blois@google.com
2c034bfe3f
Recent changes started using the Analyzer's parseCompilationUnit method which throws exceptions on syntax errors, but this is undesirable in many cases. Adding an option to disable this behavior and using that in code_transformers. BUG= R=scheglov@google.com, sigmund@google.com Review URL: https://codereview.chromium.org//204033003 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@34070 260f80e4-7a28-3924-810f-c04153c831b5
92 lines
2.9 KiB
Dart
92 lines
2.9 KiB
Dart
// Copyright (c) 2013, 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 analyzer;
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import 'dart:io';
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import 'package:path/path.dart' as pathos;
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import 'src/error.dart';
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import 'src/generated/ast.dart';
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import 'src/generated/error.dart';
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import 'src/generated/parser.dart';
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import 'src/generated/scanner.dart';
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import 'src/generated/source_io.dart';
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import 'src/string_source.dart';
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export 'src/error.dart';
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export 'src/generated/ast.dart';
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export 'src/generated/error.dart';
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export 'src/generated/utilities_dart.dart';
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/// Parses a Dart file into an AST.
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CompilationUnit parseDartFile(String path) {
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String contents = new File(path).readAsStringSync();
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var errorCollector = new _ErrorCollector();
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var sourceFactory = new SourceFactory([new FileUriResolver()]);
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var absolutePath = pathos.absolute(path);
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var source = sourceFactory.forUri(pathos.toUri(absolutePath).toString());
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if (source == null) {
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throw new ArgumentError("Can't get source for path $path");
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}
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if (!source.exists()) {
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throw new ArgumentError("Source $source doesn't exist");
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}
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var reader = new CharSequenceReader(contents);
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var scanner = new Scanner(source, reader, errorCollector);
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var token = scanner.tokenize();
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var parser = new Parser(source, errorCollector);
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var unit = parser.parseCompilationUnit(token);
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unit.lineInfo = new LineInfo(scanner.lineStarts);
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if (errorCollector.hasErrors) throw errorCollector.group;
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return unit;
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}
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/// Parses a string of Dart code into an AST.
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///
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/// If [name] is passed, it's used in error messages as the name of the code
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/// being parsed.
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CompilationUnit parseCompilationUnit(String contents,
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{String name, bool suppressErrors: false}) {
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if (name == null) name = '<unknown source>';
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var source = new StringSource(contents, name);
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var errorCollector = new _ErrorCollector();
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var reader = new CharSequenceReader(contents);
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var scanner = new Scanner(source, reader, errorCollector);
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var token = scanner.tokenize();
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var parser = new Parser(source, errorCollector);
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var unit = parser.parseCompilationUnit(token);
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unit.lineInfo = new LineInfo(scanner.lineStarts);
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if (errorCollector.hasErrors && !suppressErrors) throw errorCollector.group;
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return unit;
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}
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/// Converts an AST node representing a string literal into a [String].
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String stringLiteralToString(StringLiteral literal) {
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return literal.stringValue;
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}
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/// A simple error listener that collects errors into an [AnalysisErrorGroup].
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class _ErrorCollector extends AnalysisErrorListener {
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final _errors = <AnalysisError>[];
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/// Whether any errors where collected.
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bool get hasErrors => !_errors.isEmpty;
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/// The group of errors collected.
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AnalyzerErrorGroup get group =>
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new AnalyzerErrorGroup.fromAnalysisErrors(_errors);
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_ErrorCollector();
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void onError(AnalysisError error) => _errors.add(error);
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}
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