Add option --generate-code-with-compile-time-errors.

dart/pkg/compiler/lib/src/compiler.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 dart2js;
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
@@ skipping 726 matching lines @@
   /// `true` if enum declarations are supported.
   final bool enableEnums;
 
   /// If `true`, some values are cached for reuse in incremental compilation.
   /// Incremental compilation is basically calling [run] more than once.
   final bool hasIncrementalSupport;
 
   /// If `true` native extension syntax is supported by the frontend.
   final bool allowNativeExtensions;
 
-  api.CompilerOutputProvider outputProvider;
+  /// Output provider from user of Compiler API.
+  api.CompilerOutputProvider userOutputProvider;
+
+  /// Generate output even when there are compile-time errors.
+  final bool generateCodeWithCompileTimeErrors;
 
   bool disableInlining = false;
 
   List<Uri> librariesToAnalyzeWhenRun;
 
   Tracer tracer;
 
   CompilerTask measuredTask;
   Element _currentElement;
   LibraryElement coreLibrary;
@@ skipping 233 matching lines @@
             this.deferredMapUri: null,
             this.dumpInfo: false,
             this.showPackageWarnings: false,
             this.useContentSecurityPolicy: false,
             this.suppressWarnings: false,
             bool hasIncrementalSupport: false,
             this.enableExperimentalMirrors: false,
             this.enableAsyncAwait: false,
             this.enableEnums: false,
             this.allowNativeExtensions: false,
+            this.generateCodeWithCompileTimeErrors: false,
             api.CompilerOutputProvider outputProvider,
             List<String> strips: const []})
       : this.disableTypeInferenceFlag =
           disableTypeInferenceFlag || !emitJavaScript,
         this.analyzeOnly =
             analyzeOnly || analyzeSignaturesOnly || analyzeAllFlag,
         this.analyzeSignaturesOnly = analyzeSignaturesOnly,
         this.analyzeAllFlag = analyzeAllFlag,
         this.hasIncrementalSupport = hasIncrementalSupport,
         cacheStrategy = new CacheStrategy(hasIncrementalSupport),
-        this.outputProvider = (outputProvider == null)
+        this.userOutputProvider = (outputProvider == null)
             ? NullSink.outputProvider
             : outputProvider {
     if (hasIncrementalSupport) {
       // TODO(ahe): This is too much. Any method from platform and package
       // libraries can be inlined.
       disableInlining = true;
     }
     world = new World(this);
     // TODO(johnniwinther): Initialize core types in [initializeCoreClasses] and
     // make its field final.
@@ skipping 1061 matching lines @@
         // TODO(ahe): It would be nice to reuse names of nested closures.
         closureToClassMapper.forgetElement(closure);
       }
     }
     backend.forgetElement(element);
   }
 
   bool elementHasCompileTimeError(Element element) {
     return elementsWithCompileTimeErrors.contains(element);
   }
+
+  EventSink<String> outputProvider(String name, String extension) {
+    if (compilationFailed) return new NullSink('$name.$extension');
+    return userOutputProvider(name, extension);
+  }
 }
 
 class CompilerTask {
   final Compiler compiler;
   final Stopwatch watch;
   UserTag profilerTag;
 
   CompilerTask(Compiler compiler)
       : this.compiler = compiler,
         watch = (compiler.verbose) ? new Stopwatch() : null;
@@ skipping 271 matching lines @@
   InterfaceType get nullType => nullClass.computeType(compiler);
 
   @override
   InterfaceType get numType => numClass.computeType(compiler);
 
   @override
   InterfaceType get stringType =>  stringClass.computeType(compiler);
 }
 
 typedef void InternalErrorFunction(Spannable location, String message);