Dart bindings: support struct versioning.

mojo/dart/testing/validation_test_input_parser.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 library validation_input_parser;
 
 import 'dart:typed_data';
 
 class ValidationParseResult {
   final Iterable<_Entry> _entries;
@@ skipping 164 matching lines @@
 }
 
 class _ValidationTestParser {
   static final RegExp newline = new RegExp(r'[\r\n]+');
   static final RegExp whitespace = new RegExp(r'[ \t\n\r]+');
   static final RegExp nakedUintRegExp =
     new RegExp(r'^0$|^[1-9][0-9]*$|^0[xX][0-9a-fA-F]+$');
   static final RegExp unsignedRegExp =
     new RegExp(r'^\[u([1248])\](0$|[1-9][0-9]*$|0[xX][0-9a-fA-F]+$)');
   static final RegExp signedRegExp = new RegExp(
-      r'^\[s([1248])\]([-+]?0$|[-+][1-9][0-9]*$|[-+]0[xX][0-9a-fA-F]+$)');
+      r'^\[s([1248])\]([-+]?0$|[-+]?[1-9][0-9]*$|[-+]?0[xX][0-9a-fA-F]+$)');
   static final RegExp binaryRegExp =
     new RegExp(r'^\[(b)\]([01]{8}$)');
   static final RegExp floatRegExp =
     new RegExp(r'^\[([fd])\]([-+]?[0-9]*\.?[0-9]+([eE][-+]?[0-9]+)?$)');
   static final RegExp distRegExp =
     new RegExp(r'^\[dist([48])\]([0-9a-zA-Z_]+$)');
   static final RegExp anchrRegExp =
     new RegExp(r'^\[(anchr)\]([0-9a-zA-Z_]+$)');
   static final RegExp handlesRegExp =
     new RegExp(r'^\[(handles)\](0$|([1-9][0-9]*$)|(0[xX][0-9a-fA-F]+$))');
@@ skipping 232 matching lines @@
       try {
         var result = parse(input);
         assert(false);
       } on ValidationParseError catch(e) {
         // Pass.
       }
     }
   }
 }