girparser: Do not add Object prerequisite before symbol resolution
[vala-lang.git] / vala / valayieldstatement.vala
blob8b2069f21833f68efcfff81f05c83bd95136669d
1 /* valayieldstatement.vala
3 * Copyright (C) 2008-2010 Jürg Billeter
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 * Author:
20 * Jürg Billeter <j@bitron.ch>
23 /**
24 * Represents a yield statement in the source code.
26 public class Vala.YieldStatement : CodeNode, Statement {
27 /**
28 * The expression to yield or the method call to yield to.
30 public Expression? yield_expression {
31 get { return _yield_expression; }
32 set {
33 _yield_expression = value;
34 if (_yield_expression != null) {
35 _yield_expression.parent_node = this;
40 private Expression _yield_expression;
42 /**
43 * Creates a new yield statement.
45 * @param yield_expression the yield expression
46 * @param source_reference reference to source code
47 * @return newly created yield statement
49 public YieldStatement (Expression? yield_expression, SourceReference? source_reference = null) {
50 this.yield_expression = yield_expression;
51 this.source_reference = source_reference;
54 public override void accept (CodeVisitor visitor) {
55 visitor.visit_yield_statement (this);
58 public override void accept_children (CodeVisitor visitor) {
59 if (yield_expression != null) {
60 yield_expression.accept (visitor);
62 visitor.visit_end_full_expression (yield_expression);
66 public override void replace_expression (Expression old_node, Expression new_node) {
67 if (yield_expression == old_node) {
68 yield_expression = new_node;
72 public override bool check (CodeContext context) {
73 if (yield_expression != null) {
74 yield_expression.check (context);
75 error = yield_expression.error;
78 context.analyzer.current_method.yield_count++;
80 return !error;
83 public override void emit (CodeGenerator codegen) {
84 if (yield_expression != null) {
85 yield_expression.emit (codegen);
87 codegen.visit_end_full_expression (yield_expression);
90 codegen.visit_yield_statement (this);