Changeset 223232 in webkit for trunk/Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp

Timestamp:

Oct 11, 2017, 11:45:23 PM (8 years ago)

Author:

Yusuke Suzuki

Message:

import.meta should not be assignable
​https://bugs.webkit.org/show_bug.cgi?id=178202

Reviewed by Saam Barati.

JSTests:

• modules/import-meta-assignment.js: Added.

(shouldThrow):
(SyntaxError.import.meta.can.shouldThrow):

Source/JavaScriptCore:

import.meta cannot be used for LHS. This patch adds MetaPropertyNode
and make NewTargetNode and ImportMetaNode as derived classes of MetaPropertyNode.
We change the parser not to allow assignments for MetaPropertyNode.

• bytecompiler/NodesCodegen.cpp:

(JSC::ImportMetaNode::emitBytecode):

• parser/ASTBuilder.h:

(JSC::ASTBuilder::createImportMetaExpr):
(JSC::ASTBuilder::isMetaProperty):
(JSC::ASTBuilder::isImportMeta):

• parser/NodeConstructors.h:

(JSC::MetaPropertyNode::MetaPropertyNode):
(JSC::NewTargetNode::NewTargetNode):
(JSC::ImportMetaNode::ImportMetaNode):

• parser/Nodes.h:

(JSC::ExpressionNode::isMetaProperty const):
(JSC::ExpressionNode::isImportMeta const):

• parser/Parser.cpp:

(JSC::Parser<LexerType>::metaPropertyName):
(JSC::Parser<LexerType>::parseAssignmentExpression):
(JSC::Parser<LexerType>::parseMemberExpression):
(JSC::Parser<LexerType>::parseUnaryExpression):

• parser/Parser.h:
• parser/SyntaxChecker.h:

(JSC::SyntaxChecker::createImportMetaExpr):
(JSC::SyntaxChecker::isMetaProperty):
(JSC::SyntaxChecker::isImportMeta):

File:

• trunk/Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp (modified) (1 diff)

trunk/Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp

@@ -210 +210 @@
 
     return generator.moveToDestinationIfNeeded(dst, generator.newTarget());
+}
+
+// ------------------------------ ImportMetaNode ---------------------------------
+
+RegisterID* ImportMetaNode::emitBytecode(BytecodeGenerator& generator, RegisterID* dst)
+{
+    return generator.emitNode(dst, m_expr);
 }