13 #include "../include/oberon.h"
15 #include "oberon-internals.h"
16 #include "oberon-type-compat.h"
17 #include "oberon-common.h"
18 #include "generator.h"
20 // =======================================================================
22 // =======================================================================
25 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
);
27 static oberon_type_t
*
28 oberon_new_type_ptr(int class)
30 oberon_type_t
* x
= GC_MALLOC(sizeof *x
);
31 memset(x
, 0, sizeof *x
);
36 static oberon_type_t
*
37 oberon_new_type_integer(int size
)
40 x
= oberon_new_type_ptr(OBERON_TYPE_INTEGER
);
45 static oberon_type_t
*
46 oberon_new_type_boolean()
49 x
= oberon_new_type_ptr(OBERON_TYPE_BOOLEAN
);
53 static oberon_type_t
*
54 oberon_new_type_real(int size
)
57 x
= oberon_new_type_ptr(OBERON_TYPE_REAL
);
62 static oberon_type_t
*
63 oberon_new_type_char(int size
)
66 x
= oberon_new_type_ptr(OBERON_TYPE_CHAR
);
71 static oberon_type_t
*
72 oberon_new_type_string(int size
)
75 x
= oberon_new_type_ptr(OBERON_TYPE_STRING
);
80 static oberon_type_t
*
81 oberon_new_type_set(int size
)
84 x
= oberon_new_type_ptr(OBERON_TYPE_SET
);
89 static oberon_expr_t
*
90 oberon_new_operator(int op
, oberon_type_t
* result
, oberon_expr_t
* left
, oberon_expr_t
* right
)
92 oberon_oper_t
* operator;
93 operator = GC_MALLOC(sizeof *operator);
94 memset(operator, 0, sizeof *operator);
96 operator -> is_item
= 0;
97 operator -> result
= result
;
98 operator -> read_only
= 1;
100 operator -> left
= left
;
101 operator -> right
= right
;
103 return (oberon_expr_t
*) operator;
106 static oberon_expr_t
*
107 oberon_new_item(int mode
, oberon_type_t
* result
, int read_only
)
109 oberon_item_t
* item
;
110 item
= GC_MALLOC(sizeof *item
);
111 memset(item
, 0, sizeof *item
);
114 item
-> result
= result
;
115 item
-> read_only
= read_only
;
118 return (oberon_expr_t
*)item
;
121 static oberon_type_t
*
122 oberon_get_type_of_int_value(oberon_context_t
* ctx
, int64_t i
)
124 if(i
>= -128 && i
<= 127)
126 return ctx
-> byte_type
;
128 else if(i
>= -32768 && i
<= 32767)
130 return ctx
-> shortint_type
;
132 else if(i
>= -2147483648 && i
<= 2147483647)
134 return ctx
-> int_type
;
138 return ctx
-> longint_type
;
142 static oberon_expr_t
*
143 oberon_make_integer(oberon_context_t
* ctx
, int64_t i
)
145 oberon_expr_t
* expr
;
146 oberon_type_t
* result
;
147 result
= oberon_get_type_of_int_value(ctx
, i
);
148 expr
= oberon_new_item(MODE_INTEGER
, result
, true);
149 expr
-> item
.integer
= i
;
150 expr
-> item
.real
= i
;
154 static oberon_expr_t
*
155 oberon_make_char(oberon_context_t
* ctx
, int64_t i
)
157 oberon_expr_t
* expr
;
158 expr
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
159 expr
-> item
.integer
= i
;
160 expr
-> item
.real
= i
;
164 static oberon_expr_t
*
165 oberon_make_real_typed(oberon_context_t
* ctx
, double r
, oberon_type_t
* result
)
167 oberon_expr_t
* expr
;
168 expr
= oberon_new_item(MODE_REAL
, result
, true);
169 expr
-> item
.integer
= r
;
170 expr
-> item
.real
= r
;
174 static oberon_expr_t
*
175 oberon_make_real(oberon_context_t
* ctx
, double r
, bool longmode
)
177 oberon_type_t
* result
;
178 result
= (longmode
) ? (ctx
-> longreal_type
) : (ctx
-> real_type
);
179 return oberon_make_real_typed(ctx
, r
, result
);
182 static oberon_expr_t
*
183 oberon_make_boolean(oberon_context_t
* ctx
, bool cond
)
185 oberon_expr_t
* expr
;
186 expr
= oberon_new_item(MODE_BOOLEAN
, ctx
-> bool_type
, true);
187 expr
-> item
.integer
= cond
;
188 expr
-> item
.real
= cond
;
192 static oberon_expr_t
*
193 oberon_make_set(oberon_context_t
* ctx
, int64_t i
)
195 oberon_expr_t
* expr
;
196 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
197 expr
-> item
.integer
= i
;
198 expr
-> item
.real
= i
;
202 static oberon_expr_t
*
203 oberon_make_set_index(oberon_context_t
* ctx
, int64_t i
)
205 oberon_expr_t
* expr
;
206 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
207 expr
-> item
.integer
= 1 << i
;
208 expr
-> item
.real
= 1 << i
;
212 static oberon_expr_t
*
213 oberon_make_set_range(oberon_context_t
* ctx
, int64_t x
, int64_t y
)
215 oberon_expr_t
* expr
;
216 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
217 expr
-> item
.integer
= (x
<= y
) ? ((2 << y
) - (1 << x
)) : (0);
218 expr
-> item
.real
= expr
-> item
.integer
;
222 // =======================================================================
224 // =======================================================================
226 static oberon_scope_t
*
227 oberon_open_scope(oberon_context_t
* ctx
)
229 oberon_scope_t
* scope
= GC_MALLOC(sizeof *scope
);
230 memset(scope
, 0, sizeof *scope
);
232 oberon_object_t
* list
= GC_MALLOC(sizeof *list
);
233 memset(list
, 0, sizeof *list
);
236 scope
-> list
= list
;
237 scope
-> up
= ctx
-> decl
;
241 scope
-> local
= scope
-> up
-> local
;
242 scope
-> parent
= scope
-> up
-> parent
;
243 scope
-> parent_type
= scope
-> up
-> parent_type
;
244 scope
-> exit_label
= scope
-> up
-> exit_label
;
252 oberon_close_scope(oberon_scope_t
* scope
)
254 oberon_context_t
* ctx
= scope
-> ctx
;
255 ctx
-> decl
= scope
-> up
;
258 static oberon_object_t
*
259 oberon_find_object_in_list(oberon_object_t
* list
, char * name
)
261 oberon_object_t
* x
= list
;
262 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
269 static oberon_object_t
*
270 oberon_find_object(oberon_scope_t
* scope
, char * name
, bool check_it
)
272 oberon_object_t
* result
= NULL
;
274 oberon_scope_t
* s
= scope
;
275 while(result
== NULL
&& s
!= NULL
)
277 result
= oberon_find_object_in_list(s
-> list
, name
);
281 if(check_it
&& result
== NULL
)
283 oberon_error(scope
-> ctx
, "undefined ident %s", name
);
289 static oberon_object_t
*
290 oberon_create_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
)
292 oberon_object_t
* newvar
= GC_MALLOC(sizeof *newvar
);
293 memset(newvar
, 0, sizeof *newvar
);
294 newvar
-> name
= name
;
295 newvar
-> class = class;
296 newvar
-> export
= export
;
297 newvar
-> read_only
= read_only
;
298 newvar
-> local
= scope
-> local
;
299 newvar
-> parent
= scope
-> parent
;
300 newvar
-> parent_type
= scope
-> parent_type
;
301 newvar
-> module
= scope
-> ctx
-> mod
;
305 static oberon_object_t
*
306 oberon_define_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
, bool check_upscope
)
310 if(oberon_find_object(scope
-> up
, name
, false))
312 oberon_error(scope
-> ctx
, "already defined");
316 oberon_object_t
* x
= scope
-> list
;
317 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
324 oberon_error(scope
-> ctx
, "already defined");
327 oberon_object_t
* newvar
;
328 newvar
= oberon_create_object(scope
, name
, class, export
, read_only
);
334 // =======================================================================
336 // =======================================================================
339 oberon_get_char(oberon_context_t
* ctx
)
341 if(ctx
-> code
[ctx
-> code_index
])
343 ctx
-> code_index
+= 1;
344 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
349 oberon_init_scaner(oberon_context_t
* ctx
, const char * code
)
352 ctx
-> code_index
= 0;
353 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
357 oberon_read_ident(oberon_context_t
* ctx
)
360 int i
= ctx
-> code_index
;
362 int c
= ctx
-> code
[i
];
370 char * ident
= GC_MALLOC(len
+ 1);
371 memcpy(ident
, &ctx
->code
[ctx
->code_index
], len
);
374 ctx
-> code_index
= i
;
375 ctx
-> c
= ctx
-> code
[i
];
376 ctx
-> string
= ident
;
377 ctx
-> token
= IDENT
;
379 if(strcmp(ident
, "MODULE") == 0)
381 ctx
-> token
= MODULE
;
383 else if(strcmp(ident
, "END") == 0)
387 else if(strcmp(ident
, "VAR") == 0)
391 else if(strcmp(ident
, "BEGIN") == 0)
393 ctx
-> token
= BEGIN
;
395 else if(strcmp(ident
, "OR") == 0)
399 else if(strcmp(ident
, "DIV") == 0)
403 else if(strcmp(ident
, "MOD") == 0)
407 else if(strcmp(ident
, "PROCEDURE") == 0)
409 ctx
-> token
= PROCEDURE
;
411 else if(strcmp(ident
, "RETURN") == 0)
413 ctx
-> token
= RETURN
;
415 else if(strcmp(ident
, "CONST") == 0)
417 ctx
-> token
= CONST
;
419 else if(strcmp(ident
, "TYPE") == 0)
423 else if(strcmp(ident
, "ARRAY") == 0)
425 ctx
-> token
= ARRAY
;
427 else if(strcmp(ident
, "OF") == 0)
431 else if(strcmp(ident
, "RECORD") == 0)
433 ctx
-> token
= RECORD
;
435 else if(strcmp(ident
, "POINTER") == 0)
437 ctx
-> token
= POINTER
;
439 else if(strcmp(ident
, "TO") == 0)
443 else if(strcmp(ident
, "NIL") == 0)
447 else if(strcmp(ident
, "IMPORT") == 0)
449 ctx
-> token
= IMPORT
;
451 else if(strcmp(ident
, "IN") == 0)
455 else if(strcmp(ident
, "IS") == 0)
459 else if(strcmp(ident
, "IF") == 0)
463 else if(strcmp(ident
, "THEN") == 0)
467 else if(strcmp(ident
, "ELSE") == 0)
471 else if(strcmp(ident
, "ELSIF") == 0)
473 ctx
-> token
= ELSIF
;
475 else if(strcmp(ident
, "WHILE") == 0)
477 ctx
-> token
= WHILE
;
479 else if(strcmp(ident
, "DO") == 0)
483 else if(strcmp(ident
, "REPEAT") == 0)
485 ctx
-> token
= REPEAT
;
487 else if(strcmp(ident
, "UNTIL") == 0)
489 ctx
-> token
= UNTIL
;
491 else if(strcmp(ident
, "FOR") == 0)
495 else if(strcmp(ident
, "BY") == 0)
499 else if(strcmp(ident
, "LOOP") == 0)
503 else if(strcmp(ident
, "EXIT") == 0)
507 else if(strcmp(ident
, "CASE") == 0)
511 else if(strcmp(ident
, "WITH") == 0)
517 #define ISHEXDIGIT(x) \
518 (((x) >= '0' && (x) <= '9') || ((x) >= 'A' && (x) <= 'F'))
521 oberon_read_number(oberon_context_t
* ctx
)
534 * mode = 3 == LONGREAL
538 start_i
= ctx
-> code_index
;
540 while(isdigit(ctx
-> c
))
542 oberon_get_char(ctx
);
545 end_i
= ctx
-> code_index
;
547 if(ISHEXDIGIT(ctx
-> c
))
550 while(ISHEXDIGIT(ctx
-> c
))
552 oberon_get_char(ctx
);
555 end_i
= ctx
-> code_index
;
560 oberon_get_char(ctx
);
562 else if(ctx
-> c
== 'X')
565 oberon_get_char(ctx
);
569 oberon_error(ctx
, "invalid hex number");
572 else if(ctx
-> c
== '.')
574 oberon_get_char(ctx
);
577 /* Чит: избегаем конфликта с DOTDOT */
578 ctx
-> code_index
-= 1;
584 while(isdigit(ctx
-> c
))
586 oberon_get_char(ctx
);
589 if(ctx
-> c
== 'E' || ctx
-> c
== 'D')
591 exp_i
= ctx
-> code_index
;
598 oberon_get_char(ctx
);
600 if(ctx
-> c
== '+' || ctx
-> c
== '-')
602 oberon_get_char(ctx
);
605 while(isdigit(ctx
-> c
))
607 oberon_get_char(ctx
);
611 end_i
= ctx
-> code_index
;
619 oberon_get_char(ctx
);
621 else if(ctx
-> c
== 'X')
624 oberon_get_char(ctx
);
628 int len
= end_i
- start_i
;
629 ident
= GC_MALLOC(len
+ 1);
630 memcpy(ident
, &ctx
-> code
[start_i
], len
);
633 ctx
-> longmode
= false;
636 int i
= exp_i
- start_i
;
638 ctx
-> longmode
= true;
644 integer
= atol(ident
);
646 ctx
-> token
= INTEGER
;
649 sscanf(ident
, "%lx", &integer
);
651 ctx
-> token
= INTEGER
;
655 sscanf(ident
, "%lf", &real
);
660 sscanf(ident
, "%lx", &integer
);
665 oberon_error(ctx
, "oberon_read_number: wat");
669 ctx
-> string
= ident
;
670 ctx
-> integer
= integer
;
675 oberon_skip_space(oberon_context_t
* ctx
)
677 while(isspace(ctx
-> c
))
679 oberon_get_char(ctx
);
684 oberon_read_comment(oberon_context_t
* ctx
)
691 oberon_get_char(ctx
);
694 oberon_get_char(ctx
);
698 else if(ctx
-> c
== '*')
700 oberon_get_char(ctx
);
703 oberon_get_char(ctx
);
707 else if(ctx
-> c
== 0)
709 oberon_error(ctx
, "unterminated comment");
713 oberon_get_char(ctx
);
718 static void oberon_read_string(oberon_context_t
* ctx
)
721 oberon_get_char(ctx
);
723 int start
= ctx
-> code_index
;
725 while(ctx
-> c
!= 0 && ctx
-> c
!= c
)
727 oberon_get_char(ctx
);
732 oberon_error(ctx
, "unterminated string");
735 int end
= ctx
-> code_index
;
737 oberon_get_char(ctx
);
739 char * string
= GC_MALLOC(end
- start
+ 1);
740 strncpy(string
, &ctx
-> code
[start
], end
- start
);
743 ctx
-> token
= STRING
;
744 ctx
-> string
= string
;
745 ctx
-> integer
= string
[0];
748 static void oberon_read_token(oberon_context_t
* ctx
);
751 oberon_read_symbol(oberon_context_t
* ctx
)
760 ctx
-> token
= SEMICOLON
;
761 oberon_get_char(ctx
);
764 ctx
-> token
= COLON
;
765 oberon_get_char(ctx
);
768 ctx
-> token
= ASSIGN
;
769 oberon_get_char(ctx
);
774 oberon_get_char(ctx
);
777 ctx
-> token
= DOTDOT
;
778 oberon_get_char(ctx
);
782 ctx
-> token
= LPAREN
;
783 oberon_get_char(ctx
);
786 oberon_get_char(ctx
);
787 oberon_read_comment(ctx
);
788 oberon_read_token(ctx
);
792 ctx
-> token
= RPAREN
;
793 oberon_get_char(ctx
);
796 ctx
-> token
= EQUAL
;
797 oberon_get_char(ctx
);
801 oberon_get_char(ctx
);
805 oberon_get_char(ctx
);
809 oberon_get_char(ctx
);
813 ctx
-> token
= GREAT
;
814 oberon_get_char(ctx
);
818 oberon_get_char(ctx
);
823 oberon_get_char(ctx
);
826 ctx
-> token
= MINUS
;
827 oberon_get_char(ctx
);
831 oberon_get_char(ctx
);
834 oberon_get_char(ctx
);
835 oberon_error(ctx
, "unstarted comment");
839 ctx
-> token
= SLASH
;
840 oberon_get_char(ctx
);
844 oberon_get_char(ctx
);
848 oberon_get_char(ctx
);
851 ctx
-> token
= COMMA
;
852 oberon_get_char(ctx
);
855 ctx
-> token
= LBRACK
;
856 oberon_get_char(ctx
);
859 ctx
-> token
= RBRACK
;
860 oberon_get_char(ctx
);
863 ctx
-> token
= UPARROW
;
864 oberon_get_char(ctx
);
867 oberon_read_string(ctx
);
870 oberon_read_string(ctx
);
873 ctx
-> token
= LBRACE
;
874 oberon_get_char(ctx
);
877 ctx
-> token
= RBRACE
;
878 oberon_get_char(ctx
);
882 oberon_get_char(ctx
);
885 oberon_error(ctx
, "invalid char %c", ctx
-> c
);
891 oberon_read_token(oberon_context_t
* ctx
)
893 oberon_skip_space(ctx
);
898 oberon_read_ident(ctx
);
902 oberon_read_number(ctx
);
906 oberon_read_symbol(ctx
);
910 // =======================================================================
912 // =======================================================================
914 static void oberon_expect_token(oberon_context_t
* ctx
, int token
);
915 static oberon_expr_t
* oberon_expr(oberon_context_t
* ctx
);
916 static void oberon_assert_token(oberon_context_t
* ctx
, int token
);
917 static char * oberon_assert_ident(oberon_context_t
* ctx
);
918 static void oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
);
919 static oberon_item_t
* oberon_const_expr(oberon_context_t
* ctx
);
920 static oberon_expr_t
* oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
);
921 static bool oberon_is_const(oberon_expr_t
* expr
);
923 static oberon_expr_t
*
924 oberon_make_unary_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
)
926 oberon_expr_t
* expr
;
927 oberon_type_t
* result
;
929 result
= a
-> result
;
933 if(result
-> class == OBERON_TYPE_SET
)
935 if(oberon_is_const(a
))
937 expr
= oberon_make_set(ctx
, ~(a
-> item
.integer
));
941 expr
= oberon_new_operator(OP_COMPLEMENTATION
, result
, a
, NULL
);
944 else if(result
-> class == OBERON_TYPE_INTEGER
)
946 if(oberon_is_const(a
))
948 expr
= oberon_make_integer(ctx
, -(a
-> item
.integer
));
952 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
955 else if(result
-> class == OBERON_TYPE_REAL
)
957 if(oberon_is_const(a
))
959 expr
= oberon_make_real_typed(ctx
, -(a
-> item
.real
), result
);
963 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
968 oberon_error(ctx
, "incompatible operator type");
971 else if(token
== NOT
)
973 if(result
-> class != OBERON_TYPE_BOOLEAN
)
975 oberon_error(ctx
, "incompatible operator type");
978 if(oberon_is_const(a
))
980 expr
= oberon_make_boolean(ctx
, !(a
-> item
.integer
));
984 expr
= oberon_new_operator(OP_LOGIC_NOT
, result
, a
, NULL
);
989 oberon_error(ctx
, "oberon_make_unary_op: wat");
996 oberon_expr_list(oberon_context_t
* ctx
, int * num_expr
, oberon_expr_t
** first
, int const_expr
)
998 oberon_expr_t
* last
;
1003 *first
= last
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1007 *first
= last
= oberon_expr(ctx
);
1009 while(ctx
-> token
== COMMA
)
1011 oberon_assert_token(ctx
, COMMA
);
1012 oberon_expr_t
* current
;
1016 current
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1020 current
= oberon_expr(ctx
);
1023 last
-> next
= current
;
1029 static oberon_expr_t
*
1030 oberon_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1032 oberon_expr_t
* cast
;
1034 if((oberon_is_char_type(pref
) && oberon_is_const_string(expr
) && strlen(expr
-> item
.string
) == 1))
1036 /* Автоматически преобразуем строку единичного размера в символ */
1037 cast
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
1038 cast
-> item
.integer
= expr
-> item
.string
[0];
1040 else if(!oberon_is_some_types(expr
-> result
, pref
))
1042 cast
= oberon_new_operator(OP_CAST
, pref
, expr
, NULL
);
1053 oberon_check_dst(oberon_context_t
* ctx
, oberon_expr_t
* dst
)
1055 if(dst
-> read_only
)
1057 oberon_error(ctx
, "read-only destination");
1060 if(dst
-> is_item
== false)
1062 oberon_error(ctx
, "not variable");
1065 switch(dst
-> item
.mode
)
1076 oberon_error(ctx
, "not variable");
1082 oberon_check_src(oberon_context_t
* ctx
, oberon_expr_t
* src
)
1086 if(src
-> item
.mode
== MODE_TYPE
)
1088 oberon_error(ctx
, "not variable");
1094 oberon_autocast_call(oberon_context_t
* ctx
, oberon_item_t
* desig
)
1096 if(desig
-> mode
!= MODE_CALL
)
1098 oberon_error(ctx
, "expected mode CALL");
1101 oberon_type_t
* fn
= desig
-> parent
-> result
;
1102 int num_args
= desig
-> num_args
;
1103 int num_decl
= fn
-> num_decl
;
1105 if(num_args
< num_decl
)
1107 oberon_error(ctx
, "too few arguments");
1109 else if(num_args
> num_decl
)
1111 oberon_error(ctx
, "too many arguments");
1114 /* Делаем проверку на запись и делаем автокаст */
1115 oberon_expr_t
* casted
[num_args
];
1116 oberon_expr_t
* arg
= desig
-> args
;
1117 oberon_object_t
* param
= fn
-> decl
;
1118 for(int i
= 0; i
< num_args
; i
++)
1120 if(param
-> class == OBERON_CLASS_VAR_PARAM
)
1122 oberon_check_dst(ctx
, arg
);
1123 if(!oberon_is_compatible_arrays(param
, arg
))
1125 oberon_check_compatible_var_param(ctx
, param
-> type
, arg
-> result
);
1128 //casted[i] = oberon_cast_expr(ctx, arg, param -> type);
1132 oberon_check_src(ctx
, arg
);
1133 if(!oberon_is_compatible_arrays(param
, arg
))
1135 oberon_check_assignment_compatible(ctx
, arg
, param
-> type
);
1137 casted
[i
] = oberon_cast_expr(ctx
, arg
, param
-> type
);
1141 param
= param
-> next
;
1144 /* Создаём новый список выражений */
1148 for(int i
= 0; i
< num_args
- 1; i
++)
1150 casted
[i
] -> next
= casted
[i
+ 1];
1152 desig
-> args
= arg
;
1156 static oberon_expr_t
*
1157 oberon_make_call_func(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1159 oberon_type_t
* signature
= item
-> result
;
1160 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1162 oberon_error(ctx
, "not a procedure");
1165 oberon_expr_t
* call
;
1167 if(signature
-> sysproc
)
1169 if(signature
-> genfunc
== NULL
)
1171 oberon_error(ctx
, "not a function-procedure");
1174 call
= signature
-> genfunc(ctx
, num_args
, list_args
);
1178 if(signature
-> base
-> class == OBERON_TYPE_NOTYPE
)
1180 oberon_error(ctx
, "attempt to call procedure in expression");
1183 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1184 call
-> item
.parent
= item
;
1185 call
-> item
.num_args
= num_args
;
1186 call
-> item
.args
= list_args
;
1187 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1194 oberon_make_call_proc(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1196 oberon_type_t
* signature
= item
-> result
;
1197 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1199 oberon_error(ctx
, "not a procedure");
1202 oberon_expr_t
* call
;
1204 if(signature
-> sysproc
)
1206 if(signature
-> genproc
== NULL
)
1208 oberon_error(ctx
, "not a procedure");
1211 signature
-> genproc(ctx
, num_args
, list_args
);
1215 if(signature
-> base
-> class != OBERON_TYPE_NOTYPE
)
1217 oberon_error(ctx
, "attempt to call function as non-typed procedure");
1220 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1221 call
-> item
.parent
= item
;
1222 call
-> item
.num_args
= num_args
;
1223 call
-> item
.args
= list_args
;
1224 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1225 oberon_generate_call_proc(ctx
, call
);
1233 || ((x) == INTEGER) \
1236 || ((x) == STRING) \
1238 || ((x) == LPAREN) \
1241 static oberon_expr_t
*
1242 oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1244 if(expr
-> result
-> class != OBERON_TYPE_POINTER
)
1246 oberon_error(ctx
, "not a pointer");
1249 assert(expr
-> is_item
);
1251 oberon_expr_t
* selector
;
1252 selector
= oberon_new_item(MODE_DEREF
, expr
-> result
-> base
, false);
1253 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1258 static oberon_expr_t
*
1259 oberon_make_array_selector(oberon_context_t
* ctx
, oberon_expr_t
* desig
, oberon_expr_t
* index
)
1261 if(desig
-> result
-> class == OBERON_TYPE_POINTER
)
1263 desig
= oberno_make_dereferencing(ctx
, desig
);
1266 assert(desig
-> is_item
);
1268 if(desig
-> result
-> class != OBERON_TYPE_ARRAY
)
1270 oberon_error(ctx
, "not array");
1273 oberon_type_t
* base
;
1274 base
= desig
-> result
-> base
;
1276 if(index
-> result
-> class != OBERON_TYPE_INTEGER
)
1278 oberon_error(ctx
, "index must be integer");
1281 // Статическая проверка границ массива
1282 if(desig
-> result
-> size
!= 0)
1284 if(index
-> is_item
)
1286 if(index
-> item
.mode
== MODE_INTEGER
)
1288 int arr_size
= desig
-> result
-> size
;
1289 int index_int
= index
-> item
.integer
;
1290 if(index_int
< 0 || index_int
> arr_size
- 1)
1292 oberon_error(ctx
, "not in range (dimension size 0..%i)", arr_size
- 1);
1298 oberon_expr_t
* selector
;
1299 selector
= oberon_new_item(MODE_INDEX
, base
, desig
-> read_only
);
1300 selector
-> item
.parent
= (oberon_item_t
*) desig
;
1301 selector
-> item
.num_args
= 1;
1302 selector
-> item
.args
= index
;
1307 static oberon_expr_t
*
1308 oberon_make_record_selector(oberon_context_t
* ctx
, oberon_expr_t
* expr
, char * name
)
1310 if(expr
-> result
-> class == OBERON_TYPE_POINTER
)
1312 expr
= oberno_make_dereferencing(ctx
, expr
);
1315 assert(expr
-> is_item
);
1317 if(expr
-> result
-> class != OBERON_TYPE_RECORD
)
1319 oberon_error(ctx
, "not record");
1322 oberon_type_t
* rec
= expr
-> result
;
1324 oberon_object_t
* field
;
1325 field
= oberon_find_object(rec
-> scope
, name
, true);
1327 if(field
-> export
== 0)
1329 if(field
-> module
!= ctx
-> mod
)
1331 oberon_error(ctx
, "field not exported");
1335 int read_only
= expr
-> read_only
;
1336 if(field
-> read_only
)
1338 if(field
-> module
!= ctx
-> mod
)
1344 oberon_expr_t
* selector
;
1345 selector
= oberon_new_item(MODE_FIELD
, field
-> type
, read_only
);
1346 selector
-> item
.var
= field
;
1347 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1352 #define ISSELECTOR(x) \
1355 || ((x) == UPARROW) \
1358 static oberon_object_t
*
1359 oberon_qualident(oberon_context_t
* ctx
, char ** xname
, int check
)
1362 oberon_object_t
* x
;
1364 name
= oberon_assert_ident(ctx
);
1365 x
= oberon_find_object(ctx
-> decl
, name
, check
);
1369 if(x
-> class == OBERON_CLASS_MODULE
)
1371 oberon_assert_token(ctx
, DOT
);
1372 name
= oberon_assert_ident(ctx
);
1373 /* Наличие объектов в левых модулях всегда проверяется */
1374 x
= oberon_find_object(x
-> module
-> decl
, name
, 1);
1376 if(x
-> export
== 0)
1378 oberon_error(ctx
, "not exported");
1391 static oberon_expr_t
*
1392 oberon_ident_item(oberon_context_t
* ctx
, char * name
)
1395 oberon_object_t
* x
;
1396 oberon_expr_t
* expr
;
1398 x
= oberon_find_object(ctx
-> decl
, name
, true);
1401 if(x
-> class == OBERON_CLASS_CONST
|| x
-> class == OBERON_CLASS_PROC
)
1406 expr
= oberon_new_item(MODE_VAR
, x
-> type
, read_only
);
1407 expr
-> item
.var
= x
;
1411 static oberon_expr_t
*
1412 oberon_qualident_expr(oberon_context_t
* ctx
)
1414 oberon_object_t
* var
;
1415 oberon_expr_t
* expr
;
1417 var
= oberon_qualident(ctx
, NULL
, 1);
1420 if(var
-> read_only
)
1422 if(var
-> module
!= ctx
-> mod
)
1428 switch(var
-> class)
1430 case OBERON_CLASS_CONST
:
1432 expr
= (oberon_expr_t
*) var
-> value
;
1434 case OBERON_CLASS_TYPE
:
1435 expr
= oberon_new_item(MODE_TYPE
, var
-> type
, read_only
);
1437 case OBERON_CLASS_VAR
:
1438 case OBERON_CLASS_VAR_PARAM
:
1439 case OBERON_CLASS_PARAM
:
1440 expr
= oberon_new_item(MODE_VAR
, var
-> type
, read_only
);
1442 case OBERON_CLASS_PROC
:
1443 expr
= oberon_new_item(MODE_VAR
, var
-> type
, true);
1446 oberon_error(ctx
, "invalid designator");
1450 expr
-> item
.var
= var
;
1455 static oberon_expr_t
*
1456 oberon_designator(oberon_context_t
* ctx
)
1459 oberon_expr_t
* expr
;
1460 oberon_object_t
* objtype
;
1462 expr
= oberon_qualident_expr(ctx
);
1464 while(expr
-> result
-> class != OBERON_TYPE_PROCEDURE
&& ISSELECTOR(ctx
-> token
))
1466 switch(ctx
-> token
)
1469 oberon_assert_token(ctx
, DOT
);
1470 name
= oberon_assert_ident(ctx
);
1471 expr
= oberon_make_record_selector(ctx
, expr
, name
);
1474 oberon_assert_token(ctx
, LBRACK
);
1475 int num_indexes
= 0;
1476 oberon_expr_t
* indexes
= NULL
;
1477 oberon_expr_list(ctx
, &num_indexes
, &indexes
, 0);
1478 oberon_assert_token(ctx
, RBRACK
);
1480 for(int i
= 0; i
< num_indexes
; i
++)
1482 expr
= oberon_make_array_selector(ctx
, expr
, indexes
);
1483 indexes
= indexes
-> next
;
1487 oberon_assert_token(ctx
, UPARROW
);
1488 expr
= oberno_make_dereferencing(ctx
, expr
);
1491 oberon_assert_token(ctx
, LPAREN
);
1492 objtype
= oberon_qualident(ctx
, NULL
, true);
1493 oberon_assert_token(ctx
, RPAREN
);
1494 oberon_check_extension_of(ctx
, expr
-> result
, objtype
-> type
);
1495 expr
= oberon_cast_expr(ctx
, expr
, objtype
-> type
);
1498 oberon_error(ctx
, "oberon_designator: wat");
1506 static oberon_expr_t
*
1507 oberon_opt_func_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1509 /* Если есть скобки - значит вызов. Если нет, то передаём указатель. */
1510 if(ctx
-> token
== LPAREN
)
1512 oberon_assert_token(ctx
, LPAREN
);
1515 oberon_expr_t
* arguments
= NULL
;
1517 if(ISEXPR(ctx
-> token
))
1519 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1522 assert(expr
-> is_item
== 1);
1523 expr
= oberon_make_call_func(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1525 oberon_assert_token(ctx
, RPAREN
);
1532 oberon_opt_proc_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1534 assert(expr
-> is_item
);
1537 oberon_expr_t
* arguments
= NULL
;
1539 if(ctx
-> token
== LPAREN
)
1541 oberon_assert_token(ctx
, LPAREN
);
1543 if(ISEXPR(ctx
-> token
))
1545 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1548 oberon_assert_token(ctx
, RPAREN
);
1551 /* Вызов происходит даже без скобок */
1552 oberon_make_call_proc(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1555 static oberon_expr_t
*
1556 oberon_element(oberon_context_t
* ctx
)
1561 e1
= oberon_expr(ctx
);
1562 oberon_check_src(ctx
, e1
);
1563 if(e1
-> result
-> class != OBERON_TYPE_INTEGER
)
1565 oberon_error(ctx
, "expected integer");
1569 if(ctx
-> token
== DOTDOT
)
1571 oberon_assert_token(ctx
, DOTDOT
);
1572 e2
= oberon_expr(ctx
);
1573 oberon_check_src(ctx
, e2
);
1574 if(e2
-> result
-> class != OBERON_TYPE_INTEGER
)
1576 oberon_error(ctx
, "expected integer");
1580 oberon_expr_t
* set
;
1581 if(e2
== NULL
&& oberon_is_const(e1
))
1583 set
= oberon_make_set_index(ctx
, e1
-> item
.integer
);
1585 else if(e2
!= NULL
&& oberon_is_const(e1
) && oberon_is_const(e2
))
1587 set
= oberon_make_set_range(ctx
, e1
-> item
.integer
, e2
-> item
.integer
);
1591 set
= oberon_new_operator(OP_RANGE
, ctx
-> set_type
, e1
, e2
);
1596 static oberon_expr_t
*
1597 oberon_make_set_union(oberon_context_t
* ctx
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1599 if(oberon_is_const(a
) && oberon_is_const(b
))
1601 return oberon_make_set(ctx
, (a
-> item
.integer
| b
-> item
.integer
));
1605 return oberon_new_operator(OP_UNION
, ctx
-> set_type
, a
, b
);
1609 static oberon_expr_t
*
1610 oberon_set(oberon_context_t
* ctx
)
1612 oberon_expr_t
* set
;
1613 oberon_expr_t
* elements
;
1614 set
= oberon_make_set(ctx
, 0);
1616 oberon_assert_token(ctx
, LBRACE
);
1617 if(ISEXPR(ctx
-> token
))
1619 elements
= oberon_element(ctx
);
1620 set
= oberon_make_set_union(ctx
, set
, elements
);
1621 while(ctx
-> token
== COMMA
)
1623 oberon_assert_token(ctx
, COMMA
);
1624 elements
= oberon_element(ctx
);
1625 set
= oberon_make_set_union(ctx
, set
, elements
);
1628 oberon_assert_token(ctx
, RBRACE
);
1633 static oberon_expr_t
*
1634 oberon_factor(oberon_context_t
* ctx
)
1636 oberon_expr_t
* expr
;
1637 oberon_type_t
* result
;
1639 switch(ctx
-> token
)
1642 expr
= oberon_designator(ctx
);
1643 expr
= oberon_opt_func_parens(ctx
, expr
);
1646 expr
= oberon_make_integer(ctx
, ctx
-> integer
);
1647 oberon_assert_token(ctx
, INTEGER
);
1650 result
= ctx
-> char_type
;
1651 expr
= oberon_new_item(MODE_CHAR
, result
, true);
1652 expr
-> item
.integer
= ctx
-> integer
;
1653 oberon_assert_token(ctx
, CHAR
);
1656 result
= ctx
-> string_type
;
1657 expr
= oberon_new_item(MODE_STRING
, result
, true);
1658 expr
-> item
.string
= ctx
-> string
;
1659 oberon_assert_token(ctx
, STRING
);
1662 expr
= oberon_make_real(ctx
, ctx
-> real
, ctx
-> longmode
);
1663 oberon_assert_token(ctx
, REAL
);
1666 expr
= oberon_set(ctx
);
1669 oberon_assert_token(ctx
, LPAREN
);
1670 expr
= oberon_expr(ctx
);
1671 oberon_assert_token(ctx
, RPAREN
);
1674 oberon_assert_token(ctx
, NOT
);
1675 expr
= oberon_factor(ctx
);
1676 expr
= oberon_make_unary_op(ctx
, NOT
, expr
);
1679 oberon_assert_token(ctx
, NIL
);
1680 expr
= oberon_new_item(MODE_NIL
, ctx
-> nil_type
, true);
1683 oberon_error(ctx
, "invalid expression");
1689 static oberon_expr_t
*
1690 oberon_make_bin_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1692 oberon_expr_t
* expr
;
1693 oberon_type_t
* result
;
1695 oberon_check_compatible_bin_expr_types(ctx
, token
, a
-> result
, b
-> result
);
1696 oberon_check_src(ctx
, a
);
1699 oberon_check_src(ctx
, b
);
1704 if(oberon_is_const(a
) && oberon_is_const(b
))
1706 expr
= oberon_make_boolean(ctx
, (1 << a
-> item
.integer
) & b
-> item
.integer
);
1710 expr
= oberon_new_operator(OP_IN
, ctx
-> bool_type
, a
, b
);
1713 else if(token
== IS
)
1715 oberon_check_type_expr(ctx
, b
);
1716 expr
= oberon_new_operator(OP_IS
, ctx
-> bool_type
, a
, b
);
1718 else if((token
>= EQUAL
&& token
<= GEQ
) || token
== OR
|| token
== AND
)
1720 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1722 if(oberon_is_const(a
) && oberon_is_const(b
)
1723 && (oberon_is_real_type(result
) || oberon_is_integer_type(result
)))
1725 if(oberon_is_real_type(result
))
1727 double x
= a
-> item
.real
;
1728 double y
= b
-> item
.real
;
1731 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1732 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1733 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1734 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1735 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1736 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1737 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1738 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1739 default: assert(0); break;
1742 else if(oberon_is_integer_type(result
))
1744 int64_t x
= a
-> item
.integer
;
1745 int64_t y
= b
-> item
.integer
;
1748 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1749 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1750 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1751 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1752 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1753 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1754 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1755 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1756 default: assert(0); break;
1766 a
= oberon_cast_expr(ctx
, a
, result
);
1767 b
= oberon_cast_expr(ctx
, b
, result
);
1768 result
= ctx
-> bool_type
;
1771 case EQUAL
: expr
= oberon_new_operator(OP_EQ
, result
, a
, b
); break;
1772 case NEQ
: expr
= oberon_new_operator(OP_NEQ
, result
, a
, b
); break;
1773 case LESS
: expr
= oberon_new_operator(OP_LSS
, result
, a
, b
); break;
1774 case LEQ
: expr
= oberon_new_operator(OP_LEQ
, result
, a
, b
); break;
1775 case GREAT
: expr
= oberon_new_operator(OP_GRT
, result
, a
, b
); break;
1776 case GEQ
: expr
= oberon_new_operator(OP_GEQ
, result
, a
, b
); break;
1777 case OR
: expr
= oberon_new_operator(OP_LOGIC_OR
, result
, a
, b
); break;
1778 case AND
: expr
= oberon_new_operator(OP_LOGIC_AND
, result
, a
, b
); break;
1779 default: assert(0); break;
1783 else if(token
== SLASH
)
1785 if(oberon_is_set_type(a
-> result
) && oberon_is_set_type(b
-> result
))
1787 if(oberon_is_const(a
) && oberon_is_const(b
))
1789 int64_t x
= a
-> item
.integer
;
1790 int64_t y
= b
-> item
.integer
;
1791 expr
= oberon_make_set(ctx
, x
^ y
);
1795 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1796 a
= oberon_cast_expr(ctx
, a
, result
);
1797 b
= oberon_cast_expr(ctx
, b
, result
);
1798 expr
= oberon_new_operator(OP_SYM_DIFFERENCE
, result
, a
, b
);
1803 result
= oberon_get_longer_real_type(ctx
, a
-> result
, b
-> result
);
1804 if(oberon_is_const(a
) && oberon_is_const(b
))
1806 double x
= a
-> item
.real
;
1807 double y
= b
-> item
.real
;
1808 expr
= oberon_make_real_typed(ctx
, x
/ y
, result
);
1812 a
= oberon_cast_expr(ctx
, a
, result
);
1813 b
= oberon_cast_expr(ctx
, b
, result
);
1814 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
1820 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1822 if(oberon_is_const(a
) && oberon_is_const(b
))
1824 if(oberon_is_set_type(result
))
1826 int64_t x
= a
-> item
.integer
;
1827 int64_t y
= b
-> item
.integer
;
1830 case PLUS
: expr
= oberon_make_set(ctx
, x
| y
); break;
1831 case MINUS
: expr
= oberon_make_set(ctx
, x
& ~y
); break;
1832 case STAR
: expr
= oberon_make_set(ctx
, x
& y
); break;
1833 default: assert(0); break;
1836 if(oberon_is_real_type(result
))
1838 double x
= a
-> item
.real
;
1839 double y
= b
-> item
.real
;
1842 case PLUS
: expr
= oberon_make_real_typed(ctx
, x
+ y
, result
); break;
1843 case MINUS
: expr
= oberon_make_real_typed(ctx
, x
- y
, result
); break;
1844 case STAR
: expr
= oberon_make_real_typed(ctx
, x
* y
, result
); break;
1845 default: assert(0); break;
1848 else if(oberon_is_integer_type(result
))
1850 int64_t x
= a
-> item
.integer
;
1851 int64_t y
= b
-> item
.integer
;
1854 case PLUS
: expr
= oberon_make_integer(ctx
, x
+ y
); break;
1855 case MINUS
: expr
= oberon_make_integer(ctx
, x
- y
); break;
1856 case STAR
: expr
= oberon_make_integer(ctx
, x
* y
); break;
1857 case DIV
: expr
= oberon_make_integer(ctx
, x
/ y
); break;
1858 case MOD
: expr
= oberon_make_integer(ctx
, x
% y
); break;
1859 default: assert(0); break;
1869 a
= oberon_cast_expr(ctx
, a
, result
);
1870 b
= oberon_cast_expr(ctx
, b
, result
);
1873 if(oberon_is_set_type(result
))
1878 expr
= oberon_new_operator(OP_UNION
, result
, a
, b
);
1881 expr
= oberon_new_operator(OP_DIFFERENCE
, result
, a
, b
);
1884 expr
= oberon_new_operator(OP_INTERSECTION
, result
, a
, b
);
1891 else if(oberon_is_number_type(result
))
1896 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
1899 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
1902 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
1919 #define ISMULOP(x) \
1920 ((x) >= STAR && (x) <= AND)
1922 static oberon_expr_t
*
1923 oberon_term_expr(oberon_context_t
* ctx
)
1925 oberon_expr_t
* expr
;
1927 expr
= oberon_factor(ctx
);
1928 while(ISMULOP(ctx
-> token
))
1930 int token
= ctx
-> token
;
1931 oberon_read_token(ctx
);
1933 oberon_expr_t
* inter
= oberon_factor(ctx
);
1934 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
1940 #define ISADDOP(x) \
1941 ((x) >= PLUS && (x) <= OR)
1943 static oberon_expr_t
*
1944 oberon_simple_expr(oberon_context_t
* ctx
)
1946 oberon_expr_t
* expr
;
1949 if(ctx
-> token
== PLUS
)
1952 oberon_assert_token(ctx
, PLUS
);
1954 else if(ctx
-> token
== MINUS
)
1957 oberon_assert_token(ctx
, MINUS
);
1960 expr
= oberon_term_expr(ctx
);
1962 while(ISADDOP(ctx
-> token
))
1964 int token
= ctx
-> token
;
1965 oberon_read_token(ctx
);
1967 oberon_expr_t
* inter
= oberon_term_expr(ctx
);
1968 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
1973 expr
= oberon_make_unary_op(ctx
, MINUS
, expr
);
1979 #define ISRELATION(x) \
1980 ((x) >= EQUAL && (x) <= IS)
1982 static oberon_expr_t
*
1983 oberon_expr(oberon_context_t
* ctx
)
1985 oberon_expr_t
* expr
;
1987 expr
= oberon_simple_expr(ctx
);
1988 while(ISRELATION(ctx
-> token
))
1990 int token
= ctx
-> token
;
1991 oberon_read_token(ctx
);
1993 oberon_expr_t
* inter
= oberon_simple_expr(ctx
);
1994 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2001 oberon_is_const(oberon_expr_t
* expr
)
2003 if(expr
-> is_item
== false)
2008 switch(expr
-> item
.mode
)
2029 oberon_check_const(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2031 if(!oberon_is_const(expr
))
2033 oberon_error(ctx
, "const expression are required");
2037 static oberon_item_t
*
2038 oberon_const_expr(oberon_context_t
* ctx
)
2040 oberon_expr_t
* expr
;
2041 expr
= oberon_expr(ctx
);
2042 oberon_check_const(ctx
, expr
);
2043 return (oberon_item_t
*) expr
;
2046 // =======================================================================
2048 // =======================================================================
2050 static void oberon_decl_seq(oberon_context_t
* ctx
);
2051 static void oberon_statement_seq(oberon_context_t
* ctx
);
2052 static void oberon_initialize_decl(oberon_context_t
* ctx
);
2055 oberon_expect_token(oberon_context_t
* ctx
, int token
)
2057 if(ctx
-> token
!= token
)
2059 oberon_error(ctx
, "unexpected token %i (%i)", ctx
-> token
, token
);
2064 oberon_assert_token(oberon_context_t
* ctx
, int token
)
2066 oberon_expect_token(ctx
, token
);
2067 oberon_read_token(ctx
);
2071 oberon_assert_ident(oberon_context_t
* ctx
)
2073 oberon_expect_token(ctx
, IDENT
);
2074 char * ident
= ctx
-> string
;
2075 oberon_read_token(ctx
);
2080 oberon_def(oberon_context_t
* ctx
, int * export
, int * read_only
)
2082 switch(ctx
-> token
)
2085 oberon_assert_token(ctx
, STAR
);
2090 oberon_assert_token(ctx
, MINUS
);
2101 static oberon_object_t
*
2102 oberon_ident_def(oberon_context_t
* ctx
, int class, bool check_upscope
)
2107 oberon_object_t
* x
;
2109 name
= oberon_assert_ident(ctx
);
2110 oberon_def(ctx
, &export
, &read_only
);
2112 x
= oberon_define_object(ctx
-> decl
, name
, class, export
, read_only
, check_upscope
);
2117 oberon_ident_list(oberon_context_t
* ctx
, int class, bool check_upscope
, int * num
, oberon_object_t
** list
)
2120 *list
= oberon_ident_def(ctx
, class, check_upscope
);
2121 while(ctx
-> token
== COMMA
)
2123 oberon_assert_token(ctx
, COMMA
);
2124 oberon_ident_def(ctx
, class, check_upscope
);
2130 oberon_var_decl(oberon_context_t
* ctx
)
2133 oberon_object_t
* list
;
2134 oberon_type_t
* type
;
2135 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2137 oberon_ident_list(ctx
, OBERON_CLASS_VAR
, false, &num
, &list
);
2138 oberon_assert_token(ctx
, COLON
);
2139 oberon_type(ctx
, &type
);
2141 oberon_object_t
* var
= list
;
2142 for(int i
= 0; i
< num
; i
++)
2149 static oberon_object_t
*
2150 oberon_fp_section(oberon_context_t
* ctx
, int * num_decl
)
2152 int class = OBERON_CLASS_PARAM
;
2153 if(ctx
-> token
== VAR
)
2155 oberon_read_token(ctx
);
2156 class = OBERON_CLASS_VAR_PARAM
;
2160 oberon_object_t
* list
;
2161 oberon_ident_list(ctx
, class, false, &num
, &list
);
2163 oberon_assert_token(ctx
, COLON
);
2165 oberon_type_t
* type
;
2166 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2167 oberon_type(ctx
, &type
);
2169 oberon_object_t
* param
= list
;
2170 for(int i
= 0; i
< num
; i
++)
2172 param
-> type
= type
;
2173 param
= param
-> next
;
2180 #define ISFPSECTION \
2181 ((ctx -> token == VAR) || (ctx -> token == IDENT))
2184 oberon_formal_pars(oberon_context_t
* ctx
, oberon_type_t
* signature
)
2186 oberon_assert_token(ctx
, LPAREN
);
2190 signature
-> decl
= oberon_fp_section(ctx
, &signature
-> num_decl
);
2191 while(ctx
-> token
== SEMICOLON
)
2193 oberon_assert_token(ctx
, SEMICOLON
);
2194 oberon_fp_section(ctx
, &signature
-> num_decl
);
2198 oberon_assert_token(ctx
, RPAREN
);
2200 if(ctx
-> token
== COLON
)
2202 oberon_assert_token(ctx
, COLON
);
2204 oberon_object_t
* typeobj
;
2205 typeobj
= oberon_qualident(ctx
, NULL
, 1);
2206 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2208 oberon_error(ctx
, "function result is not type");
2210 if(typeobj
-> type
-> class == OBERON_TYPE_RECORD
2211 || typeobj
-> type
-> class == OBERON_TYPE_ARRAY
)
2213 oberon_error(ctx
, "records or arrays could not be result of function");
2215 signature
-> base
= typeobj
-> type
;
2220 oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
)
2222 oberon_type_t
* signature
;
2224 signature
-> class = OBERON_TYPE_PROCEDURE
;
2225 signature
-> num_decl
= 0;
2226 signature
-> base
= ctx
-> notype_type
;
2227 signature
-> decl
= NULL
;
2229 if(ctx
-> token
== LPAREN
)
2231 oberon_formal_pars(ctx
, signature
);
2236 oberon_compare_signatures(oberon_context_t
* ctx
, oberon_type_t
* a
, oberon_type_t
* b
)
2238 if(a
-> num_decl
!= b
-> num_decl
)
2240 oberon_error(ctx
, "number parameters not matched");
2243 int num_param
= a
-> num_decl
;
2244 oberon_object_t
* param_a
= a
-> decl
;
2245 oberon_object_t
* param_b
= b
-> decl
;
2246 for(int i
= 0; i
< num_param
; i
++)
2248 if(strcmp(param_a
-> name
, param_b
-> name
) != 0)
2250 oberon_error(ctx
, "param %i name not matched", i
+ 1);
2253 if(param_a
-> type
!= param_b
-> type
)
2255 oberon_error(ctx
, "param %i type not matched", i
+ 1);
2258 param_a
= param_a
-> next
;
2259 param_b
= param_b
-> next
;
2264 oberon_make_return(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2266 oberon_object_t
* proc
= ctx
-> decl
-> parent
;
2267 oberon_type_t
* result_type
= proc
-> type
-> base
;
2269 if(result_type
-> class == OBERON_TYPE_NOTYPE
)
2273 oberon_error(ctx
, "procedure has no result type");
2280 oberon_error(ctx
, "procedure requires expression on result");
2283 oberon_check_src(ctx
, expr
);
2284 oberon_check_assignment_compatible(ctx
, expr
, result_type
);
2285 expr
= oberon_cast_expr(ctx
, expr
, result_type
);
2288 proc
-> has_return
= 1;
2290 oberon_generate_return(ctx
, expr
);
2294 oberon_proc_decl_body(oberon_context_t
* ctx
, oberon_object_t
* proc
)
2296 oberon_assert_token(ctx
, SEMICOLON
);
2298 ctx
-> decl
= proc
-> scope
;
2300 oberon_decl_seq(ctx
);
2302 oberon_generate_begin_proc(ctx
, proc
);
2304 if(ctx
-> token
== BEGIN
)
2306 oberon_assert_token(ctx
, BEGIN
);
2307 oberon_statement_seq(ctx
);
2310 oberon_assert_token(ctx
, END
);
2311 char * name
= oberon_assert_ident(ctx
);
2312 if(strcmp(name
, proc
-> name
) != 0)
2314 oberon_error(ctx
, "procedure name not matched");
2317 if(proc
-> type
-> base
-> class == OBERON_TYPE_NOTYPE
2318 && proc
-> has_return
== 0)
2320 oberon_make_return(ctx
, NULL
);
2323 if(proc
-> has_return
== 0)
2325 oberon_error(ctx
, "procedure requires return");
2328 oberon_generate_end_proc(ctx
);
2329 oberon_close_scope(ctx
-> decl
);
2333 oberon_proc_decl(oberon_context_t
* ctx
)
2335 oberon_assert_token(ctx
, PROCEDURE
);
2338 if(ctx
-> token
== UPARROW
)
2340 oberon_assert_token(ctx
, UPARROW
);
2347 name
= oberon_assert_ident(ctx
);
2348 oberon_def(ctx
, &export
, &read_only
);
2350 oberon_scope_t
* proc_scope
;
2351 proc_scope
= oberon_open_scope(ctx
);
2352 ctx
-> decl
-> local
= 1;
2354 oberon_type_t
* signature
;
2355 signature
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2356 oberon_opt_formal_pars(ctx
, &signature
);
2358 //oberon_initialize_decl(ctx);
2359 oberon_generator_init_type(ctx
, signature
);
2360 oberon_close_scope(ctx
-> decl
);
2362 oberon_object_t
* proc
;
2363 proc
= oberon_find_object(ctx
-> decl
, name
, 0);
2366 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, export
, read_only
, false);
2367 proc
-> type
= signature
;
2368 proc
-> scope
= proc_scope
;
2369 oberon_generator_init_proc(ctx
, proc
);
2373 if(proc
-> class != OBERON_CLASS_PROC
)
2375 oberon_error(ctx
, "mult definition");
2382 oberon_error(ctx
, "mult procedure definition");
2386 if(proc
-> export
!= export
|| proc
-> read_only
!= read_only
)
2388 oberon_error(ctx
, "export type not matched");
2391 oberon_compare_signatures(ctx
, proc
-> type
, signature
);
2394 proc_scope
-> parent
= proc
;
2395 oberon_object_t
* param
= proc_scope
-> list
-> next
;
2398 param
-> parent
= proc
;
2399 param
= param
-> next
;
2405 oberon_proc_decl_body(ctx
, proc
);
2410 oberon_const_decl(oberon_context_t
* ctx
)
2412 oberon_item_t
* value
;
2413 oberon_object_t
* constant
;
2415 constant
= oberon_ident_def(ctx
, OBERON_CLASS_CONST
, false);
2416 oberon_assert_token(ctx
, EQUAL
);
2417 value
= oberon_const_expr(ctx
);
2418 constant
-> value
= value
;
2422 oberon_make_array_type(oberon_context_t
* ctx
, oberon_expr_t
* size
, oberon_type_t
* base
, oberon_type_t
** type
)
2424 if(size
-> is_item
== 0)
2426 oberon_error(ctx
, "requires constant");
2429 if(size
-> item
.mode
!= MODE_INTEGER
)
2431 oberon_error(ctx
, "requires integer constant");
2434 oberon_type_t
* arr
;
2436 arr
-> class = OBERON_TYPE_ARRAY
;
2437 arr
-> size
= size
-> item
.integer
;
2442 oberon_qualident_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2445 oberon_object_t
* to
;
2447 to
= oberon_qualident(ctx
, &name
, 0);
2449 //name = oberon_assert_ident(ctx);
2450 //to = oberon_find_object(ctx -> decl, name, 0);
2454 if(to
-> class != OBERON_CLASS_TYPE
)
2456 oberon_error(ctx
, "not a type");
2461 to
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, false, false, false);
2462 to
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2468 static void oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
);
2471 * Правило граматики "type". Указатель type должен указывать на существующий объект!
2475 oberon_make_multiarray(oberon_context_t
* ctx
, oberon_expr_t
* sizes
, oberon_type_t
* base
, oberon_type_t
** type
)
2483 oberon_type_t
* dim
;
2484 dim
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2486 oberon_make_multiarray(ctx
, sizes
-> next
, base
, &dim
);
2488 oberon_make_array_type(ctx
, sizes
, dim
, type
);
2492 oberon_make_open_array(oberon_context_t
* ctx
, oberon_type_t
* base
, oberon_type_t
* type
)
2494 type
-> class = OBERON_TYPE_ARRAY
;
2496 type
-> base
= base
;
2500 oberon_field_list(oberon_context_t
* ctx
, oberon_type_t
* rec
, oberon_scope_t
* modscope
)
2502 if(ctx
-> token
== IDENT
)
2505 oberon_object_t
* list
;
2506 oberon_type_t
* type
;
2507 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2509 oberon_ident_list(ctx
, OBERON_CLASS_FIELD
, true, &num
, &list
);
2510 oberon_assert_token(ctx
, COLON
);
2512 oberon_scope_t
* current
= ctx
-> decl
;
2513 ctx
-> decl
= modscope
;
2514 oberon_type(ctx
, &type
);
2515 ctx
-> decl
= current
;
2517 oberon_object_t
* field
= list
;
2518 for(int i
= 0; i
< num
; i
++)
2520 field
-> type
= type
;
2521 field
= field
-> next
;
2524 rec
-> num_decl
+= num
;
2529 oberon_type_record_body(oberon_context_t
* ctx
, oberon_type_t
* rec
)
2531 oberon_scope_t
* modscope
= ctx
-> mod
-> decl
;
2532 oberon_scope_t
* oldscope
= ctx
-> decl
;
2533 ctx
-> decl
= modscope
;
2535 if(ctx
-> token
== LPAREN
)
2537 oberon_assert_token(ctx
, LPAREN
);
2539 oberon_object_t
* typeobj
;
2540 typeobj
= oberon_qualident(ctx
, NULL
, true);
2542 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2544 oberon_error(ctx
, "base must be type");
2547 oberon_type_t
* base
= typeobj
-> type
;
2548 if(base
-> class == OBERON_TYPE_POINTER
)
2550 base
= base
-> base
;
2553 if(base
-> class != OBERON_TYPE_RECORD
)
2555 oberon_error(ctx
, "base must be record type");
2559 ctx
-> decl
= base
-> scope
;
2561 oberon_assert_token(ctx
, RPAREN
);
2568 oberon_scope_t
* this_scope
;
2569 this_scope
= oberon_open_scope(ctx
);
2570 this_scope
-> local
= true;
2571 this_scope
-> parent
= NULL
;
2572 this_scope
-> parent_type
= rec
;
2574 oberon_field_list(ctx
, rec
, modscope
);
2575 while(ctx
-> token
== SEMICOLON
)
2577 oberon_assert_token(ctx
, SEMICOLON
);
2578 oberon_field_list(ctx
, rec
, modscope
);
2581 rec
-> scope
= this_scope
;
2582 rec
-> decl
= this_scope
-> list
-> next
;
2583 ctx
-> decl
= oldscope
;
2587 oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2589 if(ctx
-> token
== IDENT
)
2591 oberon_qualident_type(ctx
, type
);
2593 else if(ctx
-> token
== ARRAY
)
2595 oberon_assert_token(ctx
, ARRAY
);
2598 oberon_expr_t
* sizes
;
2600 if(ISEXPR(ctx
-> token
))
2602 oberon_expr_list(ctx
, &num_sizes
, &sizes
, 1);
2605 oberon_assert_token(ctx
, OF
);
2607 oberon_type_t
* base
;
2608 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2609 oberon_type(ctx
, &base
);
2613 oberon_make_open_array(ctx
, base
, *type
);
2617 oberon_make_multiarray(ctx
, sizes
, base
, type
);
2620 else if(ctx
-> token
== RECORD
)
2622 oberon_type_t
* rec
;
2624 rec
-> class = OBERON_TYPE_RECORD
;
2625 rec
-> module
= ctx
-> mod
;
2627 oberon_assert_token(ctx
, RECORD
);
2628 oberon_type_record_body(ctx
, rec
);
2629 oberon_assert_token(ctx
, END
);
2633 else if(ctx
-> token
== POINTER
)
2635 oberon_assert_token(ctx
, POINTER
);
2636 oberon_assert_token(ctx
, TO
);
2638 oberon_type_t
* base
;
2639 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2640 oberon_type(ctx
, &base
);
2642 oberon_type_t
* ptr
;
2644 ptr
-> class = OBERON_TYPE_POINTER
;
2647 else if(ctx
-> token
== PROCEDURE
)
2649 oberon_open_scope(ctx
);
2650 oberon_assert_token(ctx
, PROCEDURE
);
2651 oberon_opt_formal_pars(ctx
, type
);
2652 oberon_close_scope(ctx
-> decl
);
2656 oberon_error(ctx
, "invalid type declaration");
2661 oberon_type_decl(oberon_context_t
* ctx
)
2664 oberon_object_t
* newtype
;
2665 oberon_type_t
* type
;
2669 name
= oberon_assert_ident(ctx
);
2670 oberon_def(ctx
, &export
, &read_only
);
2672 newtype
= oberon_find_object(ctx
-> decl
, name
, 0);
2675 newtype
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, export
, read_only
, false);
2676 newtype
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2677 assert(newtype
-> type
);
2681 if(newtype
-> class != OBERON_CLASS_TYPE
)
2683 oberon_error(ctx
, "mult definition");
2686 if(newtype
-> linked
)
2688 oberon_error(ctx
, "mult definition - already linked");
2691 newtype
-> export
= export
;
2692 newtype
-> read_only
= read_only
;
2695 oberon_assert_token(ctx
, EQUAL
);
2697 type
= newtype
-> type
;
2698 oberon_type(ctx
, &type
);
2700 if(type
-> class == OBERON_TYPE_NOTYPE
)
2702 oberon_error(ctx
, "recursive alias declaration");
2705 newtype
-> type
= type
;
2706 newtype
-> linked
= 1;
2709 static void oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2710 static void oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2713 oberon_prevent_recursive_pointer(oberon_context_t
* ctx
, oberon_type_t
* type
)
2715 if(type
-> class != OBERON_TYPE_POINTER
2716 && type
-> class != OBERON_TYPE_ARRAY
)
2721 if(type
-> recursive
)
2723 oberon_error(ctx
, "recursive pointer declaration");
2726 if(type
-> class == OBERON_TYPE_POINTER
2727 && type
-> base
-> class == OBERON_TYPE_POINTER
)
2729 oberon_error(ctx
, "attempt to make pointer to pointer");
2732 type
-> recursive
= 1;
2734 oberon_prevent_recursive_pointer(ctx
, type
-> base
);
2736 type
-> recursive
= 0;
2740 oberon_prevent_recursive_record(oberon_context_t
* ctx
, oberon_type_t
* type
)
2742 if(type
-> class != OBERON_TYPE_RECORD
)
2747 if(type
-> recursive
)
2749 oberon_error(ctx
, "recursive record declaration");
2752 type
-> recursive
= 1;
2756 oberon_prevent_recursive_record(ctx
, type
-> base
);
2759 int num_fields
= type
-> num_decl
;
2760 oberon_object_t
* field
= type
-> decl
;
2761 for(int i
= 0; i
< num_fields
; i
++)
2763 oberon_prevent_recursive_object(ctx
, field
);
2764 field
= field
-> next
;
2767 type
-> recursive
= 0;
2770 oberon_prevent_recursive_procedure(oberon_context_t
* ctx
, oberon_type_t
* type
)
2772 if(type
-> class != OBERON_TYPE_PROCEDURE
)
2777 if(type
-> recursive
)
2779 oberon_error(ctx
, "recursive procedure declaration");
2782 type
-> recursive
= 1;
2784 int num_fields
= type
-> num_decl
;
2785 oberon_object_t
* field
= type
-> decl
;
2786 for(int i
= 0; i
< num_fields
; i
++)
2788 oberon_prevent_recursive_object(ctx
, field
);
2789 field
= field
-> next
;
2792 type
-> recursive
= 0;
2796 oberon_prevent_recursive_array(oberon_context_t
* ctx
, oberon_type_t
* type
)
2798 if(type
-> class != OBERON_TYPE_ARRAY
)
2803 if(type
-> recursive
)
2805 oberon_error(ctx
, "recursive array declaration");
2808 type
-> recursive
= 1;
2810 oberon_prevent_recursive_type(ctx
, type
-> base
);
2812 type
-> recursive
= 0;
2816 oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2818 if(type
-> class == OBERON_TYPE_POINTER
)
2820 oberon_prevent_recursive_pointer(ctx
, type
);
2822 else if(type
-> class == OBERON_TYPE_RECORD
)
2824 oberon_prevent_recursive_record(ctx
, type
);
2826 else if(type
-> class == OBERON_TYPE_ARRAY
)
2828 oberon_prevent_recursive_array(ctx
, type
);
2830 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2832 oberon_prevent_recursive_procedure(ctx
, type
);
2837 oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2841 case OBERON_CLASS_VAR
:
2842 case OBERON_CLASS_TYPE
:
2843 case OBERON_CLASS_PARAM
:
2844 case OBERON_CLASS_VAR_PARAM
:
2845 case OBERON_CLASS_FIELD
:
2846 oberon_prevent_recursive_type(ctx
, x
-> type
);
2848 case OBERON_CLASS_CONST
:
2849 case OBERON_CLASS_PROC
:
2850 case OBERON_CLASS_MODULE
:
2853 oberon_error(ctx
, "oberon_prevent_recursive_object: wat");
2859 oberon_prevent_recursive_decl(oberon_context_t
* ctx
)
2861 oberon_object_t
* x
= ctx
-> decl
-> list
-> next
;
2865 oberon_prevent_recursive_object(ctx
, x
);
2870 static void oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2871 static void oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2874 oberon_initialize_record_fields(oberon_context_t
* ctx
, oberon_type_t
* type
)
2876 if(type
-> class != OBERON_TYPE_RECORD
)
2881 int num_fields
= type
-> num_decl
;
2882 oberon_object_t
* field
= type
-> decl
;
2883 for(int i
= 0; i
< num_fields
; i
++)
2885 if(field
-> type
-> class == OBERON_TYPE_POINTER
)
2887 oberon_initialize_type(ctx
, field
-> type
);
2890 oberon_initialize_object(ctx
, field
);
2891 field
= field
-> next
;
2894 oberon_generator_init_record(ctx
, type
);
2898 oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2900 if(type
-> class == OBERON_TYPE_NOTYPE
)
2902 oberon_error(ctx
, "undeclarated type");
2905 if(type
-> initialized
)
2910 type
-> initialized
= 1;
2912 if(type
-> class == OBERON_TYPE_POINTER
)
2914 oberon_initialize_type(ctx
, type
-> base
);
2915 oberon_generator_init_type(ctx
, type
);
2917 else if(type
-> class == OBERON_TYPE_ARRAY
)
2919 if(type
-> size
!= 0)
2921 if(type
-> base
-> class == OBERON_TYPE_ARRAY
)
2923 if(type
-> base
-> size
== 0)
2925 oberon_error(ctx
, "open array not allowed as array element");
2930 oberon_initialize_type(ctx
, type
-> base
);
2931 oberon_generator_init_type(ctx
, type
);
2933 else if(type
-> class == OBERON_TYPE_RECORD
)
2935 oberon_generator_init_type(ctx
, type
);
2936 oberon_initialize_record_fields(ctx
, type
);
2938 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2940 int num_fields
= type
-> num_decl
;
2941 oberon_object_t
* field
= type
-> decl
;
2942 for(int i
= 0; i
< num_fields
; i
++)
2944 //oberon_initialize_object(ctx, field);
2945 oberon_initialize_type(ctx
, field
-> type
);
2946 field
= field
-> next
;
2949 oberon_generator_init_type(ctx
, type
);
2953 oberon_generator_init_type(ctx
, type
);
2958 oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2960 if(x
-> initialized
)
2965 x
-> initialized
= 1;
2969 case OBERON_CLASS_TYPE
:
2970 oberon_initialize_type(ctx
, x
-> type
);
2972 case OBERON_CLASS_VAR
:
2973 case OBERON_CLASS_FIELD
:
2974 if(x
-> type
-> class == OBERON_TYPE_ARRAY
)
2976 if(x
-> type
-> size
== 0)
2978 oberon_error(ctx
, "open array not allowed as variable or field");
2981 oberon_initialize_type(ctx
, x
-> type
);
2982 oberon_generator_init_var(ctx
, x
);
2984 case OBERON_CLASS_PARAM
:
2985 case OBERON_CLASS_VAR_PARAM
:
2986 oberon_initialize_type(ctx
, x
-> type
);
2987 oberon_generator_init_var(ctx
, x
);
2989 case OBERON_CLASS_CONST
:
2990 case OBERON_CLASS_PROC
:
2991 case OBERON_CLASS_MODULE
:
2994 oberon_error(ctx
, "oberon_initialize_object: wat");
3000 oberon_initialize_decl(oberon_context_t
* ctx
)
3002 oberon_object_t
* x
= ctx
-> decl
-> list
;
3006 oberon_initialize_object(ctx
, x
-> next
);
3012 oberon_prevent_undeclarated_procedures(oberon_context_t
* ctx
)
3014 oberon_object_t
* x
= ctx
-> decl
-> list
;
3018 if(x
-> next
-> class == OBERON_CLASS_PROC
)
3020 if(x
-> next
-> linked
== 0)
3022 oberon_error(ctx
, "unresolved forward declaration");
3030 oberon_decl_seq(oberon_context_t
* ctx
)
3032 if(ctx
-> token
== CONST
)
3034 oberon_assert_token(ctx
, CONST
);
3035 while(ctx
-> token
== IDENT
)
3037 oberon_const_decl(ctx
);
3038 oberon_assert_token(ctx
, SEMICOLON
);
3042 if(ctx
-> token
== TYPE
)
3044 oberon_assert_token(ctx
, TYPE
);
3045 while(ctx
-> token
== IDENT
)
3047 oberon_type_decl(ctx
);
3048 oberon_assert_token(ctx
, SEMICOLON
);
3052 if(ctx
-> token
== VAR
)
3054 oberon_assert_token(ctx
, VAR
);
3055 while(ctx
-> token
== IDENT
)
3057 oberon_var_decl(ctx
);
3058 oberon_assert_token(ctx
, SEMICOLON
);
3062 oberon_prevent_recursive_decl(ctx
);
3063 oberon_initialize_decl(ctx
);
3065 while(ctx
-> token
== PROCEDURE
)
3067 oberon_proc_decl(ctx
);
3068 oberon_assert_token(ctx
, SEMICOLON
);
3071 oberon_prevent_undeclarated_procedures(ctx
);
3074 static oberon_expr_t
*
3075 oberon_make_temp_var_item(oberon_context_t
* ctx
, oberon_type_t
* type
)
3077 oberon_object_t
* x
;
3078 oberon_expr_t
* expr
;
3080 x
= oberon_create_object(ctx
-> decl
, "TEMP", OBERON_CLASS_VAR
, false, false);
3083 oberon_generator_init_temp_var(ctx
, x
);
3085 expr
= oberon_new_item(MODE_VAR
, type
, false);
3086 expr
-> item
.var
= x
;
3091 oberon_statement_seq(oberon_context_t
* ctx
);
3094 oberon_assign(oberon_context_t
* ctx
, oberon_expr_t
* src
, oberon_expr_t
* dst
)
3096 oberon_check_dst(ctx
, dst
);
3097 oberon_check_assignment_compatible(ctx
, src
, dst
-> result
);
3099 if(oberon_is_array_of_char_type(dst
-> result
)
3100 && oberon_is_string_type(src
-> result
))
3103 oberon_make_copy_call(ctx
, 2, src
);
3107 src
= oberon_cast_expr(ctx
, src
, dst
-> result
);
3108 oberon_generate_assign(ctx
, src
, dst
);
3112 static oberon_expr_t
*
3113 oberon_case_labels(oberon_context_t
* ctx
, oberon_expr_t
* val
)
3117 oberon_expr_t
* cond
;
3118 oberon_expr_t
* cond2
;
3120 e1
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3123 if(ctx
-> token
== DOTDOT
)
3125 oberon_assert_token(ctx
, DOTDOT
);
3126 e2
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3132 cond
= oberon_make_bin_op(ctx
, EQUAL
, val
, e1
);
3136 /* val >= e1 && val <= e2 */
3137 cond
= oberon_make_bin_op(ctx
, GEQ
, val
, e1
);
3138 cond2
= oberon_make_bin_op(ctx
, LEQ
, val
, e2
);
3139 cond
= oberon_make_bin_op(ctx
, AND
, cond
, cond2
);
3146 oberon_case(oberon_context_t
* ctx
, oberon_expr_t
* val
, gen_label_t
* end
)
3148 oberon_expr_t
* cond
;
3149 oberon_expr_t
* cond2
;
3150 gen_label_t
* this_end
;
3152 if(ISEXPR(ctx
-> token
))
3154 this_end
= oberon_generator_reserve_label(ctx
);
3156 cond
= oberon_case_labels(ctx
, val
);
3157 while(ctx
-> token
== COMMA
)
3159 oberon_assert_token(ctx
, COMMA
);
3161 cond2
= oberon_case_labels(ctx
, val
);
3162 cond
= oberon_make_bin_op(ctx
, OR
, cond
, cond2
);
3164 oberon_assert_token(ctx
, COLON
);
3166 oberon_generate_branch(ctx
, cond
, false, this_end
);
3167 oberon_statement_seq(ctx
);
3168 oberon_generate_goto(ctx
, end
);
3170 oberon_generate_label(ctx
, this_end
);
3175 oberon_case_statement(oberon_context_t
* ctx
)
3177 oberon_expr_t
* val
;
3178 oberon_expr_t
* expr
;
3181 end
= oberon_generator_reserve_label(ctx
);
3183 oberon_assert_token(ctx
, CASE
);
3184 expr
= oberon_expr(ctx
);
3185 val
= oberon_make_temp_var_item(ctx
, expr
-> result
);
3186 oberon_assign(ctx
, expr
, val
);
3187 oberon_assert_token(ctx
, OF
);
3188 oberon_case(ctx
, val
, end
);
3189 while(ctx
-> token
== BAR
)
3191 oberon_assert_token(ctx
, BAR
);
3192 oberon_case(ctx
, val
, end
);
3195 if(ctx
-> token
== ELSE
)
3197 oberon_assert_token(ctx
, ELSE
);
3198 oberon_statement_seq(ctx
);
3202 oberon_generate_trap(ctx
, -1);
3205 oberon_generate_label(ctx
, end
);
3206 oberon_assert_token(ctx
, END
);
3210 oberon_with_guard_do(oberon_context_t
* ctx
, gen_label_t
* end
)
3212 oberon_expr_t
* val
;
3213 oberon_expr_t
* var
;
3214 oberon_expr_t
* type
;
3215 oberon_expr_t
* cond
;
3216 oberon_expr_t
* cast
;
3217 oberon_type_t
* old_type
;
3218 gen_var_t
* old_var
;
3219 gen_label_t
* this_end
;
3221 this_end
= oberon_generator_reserve_label(ctx
);
3223 var
= oberon_qualident_expr(ctx
);
3224 oberon_assert_token(ctx
, COLON
);
3225 type
= oberon_qualident_expr(ctx
);
3226 cond
= oberon_make_bin_op(ctx
, IS
, var
, type
);
3228 oberon_assert_token(ctx
, DO
);
3229 oberon_generate_branch(ctx
, cond
, false, this_end
);
3231 /* Сохраняем ссылку во временной переменной */
3232 val
= oberon_make_temp_var_item(ctx
, type
-> result
);
3233 //cast = oberno_make_record_cast(ctx, var, type -> result);
3234 cast
= oberon_cast_expr(ctx
, var
, type
-> result
);
3235 oberon_assign(ctx
, cast
, val
);
3236 /* Подменяем тип у оригинальной переменной */
3237 old_type
= var
-> item
.var
-> type
;
3238 var
-> item
.var
-> type
= type
-> result
;
3239 /* Подменяем ссылку на переменную */
3240 old_var
= var
-> item
.var
-> gen_var
;
3241 var
-> item
.var
-> gen_var
= val
-> item
.var
-> gen_var
;
3243 oberon_statement_seq(ctx
);
3244 oberon_generate_goto(ctx
, end
);
3245 oberon_generate_label(ctx
, this_end
);
3247 /* Возвращаем исходное состояние */
3248 var
-> item
.var
-> gen_var
= old_var
;
3249 var
-> item
.var
-> type
= old_type
;
3253 oberon_with_statement(oberon_context_t
* ctx
)
3256 end
= oberon_generator_reserve_label(ctx
);
3258 oberon_assert_token(ctx
, WITH
);
3259 oberon_with_guard_do(ctx
, end
);
3260 while(ctx
-> token
== BAR
)
3262 oberon_assert_token(ctx
, BAR
);
3263 oberon_with_guard_do(ctx
, end
);
3266 if(ctx
-> token
== ELSE
)
3268 oberon_assert_token(ctx
, ELSE
);
3269 oberon_statement_seq(ctx
);
3273 oberon_generate_trap(ctx
, -2);
3276 oberon_generate_label(ctx
, end
);
3277 oberon_assert_token(ctx
, END
);
3281 oberon_statement(oberon_context_t
* ctx
)
3283 oberon_expr_t
* item1
;
3284 oberon_expr_t
* item2
;
3286 if(ctx
-> token
== IDENT
)
3288 item1
= oberon_designator(ctx
);
3289 if(ctx
-> token
== ASSIGN
)
3291 oberon_assert_token(ctx
, ASSIGN
);
3292 item2
= oberon_expr(ctx
);
3293 oberon_assign(ctx
, item2
, item1
);
3297 oberon_opt_proc_parens(ctx
, item1
);
3300 else if(ctx
-> token
== IF
)
3304 oberon_expr_t
* cond
;
3306 els
= oberon_generator_reserve_label(ctx
);
3307 end
= oberon_generator_reserve_label(ctx
);
3309 oberon_assert_token(ctx
, IF
);
3310 cond
= oberon_expr(ctx
);
3311 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3313 oberon_error(ctx
, "condition must be boolean");
3315 oberon_assert_token(ctx
, THEN
);
3316 oberon_generate_branch(ctx
, cond
, false, els
);
3317 oberon_statement_seq(ctx
);
3318 oberon_generate_goto(ctx
, end
);
3319 oberon_generate_label(ctx
, els
);
3321 while(ctx
-> token
== ELSIF
)
3323 els
= oberon_generator_reserve_label(ctx
);
3325 oberon_assert_token(ctx
, ELSIF
);
3326 cond
= oberon_expr(ctx
);
3327 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3329 oberon_error(ctx
, "condition must be boolean");
3331 oberon_assert_token(ctx
, THEN
);
3332 oberon_generate_branch(ctx
, cond
, false, els
);
3333 oberon_statement_seq(ctx
);
3334 oberon_generate_goto(ctx
, end
);
3335 oberon_generate_label(ctx
, els
);
3338 if(ctx
-> token
== ELSE
)
3340 oberon_assert_token(ctx
, ELSE
);
3341 oberon_statement_seq(ctx
);
3344 oberon_generate_label(ctx
, end
);
3345 oberon_assert_token(ctx
, END
);
3347 else if(ctx
-> token
== WHILE
)
3349 gen_label_t
* begin
;
3351 oberon_expr_t
* cond
;
3353 begin
= oberon_generator_reserve_label(ctx
);
3354 end
= oberon_generator_reserve_label(ctx
);
3356 oberon_assert_token(ctx
, WHILE
);
3357 oberon_generate_label(ctx
, begin
);
3358 cond
= oberon_expr(ctx
);
3359 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3361 oberon_error(ctx
, "condition must be boolean");
3363 oberon_generate_branch(ctx
, cond
, false, end
);
3365 oberon_assert_token(ctx
, DO
);
3366 oberon_statement_seq(ctx
);
3367 oberon_generate_goto(ctx
, begin
);
3369 oberon_assert_token(ctx
, END
);
3370 oberon_generate_label(ctx
, end
);
3372 else if(ctx
-> token
== REPEAT
)
3374 gen_label_t
* begin
;
3375 oberon_expr_t
* cond
;
3377 begin
= oberon_generator_reserve_label(ctx
);
3378 oberon_generate_label(ctx
, begin
);
3379 oberon_assert_token(ctx
, REPEAT
);
3381 oberon_statement_seq(ctx
);
3383 oberon_assert_token(ctx
, UNTIL
);
3385 cond
= oberon_expr(ctx
);
3386 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3388 oberon_error(ctx
, "condition must be boolean");
3391 oberon_generate_branch(ctx
, cond
, true, begin
);
3393 else if(ctx
-> token
== FOR
)
3395 oberon_expr_t
* from
;
3396 oberon_expr_t
* index
;
3398 oberon_expr_t
* bound
;
3400 oberon_expr_t
* cond
;
3401 oberon_expr_t
* count
;
3402 gen_label_t
* begin
;
3407 begin
= oberon_generator_reserve_label(ctx
);
3408 end
= oberon_generator_reserve_label(ctx
);
3410 oberon_assert_token(ctx
, FOR
);
3411 iname
= oberon_assert_ident(ctx
);
3412 index
= oberon_ident_item(ctx
, iname
);
3413 oberon_assert_token(ctx
, ASSIGN
);
3414 from
= oberon_expr(ctx
);
3415 oberon_assert_token(ctx
, TO
);
3416 bound
= oberon_make_temp_var_item(ctx
, index
-> result
);
3417 to
= oberon_expr(ctx
);
3418 oberon_assign(ctx
, to
, bound
); // сначала temp
3419 oberon_assign(ctx
, from
, index
); // потом i
3420 if(ctx
-> token
== BY
)
3422 oberon_assert_token(ctx
, BY
);
3423 by
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3427 by
= oberon_make_integer(ctx
, 1);
3430 if(by
-> result
-> class != OBERON_TYPE_INTEGER
)
3432 oberon_error(ctx
, "must be integer");
3435 if(by
-> item
.integer
> 0)
3439 else if(by
-> item
.integer
< 0)
3445 oberon_error(ctx
, "zero step not allowed");
3448 oberon_assert_token(ctx
, DO
);
3449 oberon_generate_label(ctx
, begin
);
3450 cond
= oberon_make_bin_op(ctx
, op
, index
, bound
);
3451 oberon_generate_branch(ctx
, cond
, false, end
);
3452 oberon_statement_seq(ctx
);
3453 count
= oberon_make_bin_op(ctx
, PLUS
, index
, by
);
3454 oberon_assign(ctx
, count
, index
);
3455 oberon_generate_goto(ctx
, begin
);
3456 oberon_generate_label(ctx
, end
);
3457 oberon_assert_token(ctx
, END
);
3459 else if(ctx
-> token
== LOOP
)
3461 gen_label_t
* begin
;
3464 begin
= oberon_generator_reserve_label(ctx
);
3465 end
= oberon_generator_reserve_label(ctx
);
3467 oberon_open_scope(ctx
);
3468 oberon_assert_token(ctx
, LOOP
);
3469 oberon_generate_label(ctx
, begin
);
3470 ctx
-> decl
-> exit_label
= end
;
3471 oberon_statement_seq(ctx
);
3472 oberon_generate_goto(ctx
, begin
);
3473 oberon_generate_label(ctx
, end
);
3474 oberon_assert_token(ctx
, END
);
3475 oberon_close_scope(ctx
-> decl
);
3477 else if(ctx
-> token
== EXIT
)
3479 oberon_assert_token(ctx
, EXIT
);
3480 if(ctx
-> decl
-> exit_label
== NULL
)
3482 oberon_error(ctx
, "not in LOOP-END");
3484 oberon_generate_goto(ctx
, ctx
-> decl
-> exit_label
);
3486 else if(ctx
-> token
== CASE
)
3488 oberon_case_statement(ctx
);
3490 else if(ctx
-> token
== WITH
)
3492 oberon_with_statement(ctx
);
3494 else if(ctx
-> token
== RETURN
)
3496 oberon_assert_token(ctx
, RETURN
);
3497 if(ISEXPR(ctx
-> token
))
3499 oberon_expr_t
* expr
;
3500 expr
= oberon_expr(ctx
);
3501 oberon_make_return(ctx
, expr
);
3505 oberon_make_return(ctx
, NULL
);
3511 oberon_statement_seq(oberon_context_t
* ctx
)
3513 oberon_statement(ctx
);
3514 while(ctx
-> token
== SEMICOLON
)
3516 oberon_assert_token(ctx
, SEMICOLON
);
3517 oberon_statement(ctx
);
3522 oberon_import_module(oberon_context_t
* ctx
, char * alias
, char * name
)
3524 oberon_module_t
* m
= ctx
-> module_list
;
3525 while(m
&& strcmp(m
-> name
, name
) != 0)
3533 code
= ctx
-> import_module(name
);
3536 oberon_error(ctx
, "no such module");
3539 m
= oberon_compile_module(ctx
, code
);
3545 oberon_error(ctx
, "cyclic module import");
3548 oberon_object_t
* ident
;
3549 ident
= oberon_define_object(ctx
-> decl
, alias
, OBERON_CLASS_MODULE
, false, false, false);
3550 ident
-> module
= m
;
3554 oberon_import_decl(oberon_context_t
* ctx
)
3559 alias
= name
= oberon_assert_ident(ctx
);
3560 if(ctx
-> token
== ASSIGN
)
3562 oberon_assert_token(ctx
, ASSIGN
);
3563 name
= oberon_assert_ident(ctx
);
3566 oberon_import_module(ctx
, alias
, name
);
3570 oberon_import_list(oberon_context_t
* ctx
)
3572 oberon_assert_token(ctx
, IMPORT
);
3574 oberon_import_decl(ctx
);
3575 while(ctx
-> token
== COMMA
)
3577 oberon_assert_token(ctx
, COMMA
);
3578 oberon_import_decl(ctx
);
3581 oberon_assert_token(ctx
, SEMICOLON
);
3585 oberon_parse_module(oberon_context_t
* ctx
)
3589 oberon_read_token(ctx
);
3591 oberon_assert_token(ctx
, MODULE
);
3592 name1
= oberon_assert_ident(ctx
);
3593 oberon_assert_token(ctx
, SEMICOLON
);
3594 ctx
-> mod
-> name
= name1
;
3596 oberon_generator_init_module(ctx
, ctx
-> mod
);
3598 if(ctx
-> token
== IMPORT
)
3600 oberon_import_list(ctx
);
3603 oberon_decl_seq(ctx
);
3605 oberon_generate_begin_module(ctx
);
3606 if(ctx
-> token
== BEGIN
)
3608 oberon_assert_token(ctx
, BEGIN
);
3609 oberon_statement_seq(ctx
);
3611 oberon_generate_end_module(ctx
);
3613 oberon_assert_token(ctx
, END
);
3614 name2
= oberon_assert_ident(ctx
);
3615 oberon_expect_token(ctx
, DOT
);
3617 if(strcmp(name1
, name2
) != 0)
3619 oberon_error(ctx
, "module name not matched");
3622 oberon_generator_fini_module(ctx
-> mod
);
3625 // =======================================================================
3627 // =======================================================================
3629 static oberon_expr_t
*
3630 oberon_make_min_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3634 oberon_error(ctx
, "too few arguments");
3639 oberon_error(ctx
, "too mach arguments");
3642 oberon_expr_t
* arg
;
3645 if(!oberon_is_type_expr(arg
))
3647 oberon_error(ctx
, "MIN accept only type");
3650 oberon_expr_t
* expr
;
3651 int bits
= arg
-> result
-> size
* 8;
3652 switch(arg
-> result
-> class)
3654 case OBERON_TYPE_INTEGER
:
3655 expr
= oberon_make_integer(ctx
, -powl(2, bits
- 1));
3657 case OBERON_TYPE_BOOLEAN
:
3658 expr
= oberon_make_boolean(ctx
, false);
3660 case OBERON_TYPE_CHAR
:
3661 expr
= oberon_make_char(ctx
, 0);
3663 case OBERON_TYPE_REAL
:
3664 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (-FLT_MAX
) : (-DBL_MAX
), arg
-> result
);
3666 case OBERON_TYPE_SET
:
3667 expr
= oberon_make_integer(ctx
, 0);
3670 oberon_error(ctx
, "allowed only basic types");
3677 static oberon_expr_t
*
3678 oberon_make_max_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3682 oberon_error(ctx
, "too few arguments");
3687 oberon_error(ctx
, "too mach arguments");
3690 oberon_expr_t
* arg
;
3693 if(!oberon_is_type_expr(arg
))
3695 oberon_error(ctx
, "MAX accept only type");
3698 oberon_expr_t
* expr
;
3699 int bits
= arg
-> result
-> size
* 8;
3700 switch(arg
-> result
-> class)
3702 case OBERON_TYPE_INTEGER
:
3703 expr
= oberon_make_integer(ctx
, powl(2, bits
- 1) - 1);
3705 case OBERON_TYPE_BOOLEAN
:
3706 expr
= oberon_make_boolean(ctx
, true);
3708 case OBERON_TYPE_CHAR
:
3709 expr
= oberon_make_char(ctx
, powl(2, bits
) - 1);
3711 case OBERON_TYPE_REAL
:
3712 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (FLT_MAX
) : (DBL_MAX
), arg
-> result
);
3714 case OBERON_TYPE_SET
:
3715 expr
= oberon_make_integer(ctx
, bits
);
3718 oberon_error(ctx
, "allowed only basic types");
3725 static oberon_expr_t
*
3726 oberon_make_size_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3730 oberon_error(ctx
, "too few arguments");
3735 oberon_error(ctx
, "too mach arguments");
3738 oberon_expr_t
* arg
;
3740 if(!oberon_is_type_expr(arg
))
3742 oberon_error(ctx
, "SIZE accept only type");
3746 oberon_expr_t
* expr
;
3747 oberon_type_t
* type
= arg
-> result
;
3748 switch(type
-> class)
3750 case OBERON_TYPE_INTEGER
:
3751 case OBERON_TYPE_BOOLEAN
:
3752 case OBERON_TYPE_REAL
:
3753 case OBERON_TYPE_CHAR
:
3754 case OBERON_TYPE_SET
:
3755 size
= type
-> size
;
3758 oberon_error(ctx
, "TODO SIZE");
3762 expr
= oberon_make_integer(ctx
, size
);
3766 static oberon_expr_t
*
3767 oberon_make_abs_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3771 oberon_error(ctx
, "too few arguments");
3776 oberon_error(ctx
, "too mach arguments");
3779 oberon_expr_t
* arg
;
3781 oberon_check_src(ctx
, arg
);
3783 if(oberon_is_number_type(arg
-> result
))
3785 oberon_error(ctx
, "ABS accepts only numbers");
3788 oberon_expr_t
* expr
;
3789 if(oberon_is_const(arg
))
3791 if(oberon_is_real_type(arg
-> result
))
3793 double x
= arg
-> item
.real
;
3794 expr
= oberon_make_real(ctx
, fabsl(x
), arg
-> result
);
3798 int64_t x
= arg
-> item
.integer
;
3799 expr
= oberon_make_integer(ctx
, llabs(x
));
3804 expr
= oberon_new_operator(OP_ABS
, arg
-> result
, arg
, NULL
);
3810 oberon_make_inc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3814 oberon_error(ctx
, "too few arguments");
3819 oberon_error(ctx
, "too mach arguments");
3822 oberon_expr_t
* dst
;
3824 oberon_check_dst(ctx
, dst
);
3826 if(!oberon_is_integer_type(dst
-> result
))
3828 oberon_error(ctx
, "expect integer");
3831 oberon_expr_t
* expr
;
3832 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_make_integer(ctx
, 1));
3833 oberon_assign(ctx
, expr
, dst
);
3837 oberon_make_incl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3841 oberon_error(ctx
, "too few arguments");
3846 oberon_error(ctx
, "too mach arguments");
3849 oberon_expr_t
* dst
;
3851 oberon_check_dst(ctx
, dst
);
3853 if(!oberon_is_set_type(dst
-> result
))
3855 oberon_error(ctx
, "expect integer");
3859 x
= list_args
-> next
;
3860 oberon_check_src(ctx
, x
);
3862 if(!oberon_is_integer_type(x
-> result
))
3864 oberon_error(ctx
, "expect integer");
3867 oberon_expr_t
* expr
;
3868 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
3869 oberon_assign(ctx
, expr
, dst
);
3873 oberon_make_excl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3877 oberon_error(ctx
, "too few arguments");
3882 oberon_error(ctx
, "too mach arguments");
3885 oberon_expr_t
* dst
;
3887 oberon_check_dst(ctx
, dst
);
3889 if(!oberon_is_set_type(dst
-> result
))
3891 oberon_error(ctx
, "expect integer");
3895 x
= list_args
-> next
;
3896 oberon_check_src(ctx
, x
);
3898 if(!oberon_is_integer_type(x
-> result
))
3900 oberon_error(ctx
, "expect integer");
3903 oberon_expr_t
* expr
;
3904 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
3905 oberon_assign(ctx
, expr
, dst
);
3909 oberon_make_dec_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3913 oberon_error(ctx
, "too few arguments");
3918 oberon_error(ctx
, "too mach arguments");
3921 oberon_expr_t
* dst
;
3923 oberon_check_dst(ctx
, dst
);
3925 if(!oberon_is_integer_type(dst
-> result
))
3927 oberon_error(ctx
, "expect integer");
3930 oberon_expr_t
* expr
;
3931 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_make_integer(ctx
, 1));
3932 oberon_assign(ctx
, expr
, dst
);
3936 oberon_make_new_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3940 oberon_error(ctx
, "too few arguments");
3943 oberon_expr_t
* dst
;
3945 oberon_check_dst(ctx
, dst
);
3947 oberon_type_t
* type
;
3948 type
= dst
-> result
;
3950 if(type
-> class != OBERON_TYPE_POINTER
)
3952 oberon_error(ctx
, "not a pointer");
3955 type
= type
-> base
;
3957 oberon_expr_t
* src
;
3958 src
= oberon_new_item(MODE_NEW
, dst
-> result
, 0);
3959 src
-> item
.num_args
= 0;
3960 src
-> item
.args
= NULL
;
3963 if(type
-> class == OBERON_TYPE_ARRAY
)
3965 if(type
-> size
== 0)
3967 oberon_type_t
* x
= type
;
3968 while(x
-> class == OBERON_TYPE_ARRAY
)
3978 if(num_args
< max_args
)
3980 oberon_error(ctx
, "too few arguments");
3983 if(num_args
> max_args
)
3985 oberon_error(ctx
, "too mach arguments");
3988 int num_sizes
= max_args
- 1;
3989 oberon_expr_t
* size_list
= list_args
-> next
;
3991 oberon_expr_t
* arg
= size_list
;
3992 for(int i
= 0; i
< max_args
- 1; i
++)
3994 oberon_check_src(ctx
, arg
);
3995 if(arg
-> result
-> class != OBERON_TYPE_INTEGER
)
3997 oberon_error(ctx
, "size must be integer");
4002 src
-> item
.num_args
= num_sizes
;
4003 src
-> item
.args
= size_list
;
4005 else if(type
-> class != OBERON_TYPE_RECORD
)
4007 oberon_error(ctx
, "oberon_make_new_call: wat");
4010 if(num_args
> max_args
)
4012 oberon_error(ctx
, "too mach arguments");
4015 oberon_assign(ctx
, src
, dst
);
4019 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4023 oberon_error(ctx
, "too few arguments");
4028 oberon_error(ctx
, "too mach arguments");
4031 oberon_expr_t
* src
;
4033 oberon_check_src(ctx
, src
);
4035 oberon_expr_t
* dst
;
4036 dst
= list_args
-> next
;
4037 oberon_check_dst(ctx
, dst
);
4039 if(!oberon_is_string_type(src
-> result
) && !oberon_is_array_of_char_type(src
-> result
))
4041 oberon_error(ctx
, "source must be string or array of char");
4044 if(!oberon_is_array_of_char_type(dst
-> result
))
4046 oberon_error(ctx
, "dst must be array of char");
4049 oberon_generate_copy(ctx
, src
, dst
);
4053 oberon_make_assert_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4057 oberon_error(ctx
, "too few arguments");
4062 oberon_error(ctx
, "too mach arguments");
4065 oberon_expr_t
* cond
;
4067 oberon_check_src(ctx
, cond
);
4069 if(!oberon_is_boolean_type(cond
-> result
))
4071 oberon_error(ctx
, "expected boolean");
4076 oberon_generate_assert(ctx
, cond
);
4080 oberon_expr_t
* num
;
4081 num
= list_args
-> next
;
4082 oberon_check_src(ctx
, num
);
4084 if(!oberon_is_integer_type(num
-> result
))
4086 oberon_error(ctx
, "expected integer");
4089 oberon_check_const(ctx
, num
);
4091 oberon_generate_assert_n(ctx
, cond
, num
-> item
.integer
);
4096 oberon_make_halt_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4100 oberon_error(ctx
, "too few arguments");
4105 oberon_error(ctx
, "too mach arguments");
4108 oberon_expr_t
* num
;
4110 oberon_check_src(ctx
, num
);
4112 if(num
-> result
-> class != OBERON_TYPE_INTEGER
)
4114 oberon_error(ctx
, "expected integer");
4117 oberon_check_const(ctx
, num
);
4119 oberon_generate_halt(ctx
, num
-> item
.integer
);
4122 static oberon_expr_t
*
4123 oberon_make_ash_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4127 oberon_error(ctx
, "too few arguments");
4132 oberon_error(ctx
, "too mach arguments");
4135 oberon_expr_t
* arg1
;
4137 oberon_check_src(ctx
, arg1
);
4138 if(arg1
-> result
-> class != OBERON_TYPE_INTEGER
)
4140 oberon_error(ctx
, "expected integer");
4143 oberon_expr_t
* arg2
;
4144 arg2
= list_args
-> next
;
4145 oberon_check_src(ctx
, arg2
);
4146 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4148 oberon_error(ctx
, "expected integer");
4151 oberon_expr_t
* expr
;
4152 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4154 int64_t x
= arg1
-> item
.integer
;
4155 int64_t y
= arg2
-> item
.integer
;
4156 expr
= oberon_make_integer(ctx
, x
* powl(2, y
));
4160 expr
= oberon_new_operator(OP_ASH
, arg1
-> result
, arg1
, arg2
);
4166 static oberon_expr_t
*
4167 oberon_make_cap_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4171 oberon_error(ctx
, "too few arguments");
4176 oberon_error(ctx
, "too mach arguments");
4179 oberon_expr_t
* arg
;
4181 oberon_check_src(ctx
, arg
);
4183 if(!oberon_is_char_type(arg
-> result
))
4185 oberon_error(ctx
, "expected char");
4188 oberon_expr_t
* expr
;
4189 if(oberon_is_const(arg
))
4191 expr
= oberon_make_char(ctx
, toupper(arg
-> item
.integer
));
4195 expr
= oberon_new_operator(OP_CAP
, arg
-> result
, arg
, NULL
);
4201 static oberon_expr_t
*
4202 oberon_make_chr_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4206 oberon_error(ctx
, "too few arguments");
4211 oberon_error(ctx
, "too mach arguments");
4214 oberon_expr_t
* arg
;
4216 oberon_check_src(ctx
, arg
);
4218 if(!oberon_is_integer_type(arg
-> result
))
4220 oberon_error(ctx
, "expected integer");
4223 oberon_expr_t
* expr
;
4224 if(oberon_is_const(arg
))
4226 expr
= oberon_make_char(ctx
, arg
-> item
.integer
);
4230 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> char_type
);
4235 static oberon_expr_t
*
4236 oberon_make_ord_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4240 oberon_error(ctx
, "too few arguments");
4245 oberon_error(ctx
, "too mach arguments");
4248 oberon_expr_t
* arg
;
4250 oberon_check_src(ctx
, arg
);
4252 if(!oberon_is_char_type(arg
-> result
))
4254 oberon_error(ctx
, "expected char");
4257 oberon_expr_t
* expr
;
4258 if(oberon_is_const(arg
))
4260 expr
= oberon_make_integer(ctx
, arg
-> item
.integer
);
4264 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> int_type
);
4269 static oberon_expr_t
*
4270 oberon_make_entier_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4274 oberon_error(ctx
, "too few arguments");
4279 oberon_error(ctx
, "too mach arguments");
4282 oberon_expr_t
* arg
;
4284 oberon_check_src(ctx
, arg
);
4286 if(!oberon_is_real_type(arg
-> result
))
4288 oberon_error(ctx
, "expected real");
4291 oberon_expr_t
* expr
;
4292 if(oberon_is_const(arg
))
4294 expr
= oberon_make_integer(ctx
, floor(arg
-> item
.real
));
4298 expr
= oberon_new_operator(OP_ENTIER
, ctx
-> int_type
, arg
, NULL
);
4303 static oberon_expr_t
*
4304 oberon_make_odd_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4308 oberon_error(ctx
, "too few arguments");
4313 oberon_error(ctx
, "too mach arguments");
4316 oberon_expr_t
* arg
;
4318 oberon_check_src(ctx
, arg
);
4320 if(!oberon_is_integer_type(arg
-> result
))
4322 oberon_error(ctx
, "expected integer");
4325 oberon_expr_t
* expr
;
4326 expr
= oberon_make_bin_op(ctx
, MOD
, arg
, oberon_make_integer(ctx
, 2));
4327 expr
= oberon_make_bin_op(ctx
, EQUAL
, expr
, oberon_make_integer(ctx
, 1));
4331 static oberon_expr_t
*
4332 oberon_make_short_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4336 oberon_error(ctx
, "too few arguments");
4341 oberon_error(ctx
, "too mach arguments");
4344 oberon_expr_t
* arg
;
4346 oberon_check_src(ctx
, arg
);
4348 if(arg
-> result
-> shorter
== NULL
)
4350 oberon_error(ctx
, "already shorter");
4353 oberon_expr_t
* expr
;
4354 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> shorter
);
4358 static oberon_expr_t
*
4359 oberon_make_long_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4363 oberon_error(ctx
, "too few arguments");
4368 oberon_error(ctx
, "too mach arguments");
4371 oberon_expr_t
* arg
;
4373 oberon_check_src(ctx
, arg
);
4375 if(arg
-> result
-> longer
== NULL
)
4377 oberon_error(ctx
, "already longer");
4380 oberon_expr_t
* expr
;
4381 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> longer
);
4385 static oberon_expr_t
*
4386 oberon_make_len_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4390 oberon_error(ctx
, "too few arguments");
4395 oberon_error(ctx
, "too mach arguments");
4400 oberon_check_src(ctx
, v
);
4402 if(!oberon_is_array_type(v
-> result
))
4404 oberon_error(ctx
, "expected array");
4410 oberon_expr_t
* num
;
4411 num
= list_args
-> next
;
4412 oberon_check_src(ctx
, num
);
4414 if(!oberon_is_integer_type(num
-> result
))
4416 oberon_error(ctx
, "expected integer");
4418 oberon_check_const(ctx
, num
);
4420 n
= num
-> item
.integer
;
4424 oberon_type_t
* arr
= v
-> result
;
4425 while(arr
-> class == OBERON_TYPE_ARRAY
)
4431 if(n
< 0 || n
> dim
)
4433 oberon_error(ctx
, "not in range 0..%i", dim
- 1);
4436 assert(v
-> is_item
);
4438 oberon_expr_t
* expr
;
4439 expr
= oberon_new_item(MODE_LEN
, ctx
-> int_type
, true);
4440 expr
-> item
.parent
= (oberon_item_t
*) v
;
4441 expr
-> item
.integer
= n
;
4446 oberon_new_const(oberon_context_t
* ctx
, char * name
, oberon_expr_t
* expr
)
4448 oberon_object_t
* constant
;
4449 constant
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_CONST
, true, false, false);
4450 oberon_check_const(ctx
, expr
);
4451 constant
-> value
= (oberon_item_t
*) expr
;
4455 register_default_types(oberon_context_t
* ctx
)
4457 ctx
-> notype_type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
4458 oberon_generator_init_type(ctx
, ctx
-> notype_type
);
4460 ctx
-> nil_type
= oberon_new_type_ptr(OBERON_TYPE_NIL
);
4461 oberon_generator_init_type(ctx
, ctx
-> nil_type
);
4463 ctx
-> string_type
= oberon_new_type_string(1);
4464 oberon_generator_init_type(ctx
, ctx
-> string_type
);
4466 ctx
-> bool_type
= oberon_new_type_boolean();
4467 oberon_generator_init_type(ctx
, ctx
-> bool_type
);
4469 ctx
-> char_type
= oberon_new_type_char(1);
4470 oberon_generator_init_type(ctx
, ctx
-> char_type
);
4472 ctx
-> byte_type
= oberon_new_type_integer(1);
4473 oberon_generator_init_type(ctx
, ctx
-> byte_type
);
4475 ctx
-> shortint_type
= oberon_new_type_integer(2);
4476 oberon_generator_init_type(ctx
, ctx
-> shortint_type
);
4478 ctx
-> int_type
= oberon_new_type_integer(4);
4479 oberon_generator_init_type(ctx
, ctx
-> int_type
);
4481 ctx
-> longint_type
= oberon_new_type_integer(8);
4482 oberon_generator_init_type(ctx
, ctx
-> longint_type
);
4484 ctx
-> real_type
= oberon_new_type_real(4);
4485 oberon_generator_init_type(ctx
, ctx
-> real_type
);
4487 ctx
-> longreal_type
= oberon_new_type_real(8);
4488 oberon_generator_init_type(ctx
, ctx
-> longreal_type
);
4490 ctx
-> set_type
= oberon_new_type_set(4);
4491 oberon_generator_init_type(ctx
, ctx
-> set_type
);
4493 ctx
-> system_byte_type
= oberon_new_type_ptr(OBERON_TYPE_SYSTEM_BYTE
);
4494 oberon_generator_init_type(ctx
, ctx
-> system_byte_type
);
4496 /* LONG / SHORT support */
4497 ctx
-> byte_type
-> shorter
= NULL
;
4498 ctx
-> byte_type
-> longer
= ctx
-> shortint_type
;
4500 ctx
-> shortint_type
-> shorter
= ctx
-> byte_type
;
4501 ctx
-> shortint_type
-> longer
= ctx
-> int_type
;
4503 ctx
-> int_type
-> shorter
= ctx
-> shortint_type
;
4504 ctx
-> int_type
-> longer
= ctx
-> longint_type
;
4506 ctx
-> longint_type
-> shorter
= ctx
-> int_type
;
4507 ctx
-> longint_type
-> longer
= NULL
;
4509 ctx
-> real_type
-> shorter
= NULL
;
4510 ctx
-> real_type
-> longer
= ctx
-> longreal_type
;
4512 ctx
-> longreal_type
-> shorter
= ctx
-> real_type
;
4513 ctx
-> longreal_type
-> longer
= NULL
;
4517 oberon_new_intrinsic(oberon_context_t
* ctx
, char * name
, GenerateFuncCallback f
, GenerateProcCallback p
)
4519 oberon_object_t
* proc
;
4520 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, true, false, false);
4521 proc
-> type
= oberon_new_type_ptr(OBERON_TYPE_PROCEDURE
);
4522 proc
-> type
-> sysproc
= true;
4523 proc
-> type
-> genfunc
= f
;
4524 proc
-> type
-> genproc
= p
;
4527 static void oberon_new_intrinsic_type(oberon_context_t
* ctx
, char * name
, oberon_type_t
* type
)
4529 oberon_object_t
* id
;
4530 id
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, true, false, false);
4535 oberon_begin_intrinsic_module(oberon_context_t
* ctx
, char * name
, oberon_module_t
** m
)
4537 oberon_scope_t
* module_scope
;
4538 module_scope
= oberon_open_scope(ctx
);
4540 oberon_module_t
* module
;
4541 module
= GC_MALLOC(sizeof *module
);
4542 memset(module
, 0, sizeof *module
);
4543 module
-> name
= name
;
4544 module
-> intrinsic
= true;
4545 module
-> decl
= module_scope
;
4546 module
-> next
= ctx
-> module_list
;
4548 ctx
-> mod
= module
;
4549 ctx
-> module_list
= module
;
4555 oberon_end_intrinsic_module(oberon_context_t
* ctx
, oberon_module_t
* m
)
4557 oberon_close_scope(m
-> decl
);
4563 oberon_create_context(ModuleImportCallback import_module
)
4565 oberon_context_t
* ctx
= GC_MALLOC(sizeof *ctx
);
4566 memset(ctx
, 0, sizeof *ctx
);
4568 oberon_scope_t
* world_scope
;
4569 world_scope
= oberon_open_scope(ctx
);
4570 ctx
-> world_scope
= world_scope
;
4572 ctx
-> import_module
= import_module
;
4574 oberon_generator_init_context(ctx
);
4577 register_default_types(ctx
);
4580 oberon_new_const(ctx
, "TRUE", oberon_make_boolean(ctx
, true));
4581 oberon_new_const(ctx
, "FALSE", oberon_make_boolean(ctx
, false));
4584 oberon_new_intrinsic_type(ctx
, "BOOLEAN", ctx
-> bool_type
);
4585 oberon_new_intrinsic_type(ctx
, "CHAR", ctx
-> char_type
);
4586 oberon_new_intrinsic_type(ctx
, "SHORTINT", ctx
-> byte_type
);
4587 oberon_new_intrinsic_type(ctx
, "INTEGER", ctx
-> shortint_type
);
4588 oberon_new_intrinsic_type(ctx
, "LONGINT", ctx
-> int_type
);
4589 oberon_new_intrinsic_type(ctx
, "HUGEINT", ctx
-> longint_type
);
4590 oberon_new_intrinsic_type(ctx
, "REAL", ctx
-> real_type
);
4591 oberon_new_intrinsic_type(ctx
, "LONGREAL", ctx
-> longreal_type
);
4592 oberon_new_intrinsic_type(ctx
, "SET", ctx
-> set_type
);
4595 oberon_new_intrinsic(ctx
, "ABS", oberon_make_abs_call
, NULL
);
4596 oberon_new_intrinsic(ctx
, "ASH", oberon_make_ash_call
, NULL
);
4597 oberon_new_intrinsic(ctx
, "CAP", oberon_make_cap_call
, NULL
);
4598 oberon_new_intrinsic(ctx
, "CHR", oberon_make_chr_call
, NULL
);
4599 oberon_new_intrinsic(ctx
, "ENTIER", oberon_make_entier_call
, NULL
);
4600 oberon_new_intrinsic(ctx
, "LEN", oberon_make_len_call
, NULL
);
4601 oberon_new_intrinsic(ctx
, "LONG", oberon_make_long_call
, NULL
);
4602 oberon_new_intrinsic(ctx
, "MAX", oberon_make_max_call
, NULL
);
4603 oberon_new_intrinsic(ctx
, "MIN", oberon_make_min_call
, NULL
);
4604 oberon_new_intrinsic(ctx
, "ODD", oberon_make_odd_call
, NULL
);
4605 oberon_new_intrinsic(ctx
, "ORD", oberon_make_ord_call
, NULL
);
4606 oberon_new_intrinsic(ctx
, "SHORT", oberon_make_short_call
, NULL
);
4607 oberon_new_intrinsic(ctx
, "SIZE", oberon_make_size_call
, NULL
);
4610 oberon_new_intrinsic(ctx
, "ASSERT", NULL
, oberon_make_assert_call
);
4611 oberon_new_intrinsic(ctx
, "COPY", NULL
, oberon_make_copy_call
);
4612 oberon_new_intrinsic(ctx
, "DEC", NULL
, oberon_make_dec_call
);
4613 oberon_new_intrinsic(ctx
, "EXCL", NULL
, oberon_make_excl_call
);
4614 oberon_new_intrinsic(ctx
, "HALT", NULL
, oberon_make_halt_call
);
4615 oberon_new_intrinsic(ctx
, "INC", NULL
, oberon_make_inc_call
);
4616 oberon_new_intrinsic(ctx
, "INCL", NULL
, oberon_make_incl_call
);
4617 oberon_new_intrinsic(ctx
, "NEW", NULL
, oberon_make_new_call
);
4620 oberon_begin_intrinsic_module(ctx
, "SYSTEM", &ctx
-> system_module
);
4623 oberon_new_intrinsic_type(ctx
, "BYTE", ctx
-> system_byte_type
);
4625 oberon_end_intrinsic_module(ctx
, ctx
-> system_module
);
4631 oberon_destroy_context(oberon_context_t
* ctx
)
4633 oberon_generator_destroy_context(ctx
);
4637 oberon_compile_module(oberon_context_t
* ctx
, const char * newcode
)
4639 const char * code
= ctx
-> code
;
4640 int code_index
= ctx
-> code_index
;
4642 int token
= ctx
-> token
;
4643 char * string
= ctx
-> string
;
4644 int integer
= ctx
-> integer
;
4645 int real
= ctx
-> real
;
4646 bool longmode
= ctx
-> longmode
;
4647 oberon_scope_t
* decl
= ctx
-> decl
;
4648 oberon_module_t
* mod
= ctx
-> mod
;
4650 oberon_scope_t
* module_scope
;
4651 module_scope
= oberon_open_scope(ctx
);
4653 oberon_module_t
* module
;
4654 module
= GC_MALLOC(sizeof *module
);
4655 memset(module
, 0, sizeof *module
);
4656 module
-> decl
= module_scope
;
4657 module
-> next
= ctx
-> module_list
;
4659 ctx
-> mod
= module
;
4660 ctx
-> module_list
= module
;
4662 oberon_init_scaner(ctx
, newcode
);
4663 oberon_parse_module(ctx
);
4665 module
-> ready
= 1;
4668 ctx
-> code_index
= code_index
;
4670 ctx
-> token
= token
;
4671 ctx
-> string
= string
;
4672 ctx
-> integer
= integer
;
4674 ctx
-> longmode
= longmode
;