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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.node;
33  
34  import jp.sourceforge.rpn_computer.ParseException;
35  import jp.sourceforge.rpn_computer.RpnCompileContext;
36  import jp.sourceforge.rpn_computer.RpnNode;
37  import jp.sourceforge.rpn_computer.token.AnyCharacterNotSkipTokenInfo;
38  import jp.sourceforge.rpn_computer.token.SkipTokenInfo;
39  import jp.sourceforge.tokenizer.EofToken;
40  import jp.sourceforge.tokenizer.Token;
41  import jp.sourceforge.tokenizer.TokenInfo;
42  import jp.sourceforge.tokenizer.Tokenizer;
43  
44  /**
45   * <p>
46   * ExpressionStatementを表すノードです。
47   * </p>
48   * 
49   * @author uguu@users.sourceforge.jp
50   */
51  public final class ExpressionStatementNode extends AbstractNode {
52  
53      /**
54       * {@inheritDoc}
55       */
56      public void parse(Tokenizer tokenizer) {
57          RpnNode node = new AdditiveExpressionNode();
58          node.parse(tokenizer);
59          this.addNode(node);
60  
61          TokenInfo[] readTokenInfos = new TokenInfo[] { new AnyCharacterNotSkipTokenInfo(), };
62          TokenInfo[] skipTokenInfos = new TokenInfo[] { new SkipTokenInfo() };
63          tokenizer.read(readTokenInfos, skipTokenInfos);
64          Token token = tokenizer.current();
65          if (!(token instanceof EofToken)) {
66              throw new ParseException(token, new TokenInfo[0]);
67          }
68      }
69  
70      /**
71       * {@inheritDoc}
72       */
73      public String toString() {
74          return "expression statement\n" + this.toChildrenString();
75      }
76  
77      /**
78       * {@inheritDoc}
79       */
80      public void compile(RpnCompileContext context) {
81          this.getChildren()[0].compile(context);
82      }
83  }