Konstantin Shcheglov
9f986d2501
Change-Id: Iffe4370431587e46a141ddc72a86ceec29c163b2 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/176486 Commit-Queue: Konstantin Shcheglov <scheglov@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com> Reviewed-by: Samuel Rawlins <srawlins@google.com>
93 lines
3.5 KiB
Dart
93 lines
3.5 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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import 'dart:collection';
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import 'package:analyzer/error/error.dart';
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/// A wrapper around [AnalysisError] that provides a more user-friendly string
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/// representation.
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class AnalyzerError implements Exception {
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final AnalysisError error;
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AnalyzerError(this.error);
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String get message => toString();
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@override
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String toString() {
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var builder = StringBuffer();
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// Print a less friendly string representation to ensure that
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// error.source.contents is not executed, as .contents it isn't async
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String sourceName = error.source.shortName;
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// sourceName ??= '<unknown source>';
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builder.write("Error in $sourceName: ${error.message}");
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// var content = error.source.contents.data;
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// var beforeError = content.substring(0, error.offset);
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// var lineNumber = "\n".allMatches(beforeError).length + 1;
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// builder.writeln("Error on line $lineNumber of ${error.source.fullName}: "
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// "${error.message}");
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// var errorLineIndex = beforeError.lastIndexOf("\n") + 1;
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// var errorEndOfLineIndex = content.indexOf("\n", error.offset);
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// if (errorEndOfLineIndex == -1) errorEndOfLineIndex = content.length;
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// var errorLine = content.substring(
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// errorLineIndex, errorEndOfLineIndex);
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// var errorColumn = error.offset - errorLineIndex;
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// var errorLength = error.length;
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//
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// // Ensure that the error line we display isn't too long.
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// if (errorLine.length > _MAX_ERROR_LINE_LENGTH) {
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// var leftLength = errorColumn;
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// var rightLength = errorLine.length - leftLength;
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// if (leftLength > _MAX_ERROR_LINE_LENGTH ~/ 2 &&
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// rightLength > _MAX_ERROR_LINE_LENGTH ~/ 2) {
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// errorLine = "..." + errorLine.substring(
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// errorColumn - _MAX_ERROR_LINE_LENGTH ~/ 2 + 3,
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// errorColumn + _MAX_ERROR_LINE_LENGTH ~/ 2 - 3)
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// + "...";
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// errorColumn = _MAX_ERROR_LINE_LENGTH ~/ 2;
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// } else if (rightLength > _MAX_ERROR_LINE_LENGTH ~/ 2) {
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// errorLine = errorLine.substring(0, _MAX_ERROR_LINE_LENGTH - 3) + "...";
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// } else {
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// assert(leftLength > _MAX_ERROR_LINE_LENGTH ~/ 2);
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// errorColumn -= errorLine.length - _MAX_ERROR_LINE_LENGTH;
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// errorLine = "..." + errorLine.substring(
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// errorLine.length - _MAX_ERROR_LINE_LENGTH + 3, errorLine.length);
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// }
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// errorLength = math.min(errorLength, _MAX_ERROR_LINE_LENGTH - errorColumn);
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// }
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// builder.writeln(errorLine);
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//
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// for (var i = 0; i < errorColumn; i++) builder.write(" ");
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// for (var i = 0; i < errorLength; i++) builder.write("^");
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builder.writeln();
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return builder.toString();
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}
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}
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/// An error class that collects multiple [AnalyzerError]s that are emitted
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/// during a single analysis.
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class AnalyzerErrorGroup implements Exception {
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final List<AnalyzerError> _errors;
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AnalyzerErrorGroup(Iterable<AnalyzerError> errors)
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: _errors = errors.toList();
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/// Creates an [AnalyzerErrorGroup] from a list of lower-level
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/// [AnalysisError]s.
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AnalyzerErrorGroup.fromAnalysisErrors(Iterable<AnalysisError> errors)
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: this(errors.map((e) => AnalyzerError(e)));
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/// The errors in this collection.
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List<AnalyzerError> get errors =>
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UnmodifiableListView<AnalyzerError>(_errors);
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String get message => toString();
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@override
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String toString() => errors.join("\n");
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}
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