Fasta infrastructure.

pkg/fasta/lib/src/target.dart

Index: pkg/fasta/lib/src/target.dart
diff --git a/pkg/fasta/lib/src/target.dart b/pkg/fasta/lib/src/target.dart
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+// Copyright (c) 2016, 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 fasta.target;
+
+import 'dart:async' show
+    Future;
+
+import 'ticker.dart' show
+    Ticker;
+
+import 'ast_kind.dart' show
+    AstKind;
+
+/// A compilation target.
+///
+/// A target reads source files with [read] and writes out the resulting
+/// program when [writeOutline] is called.
+abstract class Target {
+  final Ticker ticker;
+
+  Target(this.ticker);
+
+  /// Instructs this target to include [uri] in its result.
+  void read(Uri uri);
+
+  /// Write the resulting program in the file [uri].
+  Future writeProgram(Uri uri, AstKind astKind);
+
+  /// Write the resulting outline in the file [uri].
+  Future writeOutline(Uri uri);
+}