LangExp


1   // Copyright (c) 2004  Per M.A. Bothner.
2   // This is free software;  for terms and warranty disclaimer see ./COPYING.
3   
4   package gnu.expr;
5   import gnu.mapping.*;
6   
7   /** A language-specific expression. */
8   
9   public class LangExp extends Expression
10  {
11    Object   hook;
12  
13    public Object   getLangValue () { return hook; }
14    public void setLangValue (Object   value) { hook = value; }
15  
16    public LangExp () { }
17  
18    public LangExp (Object   value) { this.hook = value; }
19  
20    protected boolean mustCompile () { return false; }
21  
22    public void print (OutPort out)
23    {
24      out.print("(LangExp ???)");
25    }
26  
27    protected Expression walk (ExpWalker walker)
28    {
29      return walker.walkLangExp(this);
30    }
31  
32    public void compile (Compilation comp, Target target)
33    {
34      throw new RuntimeException  ("compile called on LangExp");
35    }
36  }
37

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