[ES6] Support Generator Syntax
https://bugs.webkit.org/show_bug.cgi?id=150769
Reviewed by Geoffrey Garen.
.:
Added ENABLE_ES6_GENERATORS flag.
- Source/cmake/OptionsWin.cmake:
- Source/cmake/WebKitFeatures.cmake:
Source/JavaScriptCore:
This patch implements syntax part of ES6 Generators.
- Add ENABLE_ES6_GENERATORS compile time flag. It is disabled by default, and will be enabled once ES6 generator functionality is implemented.
- Add lexer support for YIELD. It changes "yield" from reserved-if-strict word to keyword. And it is correct under the ES6 spec.
- Implement parsing functionality and YieldExprNode stub. YieldExprNode does not emit meaningful bytecodes yet. This should be implemented in the future patch.
- Accept "yield" Identifier as an label etc. under sloppy mode && non-generator code. http://ecma-international.org/ecma-262/6.0/#sec-generator-function-definitions-static-semantics-early-errors
- Configurations/FeatureDefines.xcconfig:
- bytecompiler/NodesCodegen.cpp:
(JSC::YieldExprNode::emitBytecode):
(JSC::ASTBuilder::createYield):
- parser/Keywords.table:
- parser/NodeConstructors.h:
(JSC::YieldExprNode::YieldExprNode):
- parser/Nodes.h:
- parser/Parser.cpp:
(JSC::Parser<LexerType>::Parser):
(JSC::Parser<LexerType>::parseInner):
(JSC::Parser<LexerType>::parseStatementListItem):
(JSC::Parser<LexerType>::parseVariableDeclarationList):
(JSC::Parser<LexerType>::parseDestructuringPattern):
(JSC::Parser<LexerType>::parseBreakStatement):
(JSC::Parser<LexerType>::parseContinueStatement):
(JSC::Parser<LexerType>::parseTryStatement):
(JSC::Parser<LexerType>::parseStatement):
(JSC::stringForFunctionMode):
(JSC::Parser<LexerType>::parseFunctionParameters):
(JSC::Parser<LexerType>::parseFunctionInfo):
(JSC::Parser<LexerType>::parseFunctionDeclaration):
(JSC::Parser<LexerType>::parseClass):
(JSC::Parser<LexerType>::parseExpressionOrLabelStatement):
(JSC::Parser<LexerType>::parseExportDeclaration):
(JSC::Parser<LexerType>::parseAssignmentExpression):
(JSC::Parser<LexerType>::parseYieldExpression):
(JSC::Parser<LexerType>::parseProperty):
(JSC::Parser<LexerType>::parsePropertyMethod):
(JSC::Parser<LexerType>::parseGetterSetter):
(JSC::Parser<LexerType>::parseFunctionExpression):
(JSC::Parser<LexerType>::parsePrimaryExpression):
(JSC::Parser<LexerType>::parseArrowFunctionExpression):
(JSC::Scope::Scope):
(JSC::Scope::setSourceParseMode):
(JSC::Scope::isGenerator):
(JSC::Scope::setIsFunction):
(JSC::Scope::setIsGenerator):
(JSC::Scope::setIsModule):
(JSC::Parser::pushScope):
(JSC::Parser::isYIELDMaskedAsIDENT):
(JSC::Parser::matchSpecIdentifier):
(JSC::Parser::saveState):
(JSC::Parser::restoreState):
(JSC::isFunctionParseMode):
(JSC::isModuleParseMode):
(JSC::isProgramParseMode):
- parser/ParserTokens.h:
- parser/SyntaxChecker.h:
(JSC::SyntaxChecker::createYield):
- tests/stress/generator-methods.js: Added.
(Hello.prototype.gen):
(Hello.gen):
(Hello):
(Hello.prototype.set get string_appeared_here):
(Hello.string_appeared_here):
(Hello.prototype.20):
(Hello.20):
(Hello.prototype.42):
(Hello.42):
(let.object.gen):
(let.object.set get string_appeared_here):
(let.object.20):
(let.object.42):
- tests/stress/generator-syntax.js: Added.
(testSyntax):
(testSyntaxError):
(testSyntaxError.Hello.prototype.get gen):
(testSyntaxError.Hello):
(SyntaxError.Unexpected.token.string_appeared_here.Expected.an.opening.string_appeared_here.before.a.method.testSyntaxError.Hello.prototype.set gen):
(SyntaxError.Unexpected.token.string_appeared_here.Expected.an.opening.string_appeared_here.before.a.method.testSyntaxError.Hello):
(SyntaxError.Unexpected.token.string_appeared_here.Expected.an.opening.string_appeared_here.before.a.method.testSyntaxError.gen):
(testSyntaxError.value):
(testSyntaxError.gen.ng):
(testSyntaxError.gen):
(testSyntax.gen):
- tests/stress/yield-and-line-terminator.js: Added.
(testSyntax):
(testSyntaxError):
(testSyntax.gen):
(testSyntaxError.gen):
- tests/stress/yield-label-generator.js: Added.
(testSyntax):
(testSyntaxError):
(testSyntaxError.test):
(SyntaxError.Unexpected.keyword.string_appeared_here.Expected.an.identifier.as.the.target.a.continue.statement.testSyntax.test):
- tests/stress/yield-label.js: Added.
(yield):
(testSyntaxError):
(testSyntaxError.test):
- tests/stress/yield-named-accessors-generator.js: Added.
(t1.let.object.get yield):
(t1.let.object.set yield):
(t1):
(t2.let.object.get yield):
(t2.let.object.set yield):
(t2):
- tests/stress/yield-named-accessors.js: Added.
(t1.let.object.get yield):
(t1.let.object.set yield):
(t1):
(t2.let.object.get yield):
(t2.let.object.set yield):
(t2):
- tests/stress/yield-named-variable-generator.js: Added.
(testSyntax):
(testSyntaxError):
(testSyntaxError.t1):
(testSyntaxError.t1.yield):
(testSyntax.t1.yield):
(testSyntax.t1):
- tests/stress/yield-named-variable.js: Added.
(testSyntax):
(testSyntaxError):
(testSyntax.t1):
(testSyntaxError.t1):
(testSyntax.t1.yield):
(testSyntaxError.t1.yield):
- tests/stress/yield-out-of-generator.js: Added.
(testSyntax):
(testSyntaxError):
(testSyntaxError.hello):
(testSyntaxError.gen.hello):
(testSyntaxError.gen):
(testSyntax.gen):
(testSyntax.gen.ok):
(testSyntaxError.gen.ok):
Source/WebCore:
Added ENABLE_ES6_GENERATORS flag.
- Configurations/FeatureDefines.xcconfig:
Source/WebKit/mac:
Added ENABLE_ES6_GENERATORS flag.
- Configurations/FeatureDefines.xcconfig:
Source/WebKit2:
Added ENABLE_ES6_GENERATORS flag.
- Configurations/FeatureDefines.xcconfig:
Source/WTF:
Added ENABLE_ES6_GENERATORS flag.
Tools:
Added ENABLE_ES6_GENERATORS flag.
- Scripts/webkitperl/FeatureList.pm:
WebKitLibraries:
Added ENABLE_ES6_GENERATORS flag.
- win/tools/vsprops/FeatureDefines.props:
- win/tools/vsprops/FeatureDefinesCairo.props:
LayoutTests:
Change "yield" from reserved-if-strict word to keyword.
http://ecma-international.org/ecma-262/6.0/#sec-keywords
- js/dom/reserved-words-as-property-expected.txt:
- js/keywords-and-reserved_words-expected.txt:
- js/let-syntax-expected.txt:
- js/reserved-words-strict-expected.txt:
- js/script-tests/keywords-and-reserved_words.js:
- js/script-tests/reserved-words-strict.js:
