Linter Demo

Errors: 0

Warnings: 4

File: /home/fstrocco/Dart/dart/benchmark/compiler/lib/src/io/source_information.dart

// Copyright (c) 2015, 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 dart2js.source_information; import '../dart2jslib.dart' show SourceSpan; import '../elements/elements.dart' show AstElement; import '../scanner/scannerlib.dart' show Token; import '../tree/tree.dart' show Node; import '../js/js.dart' show JavaScriptNodeSourceInformation; import 'code_output.dart'; import 'source_file.dart'; /// Interface for passing source information, for instance for use in source /// maps, through the backend. abstract class SourceInformation extends JavaScriptNodeSourceInformation { SourceSpan get sourceSpan; void beginMapping(CodeOutput output); void endMapping(CodeOutput output); } /// Source information that contains start source position and optionally an /// end source position. class StartEndSourceInformation implements SourceInformation { final SourceLocation startPosition; final SourceLocation endPosition; StartEndSourceInformation(this.startPosition, [this.endPosition]); SourceSpan get sourceSpan { Uri uri = startPosition.sourceUri; int begin = startPosition.offset; int end = endPosition == null ? begin : endPosition.offset; return new SourceSpan(uri, begin, end); } void beginMapping(CodeBuffer output) { output.beginMappedRange(); output.setSourceLocation(startPosition); } void endMapping(CodeBuffer output) { if (endPosition != null) { output.setSourceLocation(endPosition); } output.endMappedRange(); } int get hashCode { return (startPosition.hashCode * 17 + endPosition.hashCode * 19) & 0x7FFFFFFF; } bool operator ==(other) { if (identical(this, other)) return true; if (other is! StartEndSourceInformation) return false; return startPosition == other.startPosition && endPosition == other.endPosition; } // TODO(johnniwinther): Remove this method. Source information should be // computed based on the element by provided from statements and expressions. static StartEndSourceInformation computeSourceInformation( AstElement element) { AstElement implementation = element.implementation; SourceFile sourceFile = implementation.compilationUnit.script.file; String name = element.name; Node node = implementation.node; Token beginToken; Token endToken; if (node == null) { // Synthesized node. Use the enclosing element for the location. beginToken = endToken = element.position; } else { beginToken = node.getBeginToken(); endToken = node.getEndToken(); } // TODO(podivilov): find the right sourceFile here and remove offset // checks below. SourceLocation sourcePosition, endSourcePosition; if (beginToken.charOffset < sourceFile.length) { sourcePosition = new TokenSourceLocation(sourceFile, beginToken, name); } if (endToken.charOffset < sourceFile.length) { endSourcePosition = new TokenSourceLocation(sourceFile, endToken, name); } return new StartEndSourceInformation(sourcePosition, endSourcePosition); } String toString() { StringBuffer sb = new StringBuffer(); sb.write('${startPosition.sourceUri}:'); // Use 1-based line/column info to match usual dart tool output. sb.write('[${startPosition.line + 1},${startPosition.column + 1}]'); if (endPosition != null) { sb.write('-[${endPosition.line + 1},${endPosition.column + 1}]'); } return sb.toString(); } } /// [SourceInformation] that consists of an offset position into the source /// code. class PositionSourceInformation implements SourceInformation { final SourceLocation sourcePosition; PositionSourceInformation(this.sourcePosition); @override void beginMapping(CodeOutput output) { output.setSourceLocation(sourcePosition); } @override void endMapping(CodeOutput output) { // Do nothing. } SourceSpan get sourceSpan { Uri uri = sourcePosition.sourceUri; int offset = sourcePosition.offset; return new SourceSpan(uri, offset, offset); } int get hashCode { return sourcePosition.hashCode * 17 & 0x7FFFFFFF; } bool operator ==(other) { if (identical(this, other)) return true; if (other is! PositionSourceInformation) return false; return sourcePosition == other.sourcePosition; } String toString() { StringBuffer sb = new StringBuffer(); sb.write('${sourcePosition.sourceUri}:'); // Use 1-based line/column info to match usual dart tool output. sb.write('[${sourcePosition.line + 1},${sourcePosition.column + 1}]'); return sb.toString(); } } /// A location in a source file. abstract class SourceLocation { final SourceFile _sourceFile; int _line; SourceLocation(this._sourceFile) { assert(isValid); } /// The absolute URI of the source file of this source location. Uri get sourceUri => _sourceFile.uri; /// The character offset of the this source location into the source file. int get offset; /// The 0-based line number of the [offset]. int get line { if (_line == null) _line = _sourceFile.getLine(offset); return _line; } /// The 0-base column number of the [offset] with its line. int get column => _sourceFile.getColumn(line, offset); /// The name associated with this source location, if any. String get sourceName; /// `true` if the offset within the length of the source file. bool get isValid => offset < _sourceFile.length; int get hashCode { return sourceUri.hashCode * 17 + offset.hashCode * 17 + sourceName.hashCode * 23; } bool operator ==(other) { if (identical(this, other)) return true; if (other is! SourceLocation) return false; return sourceUri == other.sourceUri && offset == other.offset && sourceName == other.sourceName; } String toString() { // Use 1-based line/column info to match usual dart tool output. return '${sourceUri}:[${line + 1},${column + 1}]'; } } class TokenSourceLocation extends SourceLocation { final Token token; final String sourceName; TokenSourceLocation(SourceFile sourceFile, this.token, this.sourceName) : super(sourceFile); @override int get offset => token.charOffset; String toString() { return '${super.toString()}:$sourceName'; } }