ccode/valaccodebinaryexpression.vala

   1 /* valaccodebinaryexpression.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 an expression with two operands in C code.
  27  */
  28 public class Vala.CCodeBinaryExpression : CCodeExpression {
  29         /**
  30          * The binary operator.
  31          */
  32         public CCodeBinaryOperator operator { get; set; }
  33
  34         /**
  35          * The left operand.
  36          */
  37         public CCodeExpression left { get; set; }
  38
  39         /**
  40          * The right operand.
  41          */
  42         public CCodeExpression right { get; set; }
  43
  44         public CCodeBinaryExpression (CCodeBinaryOperator op, CCodeExpression l, CCodeExpression r) {
  45                 operator = op;
  46                 left = l;
  47                 right = r;
  48         }
  49
  50         public override void write (CCodeWriter writer) {
  51                 left.write_inner (writer);
  52
  53                 switch (operator) {
  54                 case CCodeBinaryOperator.PLUS: writer.write_string (" + "); break;
  55                 case CCodeBinaryOperator.MINUS: writer.write_string (" - "); break;
  56                 case CCodeBinaryOperator.MUL: writer.write_string (" * "); break;
  57                 case CCodeBinaryOperator.DIV: writer.write_string (" / "); break;
  58                 case CCodeBinaryOperator.MOD: writer.write_string (" % "); break;
  59                 case CCodeBinaryOperator.SHIFT_LEFT: writer.write_string (" << "); break;
  60                 case CCodeBinaryOperator.SHIFT_RIGHT: writer.write_string (" >> "); break;
  61                 case CCodeBinaryOperator.LESS_THAN: writer.write_string (" < "); break;
  62                 case CCodeBinaryOperator.GREATER_THAN: writer.write_string (" > "); break;
  63                 case CCodeBinaryOperator.LESS_THAN_OR_EQUAL: writer.write_string (" <= "); break;
  64                 case CCodeBinaryOperator.GREATER_THAN_OR_EQUAL: writer.write_string (" >= "); break;
  65                 case CCodeBinaryOperator.EQUALITY: writer.write_string (" == "); break;
  66                 case CCodeBinaryOperator.INEQUALITY: writer.write_string (" != "); break;
  67                 case CCodeBinaryOperator.BITWISE_AND: writer.write_string (" & "); break;
  68                 case CCodeBinaryOperator.BITWISE_OR: writer.write_string (" | "); break;
  69                 case CCodeBinaryOperator.BITWISE_XOR: writer.write_string (" ^ "); break;
  70                 case CCodeBinaryOperator.AND: writer.write_string (" && "); break;
  71                 case CCodeBinaryOperator.OR: writer.write_string (" || "); break;
  72                 default: assert_not_reached ();
  73                 }
  74
  75                 right.write_inner (writer);
  76         }
  77
  78         public override void write_inner (CCodeWriter writer) {
  79                 writer.write_string ("(");
  80                 this.write (writer);
  81                 writer.write_string (")");
  82         }
  83 }
  84
  85 public enum Vala.CCodeBinaryOperator {
  86         PLUS,
  87         MINUS,
  88         MUL,
  89         DIV,
  90         MOD,
  91         SHIFT_LEFT,
  92         SHIFT_RIGHT,
  93         LESS_THAN,
  94         GREATER_THAN,
  95         LESS_THAN_OR_EQUAL,
  96         GREATER_THAN_OR_EQUAL,
  97         EQUALITY,
  98         INEQUALITY,
  99         BITWISE_AND,
 100         BITWISE_OR,
 101         BITWISE_XOR,
 102         AND,
 103         OR
 104 }