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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/* valathrowstatement.vala
*
* Copyright (C) 2007-2010 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 throw statement in the source code.
*/
public class Vala.ThrowStatement : CodeNode, Statement {
/**
* The error expression to throw.
*/
public Expression error_expression {
get {
return _error_expression;
}
private set {
_error_expression = value;
if (_error_expression != null) {
_error_expression.parent_node = this;
}
}
}
private Expression _error_expression;
/**
* Creates a new throw statement.
*
* @param error_expression the error expression
* @param source_reference reference to source code
* @return newly created throw statement
*/
public ThrowStatement (Expression error_expression, SourceReference? source_reference = null) {
this.source_reference = source_reference;
this.error_expression = error_expression;
}
public override void accept (CodeVisitor visitor) {
visitor.visit_throw_statement (this);
}
public override void accept_children (CodeVisitor visitor) {
if (error_expression != null) {
error_expression.accept (visitor);
visitor.visit_end_full_expression (error_expression);
}
}
public override void replace_expression (Expression old_node, Expression new_node) {
if (error_expression == old_node) {
error_expression = new_node;
}
}
public override void get_error_types (Collection<DataType> collection, SourceReference? source_reference = null) {
if (error) {
return;
}
if (source_reference == null) {
source_reference = this.source_reference;
}
var error_type = error_expression.value_type.copy ();
error_type.source_reference = source_reference;
collection.add (error_type);
}
public override bool check (CodeContext context) {
if (checked) {
return !error;
}
checked = true;
if (context.profile == Profile.POSIX) {
Report.error (source_reference, "`throws' is not supported in POSIX profile");
error = true;
return false;
}
error_expression.target_type = new ErrorType (null, null, source_reference);
error_expression.target_type.value_owned = true;
if (error_expression != null) {
if (!error_expression.check (context)) {
error = true;
return false;
}
if (error_expression.value_type == null) {
Report.error (error_expression.source_reference, "invalid error expression");
error = true;
return false;
}
if (context.profile == Profile.GOBJECT && !(error_expression.value_type is ErrorType)) {
Report.error (error_expression.source_reference, "`%s' is not an error type", error_expression.value_type.to_string ());
error = true;
return false;
}
}
return !error;
}
public override void emit (CodeGenerator codegen) {
if (error_expression != null) {
error_expression.emit (codegen);
codegen.visit_end_full_expression (error_expression);
}
codegen.visit_throw_statement (this);
}
public override void get_defined_variables (Collection<Variable> collection) {
error_expression.get_defined_variables (collection);
}
public override void get_used_variables (Collection<Variable> collection) {
error_expression.get_used_variables (collection);
}
}
|
