1 ////////////////////////////////////////////////////////////////////////////////
2 // MillScript: an Open Spice interpreter and batch website creation tool
3 // Copyright (C) 2001-2004 Open World Ltd
4 //
5 // This file is part of MillScript.
6 //
7 // MillScript is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU General Public License as published by the Free
9 // Software Foundation; either version 2 of the License, or (at your option)
10 // any later version.
11 //
12 // MillScript is distributed in the hope that it will be useful, but WITHOUT
13 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 // more details.
16 //
17 // You should have received a copy of the GNU General Public License along with
18 // MillScript; if not, write to the Free Software Foundation, Inc., 59 Temple
19 // Place, Suite 330, Boston, MA 02111-1307 USA
20 ////////////////////////////////////////////////////////////////////////////////
21 package org.millscript.millscript.expr;
22
23 /**
24 * This class implements an index expression. An index expression doesn't
25 * have its own actions, rather it wraps to the index function.
26 *
27 * @see org.millscript.millscript.syntax.IndexSyntax
28 * @see org.millscript.millscript.functions.IndexFunction
29 */
30 public final class IndexExpr extends FakeExpr implements OneResult /* defensive */ {
31
32 /**
33 * Returns an expression applying the index function to the specified left
34 * and right hand side expressions.
35 *
36 * @param lhs the expression returning the object to index
37 * @param rhs an expression returning the object to index with
38 * @return an {@link ApplyExpr} applying the
39 * {@link org.millscript.millscript.functions.IndexFunction} to
40 * the specified left and right hand side expressions
41 */
42 public static ApplyExpr make( final Expr lhs, final Expr rhs ) {
43 return (
44 new ApplyExpr(
45 new NameExpr( "indexSequence" ),
46 CommaExpr.make( lhs, rhs )
47 )
48 );
49 }
50
51 }