Revert "Remove Compiler.assembledCode."

pkg/compiler/lib/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.
 
 library compiler;
 
 import 'dart:async';
 import 'src/apiimpl.dart';
 
 // Unless explicitly allowed, passing [:null:] for any argument to the
@@ skipping 47 matching lines @@
  * [:null:]. If [uri] is not [:null:], neither are [begin] and
  * [end]. [uri] indicates the compilation unit from where the
  * diagnostic originates. [begin] and [end] are zero-based character
  * offsets from the beginning of the compilaton unit. [message] is the
  * diagnostic message, and [kind] indicates indicates what kind of
  * diagnostic it is.
  */
 typedef void DiagnosticHandler(Uri uri, int begin, int end,
                                String message, Diagnostic kind);
 
-/// Information resulting from the compilation.
-class CompilationResult {
-  /// `true` if the compilation succeeded, that is, compilation didn't fail due
-  /// to compile-time errors and/or internal errors.
-  final bool isSuccess;
-
-  /// The compiler object used for the compilation.
-  ///
-  /// Note: The type of [compiler] is implementation dependent and may vary.
-  /// Use only for debugging and testing.
-  final compiler;
-
-  CompilationResult(this.compiler, {this.isSuccess: true});
-}
-
 /**
  * Returns a future that completes to a non-null String when [script]
  * has been successfully compiled.
  *
  * The compiler output is obtained by providing an [outputProvider].
  *
  * If the compilation fails, the future's value will be [:null:] and
  * [handler] will have been invoked at least once with [:kind ==
  * Diagnostic.ERROR:] or [:kind == Diagnostic.CRASH:].
  *
  * Deprecated: if no [outputProvider] is given, the future completes
  * to the compiled script. This behavior will be removed in the future
  * as the compiler may create multiple files to support lazy loading
  * of libraries.
  */
-Future<CompilationResult> compile(
-    Uri script,
-    Uri libraryRoot,
-    Uri packageRoot,
-    CompilerInputProvider inputProvider,
-    DiagnosticHandler handler,
-    [List<String> options = const [],
-     CompilerOutputProvider outputProvider,
-     Map<String, dynamic> environment = const {}]) {
+Future<String> compile(Uri script,
+                       Uri libraryRoot,
+                       Uri packageRoot,
+                       CompilerInputProvider inputProvider,
+                       DiagnosticHandler handler,
+                       [List<String> options = const [],
+                        CompilerOutputProvider outputProvider,
+                        Map<String, dynamic> environment = const {}]) {
   if (!libraryRoot.path.endsWith("/")) {
     throw new ArgumentError("libraryRoot must end with a /");
   }
   if (packageRoot != null && !packageRoot.path.endsWith("/")) {
     throw new ArgumentError("packageRoot must end with a /");
   }
   // TODO(ahe): Consider completing the future with an exception if
   // code is null.
   Compiler compiler = new Compiler(inputProvider,
                                    outputProvider,
                                    handler,
                                    libraryRoot,
                                    packageRoot,
                                    options,
                                    environment);
-  return compiler.run(script).then((bool success) {
-    return new CompilationResult(compiler, isSuccess: success);
+  // TODO(ahe): Use the value of the future (which signals success or failure).
+  return compiler.run(script).then((_) {
+    String code = compiler.assembledCode;
+    if (code != null && outputProvider != null) {
+      code = ''; // Non-null signals success.
+    }
+    return code;
   });
 }
 
 /**
  * Kind of diagnostics that the compiler can report.
  */
 class Diagnostic {
   /**
    * An error as identified by the "Dart Programming Language
    * Specification" [http://www.dartlang.org/docs/spec/].
@@ skipping 55 matching lines @@
   final String name;
 
   /**
    * This constructor is not private to support user-defined
    * diagnostic kinds.
    */
   const Diagnostic(this.ordinal, this.name);
 
   String toString() => name;
 }