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
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/* -*- 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 <Foundation/NSArray.h>
#import <Foundation/NSDictionary.h>
#import <Foundation/NSException.h>
#import <Foundation/NSNull.h>
#import <Foundation/NSSet.h>
#import <Foundation/NSString.h>
#import "MLKCons.h"
#import "MLKDynamicContext.h"
#import "MLKLexicalContext.h"
#import "MLKLexicalEnvironment.h"
#import "MLKEnvironment.h"
#import "MLKLinkedList.h"
#import "MLKPackage.h"
#import "MLKParenReader.h"
#import "MLKReadtable.h"
#import "MLKSymbol.h"
#import "MLKInteger.h"
#import "runtime-compatibility.h"
#define MAKE_ENVIRONMENT(variable, parent, parent_member) \
(variable \
? (id) [[MLKEnvironment alloc] \
initWithParent:(parent \
? (id) parent_member \
: nil) \
bindings:variable] \
: (id) (parent ? (id) RETAIN (parent_member) : nil));
static MLKLexicalContext *global_context;
static MLKPackage *cl;
static MLKPackage *sys;
static MLKSymbol *SPECIAL;
static MLKSymbol *LEXICAL;
@implementation MLKLexicalContext
+(void) initialize
{
MLKDynamicContext *dynamic_context = [MLKDynamicContext globalContext];
MLKLexicalEnvironment *globalenv = [MLKLexicalEnvironment globalEnvironment];
cl = [MLKPackage findPackage:@"COMMON-LISP"];
sys = [MLKPackage findPackage:@"TOILET-SYSTEM"];
global_context = [[self alloc] initWithParent:nil
variables:[globalenv variables]
functions:[globalenv functions]
goTags:nil
macros:nil
symbolMacros:nil
declarations:nil];
SPECIAL = [cl intern:@"SPECIAL"];
LEXICAL = [sys intern:@"LEXICAL"];
}
-(MLKLexicalContext *) initWithParent:(MLKLexicalContext *)aContext
variables:(NSSet *)vars
functions:(NSSet *)functions
goTags:(NSDictionary *)goTags
macros:(NSDictionary *)macros
symbolMacros:(NSDictionary *)symbolMacros
declarations:(id)declarations
{
int i;
NSArray *e;
self = [super init];
ASSIGN (_parent, (aContext ? aContext : [MLKLexicalContext globalContext]));
ASSIGN (_variableLocations, [NSMutableDictionary dictionary]);
e = [vars allObjects];
for (i = 0; i < [e count]; i++)
{
[self addVariable:[e objectAtIndex:i]];
}
ASSIGN (_functionLocations, [NSMutableDictionary dictionary]);
e = [functions allObjects];
for (i = 0; i < [e count]; i++)
{
[self addFunction:[e objectAtIndex:i]];
}
_goTags = MAKE_ENVIRONMENT (goTags, _parent, _parent->_goTags);
_macros = MAKE_ENVIRONMENT (macros, _parent, _parent->_macros);
_symbolMacros = MAKE_ENVIRONMENT (macros, _parent, _parent->_symbolMacros);
ASSIGN (_knownMacros, [macros allKeys]);
ASSIGN (_knownSymbolMacros, [symbolMacros allKeys]);
ASSIGN (_declarations, declarations);
return self;
}
+(MLKLexicalContext *) globalContext
{
return global_context;
}
-(id) macroForSymbol:(MLKSymbol *)symbol
{
return [_macros valueForBinding:symbol];
}
-(void) setMacro:(MLKFuncallable *)value forSymbol:(MLKSymbol *)symbol
{
[_symbolMacros setValue:value forBinding:symbol];
}
-(id) symbolMacroForSymbol:(MLKSymbol *)symbol
{
return [_symbolMacros valueForBinding:symbol];
}
-(void) setSymbolMacro:(MLKFuncallable *)value forSymbol:(MLKSymbol *)symbol
{
[_symbolMacros setValue:value forBinding:symbol];
}
-(id) goTagForSymbol:(MLKSymbol *)symbol
{
return [_goTags valueForBinding:symbol];
}
-(BOOL) symbolNamesFunction:(MLKSymbol *)symbol
{
if ([_functionLocations objectForKey:(symbol ? (id)symbol : (id)[NSNull null])])
return YES;
else if ([_knownMacros containsObject:(symbol ? (id)symbol : (id)[NSNull null])])
return NO;
else
return (_parent && [_parent symbolNamesFunction:symbol]);
}
-(BOOL) symbolNamesMacro:(MLKSymbol *)symbol
{
if ([_functionLocations objectForKey:(symbol ? (id)symbol : (id)[NSNull null])])
return NO;
else if ([_knownMacros containsObject:(symbol ? (id)symbol : (id)[NSNull null])])
return YES;
else
return (_parent && [_parent symbolNamesMacro:symbol]);
}
-(BOOL) symbolNamesSymbolMacro:(MLKSymbol *)symbol
{
if ([_variableLocations objectForKey:(symbol ? (id)symbol : (id)[NSNull null])])
return NO;
else if ([_knownSymbolMacros containsObject:(symbol ? (id)symbol : (id)[NSNull null])])
return YES;
else
return (_parent && [_parent symbolNamesSymbolMacro:symbol]);
}
-(BOOL) variableIsLexical:(MLKSymbol *)symbol
{
id rest;
rest = _declarations;
while (rest)
{
id item = [rest car];
if ([[item cdr] car] == symbol)
{
if ([item car] == LEXICAL)
return YES;
else if ([item car] == SPECIAL)
return NO;
}
rest = [rest cdr];
}
// Has the variable been globally proclaimed special?
rest = [MLKLexicalContext globalContext]->_declarations;
while (rest)
{
id item = [rest car];
if ([[item cdr] car] == symbol)
{
if ([item car] == LEXICAL)
return YES;
else if ([item car] == SPECIAL)
return NO;
}
rest = [rest cdr];
}
return YES;
}
-(void) addVariable:(MLKSymbol *)symbol
{
[_variableLocations setObject:[NSNull null] forKey:symbol];
}
-(void) addFunction:(MLKSymbol *)symbol
{
[_functionLocations setObject:[NSNull null] forKey:symbol];
}
-(void) dealloc
{
RELEASE (_macros);
RELEASE (_knownMacros);
RELEASE (_knownSymbolMacros);
RELEASE (_symbolMacros);
RELEASE (_goTags);
RELEASE (_functionLocations);
RELEASE (_declarations);
RELEASE (_parent);
[super dealloc];
}
@end
|
