JS templates

sdk/lib/_internal/compiler/implementation/js_emitter/metadata_emitter.dart

 // Copyright (c) 2013, 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 dart2js.js_emitter;
 
 class MetadataEmitter extends CodeEmitterHelper {
   /// A list of JS expressions that represent metadata, parameter names and
   /// type, and return types.
   final List<String> globalMetadata = [];
@@ skipping 19 matching lines @@
           Constant value =
               backend.constants.getConstantForMetadata(annotation);
           if (value == null) {
             compiler.internalError(annotation, 'Annotation value is null.');
           } else {
             metadata.add(task.constantReference(value));
           }
         }
       }
       if (metadata.isEmpty) return null;
-      return js.fun(
-          [], [js.return_(new jsAst.ArrayInitializer.from(metadata))]);
+      return js('function() { return # }',
+          new jsAst.ArrayInitializer.from(metadata));
     });
   }
 
   List<int> reifyDefaultArguments(FunctionElement function) {
     FunctionSignature signature = function.functionSignature;
     if (signature.optionalParameterCount == 0) return const [];
     List<int> defaultValues = <int>[];
     for (Element element in signature.optionalParameters) {
       Constant value = backend.constants.getConstantForVariable(element);
       String stringRepresentation = (value == null)
@@ skipping 11 matching lines @@
       compiler.internalError(annotation, 'Annotation value is null.');
       return -1;
     }
     return addGlobalMetadata(
         jsAst.prettyPrint(task.constantReference(value), compiler).getText());
   }
 
   int reifyType(DartType type) {
     jsAst.Expression representation =
         backend.rti.getTypeRepresentation(type, (variable) {
-          return js.toExpression(
+          return js.number(
               task.typeVariableHandler.reifyTypeVariable(variable.element));
         });
 
     return addGlobalMetadata(
         jsAst.prettyPrint(representation, compiler).getText());
   }
 
   int reifyName(String name) {
     return addGlobalMetadata('"$name"');
   }
 
   int addGlobalMetadata(String string) {
     return globalMetadataMap.putIfAbsent(string, () {
       globalMetadata.add(string);
       return globalMetadata.length - 1;
     });
   }
 
   void emitMetadata(CodeBuffer buffer) {
     var literals = backend.typedefTypeLiterals.toList();
     Elements.sortedByPosition(literals);
     var properties = [];
     for (TypedefElement literal in literals) {
       var key = namer.getNameX(literal);
-      var value = js.toExpression(reifyType(literal.rawType));
+      var value = js.number(reifyType(literal.rawType));
       properties.add(new jsAst.Property(js.string(key), value));
     }
     var map = new jsAst.ObjectInitializer(properties);
     buffer.write(
         jsAst.prettyPrint(
-            js('init.functionAliases = #', map).toStatement(), compiler));
+            js.statement('init.functionAliases = #', map), compiler));
     buffer.write('${N}init.metadata$_=$_[');
     for (var metadata in globalMetadata) {
       if (metadata is String) {
         if (metadata != 'null') {
           buffer.write(metadata);
         }
       } else {
         throw 'Unexpected value in metadata: ${Error.safeToString(metadata)}';
       }
       buffer.write(',$n');
     }
     buffer.write('];$n');
   }
 
   List<int> computeMetadata(FunctionElement element) {
     return compiler.withCurrentElement(element, () {
       if (!backend.retainMetadataOf(element)) return const <int>[];
       List<int> metadata = <int>[];
       Link link = element.metadata;
       // TODO(ahe): Why is metadata sometimes null?
       if (link != null) {
         for (; !link.isEmpty; link = link.tail) {
           metadata.add(reifyMetadata(link.head));
         }
       }
       return metadata;
     });
   }
 }