pkg/analysis_server/test/analysis_abstract.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.

int findIdentifierLength(String search) {
  var length = 0;
  while (length < search.length) {
    var c = search.codeUnitAt(length);
    if (!(c >= 'a'.codeUnitAt(0) && c <= 'z'.codeUnitAt(0) ||
        c >= 'A'.codeUnitAt(0) && c <= 'Z'.codeUnitAt(0) ||
        c >= '0'.codeUnitAt(0) && c <= '9'.codeUnitAt(0) ||
        c == '_'.codeUnitAt(0))) {
      break;
    }
    length++;
  }
  return length;
}