commit | facf59d4890df3ecd72314ae8f3f81797df455ca | [log] [tgz] |
---|---|---|
author | ross.kirsling@sony.com <ross.kirsling@sony.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> | Thu May 16 20:08:22 2019 +0000 |
committer | ross.kirsling@sony.com <ross.kirsling@sony.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> | Thu May 16 20:08:22 2019 +0000 |
tree | 277d3f84afce93de0d22232b19444b782aeafb26 | |
parent | 3ba1e74664afd54ad1ad1460d5b8c205c262535a [diff] |
[JSC] Invalid AssignmentTargetType should be an early error. https://bugs.webkit.org/show_bug.cgi?id=197603 Reviewed by Keith Miller. JSTests: * test262/expectations.yaml: Update expectations to reflect new SyntaxErrors. (Ideally, these should all be viewed as passing in the near future.) * stress/async-await-basic.js: * stress/big-int-literals.js: Update tests to reflect new SyntaxErrors. * ChakraCore.yaml: * ChakraCore/test/EH/try6.baseline-jsc: * ChakraCore/test/Error/variousErrors3.baseline-jsc: Added. Update baselines to reflect new SyntaxErrors. Source/JavaScriptCore: Since ES6, expressions like 0++, ++0, 0 = 0, and 0 += 0 are all specified as early errors: https://tc39.github.io/ecma262/#sec-update-expressions-static-semantics-early-errors https://tc39.github.io/ecma262/#sec-assignment-operators-static-semantics-early-errors We currently throw late ReferenceErrors for these -- let's turn them into early SyntaxErrors. (This is based on the expectation that https://github.com/tc39/ecma262/pull/1527 will be accepted; if that doesn't come to pass, we can subsequently introduce early ReferenceError and revise these.) * bytecompiler/NodesCodegen.cpp: (JSC::PostfixNode::emitBytecode): Add an assert for "function call LHS" case. (JSC::PrefixNode::emitBytecode): Add an assert for "function call LHS" case. * parser/ASTBuilder.h: (JSC::ASTBuilder::isLocation): Added. (JSC::ASTBuilder::isAssignmentLocation): Fix misleading parameter name. (JSC::ASTBuilder::isFunctionCall): Added. (JSC::ASTBuilder::makeAssignNode): Add an assert for "function call LHS" case. * parser/SyntaxChecker.h: (JSC::SyntaxChecker::isLocation): Added. (JSC::SyntaxChecker::isAssignmentLocation): Fix incorrect definition and align with ASTBuilder. (JSC::SyntaxChecker::isFunctionCall): Added. * parser/Nodes.h: (JSC::ExpressionNode::isFunctionCall const): Added. Ensure that the parser can check whether an expression node is a function call. * parser/Parser.cpp: (JSC::Parser<LexerType>::isSimpleAssignmentTarget): Added. (JSC::Parser<LexerType>::parseAssignmentExpression): (JSC::Parser<LexerType>::parseUnaryExpression): See below. * parser/Parser.h: Throw SyntaxError whenever an assignment or update expression's target is invalid. Unfortunately, it seems that web compatibility obliges us to exempt the "function call LHS" case in sloppy mode. (https://github.com/tc39/ecma262/issues/257#issuecomment-195106880) Additional cleanup items: - Make use of `semanticFailIfTrue` for `isMetaProperty` checks, as it's equivalent. - Rename `requiresLExpr` to `hasPrefixUpdateOp` since it's now confusing, and get rid of `modifiesExpr` since it refers to the exact same condition. - Stop setting `lastOperator` near the end -- one case was incorrect and regardless neither is used. LayoutTests: * fast/events/window-onerror4-expected.txt: * ietestcenter/Javascript/11.13.1-1-1-expected.txt: * ietestcenter/Javascript/11.13.1-1-2-expected.txt: * ietestcenter/Javascript/11.13.1-1-3-expected.txt: * ietestcenter/Javascript/11.13.1-1-4-expected.txt: * js/basic-strict-mode-expected.txt: * js/dom/assign-expected.txt: * js/dom/line-column-numbers-expected.txt: * js/dom/line-column-numbers.html: * js/dom/postfix-syntax-expected.txt: * js/dom/prefix-syntax-expected.txt: * js/dom/script-tests/line-column-numbers.js: * js/function-toString-parentheses-expected.txt: * js/parser-syntax-check-expected.txt: * js/parser-xml-close-comment-expected.txt: * js/script-tests/function-toString-parentheses.js: * js/script-tests/parser-syntax-check.js: Update tests & expectations to reflect new SyntaxErrors. * js/script-tests/toString-prefix-postfix-preserve-parens.js: * js/toString-prefix-postfix-preserve-parens-expected.txt: None of the prefix/postfix tests make sense here now that they're all SyntaxErrors; remove them and just leave the typeof tests. git-svn-id: http://svn.webkit.org/repository/webkit/trunk@245406 268f45cc-cd09-0410-ab3c-d52691b4dbfc
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