1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/* valadeletestatement.vala
*
* Copyright (C) 2008-2011 Jürg Billeter
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Author:
* Jürg Billeter <j@bitron.ch>
*/
/**
* Represents a delete statement.
*
* {{{ delete foo; }}}
*/
public class Vala.DeleteStatement : CodeNode, Statement {
/**
* Expression representing the instance to be freed.
*/
public Expression expression {
get { return _expression; }
private set {
_expression = value;
_expression.parent_node = this;
}
}
private Expression _expression;
public DeleteStatement (Expression expression, SourceReference? source_reference = null) {
this.expression = expression;
this.source_reference = source_reference;
}
public override void accept (CodeVisitor visitor) {
visitor.visit_delete_statement (this);
}
public override void accept_children (CodeVisitor visitor) {
expression.accept (visitor);
}
public override void replace_expression (Expression old_node, Expression new_node) {
if (expression == old_node) {
expression = new_node;
}
}
public override bool check (CodeContext context) {
if (checked) {
return !error;
}
checked = true;
if (!expression.check (context)) {
// if there was an error in the inner expression, skip this check
error = true;
return false;
}
if (!(expression.value_type is PointerType) && !(expression.value_type is ArrayType)) {
error = true;
Report.error (source_reference, "delete operator not supported for `%s'", expression.value_type.to_string ());
}
return !error;
}
public override void emit (CodeGenerator codegen) {
expression.emit (codegen);
codegen.visit_delete_statement (this);
}
}
|
