Generate native class metadata as a JavaScript AST.

sdk/lib/_internal/compiler/implementation/js/nodes.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of js;
 
 abstract class NodeVisitor<T> {
   T visitProgram(Program node);
 
   T visitBlock(Block node);
@@ skipping 751 matching lines @@
 }
 
 class ArrayInitializer extends Expression {
   final int length;
   // We represent the array as sparse list of elements. Each element knows its
   // position in the array.
   final List<ArrayElement> elements;
 
   ArrayInitializer(this.length, this.elements);
 
+  factory ArrayInitializer.from(List<Expression> expressions) =>
+      new ArrayInitializer(expressions.length, _convert(expressions));
+
   accept(NodeVisitor visitor) => visitor.visitArrayInitializer(this);
 
   void visitChildren(NodeVisitor visitor) {
     for (ArrayElement element in elements) element.accept(visitor);
   }
 
   int get precedenceLevel => PRIMARY;
+
+  static List<ArrayElement> _convert(List<Expression> expressions) {

[ngeoffray, 2012/11/22 08:49:47]

List<ArrayElement> is kind of not true.

+    int index = 0;
+    return expressions.map(
+        (expression) => new ArrayElement(index++, expression));
+  }
 }
 
 /**
  * An expression inside an [ArrayInitialization]. An [ArrayElement] knows
  * its position in the containing [ArrayInitialization].
  */
 class ArrayElement extends Node {
   int index;
   Expression value;
 
@@ skipping 43 matching lines @@
   /** Contains the pattern and the flags.*/
   String pattern;
 
   RegExpLiteral(this.pattern);
 
   accept(NodeVisitor visitor) => visitor.visitRegExpLiteral(this);
   void visitChildren(NodeVisitor visitor) {}
 
   int get precedenceLevel => PRIMARY;
 }