File: valaccodebinaryexpression.vala

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/* valaccodebinaryexpression.vala
 *
 * Copyright (C) 2006-2008  Jürg Billeter
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.

 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.

 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
 *
 * Author:
 * 	Jürg Billeter <j@bitron.ch>
 */

using GLib;

/**
 * Represents an expression with two operands in C code.
 */
public class Vala.CCodeBinaryExpression : CCodeExpression {
	/**
	 * The binary operator.
	 */
	public CCodeBinaryOperator operator { get; set; }

	/**
	 * The left operand.
	 */
	public CCodeExpression left { get; set; }

	/**
	 * The right operand.
	 */
	public CCodeExpression right { get; set; }

	public CCodeBinaryExpression (CCodeBinaryOperator op, CCodeExpression l, CCodeExpression r) {
		operator = op;
		left = l;
		right = r;
	}

	public override void write (CCodeWriter writer) {
		left.write_inner (writer);

		switch (operator) {
		case CCodeBinaryOperator.PLUS: writer.write_string (" + "); break;
		case CCodeBinaryOperator.MINUS: writer.write_string (" - "); break;
		case CCodeBinaryOperator.MUL: writer.write_string (" * "); break;
		case CCodeBinaryOperator.DIV: writer.write_string (" / "); break;
		case CCodeBinaryOperator.MOD: writer.write_string (" % "); break;
		case CCodeBinaryOperator.SHIFT_LEFT: writer.write_string (" << "); break;
		case CCodeBinaryOperator.SHIFT_RIGHT: writer.write_string (" >> "); break;
		case CCodeBinaryOperator.LESS_THAN: writer.write_string (" < "); break;
		case CCodeBinaryOperator.GREATER_THAN: writer.write_string (" > "); break;
		case CCodeBinaryOperator.LESS_THAN_OR_EQUAL: writer.write_string (" <= "); break;
		case CCodeBinaryOperator.GREATER_THAN_OR_EQUAL: writer.write_string (" >= "); break;
		case CCodeBinaryOperator.EQUALITY: writer.write_string (" == "); break;
		case CCodeBinaryOperator.INEQUALITY: writer.write_string (" != "); break;
		case CCodeBinaryOperator.BITWISE_AND: writer.write_string (" & "); break;
		case CCodeBinaryOperator.BITWISE_OR: writer.write_string (" | "); break;
		case CCodeBinaryOperator.BITWISE_XOR: writer.write_string (" ^ "); break;
		case CCodeBinaryOperator.AND: writer.write_string (" && "); break;
		case CCodeBinaryOperator.OR: writer.write_string (" || "); break;
		default: assert_not_reached ();
		}

		right.write_inner (writer);
	}

	public override void write_inner (CCodeWriter writer) {
		writer.write_string ("(");
		this.write (writer);
		writer.write_string (")");
	}
}

public enum Vala.CCodeBinaryOperator {
	PLUS,
	MINUS,
	MUL,
	DIV,
	MOD,
	SHIFT_LEFT,
	SHIFT_RIGHT,
	LESS_THAN,
	GREATER_THAN,
	LESS_THAN_OR_EQUAL,
	GREATER_THAN_OR_EQUAL,
	EQUALITY,
	INEQUALITY,
	BITWISE_AND,
	BITWISE_OR,
	BITWISE_XOR,
	AND,
	OR
}