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commit 74672745e6d1932a4aa7fa6a8cd6ab09fd9de4fe Author: wolfbeast <[email protected]> Date: Sat Apr 6 11:05:22 2019 +0200 Simplify checking of targets within destructuring patterns. --- js/src/frontend/Parser.cpp | 86 ++++++++-------------------------------------- js/src/frontend/Parser.h | 9 ----- js/src/js.msg | 1 - 3 files changed, 14 insertions(+), 82 deletions(-) diff --git a/js/src/frontend/Parser.cpp b/js/src/frontend/Parser.cpp index 5c4d509..3e7c25c 100644 --- a/js/src/frontend/Parser.cpp +++ b/js/src/frontend/Parser.cpp @@ -4113,22 +4113,23 @@ Parser<FullParseHandler>::checkDestructuringName(ParseNode* expr, Maybe<Declarat } // Otherwise this is an expression in destructuring outside a declaration. - if (!reportIfNotValidSimpleAssignmentTarget(expr, KeyedDestructuringAssignment)) - return false; - - MOZ_ASSERT(!handler.isFunctionCall(expr), - "function calls shouldn't be considered valid targets in " - "destructuring patterns"); - if (handler.isNameAnyParentheses(expr)) { - // The arguments/eval identifiers are simple in non-strict mode code. - // Warn to discourage their use nonetheless. - return reportIfArgumentsEvalTarget(expr); + if (const char* chars = handler.nameIsArgumentsEvalAnyParentheses(expr, context)) { + if (!reportWithNode(ParseStrictError, pc->sc()->strict(), expr, + JSMSG_BAD_STRICT_ASSIGN, chars)) + { + return false; + } + } + + return true; } - // Nothing further to do for property accesses. - MOZ_ASSERT(handler.isPropertyAccess(expr)); - return true; + if (handler.isPropertyAccess(expr)) + return true; + + reportWithNode(ParseError, pc->sc()->strict(), expr, JSMSG_BAD_DESTRUCT_TARGET); + return false; } template <> @@ -7775,65 +7776,6 @@ Parser<ParseHandler>::isValidSimpleAssignmentTarget(Node node, template <typename ParseHandler> bool -Parser<ParseHandler>::reportIfArgumentsEvalTarget(Node nameNode) -{ - const char* chars = handler.nameIsArgumentsEvalAnyParentheses(nameNode, context); - if (!chars) - return true; - - bool strict = pc->sc()->strict(); - if (!reportWithNode(ParseStrictError, strict, nameNode, JSMSG_BAD_STRICT_ASSIGN, chars)) - return false; - - MOZ_ASSERT(!strict, - "an error should have been reported if this was strict mode " - "code"); - return true; -} - -template <typename ParseHandler> -bool -Parser<ParseHandler>::reportIfNotValidSimpleAssignmentTarget(Node target, AssignmentFlavor flavor) -{ - FunctionCallBehavior behavior = flavor == KeyedDestructuringAssignment - ? ForbidAssignmentToFunctionCalls - : PermitAssignmentToFunctionCalls; - if (isValidSimpleAssignmentTarget(target, behavior)) - return true; - - if (handler.isNameAnyParentheses(target)) { - // Use a special error if the target is arguments/eval. This ensures - // targeting these names is consistently a SyntaxError (which error numbers - // below don't guarantee) while giving us a nicer error message. - if (!reportIfArgumentsEvalTarget(target)) - return false; - } - - unsigned errnum = 0; - const char* extra = nullptr; - - switch (flavor) { - case IncrementAssignment: - errnum = JSMSG_BAD_OPERAND; - extra = "increment"; - break; - - case DecrementAssignment: - errnum = JSMSG_BAD_OPERAND; - extra = "decrement"; - break; - - case KeyedDestructuringAssignment: - errnum = JSMSG_BAD_DESTRUCT_TARGET; - break; - } - - reportWithNode(ParseError, pc->sc()->strict(), target, errnum, extra); - return false; -} - -template <typename ParseHandler> -bool Parser<ParseHandler>::checkAndMarkAsIncOperand(Node target) { if (handler.isNameAnyParentheses(target)) { diff --git a/js/src/frontend/Parser.h b/js/src/frontend/Parser.h index c50f8e4..0baaac3 100644 --- a/js/src/frontend/Parser.h +++ b/js/src/frontend/Parser.h @@ -1331,12 +1331,6 @@ class Parser final : private JS::AutoGCRooter, public StrictModeGetter #endif } - enum AssignmentFlavor { - KeyedDestructuringAssignment, - IncrementAssignment, - DecrementAssignment, - }; - bool matchInOrOf(bool* isForInp, bool* isForOfp); bool hasUsedFunctionSpecialName(HandlePropertyName name); @@ -1374,9 +1368,6 @@ class Parser final : private JS::AutoGCRooter, public StrictModeGetter FunctionCallBehavior behavior = ForbidAssignmentToFunctionCalls); private: - bool reportIfArgumentsEvalTarget(Node nameNode); - bool reportIfNotValidSimpleAssignmentTarget(Node target, AssignmentFlavor flavor); - bool checkAndMarkAsIncOperand(Node kid); bool checkStrictAssignment(Node lhs); bool checkStrictBinding(PropertyName* name, TokenPos pos); diff --git a/js/src/js.msg b/js/src/js.msg index 2901b88..4ded69a 100644 --- a/js/src/js.msg +++ b/js/src/js.msg @@ -205,7 +205,6 @@ MSG_DEF(JSMSG_BAD_GENEXP_BODY, 1, JSEXN_SYNTAXERR, "illegal use of {0} i MSG_DEF(JSMSG_BAD_INCOP_OPERAND, 0, JSEXN_SYNTAXERR, "invalid increment/decrement operand") MSG_DEF(JSMSG_BAD_METHOD_DEF, 0, JSEXN_SYNTAXERR, "bad method definition") MSG_DEF(JSMSG_BAD_OCTAL, 1, JSEXN_SYNTAXERR, "{0} is not a legal ECMA-262 octal constant") -MSG_DEF(JSMSG_BAD_OPERAND, 1, JSEXN_SYNTAXERR, "invalid {0} operand") MSG_DEF(JSMSG_BAD_POW_LEFTSIDE, 0, JSEXN_SYNTAXERR, "unparenthesized unary expression can't appear on the left-hand side of '**'") MSG_DEF(JSMSG_BAD_PROP_ID, 0, JSEXN_SYNTAXERR, "invalid property id") MSG_DEF(JSMSG_BAD_RETURN_OR_YIELD, 1, JSEXN_SYNTAXERR, "{0} not in function") -- Alioth's /home/x2go-admin/maintenancescripts/git/hooks/post-receive-email on /srv/git/code.x2go.org/pale-moon.git _______________________________________________ x2go-commits mailing list [email protected] https://lists.x2go.org/listinfo/x2go-commits
