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
|
#include <unistd.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <assert.h>
#include "misc.h"
#include "lexer.h"
#include "machine.h"
#include "parse.h"
#include "scope.h"
#include "runtime.h"
#include "emit.h"
#define EMIT(fun, arg...) (emit_##fun(emit, ##arg))
void emit_common_declare_global(pass_kind_t pass, scope_t *scope, qstr qstr) {
if (pass == PASS_1) {
if (scope->kind == SCOPE_MODULE) {
printf("SyntaxError?: can't declare global in outer code\n");
return;
}
bool added;
id_info_t *id_info = scope_find_or_add_id(scope, qstr, &added);
if (!added) {
printf("SyntaxError?: identifier already declared something\n");
return;
}
id_info->kind = ID_INFO_KIND_GLOBAL_EXPLICIT;
// if the id exists in the global scope, set its kind to EXPLICIT_GLOBAL
id_info = scope_find_global(scope, qstr);
if (id_info != NULL) {
id_info->kind = ID_INFO_KIND_GLOBAL_EXPLICIT;
}
}
}
void emit_common_declare_nonlocal(pass_kind_t pass, scope_t *scope, qstr qstr) {
if (pass == PASS_1) {
if (scope->kind == SCOPE_MODULE) {
printf("SyntaxError?: can't declare nonlocal in outer code\n");
return;
}
bool added;
id_info_t *id_info = scope_find_or_add_id(scope, qstr, &added);
if (!added) {
printf("SyntaxError?: identifier already declared something\n");
return;
}
id_info_t *id_info2 = scope_find_local_in_parent(scope, qstr);
if (id_info2 == NULL || !(id_info2->kind == ID_INFO_KIND_LOCAL || id_info2->kind == ID_INFO_KIND_CELL || id_info2->kind == ID_INFO_KIND_FREE)) {
printf("SyntaxError: no binding for nonlocal '%s' found\n", qstr_str(qstr));
return;
}
id_info->kind = ID_INFO_KIND_FREE;
scope_close_over_in_parents(scope, qstr);
}
}
void emit_common_load_id(pass_kind_t pass, scope_t *scope, qstr qstr___class__, emitter_t *emit, qstr qstr) {
id_info_t *id_info = NULL;
if (pass == PASS_1) {
// name adding/lookup
bool added;
id_info = scope_find_or_add_id(scope, qstr, &added);
if (added) {
if (strcmp(qstr_str(qstr), "AssertionError") == 0) {
id_info->kind = ID_INFO_KIND_GLOBAL_EXPLICIT;
// TODO how much of a hack is this?
} else if (strcmp(qstr_str(qstr), "super") == 0 && scope->kind == SCOPE_FUNCTION) {
// special case, super is a global, and also counts as use of __class__
id_info->kind = ID_INFO_KIND_GLOBAL_EXPLICIT;
id_info_t *id_info2 = scope_find_local_in_parent(scope, qstr___class__);
if (id_info2 != NULL) {
id_info2 = scope_find_or_add_id(scope, qstr___class__, &added);
if (added) {
id_info2->kind = ID_INFO_KIND_FREE;
scope_close_over_in_parents(scope, qstr___class__);
}
}
} else {
id_info_t *id_info2 = scope_find_local_in_parent(scope, qstr);
if (id_info2 != NULL && (id_info2->kind == ID_INFO_KIND_LOCAL || id_info2->kind == ID_INFO_KIND_CELL || id_info2->kind == ID_INFO_KIND_FREE)) {
id_info->kind = ID_INFO_KIND_FREE;
scope_close_over_in_parents(scope, qstr);
} else {
id_info->kind = ID_INFO_KIND_GLOBAL_IMPLICIT;
}
}
}
} else {
id_info = scope_find(scope, qstr);
}
assert(id_info != NULL); // TODO can this ever fail?
// call the emit backend with the correct code
if (id_info == NULL || id_info->kind == ID_INFO_KIND_GLOBAL_IMPLICIT) {
EMIT(load_name, qstr);
} else if (id_info->kind == ID_INFO_KIND_GLOBAL_EXPLICIT) {
EMIT(load_global, qstr);
} else if (id_info->kind == ID_INFO_KIND_LOCAL) {
EMIT(load_fast, qstr, id_info->local_num);
} else if (id_info->kind == ID_INFO_KIND_CELL || id_info->kind == ID_INFO_KIND_FREE) {
EMIT(load_deref, qstr);
} else {
assert(0);
}
}
static id_info_t *get_id_for_modification(pass_kind_t pass, scope_t *scope, emitter_t *emit, qstr qstr) {
id_info_t *id_info = NULL;
if (pass == PASS_1) {
// name adding/lookup
bool added;
id_info = scope_find_or_add_id(scope, qstr, &added);
if (added) {
if (scope->kind == SCOPE_MODULE || scope->kind == SCOPE_CLASS) {
id_info->kind = ID_INFO_KIND_GLOBAL_IMPLICIT;
} else {
id_info->kind = ID_INFO_KIND_LOCAL;
}
} else if (scope->kind >= SCOPE_FUNCTION && scope->kind <= SCOPE_GEN_EXPR && id_info->kind == ID_INFO_KIND_GLOBAL_IMPLICIT) {
// rebind as a local variable
id_info->kind = ID_INFO_KIND_LOCAL;
}
} else {
id_info = scope_find(scope, qstr);
}
assert(id_info != NULL); // TODO can this ever fail?
return id_info;
}
void emit_common_store_id(pass_kind_t pass, scope_t *scope, emitter_t *emit, qstr qstr) {
// create/get the id info
id_info_t *id = get_id_for_modification(pass, scope, emit, qstr);
// call the emit backend with the correct code
if (id == NULL || id->kind == ID_INFO_KIND_GLOBAL_IMPLICIT) {
EMIT(store_name, qstr);
} else if (id->kind == ID_INFO_KIND_GLOBAL_EXPLICIT) {
EMIT(store_global, qstr);
} else if (id->kind == ID_INFO_KIND_LOCAL) {
EMIT(store_fast, qstr, id->local_num);
} else if (id->kind == ID_INFO_KIND_CELL || id->kind == ID_INFO_KIND_FREE) {
EMIT(store_deref, qstr);
} else {
assert(0);
}
}
void emit_common_delete_id(pass_kind_t pass, scope_t *scope, emitter_t *emit, qstr qstr) {
// create/get the id info
id_info_t *id = get_id_for_modification(pass, scope, emit, qstr);
// call the emit backend with the correct code
if (id == NULL || id->kind == ID_INFO_KIND_GLOBAL_IMPLICIT) {
EMIT(delete_name, qstr);
} else if (id->kind == ID_INFO_KIND_GLOBAL_EXPLICIT) {
EMIT(delete_global, qstr);
} else if (id->kind == ID_INFO_KIND_LOCAL) {
EMIT(delete_fast, qstr, id->local_num);
} else if (id->kind == ID_INFO_KIND_CELL || id->kind == ID_INFO_KIND_FREE) {
EMIT(delete_deref, qstr);
} else {
assert(0);
}
}
|
