ccode/valaccodeexpressionstatement.vala

   1 /* valaccodeexpressionstatement.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 statement that evaluates a given expression.
  27  */
  28 public class Vala.CCodeExpressionStatement : CCodeStatement {
  29         /**
  30          * The expression to evaluate.
  31          */
  32         public CCodeExpression expression { get; set; }
  33
  34         public CCodeExpressionStatement (CCodeExpression expr) {
  35                 expression = expr;
  36         }
  37
  38         public override void write (CCodeWriter writer) {
  39                 if (expression is CCodeCommaExpression) {
  40                         // expand comma expression into multiple statements
  41                         // to improve code readability
  42                         var ccomma = expression as CCodeCommaExpression;
  43
  44                         foreach (CCodeExpression expr in ccomma.get_inner ()) {
  45                                 write_expression (writer, expr);
  46                         }
  47                 } else if (expression is CCodeParenthesizedExpression) {
  48                         var cpar = expression as CCodeParenthesizedExpression;
  49
  50                         write_expression (writer, cpar.inner);
  51                 } else {
  52                         write_expression (writer, expression);
  53                 }
  54         }
  55
  56         private void write_expression (CCodeWriter writer, CCodeExpression? expr) {
  57                 writer.write_indent (line);
  58                 if (expr != null) {
  59                         expr.write (writer);
  60                 }
  61                 writer.write_string (";");
  62                 writer.write_newline ();
  63         }
  64 }