10 #include "../include/oberon.h"
12 #include "oberon-internals.h"
13 #include "generator.h"
86 // =======================================================================
88 // =======================================================================
91 oberon_error(oberon_context_t
* ctx
, const char * fmt
, ...)
95 fprintf(stderr
, "error: ");
96 vfprintf(stderr
, fmt
, ptr
);
97 fprintf(stderr
, "\n");
98 fprintf(stderr
, " code_index = %i\n", ctx
-> code_index
);
99 fprintf(stderr
, " c = %c\n", ctx
-> c
);
100 fprintf(stderr
, " token = %i\n", ctx
-> token
);
105 static oberon_type_t
*
106 oberon_new_type_ptr(int class)
108 oberon_type_t
* x
= malloc(sizeof *x
);
109 memset(x
, 0, sizeof *x
);
114 static oberon_type_t
*
115 oberon_new_type_integer(int size
)
118 x
= oberon_new_type_ptr(OBERON_TYPE_INTEGER
);
123 static oberon_type_t
*
124 oberon_new_type_boolean()
127 x
= oberon_new_type_ptr(OBERON_TYPE_BOOLEAN
);
131 static oberon_type_t
*
132 oberon_new_type_real(int size
)
135 x
= oberon_new_type_ptr(OBERON_TYPE_REAL
);
140 static oberon_type_t
*
141 oberon_new_type_char(int size
)
144 x
= oberon_new_type_ptr(OBERON_TYPE_CHAR
);
149 static oberon_type_t
*
150 oberon_new_type_string(int size
)
153 x
= oberon_new_type_ptr(OBERON_TYPE_STRING
);
158 static oberon_type_t
*
159 oberon_new_type_set(int size
)
162 x
= oberon_new_type_ptr(OBERON_TYPE_SET
);
167 // =======================================================================
169 // =======================================================================
171 static oberon_scope_t
*
172 oberon_open_scope(oberon_context_t
* ctx
)
174 oberon_scope_t
* scope
= calloc(1, sizeof *scope
);
175 oberon_object_t
* list
= calloc(1, sizeof *list
);
178 scope
-> list
= list
;
179 scope
-> up
= ctx
-> decl
;
183 scope
-> local
= scope
-> up
-> local
;
184 scope
-> parent
= scope
-> up
-> parent
;
185 scope
-> parent_type
= scope
-> up
-> parent_type
;
186 scope
-> exit_label
= scope
-> up
-> exit_label
;
194 oberon_close_scope(oberon_scope_t
* scope
)
196 oberon_context_t
* ctx
= scope
-> ctx
;
197 ctx
-> decl
= scope
-> up
;
200 static oberon_object_t
*
201 oberon_find_object_in_list(oberon_object_t
* list
, char * name
)
203 oberon_object_t
* x
= list
;
204 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
211 static oberon_object_t
*
212 oberon_find_object(oberon_scope_t
* scope
, char * name
, bool check_it
)
214 oberon_object_t
* result
= NULL
;
216 oberon_scope_t
* s
= scope
;
217 while(result
== NULL
&& s
!= NULL
)
219 result
= oberon_find_object_in_list(s
-> list
, name
);
223 if(check_it
&& result
== NULL
)
225 oberon_error(scope
-> ctx
, "undefined ident %s", name
);
231 static oberon_object_t
*
232 oberon_create_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
)
234 oberon_object_t
* newvar
= malloc(sizeof *newvar
);
235 memset(newvar
, 0, sizeof *newvar
);
236 newvar
-> name
= name
;
237 newvar
-> class = class;
238 newvar
-> export
= export
;
239 newvar
-> read_only
= read_only
;
240 newvar
-> local
= scope
-> local
;
241 newvar
-> parent
= scope
-> parent
;
242 newvar
-> parent_type
= scope
-> parent_type
;
243 newvar
-> module
= scope
-> ctx
-> mod
;
247 static oberon_object_t
*
248 oberon_define_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
, bool check_upscope
)
252 if(oberon_find_object(scope
-> up
, name
, false))
254 oberon_error(scope
-> ctx
, "already defined");
258 oberon_object_t
* x
= scope
-> list
;
259 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
266 oberon_error(scope
-> ctx
, "already defined");
269 oberon_object_t
* newvar
;
270 newvar
= oberon_create_object(scope
, name
, class, export
, read_only
);
276 static oberon_object_t
*
277 oberon_define_type(oberon_scope_t
* scope
, char * name
, oberon_type_t
* type
, int export
)
279 oberon_object_t
* id
;
280 id
= oberon_define_object(scope
, name
, OBERON_CLASS_TYPE
, export
, false, false);
282 oberon_generator_init_type(scope
-> ctx
, type
);
286 // =======================================================================
288 // =======================================================================
291 oberon_get_char(oberon_context_t
* ctx
)
293 if(ctx
-> code
[ctx
-> code_index
])
295 ctx
-> code_index
+= 1;
296 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
301 oberon_init_scaner(oberon_context_t
* ctx
, const char * code
)
304 ctx
-> code_index
= 0;
305 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
309 oberon_read_ident(oberon_context_t
* ctx
)
312 int i
= ctx
-> code_index
;
314 int c
= ctx
-> code
[i
];
322 char * ident
= malloc(len
+ 1);
323 memcpy(ident
, &ctx
->code
[ctx
->code_index
], len
);
326 ctx
-> code_index
= i
;
327 ctx
-> c
= ctx
-> code
[i
];
328 ctx
-> string
= ident
;
329 ctx
-> token
= IDENT
;
331 if(strcmp(ident
, "MODULE") == 0)
333 ctx
-> token
= MODULE
;
335 else if(strcmp(ident
, "END") == 0)
339 else if(strcmp(ident
, "VAR") == 0)
343 else if(strcmp(ident
, "BEGIN") == 0)
345 ctx
-> token
= BEGIN
;
347 else if(strcmp(ident
, "TRUE") == 0)
351 else if(strcmp(ident
, "FALSE") == 0)
353 ctx
-> token
= FALSE
;
355 else if(strcmp(ident
, "OR") == 0)
359 else if(strcmp(ident
, "DIV") == 0)
363 else if(strcmp(ident
, "MOD") == 0)
367 else if(strcmp(ident
, "PROCEDURE") == 0)
369 ctx
-> token
= PROCEDURE
;
371 else if(strcmp(ident
, "RETURN") == 0)
373 ctx
-> token
= RETURN
;
375 else if(strcmp(ident
, "CONST") == 0)
377 ctx
-> token
= CONST
;
379 else if(strcmp(ident
, "TYPE") == 0)
383 else if(strcmp(ident
, "ARRAY") == 0)
385 ctx
-> token
= ARRAY
;
387 else if(strcmp(ident
, "OF") == 0)
391 else if(strcmp(ident
, "RECORD") == 0)
393 ctx
-> token
= RECORD
;
395 else if(strcmp(ident
, "POINTER") == 0)
397 ctx
-> token
= POINTER
;
399 else if(strcmp(ident
, "TO") == 0)
403 else if(strcmp(ident
, "NIL") == 0)
407 else if(strcmp(ident
, "IMPORT") == 0)
409 ctx
-> token
= IMPORT
;
411 else if(strcmp(ident
, "IN") == 0)
415 else if(strcmp(ident
, "IS") == 0)
419 else if(strcmp(ident
, "IF") == 0)
423 else if(strcmp(ident
, "THEN") == 0)
427 else if(strcmp(ident
, "ELSE") == 0)
431 else if(strcmp(ident
, "ELSIF") == 0)
433 ctx
-> token
= ELSIF
;
435 else if(strcmp(ident
, "WHILE") == 0)
437 ctx
-> token
= WHILE
;
439 else if(strcmp(ident
, "DO") == 0)
443 else if(strcmp(ident
, "REPEAT") == 0)
445 ctx
-> token
= REPEAT
;
447 else if(strcmp(ident
, "UNTIL") == 0)
449 ctx
-> token
= UNTIL
;
451 else if(strcmp(ident
, "FOR") == 0)
455 else if(strcmp(ident
, "BY") == 0)
459 else if(strcmp(ident
, "LOOP") == 0)
463 else if(strcmp(ident
, "EXIT") == 0)
467 else if(strcmp(ident
, "CASE") == 0)
471 else if(strcmp(ident
, "WITH") == 0)
478 oberon_read_number(oberon_context_t
* ctx
)
491 * mode = 3 == LONGREAL
495 start_i
= ctx
-> code_index
;
497 while(isdigit(ctx
-> c
))
499 oberon_get_char(ctx
);
502 end_i
= ctx
-> code_index
;
504 if(isxdigit(ctx
-> c
))
507 while(isxdigit(ctx
-> c
))
509 oberon_get_char(ctx
);
512 end_i
= ctx
-> code_index
;
517 oberon_get_char(ctx
);
519 else if(ctx
-> c
== 'X')
522 oberon_get_char(ctx
);
526 oberon_error(ctx
, "invalid hex number");
529 else if(ctx
-> c
== '.')
531 oberon_get_char(ctx
);
534 /* Чит: избегаем конфликта с DOTDOT */
535 ctx
-> code_index
-= 1;
541 while(isdigit(ctx
-> c
))
543 oberon_get_char(ctx
);
546 if(ctx
-> c
== 'E' || ctx
-> c
== 'D')
548 exp_i
= ctx
-> code_index
;
555 oberon_get_char(ctx
);
557 if(ctx
-> c
== '+' || ctx
-> c
== '-')
559 oberon_get_char(ctx
);
562 while(isdigit(ctx
-> c
))
564 oberon_get_char(ctx
);
568 end_i
= ctx
-> code_index
;
576 oberon_get_char(ctx
);
578 else if(ctx
-> c
== 'X')
581 oberon_get_char(ctx
);
585 int len
= end_i
- start_i
;
586 ident
= malloc(len
+ 1);
587 memcpy(ident
, &ctx
-> code
[start_i
], len
);
590 ctx
-> longmode
= false;
593 int i
= exp_i
- start_i
;
595 ctx
-> longmode
= true;
601 integer
= atol(ident
);
603 ctx
-> token
= INTEGER
;
606 sscanf(ident
, "%lx", &integer
);
608 ctx
-> token
= INTEGER
;
612 sscanf(ident
, "%lf", &real
);
616 sscanf(ident
, "%lx", &integer
);
621 oberon_error(ctx
, "oberon_read_number: wat");
625 ctx
-> string
= ident
;
626 ctx
-> integer
= integer
;
631 oberon_skip_space(oberon_context_t
* ctx
)
633 while(isspace(ctx
-> c
))
635 oberon_get_char(ctx
);
640 oberon_read_comment(oberon_context_t
* ctx
)
647 oberon_get_char(ctx
);
650 oberon_get_char(ctx
);
654 else if(ctx
-> c
== '*')
656 oberon_get_char(ctx
);
659 oberon_get_char(ctx
);
663 else if(ctx
-> c
== 0)
665 oberon_error(ctx
, "unterminated comment");
669 oberon_get_char(ctx
);
674 static void oberon_read_string(oberon_context_t
* ctx
)
677 oberon_get_char(ctx
);
679 int start
= ctx
-> code_index
;
681 while(ctx
-> c
!= 0 && ctx
-> c
!= c
)
683 oberon_get_char(ctx
);
688 oberon_error(ctx
, "unterminated string");
691 int end
= ctx
-> code_index
;
693 oberon_get_char(ctx
);
695 char * string
= calloc(1, end
- start
+ 1);
696 strncpy(string
, &ctx
-> code
[start
], end
- start
);
698 ctx
-> token
= STRING
;
699 ctx
-> string
= string
;
701 printf("oberon_read_string: string ((%s))\n", string
);
704 static void oberon_read_token(oberon_context_t
* ctx
);
707 oberon_read_symbol(oberon_context_t
* ctx
)
716 ctx
-> token
= SEMICOLON
;
717 oberon_get_char(ctx
);
720 ctx
-> token
= COLON
;
721 oberon_get_char(ctx
);
724 ctx
-> token
= ASSIGN
;
725 oberon_get_char(ctx
);
730 oberon_get_char(ctx
);
733 ctx
-> token
= DOTDOT
;
734 oberon_get_char(ctx
);
738 ctx
-> token
= LPAREN
;
739 oberon_get_char(ctx
);
742 oberon_get_char(ctx
);
743 oberon_read_comment(ctx
);
744 oberon_read_token(ctx
);
748 ctx
-> token
= RPAREN
;
749 oberon_get_char(ctx
);
752 ctx
-> token
= EQUAL
;
753 oberon_get_char(ctx
);
757 oberon_get_char(ctx
);
761 oberon_get_char(ctx
);
765 oberon_get_char(ctx
);
769 ctx
-> token
= GREAT
;
770 oberon_get_char(ctx
);
774 oberon_get_char(ctx
);
779 oberon_get_char(ctx
);
782 ctx
-> token
= MINUS
;
783 oberon_get_char(ctx
);
787 oberon_get_char(ctx
);
790 oberon_get_char(ctx
);
791 oberon_error(ctx
, "unstarted comment");
795 ctx
-> token
= SLASH
;
796 oberon_get_char(ctx
);
800 oberon_get_char(ctx
);
804 oberon_get_char(ctx
);
807 ctx
-> token
= COMMA
;
808 oberon_get_char(ctx
);
811 ctx
-> token
= LBRACK
;
812 oberon_get_char(ctx
);
815 ctx
-> token
= RBRACK
;
816 oberon_get_char(ctx
);
819 ctx
-> token
= UPARROW
;
820 oberon_get_char(ctx
);
823 oberon_read_string(ctx
);
826 oberon_read_string(ctx
);
829 ctx
-> token
= LBRACE
;
830 oberon_get_char(ctx
);
833 ctx
-> token
= RBRACE
;
834 oberon_get_char(ctx
);
838 oberon_get_char(ctx
);
841 oberon_error(ctx
, "invalid char %c", ctx
-> c
);
847 oberon_read_token(oberon_context_t
* ctx
)
849 oberon_skip_space(ctx
);
854 oberon_read_ident(ctx
);
858 oberon_read_number(ctx
);
862 oberon_read_symbol(ctx
);
866 // =======================================================================
868 // =======================================================================
870 static void oberon_expect_token(oberon_context_t
* ctx
, int token
);
871 static oberon_expr_t
* oberon_expr(oberon_context_t
* ctx
);
872 static void oberon_assert_token(oberon_context_t
* ctx
, int token
);
873 static char * oberon_assert_ident(oberon_context_t
* ctx
);
874 static void oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
);
875 static oberon_item_t
* oberon_const_expr(oberon_context_t
* ctx
);
876 static oberon_expr_t
* oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
);
878 static oberon_expr_t
*
879 oberon_new_operator(int op
, oberon_type_t
* result
, oberon_expr_t
* left
, oberon_expr_t
* right
)
881 oberon_oper_t
* operator;
882 operator = malloc(sizeof *operator);
883 memset(operator, 0, sizeof *operator);
885 operator -> is_item
= 0;
886 operator -> result
= result
;
887 operator -> read_only
= 1;
889 operator -> left
= left
;
890 operator -> right
= right
;
892 return (oberon_expr_t
*) operator;
895 static oberon_expr_t
*
896 oberon_new_item(int mode
, oberon_type_t
* result
, int read_only
)
898 oberon_item_t
* item
;
899 item
= malloc(sizeof *item
);
900 memset(item
, 0, sizeof *item
);
903 item
-> result
= result
;
904 item
-> read_only
= read_only
;
907 return (oberon_expr_t
*)item
;
910 static oberon_expr_t
*
911 oberon_make_unary_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
)
913 oberon_expr_t
* expr
;
914 oberon_type_t
* result
;
916 result
= a
-> result
;
920 if(result
-> class == OBERON_TYPE_SET
)
922 expr
= oberon_new_operator(OP_COMPLEMENTATION
, result
, a
, NULL
);
924 else if(result
-> class == OBERON_TYPE_INTEGER
)
926 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
930 oberon_error(ctx
, "incompatible operator type");
933 else if(token
== NOT
)
935 if(result
-> class != OBERON_TYPE_BOOLEAN
)
937 oberon_error(ctx
, "incompatible operator type");
940 expr
= oberon_new_operator(OP_LOGIC_NOT
, result
, a
, NULL
);
944 oberon_error(ctx
, "oberon_make_unary_op: wat");
951 oberon_expr_list(oberon_context_t
* ctx
, int * num_expr
, oberon_expr_t
** first
, int const_expr
)
953 oberon_expr_t
* last
;
958 *first
= last
= (oberon_expr_t
*) oberon_const_expr(ctx
);
962 *first
= last
= oberon_expr(ctx
);
964 while(ctx
-> token
== COMMA
)
966 oberon_assert_token(ctx
, COMMA
);
967 oberon_expr_t
* current
;
971 current
= (oberon_expr_t
*) oberon_const_expr(ctx
);
975 current
= oberon_expr(ctx
);
978 last
-> next
= current
;
984 static oberon_expr_t
*
985 oberon_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
987 return oberon_new_operator(OP_CAST
, pref
, expr
, NULL
);
990 static oberon_expr_t
*
991 oberno_make_record_cast(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* rec
)
993 oberon_type_t
* from
= expr
-> result
;
994 oberon_type_t
* to
= rec
;
996 printf("oberno_make_record_cast: from class %i to class %i\n", from
-> class, to
-> class);
998 if(from
-> class == OBERON_TYPE_POINTER
&& to
-> class == OBERON_TYPE_POINTER
)
1000 printf("oberno_make_record_cast: pointers\n");
1001 from
= from
-> base
;
1005 if(from
-> class != OBERON_TYPE_RECORD
|| to
-> class != OBERON_TYPE_RECORD
)
1007 oberon_error(ctx
, "must be record type");
1010 return oberon_cast_expr(ctx
, expr
, rec
);
1013 static oberon_type_t
*
1014 oberon_get_equal_expr_type(oberon_context_t
* ctx
, oberon_type_t
* a
, oberon_type_t
* b
)
1016 oberon_type_t
* result
;
1017 if(a
-> class == OBERON_TYPE_REAL
&& b
-> class == OBERON_TYPE_INTEGER
)
1021 else if(b
-> class == OBERON_TYPE_REAL
&& a
-> class == OBERON_TYPE_INTEGER
)
1025 else if(a
-> class != b
-> class)
1027 oberon_error(ctx
, "oberon_get_equal_expr_type: incompatible types");
1029 else if(a
-> size
> b
-> size
)
1042 oberon_check_record_compatibility(oberon_context_t
* ctx
, oberon_type_t
* from
, oberon_type_t
* to
)
1044 if(from
-> class == OBERON_TYPE_POINTER
&& to
-> class == OBERON_TYPE_POINTER
)
1046 from
= from
-> base
;
1050 if(from
-> class != OBERON_TYPE_RECORD
|| to
-> class != OBERON_TYPE_RECORD
)
1052 oberon_error(ctx
, "not a record");
1055 oberon_type_t
* t
= from
;
1056 while(t
!= NULL
&& t
!= to
)
1063 oberon_error(ctx
, "incompatible record types");
1068 oberon_check_dst(oberon_context_t
* ctx
, oberon_expr_t
* dst
)
1070 if(dst
-> is_item
== false)
1072 oberon_error(ctx
, "not variable");
1075 switch(dst
-> item
.mode
)
1086 oberon_error(ctx
, "not variable");
1092 oberon_check_src(oberon_context_t
* ctx
, oberon_expr_t
* src
)
1096 if(src
-> item
.mode
== MODE_TYPE
)
1098 oberon_error(ctx
, "not variable");
1103 static oberon_expr_t
*
1104 oberon_autocast_to(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1107 // Если классы типов равны
1108 // Если INTEGER переводится в REAL
1109 // Есди STRING переводится в ARRAY OF CHAR
1111 oberon_check_src(ctx
, expr
);
1114 if(pref
-> class != expr
-> result
-> class)
1116 printf("expr class %i\n", expr
-> result
-> class);
1117 printf("pref class %i\n", pref
-> class);
1119 if(expr
-> result
-> class == OBERON_TYPE_STRING
)
1121 if(pref
-> class == OBERON_TYPE_ARRAY
)
1123 if(pref
-> base
-> class != OBERON_TYPE_CHAR
)
1133 else if(expr
-> result
-> class == OBERON_TYPE_INTEGER
)
1135 if(pref
-> class != OBERON_TYPE_REAL
)
1148 oberon_error(ctx
, "oberon_autocast_to: incompatible types");
1151 if(pref
-> class == OBERON_TYPE_INTEGER
|| pref
-> class == OBERON_TYPE_REAL
)
1153 if(expr
-> result
-> size
> pref
-> size
)
1155 oberon_error(ctx
, "incompatible size");
1159 expr
= oberon_cast_expr(ctx
, expr
, pref
);
1162 else if(pref
-> class == OBERON_TYPE_RECORD
)
1164 oberon_check_record_compatibility(ctx
, expr
-> result
, pref
);
1165 expr
= oberno_make_record_cast(ctx
, expr
, pref
);
1167 else if(pref
-> class == OBERON_TYPE_POINTER
)
1169 assert(pref
-> base
);
1170 if(expr
-> result
-> base
-> class == OBERON_TYPE_RECORD
)
1172 oberon_check_record_compatibility(ctx
, expr
-> result
, pref
);
1173 expr
= oberno_make_record_cast(ctx
, expr
, pref
);
1175 else if(expr
-> result
-> base
!= pref
-> base
)
1177 if(expr
-> result
-> base
-> class != OBERON_TYPE_VOID
)
1179 oberon_error(ctx
, "incompatible pointer types");
1188 oberon_autocast_binary_op(oberon_context_t
* ctx
, oberon_expr_t
** ea
, oberon_expr_t
** eb
)
1190 oberon_type_t
* a
= (*ea
) -> result
;
1191 oberon_type_t
* b
= (*eb
) -> result
;
1192 oberon_type_t
* preq
= oberon_get_equal_expr_type(ctx
, a
, b
);
1193 *ea
= oberon_autocast_to(ctx
, *ea
, preq
);
1194 *eb
= oberon_autocast_to(ctx
, *eb
, preq
);
1198 oberon_autocast_call(oberon_context_t
* ctx
, oberon_item_t
* desig
)
1200 if(desig
-> mode
!= MODE_CALL
)
1202 oberon_error(ctx
, "expected mode CALL");
1205 oberon_type_t
* fn
= desig
-> parent
-> result
;
1206 int num_args
= desig
-> num_args
;
1207 int num_decl
= fn
-> num_decl
;
1209 if(num_args
< num_decl
)
1211 oberon_error(ctx
, "too few arguments");
1213 else if(num_args
> num_decl
)
1215 oberon_error(ctx
, "too many arguments");
1218 /* Делаем проверку на запись и делаем автокаст */
1219 oberon_expr_t
* casted
[num_args
];
1220 oberon_expr_t
* arg
= desig
-> args
;
1221 oberon_object_t
* param
= fn
-> decl
;
1222 for(int i
= 0; i
< num_args
; i
++)
1224 if(param
-> class == OBERON_CLASS_VAR_PARAM
)
1226 if(arg
-> result
!= param
-> type
)
1228 oberon_error(ctx
, "incompatible type");
1230 if(arg
-> read_only
)
1232 oberon_error(ctx
, "assign to read-only var");
1238 casted
[i
] = oberon_autocast_to(ctx
, arg
, param
-> type
);
1242 param
= param
-> next
;
1245 /* Создаём новый список выражений */
1249 for(int i
= 0; i
< num_args
- 1; i
++)
1251 casted
[i
] -> next
= casted
[i
+ 1];
1253 desig
-> args
= arg
;
1257 static oberon_expr_t
*
1258 oberon_make_call_func(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1260 oberon_type_t
* signature
= item
-> result
;
1261 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1263 oberon_error(ctx
, "not a procedure");
1266 oberon_expr_t
* call
;
1268 if(signature
-> sysproc
)
1270 if(signature
-> genfunc
== NULL
)
1272 oberon_error(ctx
, "not a function-procedure");
1275 call
= signature
-> genfunc(ctx
, num_args
, list_args
);
1279 if(signature
-> base
-> class == OBERON_TYPE_VOID
)
1281 oberon_error(ctx
, "attempt to call procedure in expression");
1284 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1285 call
-> item
.parent
= item
;
1286 call
-> item
.num_args
= num_args
;
1287 call
-> item
.args
= list_args
;
1288 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1295 oberon_make_call_proc(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1297 oberon_type_t
* signature
= item
-> result
;
1298 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1300 oberon_error(ctx
, "not a procedure");
1303 oberon_expr_t
* call
;
1305 if(signature
-> sysproc
)
1307 if(signature
-> genproc
== NULL
)
1309 oberon_error(ctx
, "not a procedure");
1312 signature
-> genproc(ctx
, num_args
, list_args
);
1316 if(signature
-> base
-> class != OBERON_TYPE_VOID
)
1318 oberon_error(ctx
, "attempt to call function as non-typed procedure");
1321 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1322 call
-> item
.parent
= item
;
1323 call
-> item
.num_args
= num_args
;
1324 call
-> item
.args
= list_args
;
1325 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1326 oberon_generate_call_proc(ctx
, call
);
1334 || ((x) == INTEGER) \
1337 || ((x) == STRING) \
1339 || ((x) == LPAREN) \
1344 static oberon_expr_t
*
1345 oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1347 printf("oberno_make_dereferencing\n");
1348 if(expr
-> result
-> class != OBERON_TYPE_POINTER
)
1350 oberon_error(ctx
, "not a pointer");
1353 assert(expr
-> is_item
);
1355 oberon_expr_t
* selector
;
1356 selector
= oberon_new_item(MODE_DEREF
, expr
-> result
-> base
, expr
-> read_only
);
1357 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1362 static oberon_expr_t
*
1363 oberon_make_array_selector(oberon_context_t
* ctx
, oberon_expr_t
* desig
, oberon_expr_t
* index
)
1365 if(desig
-> result
-> class == OBERON_TYPE_POINTER
)
1367 desig
= oberno_make_dereferencing(ctx
, desig
);
1370 assert(desig
-> is_item
);
1372 if(desig
-> result
-> class != OBERON_TYPE_ARRAY
)
1374 oberon_error(ctx
, "not array");
1377 oberon_type_t
* base
;
1378 base
= desig
-> result
-> base
;
1380 if(index
-> result
-> class != OBERON_TYPE_INTEGER
)
1382 oberon_error(ctx
, "index must be integer");
1385 // Статическая проверка границ массива
1386 if(desig
-> result
-> size
!= 0)
1388 if(index
-> is_item
)
1390 if(index
-> item
.mode
== MODE_INTEGER
)
1392 int arr_size
= desig
-> result
-> size
;
1393 int index_int
= index
-> item
.integer
;
1394 if(index_int
< 0 || index_int
> arr_size
- 1)
1396 oberon_error(ctx
, "not in range (dimension size 0..%i)", arr_size
- 1);
1402 oberon_expr_t
* selector
;
1403 selector
= oberon_new_item(MODE_INDEX
, base
, desig
-> read_only
);
1404 selector
-> item
.parent
= (oberon_item_t
*) desig
;
1405 selector
-> item
.num_args
= 1;
1406 selector
-> item
.args
= index
;
1411 static oberon_expr_t
*
1412 oberon_make_record_selector(oberon_context_t
* ctx
, oberon_expr_t
* expr
, char * name
)
1414 if(expr
-> result
-> class == OBERON_TYPE_POINTER
)
1416 expr
= oberno_make_dereferencing(ctx
, expr
);
1419 assert(expr
-> is_item
);
1421 if(expr
-> result
-> class != OBERON_TYPE_RECORD
)
1423 oberon_error(ctx
, "not record");
1426 oberon_type_t
* rec
= expr
-> result
;
1428 oberon_object_t
* field
;
1429 field
= oberon_find_object(rec
-> scope
, name
, true);
1431 if(field
-> export
== 0)
1433 if(field
-> module
!= ctx
-> mod
)
1435 oberon_error(ctx
, "field not exported");
1440 if(field
-> read_only
)
1442 if(field
-> module
!= ctx
-> mod
)
1448 oberon_expr_t
* selector
;
1449 selector
= oberon_new_item(MODE_FIELD
, field
-> type
, read_only
);
1450 selector
-> item
.var
= field
;
1451 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1456 #define ISSELECTOR(x) \
1459 || ((x) == UPARROW) \
1462 static oberon_object_t
*
1463 oberon_qualident(oberon_context_t
* ctx
, char ** xname
, int check
)
1466 oberon_object_t
* x
;
1468 name
= oberon_assert_ident(ctx
);
1469 x
= oberon_find_object(ctx
-> decl
, name
, check
);
1473 if(x
-> class == OBERON_CLASS_MODULE
)
1475 oberon_assert_token(ctx
, DOT
);
1476 name
= oberon_assert_ident(ctx
);
1477 /* Наличие объектов в левых модулях всегда проверяется */
1478 x
= oberon_find_object(x
-> module
-> decl
, name
, 1);
1480 if(x
-> export
== 0)
1482 oberon_error(ctx
, "not exported");
1495 static oberon_expr_t
*
1496 oberon_ident_item(oberon_context_t
* ctx
, char * name
)
1499 oberon_object_t
* x
;
1500 oberon_expr_t
* expr
;
1502 x
= oberon_find_object(ctx
-> decl
, name
, true);
1505 if(x
-> class == OBERON_CLASS_CONST
|| x
-> class == OBERON_CLASS_PROC
)
1510 expr
= oberon_new_item(MODE_VAR
, x
-> type
, read_only
);
1511 expr
-> item
.var
= x
;
1515 static oberon_expr_t
*
1516 oberon_qualident_expr(oberon_context_t
* ctx
)
1518 oberon_object_t
* var
;
1519 oberon_expr_t
* expr
;
1521 var
= oberon_qualident(ctx
, NULL
, 1);
1524 if(var
-> read_only
)
1526 if(var
-> module
!= ctx
-> mod
)
1532 switch(var
-> class)
1534 case OBERON_CLASS_CONST
:
1536 expr
= (oberon_expr_t
*) var
-> value
;
1538 case OBERON_CLASS_TYPE
:
1539 expr
= oberon_new_item(MODE_TYPE
, var
-> type
, read_only
);
1541 case OBERON_CLASS_VAR
:
1542 case OBERON_CLASS_VAR_PARAM
:
1543 case OBERON_CLASS_PARAM
:
1544 expr
= oberon_new_item(MODE_VAR
, var
-> type
, read_only
);
1546 case OBERON_CLASS_PROC
:
1547 expr
= oberon_new_item(MODE_VAR
, var
-> type
, true);
1550 oberon_error(ctx
, "invalid designator");
1554 expr
-> item
.var
= var
;
1559 static oberon_expr_t
*
1560 oberon_designator(oberon_context_t
* ctx
)
1563 oberon_expr_t
* expr
;
1565 expr
= oberon_qualident_expr(ctx
);
1567 while(expr
-> result
-> class != OBERON_TYPE_PROCEDURE
&& ISSELECTOR(ctx
-> token
))
1569 switch(ctx
-> token
)
1572 oberon_assert_token(ctx
, DOT
);
1573 name
= oberon_assert_ident(ctx
);
1574 expr
= oberon_make_record_selector(ctx
, expr
, name
);
1577 oberon_assert_token(ctx
, LBRACK
);
1578 int num_indexes
= 0;
1579 oberon_expr_t
* indexes
= NULL
;
1580 oberon_expr_list(ctx
, &num_indexes
, &indexes
, 0);
1581 oberon_assert_token(ctx
, RBRACK
);
1583 for(int i
= 0; i
< num_indexes
; i
++)
1585 expr
= oberon_make_array_selector(ctx
, expr
, indexes
);
1586 indexes
= indexes
-> next
;
1590 oberon_assert_token(ctx
, UPARROW
);
1591 expr
= oberno_make_dereferencing(ctx
, expr
);
1594 oberon_assert_token(ctx
, LPAREN
);
1595 oberon_object_t
* objtype
= oberon_qualident(ctx
, NULL
, 1);
1596 if(objtype
-> class != OBERON_CLASS_TYPE
)
1598 oberon_error(ctx
, "must be type");
1600 oberon_assert_token(ctx
, RPAREN
);
1601 expr
= oberno_make_record_cast(ctx
, expr
, objtype
-> type
);
1604 oberon_error(ctx
, "oberon_designator: wat");
1612 static oberon_expr_t
*
1613 oberon_opt_func_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1615 /* Если есть скобки - значит вызов. Если нет, то передаём указатель. */
1616 if(ctx
-> token
== LPAREN
)
1618 oberon_assert_token(ctx
, LPAREN
);
1621 oberon_expr_t
* arguments
= NULL
;
1623 if(ISEXPR(ctx
-> token
))
1625 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1628 assert(expr
-> is_item
== 1);
1629 expr
= oberon_make_call_func(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1631 oberon_assert_token(ctx
, RPAREN
);
1638 oberon_opt_proc_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1640 assert(expr
-> is_item
);
1643 oberon_expr_t
* arguments
= NULL
;
1645 if(ctx
-> token
== LPAREN
)
1647 oberon_assert_token(ctx
, LPAREN
);
1649 if(ISEXPR(ctx
-> token
))
1651 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1654 oberon_assert_token(ctx
, RPAREN
);
1657 /* Вызов происходит даже без скобок */
1658 oberon_make_call_proc(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1661 static oberon_type_t
*
1662 oberon_get_type_of_int_value(oberon_context_t
* ctx
, int64_t i
)
1664 if(i
>= -128 && i
<= 127)
1666 return ctx
-> byte_type
;
1668 else if(i
>= -32768 && i
<= 32767)
1670 return ctx
-> shortint_type
;
1672 else if(i
>= -2147483648 && i
<= 2147483647)
1674 return ctx
-> int_type
;
1678 return ctx
-> longint_type
;
1682 static oberon_expr_t
*
1683 oberon_integer_item(oberon_context_t
* ctx
, int64_t i
)
1685 oberon_expr_t
* expr
;
1686 oberon_type_t
* result
;
1687 result
= oberon_get_type_of_int_value(ctx
, i
);
1688 expr
= oberon_new_item(MODE_INTEGER
, result
, true);
1689 expr
-> item
.integer
= i
;
1693 static oberon_expr_t
*
1694 oberon_element(oberon_context_t
* ctx
)
1699 e1
= oberon_expr(ctx
);
1700 if(e1
-> result
-> class != OBERON_TYPE_INTEGER
)
1702 oberon_error(ctx
, "expected integer");
1706 if(ctx
-> token
== DOTDOT
)
1708 oberon_assert_token(ctx
, DOTDOT
);
1709 e2
= oberon_expr(ctx
);
1710 if(e2
-> result
-> class != OBERON_TYPE_INTEGER
)
1712 oberon_error(ctx
, "expected integer");
1716 oberon_expr_t
* set
;
1717 set
= oberon_new_operator(OP_RANGE
, ctx
-> set_type
, e1
, e2
);
1721 static oberon_expr_t
*
1722 oberon_set(oberon_context_t
* ctx
)
1724 oberon_expr_t
* set
;
1725 oberon_expr_t
* elements
;
1726 set
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
1727 set
-> item
.integer
= 0;
1729 oberon_assert_token(ctx
, LBRACE
);
1730 if(ISEXPR(ctx
-> token
))
1732 elements
= oberon_element(ctx
);
1733 set
= oberon_new_operator(OP_UNION
, ctx
-> set_type
, set
, elements
);
1734 while(ctx
-> token
== COMMA
)
1736 oberon_assert_token(ctx
, COMMA
);
1737 elements
= oberon_element(ctx
);
1738 set
= oberon_new_operator(OP_UNION
, ctx
-> set_type
, set
, elements
);
1741 oberon_assert_token(ctx
, RBRACE
);
1746 static oberon_expr_t
*
1747 oberon_factor(oberon_context_t
* ctx
)
1749 oberon_expr_t
* expr
;
1750 oberon_type_t
* result
;
1752 switch(ctx
-> token
)
1755 expr
= oberon_designator(ctx
);
1756 expr
= oberon_opt_func_parens(ctx
, expr
);
1759 expr
= oberon_integer_item(ctx
, ctx
-> integer
);
1760 oberon_assert_token(ctx
, INTEGER
);
1763 result
= ctx
-> char_type
;
1764 expr
= oberon_new_item(MODE_CHAR
, result
, true);
1765 expr
-> item
.integer
= ctx
-> integer
;
1766 oberon_assert_token(ctx
, CHAR
);
1769 result
= ctx
-> string_type
;
1770 expr
= oberon_new_item(MODE_STRING
, result
, true);
1771 expr
-> item
.string
= ctx
-> string
;
1772 oberon_assert_token(ctx
, STRING
);
1775 result
= (ctx
-> longmode
) ? (ctx
-> longreal_type
) : (ctx
-> real_type
);
1776 expr
= oberon_new_item(MODE_REAL
, result
, 1);
1777 expr
-> item
.real
= ctx
-> real
;
1778 oberon_assert_token(ctx
, REAL
);
1781 expr
= oberon_new_item(MODE_BOOLEAN
, ctx
-> bool_type
, true);
1782 expr
-> item
.boolean
= true;
1783 oberon_assert_token(ctx
, TRUE
);
1786 expr
= oberon_new_item(MODE_BOOLEAN
, ctx
-> bool_type
, true);
1787 expr
-> item
.boolean
= false;
1788 oberon_assert_token(ctx
, FALSE
);
1791 expr
= oberon_set(ctx
);
1794 oberon_assert_token(ctx
, LPAREN
);
1795 expr
= oberon_expr(ctx
);
1796 oberon_assert_token(ctx
, RPAREN
);
1799 oberon_assert_token(ctx
, NOT
);
1800 expr
= oberon_factor(ctx
);
1801 expr
= oberon_make_unary_op(ctx
, NOT
, expr
);
1804 oberon_assert_token(ctx
, NIL
);
1805 expr
= oberon_new_item(MODE_NIL
, ctx
-> void_ptr_type
, true);
1808 oberon_error(ctx
, "invalid expression");
1814 #define ITMAKESBOOLEAN(x) \
1815 (((x) >= EQUAL && (x) <= GEQ) || ((x) == OR) || ((x) == AND))
1817 #define ITUSEONLYINTEGER(x) \
1818 ((x) >= LESS && (x) <= GEQ)
1820 #define ITUSEONLYBOOLEAN(x) \
1821 (((x) == OR) || ((x) == AND))
1824 oberon_autocast_to_real(oberon_context_t
* ctx
, oberon_expr_t
** e
)
1826 oberon_expr_t
* expr
= *e
;
1827 if(expr
-> result
-> class == OBERON_TYPE_INTEGER
)
1829 if(expr
-> result
-> size
<= ctx
-> real_type
-> size
)
1831 *e
= oberon_cast_expr(ctx
, expr
, ctx
-> real_type
);
1835 *e
= oberon_cast_expr(ctx
, expr
, ctx
-> longreal_type
);
1838 else if(expr
-> result
-> class != OBERON_TYPE_REAL
)
1840 oberon_error(ctx
, "required numeric type");
1844 static oberon_expr_t
*
1845 oberon_make_bin_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1847 oberon_expr_t
* expr
;
1848 oberon_type_t
* result
;
1853 if(a
-> result
-> class != OBERON_TYPE_INTEGER
)
1855 oberon_error(ctx
, "must be integer");
1858 if(b
-> result
-> class != OBERON_TYPE_SET
)
1860 oberon_error(ctx
, "must be set");
1863 result
= ctx
-> bool_type
;
1864 expr
= oberon_new_operator(OP_IN
, result
, a
, b
);
1866 else if(token
== IS
)
1868 oberon_type_t
* v
= a
-> result
;
1869 if(v
-> class == OBERON_TYPE_POINTER
)
1872 if(v
-> class != OBERON_TYPE_RECORD
)
1874 oberon_error(ctx
, "must be record");
1877 else if(v
-> class != OBERON_TYPE_RECORD
)
1879 oberon_error(ctx
, "must be record");
1882 if(b
-> is_item
== false || b
-> item
.mode
!= MODE_TYPE
)
1884 oberon_error(ctx
, "requires type");
1887 oberon_type_t
* t
= b
-> result
;
1888 if(t
-> class == OBERON_TYPE_POINTER
)
1891 if(t
-> class != OBERON_TYPE_RECORD
)
1893 oberon_error(ctx
, "must be record");
1896 else if(t
-> class != OBERON_TYPE_RECORD
)
1898 oberon_error(ctx
, "must be record");
1901 result
= ctx
-> bool_type
;
1902 expr
= oberon_new_operator(OP_IS
, result
, a
, b
);
1904 else if(ITMAKESBOOLEAN(token
))
1906 if(ITUSEONLYINTEGER(token
))
1908 if(a
-> result
-> class == OBERON_TYPE_INTEGER
1909 || b
-> result
-> class == OBERON_TYPE_INTEGER
1910 || a
-> result
-> class == OBERON_TYPE_REAL
1911 || b
-> result
-> class == OBERON_TYPE_REAL
)
1917 oberon_error(ctx
, "used only with numeric types");
1920 else if(ITUSEONLYBOOLEAN(token
))
1922 if(a
-> result
-> class != OBERON_TYPE_BOOLEAN
1923 || b
-> result
-> class != OBERON_TYPE_BOOLEAN
)
1925 oberon_error(ctx
, "used only with boolean type");
1929 oberon_autocast_binary_op(ctx
, &a
, &b
);
1930 result
= ctx
-> bool_type
;
1934 expr
= oberon_new_operator(OP_EQ
, result
, a
, b
);
1936 else if(token
== NEQ
)
1938 expr
= oberon_new_operator(OP_NEQ
, result
, a
, b
);
1940 else if(token
== LESS
)
1942 expr
= oberon_new_operator(OP_LSS
, result
, a
, b
);
1944 else if(token
== LEQ
)
1946 expr
= oberon_new_operator(OP_LEQ
, result
, a
, b
);
1948 else if(token
== GREAT
)
1950 expr
= oberon_new_operator(OP_GRT
, result
, a
, b
);
1952 else if(token
== GEQ
)
1954 expr
= oberon_new_operator(OP_GEQ
, result
, a
, b
);
1956 else if(token
== OR
)
1958 expr
= oberon_new_operator(OP_LOGIC_OR
, result
, a
, b
);
1960 else if(token
== AND
)
1962 expr
= oberon_new_operator(OP_LOGIC_AND
, result
, a
, b
);
1966 oberon_error(ctx
, "oberon_make_bin_op: bool wat");
1969 else if(token
== SLASH
)
1971 if(a
-> result
-> class == OBERON_TYPE_SET
1972 || b
-> result
-> class == OBERON_TYPE_SET
)
1974 oberon_autocast_binary_op(ctx
, &a
, &b
);
1975 result
= a
-> result
;
1976 expr
= oberon_new_operator(OP_SYM_DIFFERENCE
, result
, a
, b
);
1980 oberon_autocast_to_real(ctx
, &a
);
1981 oberon_autocast_to_real(ctx
, &b
);
1982 oberon_autocast_binary_op(ctx
, &a
, &b
);
1983 result
= a
-> result
;
1984 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
1987 else if(token
== DIV
)
1989 if(a
-> result
-> class != OBERON_TYPE_INTEGER
1990 || b
-> result
-> class != OBERON_TYPE_INTEGER
)
1992 oberon_error(ctx
, "operator DIV requires integer type");
1995 oberon_autocast_binary_op(ctx
, &a
, &b
);
1996 expr
= oberon_new_operator(OP_DIV
, a
-> result
, a
, b
);
2000 oberon_autocast_binary_op(ctx
, &a
, &b
);
2001 result
= a
-> result
;
2002 if(result
-> class == OBERON_TYPE_SET
)
2007 expr
= oberon_new_operator(OP_UNION
, result
, a
, b
);
2010 expr
= oberon_new_operator(OP_DIFFERENCE
, result
, a
, b
);
2013 expr
= oberon_new_operator(OP_INTERSECTION
, result
, a
, b
);
2020 else if(result
-> class == OBERON_TYPE_INTEGER
2021 || result
-> class == OBERON_TYPE_REAL
)
2026 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
2029 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
2032 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
2035 expr
= oberon_new_operator(OP_MOD
, result
, a
, b
);
2050 oberon_error(ctx
, "invalid operation");
2056 #define ISMULOP(x) \
2057 ((x) >= STAR && (x) <= AND)
2059 static oberon_expr_t
*
2060 oberon_term_expr(oberon_context_t
* ctx
)
2062 oberon_expr_t
* expr
;
2064 expr
= oberon_factor(ctx
);
2065 while(ISMULOP(ctx
-> token
))
2067 int token
= ctx
-> token
;
2068 oberon_read_token(ctx
);
2070 oberon_expr_t
* inter
= oberon_factor(ctx
);
2071 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2077 #define ISADDOP(x) \
2078 ((x) >= PLUS && (x) <= OR)
2080 static oberon_expr_t
*
2081 oberon_simple_expr(oberon_context_t
* ctx
)
2083 oberon_expr_t
* expr
;
2086 if(ctx
-> token
== PLUS
)
2089 oberon_assert_token(ctx
, PLUS
);
2091 else if(ctx
-> token
== MINUS
)
2094 oberon_assert_token(ctx
, MINUS
);
2097 expr
= oberon_term_expr(ctx
);
2101 expr
= oberon_make_unary_op(ctx
, MINUS
, expr
);
2104 while(ISADDOP(ctx
-> token
))
2106 int token
= ctx
-> token
;
2107 oberon_read_token(ctx
);
2109 oberon_expr_t
* inter
= oberon_term_expr(ctx
);
2110 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2116 #define ISRELATION(x) \
2117 ((x) >= EQUAL && (x) <= IS)
2119 static oberon_expr_t
*
2120 oberon_expr(oberon_context_t
* ctx
)
2122 oberon_expr_t
* expr
;
2124 expr
= oberon_simple_expr(ctx
);
2125 while(ISRELATION(ctx
-> token
))
2127 int token
= ctx
-> token
;
2128 oberon_read_token(ctx
);
2130 oberon_expr_t
* inter
= oberon_simple_expr(ctx
);
2131 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2137 static oberon_item_t
*
2138 oberon_const_expr(oberon_context_t
* ctx
)
2140 oberon_expr_t
* expr
;
2141 expr
= oberon_expr(ctx
);
2143 if(expr
-> is_item
== 0)
2145 oberon_error(ctx
, "const expression are required");
2148 switch(expr
-> item
.mode
)
2160 oberon_error(ctx
, "const expression are required");
2164 return (oberon_item_t
*) expr
;
2167 // =======================================================================
2169 // =======================================================================
2171 static void oberon_decl_seq(oberon_context_t
* ctx
);
2172 static void oberon_statement_seq(oberon_context_t
* ctx
);
2173 static void oberon_initialize_decl(oberon_context_t
* ctx
);
2176 oberon_expect_token(oberon_context_t
* ctx
, int token
)
2178 if(ctx
-> token
!= token
)
2180 oberon_error(ctx
, "unexpected token %i (%i)", ctx
-> token
, token
);
2185 oberon_assert_token(oberon_context_t
* ctx
, int token
)
2187 oberon_expect_token(ctx
, token
);
2188 oberon_read_token(ctx
);
2192 oberon_assert_ident(oberon_context_t
* ctx
)
2194 oberon_expect_token(ctx
, IDENT
);
2195 char * ident
= ctx
-> string
;
2196 oberon_read_token(ctx
);
2201 oberon_def(oberon_context_t
* ctx
, int * export
, int * read_only
)
2203 switch(ctx
-> token
)
2206 oberon_assert_token(ctx
, STAR
);
2211 oberon_assert_token(ctx
, MINUS
);
2222 static oberon_object_t
*
2223 oberon_ident_def(oberon_context_t
* ctx
, int class, bool check_upscope
)
2228 oberon_object_t
* x
;
2230 name
= oberon_assert_ident(ctx
);
2231 oberon_def(ctx
, &export
, &read_only
);
2233 x
= oberon_define_object(ctx
-> decl
, name
, class, export
, read_only
, check_upscope
);
2238 oberon_ident_list(oberon_context_t
* ctx
, int class, bool check_upscope
, int * num
, oberon_object_t
** list
)
2241 *list
= oberon_ident_def(ctx
, class, check_upscope
);
2242 while(ctx
-> token
== COMMA
)
2244 oberon_assert_token(ctx
, COMMA
);
2245 oberon_ident_def(ctx
, class, check_upscope
);
2251 oberon_var_decl(oberon_context_t
* ctx
)
2254 oberon_object_t
* list
;
2255 oberon_type_t
* type
;
2256 type
= oberon_new_type_ptr(OBERON_TYPE_VOID
);
2258 oberon_ident_list(ctx
, OBERON_CLASS_VAR
, false, &num
, &list
);
2259 oberon_assert_token(ctx
, COLON
);
2260 oberon_type(ctx
, &type
);
2262 oberon_object_t
* var
= list
;
2263 for(int i
= 0; i
< num
; i
++)
2270 static oberon_object_t
*
2271 oberon_fp_section(oberon_context_t
* ctx
, int * num_decl
)
2273 int class = OBERON_CLASS_PARAM
;
2274 if(ctx
-> token
== VAR
)
2276 oberon_read_token(ctx
);
2277 class = OBERON_CLASS_VAR_PARAM
;
2281 oberon_object_t
* list
;
2282 oberon_ident_list(ctx
, class, false, &num
, &list
);
2284 oberon_assert_token(ctx
, COLON
);
2286 oberon_type_t
* type
;
2287 type
= oberon_new_type_ptr(OBERON_TYPE_VOID
);
2288 oberon_type(ctx
, &type
);
2290 oberon_object_t
* param
= list
;
2291 for(int i
= 0; i
< num
; i
++)
2293 param
-> type
= type
;
2294 param
= param
-> next
;
2301 #define ISFPSECTION \
2302 ((ctx -> token == VAR) || (ctx -> token == IDENT))
2305 oberon_formal_pars(oberon_context_t
* ctx
, oberon_type_t
* signature
)
2307 oberon_assert_token(ctx
, LPAREN
);
2311 signature
-> decl
= oberon_fp_section(ctx
, &signature
-> num_decl
);
2312 while(ctx
-> token
== SEMICOLON
)
2314 oberon_assert_token(ctx
, SEMICOLON
);
2315 oberon_fp_section(ctx
, &signature
-> num_decl
);
2319 oberon_assert_token(ctx
, RPAREN
);
2321 if(ctx
-> token
== COLON
)
2323 oberon_assert_token(ctx
, COLON
);
2325 oberon_object_t
* typeobj
;
2326 typeobj
= oberon_qualident(ctx
, NULL
, 1);
2327 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2329 oberon_error(ctx
, "function result is not type");
2331 signature
-> base
= typeobj
-> type
;
2336 oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
)
2338 oberon_type_t
* signature
;
2340 signature
-> class = OBERON_TYPE_PROCEDURE
;
2341 signature
-> num_decl
= 0;
2342 signature
-> base
= ctx
-> void_type
;
2343 signature
-> decl
= NULL
;
2345 if(ctx
-> token
== LPAREN
)
2347 oberon_formal_pars(ctx
, signature
);
2352 oberon_compare_signatures(oberon_context_t
* ctx
, oberon_type_t
* a
, oberon_type_t
* b
)
2354 if(a
-> num_decl
!= b
-> num_decl
)
2356 oberon_error(ctx
, "number parameters not matched");
2359 int num_param
= a
-> num_decl
;
2360 oberon_object_t
* param_a
= a
-> decl
;
2361 oberon_object_t
* param_b
= b
-> decl
;
2362 for(int i
= 0; i
< num_param
; i
++)
2364 if(strcmp(param_a
-> name
, param_b
-> name
) != 0)
2366 oberon_error(ctx
, "param %i name not matched", i
+ 1);
2369 if(param_a
-> type
!= param_b
-> type
)
2371 oberon_error(ctx
, "param %i type not matched", i
+ 1);
2374 param_a
= param_a
-> next
;
2375 param_b
= param_b
-> next
;
2380 oberon_make_return(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2382 oberon_object_t
* proc
= ctx
-> decl
-> parent
;
2383 oberon_type_t
* result_type
= proc
-> type
-> base
;
2385 if(result_type
-> class == OBERON_TYPE_VOID
)
2389 oberon_error(ctx
, "procedure has no result type");
2396 oberon_error(ctx
, "procedure requires expression on result");
2399 expr
= oberon_autocast_to(ctx
, expr
, result_type
);
2402 proc
-> has_return
= 1;
2404 oberon_generate_return(ctx
, expr
);
2408 oberon_proc_decl_body(oberon_context_t
* ctx
, oberon_object_t
* proc
)
2410 oberon_assert_token(ctx
, SEMICOLON
);
2412 ctx
-> decl
= proc
-> scope
;
2414 oberon_decl_seq(ctx
);
2416 oberon_generate_begin_proc(ctx
, proc
);
2418 if(ctx
-> token
== BEGIN
)
2420 oberon_assert_token(ctx
, BEGIN
);
2421 oberon_statement_seq(ctx
);
2424 oberon_assert_token(ctx
, END
);
2425 char * name
= oberon_assert_ident(ctx
);
2426 if(strcmp(name
, proc
-> name
) != 0)
2428 oberon_error(ctx
, "procedure name not matched");
2431 if(proc
-> type
-> base
-> class == OBERON_TYPE_VOID
2432 && proc
-> has_return
== 0)
2434 oberon_make_return(ctx
, NULL
);
2437 if(proc
-> has_return
== 0)
2439 oberon_error(ctx
, "procedure requires return");
2442 oberon_generate_end_proc(ctx
);
2443 oberon_close_scope(ctx
-> decl
);
2447 oberon_proc_decl(oberon_context_t
* ctx
)
2449 oberon_assert_token(ctx
, PROCEDURE
);
2452 if(ctx
-> token
== UPARROW
)
2454 oberon_assert_token(ctx
, UPARROW
);
2461 name
= oberon_assert_ident(ctx
);
2462 oberon_def(ctx
, &export
, &read_only
);
2464 oberon_scope_t
* proc_scope
;
2465 proc_scope
= oberon_open_scope(ctx
);
2466 ctx
-> decl
-> local
= 1;
2468 oberon_type_t
* signature
;
2469 signature
= oberon_new_type_ptr(OBERON_TYPE_VOID
);
2470 oberon_opt_formal_pars(ctx
, &signature
);
2472 //oberon_initialize_decl(ctx);
2473 oberon_generator_init_type(ctx
, signature
);
2474 oberon_close_scope(ctx
-> decl
);
2476 oberon_object_t
* proc
;
2477 proc
= oberon_find_object(ctx
-> decl
, name
, 0);
2480 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, export
, read_only
, false);
2481 proc
-> type
= signature
;
2482 proc
-> scope
= proc_scope
;
2483 oberon_generator_init_proc(ctx
, proc
);
2487 if(proc
-> class != OBERON_CLASS_PROC
)
2489 oberon_error(ctx
, "mult definition");
2496 oberon_error(ctx
, "mult procedure definition");
2500 if(proc
-> export
!= export
|| proc
-> read_only
!= read_only
)
2502 oberon_error(ctx
, "export type not matched");
2505 oberon_compare_signatures(ctx
, proc
-> type
, signature
);
2508 proc_scope
-> parent
= proc
;
2509 oberon_object_t
* param
= proc_scope
-> list
-> next
;
2512 param
-> parent
= proc
;
2513 param
= param
-> next
;
2519 oberon_proc_decl_body(ctx
, proc
);
2524 oberon_const_decl(oberon_context_t
* ctx
)
2526 oberon_item_t
* value
;
2527 oberon_object_t
* constant
;
2529 constant
= oberon_ident_def(ctx
, OBERON_CLASS_CONST
, false);
2530 oberon_assert_token(ctx
, EQUAL
);
2531 value
= oberon_const_expr(ctx
);
2532 constant
-> value
= value
;
2536 oberon_make_array_type(oberon_context_t
* ctx
, oberon_expr_t
* size
, oberon_type_t
* base
, oberon_type_t
** type
)
2538 if(size
-> is_item
== 0)
2540 oberon_error(ctx
, "requires constant");
2543 if(size
-> item
.mode
!= MODE_INTEGER
)
2545 oberon_error(ctx
, "requires integer constant");
2548 oberon_type_t
* arr
;
2550 arr
-> class = OBERON_TYPE_ARRAY
;
2551 arr
-> size
= size
-> item
.integer
;
2556 oberon_qualident_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2559 oberon_object_t
* to
;
2561 to
= oberon_qualident(ctx
, &name
, 0);
2563 //name = oberon_assert_ident(ctx);
2564 //to = oberon_find_object(ctx -> decl, name, 0);
2568 if(to
-> class != OBERON_CLASS_TYPE
)
2570 oberon_error(ctx
, "not a type");
2575 to
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, false, false, false);
2576 to
-> type
= oberon_new_type_ptr(OBERON_TYPE_VOID
);
2582 static void oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
);
2585 * Правило граматики "type". Указатель type должен указывать на существующий объект!
2589 oberon_make_multiarray(oberon_context_t
* ctx
, oberon_expr_t
* sizes
, oberon_type_t
* base
, oberon_type_t
** type
)
2597 oberon_type_t
* dim
;
2598 dim
= oberon_new_type_ptr(OBERON_TYPE_VOID
);
2600 oberon_make_multiarray(ctx
, sizes
-> next
, base
, &dim
);
2602 oberon_make_array_type(ctx
, sizes
, dim
, type
);
2606 oberon_make_open_array(oberon_context_t
* ctx
, oberon_type_t
* base
, oberon_type_t
* type
)
2608 type
-> class = OBERON_TYPE_ARRAY
;
2610 type
-> base
= base
;
2614 oberon_field_list(oberon_context_t
* ctx
, oberon_type_t
* rec
, oberon_scope_t
* modscope
)
2616 if(ctx
-> token
== IDENT
)
2619 oberon_object_t
* list
;
2620 oberon_type_t
* type
;
2621 type
= oberon_new_type_ptr(OBERON_TYPE_VOID
);
2623 oberon_ident_list(ctx
, OBERON_CLASS_FIELD
, true, &num
, &list
);
2624 oberon_assert_token(ctx
, COLON
);
2626 oberon_scope_t
* current
= ctx
-> decl
;
2627 ctx
-> decl
= modscope
;
2628 oberon_type(ctx
, &type
);
2629 ctx
-> decl
= current
;
2631 oberon_object_t
* field
= list
;
2632 for(int i
= 0; i
< num
; i
++)
2634 field
-> type
= type
;
2635 field
= field
-> next
;
2638 rec
-> num_decl
+= num
;
2643 oberon_type_record_body(oberon_context_t
* ctx
, oberon_type_t
* rec
)
2645 oberon_scope_t
* modscope
= ctx
-> mod
-> decl
;
2646 oberon_scope_t
* oldscope
= ctx
-> decl
;
2647 ctx
-> decl
= modscope
;
2649 if(ctx
-> token
== LPAREN
)
2651 oberon_assert_token(ctx
, LPAREN
);
2653 oberon_object_t
* typeobj
;
2654 typeobj
= oberon_qualident(ctx
, NULL
, true);
2656 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2658 oberon_error(ctx
, "base must be type");
2661 oberon_type_t
* base
= typeobj
-> type
;
2662 if(base
-> class == OBERON_TYPE_POINTER
)
2664 base
= base
-> base
;
2667 if(base
-> class != OBERON_TYPE_RECORD
)
2669 oberon_error(ctx
, "base must be record type");
2673 ctx
-> decl
= base
-> scope
;
2675 oberon_assert_token(ctx
, RPAREN
);
2682 oberon_scope_t
* this_scope
;
2683 this_scope
= oberon_open_scope(ctx
);
2684 this_scope
-> local
= true;
2685 this_scope
-> parent
= NULL
;
2686 this_scope
-> parent_type
= rec
;
2688 oberon_field_list(ctx
, rec
, modscope
);
2689 while(ctx
-> token
== SEMICOLON
)
2691 oberon_assert_token(ctx
, SEMICOLON
);
2692 oberon_field_list(ctx
, rec
, modscope
);
2695 rec
-> scope
= this_scope
;
2696 rec
-> decl
= this_scope
-> list
-> next
;
2697 ctx
-> decl
= oldscope
;
2701 oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2703 if(ctx
-> token
== IDENT
)
2705 oberon_qualident_type(ctx
, type
);
2707 else if(ctx
-> token
== ARRAY
)
2709 oberon_assert_token(ctx
, ARRAY
);
2712 oberon_expr_t
* sizes
;
2714 if(ISEXPR(ctx
-> token
))
2716 oberon_expr_list(ctx
, &num_sizes
, &sizes
, 1);
2719 oberon_assert_token(ctx
, OF
);
2721 oberon_type_t
* base
;
2722 base
= oberon_new_type_ptr(OBERON_TYPE_VOID
);
2723 oberon_type(ctx
, &base
);
2727 oberon_make_open_array(ctx
, base
, *type
);
2731 oberon_make_multiarray(ctx
, sizes
, base
, type
);
2734 else if(ctx
-> token
== RECORD
)
2736 oberon_type_t
* rec
;
2738 rec
-> class = OBERON_TYPE_RECORD
;
2739 rec
-> module
= ctx
-> mod
;
2741 oberon_assert_token(ctx
, RECORD
);
2742 oberon_type_record_body(ctx
, rec
);
2743 oberon_assert_token(ctx
, END
);
2747 else if(ctx
-> token
== POINTER
)
2749 oberon_assert_token(ctx
, POINTER
);
2750 oberon_assert_token(ctx
, TO
);
2752 oberon_type_t
* base
;
2753 base
= oberon_new_type_ptr(OBERON_TYPE_VOID
);
2754 oberon_type(ctx
, &base
);
2756 oberon_type_t
* ptr
;
2758 ptr
-> class = OBERON_TYPE_POINTER
;
2761 else if(ctx
-> token
== PROCEDURE
)
2763 oberon_open_scope(ctx
);
2764 oberon_assert_token(ctx
, PROCEDURE
);
2765 oberon_opt_formal_pars(ctx
, type
);
2766 oberon_close_scope(ctx
-> decl
);
2770 oberon_error(ctx
, "invalid type declaration");
2775 oberon_type_decl(oberon_context_t
* ctx
)
2778 oberon_object_t
* newtype
;
2779 oberon_type_t
* type
;
2783 name
= oberon_assert_ident(ctx
);
2784 oberon_def(ctx
, &export
, &read_only
);
2786 newtype
= oberon_find_object(ctx
-> decl
, name
, 0);
2789 newtype
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, export
, read_only
, false);
2790 newtype
-> type
= oberon_new_type_ptr(OBERON_TYPE_VOID
);
2791 assert(newtype
-> type
);
2795 if(newtype
-> class != OBERON_CLASS_TYPE
)
2797 oberon_error(ctx
, "mult definition");
2800 if(newtype
-> linked
)
2802 oberon_error(ctx
, "mult definition - already linked");
2805 newtype
-> export
= export
;
2806 newtype
-> read_only
= read_only
;
2809 oberon_assert_token(ctx
, EQUAL
);
2811 type
= newtype
-> type
;
2812 oberon_type(ctx
, &type
);
2814 if(type
-> class == OBERON_TYPE_VOID
)
2816 oberon_error(ctx
, "recursive alias declaration");
2819 newtype
-> type
= type
;
2820 newtype
-> linked
= 1;
2823 static void oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2824 static void oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2827 oberon_prevent_recursive_pointer(oberon_context_t
* ctx
, oberon_type_t
* type
)
2829 if(type
-> class != OBERON_TYPE_POINTER
2830 && type
-> class != OBERON_TYPE_ARRAY
)
2835 if(type
-> recursive
)
2837 oberon_error(ctx
, "recursive pointer declaration");
2840 if(type
-> class == OBERON_TYPE_POINTER
2841 && type
-> base
-> class == OBERON_TYPE_POINTER
)
2843 oberon_error(ctx
, "attempt to make pointer to pointer");
2846 type
-> recursive
= 1;
2848 oberon_prevent_recursive_pointer(ctx
, type
-> base
);
2850 type
-> recursive
= 0;
2854 oberon_prevent_recursive_record(oberon_context_t
* ctx
, oberon_type_t
* type
)
2856 if(type
-> class != OBERON_TYPE_RECORD
)
2861 if(type
-> recursive
)
2863 oberon_error(ctx
, "recursive record declaration");
2866 type
-> recursive
= 1;
2868 int num_fields
= type
-> num_decl
;
2869 oberon_object_t
* field
= type
-> decl
;
2870 for(int i
= 0; i
< num_fields
; i
++)
2872 oberon_prevent_recursive_object(ctx
, field
);
2873 field
= field
-> next
;
2876 type
-> recursive
= 0;
2879 oberon_prevent_recursive_procedure(oberon_context_t
* ctx
, oberon_type_t
* type
)
2881 if(type
-> class != OBERON_TYPE_PROCEDURE
)
2886 if(type
-> recursive
)
2888 oberon_error(ctx
, "recursive procedure declaration");
2891 type
-> recursive
= 1;
2893 int num_fields
= type
-> num_decl
;
2894 oberon_object_t
* field
= type
-> decl
;
2895 for(int i
= 0; i
< num_fields
; i
++)
2897 oberon_prevent_recursive_object(ctx
, field
);
2898 field
= field
-> next
;
2901 type
-> recursive
= 0;
2905 oberon_prevent_recursive_array(oberon_context_t
* ctx
, oberon_type_t
* type
)
2907 if(type
-> class != OBERON_TYPE_ARRAY
)
2912 if(type
-> recursive
)
2914 oberon_error(ctx
, "recursive array declaration");
2917 type
-> recursive
= 1;
2919 oberon_prevent_recursive_type(ctx
, type
-> base
);
2921 type
-> recursive
= 0;
2925 oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2927 if(type
-> class == OBERON_TYPE_POINTER
)
2929 oberon_prevent_recursive_pointer(ctx
, type
);
2931 else if(type
-> class == OBERON_TYPE_RECORD
)
2933 oberon_prevent_recursive_record(ctx
, type
);
2935 else if(type
-> class == OBERON_TYPE_ARRAY
)
2937 oberon_prevent_recursive_array(ctx
, type
);
2939 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2941 oberon_prevent_recursive_procedure(ctx
, type
);
2946 oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2950 case OBERON_CLASS_VAR
:
2951 case OBERON_CLASS_TYPE
:
2952 case OBERON_CLASS_PARAM
:
2953 case OBERON_CLASS_VAR_PARAM
:
2954 case OBERON_CLASS_FIELD
:
2955 oberon_prevent_recursive_type(ctx
, x
-> type
);
2957 case OBERON_CLASS_CONST
:
2958 case OBERON_CLASS_PROC
:
2959 case OBERON_CLASS_MODULE
:
2962 oberon_error(ctx
, "oberon_prevent_recursive_object: wat");
2968 oberon_prevent_recursive_decl(oberon_context_t
* ctx
)
2970 oberon_object_t
* x
= ctx
-> decl
-> list
-> next
;
2974 oberon_prevent_recursive_object(ctx
, x
);
2979 static void oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2980 static void oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2983 oberon_initialize_record_fields(oberon_context_t
* ctx
, oberon_type_t
* type
)
2985 if(type
-> class != OBERON_TYPE_RECORD
)
2990 int num_fields
= type
-> num_decl
;
2991 oberon_object_t
* field
= type
-> decl
;
2992 for(int i
= 0; i
< num_fields
; i
++)
2994 if(field
-> type
-> class == OBERON_TYPE_POINTER
)
2996 oberon_initialize_type(ctx
, field
-> type
);
2999 oberon_initialize_object(ctx
, field
);
3000 field
= field
-> next
;
3003 oberon_generator_init_record(ctx
, type
);
3007 oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
3009 if(type
-> class == OBERON_TYPE_VOID
)
3011 oberon_error(ctx
, "undeclarated type");
3014 if(type
-> initialized
)
3019 type
-> initialized
= 1;
3021 if(type
-> class == OBERON_TYPE_POINTER
)
3023 oberon_initialize_type(ctx
, type
-> base
);
3024 oberon_generator_init_type(ctx
, type
);
3026 else if(type
-> class == OBERON_TYPE_ARRAY
)
3028 if(type
-> size
!= 0)
3030 if(type
-> base
-> class == OBERON_TYPE_ARRAY
)
3032 if(type
-> base
-> size
== 0)
3034 oberon_error(ctx
, "open array not allowed as array element");
3039 oberon_initialize_type(ctx
, type
-> base
);
3040 oberon_generator_init_type(ctx
, type
);
3042 else if(type
-> class == OBERON_TYPE_RECORD
)
3044 oberon_generator_init_type(ctx
, type
);
3045 oberon_initialize_record_fields(ctx
, type
);
3047 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
3049 int num_fields
= type
-> num_decl
;
3050 oberon_object_t
* field
= type
-> decl
;
3051 for(int i
= 0; i
< num_fields
; i
++)
3053 oberon_initialize_object(ctx
, field
);
3054 field
= field
-> next
;
3057 oberon_generator_init_type(ctx
, type
);
3061 oberon_generator_init_type(ctx
, type
);
3066 oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
3068 if(x
-> initialized
)
3073 x
-> initialized
= 1;
3077 case OBERON_CLASS_TYPE
:
3078 oberon_initialize_type(ctx
, x
-> type
);
3080 case OBERON_CLASS_VAR
:
3081 case OBERON_CLASS_FIELD
:
3082 if(x
-> type
-> class == OBERON_TYPE_ARRAY
)
3084 if(x
-> type
-> size
== 0)
3086 oberon_error(ctx
, "open array not allowed as variable or field");
3089 oberon_initialize_type(ctx
, x
-> type
);
3090 oberon_generator_init_var(ctx
, x
);
3092 case OBERON_CLASS_PARAM
:
3093 case OBERON_CLASS_VAR_PARAM
:
3094 oberon_initialize_type(ctx
, x
-> type
);
3095 oberon_generator_init_var(ctx
, x
);
3097 case OBERON_CLASS_CONST
:
3098 case OBERON_CLASS_PROC
:
3099 case OBERON_CLASS_MODULE
:
3102 oberon_error(ctx
, "oberon_initialize_object: wat");
3108 oberon_initialize_decl(oberon_context_t
* ctx
)
3110 oberon_object_t
* x
= ctx
-> decl
-> list
;
3114 oberon_initialize_object(ctx
, x
-> next
);
3120 oberon_prevent_undeclarated_procedures(oberon_context_t
* ctx
)
3122 oberon_object_t
* x
= ctx
-> decl
-> list
;
3126 if(x
-> next
-> class == OBERON_CLASS_PROC
)
3128 if(x
-> next
-> linked
== 0)
3130 oberon_error(ctx
, "unresolved forward declaration");
3138 oberon_decl_seq(oberon_context_t
* ctx
)
3140 if(ctx
-> token
== CONST
)
3142 oberon_assert_token(ctx
, CONST
);
3143 while(ctx
-> token
== IDENT
)
3145 oberon_const_decl(ctx
);
3146 oberon_assert_token(ctx
, SEMICOLON
);
3150 if(ctx
-> token
== TYPE
)
3152 oberon_assert_token(ctx
, TYPE
);
3153 while(ctx
-> token
== IDENT
)
3155 oberon_type_decl(ctx
);
3156 oberon_assert_token(ctx
, SEMICOLON
);
3160 if(ctx
-> token
== VAR
)
3162 oberon_assert_token(ctx
, VAR
);
3163 while(ctx
-> token
== IDENT
)
3165 oberon_var_decl(ctx
);
3166 oberon_assert_token(ctx
, SEMICOLON
);
3170 oberon_prevent_recursive_decl(ctx
);
3171 oberon_initialize_decl(ctx
);
3173 while(ctx
-> token
== PROCEDURE
)
3175 oberon_proc_decl(ctx
);
3176 oberon_assert_token(ctx
, SEMICOLON
);
3179 oberon_prevent_undeclarated_procedures(ctx
);
3182 static oberon_expr_t
*
3183 oberon_make_temp_var_item(oberon_context_t
* ctx
, oberon_type_t
* type
)
3185 oberon_object_t
* x
;
3186 oberon_expr_t
* expr
;
3188 x
= oberon_create_object(ctx
-> decl
, "TEMP", OBERON_CLASS_VAR
, false, false);
3191 oberon_generator_init_temp_var(ctx
, x
);
3193 expr
= oberon_new_item(MODE_VAR
, type
, false);
3194 expr
-> item
.var
= x
;
3199 oberon_statement_seq(oberon_context_t
* ctx
);
3202 oberon_assign(oberon_context_t
* ctx
, oberon_expr_t
* src
, oberon_expr_t
* dst
)
3204 if(dst
-> read_only
)
3206 oberon_error(ctx
, "read-only destination");
3209 oberon_check_dst(ctx
, dst
);
3210 src
= oberon_autocast_to(ctx
, src
, dst
-> result
);
3211 oberon_generate_assign(ctx
, src
, dst
);
3214 static oberon_expr_t
*
3215 oberon_case_labels(oberon_context_t
* ctx
, oberon_expr_t
* val
)
3219 oberon_expr_t
* cond
;
3220 oberon_expr_t
* cond2
;
3222 e1
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3223 oberon_autocast_to(ctx
, e1
, val
-> result
);
3226 if(ctx
-> token
== DOTDOT
)
3228 oberon_assert_token(ctx
, DOTDOT
);
3229 e2
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3230 oberon_autocast_to(ctx
, e2
, val
-> result
);
3236 cond
= oberon_make_bin_op(ctx
, EQUAL
, val
, e1
);
3240 /* val >= e1 && val <= e2 */
3241 cond
= oberon_make_bin_op(ctx
, GEQ
, val
, e1
);
3242 cond2
= oberon_make_bin_op(ctx
, LEQ
, val
, e2
);
3243 cond
= oberon_make_bin_op(ctx
, AND
, cond
, cond2
);
3250 oberon_case(oberon_context_t
* ctx
, oberon_expr_t
* val
, gen_label_t
* end
)
3252 oberon_expr_t
* cond
;
3253 oberon_expr_t
* cond2
;
3254 gen_label_t
* this_end
;
3256 if(ISEXPR(ctx
-> token
))
3258 this_end
= oberon_generator_reserve_label(ctx
);
3260 cond
= oberon_case_labels(ctx
, val
);
3261 while(ctx
-> token
== COMMA
)
3263 oberon_assert_token(ctx
, COMMA
);
3265 cond2
= oberon_case_labels(ctx
, val
);
3266 cond
= oberon_make_bin_op(ctx
, OR
, cond
, cond2
);
3268 oberon_assert_token(ctx
, COLON
);
3270 oberon_generate_branch(ctx
, cond
, false, this_end
);
3271 oberon_statement_seq(ctx
);
3272 oberon_generate_goto(ctx
, end
);
3274 oberon_generate_label(ctx
, this_end
);
3279 oberon_case_statement(oberon_context_t
* ctx
)
3281 oberon_expr_t
* val
;
3282 oberon_expr_t
* expr
;
3285 end
= oberon_generator_reserve_label(ctx
);
3287 oberon_assert_token(ctx
, CASE
);
3288 expr
= oberon_expr(ctx
);
3289 val
= oberon_make_temp_var_item(ctx
, expr
-> result
);
3290 oberon_assign(ctx
, expr
, val
);
3291 oberon_assert_token(ctx
, OF
);
3292 oberon_case(ctx
, val
, end
);
3293 while(ctx
-> token
== BAR
)
3295 oberon_assert_token(ctx
, BAR
);
3296 oberon_case(ctx
, val
, end
);
3299 if(ctx
-> token
== ELSE
)
3301 oberon_assert_token(ctx
, ELSE
);
3302 oberon_statement_seq(ctx
);
3305 oberon_generate_label(ctx
, end
);
3306 oberon_assert_token(ctx
, END
);
3310 oberon_with_guard_do(oberon_context_t
* ctx
, gen_label_t
* end
)
3312 oberon_expr_t
* val
;
3313 oberon_expr_t
* var
;
3314 oberon_expr_t
* type
;
3315 oberon_expr_t
* cond
;
3316 oberon_expr_t
* cast
;
3317 oberon_type_t
* old_type
;
3318 gen_var_t
* old_var
;
3319 gen_label_t
* this_end
;
3321 this_end
= oberon_generator_reserve_label(ctx
);
3323 var
= oberon_qualident_expr(ctx
);
3324 oberon_assert_token(ctx
, COLON
);
3325 type
= oberon_qualident_expr(ctx
);
3326 cond
= oberon_make_bin_op(ctx
, IS
, var
, type
);
3328 oberon_assert_token(ctx
, DO
);
3329 oberon_generate_branch(ctx
, cond
, false, this_end
);
3331 /* Сохраняем ссылку во временной переменной */
3332 val
= oberon_make_temp_var_item(ctx
, type
-> result
);
3333 cast
= oberno_make_record_cast(ctx
, var
, type
-> result
);
3334 oberon_assign(ctx
, cast
, val
);
3335 /* Подменяем тип у оригинальной переменной */
3336 old_type
= var
-> item
.var
-> type
;
3337 var
-> item
.var
-> type
= type
-> result
;
3338 /* Подменяем ссылку на переменную */
3339 old_var
= var
-> item
.var
-> gen_var
;
3340 var
-> item
.var
-> gen_var
= val
-> item
.var
-> gen_var
;
3342 oberon_statement_seq(ctx
);
3343 oberon_generate_goto(ctx
, end
);
3344 oberon_generate_label(ctx
, this_end
);
3346 /* Возвращаем исходное состояние */
3347 var
-> item
.var
-> gen_var
= old_var
;
3348 var
-> item
.var
-> type
= old_type
;
3352 oberon_with_statement(oberon_context_t
* ctx
)
3355 end
= oberon_generator_reserve_label(ctx
);
3357 oberon_assert_token(ctx
, WITH
);
3358 oberon_with_guard_do(ctx
, end
);
3359 while(ctx
-> token
== BAR
)
3361 oberon_assert_token(ctx
, BAR
);
3362 oberon_with_guard_do(ctx
, end
);
3365 if(ctx
-> token
== ELSE
)
3367 oberon_assert_token(ctx
, ELSE
);
3368 oberon_statement_seq(ctx
);
3371 oberon_generate_label(ctx
, end
);
3372 oberon_assert_token(ctx
, END
);
3376 oberon_statement(oberon_context_t
* ctx
)
3378 oberon_expr_t
* item1
;
3379 oberon_expr_t
* item2
;
3381 if(ctx
-> token
== IDENT
)
3383 item1
= oberon_designator(ctx
);
3384 if(ctx
-> token
== ASSIGN
)
3386 oberon_assert_token(ctx
, ASSIGN
);
3387 item2
= oberon_expr(ctx
);
3388 oberon_assign(ctx
, item2
, item1
);
3392 oberon_opt_proc_parens(ctx
, item1
);
3395 else if(ctx
-> token
== IF
)
3399 oberon_expr_t
* cond
;
3401 els
= oberon_generator_reserve_label(ctx
);
3402 end
= oberon_generator_reserve_label(ctx
);
3404 oberon_assert_token(ctx
, IF
);
3405 cond
= oberon_expr(ctx
);
3406 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3408 oberon_error(ctx
, "condition must be boolean");
3410 oberon_assert_token(ctx
, THEN
);
3411 oberon_generate_branch(ctx
, cond
, false, els
);
3412 oberon_statement_seq(ctx
);
3413 oberon_generate_goto(ctx
, end
);
3414 oberon_generate_label(ctx
, els
);
3416 while(ctx
-> token
== ELSIF
)
3418 els
= oberon_generator_reserve_label(ctx
);
3420 oberon_assert_token(ctx
, ELSIF
);
3421 cond
= oberon_expr(ctx
);
3422 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3424 oberon_error(ctx
, "condition must be boolean");
3426 oberon_assert_token(ctx
, THEN
);
3427 oberon_generate_branch(ctx
, cond
, false, els
);
3428 oberon_statement_seq(ctx
);
3429 oberon_generate_goto(ctx
, end
);
3430 oberon_generate_label(ctx
, els
);
3433 if(ctx
-> token
== ELSE
)
3435 oberon_assert_token(ctx
, ELSE
);
3436 oberon_statement_seq(ctx
);
3439 oberon_generate_label(ctx
, end
);
3440 oberon_assert_token(ctx
, END
);
3442 else if(ctx
-> token
== WHILE
)
3444 gen_label_t
* begin
;
3446 oberon_expr_t
* cond
;
3448 begin
= oberon_generator_reserve_label(ctx
);
3449 end
= oberon_generator_reserve_label(ctx
);
3451 oberon_assert_token(ctx
, WHILE
);
3452 oberon_generate_label(ctx
, begin
);
3453 cond
= oberon_expr(ctx
);
3454 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3456 oberon_error(ctx
, "condition must be boolean");
3458 oberon_generate_branch(ctx
, cond
, false, end
);
3460 oberon_assert_token(ctx
, DO
);
3461 oberon_statement_seq(ctx
);
3462 oberon_generate_goto(ctx
, begin
);
3464 oberon_assert_token(ctx
, END
);
3465 oberon_generate_label(ctx
, end
);
3467 else if(ctx
-> token
== REPEAT
)
3469 gen_label_t
* begin
;
3470 oberon_expr_t
* cond
;
3472 begin
= oberon_generator_reserve_label(ctx
);
3473 oberon_generate_label(ctx
, begin
);
3474 oberon_assert_token(ctx
, REPEAT
);
3476 oberon_statement_seq(ctx
);
3478 oberon_assert_token(ctx
, UNTIL
);
3480 cond
= oberon_expr(ctx
);
3481 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3483 oberon_error(ctx
, "condition must be boolean");
3486 oberon_generate_branch(ctx
, cond
, true, begin
);
3488 else if(ctx
-> token
== FOR
)
3490 oberon_expr_t
* from
;
3491 oberon_expr_t
* index
;
3493 oberon_expr_t
* bound
;
3495 oberon_expr_t
* cond
;
3496 oberon_expr_t
* count
;
3497 gen_label_t
* begin
;
3502 begin
= oberon_generator_reserve_label(ctx
);
3503 end
= oberon_generator_reserve_label(ctx
);
3505 oberon_assert_token(ctx
, FOR
);
3506 iname
= oberon_assert_ident(ctx
);
3507 index
= oberon_ident_item(ctx
, iname
);
3508 oberon_assert_token(ctx
, ASSIGN
);
3509 from
= oberon_expr(ctx
);
3510 oberon_assign(ctx
, from
, index
);
3511 oberon_assert_token(ctx
, TO
);
3512 bound
= oberon_make_temp_var_item(ctx
, index
-> result
);
3513 to
= oberon_expr(ctx
);
3514 oberon_assign(ctx
, to
, bound
);
3515 if(ctx
-> token
== BY
)
3517 oberon_assert_token(ctx
, BY
);
3518 by
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3522 by
= oberon_integer_item(ctx
, 1);
3525 if(by
-> result
-> class != OBERON_TYPE_INTEGER
)
3527 oberon_error(ctx
, "must be integer");
3530 if(by
-> item
.integer
> 0)
3534 else if(by
-> item
.integer
< 0)
3540 oberon_error(ctx
, "zero step not allowed");
3543 oberon_assert_token(ctx
, DO
);
3544 oberon_generate_label(ctx
, begin
);
3545 cond
= oberon_make_bin_op(ctx
, op
, index
, bound
);
3546 oberon_generate_branch(ctx
, cond
, false, end
);
3547 oberon_statement_seq(ctx
);
3548 count
= oberon_make_bin_op(ctx
, PLUS
, index
, by
);
3549 oberon_assign(ctx
, count
, index
);
3550 oberon_generate_goto(ctx
, begin
);
3551 oberon_generate_label(ctx
, end
);
3552 oberon_assert_token(ctx
, END
);
3554 else if(ctx
-> token
== LOOP
)
3556 gen_label_t
* begin
;
3559 begin
= oberon_generator_reserve_label(ctx
);
3560 end
= oberon_generator_reserve_label(ctx
);
3562 oberon_open_scope(ctx
);
3563 oberon_assert_token(ctx
, LOOP
);
3564 oberon_generate_label(ctx
, begin
);
3565 ctx
-> decl
-> exit_label
= end
;
3566 oberon_statement_seq(ctx
);
3567 oberon_generate_goto(ctx
, begin
);
3568 oberon_generate_label(ctx
, end
);
3569 oberon_assert_token(ctx
, END
);
3570 oberon_close_scope(ctx
-> decl
);
3572 else if(ctx
-> token
== EXIT
)
3574 oberon_assert_token(ctx
, EXIT
);
3575 if(ctx
-> decl
-> exit_label
== NULL
)
3577 oberon_error(ctx
, "not in LOOP-END");
3579 oberon_generate_goto(ctx
, ctx
-> decl
-> exit_label
);
3581 else if(ctx
-> token
== CASE
)
3583 oberon_case_statement(ctx
);
3585 else if(ctx
-> token
== WITH
)
3587 oberon_with_statement(ctx
);
3589 else if(ctx
-> token
== RETURN
)
3591 oberon_assert_token(ctx
, RETURN
);
3592 if(ISEXPR(ctx
-> token
))
3594 oberon_expr_t
* expr
;
3595 expr
= oberon_expr(ctx
);
3596 oberon_make_return(ctx
, expr
);
3600 oberon_make_return(ctx
, NULL
);
3606 oberon_statement_seq(oberon_context_t
* ctx
)
3608 oberon_statement(ctx
);
3609 while(ctx
-> token
== SEMICOLON
)
3611 oberon_assert_token(ctx
, SEMICOLON
);
3612 oberon_statement(ctx
);
3617 oberon_import_module(oberon_context_t
* ctx
, char * alias
, char * name
)
3619 oberon_module_t
* m
= ctx
-> module_list
;
3620 while(m
&& strcmp(m
-> name
, name
) != 0)
3628 code
= ctx
-> import_module(name
);
3631 oberon_error(ctx
, "no such module");
3634 m
= oberon_compile_module(ctx
, code
);
3640 oberon_error(ctx
, "cyclic module import");
3643 oberon_object_t
* ident
;
3644 ident
= oberon_define_object(ctx
-> decl
, alias
, OBERON_CLASS_MODULE
, false, false, false);
3645 ident
-> module
= m
;
3649 oberon_import_decl(oberon_context_t
* ctx
)
3654 alias
= name
= oberon_assert_ident(ctx
);
3655 if(ctx
-> token
== ASSIGN
)
3657 oberon_assert_token(ctx
, ASSIGN
);
3658 name
= oberon_assert_ident(ctx
);
3661 oberon_import_module(ctx
, alias
, name
);
3665 oberon_import_list(oberon_context_t
* ctx
)
3667 oberon_assert_token(ctx
, IMPORT
);
3669 oberon_import_decl(ctx
);
3670 while(ctx
-> token
== COMMA
)
3672 oberon_assert_token(ctx
, COMMA
);
3673 oberon_import_decl(ctx
);
3676 oberon_assert_token(ctx
, SEMICOLON
);
3680 oberon_parse_module(oberon_context_t
* ctx
)
3684 oberon_read_token(ctx
);
3686 oberon_assert_token(ctx
, MODULE
);
3687 name1
= oberon_assert_ident(ctx
);
3688 oberon_assert_token(ctx
, SEMICOLON
);
3689 ctx
-> mod
-> name
= name1
;
3691 oberon_generator_init_module(ctx
, ctx
-> mod
);
3693 if(ctx
-> token
== IMPORT
)
3695 oberon_import_list(ctx
);
3698 oberon_decl_seq(ctx
);
3700 oberon_generate_begin_module(ctx
);
3701 if(ctx
-> token
== BEGIN
)
3703 oberon_assert_token(ctx
, BEGIN
);
3704 oberon_statement_seq(ctx
);
3706 oberon_generate_end_module(ctx
);
3708 oberon_assert_token(ctx
, END
);
3709 name2
= oberon_assert_ident(ctx
);
3710 oberon_assert_token(ctx
, DOT
);
3712 if(strcmp(name1
, name2
) != 0)
3714 oberon_error(ctx
, "module name not matched");
3717 oberon_generator_fini_module(ctx
-> mod
);
3720 // =======================================================================
3722 // =======================================================================
3725 register_default_types(oberon_context_t
* ctx
)
3727 ctx
-> void_type
= oberon_new_type_ptr(OBERON_TYPE_VOID
);
3728 oberon_generator_init_type(ctx
, ctx
-> void_type
);
3730 ctx
-> void_ptr_type
= oberon_new_type_ptr(OBERON_TYPE_POINTER
);
3731 ctx
-> void_ptr_type
-> base
= ctx
-> void_type
;
3732 oberon_generator_init_type(ctx
, ctx
-> void_ptr_type
);
3734 ctx
-> string_type
= oberon_new_type_string(1);
3735 oberon_generator_init_type(ctx
, ctx
-> string_type
);
3737 ctx
-> bool_type
= oberon_new_type_boolean();
3738 oberon_define_type(ctx
-> world_scope
, "BOOLEAN", ctx
-> bool_type
, 1);
3740 ctx
-> byte_type
= oberon_new_type_integer(1);
3741 oberon_define_type(ctx
-> world_scope
, "BYTE", ctx
-> byte_type
, 1);
3743 ctx
-> shortint_type
= oberon_new_type_integer(2);
3744 oberon_define_type(ctx
-> world_scope
, "SHORTINT", ctx
-> shortint_type
, 1);
3746 ctx
-> int_type
= oberon_new_type_integer(4);
3747 oberon_define_type(ctx
-> world_scope
, "INTEGER", ctx
-> int_type
, 1);
3749 ctx
-> longint_type
= oberon_new_type_integer(8);
3750 oberon_define_type(ctx
-> world_scope
, "LONGINT", ctx
-> longint_type
, 1);
3752 ctx
-> real_type
= oberon_new_type_real(4);
3753 oberon_define_type(ctx
-> world_scope
, "REAL", ctx
-> real_type
, 1);
3755 ctx
-> longreal_type
= oberon_new_type_real(8);
3756 oberon_define_type(ctx
-> world_scope
, "LONGREAL", ctx
-> longreal_type
, 1);
3758 ctx
-> char_type
= oberon_new_type_char(1);
3759 oberon_define_type(ctx
-> world_scope
, "CHAR", ctx
-> char_type
, 1);
3761 ctx
-> set_type
= oberon_new_type_set(4);
3762 oberon_define_type(ctx
-> world_scope
, "SET", ctx
-> set_type
, 1);
3766 oberon_new_intrinsic(oberon_context_t
* ctx
, char * name
, GenerateFuncCallback f
, GenerateProcCallback p
)
3768 oberon_object_t
* proc
;
3769 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, true, false, false);
3770 proc
-> type
= oberon_new_type_ptr(OBERON_TYPE_PROCEDURE
);
3771 proc
-> type
-> sysproc
= true;
3772 proc
-> type
-> genfunc
= f
;
3773 proc
-> type
-> genproc
= p
;
3776 static oberon_expr_t
*
3777 oberon_make_min_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
;
3792 if(!arg
-> is_item
|| arg
-> item
.mode
!= MODE_TYPE
)
3794 oberon_error(ctx
, "MIN accept only type");
3797 oberon_expr_t
* expr
;
3798 int bits
= arg
-> result
-> size
* 8;
3799 switch(arg
-> result
-> class)
3801 case OBERON_TYPE_INTEGER
:
3802 expr
= oberon_integer_item(ctx
, -powl(2, bits
- 1));
3804 case OBERON_TYPE_SET
:
3805 expr
= oberon_integer_item(ctx
, 0);
3808 oberon_error(ctx
, "allowed only basic types");
3815 static oberon_expr_t
*
3816 oberon_make_max_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3820 oberon_error(ctx
, "too few arguments");
3825 oberon_error(ctx
, "too mach arguments");
3828 oberon_expr_t
* arg
;
3831 if(!arg
-> is_item
|| arg
-> item
.mode
!= MODE_TYPE
)
3833 oberon_error(ctx
, "MAX accept only type");
3836 oberon_expr_t
* expr
;
3837 int bits
= arg
-> result
-> size
* 8;
3838 switch(arg
-> result
-> class)
3840 case OBERON_TYPE_INTEGER
:
3841 expr
= oberon_integer_item(ctx
, powl(2, bits
- 1) - 1);
3843 case OBERON_TYPE_SET
:
3844 expr
= oberon_integer_item(ctx
, bits
);
3847 oberon_error(ctx
, "allowed only basic types");
3854 static oberon_expr_t
*
3855 oberon_make_size_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3859 oberon_error(ctx
, "too few arguments");
3864 oberon_error(ctx
, "too mach arguments");
3867 oberon_expr_t
* arg
;
3870 if(!arg
-> is_item
|| arg
-> item
.mode
!= MODE_TYPE
)
3872 oberon_error(ctx
, "SIZE accept only type");
3876 oberon_expr_t
* expr
;
3877 oberon_type_t
* type
= arg
-> result
;
3878 switch(type
-> class)
3880 case OBERON_TYPE_INTEGER
:
3881 case OBERON_TYPE_BOOLEAN
:
3882 case OBERON_TYPE_REAL
:
3883 case OBERON_TYPE_CHAR
:
3884 case OBERON_TYPE_SET
:
3885 size
= type
-> size
;
3888 oberon_error(ctx
, "TODO SIZE");
3892 expr
= oberon_integer_item(ctx
, size
);
3896 static oberon_expr_t
*
3897 oberon_make_abs_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3901 oberon_error(ctx
, "too few arguments");
3906 oberon_error(ctx
, "too mach arguments");
3909 oberon_expr_t
* arg
;
3911 oberon_check_src(ctx
, arg
);
3913 oberon_type_t
* result_type
;
3914 result_type
= arg
-> result
;
3916 if(result_type
-> class != OBERON_TYPE_INTEGER
)
3918 oberon_error(ctx
, "ABS accepts only integers");
3921 oberon_expr_t
* expr
;
3922 expr
= oberon_new_operator(OP_ABS
, result_type
, arg
, NULL
);
3927 oberon_make_new_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3931 oberon_error(ctx
, "too few arguments");
3935 oberon_expr_t
* dst
;
3937 oberon_check_dst(ctx
, dst
);
3939 oberon_type_t
* type
;
3940 type
= dst
-> result
;
3942 if(type
-> class != OBERON_TYPE_POINTER
)
3944 oberon_error(ctx
, "not a pointer");
3947 type
= type
-> base
;
3949 oberon_expr_t
* src
;
3950 src
= oberon_new_item(MODE_NEW
, dst
-> result
, 0);
3951 src
-> item
.num_args
= 0;
3952 src
-> item
.args
= NULL
;
3955 if(type
-> class == OBERON_TYPE_ARRAY
)
3957 if(type
-> size
== 0)
3959 oberon_type_t
* x
= type
;
3960 while(x
-> class == OBERON_TYPE_ARRAY
)
3970 if(num_args
< max_args
)
3972 oberon_error(ctx
, "too few arguments");
3975 if(num_args
> max_args
)
3977 oberon_error(ctx
, "too mach arguments");
3980 int num_sizes
= max_args
- 1;
3981 oberon_expr_t
* size_list
= list_args
-> next
;
3983 oberon_expr_t
* arg
= size_list
;
3984 for(int i
= 0; i
< max_args
- 1; i
++)
3986 oberon_check_src(ctx
, arg
);
3987 if(arg
-> result
-> class != OBERON_TYPE_INTEGER
)
3989 oberon_error(ctx
, "size must be integer");
3994 src
-> item
.num_args
= num_sizes
;
3995 src
-> item
.args
= size_list
;
3997 else if(type
-> class != OBERON_TYPE_RECORD
)
3999 oberon_error(ctx
, "oberon_make_new_call: wat");
4002 if(num_args
> max_args
)
4004 oberon_error(ctx
, "too mach arguments");
4007 oberon_assign(ctx
, src
, dst
);
4011 oberon_create_context(ModuleImportCallback import_module
)
4013 oberon_context_t
* ctx
= calloc(1, sizeof *ctx
);
4015 oberon_scope_t
* world_scope
;
4016 world_scope
= oberon_open_scope(ctx
);
4017 ctx
-> world_scope
= world_scope
;
4019 ctx
-> import_module
= import_module
;
4021 oberon_generator_init_context(ctx
);
4023 register_default_types(ctx
);
4026 oberon_new_intrinsic(ctx
, "ABS", oberon_make_abs_call
, NULL
);
4027 oberon_new_intrinsic(ctx
, "MIN", oberon_make_min_call
, NULL
);
4028 oberon_new_intrinsic(ctx
, "MAX", oberon_make_max_call
, NULL
);
4029 oberon_new_intrinsic(ctx
, "SIZE", oberon_make_size_call
, NULL
);
4032 oberon_new_intrinsic(ctx
, "NEW", NULL
, oberon_make_new_call
);
4038 oberon_destroy_context(oberon_context_t
* ctx
)
4040 oberon_generator_destroy_context(ctx
);
4045 oberon_compile_module(oberon_context_t
* ctx
, const char * newcode
)
4047 const char * code
= ctx
-> code
;
4048 int code_index
= ctx
-> code_index
;
4050 int token
= ctx
-> token
;
4051 char * string
= ctx
-> string
;
4052 int integer
= ctx
-> integer
;
4053 int real
= ctx
-> real
;
4054 bool longmode
= ctx
-> longmode
;
4055 oberon_scope_t
* decl
= ctx
-> decl
;
4056 oberon_module_t
* mod
= ctx
-> mod
;
4058 oberon_scope_t
* module_scope
;
4059 module_scope
= oberon_open_scope(ctx
);
4061 oberon_module_t
* module
;
4062 module
= calloc(1, sizeof *module
);
4063 module
-> decl
= module_scope
;
4064 module
-> next
= ctx
-> module_list
;
4066 ctx
-> mod
= module
;
4067 ctx
-> module_list
= module
;
4069 oberon_init_scaner(ctx
, newcode
);
4070 oberon_parse_module(ctx
);
4072 module
-> ready
= 1;
4075 ctx
-> code_index
= code_index
;
4077 ctx
-> token
= token
;
4078 ctx
-> string
= string
;
4079 ctx
-> integer
= integer
;
4081 ctx
-> longmode
= longmode
;