Connect analyzer's AnalysisError object to front_end's CompilationError.

pkg/analyzer/lib/error/error.dart

 // Copyright (c) 2014, 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 analyzer.error.error;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/error/listener.dart';
 import 'package:analyzer/src/dart/scanner/scanner.dart' show ScannerErrorCode;
 import 'package:analyzer/src/error/codes.dart';
 import 'package:analyzer/src/generated/java_core.dart';
 import 'package:analyzer/src/generated/parser.dart' show ParserErrorCode;
 import 'package:analyzer/src/generated/source.dart';
+import 'package:front_end/compilation_error.dart';
 import 'package:front_end/src/base/errors.dart';
 import 'package:front_end/src/scanner/errors.dart';
+import 'package:source_span/src/span.dart';
 
 export 'package:front_end/src/base/errors.dart'
     show ErrorCode, ErrorSeverity, ErrorType;
 
 const List<ErrorCode> errorCodeValues = const [
   //
   // Manually generated. You can mostly reproduce this list by running the
   // following command from the root of the analyzer package:
   //
   // > cat
@@ skipping 607 matching lines @@
     }
   }
   return _uniqueNameToCodeMap[uniqueName];
 }
 
 /**
  * An error discovered during the analysis of some Dart code.
  *
  * See [AnalysisErrorListener].
  */
-class AnalysisError {
+class AnalysisError extends CompilationError {
   /**
    * An empty array of errors used when no errors are expected.
    */
   static const List<AnalysisError> NO_ERRORS = const <AnalysisError>[];
 
   /**
    * A [Comparator] that sorts by the name of the file that the [AnalysisError]
    * was found.
    */
   static Comparator<AnalysisError> FILE_COMPARATOR =
@@ skipping 87 matching lines @@
   String get correction => _correction;
 
   @override
   int get hashCode {
     int hashCode = offset;
     hashCode ^= (_message != null) ? _message.hashCode : 0;
     hashCode ^= (source != null) ? source.hashCode : 0;
     return hashCode;
   }
 
+  @override
+  SourceSpan get span => source.sourceFile.span(offset, offset + length);
+
   /**
    * Return the message to be displayed for this error. The message should
    * indicate what is wrong and why it is wrong.
    */
   String get message => _message;
 
   @override
   bool operator ==(Object other) {
     if (identical(other, this)) {
       return true;
@@ skipping 136 matching lines @@
 
   @override
   int get hashCode => ordinal;
 
   @override
   int compareTo(ErrorProperty other) => ordinal - other.ordinal;
 
   @override
   String toString() => name;
 }