Johnni Winther
fe702abc55
- introduces ElementEnvironment and uses it to implement most of CommonElements and BackendHelpers R=sigmund@google.com Review-Url: https://codereview.chromium.org/2675103003 .
48 lines
1.5 KiB
Dart
48 lines
1.5 KiB
Dart
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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library dart2js.parser.task;
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import '../common.dart';
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import '../common/tasks.dart' show CompilerTask;
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import '../compiler.dart' show Compiler;
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import '../elements/modelx.dart' show ElementX;
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import 'package:front_end/src/fasta/scanner.dart' show Token;
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import '../tree/tree.dart' show Node;
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import 'element_listener.dart' show ScannerOptions;
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import 'package:front_end/src/fasta/parser.dart' show Parser, ParserError;
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import 'node_listener.dart' show NodeListener;
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class ParserTask extends CompilerTask {
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final Compiler compiler;
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ParserTask(Compiler compiler)
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: compiler = compiler,
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super(compiler.measurer);
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String get name => 'Parser';
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Node parse(ElementX element) {
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return measure(() => element.parseNode(compiler.parsingContext));
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}
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Node parseCompilationUnit(Token token) {
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return measure(() {
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NodeListener listener =
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new NodeListener(const ScannerOptions(), compiler.reporter, null);
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Parser parser = new Parser(listener);
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try {
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parser.parseUnit(token);
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} on ParserError catch (_) {
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assert(invariant(compiler.reporter.spanFromToken(token),
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compiler.compilationFailed));
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return listener.makeNodeList(0, null, null, '\n');
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}
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Node result = listener.popNode();
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assert(listener.nodes.isEmpty);
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return result;
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});
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}
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}
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