10 #include "../include/oberon.h"
12 #include "oberon-internals.h"
13 #include "oberon-type-compat.h"
14 #include "oberon-common.h"
15 #include "generator.h"
17 // =======================================================================
19 // =======================================================================
22 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
);
24 static oberon_type_t
*
25 oberon_new_type_ptr(int class)
27 oberon_type_t
* x
= malloc(sizeof *x
);
28 memset(x
, 0, sizeof *x
);
33 static oberon_type_t
*
34 oberon_new_type_integer(int size
)
37 x
= oberon_new_type_ptr(OBERON_TYPE_INTEGER
);
42 static oberon_type_t
*
43 oberon_new_type_boolean()
46 x
= oberon_new_type_ptr(OBERON_TYPE_BOOLEAN
);
50 static oberon_type_t
*
51 oberon_new_type_real(int size
)
54 x
= oberon_new_type_ptr(OBERON_TYPE_REAL
);
59 static oberon_type_t
*
60 oberon_new_type_char(int size
)
63 x
= oberon_new_type_ptr(OBERON_TYPE_CHAR
);
68 static oberon_type_t
*
69 oberon_new_type_string(int size
)
72 x
= oberon_new_type_ptr(OBERON_TYPE_STRING
);
77 static oberon_type_t
*
78 oberon_new_type_set(int size
)
81 x
= oberon_new_type_ptr(OBERON_TYPE_SET
);
86 static oberon_expr_t
*
87 oberon_new_operator(int op
, oberon_type_t
* result
, oberon_expr_t
* left
, oberon_expr_t
* right
)
89 oberon_oper_t
* operator;
90 operator = malloc(sizeof *operator);
91 memset(operator, 0, sizeof *operator);
93 operator -> is_item
= 0;
94 operator -> result
= result
;
95 operator -> read_only
= 1;
97 operator -> left
= left
;
98 operator -> right
= right
;
100 return (oberon_expr_t
*) operator;
103 static oberon_expr_t
*
104 oberon_new_item(int mode
, oberon_type_t
* result
, int read_only
)
106 oberon_item_t
* item
;
107 item
= malloc(sizeof *item
);
108 memset(item
, 0, sizeof *item
);
111 item
-> result
= result
;
112 item
-> read_only
= read_only
;
115 return (oberon_expr_t
*)item
;
118 static oberon_type_t
*
119 oberon_get_type_of_int_value(oberon_context_t
* ctx
, int64_t i
)
121 if(i
>= -128 && i
<= 127)
123 return ctx
-> byte_type
;
125 else if(i
>= -32768 && i
<= 32767)
127 return ctx
-> shortint_type
;
129 else if(i
>= -2147483648 && i
<= 2147483647)
131 return ctx
-> int_type
;
135 return ctx
-> longint_type
;
139 static oberon_expr_t
*
140 oberon_make_integer(oberon_context_t
* ctx
, int64_t i
)
142 oberon_expr_t
* expr
;
143 oberon_type_t
* result
;
144 result
= oberon_get_type_of_int_value(ctx
, i
);
145 expr
= oberon_new_item(MODE_INTEGER
, result
, true);
146 expr
-> item
.integer
= i
;
147 expr
-> item
.real
= i
;
151 static oberon_expr_t
*
152 oberon_make_real_typed(oberon_context_t
* ctx
, double r
, oberon_type_t
* result
)
154 oberon_expr_t
* expr
;
155 expr
= oberon_new_item(MODE_REAL
, result
, true);
156 expr
-> item
.integer
= r
;
157 expr
-> item
.real
= r
;
161 static oberon_expr_t
*
162 oberon_make_real(oberon_context_t
* ctx
, double r
, bool longmode
)
164 oberon_type_t
* result
;
165 result
= (longmode
) ? (ctx
-> longreal_type
) : (ctx
-> real_type
);
166 return oberon_make_real_typed(ctx
, r
, result
);
169 static oberon_expr_t
*
170 oberon_make_boolean(oberon_context_t
* ctx
, bool cond
)
172 oberon_expr_t
* expr
;
173 expr
= oberon_new_item(MODE_BOOLEAN
, ctx
-> bool_type
, true);
174 expr
-> item
.integer
= cond
;
175 expr
-> item
.real
= cond
;
179 static oberon_expr_t
*
180 oberon_make_set(oberon_context_t
* ctx
, int64_t i
)
182 oberon_expr_t
* expr
;
183 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
184 expr
-> item
.integer
= i
;
185 expr
-> item
.real
= i
;
189 static oberon_expr_t
*
190 oberon_make_set_range(oberon_context_t
* ctx
, int64_t x
, int64_t y
)
192 oberon_expr_t
* expr
;
193 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
194 expr
-> item
.integer
= (x
<= y
) ? ((2 << y
) - (1 << x
)) : (0);
195 expr
-> item
.real
= expr
-> item
.integer
;
199 // =======================================================================
201 // =======================================================================
203 static oberon_scope_t
*
204 oberon_open_scope(oberon_context_t
* ctx
)
206 oberon_scope_t
* scope
= calloc(1, sizeof *scope
);
207 oberon_object_t
* list
= calloc(1, sizeof *list
);
210 scope
-> list
= list
;
211 scope
-> up
= ctx
-> decl
;
215 scope
-> local
= scope
-> up
-> local
;
216 scope
-> parent
= scope
-> up
-> parent
;
217 scope
-> parent_type
= scope
-> up
-> parent_type
;
218 scope
-> exit_label
= scope
-> up
-> exit_label
;
226 oberon_close_scope(oberon_scope_t
* scope
)
228 oberon_context_t
* ctx
= scope
-> ctx
;
229 ctx
-> decl
= scope
-> up
;
232 static oberon_object_t
*
233 oberon_find_object_in_list(oberon_object_t
* list
, char * name
)
235 oberon_object_t
* x
= list
;
236 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
243 static oberon_object_t
*
244 oberon_find_object(oberon_scope_t
* scope
, char * name
, bool check_it
)
246 oberon_object_t
* result
= NULL
;
248 oberon_scope_t
* s
= scope
;
249 while(result
== NULL
&& s
!= NULL
)
251 result
= oberon_find_object_in_list(s
-> list
, name
);
255 if(check_it
&& result
== NULL
)
257 oberon_error(scope
-> ctx
, "undefined ident %s", name
);
263 static oberon_object_t
*
264 oberon_create_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
)
266 oberon_object_t
* newvar
= malloc(sizeof *newvar
);
267 memset(newvar
, 0, sizeof *newvar
);
268 newvar
-> name
= name
;
269 newvar
-> class = class;
270 newvar
-> export
= export
;
271 newvar
-> read_only
= read_only
;
272 newvar
-> local
= scope
-> local
;
273 newvar
-> parent
= scope
-> parent
;
274 newvar
-> parent_type
= scope
-> parent_type
;
275 newvar
-> module
= scope
-> ctx
-> mod
;
279 static oberon_object_t
*
280 oberon_define_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
, bool check_upscope
)
284 if(oberon_find_object(scope
-> up
, name
, false))
286 oberon_error(scope
-> ctx
, "already defined");
290 oberon_object_t
* x
= scope
-> list
;
291 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
298 oberon_error(scope
-> ctx
, "already defined");
301 oberon_object_t
* newvar
;
302 newvar
= oberon_create_object(scope
, name
, class, export
, read_only
);
308 static oberon_object_t
*
309 oberon_define_type(oberon_scope_t
* scope
, char * name
, oberon_type_t
* type
, int export
)
311 oberon_object_t
* id
;
312 id
= oberon_define_object(scope
, name
, OBERON_CLASS_TYPE
, export
, false, false);
314 oberon_generator_init_type(scope
-> ctx
, type
);
318 // =======================================================================
320 // =======================================================================
323 oberon_get_char(oberon_context_t
* ctx
)
325 if(ctx
-> code
[ctx
-> code_index
])
327 ctx
-> code_index
+= 1;
328 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
333 oberon_init_scaner(oberon_context_t
* ctx
, const char * code
)
336 ctx
-> code_index
= 0;
337 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
341 oberon_read_ident(oberon_context_t
* ctx
)
344 int i
= ctx
-> code_index
;
346 int c
= ctx
-> code
[i
];
354 char * ident
= malloc(len
+ 1);
355 memcpy(ident
, &ctx
->code
[ctx
->code_index
], len
);
358 ctx
-> code_index
= i
;
359 ctx
-> c
= ctx
-> code
[i
];
360 ctx
-> string
= ident
;
361 ctx
-> token
= IDENT
;
363 if(strcmp(ident
, "MODULE") == 0)
365 ctx
-> token
= MODULE
;
367 else if(strcmp(ident
, "END") == 0)
371 else if(strcmp(ident
, "VAR") == 0)
375 else if(strcmp(ident
, "BEGIN") == 0)
377 ctx
-> token
= BEGIN
;
379 else if(strcmp(ident
, "OR") == 0)
383 else if(strcmp(ident
, "DIV") == 0)
387 else if(strcmp(ident
, "MOD") == 0)
391 else if(strcmp(ident
, "PROCEDURE") == 0)
393 ctx
-> token
= PROCEDURE
;
395 else if(strcmp(ident
, "RETURN") == 0)
397 ctx
-> token
= RETURN
;
399 else if(strcmp(ident
, "CONST") == 0)
401 ctx
-> token
= CONST
;
403 else if(strcmp(ident
, "TYPE") == 0)
407 else if(strcmp(ident
, "ARRAY") == 0)
409 ctx
-> token
= ARRAY
;
411 else if(strcmp(ident
, "OF") == 0)
415 else if(strcmp(ident
, "RECORD") == 0)
417 ctx
-> token
= RECORD
;
419 else if(strcmp(ident
, "POINTER") == 0)
421 ctx
-> token
= POINTER
;
423 else if(strcmp(ident
, "TO") == 0)
427 else if(strcmp(ident
, "NIL") == 0)
431 else if(strcmp(ident
, "IMPORT") == 0)
433 ctx
-> token
= IMPORT
;
435 else if(strcmp(ident
, "IN") == 0)
439 else if(strcmp(ident
, "IS") == 0)
443 else if(strcmp(ident
, "IF") == 0)
447 else if(strcmp(ident
, "THEN") == 0)
451 else if(strcmp(ident
, "ELSE") == 0)
455 else if(strcmp(ident
, "ELSIF") == 0)
457 ctx
-> token
= ELSIF
;
459 else if(strcmp(ident
, "WHILE") == 0)
461 ctx
-> token
= WHILE
;
463 else if(strcmp(ident
, "DO") == 0)
467 else if(strcmp(ident
, "REPEAT") == 0)
469 ctx
-> token
= REPEAT
;
471 else if(strcmp(ident
, "UNTIL") == 0)
473 ctx
-> token
= UNTIL
;
475 else if(strcmp(ident
, "FOR") == 0)
479 else if(strcmp(ident
, "BY") == 0)
483 else if(strcmp(ident
, "LOOP") == 0)
487 else if(strcmp(ident
, "EXIT") == 0)
491 else if(strcmp(ident
, "CASE") == 0)
495 else if(strcmp(ident
, "WITH") == 0)
501 #define ISHEXDIGIT(x) \
502 (((x) >= '0' && (x) <= '9') || ((x) >= 'A' && (x) <= 'F'))
505 oberon_read_number(oberon_context_t
* ctx
)
518 * mode = 3 == LONGREAL
522 start_i
= ctx
-> code_index
;
524 while(isdigit(ctx
-> c
))
526 oberon_get_char(ctx
);
529 end_i
= ctx
-> code_index
;
531 if(ISHEXDIGIT(ctx
-> c
))
534 while(ISHEXDIGIT(ctx
-> c
))
536 oberon_get_char(ctx
);
539 end_i
= ctx
-> code_index
;
544 oberon_get_char(ctx
);
546 else if(ctx
-> c
== 'X')
549 oberon_get_char(ctx
);
553 oberon_error(ctx
, "invalid hex number");
556 else if(ctx
-> c
== '.')
558 oberon_get_char(ctx
);
561 /* Чит: избегаем конфликта с DOTDOT */
562 ctx
-> code_index
-= 1;
568 while(isdigit(ctx
-> c
))
570 oberon_get_char(ctx
);
573 if(ctx
-> c
== 'E' || ctx
-> c
== 'D')
575 exp_i
= ctx
-> code_index
;
582 oberon_get_char(ctx
);
584 if(ctx
-> c
== '+' || ctx
-> c
== '-')
586 oberon_get_char(ctx
);
589 while(isdigit(ctx
-> c
))
591 oberon_get_char(ctx
);
595 end_i
= ctx
-> code_index
;
603 oberon_get_char(ctx
);
605 else if(ctx
-> c
== 'X')
608 oberon_get_char(ctx
);
612 int len
= end_i
- start_i
;
613 ident
= malloc(len
+ 1);
614 memcpy(ident
, &ctx
-> code
[start_i
], len
);
617 ctx
-> longmode
= false;
620 int i
= exp_i
- start_i
;
622 ctx
-> longmode
= true;
628 integer
= atol(ident
);
630 ctx
-> token
= INTEGER
;
633 sscanf(ident
, "%lx", &integer
);
635 ctx
-> token
= INTEGER
;
639 sscanf(ident
, "%lf", &real
);
644 sscanf(ident
, "%lx", &integer
);
649 oberon_error(ctx
, "oberon_read_number: wat");
653 ctx
-> string
= ident
;
654 ctx
-> integer
= integer
;
659 oberon_skip_space(oberon_context_t
* ctx
)
661 while(isspace(ctx
-> c
))
663 oberon_get_char(ctx
);
668 oberon_read_comment(oberon_context_t
* ctx
)
675 oberon_get_char(ctx
);
678 oberon_get_char(ctx
);
682 else if(ctx
-> c
== '*')
684 oberon_get_char(ctx
);
687 oberon_get_char(ctx
);
691 else if(ctx
-> c
== 0)
693 oberon_error(ctx
, "unterminated comment");
697 oberon_get_char(ctx
);
702 static void oberon_read_string(oberon_context_t
* ctx
)
705 oberon_get_char(ctx
);
707 int start
= ctx
-> code_index
;
709 while(ctx
-> c
!= 0 && ctx
-> c
!= c
)
711 oberon_get_char(ctx
);
716 oberon_error(ctx
, "unterminated string");
719 int end
= ctx
-> code_index
;
721 oberon_get_char(ctx
);
723 char * string
= calloc(1, end
- start
+ 1);
724 strncpy(string
, &ctx
-> code
[start
], end
- start
);
726 ctx
-> token
= STRING
;
727 ctx
-> string
= string
;
728 ctx
-> integer
= string
[0];
731 static void oberon_read_token(oberon_context_t
* ctx
);
734 oberon_read_symbol(oberon_context_t
* ctx
)
743 ctx
-> token
= SEMICOLON
;
744 oberon_get_char(ctx
);
747 ctx
-> token
= COLON
;
748 oberon_get_char(ctx
);
751 ctx
-> token
= ASSIGN
;
752 oberon_get_char(ctx
);
757 oberon_get_char(ctx
);
760 ctx
-> token
= DOTDOT
;
761 oberon_get_char(ctx
);
765 ctx
-> token
= LPAREN
;
766 oberon_get_char(ctx
);
769 oberon_get_char(ctx
);
770 oberon_read_comment(ctx
);
771 oberon_read_token(ctx
);
775 ctx
-> token
= RPAREN
;
776 oberon_get_char(ctx
);
779 ctx
-> token
= EQUAL
;
780 oberon_get_char(ctx
);
784 oberon_get_char(ctx
);
788 oberon_get_char(ctx
);
792 oberon_get_char(ctx
);
796 ctx
-> token
= GREAT
;
797 oberon_get_char(ctx
);
801 oberon_get_char(ctx
);
806 oberon_get_char(ctx
);
809 ctx
-> token
= MINUS
;
810 oberon_get_char(ctx
);
814 oberon_get_char(ctx
);
817 oberon_get_char(ctx
);
818 oberon_error(ctx
, "unstarted comment");
822 ctx
-> token
= SLASH
;
823 oberon_get_char(ctx
);
827 oberon_get_char(ctx
);
831 oberon_get_char(ctx
);
834 ctx
-> token
= COMMA
;
835 oberon_get_char(ctx
);
838 ctx
-> token
= LBRACK
;
839 oberon_get_char(ctx
);
842 ctx
-> token
= RBRACK
;
843 oberon_get_char(ctx
);
846 ctx
-> token
= UPARROW
;
847 oberon_get_char(ctx
);
850 oberon_read_string(ctx
);
853 oberon_read_string(ctx
);
856 ctx
-> token
= LBRACE
;
857 oberon_get_char(ctx
);
860 ctx
-> token
= RBRACE
;
861 oberon_get_char(ctx
);
865 oberon_get_char(ctx
);
868 oberon_error(ctx
, "invalid char %c", ctx
-> c
);
874 oberon_read_token(oberon_context_t
* ctx
)
876 oberon_skip_space(ctx
);
881 oberon_read_ident(ctx
);
885 oberon_read_number(ctx
);
889 oberon_read_symbol(ctx
);
893 // =======================================================================
895 // =======================================================================
897 static void oberon_expect_token(oberon_context_t
* ctx
, int token
);
898 static oberon_expr_t
* oberon_expr(oberon_context_t
* ctx
);
899 static void oberon_assert_token(oberon_context_t
* ctx
, int token
);
900 static char * oberon_assert_ident(oberon_context_t
* ctx
);
901 static void oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
);
902 static oberon_item_t
* oberon_const_expr(oberon_context_t
* ctx
);
903 static oberon_expr_t
* oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
);
904 static bool oberon_is_const(oberon_expr_t
* expr
);
906 static oberon_expr_t
*
907 oberon_make_unary_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
)
909 oberon_expr_t
* expr
;
910 oberon_type_t
* result
;
912 result
= a
-> result
;
916 if(result
-> class == OBERON_TYPE_SET
)
918 if(oberon_is_const(a
))
920 expr
= oberon_make_set(ctx
, ~(a
-> item
.integer
));
924 expr
= oberon_new_operator(OP_COMPLEMENTATION
, result
, a
, NULL
);
927 else if(result
-> class == OBERON_TYPE_INTEGER
)
929 if(oberon_is_const(a
))
931 expr
= oberon_make_integer(ctx
, -(a
-> item
.integer
));
935 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
938 else if(result
-> class == OBERON_TYPE_REAL
)
940 if(oberon_is_const(a
))
942 expr
= oberon_make_real_typed(ctx
, -(a
-> item
.real
), result
);
946 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
951 oberon_error(ctx
, "incompatible operator type");
954 else if(token
== NOT
)
956 if(result
-> class != OBERON_TYPE_BOOLEAN
)
958 oberon_error(ctx
, "incompatible operator type");
961 if(oberon_is_const(a
))
963 expr
= oberon_make_boolean(ctx
, !(a
-> item
.integer
));
967 expr
= oberon_new_operator(OP_LOGIC_NOT
, result
, a
, NULL
);
972 oberon_error(ctx
, "oberon_make_unary_op: wat");
979 oberon_expr_list(oberon_context_t
* ctx
, int * num_expr
, oberon_expr_t
** first
, int const_expr
)
981 oberon_expr_t
* last
;
986 *first
= last
= (oberon_expr_t
*) oberon_const_expr(ctx
);
990 *first
= last
= oberon_expr(ctx
);
992 while(ctx
-> token
== COMMA
)
994 oberon_assert_token(ctx
, COMMA
);
995 oberon_expr_t
* current
;
999 current
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1003 current
= oberon_expr(ctx
);
1006 last
-> next
= current
;
1012 static oberon_expr_t
*
1013 oberon_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1015 oberon_expr_t
* cast
;
1017 if((oberon_is_char_type(pref
) && oberon_is_const_string(expr
) && strlen(expr
-> item
.string
) == 1))
1019 /* Автоматически преобразуем строку единичного размера в символ */
1020 cast
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
1021 cast
-> item
.integer
= expr
-> item
.string
[0];
1025 cast
= oberon_new_operator(OP_CAST
, pref
, expr
, NULL
);
1032 oberon_check_dst(oberon_context_t
* ctx
, oberon_expr_t
* dst
)
1034 if(dst
-> read_only
)
1036 oberon_error(ctx
, "read-only destination");
1039 if(dst
-> is_item
== false)
1041 oberon_error(ctx
, "not variable");
1044 switch(dst
-> item
.mode
)
1055 oberon_error(ctx
, "not variable");
1061 oberon_check_src(oberon_context_t
* ctx
, oberon_expr_t
* src
)
1065 if(src
-> item
.mode
== MODE_TYPE
)
1067 oberon_error(ctx
, "not variable");
1073 oberon_autocast_call(oberon_context_t
* ctx
, oberon_item_t
* desig
)
1075 if(desig
-> mode
!= MODE_CALL
)
1077 oberon_error(ctx
, "expected mode CALL");
1080 oberon_type_t
* fn
= desig
-> parent
-> result
;
1081 int num_args
= desig
-> num_args
;
1082 int num_decl
= fn
-> num_decl
;
1084 if(num_args
< num_decl
)
1086 oberon_error(ctx
, "too few arguments");
1088 else if(num_args
> num_decl
)
1090 oberon_error(ctx
, "too many arguments");
1093 /* Делаем проверку на запись и делаем автокаст */
1094 oberon_expr_t
* casted
[num_args
];
1095 oberon_expr_t
* arg
= desig
-> args
;
1096 oberon_object_t
* param
= fn
-> decl
;
1097 for(int i
= 0; i
< num_args
; i
++)
1099 if(param
-> class == OBERON_CLASS_VAR_PARAM
)
1101 oberon_check_dst(ctx
, arg
);
1102 if(!oberon_is_compatible_arrays(param
, arg
))
1104 oberon_check_compatible_var_param(ctx
, param
-> type
, arg
-> result
);
1106 casted
[i
] = oberon_cast_expr(ctx
, arg
, param
-> type
);
1110 oberon_check_src(ctx
, arg
);
1111 if(!oberon_is_compatible_arrays(param
, arg
))
1113 oberon_check_assignment_compatible(ctx
, arg
, param
-> type
);
1115 casted
[i
] = oberon_cast_expr(ctx
, arg
, param
-> type
);
1119 param
= param
-> next
;
1122 /* Создаём новый список выражений */
1126 for(int i
= 0; i
< num_args
- 1; i
++)
1128 casted
[i
] -> next
= casted
[i
+ 1];
1130 desig
-> args
= arg
;
1134 static oberon_expr_t
*
1135 oberon_make_call_func(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1137 oberon_type_t
* signature
= item
-> result
;
1138 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1140 oberon_error(ctx
, "not a procedure");
1143 oberon_expr_t
* call
;
1145 if(signature
-> sysproc
)
1147 if(signature
-> genfunc
== NULL
)
1149 oberon_error(ctx
, "not a function-procedure");
1152 call
= signature
-> genfunc(ctx
, num_args
, list_args
);
1156 if(signature
-> base
-> class == OBERON_TYPE_NOTYPE
)
1158 oberon_error(ctx
, "attempt to call procedure in expression");
1161 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1162 call
-> item
.parent
= item
;
1163 call
-> item
.num_args
= num_args
;
1164 call
-> item
.args
= list_args
;
1165 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1172 oberon_make_call_proc(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1174 oberon_type_t
* signature
= item
-> result
;
1175 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1177 oberon_error(ctx
, "not a procedure");
1180 oberon_expr_t
* call
;
1182 if(signature
-> sysproc
)
1184 if(signature
-> genproc
== NULL
)
1186 oberon_error(ctx
, "not a procedure");
1189 signature
-> genproc(ctx
, num_args
, list_args
);
1193 if(signature
-> base
-> class != OBERON_TYPE_NOTYPE
)
1195 oberon_error(ctx
, "attempt to call function as non-typed procedure");
1198 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1199 call
-> item
.parent
= item
;
1200 call
-> item
.num_args
= num_args
;
1201 call
-> item
.args
= list_args
;
1202 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1203 oberon_generate_call_proc(ctx
, call
);
1211 || ((x) == INTEGER) \
1214 || ((x) == STRING) \
1216 || ((x) == LPAREN) \
1219 static oberon_expr_t
*
1220 oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1222 if(expr
-> result
-> class != OBERON_TYPE_POINTER
)
1224 oberon_error(ctx
, "not a pointer");
1227 assert(expr
-> is_item
);
1229 oberon_expr_t
* selector
;
1230 selector
= oberon_new_item(MODE_DEREF
, expr
-> result
-> base
, expr
-> read_only
);
1231 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1236 static oberon_expr_t
*
1237 oberon_make_array_selector(oberon_context_t
* ctx
, oberon_expr_t
* desig
, oberon_expr_t
* index
)
1239 if(desig
-> result
-> class == OBERON_TYPE_POINTER
)
1241 desig
= oberno_make_dereferencing(ctx
, desig
);
1244 assert(desig
-> is_item
);
1246 if(desig
-> result
-> class != OBERON_TYPE_ARRAY
)
1248 oberon_error(ctx
, "not array");
1251 oberon_type_t
* base
;
1252 base
= desig
-> result
-> base
;
1254 if(index
-> result
-> class != OBERON_TYPE_INTEGER
)
1256 oberon_error(ctx
, "index must be integer");
1259 // Статическая проверка границ массива
1260 if(desig
-> result
-> size
!= 0)
1262 if(index
-> is_item
)
1264 if(index
-> item
.mode
== MODE_INTEGER
)
1266 int arr_size
= desig
-> result
-> size
;
1267 int index_int
= index
-> item
.integer
;
1268 if(index_int
< 0 || index_int
> arr_size
- 1)
1270 oberon_error(ctx
, "not in range (dimension size 0..%i)", arr_size
- 1);
1276 oberon_expr_t
* selector
;
1277 selector
= oberon_new_item(MODE_INDEX
, base
, desig
-> read_only
);
1278 selector
-> item
.parent
= (oberon_item_t
*) desig
;
1279 selector
-> item
.num_args
= 1;
1280 selector
-> item
.args
= index
;
1285 static oberon_expr_t
*
1286 oberon_make_record_selector(oberon_context_t
* ctx
, oberon_expr_t
* expr
, char * name
)
1288 if(expr
-> result
-> class == OBERON_TYPE_POINTER
)
1290 expr
= oberno_make_dereferencing(ctx
, expr
);
1293 assert(expr
-> is_item
);
1295 if(expr
-> result
-> class != OBERON_TYPE_RECORD
)
1297 oberon_error(ctx
, "not record");
1300 oberon_type_t
* rec
= expr
-> result
;
1302 oberon_object_t
* field
;
1303 field
= oberon_find_object(rec
-> scope
, name
, true);
1305 if(field
-> export
== 0)
1307 if(field
-> module
!= ctx
-> mod
)
1309 oberon_error(ctx
, "field not exported");
1313 int read_only
= expr
-> read_only
;
1314 if(field
-> read_only
)
1316 if(field
-> module
!= ctx
-> mod
)
1322 oberon_expr_t
* selector
;
1323 selector
= oberon_new_item(MODE_FIELD
, field
-> type
, read_only
);
1324 selector
-> item
.var
= field
;
1325 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1330 #define ISSELECTOR(x) \
1333 || ((x) == UPARROW) \
1336 static oberon_object_t
*
1337 oberon_qualident(oberon_context_t
* ctx
, char ** xname
, int check
)
1340 oberon_object_t
* x
;
1342 name
= oberon_assert_ident(ctx
);
1343 x
= oberon_find_object(ctx
-> decl
, name
, check
);
1347 if(x
-> class == OBERON_CLASS_MODULE
)
1349 oberon_assert_token(ctx
, DOT
);
1350 name
= oberon_assert_ident(ctx
);
1351 /* Наличие объектов в левых модулях всегда проверяется */
1352 x
= oberon_find_object(x
-> module
-> decl
, name
, 1);
1354 if(x
-> export
== 0)
1356 oberon_error(ctx
, "not exported");
1369 static oberon_expr_t
*
1370 oberon_ident_item(oberon_context_t
* ctx
, char * name
)
1373 oberon_object_t
* x
;
1374 oberon_expr_t
* expr
;
1376 x
= oberon_find_object(ctx
-> decl
, name
, true);
1379 if(x
-> class == OBERON_CLASS_CONST
|| x
-> class == OBERON_CLASS_PROC
)
1384 expr
= oberon_new_item(MODE_VAR
, x
-> type
, read_only
);
1385 expr
-> item
.var
= x
;
1389 static oberon_expr_t
*
1390 oberon_qualident_expr(oberon_context_t
* ctx
)
1392 oberon_object_t
* var
;
1393 oberon_expr_t
* expr
;
1395 var
= oberon_qualident(ctx
, NULL
, 1);
1398 if(var
-> read_only
)
1400 if(var
-> module
!= ctx
-> mod
)
1406 switch(var
-> class)
1408 case OBERON_CLASS_CONST
:
1410 expr
= (oberon_expr_t
*) var
-> value
;
1412 case OBERON_CLASS_TYPE
:
1413 expr
= oberon_new_item(MODE_TYPE
, var
-> type
, read_only
);
1415 case OBERON_CLASS_VAR
:
1416 case OBERON_CLASS_VAR_PARAM
:
1417 case OBERON_CLASS_PARAM
:
1418 expr
= oberon_new_item(MODE_VAR
, var
-> type
, read_only
);
1420 case OBERON_CLASS_PROC
:
1421 expr
= oberon_new_item(MODE_VAR
, var
-> type
, true);
1424 oberon_error(ctx
, "invalid designator");
1428 expr
-> item
.var
= var
;
1433 static oberon_expr_t
*
1434 oberon_designator(oberon_context_t
* ctx
)
1437 oberon_expr_t
* expr
;
1438 oberon_object_t
* objtype
;
1440 expr
= oberon_qualident_expr(ctx
);
1442 while(expr
-> result
-> class != OBERON_TYPE_PROCEDURE
&& ISSELECTOR(ctx
-> token
))
1444 switch(ctx
-> token
)
1447 oberon_assert_token(ctx
, DOT
);
1448 name
= oberon_assert_ident(ctx
);
1449 expr
= oberon_make_record_selector(ctx
, expr
, name
);
1452 oberon_assert_token(ctx
, LBRACK
);
1453 int num_indexes
= 0;
1454 oberon_expr_t
* indexes
= NULL
;
1455 oberon_expr_list(ctx
, &num_indexes
, &indexes
, 0);
1456 oberon_assert_token(ctx
, RBRACK
);
1458 for(int i
= 0; i
< num_indexes
; i
++)
1460 expr
= oberon_make_array_selector(ctx
, expr
, indexes
);
1461 indexes
= indexes
-> next
;
1465 oberon_assert_token(ctx
, UPARROW
);
1466 expr
= oberno_make_dereferencing(ctx
, expr
);
1469 oberon_assert_token(ctx
, LPAREN
);
1470 objtype
= oberon_qualident(ctx
, NULL
, true);
1471 oberon_assert_token(ctx
, RPAREN
);
1472 oberon_check_extension_of(ctx
, expr
-> result
, objtype
-> type
);
1473 expr
= oberon_cast_expr(ctx
, expr
, objtype
-> type
);
1476 oberon_error(ctx
, "oberon_designator: wat");
1484 static oberon_expr_t
*
1485 oberon_opt_func_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1487 /* Если есть скобки - значит вызов. Если нет, то передаём указатель. */
1488 if(ctx
-> token
== LPAREN
)
1490 oberon_assert_token(ctx
, LPAREN
);
1493 oberon_expr_t
* arguments
= NULL
;
1495 if(ISEXPR(ctx
-> token
))
1497 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1500 assert(expr
-> is_item
== 1);
1501 expr
= oberon_make_call_func(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1503 oberon_assert_token(ctx
, RPAREN
);
1510 oberon_opt_proc_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1512 assert(expr
-> is_item
);
1515 oberon_expr_t
* arguments
= NULL
;
1517 if(ctx
-> token
== LPAREN
)
1519 oberon_assert_token(ctx
, LPAREN
);
1521 if(ISEXPR(ctx
-> token
))
1523 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1526 oberon_assert_token(ctx
, RPAREN
);
1529 /* Вызов происходит даже без скобок */
1530 oberon_make_call_proc(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1533 static oberon_expr_t
*
1534 oberon_element(oberon_context_t
* ctx
)
1539 e1
= oberon_expr(ctx
);
1540 oberon_check_src(ctx
, e1
);
1541 if(e1
-> result
-> class != OBERON_TYPE_INTEGER
)
1543 oberon_error(ctx
, "expected integer");
1547 if(ctx
-> token
== DOTDOT
)
1549 oberon_assert_token(ctx
, DOTDOT
);
1550 e2
= oberon_expr(ctx
);
1551 oberon_check_src(ctx
, e2
);
1552 if(e2
-> result
-> class != OBERON_TYPE_INTEGER
)
1554 oberon_error(ctx
, "expected integer");
1558 oberon_expr_t
* set
;
1559 if(e2
== NULL
&& oberon_is_const(e1
))
1561 set
= oberon_make_set(ctx
, e1
-> item
.integer
);
1563 else if(e2
!= NULL
&& oberon_is_const(e1
) && oberon_is_const(e2
))
1565 set
= oberon_make_set_range(ctx
, e1
-> item
.integer
, e2
-> item
.integer
);
1569 set
= oberon_new_operator(OP_RANGE
, ctx
-> set_type
, e1
, e2
);
1574 static oberon_expr_t
*
1575 oberon_make_set_union(oberon_context_t
* ctx
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1577 if(oberon_is_const(a
) && oberon_is_const(b
))
1579 return oberon_make_set(ctx
, (a
-> item
.integer
| b
-> item
.integer
));
1583 return oberon_new_operator(OP_UNION
, ctx
-> set_type
, a
, b
);
1587 static oberon_expr_t
*
1588 oberon_set(oberon_context_t
* ctx
)
1590 oberon_expr_t
* set
;
1591 oberon_expr_t
* elements
;
1592 set
= oberon_make_set(ctx
, 0);
1594 oberon_assert_token(ctx
, LBRACE
);
1595 if(ISEXPR(ctx
-> token
))
1597 elements
= oberon_element(ctx
);
1598 set
= oberon_make_set_union(ctx
, set
, elements
);
1599 while(ctx
-> token
== COMMA
)
1601 oberon_assert_token(ctx
, COMMA
);
1602 elements
= oberon_element(ctx
);
1603 set
= oberon_make_set_union(ctx
, set
, elements
);
1606 oberon_assert_token(ctx
, RBRACE
);
1611 static oberon_expr_t
*
1612 oberon_factor(oberon_context_t
* ctx
)
1614 oberon_expr_t
* expr
;
1615 oberon_type_t
* result
;
1617 switch(ctx
-> token
)
1620 expr
= oberon_designator(ctx
);
1621 expr
= oberon_opt_func_parens(ctx
, expr
);
1624 expr
= oberon_make_integer(ctx
, ctx
-> integer
);
1625 oberon_assert_token(ctx
, INTEGER
);
1628 result
= ctx
-> char_type
;
1629 expr
= oberon_new_item(MODE_CHAR
, result
, true);
1630 expr
-> item
.integer
= ctx
-> integer
;
1631 oberon_assert_token(ctx
, CHAR
);
1634 result
= ctx
-> string_type
;
1635 expr
= oberon_new_item(MODE_STRING
, result
, true);
1636 expr
-> item
.string
= ctx
-> string
;
1637 oberon_assert_token(ctx
, STRING
);
1640 expr
= oberon_make_real(ctx
, ctx
-> real
, ctx
-> longmode
);
1641 oberon_assert_token(ctx
, REAL
);
1644 expr
= oberon_set(ctx
);
1647 oberon_assert_token(ctx
, LPAREN
);
1648 expr
= oberon_expr(ctx
);
1649 oberon_assert_token(ctx
, RPAREN
);
1652 oberon_assert_token(ctx
, NOT
);
1653 expr
= oberon_factor(ctx
);
1654 expr
= oberon_make_unary_op(ctx
, NOT
, expr
);
1657 oberon_assert_token(ctx
, NIL
);
1658 expr
= oberon_new_item(MODE_NIL
, ctx
-> nil_type
, true);
1661 oberon_error(ctx
, "invalid expression");
1667 static oberon_expr_t
*
1668 oberon_make_bin_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1670 oberon_expr_t
* expr
;
1671 oberon_type_t
* result
;
1673 oberon_check_compatible_bin_expr_types(ctx
, token
, a
-> result
, b
-> result
);
1674 oberon_check_src(ctx
, a
);
1677 oberon_check_src(ctx
, b
);
1682 if(oberon_is_const(a
) && oberon_is_const(b
))
1684 expr
= oberon_make_boolean(ctx
, (1 << a
-> item
.integer
) & b
-> item
.integer
);
1688 expr
= oberon_new_operator(OP_IN
, ctx
-> bool_type
, a
, b
);
1691 else if(token
== IS
)
1693 oberon_check_type_expr(ctx
, b
);
1694 expr
= oberon_new_operator(OP_IS
, ctx
-> bool_type
, a
, b
);
1696 else if((token
>= EQUAL
&& token
<= GEQ
) || token
== OR
|| token
== AND
)
1698 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1700 if(oberon_is_const(a
) && oberon_is_const(b
)
1701 && (oberon_is_real_type(result
) || oberon_is_integer_type(result
)))
1703 if(oberon_is_real_type(result
))
1705 double x
= a
-> item
.real
;
1706 double y
= b
-> item
.real
;
1709 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1710 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1711 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1712 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1713 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1714 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1715 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1716 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1717 default: assert(0); break;
1720 else if(oberon_is_integer_type(result
))
1722 int64_t x
= a
-> item
.integer
;
1723 int64_t y
= b
-> item
.integer
;
1726 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1727 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1728 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1729 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1730 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1731 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1732 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1733 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1734 default: assert(0); break;
1744 a
= oberon_cast_expr(ctx
, a
, result
);
1745 b
= oberon_cast_expr(ctx
, b
, result
);
1746 result
= ctx
-> bool_type
;
1749 case EQUAL
: expr
= oberon_new_operator(OP_EQ
, result
, a
, b
); break;
1750 case NEQ
: expr
= oberon_new_operator(OP_NEQ
, result
, a
, b
); break;
1751 case LESS
: expr
= oberon_new_operator(OP_LSS
, result
, a
, b
); break;
1752 case LEQ
: expr
= oberon_new_operator(OP_LEQ
, result
, a
, b
); break;
1753 case GREAT
: expr
= oberon_new_operator(OP_GRT
, result
, a
, b
); break;
1754 case GEQ
: expr
= oberon_new_operator(OP_GEQ
, result
, a
, b
); break;
1755 case OR
: expr
= oberon_new_operator(OP_LOGIC_OR
, result
, a
, b
); break;
1756 case AND
: expr
= oberon_new_operator(OP_LOGIC_AND
, result
, a
, b
); break;
1757 default: assert(0); break;
1761 else if(token
== SLASH
)
1763 if(oberon_is_set_type(a
-> result
) && oberon_is_set_type(b
-> result
))
1765 if(oberon_is_const(a
) && oberon_is_const(b
))
1767 int64_t x
= a
-> item
.integer
;
1768 int64_t y
= b
-> item
.integer
;
1769 expr
= oberon_make_set(ctx
, x
^ y
);
1773 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1774 a
= oberon_cast_expr(ctx
, a
, result
);
1775 b
= oberon_cast_expr(ctx
, b
, result
);
1776 expr
= oberon_new_operator(OP_SYM_DIFFERENCE
, result
, a
, b
);
1781 result
= oberon_get_longer_real_type(ctx
, a
-> result
, b
-> result
);
1782 if(oberon_is_const(a
) && oberon_is_const(b
))
1784 double x
= a
-> item
.real
;
1785 double y
= b
-> item
.real
;
1786 expr
= oberon_make_real_typed(ctx
, x
/ y
, result
);
1790 a
= oberon_cast_expr(ctx
, a
, result
);
1791 b
= oberon_cast_expr(ctx
, b
, result
);
1792 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
1798 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1800 if(oberon_is_const(a
) && oberon_is_const(b
))
1802 if(oberon_is_set_type(result
))
1804 int64_t x
= a
-> item
.integer
;
1805 int64_t y
= b
-> item
.integer
;
1808 case PLUS
: expr
= oberon_make_set(ctx
, x
| y
); break;
1809 case MINUS
: expr
= oberon_make_set(ctx
, x
& ~y
); break;
1810 case STAR
: expr
= oberon_make_set(ctx
, x
& y
); break;
1811 default: assert(0); break;
1814 if(oberon_is_real_type(result
))
1816 double x
= a
-> item
.real
;
1817 double y
= b
-> item
.real
;
1820 case PLUS
: expr
= oberon_make_real_typed(ctx
, x
+ y
, result
); break;
1821 case MINUS
: expr
= oberon_make_real_typed(ctx
, x
- y
, result
); break;
1822 case STAR
: expr
= oberon_make_real_typed(ctx
, x
* y
, result
); break;
1823 default: assert(0); break;
1826 else if(oberon_is_integer_type(result
))
1828 int64_t x
= a
-> item
.integer
;
1829 int64_t y
= b
-> item
.integer
;
1832 case PLUS
: expr
= oberon_make_integer(ctx
, x
+ y
); break;
1833 case MINUS
: expr
= oberon_make_integer(ctx
, x
- y
); break;
1834 case STAR
: expr
= oberon_make_integer(ctx
, x
* y
); break;
1835 case DIV
: expr
= oberon_make_integer(ctx
, x
/ y
); break;
1836 case MOD
: expr
= oberon_make_integer(ctx
, x
% y
); break;
1837 default: assert(0); break;
1847 a
= oberon_cast_expr(ctx
, a
, result
);
1848 b
= oberon_cast_expr(ctx
, b
, result
);
1851 if(oberon_is_set_type(result
))
1856 expr
= oberon_new_operator(OP_UNION
, result
, a
, b
);
1859 expr
= oberon_new_operator(OP_DIFFERENCE
, result
, a
, b
);
1862 expr
= oberon_new_operator(OP_INTERSECTION
, result
, a
, b
);
1869 else if(oberon_is_number_type(result
))
1874 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
1877 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
1880 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
1897 #define ISMULOP(x) \
1898 ((x) >= STAR && (x) <= AND)
1900 static oberon_expr_t
*
1901 oberon_term_expr(oberon_context_t
* ctx
)
1903 oberon_expr_t
* expr
;
1905 expr
= oberon_factor(ctx
);
1906 while(ISMULOP(ctx
-> token
))
1908 int token
= ctx
-> token
;
1909 oberon_read_token(ctx
);
1911 oberon_expr_t
* inter
= oberon_factor(ctx
);
1912 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
1918 #define ISADDOP(x) \
1919 ((x) >= PLUS && (x) <= OR)
1921 static oberon_expr_t
*
1922 oberon_simple_expr(oberon_context_t
* ctx
)
1924 oberon_expr_t
* expr
;
1927 if(ctx
-> token
== PLUS
)
1930 oberon_assert_token(ctx
, PLUS
);
1932 else if(ctx
-> token
== MINUS
)
1935 oberon_assert_token(ctx
, MINUS
);
1938 expr
= oberon_term_expr(ctx
);
1942 expr
= oberon_make_unary_op(ctx
, MINUS
, expr
);
1945 while(ISADDOP(ctx
-> token
))
1947 int token
= ctx
-> token
;
1948 oberon_read_token(ctx
);
1950 oberon_expr_t
* inter
= oberon_term_expr(ctx
);
1951 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
1957 #define ISRELATION(x) \
1958 ((x) >= EQUAL && (x) <= IS)
1960 static oberon_expr_t
*
1961 oberon_expr(oberon_context_t
* ctx
)
1963 oberon_expr_t
* expr
;
1965 expr
= oberon_simple_expr(ctx
);
1966 while(ISRELATION(ctx
-> token
))
1968 int token
= ctx
-> token
;
1969 oberon_read_token(ctx
);
1971 oberon_expr_t
* inter
= oberon_simple_expr(ctx
);
1972 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
1979 oberon_is_const(oberon_expr_t
* expr
)
1981 if(expr
-> is_item
== false)
1986 switch(expr
-> item
.mode
)
2007 oberon_check_const(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2009 if(!oberon_is_const(expr
))
2011 oberon_error(ctx
, "const expression are required");
2015 static oberon_item_t
*
2016 oberon_const_expr(oberon_context_t
* ctx
)
2018 oberon_expr_t
* expr
;
2019 expr
= oberon_expr(ctx
);
2020 oberon_check_const(ctx
, expr
);
2021 return (oberon_item_t
*) expr
;
2024 // =======================================================================
2026 // =======================================================================
2028 static void oberon_decl_seq(oberon_context_t
* ctx
);
2029 static void oberon_statement_seq(oberon_context_t
* ctx
);
2030 static void oberon_initialize_decl(oberon_context_t
* ctx
);
2033 oberon_expect_token(oberon_context_t
* ctx
, int token
)
2035 if(ctx
-> token
!= token
)
2037 oberon_error(ctx
, "unexpected token %i (%i)", ctx
-> token
, token
);
2042 oberon_assert_token(oberon_context_t
* ctx
, int token
)
2044 oberon_expect_token(ctx
, token
);
2045 oberon_read_token(ctx
);
2049 oberon_assert_ident(oberon_context_t
* ctx
)
2051 oberon_expect_token(ctx
, IDENT
);
2052 char * ident
= ctx
-> string
;
2053 oberon_read_token(ctx
);
2058 oberon_def(oberon_context_t
* ctx
, int * export
, int * read_only
)
2060 switch(ctx
-> token
)
2063 oberon_assert_token(ctx
, STAR
);
2068 oberon_assert_token(ctx
, MINUS
);
2079 static oberon_object_t
*
2080 oberon_ident_def(oberon_context_t
* ctx
, int class, bool check_upscope
)
2085 oberon_object_t
* x
;
2087 name
= oberon_assert_ident(ctx
);
2088 oberon_def(ctx
, &export
, &read_only
);
2090 x
= oberon_define_object(ctx
-> decl
, name
, class, export
, read_only
, check_upscope
);
2095 oberon_ident_list(oberon_context_t
* ctx
, int class, bool check_upscope
, int * num
, oberon_object_t
** list
)
2098 *list
= oberon_ident_def(ctx
, class, check_upscope
);
2099 while(ctx
-> token
== COMMA
)
2101 oberon_assert_token(ctx
, COMMA
);
2102 oberon_ident_def(ctx
, class, check_upscope
);
2108 oberon_var_decl(oberon_context_t
* ctx
)
2111 oberon_object_t
* list
;
2112 oberon_type_t
* type
;
2113 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2115 oberon_ident_list(ctx
, OBERON_CLASS_VAR
, false, &num
, &list
);
2116 oberon_assert_token(ctx
, COLON
);
2117 oberon_type(ctx
, &type
);
2119 oberon_object_t
* var
= list
;
2120 for(int i
= 0; i
< num
; i
++)
2127 static oberon_object_t
*
2128 oberon_fp_section(oberon_context_t
* ctx
, int * num_decl
)
2130 int class = OBERON_CLASS_PARAM
;
2131 if(ctx
-> token
== VAR
)
2133 oberon_read_token(ctx
);
2134 class = OBERON_CLASS_VAR_PARAM
;
2138 oberon_object_t
* list
;
2139 oberon_ident_list(ctx
, class, false, &num
, &list
);
2141 oberon_assert_token(ctx
, COLON
);
2143 oberon_type_t
* type
;
2144 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2145 oberon_type(ctx
, &type
);
2147 oberon_object_t
* param
= list
;
2148 for(int i
= 0; i
< num
; i
++)
2150 param
-> type
= type
;
2151 param
= param
-> next
;
2158 #define ISFPSECTION \
2159 ((ctx -> token == VAR) || (ctx -> token == IDENT))
2162 oberon_formal_pars(oberon_context_t
* ctx
, oberon_type_t
* signature
)
2164 oberon_assert_token(ctx
, LPAREN
);
2168 signature
-> decl
= oberon_fp_section(ctx
, &signature
-> num_decl
);
2169 while(ctx
-> token
== SEMICOLON
)
2171 oberon_assert_token(ctx
, SEMICOLON
);
2172 oberon_fp_section(ctx
, &signature
-> num_decl
);
2176 oberon_assert_token(ctx
, RPAREN
);
2178 if(ctx
-> token
== COLON
)
2180 oberon_assert_token(ctx
, COLON
);
2182 oberon_object_t
* typeobj
;
2183 typeobj
= oberon_qualident(ctx
, NULL
, 1);
2184 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2186 oberon_error(ctx
, "function result is not type");
2188 if(typeobj
-> type
-> class == OBERON_TYPE_RECORD
2189 || typeobj
-> type
-> class == OBERON_TYPE_ARRAY
)
2191 oberon_error(ctx
, "records or arrays could not be result of function");
2193 signature
-> base
= typeobj
-> type
;
2198 oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
)
2200 oberon_type_t
* signature
;
2202 signature
-> class = OBERON_TYPE_PROCEDURE
;
2203 signature
-> num_decl
= 0;
2204 signature
-> base
= ctx
-> notype_type
;
2205 signature
-> decl
= NULL
;
2207 if(ctx
-> token
== LPAREN
)
2209 oberon_formal_pars(ctx
, signature
);
2214 oberon_compare_signatures(oberon_context_t
* ctx
, oberon_type_t
* a
, oberon_type_t
* b
)
2216 if(a
-> num_decl
!= b
-> num_decl
)
2218 oberon_error(ctx
, "number parameters not matched");
2221 int num_param
= a
-> num_decl
;
2222 oberon_object_t
* param_a
= a
-> decl
;
2223 oberon_object_t
* param_b
= b
-> decl
;
2224 for(int i
= 0; i
< num_param
; i
++)
2226 if(strcmp(param_a
-> name
, param_b
-> name
) != 0)
2228 oberon_error(ctx
, "param %i name not matched", i
+ 1);
2231 if(param_a
-> type
!= param_b
-> type
)
2233 oberon_error(ctx
, "param %i type not matched", i
+ 1);
2236 param_a
= param_a
-> next
;
2237 param_b
= param_b
-> next
;
2242 oberon_make_return(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2244 oberon_object_t
* proc
= ctx
-> decl
-> parent
;
2245 oberon_type_t
* result_type
= proc
-> type
-> base
;
2247 if(result_type
-> class == OBERON_TYPE_NOTYPE
)
2251 oberon_error(ctx
, "procedure has no result type");
2258 oberon_error(ctx
, "procedure requires expression on result");
2261 oberon_check_src(ctx
, expr
);
2262 oberon_check_assignment_compatible(ctx
, expr
, result_type
);
2263 expr
= oberon_cast_expr(ctx
, expr
, result_type
);
2266 proc
-> has_return
= 1;
2268 oberon_generate_return(ctx
, expr
);
2272 oberon_proc_decl_body(oberon_context_t
* ctx
, oberon_object_t
* proc
)
2274 oberon_assert_token(ctx
, SEMICOLON
);
2276 ctx
-> decl
= proc
-> scope
;
2278 oberon_decl_seq(ctx
);
2280 oberon_generate_begin_proc(ctx
, proc
);
2282 if(ctx
-> token
== BEGIN
)
2284 oberon_assert_token(ctx
, BEGIN
);
2285 oberon_statement_seq(ctx
);
2288 oberon_assert_token(ctx
, END
);
2289 char * name
= oberon_assert_ident(ctx
);
2290 if(strcmp(name
, proc
-> name
) != 0)
2292 oberon_error(ctx
, "procedure name not matched");
2295 if(proc
-> type
-> base
-> class == OBERON_TYPE_NOTYPE
2296 && proc
-> has_return
== 0)
2298 oberon_make_return(ctx
, NULL
);
2301 if(proc
-> has_return
== 0)
2303 oberon_error(ctx
, "procedure requires return");
2306 oberon_generate_end_proc(ctx
);
2307 oberon_close_scope(ctx
-> decl
);
2311 oberon_proc_decl(oberon_context_t
* ctx
)
2313 oberon_assert_token(ctx
, PROCEDURE
);
2316 if(ctx
-> token
== UPARROW
)
2318 oberon_assert_token(ctx
, UPARROW
);
2325 name
= oberon_assert_ident(ctx
);
2326 oberon_def(ctx
, &export
, &read_only
);
2328 oberon_scope_t
* proc_scope
;
2329 proc_scope
= oberon_open_scope(ctx
);
2330 ctx
-> decl
-> local
= 1;
2332 oberon_type_t
* signature
;
2333 signature
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2334 oberon_opt_formal_pars(ctx
, &signature
);
2336 //oberon_initialize_decl(ctx);
2337 oberon_generator_init_type(ctx
, signature
);
2338 oberon_close_scope(ctx
-> decl
);
2340 oberon_object_t
* proc
;
2341 proc
= oberon_find_object(ctx
-> decl
, name
, 0);
2344 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, export
, read_only
, false);
2345 proc
-> type
= signature
;
2346 proc
-> scope
= proc_scope
;
2347 oberon_generator_init_proc(ctx
, proc
);
2351 if(proc
-> class != OBERON_CLASS_PROC
)
2353 oberon_error(ctx
, "mult definition");
2360 oberon_error(ctx
, "mult procedure definition");
2364 if(proc
-> export
!= export
|| proc
-> read_only
!= read_only
)
2366 oberon_error(ctx
, "export type not matched");
2369 oberon_compare_signatures(ctx
, proc
-> type
, signature
);
2372 proc_scope
-> parent
= proc
;
2373 oberon_object_t
* param
= proc_scope
-> list
-> next
;
2376 param
-> parent
= proc
;
2377 param
= param
-> next
;
2383 oberon_proc_decl_body(ctx
, proc
);
2388 oberon_const_decl(oberon_context_t
* ctx
)
2390 oberon_item_t
* value
;
2391 oberon_object_t
* constant
;
2393 constant
= oberon_ident_def(ctx
, OBERON_CLASS_CONST
, false);
2394 oberon_assert_token(ctx
, EQUAL
);
2395 value
= oberon_const_expr(ctx
);
2396 constant
-> value
= value
;
2400 oberon_make_array_type(oberon_context_t
* ctx
, oberon_expr_t
* size
, oberon_type_t
* base
, oberon_type_t
** type
)
2402 if(size
-> is_item
== 0)
2404 oberon_error(ctx
, "requires constant");
2407 if(size
-> item
.mode
!= MODE_INTEGER
)
2409 oberon_error(ctx
, "requires integer constant");
2412 oberon_type_t
* arr
;
2414 arr
-> class = OBERON_TYPE_ARRAY
;
2415 arr
-> size
= size
-> item
.integer
;
2420 oberon_qualident_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2423 oberon_object_t
* to
;
2425 to
= oberon_qualident(ctx
, &name
, 0);
2427 //name = oberon_assert_ident(ctx);
2428 //to = oberon_find_object(ctx -> decl, name, 0);
2432 if(to
-> class != OBERON_CLASS_TYPE
)
2434 oberon_error(ctx
, "not a type");
2439 to
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, false, false, false);
2440 to
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2446 static void oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
);
2449 * Правило граматики "type". Указатель type должен указывать на существующий объект!
2453 oberon_make_multiarray(oberon_context_t
* ctx
, oberon_expr_t
* sizes
, oberon_type_t
* base
, oberon_type_t
** type
)
2461 oberon_type_t
* dim
;
2462 dim
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2464 oberon_make_multiarray(ctx
, sizes
-> next
, base
, &dim
);
2466 oberon_make_array_type(ctx
, sizes
, dim
, type
);
2470 oberon_make_open_array(oberon_context_t
* ctx
, oberon_type_t
* base
, oberon_type_t
* type
)
2472 type
-> class = OBERON_TYPE_ARRAY
;
2474 type
-> base
= base
;
2478 oberon_field_list(oberon_context_t
* ctx
, oberon_type_t
* rec
, oberon_scope_t
* modscope
)
2480 if(ctx
-> token
== IDENT
)
2483 oberon_object_t
* list
;
2484 oberon_type_t
* type
;
2485 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2487 oberon_ident_list(ctx
, OBERON_CLASS_FIELD
, true, &num
, &list
);
2488 oberon_assert_token(ctx
, COLON
);
2490 oberon_scope_t
* current
= ctx
-> decl
;
2491 ctx
-> decl
= modscope
;
2492 oberon_type(ctx
, &type
);
2493 ctx
-> decl
= current
;
2495 oberon_object_t
* field
= list
;
2496 for(int i
= 0; i
< num
; i
++)
2498 field
-> type
= type
;
2499 field
= field
-> next
;
2502 rec
-> num_decl
+= num
;
2507 oberon_type_record_body(oberon_context_t
* ctx
, oberon_type_t
* rec
)
2509 oberon_scope_t
* modscope
= ctx
-> mod
-> decl
;
2510 oberon_scope_t
* oldscope
= ctx
-> decl
;
2511 ctx
-> decl
= modscope
;
2513 if(ctx
-> token
== LPAREN
)
2515 oberon_assert_token(ctx
, LPAREN
);
2517 oberon_object_t
* typeobj
;
2518 typeobj
= oberon_qualident(ctx
, NULL
, true);
2520 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2522 oberon_error(ctx
, "base must be type");
2525 oberon_type_t
* base
= typeobj
-> type
;
2526 if(base
-> class == OBERON_TYPE_POINTER
)
2528 base
= base
-> base
;
2531 if(base
-> class != OBERON_TYPE_RECORD
)
2533 oberon_error(ctx
, "base must be record type");
2537 ctx
-> decl
= base
-> scope
;
2539 oberon_assert_token(ctx
, RPAREN
);
2546 oberon_scope_t
* this_scope
;
2547 this_scope
= oberon_open_scope(ctx
);
2548 this_scope
-> local
= true;
2549 this_scope
-> parent
= NULL
;
2550 this_scope
-> parent_type
= rec
;
2552 oberon_field_list(ctx
, rec
, modscope
);
2553 while(ctx
-> token
== SEMICOLON
)
2555 oberon_assert_token(ctx
, SEMICOLON
);
2556 oberon_field_list(ctx
, rec
, modscope
);
2559 rec
-> scope
= this_scope
;
2560 rec
-> decl
= this_scope
-> list
-> next
;
2561 ctx
-> decl
= oldscope
;
2565 oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2567 if(ctx
-> token
== IDENT
)
2569 oberon_qualident_type(ctx
, type
);
2571 else if(ctx
-> token
== ARRAY
)
2573 oberon_assert_token(ctx
, ARRAY
);
2576 oberon_expr_t
* sizes
;
2578 if(ISEXPR(ctx
-> token
))
2580 oberon_expr_list(ctx
, &num_sizes
, &sizes
, 1);
2583 oberon_assert_token(ctx
, OF
);
2585 oberon_type_t
* base
;
2586 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2587 oberon_type(ctx
, &base
);
2591 oberon_make_open_array(ctx
, base
, *type
);
2595 oberon_make_multiarray(ctx
, sizes
, base
, type
);
2598 else if(ctx
-> token
== RECORD
)
2600 oberon_type_t
* rec
;
2602 rec
-> class = OBERON_TYPE_RECORD
;
2603 rec
-> module
= ctx
-> mod
;
2605 oberon_assert_token(ctx
, RECORD
);
2606 oberon_type_record_body(ctx
, rec
);
2607 oberon_assert_token(ctx
, END
);
2611 else if(ctx
-> token
== POINTER
)
2613 oberon_assert_token(ctx
, POINTER
);
2614 oberon_assert_token(ctx
, TO
);
2616 oberon_type_t
* base
;
2617 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2618 oberon_type(ctx
, &base
);
2620 oberon_type_t
* ptr
;
2622 ptr
-> class = OBERON_TYPE_POINTER
;
2625 else if(ctx
-> token
== PROCEDURE
)
2627 oberon_open_scope(ctx
);
2628 oberon_assert_token(ctx
, PROCEDURE
);
2629 oberon_opt_formal_pars(ctx
, type
);
2630 oberon_close_scope(ctx
-> decl
);
2634 oberon_error(ctx
, "invalid type declaration");
2639 oberon_type_decl(oberon_context_t
* ctx
)
2642 oberon_object_t
* newtype
;
2643 oberon_type_t
* type
;
2647 name
= oberon_assert_ident(ctx
);
2648 oberon_def(ctx
, &export
, &read_only
);
2650 newtype
= oberon_find_object(ctx
-> decl
, name
, 0);
2653 newtype
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, export
, read_only
, false);
2654 newtype
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2655 assert(newtype
-> type
);
2659 if(newtype
-> class != OBERON_CLASS_TYPE
)
2661 oberon_error(ctx
, "mult definition");
2664 if(newtype
-> linked
)
2666 oberon_error(ctx
, "mult definition - already linked");
2669 newtype
-> export
= export
;
2670 newtype
-> read_only
= read_only
;
2673 oberon_assert_token(ctx
, EQUAL
);
2675 type
= newtype
-> type
;
2676 oberon_type(ctx
, &type
);
2678 if(type
-> class == OBERON_TYPE_NOTYPE
)
2680 oberon_error(ctx
, "recursive alias declaration");
2683 newtype
-> type
= type
;
2684 newtype
-> linked
= 1;
2687 static void oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2688 static void oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2691 oberon_prevent_recursive_pointer(oberon_context_t
* ctx
, oberon_type_t
* type
)
2693 if(type
-> class != OBERON_TYPE_POINTER
2694 && type
-> class != OBERON_TYPE_ARRAY
)
2699 if(type
-> recursive
)
2701 oberon_error(ctx
, "recursive pointer declaration");
2704 if(type
-> class == OBERON_TYPE_POINTER
2705 && type
-> base
-> class == OBERON_TYPE_POINTER
)
2707 oberon_error(ctx
, "attempt to make pointer to pointer");
2710 type
-> recursive
= 1;
2712 oberon_prevent_recursive_pointer(ctx
, type
-> base
);
2714 type
-> recursive
= 0;
2718 oberon_prevent_recursive_record(oberon_context_t
* ctx
, oberon_type_t
* type
)
2720 if(type
-> class != OBERON_TYPE_RECORD
)
2725 if(type
-> recursive
)
2727 oberon_error(ctx
, "recursive record declaration");
2730 type
-> recursive
= 1;
2734 oberon_prevent_recursive_record(ctx
, type
-> base
);
2737 int num_fields
= type
-> num_decl
;
2738 oberon_object_t
* field
= type
-> decl
;
2739 for(int i
= 0; i
< num_fields
; i
++)
2741 oberon_prevent_recursive_object(ctx
, field
);
2742 field
= field
-> next
;
2745 type
-> recursive
= 0;
2748 oberon_prevent_recursive_procedure(oberon_context_t
* ctx
, oberon_type_t
* type
)
2750 if(type
-> class != OBERON_TYPE_PROCEDURE
)
2755 if(type
-> recursive
)
2757 oberon_error(ctx
, "recursive procedure declaration");
2760 type
-> recursive
= 1;
2762 int num_fields
= type
-> num_decl
;
2763 oberon_object_t
* field
= type
-> decl
;
2764 for(int i
= 0; i
< num_fields
; i
++)
2766 oberon_prevent_recursive_object(ctx
, field
);
2767 field
= field
-> next
;
2770 type
-> recursive
= 0;
2774 oberon_prevent_recursive_array(oberon_context_t
* ctx
, oberon_type_t
* type
)
2776 if(type
-> class != OBERON_TYPE_ARRAY
)
2781 if(type
-> recursive
)
2783 oberon_error(ctx
, "recursive array declaration");
2786 type
-> recursive
= 1;
2788 oberon_prevent_recursive_type(ctx
, type
-> base
);
2790 type
-> recursive
= 0;
2794 oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2796 if(type
-> class == OBERON_TYPE_POINTER
)
2798 oberon_prevent_recursive_pointer(ctx
, type
);
2800 else if(type
-> class == OBERON_TYPE_RECORD
)
2802 oberon_prevent_recursive_record(ctx
, type
);
2804 else if(type
-> class == OBERON_TYPE_ARRAY
)
2806 oberon_prevent_recursive_array(ctx
, type
);
2808 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2810 oberon_prevent_recursive_procedure(ctx
, type
);
2815 oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2819 case OBERON_CLASS_VAR
:
2820 case OBERON_CLASS_TYPE
:
2821 case OBERON_CLASS_PARAM
:
2822 case OBERON_CLASS_VAR_PARAM
:
2823 case OBERON_CLASS_FIELD
:
2824 oberon_prevent_recursive_type(ctx
, x
-> type
);
2826 case OBERON_CLASS_CONST
:
2827 case OBERON_CLASS_PROC
:
2828 case OBERON_CLASS_MODULE
:
2831 oberon_error(ctx
, "oberon_prevent_recursive_object: wat");
2837 oberon_prevent_recursive_decl(oberon_context_t
* ctx
)
2839 oberon_object_t
* x
= ctx
-> decl
-> list
-> next
;
2843 oberon_prevent_recursive_object(ctx
, x
);
2848 static void oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2849 static void oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2852 oberon_initialize_record_fields(oberon_context_t
* ctx
, oberon_type_t
* type
)
2854 if(type
-> class != OBERON_TYPE_RECORD
)
2859 int num_fields
= type
-> num_decl
;
2860 oberon_object_t
* field
= type
-> decl
;
2861 for(int i
= 0; i
< num_fields
; i
++)
2863 if(field
-> type
-> class == OBERON_TYPE_POINTER
)
2865 oberon_initialize_type(ctx
, field
-> type
);
2868 oberon_initialize_object(ctx
, field
);
2869 field
= field
-> next
;
2872 oberon_generator_init_record(ctx
, type
);
2876 oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2878 if(type
-> class == OBERON_TYPE_NOTYPE
)
2880 oberon_error(ctx
, "undeclarated type");
2883 if(type
-> initialized
)
2888 type
-> initialized
= 1;
2890 if(type
-> class == OBERON_TYPE_POINTER
)
2892 oberon_initialize_type(ctx
, type
-> base
);
2893 oberon_generator_init_type(ctx
, type
);
2895 else if(type
-> class == OBERON_TYPE_ARRAY
)
2897 if(type
-> size
!= 0)
2899 if(type
-> base
-> class == OBERON_TYPE_ARRAY
)
2901 if(type
-> base
-> size
== 0)
2903 oberon_error(ctx
, "open array not allowed as array element");
2908 oberon_initialize_type(ctx
, type
-> base
);
2909 oberon_generator_init_type(ctx
, type
);
2911 else if(type
-> class == OBERON_TYPE_RECORD
)
2913 oberon_generator_init_type(ctx
, type
);
2914 oberon_initialize_record_fields(ctx
, type
);
2916 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2918 int num_fields
= type
-> num_decl
;
2919 oberon_object_t
* field
= type
-> decl
;
2920 for(int i
= 0; i
< num_fields
; i
++)
2922 oberon_initialize_object(ctx
, field
);
2923 field
= field
-> next
;
2926 oberon_generator_init_type(ctx
, type
);
2930 oberon_generator_init_type(ctx
, type
);
2935 oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2937 if(x
-> initialized
)
2942 x
-> initialized
= 1;
2946 case OBERON_CLASS_TYPE
:
2947 oberon_initialize_type(ctx
, x
-> type
);
2949 case OBERON_CLASS_VAR
:
2950 case OBERON_CLASS_FIELD
:
2951 if(x
-> type
-> class == OBERON_TYPE_ARRAY
)
2953 if(x
-> type
-> size
== 0)
2955 oberon_error(ctx
, "open array not allowed as variable or field");
2958 oberon_initialize_type(ctx
, x
-> type
);
2959 oberon_generator_init_var(ctx
, x
);
2961 case OBERON_CLASS_PARAM
:
2962 case OBERON_CLASS_VAR_PARAM
:
2963 oberon_initialize_type(ctx
, x
-> type
);
2964 oberon_generator_init_var(ctx
, x
);
2966 case OBERON_CLASS_CONST
:
2967 case OBERON_CLASS_PROC
:
2968 case OBERON_CLASS_MODULE
:
2971 oberon_error(ctx
, "oberon_initialize_object: wat");
2977 oberon_initialize_decl(oberon_context_t
* ctx
)
2979 oberon_object_t
* x
= ctx
-> decl
-> list
;
2983 oberon_initialize_object(ctx
, x
-> next
);
2989 oberon_prevent_undeclarated_procedures(oberon_context_t
* ctx
)
2991 oberon_object_t
* x
= ctx
-> decl
-> list
;
2995 if(x
-> next
-> class == OBERON_CLASS_PROC
)
2997 if(x
-> next
-> linked
== 0)
2999 oberon_error(ctx
, "unresolved forward declaration");
3007 oberon_decl_seq(oberon_context_t
* ctx
)
3009 if(ctx
-> token
== CONST
)
3011 oberon_assert_token(ctx
, CONST
);
3012 while(ctx
-> token
== IDENT
)
3014 oberon_const_decl(ctx
);
3015 oberon_assert_token(ctx
, SEMICOLON
);
3019 if(ctx
-> token
== TYPE
)
3021 oberon_assert_token(ctx
, TYPE
);
3022 while(ctx
-> token
== IDENT
)
3024 oberon_type_decl(ctx
);
3025 oberon_assert_token(ctx
, SEMICOLON
);
3029 if(ctx
-> token
== VAR
)
3031 oberon_assert_token(ctx
, VAR
);
3032 while(ctx
-> token
== IDENT
)
3034 oberon_var_decl(ctx
);
3035 oberon_assert_token(ctx
, SEMICOLON
);
3039 oberon_prevent_recursive_decl(ctx
);
3040 oberon_initialize_decl(ctx
);
3042 while(ctx
-> token
== PROCEDURE
)
3044 oberon_proc_decl(ctx
);
3045 oberon_assert_token(ctx
, SEMICOLON
);
3048 oberon_prevent_undeclarated_procedures(ctx
);
3051 static oberon_expr_t
*
3052 oberon_make_temp_var_item(oberon_context_t
* ctx
, oberon_type_t
* type
)
3054 oberon_object_t
* x
;
3055 oberon_expr_t
* expr
;
3057 x
= oberon_create_object(ctx
-> decl
, "TEMP", OBERON_CLASS_VAR
, false, false);
3060 oberon_generator_init_temp_var(ctx
, x
);
3062 expr
= oberon_new_item(MODE_VAR
, type
, false);
3063 expr
-> item
.var
= x
;
3068 oberon_statement_seq(oberon_context_t
* ctx
);
3071 oberon_assign(oberon_context_t
* ctx
, oberon_expr_t
* src
, oberon_expr_t
* dst
)
3073 oberon_check_dst(ctx
, dst
);
3074 oberon_check_assignment_compatible(ctx
, src
, dst
-> result
);
3076 if(oberon_is_string_type(src
-> result
))
3079 oberon_make_copy_call(ctx
, 2, src
);
3083 src
= oberon_cast_expr(ctx
, src
, dst
-> result
);
3084 oberon_generate_assign(ctx
, src
, dst
);
3088 static oberon_expr_t
*
3089 oberon_case_labels(oberon_context_t
* ctx
, oberon_expr_t
* val
)
3093 oberon_expr_t
* cond
;
3094 oberon_expr_t
* cond2
;
3096 e1
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3099 if(ctx
-> token
== DOTDOT
)
3101 oberon_assert_token(ctx
, DOTDOT
);
3102 e2
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3108 cond
= oberon_make_bin_op(ctx
, EQUAL
, val
, e1
);
3112 /* val >= e1 && val <= e2 */
3113 cond
= oberon_make_bin_op(ctx
, GEQ
, val
, e1
);
3114 cond2
= oberon_make_bin_op(ctx
, LEQ
, val
, e2
);
3115 cond
= oberon_make_bin_op(ctx
, AND
, cond
, cond2
);
3122 oberon_case(oberon_context_t
* ctx
, oberon_expr_t
* val
, gen_label_t
* end
)
3124 oberon_expr_t
* cond
;
3125 oberon_expr_t
* cond2
;
3126 gen_label_t
* this_end
;
3128 if(ISEXPR(ctx
-> token
))
3130 this_end
= oberon_generator_reserve_label(ctx
);
3132 cond
= oberon_case_labels(ctx
, val
);
3133 while(ctx
-> token
== COMMA
)
3135 oberon_assert_token(ctx
, COMMA
);
3137 cond2
= oberon_case_labels(ctx
, val
);
3138 cond
= oberon_make_bin_op(ctx
, OR
, cond
, cond2
);
3140 oberon_assert_token(ctx
, COLON
);
3142 oberon_generate_branch(ctx
, cond
, false, this_end
);
3143 oberon_statement_seq(ctx
);
3144 oberon_generate_goto(ctx
, end
);
3146 oberon_generate_label(ctx
, this_end
);
3151 oberon_case_statement(oberon_context_t
* ctx
)
3153 oberon_expr_t
* val
;
3154 oberon_expr_t
* expr
;
3157 end
= oberon_generator_reserve_label(ctx
);
3159 oberon_assert_token(ctx
, CASE
);
3160 expr
= oberon_expr(ctx
);
3161 val
= oberon_make_temp_var_item(ctx
, expr
-> result
);
3162 oberon_assign(ctx
, expr
, val
);
3163 oberon_assert_token(ctx
, OF
);
3164 oberon_case(ctx
, val
, end
);
3165 while(ctx
-> token
== BAR
)
3167 oberon_assert_token(ctx
, BAR
);
3168 oberon_case(ctx
, val
, end
);
3171 if(ctx
-> token
== ELSE
)
3173 oberon_assert_token(ctx
, ELSE
);
3174 oberon_statement_seq(ctx
);
3178 oberon_generate_trap(ctx
, -1);
3181 oberon_generate_label(ctx
, end
);
3182 oberon_assert_token(ctx
, END
);
3186 oberon_with_guard_do(oberon_context_t
* ctx
, gen_label_t
* end
)
3188 oberon_expr_t
* val
;
3189 oberon_expr_t
* var
;
3190 oberon_expr_t
* type
;
3191 oberon_expr_t
* cond
;
3192 oberon_expr_t
* cast
;
3193 oberon_type_t
* old_type
;
3194 gen_var_t
* old_var
;
3195 gen_label_t
* this_end
;
3197 this_end
= oberon_generator_reserve_label(ctx
);
3199 var
= oberon_qualident_expr(ctx
);
3200 oberon_assert_token(ctx
, COLON
);
3201 type
= oberon_qualident_expr(ctx
);
3202 cond
= oberon_make_bin_op(ctx
, IS
, var
, type
);
3204 oberon_assert_token(ctx
, DO
);
3205 oberon_generate_branch(ctx
, cond
, false, this_end
);
3207 /* Сохраняем ссылку во временной переменной */
3208 val
= oberon_make_temp_var_item(ctx
, type
-> result
);
3209 //cast = oberno_make_record_cast(ctx, var, type -> result);
3210 cast
= oberon_cast_expr(ctx
, var
, type
-> result
);
3211 oberon_assign(ctx
, cast
, val
);
3212 /* Подменяем тип у оригинальной переменной */
3213 old_type
= var
-> item
.var
-> type
;
3214 var
-> item
.var
-> type
= type
-> result
;
3215 /* Подменяем ссылку на переменную */
3216 old_var
= var
-> item
.var
-> gen_var
;
3217 var
-> item
.var
-> gen_var
= val
-> item
.var
-> gen_var
;
3219 oberon_statement_seq(ctx
);
3220 oberon_generate_goto(ctx
, end
);
3221 oberon_generate_label(ctx
, this_end
);
3223 /* Возвращаем исходное состояние */
3224 var
-> item
.var
-> gen_var
= old_var
;
3225 var
-> item
.var
-> type
= old_type
;
3229 oberon_with_statement(oberon_context_t
* ctx
)
3232 end
= oberon_generator_reserve_label(ctx
);
3234 oberon_assert_token(ctx
, WITH
);
3235 oberon_with_guard_do(ctx
, end
);
3236 while(ctx
-> token
== BAR
)
3238 oberon_assert_token(ctx
, BAR
);
3239 oberon_with_guard_do(ctx
, end
);
3242 if(ctx
-> token
== ELSE
)
3244 oberon_assert_token(ctx
, ELSE
);
3245 oberon_statement_seq(ctx
);
3249 oberon_generate_trap(ctx
, -2);
3252 oberon_generate_label(ctx
, end
);
3253 oberon_assert_token(ctx
, END
);
3257 oberon_statement(oberon_context_t
* ctx
)
3259 oberon_expr_t
* item1
;
3260 oberon_expr_t
* item2
;
3262 if(ctx
-> token
== IDENT
)
3264 item1
= oberon_designator(ctx
);
3265 if(ctx
-> token
== ASSIGN
)
3267 oberon_assert_token(ctx
, ASSIGN
);
3268 item2
= oberon_expr(ctx
);
3269 oberon_assign(ctx
, item2
, item1
);
3273 oberon_opt_proc_parens(ctx
, item1
);
3276 else if(ctx
-> token
== IF
)
3280 oberon_expr_t
* cond
;
3282 els
= oberon_generator_reserve_label(ctx
);
3283 end
= oberon_generator_reserve_label(ctx
);
3285 oberon_assert_token(ctx
, IF
);
3286 cond
= oberon_expr(ctx
);
3287 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3289 oberon_error(ctx
, "condition must be boolean");
3291 oberon_assert_token(ctx
, THEN
);
3292 oberon_generate_branch(ctx
, cond
, false, els
);
3293 oberon_statement_seq(ctx
);
3294 oberon_generate_goto(ctx
, end
);
3295 oberon_generate_label(ctx
, els
);
3297 while(ctx
-> token
== ELSIF
)
3299 els
= oberon_generator_reserve_label(ctx
);
3301 oberon_assert_token(ctx
, ELSIF
);
3302 cond
= oberon_expr(ctx
);
3303 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3305 oberon_error(ctx
, "condition must be boolean");
3307 oberon_assert_token(ctx
, THEN
);
3308 oberon_generate_branch(ctx
, cond
, false, els
);
3309 oberon_statement_seq(ctx
);
3310 oberon_generate_goto(ctx
, end
);
3311 oberon_generate_label(ctx
, els
);
3314 if(ctx
-> token
== ELSE
)
3316 oberon_assert_token(ctx
, ELSE
);
3317 oberon_statement_seq(ctx
);
3320 oberon_generate_label(ctx
, end
);
3321 oberon_assert_token(ctx
, END
);
3323 else if(ctx
-> token
== WHILE
)
3325 gen_label_t
* begin
;
3327 oberon_expr_t
* cond
;
3329 begin
= oberon_generator_reserve_label(ctx
);
3330 end
= oberon_generator_reserve_label(ctx
);
3332 oberon_assert_token(ctx
, WHILE
);
3333 oberon_generate_label(ctx
, begin
);
3334 cond
= oberon_expr(ctx
);
3335 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3337 oberon_error(ctx
, "condition must be boolean");
3339 oberon_generate_branch(ctx
, cond
, false, end
);
3341 oberon_assert_token(ctx
, DO
);
3342 oberon_statement_seq(ctx
);
3343 oberon_generate_goto(ctx
, begin
);
3345 oberon_assert_token(ctx
, END
);
3346 oberon_generate_label(ctx
, end
);
3348 else if(ctx
-> token
== REPEAT
)
3350 gen_label_t
* begin
;
3351 oberon_expr_t
* cond
;
3353 begin
= oberon_generator_reserve_label(ctx
);
3354 oberon_generate_label(ctx
, begin
);
3355 oberon_assert_token(ctx
, REPEAT
);
3357 oberon_statement_seq(ctx
);
3359 oberon_assert_token(ctx
, UNTIL
);
3361 cond
= oberon_expr(ctx
);
3362 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3364 oberon_error(ctx
, "condition must be boolean");
3367 oberon_generate_branch(ctx
, cond
, true, begin
);
3369 else if(ctx
-> token
== FOR
)
3371 oberon_expr_t
* from
;
3372 oberon_expr_t
* index
;
3374 oberon_expr_t
* bound
;
3376 oberon_expr_t
* cond
;
3377 oberon_expr_t
* count
;
3378 gen_label_t
* begin
;
3383 begin
= oberon_generator_reserve_label(ctx
);
3384 end
= oberon_generator_reserve_label(ctx
);
3386 oberon_assert_token(ctx
, FOR
);
3387 iname
= oberon_assert_ident(ctx
);
3388 index
= oberon_ident_item(ctx
, iname
);
3389 oberon_assert_token(ctx
, ASSIGN
);
3390 from
= oberon_expr(ctx
);
3391 oberon_assert_token(ctx
, TO
);
3392 bound
= oberon_make_temp_var_item(ctx
, index
-> result
);
3393 to
= oberon_expr(ctx
);
3394 oberon_assign(ctx
, to
, bound
); // сначала temp
3395 oberon_assign(ctx
, from
, index
); // потом i
3396 if(ctx
-> token
== BY
)
3398 oberon_assert_token(ctx
, BY
);
3399 by
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3403 by
= oberon_make_integer(ctx
, 1);
3406 if(by
-> result
-> class != OBERON_TYPE_INTEGER
)
3408 oberon_error(ctx
, "must be integer");
3411 if(by
-> item
.integer
> 0)
3415 else if(by
-> item
.integer
< 0)
3421 oberon_error(ctx
, "zero step not allowed");
3424 oberon_assert_token(ctx
, DO
);
3425 oberon_generate_label(ctx
, begin
);
3426 cond
= oberon_make_bin_op(ctx
, op
, index
, bound
);
3427 oberon_generate_branch(ctx
, cond
, false, end
);
3428 oberon_statement_seq(ctx
);
3429 count
= oberon_make_bin_op(ctx
, PLUS
, index
, by
);
3430 oberon_assign(ctx
, count
, index
);
3431 oberon_generate_goto(ctx
, begin
);
3432 oberon_generate_label(ctx
, end
);
3433 oberon_assert_token(ctx
, END
);
3435 else if(ctx
-> token
== LOOP
)
3437 gen_label_t
* begin
;
3440 begin
= oberon_generator_reserve_label(ctx
);
3441 end
= oberon_generator_reserve_label(ctx
);
3443 oberon_open_scope(ctx
);
3444 oberon_assert_token(ctx
, LOOP
);
3445 oberon_generate_label(ctx
, begin
);
3446 ctx
-> decl
-> exit_label
= end
;
3447 oberon_statement_seq(ctx
);
3448 oberon_generate_goto(ctx
, begin
);
3449 oberon_generate_label(ctx
, end
);
3450 oberon_assert_token(ctx
, END
);
3451 oberon_close_scope(ctx
-> decl
);
3453 else if(ctx
-> token
== EXIT
)
3455 oberon_assert_token(ctx
, EXIT
);
3456 if(ctx
-> decl
-> exit_label
== NULL
)
3458 oberon_error(ctx
, "not in LOOP-END");
3460 oberon_generate_goto(ctx
, ctx
-> decl
-> exit_label
);
3462 else if(ctx
-> token
== CASE
)
3464 oberon_case_statement(ctx
);
3466 else if(ctx
-> token
== WITH
)
3468 oberon_with_statement(ctx
);
3470 else if(ctx
-> token
== RETURN
)
3472 oberon_assert_token(ctx
, RETURN
);
3473 if(ISEXPR(ctx
-> token
))
3475 oberon_expr_t
* expr
;
3476 expr
= oberon_expr(ctx
);
3477 oberon_make_return(ctx
, expr
);
3481 oberon_make_return(ctx
, NULL
);
3487 oberon_statement_seq(oberon_context_t
* ctx
)
3489 oberon_statement(ctx
);
3490 while(ctx
-> token
== SEMICOLON
)
3492 oberon_assert_token(ctx
, SEMICOLON
);
3493 oberon_statement(ctx
);
3498 oberon_import_module(oberon_context_t
* ctx
, char * alias
, char * name
)
3500 oberon_module_t
* m
= ctx
-> module_list
;
3501 while(m
&& strcmp(m
-> name
, name
) != 0)
3509 code
= ctx
-> import_module(name
);
3512 oberon_error(ctx
, "no such module");
3515 m
= oberon_compile_module(ctx
, code
);
3521 oberon_error(ctx
, "cyclic module import");
3524 oberon_object_t
* ident
;
3525 ident
= oberon_define_object(ctx
-> decl
, alias
, OBERON_CLASS_MODULE
, false, false, false);
3526 ident
-> module
= m
;
3530 oberon_import_decl(oberon_context_t
* ctx
)
3535 alias
= name
= oberon_assert_ident(ctx
);
3536 if(ctx
-> token
== ASSIGN
)
3538 oberon_assert_token(ctx
, ASSIGN
);
3539 name
= oberon_assert_ident(ctx
);
3542 oberon_import_module(ctx
, alias
, name
);
3546 oberon_import_list(oberon_context_t
* ctx
)
3548 oberon_assert_token(ctx
, IMPORT
);
3550 oberon_import_decl(ctx
);
3551 while(ctx
-> token
== COMMA
)
3553 oberon_assert_token(ctx
, COMMA
);
3554 oberon_import_decl(ctx
);
3557 oberon_assert_token(ctx
, SEMICOLON
);
3561 oberon_parse_module(oberon_context_t
* ctx
)
3565 oberon_read_token(ctx
);
3567 oberon_assert_token(ctx
, MODULE
);
3568 name1
= oberon_assert_ident(ctx
);
3569 oberon_assert_token(ctx
, SEMICOLON
);
3570 ctx
-> mod
-> name
= name1
;
3572 oberon_generator_init_module(ctx
, ctx
-> mod
);
3574 if(ctx
-> token
== IMPORT
)
3576 oberon_import_list(ctx
);
3579 oberon_decl_seq(ctx
);
3581 oberon_generate_begin_module(ctx
);
3582 if(ctx
-> token
== BEGIN
)
3584 oberon_assert_token(ctx
, BEGIN
);
3585 oberon_statement_seq(ctx
);
3587 oberon_generate_end_module(ctx
);
3589 oberon_assert_token(ctx
, END
);
3590 name2
= oberon_assert_ident(ctx
);
3591 oberon_expect_token(ctx
, DOT
);
3593 if(strcmp(name1
, name2
) != 0)
3595 oberon_error(ctx
, "module name not matched");
3598 oberon_generator_fini_module(ctx
-> mod
);
3601 // =======================================================================
3603 // =======================================================================
3606 register_default_types(oberon_context_t
* ctx
)
3608 ctx
-> notype_type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
3609 oberon_generator_init_type(ctx
, ctx
-> notype_type
);
3611 ctx
-> nil_type
= oberon_new_type_ptr(OBERON_TYPE_NIL
);
3612 oberon_generator_init_type(ctx
, ctx
-> nil_type
);
3614 ctx
-> string_type
= oberon_new_type_string(1);
3615 oberon_generator_init_type(ctx
, ctx
-> string_type
);
3617 ctx
-> bool_type
= oberon_new_type_boolean();
3618 oberon_define_type(ctx
-> world_scope
, "BOOLEAN", ctx
-> bool_type
, 1);
3620 ctx
-> char_type
= oberon_new_type_char(1);
3621 oberon_define_type(ctx
-> world_scope
, "CHAR", ctx
-> char_type
, 1);
3623 ctx
-> byte_type
= oberon_new_type_integer(1);
3624 oberon_define_type(ctx
-> world_scope
, "SHORTINT", ctx
-> byte_type
, 1);
3626 ctx
-> shortint_type
= oberon_new_type_integer(2);
3627 oberon_define_type(ctx
-> world_scope
, "INTEGER", ctx
-> shortint_type
, 1);
3629 ctx
-> int_type
= oberon_new_type_integer(4);
3630 oberon_define_type(ctx
-> world_scope
, "LONGINT", ctx
-> int_type
, 1);
3632 ctx
-> longint_type
= oberon_new_type_integer(8);
3633 oberon_define_type(ctx
-> world_scope
, "HUGEINT", ctx
-> longint_type
, 1);
3635 ctx
-> real_type
= oberon_new_type_real(4);
3636 oberon_define_type(ctx
-> world_scope
, "REAL", ctx
-> real_type
, 1);
3638 ctx
-> longreal_type
= oberon_new_type_real(8);
3639 oberon_define_type(ctx
-> world_scope
, "LONGREAL", ctx
-> longreal_type
, 1);
3641 ctx
-> set_type
= oberon_new_type_set(4);
3642 oberon_define_type(ctx
-> world_scope
, "SET", ctx
-> set_type
, 1);
3646 oberon_new_intrinsic(oberon_context_t
* ctx
, char * name
, GenerateFuncCallback f
, GenerateProcCallback p
)
3648 oberon_object_t
* proc
;
3649 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, true, false, false);
3650 proc
-> type
= oberon_new_type_ptr(OBERON_TYPE_PROCEDURE
);
3651 proc
-> type
-> sysproc
= true;
3652 proc
-> type
-> genfunc
= f
;
3653 proc
-> type
-> genproc
= p
;
3656 static oberon_expr_t
*
3657 oberon_make_min_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3661 oberon_error(ctx
, "too few arguments");
3666 oberon_error(ctx
, "too mach arguments");
3669 oberon_expr_t
* arg
;
3672 if(!arg
-> is_item
|| arg
-> item
.mode
!= MODE_TYPE
)
3674 oberon_error(ctx
, "MIN accept only type");
3677 oberon_expr_t
* expr
;
3678 int bits
= arg
-> result
-> size
* 8;
3679 switch(arg
-> result
-> class)
3681 case OBERON_TYPE_INTEGER
:
3682 expr
= oberon_make_integer(ctx
, -powl(2, bits
- 1));
3684 case OBERON_TYPE_SET
:
3685 expr
= oberon_make_integer(ctx
, 0);
3688 oberon_error(ctx
, "allowed only basic types");
3695 static oberon_expr_t
*
3696 oberon_make_max_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3700 oberon_error(ctx
, "too few arguments");
3705 oberon_error(ctx
, "too mach arguments");
3708 oberon_expr_t
* arg
;
3711 if(!arg
-> is_item
|| arg
-> item
.mode
!= MODE_TYPE
)
3713 oberon_error(ctx
, "MAX accept only type");
3716 oberon_expr_t
* expr
;
3717 int bits
= arg
-> result
-> size
* 8;
3718 switch(arg
-> result
-> class)
3720 case OBERON_TYPE_INTEGER
:
3721 expr
= oberon_make_integer(ctx
, powl(2, bits
- 1) - 1);
3723 case OBERON_TYPE_SET
:
3724 expr
= oberon_make_integer(ctx
, bits
);
3727 oberon_error(ctx
, "allowed only basic types");
3734 static oberon_expr_t
*
3735 oberon_make_size_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3739 oberon_error(ctx
, "too few arguments");
3744 oberon_error(ctx
, "too mach arguments");
3747 oberon_expr_t
* arg
;
3750 if(!arg
-> is_item
|| arg
-> item
.mode
!= MODE_TYPE
)
3752 oberon_error(ctx
, "SIZE accept only type");
3756 oberon_expr_t
* expr
;
3757 oberon_type_t
* type
= arg
-> result
;
3758 switch(type
-> class)
3760 case OBERON_TYPE_INTEGER
:
3761 case OBERON_TYPE_BOOLEAN
:
3762 case OBERON_TYPE_REAL
:
3763 case OBERON_TYPE_CHAR
:
3764 case OBERON_TYPE_SET
:
3765 size
= type
-> size
;
3768 oberon_error(ctx
, "TODO SIZE");
3772 expr
= oberon_make_integer(ctx
, size
);
3776 static oberon_expr_t
*
3777 oberon_make_abs_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3781 oberon_error(ctx
, "too few arguments");
3786 oberon_error(ctx
, "too mach arguments");
3789 oberon_expr_t
* arg
;
3791 oberon_check_src(ctx
, arg
);
3793 oberon_type_t
* result_type
;
3794 result_type
= arg
-> result
;
3796 if(result_type
-> class != OBERON_TYPE_INTEGER
)
3798 oberon_error(ctx
, "ABS accepts only integers");
3801 oberon_expr_t
* expr
;
3802 expr
= oberon_new_operator(OP_ABS
, result_type
, arg
, NULL
);
3807 oberon_make_new_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3811 oberon_error(ctx
, "too few arguments");
3814 oberon_expr_t
* dst
;
3816 oberon_check_dst(ctx
, dst
);
3818 oberon_type_t
* type
;
3819 type
= dst
-> result
;
3821 if(type
-> class != OBERON_TYPE_POINTER
)
3823 oberon_error(ctx
, "not a pointer");
3826 type
= type
-> base
;
3828 oberon_expr_t
* src
;
3829 src
= oberon_new_item(MODE_NEW
, dst
-> result
, 0);
3830 src
-> item
.num_args
= 0;
3831 src
-> item
.args
= NULL
;
3834 if(type
-> class == OBERON_TYPE_ARRAY
)
3836 if(type
-> size
== 0)
3838 oberon_type_t
* x
= type
;
3839 while(x
-> class == OBERON_TYPE_ARRAY
)
3849 if(num_args
< max_args
)
3851 oberon_error(ctx
, "too few arguments");
3854 if(num_args
> max_args
)
3856 oberon_error(ctx
, "too mach arguments");
3859 int num_sizes
= max_args
- 1;
3860 oberon_expr_t
* size_list
= list_args
-> next
;
3862 oberon_expr_t
* arg
= size_list
;
3863 for(int i
= 0; i
< max_args
- 1; i
++)
3865 oberon_check_src(ctx
, arg
);
3866 if(arg
-> result
-> class != OBERON_TYPE_INTEGER
)
3868 oberon_error(ctx
, "size must be integer");
3873 src
-> item
.num_args
= num_sizes
;
3874 src
-> item
.args
= size_list
;
3876 else if(type
-> class != OBERON_TYPE_RECORD
)
3878 oberon_error(ctx
, "oberon_make_new_call: wat");
3881 if(num_args
> max_args
)
3883 oberon_error(ctx
, "too mach arguments");
3886 oberon_assign(ctx
, src
, dst
);
3890 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3894 oberon_error(ctx
, "too few arguments");
3899 oberon_error(ctx
, "too mach arguments");
3902 oberon_expr_t
* src
;
3904 oberon_check_src(ctx
, src
);
3906 oberon_expr_t
* dst
;
3907 dst
= list_args
-> next
;
3908 oberon_check_dst(ctx
, dst
);
3910 if(!oberon_is_string_type(src
-> result
) && !oberon_is_array_of_char_type(src
-> result
))
3912 oberon_error(ctx
, "source must be string or array of char");
3915 if(!oberon_is_array_of_char_type(dst
-> result
))
3917 oberon_error(ctx
, "dst must be array of char");
3920 oberon_generate_copy(ctx
, src
, dst
);
3924 oberon_make_assert_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3928 oberon_error(ctx
, "too few arguments");
3933 oberon_error(ctx
, "too mach arguments");
3936 oberon_expr_t
* cond
;
3938 oberon_check_src(ctx
, cond
);
3940 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3942 oberon_error(ctx
, "expected boolean");
3947 oberon_generate_assert(ctx
, cond
);
3951 oberon_expr_t
* num
;
3952 num
= list_args
-> next
;
3953 oberon_check_src(ctx
, num
);
3955 if(num
-> result
-> class != OBERON_TYPE_INTEGER
)
3957 oberon_error(ctx
, "expected integer");
3960 oberon_check_const(ctx
, num
);
3962 oberon_generate_assert_n(ctx
, cond
, num
-> item
.integer
);
3967 oberon_make_halt_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3971 oberon_error(ctx
, "too few arguments");
3976 oberon_error(ctx
, "too mach arguments");
3979 oberon_expr_t
* num
;
3981 oberon_check_src(ctx
, num
);
3983 if(num
-> result
-> class != OBERON_TYPE_INTEGER
)
3985 oberon_error(ctx
, "expected integer");
3988 oberon_check_const(ctx
, num
);
3990 oberon_generate_halt(ctx
, num
-> item
.integer
);
3994 oberon_new_const(oberon_context_t
* ctx
, char * name
, oberon_expr_t
* expr
)
3996 oberon_object_t
* constant
;
3997 constant
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_CONST
, true, false, false);
3998 oberon_check_const(ctx
, expr
);
3999 constant
-> value
= (oberon_item_t
*) expr
;
4003 oberon_create_context(ModuleImportCallback import_module
)
4005 oberon_context_t
* ctx
= calloc(1, sizeof *ctx
);
4007 oberon_scope_t
* world_scope
;
4008 world_scope
= oberon_open_scope(ctx
);
4009 ctx
-> world_scope
= world_scope
;
4011 ctx
-> import_module
= import_module
;
4013 oberon_generator_init_context(ctx
);
4015 register_default_types(ctx
);
4018 oberon_new_const(ctx
, "TRUE", oberon_make_boolean(ctx
, true));
4019 oberon_new_const(ctx
, "FALSE", oberon_make_boolean(ctx
, false));
4022 oberon_new_intrinsic(ctx
, "ABS", oberon_make_abs_call
, NULL
);
4023 oberon_new_intrinsic(ctx
, "MIN", oberon_make_min_call
, NULL
);
4024 oberon_new_intrinsic(ctx
, "MAX", oberon_make_max_call
, NULL
);
4025 oberon_new_intrinsic(ctx
, "SIZE", oberon_make_size_call
, NULL
);
4028 oberon_new_intrinsic(ctx
, "NEW", NULL
, oberon_make_new_call
);
4029 oberon_new_intrinsic(ctx
, "COPY", NULL
, oberon_make_copy_call
);
4030 oberon_new_intrinsic(ctx
, "ASSERT", NULL
, oberon_make_assert_call
);
4031 oberon_new_intrinsic(ctx
, "HALT", NULL
, oberon_make_halt_call
);
4037 oberon_destroy_context(oberon_context_t
* ctx
)
4039 oberon_generator_destroy_context(ctx
);
4044 oberon_compile_module(oberon_context_t
* ctx
, const char * newcode
)
4046 const char * code
= ctx
-> code
;
4047 int code_index
= ctx
-> code_index
;
4049 int token
= ctx
-> token
;
4050 char * string
= ctx
-> string
;
4051 int integer
= ctx
-> integer
;
4052 int real
= ctx
-> real
;
4053 bool longmode
= ctx
-> longmode
;
4054 oberon_scope_t
* decl
= ctx
-> decl
;
4055 oberon_module_t
* mod
= ctx
-> mod
;
4057 oberon_scope_t
* module_scope
;
4058 module_scope
= oberon_open_scope(ctx
);
4060 oberon_module_t
* module
;
4061 module
= calloc(1, sizeof *module
);
4062 module
-> decl
= module_scope
;
4063 module
-> next
= ctx
-> module_list
;
4065 ctx
-> mod
= module
;
4066 ctx
-> module_list
= module
;
4068 oberon_init_scaner(ctx
, newcode
);
4069 oberon_parse_module(ctx
);
4071 module
-> ready
= 1;
4074 ctx
-> code_index
= code_index
;
4076 ctx
-> token
= token
;
4077 ctx
-> string
= string
;
4078 ctx
-> integer
= integer
;
4080 ctx
-> longmode
= longmode
;