1 ////////////////////////////////////////////////////////////////////////////////
2 // MillScript: an Open Spice interpreter and batch website creation tool
3 // Copyright (C) 2001-2004 Open World Ltd
4 // Copyright (C) 2005 Kevin Rogers
5 //
6 // This file is part of MillScript.
7 //
8 // MillScript is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU General Public License as published by the Free
10 // Software Foundation; either version 2 of the License, or (at your option)
11 // any later version.
12 //
13 // MillScript is distributed in the hope that it will be useful, but WITHOUT
14 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 // more details.
17 //
18 // You should have received a copy of the GNU General Public License along with
19 // MillScript; if not, write to the Free Software Foundation, Inc., 59 Temple
20 // Place, Suite 330, Boston, MA 02111-1307 USA
21 ////////////////////////////////////////////////////////////////////////////////
22 package org.millscript.millscript.expr;
23
24 import org.millscript.millscript.action.Action;
25 import org.millscript.millscript.alert.Alerts;
26 import org.millscript.millscript.vm.CompilerState;
27
28 /**
29 * This class represents fake expressions. A fake expression is one that doesn't
30 * compile to it's own action, e.g. those expressions that compile to a function
31 * call, like index expressions.
32 */
33 public abstract class FakeExpr extends Expr< Action > {
34
35 /**
36 * @see org.millscript.millscript.expr.Expr#compileIt()
37 */
38 @Override
39 public final Action compileIt() {
40 // A fake expression cannot be compiled...
41 throw( Alerts.fault( "This cannot be compiled" ).mishap() );
42 }
43
44 /**
45 * @see org.millscript.millscript.expr.Expr#resolve(org.millscript.millscript.vm.CompilerState)
46 */
47 @Override
48 public void resolve( final CompilerState state ) {
49 // A fake expression cannot be renamed...
50 throw( Alerts.fault( "This cannot be renamed" ).mishap() );
51 }
52
53 }