Support metadata on patches.

pkg/compiler/lib/src/tree/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 tree;
 
 abstract class Visitor<R> {
   const Visitor();
 
   R visitNode(Node node);
@@ skipping 1879 matching lines @@
   }
 
   Token getBeginToken() => labels.getBeginToken();
 
   Token getEndToken() => statement.getEndToken();
 
   bool isValidContinueTarget() => statement.isValidContinueTarget();
 }
 
 abstract class LibraryTag extends Node {
-  final Link<MetadataAnnotation> metadata;
+  final List<MetadataAnnotation> metadata;
 
   LibraryTag(this.metadata);
 
   bool get isLibraryName => false;
   bool get isImport => false;
   bool get isExport => false;
   bool get isPart => false;
   bool get isPartOf => false;
 }
 
 class LibraryName extends LibraryTag {
   final Expression name;
 
   final Token libraryKeyword;
 
   LibraryName(this.libraryKeyword,
               this.name,
-              Link<MetadataAnnotation> metadata)
+              List<MetadataAnnotation> metadata)
     : super(metadata);
 
   bool get isLibraryName => true;
 
   LibraryName asLibraryName() => this;
 
   accept(Visitor visitor) => visitor.visitLibraryName(this);
 
   visitChildren(Visitor visitor) => name.accept(visitor);
 
   Token getBeginToken() => libraryKeyword;
 
   Token getEndToken() => name.getEndToken().next;
 }
 
 /**
  * This tag describes a dependency between one library and the exported
  * identifiers of another library. The other library is specified by the [uri].
  * Combinators filter away some identifiers from the other library.
  */
 abstract class LibraryDependency extends LibraryTag {
   final StringNode uri;
   final NodeList combinators;
 
   LibraryDependency(this.uri,
                     this.combinators,
-                    Link<MetadataAnnotation> metadata)
+                    List<MetadataAnnotation> metadata)
     : super(metadata);
 
   LibraryDependency asLibraryDependency() => this;
 }
 
 /**
  * An [:import:] library tag.
  *
  * An import tag is dependency on another library where the exported identifiers
  * are put into the import scope of the importing library. The import scope is
  * only visible inside the library.
  */
 class Import extends LibraryDependency {
   final Identifier prefix;
   final Token importKeyword;
   final bool isDeferred;
 
   Import(this.importKeyword, StringNode uri,
          this.prefix, NodeList combinators,
-         Link<MetadataAnnotation> metadata,
+         List<MetadataAnnotation> metadata,
          {this.isDeferred})
       : super(uri, combinators, metadata);
 
   bool get isImport => true;
 
   Import asImport() => this;
 
   accept(Visitor visitor) => visitor.visitImport(this);
 
   visitChildren(Visitor visitor) {
@@ skipping 44 matching lines @@
  * An export tag is dependency on another library where the exported identifiers
  * are put into the export scope of the exporting library. The export scope is
  * not visible inside the library.
  */
 class Export extends LibraryDependency {
   final Token exportKeyword;
 
   Export(this.exportKeyword,
          StringNode uri,
          NodeList combinators,
-         Link<MetadataAnnotation> metadata)
+         List<MetadataAnnotation> metadata)
       : super(uri, combinators, metadata);
 
   bool get isExport => true;
 
   Export asExport() => this;
 
   accept(Visitor visitor) => visitor.visitExport(this);
 
   visitChildren(Visitor visitor) {
     uri.accept(visitor);
     if (combinators != null) combinators.accept(visitor);
   }
 
   Token getBeginToken() => exportKeyword;
 
   Token getEndToken() {
     if (combinators != null) return combinators.getEndToken().next;
     return uri.getEndToken().next;
   }
 }
 
 class Part extends LibraryTag {
   final StringNode uri;
 
   final Token partKeyword;
 
-  Part(this.partKeyword, this.uri, Link<MetadataAnnotation> metadata)
+  Part(this.partKeyword, this.uri, List<MetadataAnnotation> metadata)
     : super(metadata);
 
   bool get isPart => true;
 
   Part asPart() => this;
 
   accept(Visitor visitor) => visitor.visitPart(this);
 
   visitChildren(Visitor visitor) => uri.accept(visitor);
 
   Token getBeginToken() => partKeyword;
 
   Token getEndToken() => uri.getEndToken().next;
 }
 
 class PartOf extends Node {
   final Expression name;
 
   final Token partKeyword;
 
-  final Link<MetadataAnnotation> metadata;
+  final List<MetadataAnnotation> metadata;
 
   PartOf(this.partKeyword, this.name, this.metadata);
 
   Token get ofKeyword => partKeyword.next;
 
   bool get isPartOf => true;
 
   PartOf asPartOf() => this;
 
   accept(Visitor visitor) => visitor.visitPartOf(this);
@@ skipping 258 matching lines @@
 
   // VariableDefinitions.
   get metadata => null;
   get type => null;
 
   // Typedef.
   get typeParameters => null;
   get formals => null;
   get typedefKeyword => null;
 }