codegen/valadovacontrolflowmodule.vala

   1 /* valadovacontrolflowmodule.vala
   2  *
   3  * Copyright (C) 2006-2010  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 public abstract class Vala.DovaControlFlowModule : DovaMethodModule {
  24         public override void visit_if_statement (IfStatement stmt) {
  25                 ccode.open_if (get_cvalue (stmt.condition));
  26
  27                 stmt.true_statement.emit (this);
  28
  29                 if (stmt.false_statement != null) {
  30                         ccode.add_else ();
  31                         stmt.false_statement.emit (this);
  32                 }
  33
  34                 ccode.close ();
  35         }
  36
  37         public override void visit_switch_statement (SwitchStatement stmt) {
  38                 ccode.open_switch (get_cvalue (stmt.expression));
  39
  40                 foreach (SwitchSection section in stmt.get_sections ()) {
  41                         if (section.has_default_label ()) {
  42                                 ccode.add_default ();
  43                         }
  44                         section.emit (this);
  45                 }
  46
  47                 ccode.close ();
  48         }
  49
  50         public override void visit_switch_label (SwitchLabel label) {
  51                 if (label.expression != null) {
  52                         label.expression.emit (this);
  53
  54                         visit_end_full_expression (label.expression);
  55
  56                         ccode.add_case (get_cvalue (label.expression));
  57                 }
  58         }
  59
  60         public override void visit_loop (Loop stmt) {
  61                 ccode.open_while (new CCodeConstant ("true"));
  62
  63                 stmt.body.emit (this);
  64
  65                 ccode.close ();
  66         }
  67
  68         public override void visit_break_statement (BreakStatement stmt) {
  69                 append_local_free (current_symbol, true);
  70
  71                 ccode.add_break ();
  72         }
  73
  74         public override void visit_continue_statement (ContinueStatement stmt) {
  75                 append_local_free (current_symbol, true);
  76
  77                 ccode.add_continue ();
  78         }
  79 }
  80