lhs, iter, statements, lexicalVariables);
+    StatementNode* createForOfLoop(bool isForAwait, const JSTokenLocation& location, ExpressionNode* lhs, ExpressionNode* iter, StatementNode* statements, const JSTokenLocation&, const JSTextPosition& eStart, const JSTextPosition& eDivot, const JSTextPosition& eEnd, int start, int end, VariableEnvironment& lexicalVariables)
+    {
+        ForOfNode* result = new (m_parserArena) ForOfNode(isForAwait, location, lhs, iter, statements, lexicalVariables);
         result->setLoc(start, end, location.startOffset, location.lineStartOffset);
         setExceptionLocation(result, eStart, eDivot, eEnd);
@@ -611 +611 @@
     }
     
-    StatementNode* createForOfLoop(const JSTokenLocation& location, DestructuringPatternNode* pattern, ExpressionNode* iter, StatementNode* statements, const JSTokenLocation& declLocation, const JSTextPosition& eStart, const JSTextPosition& eDivot, const JSTextPosition& eEnd, int start, int end, VariableEnvironment& lexicalVariables)
+    StatementNode* createForOfLoop(bool isForAwait, const JSTokenLocation& location, DestructuringPatternNode* pattern, ExpressionNode* iter, StatementNode* statements, const JSTokenLocation& declLocation, const JSTextPosition& eStart, const JSTextPosition& eDivot, const JSTextPosition& eEnd, int start, int end, VariableEnvironment& lexicalVariables)
     {
         auto lexpr = new (m_parserArena) DestructuringAssignmentNode(declLocation, pattern, nullptr);
-        return createForOfLoop(location, lexpr, iter, statements, declLocation, eStart, eDivot, eEnd, start, end, lexicalVariables);
+        return createForOfLoop(isForAwait, location, lexpr, iter, statements, declLocation, eStart, eDivot, eEnd, start, end, lexicalVariables);
     }