Error reporting for spans.

pkg/analyzer/lib/src/generated/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 engine.error;
 
 import 'dart:collection';
 
+import 'package:source_span/source_span.dart';
+
 import 'ast.dart' show AstNode;
 import 'element.dart';
 import 'java_core.dart';
 import 'scanner.dart' show Token;
 import 'source.dart';
 
 /**
  * An error discovered during the analysis of some Dart code.
  *
  * See [AnalysisErrorListener].
@@ skipping 2637 matching lines @@
    * Report an error with the given [errorCode] and [arguments]. The location of
    * the error is specified by the given [offset] and [length].
    */
   void reportErrorForOffset(ErrorCode errorCode, int offset, int length,
       [List<Object> arguments]) {
     _errorListener.onError(
         new AnalysisError(_source, offset, length, errorCode, arguments));
   }
 
   /**
+   * Report an error with the given [errorCode] and [arguments]. The location of
+   * the error is specified by the given [span].
+   */
+  void reportErrorForSpan(ErrorCode errorCode, SourceSpan span,
+      [List<Object> arguments]) {
+    _errorListener.onError(new AnalysisError(
+        _source, span.start.offset, span.length, errorCode, arguments));

[scheglov, 2015/10/21 23:47:21]

I'd use reportErrorForOffset() as other reportErrorForX() do.

[pquitslund, 2015/10/21 23:56:57]

Done.

+  }
+
+  /**
    * Report an error with the given [errorCode] and [arguments]. The [token] is
    * used to compute the location of the error.
    */
   void reportErrorForToken(ErrorCode errorCode, Token token,
       [List<Object> arguments]) {
     reportErrorForOffset(errorCode, token.offset, token.length, arguments);
   }
 
   /**
    * Report an error with the given [errorCode] and [arguments]. The [node] is
@@ skipping 2379 matching lines @@
    * Initialize a newly created error code to have the given [name].
    */
   const TodoCode(String name) : super(name, "{0}");
 
   @override
   ErrorSeverity get errorSeverity => ErrorSeverity.INFO;
 
   @override
   ErrorType get type => ErrorType.TODO;
 }