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: import EDU.purdue.cs.bloat.cfg.*;
24: import EDU.purdue.cs.bloat.editor.*;
25:
26: /**
27: * RetStmt represents the <i>ret</i> opcode which returns from a subroutine.
28: * Recall that when a subroutine returns, the <i>ret</i> opcode's argument
29: * specifies a local variable that stores the return address of
30: */
31: public class RetStmt extends JumpStmt {
32: // ret
33:
34: Subroutine sub; // Subroutine from which to return.
35:
36: /**
37: * Constructor.
38: *
39: * @param sub
40: * The subroutine in which the return statement resides. That is,
41: * from where the program control is returning.
42: *
43: * @see Tree#addInstruction(Instruction, Subroutine)
44: */
45: public RetStmt(final Subroutine sub) {
46: this .sub = sub;
47: }
48:
49: public void visitForceChildren(final TreeVisitor visitor) {
50: }
51:
52: public void visit(final TreeVisitor visitor) {
53: visitor.visitRetStmt(this );
54: }
55:
56: public Subroutine sub() {
57: return sub;
58: }
59:
60: public Object clone() {
61: return copyInto(new RetStmt(sub));
62: }
63: }
|