summaryrefslogtreecommitdiff
path: root/MLKEnvironment.h
blob: b1f8feb061b6fa82cc4876df085fcc17744cc0b6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
/* -*- mode: objc; coding: utf-8 -*- */
/* Étoilisp/Mulklisp, 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 "MLKLispValue.h"

@class NSMutableDictionary, MLKSymbol;


@interface MLKEnvironment : MLKLispValue
{
  MLKEnvironment *_parent;
  NSMutableDictionary *_bindings;
}

+(void) initialize;

-(MLKEnvironment *) init;
-(MLKEnvironment *) initWithParent:(MLKEnvironment *)parent;
-(MLKEnvironment *) initWithBindings:(NSDictionary *)bindings;
-(MLKEnvironment *) initWithParent:(MLKEnvironment *)parent bindings:(NSDictionary *)bindings;

-(MLKEnvironment *) parent;

-(void) addBinding:(MLKSymbol *)symbol;
-(void) addBindings:(NSDictionary *)bindings;
-(void) addValue:(id)value forBinding:(MLKSymbol *)symbol;
-(void) setValue:(id)value forBinding:(MLKSymbol *)symbol;
-(id) valueForBinding:(MLKSymbol *)symbol;

-(MLKEnvironment *) environmentForBinding:(MLKSymbol *)symbol;

// Private methods.
-(void) setBinding:(MLKSymbol *)symbol to:(id)value inEnvironment:(MLKEnvironment *)env;
-(id) valueForBinding:(MLKSymbol *)symbol inEnvironment:(MLKEnvironment *)env;

-(BOOL) boundp:(MLKSymbol *)symbol;
-(void) makunbound:(MLKSymbol *)symbol;

-(void) dealloc;
@end