Generated source mapping through CPS.

tests/compiler/dart2js/sourcemaps/sourcemap_helper.dart

 // Copyright (c) 2015, 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.
 
 library sourcemap.helper;
 
 import 'dart:async';
 import 'package:compiler/src/apiimpl.dart' as api;
 import 'package:compiler/src/dart2jslib.dart' show NullSink;
-import "package:compiler/src/elements/elements.dart";
+import 'package:compiler/src/elements/elements.dart';
+import 'package:compiler/src/helpers/helpers.dart';
 import 'package:compiler/src/filenames.dart';
 import 'package:compiler/src/io/source_file.dart';
 import 'package:compiler/src/io/source_information.dart';
 import 'package:compiler/src/js/js.dart' as js;
 import 'package:compiler/src/js/js_debug.dart';
 import 'package:compiler/src/js/js_source_mapping.dart';
 import 'package:compiler/src/js_backend/js_backend.dart';
 import 'package:compiler/src/source_file_provider.dart';
 import '../memory_compiler.dart';
 import '../output_collector.dart';
@@ skipping 78 matching lines @@
 
   /// Creates a processor for the Dart file [filename].
   SourceMapProcessor(String filename, {this.outputToFile: false}) {
     inputUri = Uri.base.resolve(nativeToUriPath(filename));
     jsPath = 'out.js';
     targetUri = Uri.base.resolve(jsPath);
     sourceMapFileUri = Uri.base.resolve('${jsPath}.map');
   }
 
   /// Computes the [SourceMapInfo] for the compiled elements.
-  Future<List<SourceMapInfo>> process(List<String> options) async {
+  Future<List<SourceMapInfo>> process(
+      List<String> options,
+      {bool verbose: true}) async {
     OutputProvider outputProvider = outputToFile
         ? new OutputProvider()
         : new CloningOutputProvider(targetUri, sourceMapFileUri);
     if (options.contains('--use-new-source-info')) {
-      print('Using the new source information system.');
+      if (verbose) print('Using the new source information system.');
       useNewSourceInfo = true;
     }
     api.Compiler compiler = await compilerFor({},
         outputProvider: outputProvider,
+        // TODO(johnniwinther): Use [verbose] to avoid showing diagnostics.
         options: ['--out=$targetUri', '--source-map=$sourceMapFileUri']
             ..addAll(options));
     if (options.contains('--disable-inlining')) {
-      print('Inlining disabled');
+      if (verbose) print('Inlining disabled');
       compiler.disableInlining = true;
     }
 
     JavaScriptBackend backend = compiler.backend;
     var handler = compiler.handler;
     SourceFileProvider sourceFileProvider = handler.provider;
     sourceFileManager = new ProviderSourceFileManager(sourceFileProvider);
     await compiler.runCompiler(inputUri);
 
     List<SourceMapInfo> infoList = <SourceMapInfo>[];
@@ skipping 189 matching lines @@
       this.jsCode,
       this.sourceLocation,
       this.dartCode,
       {this.isMissing: false});
 
   String toString() {
     return 'CodePoint[kind=$kind,js=$jsCode,dart=$dartCode,'
                      'location=$sourceLocation]';
   }
 }