vala/valaloop.vala

   1 /* valaloop.vala
   2  *
   3  * Copyright (C) 2009-2010  Jürg Billeter
   4  *
   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.
   9
  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.
  14
  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
  18  *
  19  * Author:
  20  *      Jürg Billeter <j@bitron.ch>
  21  */
  22
  23 using GLib;
  24
  25 /**
  26  * Represents an endless loop.
  27  */
  28 public class Vala.Loop : CodeNode, Statement {
  29         /**
  30          * Specifies the loop body.
  31          */
  32         public Block body {
  33                 get {
  34                         return _body;
  35                 }
  36                 set {
  37                         _body = value;
  38                         _body.parent_node = this;
  39                 }
  40         }
  41
  42         private Block _body;
  43
  44         /**
  45          * Creates a new loop.
  46          *
  47          * @param body   loop body
  48          * @param source reference to source code
  49          * @return       newly created while statement
  50          */
  51         public Loop (Block body, SourceReference? source_reference = null) {
  52                 this.body = body;
  53                 this.source_reference = source_reference;
  54         }
  55
  56         public override void accept (CodeVisitor visitor) {
  57                 visitor.visit_loop (this);
  58         }
  59
  60         public override void accept_children (CodeVisitor visitor) {
  61                 body.accept (visitor);
  62         }
  63
  64         public override bool check (CodeContext context) {
  65                 if (checked) {
  66                         return !error;
  67                 }
  68
  69                 checked = true;
  70
  71                 body.check (context);
  72
  73                 add_error_types (body.get_error_types ());
  74
  75                 return !error;
  76         }
  77
  78         public override void emit (CodeGenerator codegen) {
  79                 codegen.visit_loop (this);
  80         }
  81 }
  82