ccode/valaccodeblock.vala

   1 /* valaccodeblock.vala
   2  *
   3  * Copyright (C) 2006-2008  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 using Gee;
  25
  26 /**
  27  * Represents a C code block.
  28  */
  29 public class Vala.CCodeBlock : CCodeStatement {
  30         /**
  31          * Specifies whether a newline at the end of the block should be
  32          * suppressed.
  33          */
  34         public bool suppress_newline { get; set; }
  35
  36         private Gee.List<CCodeNode> statements = new ArrayList<CCodeNode> ();
  37
  38         /**
  39          * Prepend the specified statement to the list of statements.
  40          */
  41         public void prepend_statement (CCodeNode statement) {
  42                 statements.insert (0, statement);
  43         }
  44
  45         /**
  46          * Append the specified statement to the list of statements.
  47          */
  48         public void add_statement (CCodeNode statement) {
  49                 /* allow generic nodes to include comments */
  50                 statements.add (statement);
  51         }
  52
  53         public override void write (CCodeWriter writer) {
  54                 // the last reachable statement
  55                 CCodeNode last_statement = null;
  56
  57                 writer.write_begin_block ();
  58                 foreach (CCodeNode statement in statements) {
  59                         statement.write_declaration (writer);
  60
  61                         // determine last reachable statement
  62                         if (statement is CCodeLabel || statement is CCodeCaseStatement) {
  63                                 last_statement = null;
  64                         } else if (statement is CCodeReturnStatement || statement is CCodeGotoStatement
  65                         || statement is CCodeContinueStatement || statement is CCodeBreakStatement) {
  66                                 last_statement = statement;
  67                         }
  68                 }
  69
  70                 foreach (CCodeNode statement in statements) {
  71                         statement.write (writer);
  72
  73                         // only output reachable code
  74                         if (statement == last_statement) {
  75                                 break;
  76                         }
  77                 }
  78
  79                 writer.write_end_block ();
  80
  81                 if (!suppress_newline) {
  82                         writer.write_newline ();
  83                 }
  84         }
  85 }