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