01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10: Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11: Suite 350, San Mateo, CA 94403, USA.
12:
13: db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14: WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: for more details.
17:
18: You should have received a copy of the GNU General Public License along
19: with this program; if not, write to the Free Software Foundation, Inc.,
20: 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21: package EDU.purdue.cs.bloat.tree;
22:
23: /**
24: * SCStmt represents a swizzle check on an element in an array.
25: */
26: public class SCStmt extends Stmt {
27:
28: Expr array;
29:
30: Expr index;
31:
32: boolean redundant;
33:
34: /**
35: * Constructor.
36: *
37: * @param a
38: * The array on which to place the swizzle check.
39: * @param i
40: * The element in array a to swizzle.
41: */
42: public SCStmt(final Expr a, final Expr i) {
43: this .array = a;
44: this .index = i;
45: this .redundant = false;
46: array.setParent(this );
47: index.setParent(this );
48: }
49:
50: public Expr array() {
51: return array;
52: }
53:
54: public Expr index() {
55: return index;
56: }
57:
58: /**
59: * @return True, if the swizzle check is redundent.
60: */
61: public boolean redundant() {
62: return redundant;
63: }
64:
65: public void set_redundant(final boolean val) {
66: this .redundant = val;
67: }
68:
69: public void visit(final TreeVisitor visitor) {
70: visitor.visitSCStmt(this );
71: }
72:
73: public Object clone() {
74: return copyInto(new SCStmt((Expr) array.clone(), (Expr) index
75: .clone()));
76: }
77:
78: public void visitForceChildren(final TreeVisitor visitor) {
79: if (visitor.reverse()) {
80: index.visit(visitor);
81: array.visit(visitor);
82: } else {
83: array.visit(visitor);
84: index.visit(visitor);
85: }
86: }
87:
88: }
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