Changeset 187108 in webkit for trunk/Source/JavaScriptCore/parser/SyntaxChecker.h

Timestamp:

Jul 21, 2015, 11:18:42 AM (10 years ago)

Author:

[email protected]

Message:

Add support for the new.target syntax.
​https://bugs.webkit.org/show_bug.cgi?id=147051

Patch by Keith Miller <​[email protected]> on 2015-07-21
Reviewed by Yusuke Suzuki.

Add support for new.target. Essentially the implementation is, before constructor calls,
the target of a "new" is placed where "this" noramlly goes in the calling convention.
Then in the constructor before object is initialized we move the target of the "new"
into a local variable.

• bytecompiler/BytecodeGenerator.cpp:

(JSC::BytecodeGenerator::BytecodeGenerator):

• bytecompiler/NodesCodegen.cpp:

(JSC::NewTargetNode::emitBytecode):

• parser/ASTBuilder.h:

(JSC::ASTBuilder::newTargetExpr):

• parser/NodeConstructors.h:

(JSC::NewTargetNode::NewTargetNode):

• parser/Nodes.h:
• parser/Parser.cpp:

(JSC::Parser<LexerType>::parseMemberExpression):

• parser/SyntaxChecker.h:

(JSC::SyntaxChecker::newTargetExpr):

• runtime/CommonIdentifiers.h:
• tests/stress/new-target.js: Added.

(test):
(call):
(Constructor.subCall):
(Constructor.SubConstructor):
(Constructor):
(noAssign):
(doWeirdThings):
(SuperClass):
(SubClass):

File:

• trunk/Source/JavaScriptCore/parser/SyntaxChecker.h (modified) (2 diffs)

trunk/Source/JavaScriptCore/parser/SyntaxChecker.h

@@ -75 +75 @@
         FunctionExpr, ClassExpr, SuperExpr, BracketExpr, DotExpr, CallExpr,
         NewExpr, PreExpr, PostExpr, UnaryExpr, BinaryExpr,
-        ConditionalExpr, AssignmentExpr, TypeofExpr,
+        ConditionalExpr, AssignmentExpr, TypeofExpr, NewTargetExpr,
         DeleteExpr, ArrayLiteralExpr, BindingDestructuring,
         ArrayDestructuring, ObjectDestructuring, SourceElementsResult,
@@ -155 +155 @@
     ExpressionType thisExpr(const JSTokenLocation&, ThisTDZMode) { return ThisExpr; }
     ExpressionType superExpr(const JSTokenLocation&) { return SuperExpr; }
+    ExpressionType newTargetExpr(const JSTokenLocation&) { return NewTargetExpr; }
     ExpressionType createResolve(const JSTokenLocation&, const Identifier*, int) { return ResolveExpr; }
     ExpressionType createObjectLiteral(const JSTokenLocation&) { return ObjectLiteralExpr; }