1 /* 2 * Copyright (C) 2006 uguu@users.sourceforge.jp, All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * 3. Neither the name of Clarkware Consulting, Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without prior written permission. For written 18 * permission, please contact clarkware@clarkware.com. 19 * 20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, 21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 22 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 23 * CLARKWARE CONSULTING OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 26 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 29 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 package jp.sourceforge.rpn_computer; 33 34 import jp.sourceforge.tokenizer.Tokenizer; 35 36 /** 37 * <p> 38 * 抽象構文木のノードを表します。 39 * </p> 40 * 41 * @author uguu@users.sourceforge.jp 42 */ 43 public interface RpnNode { 44 45 /** 46 * <p> 47 * {@link Tokenizer}クラスからトークンを読み込み、ノードを構築してください。 48 * </p> 49 * 50 * @param tokenizer 51 * トークンを読み込む字句解析器。 52 */ 53 void parse(Tokenizer tokenizer); 54 55 /** 56 * <p> 57 * ノードから命令列を生成して、コンテキストに追加してください。 58 * </p> 59 * 60 * @param context 61 * コンテキスト。 62 */ 63 void compile(RpnCompileContext context); 64 65 /** 66 * <p> 67 * 子ノードの配列を返してください。このノードがリーフである場合、要素が0の配列を返してください。nullを返した場合、他の処理で例外がスローされる可能性があります(例えば、構文木をトラバースするとき)。 68 * </p> 69 * 70 * @return 子ノードの配列。 71 */ 72 RpnNode[] getChildren(); 73 }