MLKNumber.m

/* -*- mode: objc; coding: utf-8 -*- */
/* Toilet Lisp, a Common Lisp subset for the Étoilé runtime.
 * Copyright (C) 2008  Matthias Andreas Benkard.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 *
 * This program 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#import "MLKInteger.h"
#import "MLKNumber.h"

#import <Foundation/NSException.h>
#import <Foundation/NSString.h>


@implementation MLKNumber
#define DECLARE_ABSTRACT(SIGNATURE, RETURN_VALUE)               \
  SIGNATURE                                                     \
{                                                               \
  [NSException raise:@"MLKInternalInconsistencyError"           \
               format:@"Tried to invoke an abstract method."];  \
  return RETURN_VALUE;                                          \
}

DECLARE_ABSTRACT (-(MLKNumber *) add:(MLKNumber *)arg, nil)
DECLARE_ABSTRACT (-(MLKNumber *) subtract:(MLKNumber *)arg, nil)
DECLARE_ABSTRACT (-(MLKNumber *) multiplyWith:(MLKNumber *)arg, nil)
DECLARE_ABSTRACT (-(MLKNumber *) divideBy:(MLKNumber *)arg, nil)

-(MLKNumber *) numerator
{
  return self;
}

-(MLKNumber *) denominator
{
  return [MLKInteger integerWithInt:1]; 
}

DECLARE_ABSTRACT (-(double) doubleValue, 0.0)
@end