1  /*
     2   * Copyright the original author or authors.
     3   * 
     4   * Licensed under the MOZILLA PUBLIC LICENSE, Version 1.1 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   * 
     8   *      http://www.mozilla.org/MPL/MPL-1.1.html
     9   * 
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  import org.as2lib.regexp.node.Node; 
    18  import org.as2lib.regexp.node.NotSingle;
    19  import org.as2lib.regexp.node.TreeInfo;
    20  
    21  /**
    22   * {@code Single} is a node class for a single character value.
    23   * 
    24   * @author Igor Sadovskiy
    25   */
    26   
    27  class org.as2lib.regexp.node.Single extends Node {
    28  	
    29      private var ch:Number;
    30      
    31      public function Single(n:Number) {
    32          ch = n;
    33      }
    34      
    35      public function dup(flag:Boolean):Node {
    36          return (flag) ? new NotSingle(ch) : new Single(ch);
    37      }
    38      
    39      public function match(matcher:Object, i:Number, seq:String):Boolean {
    40          return (i < matcher.to
    41              && seq.charCodeAt(i) == ch
    42              && next.match(matcher, i+1, seq));
    43      }
    44      
    45      public function study(info:TreeInfo):Boolean {
    46          info.minLength++;
    47          info.maxLength++;
    48          return next.study(info);
    49      }
    50  }
    51  
    52
as2api