[es6] Re-implement rest parameters via desugaring.

src/ast-expression-visitor.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/ast-expression-visitor.h"
 
 #include "src/ast.h"
 #include "src/codegen.h"
@@ skipping 185 matching lines @@
   RECURSE(Visit(expr->then_expression()));
   RECURSE(Visit(expr->else_expression()));
 }
 
 
 void AstExpressionVisitor::VisitVariableProxy(VariableProxy* expr) {
   VisitExpression(expr);
 }
 
 
+void AstExpressionVisitor::VisitRestParameter(RestParameter* expr) {

[adamk, 2015/08/28 23:26:37]

Why isn't this one UNREACHABLE()?

[caitp (gmail), 2015/08/28 23:58:01]

I wasn't sure if AstExpressionVisitor was ever used before compilation or not.
Sounds like it isn't, so I guess it can probably be UNREACHABLE

[caitp (gmail), 2015/08/29 15:51:59]

All the AST node stuff is now gone, replaced with the use of the mutable
qualifier

+  VisitExpression(expr);
+}
+
+
 void AstExpressionVisitor::VisitLiteral(Literal* expr) {
   VisitExpression(expr);
 }
 
 
 void AstExpressionVisitor::VisitRegExpLiteral(RegExpLiteral* expr) {
   VisitExpression(expr);
 }
 
 
@@ skipping 126 matching lines @@
 
 void AstExpressionVisitor::VisitSuperPropertyReference(
     SuperPropertyReference* expr) {}
 
 
 void AstExpressionVisitor::VisitSuperCallReference(SuperCallReference* expr) {}
 }
 
 
 }  // namespace v8::internal