Changeset 220323 in webkit for trunk/Source/JavaScriptCore/parser/ASTBuilder.h

Timestamp:

Aug 6, 2017, 6:04:32 AM (8 years ago)

Author:

[email protected]

Message:

[Next] Async iteration - Implement Async Generator - parser
​https://bugs.webkit.org/show_bug.cgi?id=175210

Reviewed by Yusuke Suzuki.

JSTests:

• stress/async-await-syntax.js:

(testTopLevelAsyncAwaitSyntaxSloppyMode.testSyntax):

• stress/async-iteration-syntax.js: Added.

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

• stress/generator-class-methods-syntax.js:

Source/JavaScriptCore:

Current implementation is draft version of Async Iteration.
Link to spec ​https://tc39.github.io/proposal-async-iteration/

Current patch implement only parser part of the Async generator
Runtime part will be in next ptches

• parser/ASTBuilder.h:

(JSC::ASTBuilder::createFunctionMetadata):

• parser/Parser.cpp:

(JSC::getAsynFunctionBodyParseMode):
(JSC::Parser<LexerType>::parseInner):
(JSC::Parser<LexerType>::parseAsyncFunctionSourceElements):
(JSC::Parser<LexerType>::parseAsyncGeneratorFunctionSourceElements):
(JSC::stringArticleForFunctionMode):
(JSC::stringForFunctionMode):
(JSC::Parser<LexerType>::parseFunctionInfo):
(JSC::Parser<LexerType>::parseAsyncFunctionDeclaration):
(JSC::Parser<LexerType>::parseClass):
(JSC::Parser<LexerType>::parseProperty):
(JSC::Parser<LexerType>::parsePropertyMethod):
(JSC::Parser<LexerType>::parseAsyncFunctionExpression):

• parser/Parser.h:

(JSC::Scope::setSourceParseMode):

• parser/ParserModes.h:

(JSC::isFunctionParseMode):
(JSC::isAsyncFunctionParseMode):
(JSC::isAsyncArrowFunctionParseMode):
(JSC::isAsyncGeneratorFunctionParseMode):
(JSC::isAsyncFunctionOrAsyncGeneratorWrapperParseMode):
(JSC::isAsyncFunctionWrapperParseMode):
(JSC::isAsyncFunctionBodyParseMode):
(JSC::isGeneratorMethodParseMode):
(JSC::isAsyncMethodParseMode):
(JSC::isAsyncGeneratorMethodParseMode):
(JSC::isMethodParseMode):
(JSC::isGeneratorOrAsyncFunctionBodyParseMode):
(JSC::isGeneratorOrAsyncFunctionWrapperParseMode):

File:

• trunk/Source/JavaScriptCore/parser/ASTBuilder.h (modified) (1 diff)

trunk/Source/JavaScriptCore/parser/ASTBuilder.h

@@ -438 +438 @@
         SourceParseMode mode, bool isArrowFunctionBodyExpression)
     {
+        SourceParseMode bodySourceParseMode = mode;
+        if (mode == SourceParseMode::AsyncGeneratorBodyMode) {
+            ASSERT(Options::useAsyncIterator());
+            bodySourceParseMode = SourceParseMode::AsyncFunctionBodyMode;
+        } else if (mode == SourceParseMode::AsyncGeneratorWrapperFunctionMode) {
+            ASSERT(Options::useAsyncIterator());
+            bodySourceParseMode = SourceParseMode::ArrowFunctionMode;
+        } else if (mode == SourceParseMode::AsyncGeneratorWrapperMethodMode) {
+            ASSERT(Options::useAsyncIterator());
+            bodySourceParseMode = SourceParseMode::AsyncMethodMode;
+        }
+
         return new (m_parserArena) FunctionMetadataNode(
             m_parserArena, startLocation, endLocation, startColumn, endColumn, 
             functionKeywordStart, functionNameStart, parametersStart, 
             inStrictContext, constructorKind, superBinding,
-            parameterCount, mode, isArrowFunctionBodyExpression);
+            parameterCount, bodySourceParseMode, isArrowFunctionBodyExpression);
     }