10 #include "../include/oberon.h"
12 #include "oberon-internals.h"
13 #include "generator.h"
84 // =======================================================================
86 // =======================================================================
89 oberon_error(oberon_context_t
* ctx
, const char * fmt
, ...)
93 fprintf(stderr
, "error: ");
94 vfprintf(stderr
, fmt
, ptr
);
95 fprintf(stderr
, "\n");
96 fprintf(stderr
, " code_index = %i\n", ctx
-> code_index
);
97 fprintf(stderr
, " c = %c\n", ctx
-> c
);
98 fprintf(stderr
, " token = %i\n", ctx
-> token
);
103 static oberon_type_t
*
104 oberon_new_type_ptr(int class)
106 oberon_type_t
* x
= malloc(sizeof *x
);
107 memset(x
, 0, sizeof *x
);
112 static oberon_type_t
*
113 oberon_new_type_integer(int size
)
116 x
= oberon_new_type_ptr(OBERON_TYPE_INTEGER
);
121 static oberon_type_t
*
122 oberon_new_type_boolean()
125 x
= oberon_new_type_ptr(OBERON_TYPE_BOOLEAN
);
129 static oberon_type_t
*
130 oberon_new_type_real(int size
)
133 x
= oberon_new_type_ptr(OBERON_TYPE_REAL
);
138 static oberon_type_t
*
139 oberon_new_type_char(int size
)
142 x
= oberon_new_type_ptr(OBERON_TYPE_CHAR
);
147 static oberon_type_t
*
148 oberon_new_type_string(int size
)
151 x
= oberon_new_type_ptr(OBERON_TYPE_STRING
);
156 static oberon_type_t
*
157 oberon_new_type_set(int size
)
160 x
= oberon_new_type_ptr(OBERON_TYPE_SET
);
165 // =======================================================================
167 // =======================================================================
169 static oberon_scope_t
*
170 oberon_open_scope(oberon_context_t
* ctx
)
172 oberon_scope_t
* scope
= calloc(1, sizeof *scope
);
173 oberon_object_t
* list
= calloc(1, sizeof *list
);
176 scope
-> list
= list
;
177 scope
-> up
= ctx
-> decl
;
181 scope
-> local
= scope
-> up
-> local
;
182 scope
-> parent
= scope
-> up
-> parent
;
183 scope
-> parent_type
= scope
-> up
-> parent_type
;
184 scope
-> exit_label
= scope
-> up
-> exit_label
;
192 oberon_close_scope(oberon_scope_t
* scope
)
194 oberon_context_t
* ctx
= scope
-> ctx
;
195 ctx
-> decl
= scope
-> up
;
198 static oberon_object_t
*
199 oberon_find_object_in_list(oberon_object_t
* list
, char * name
)
201 oberon_object_t
* x
= list
;
202 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
209 static oberon_object_t
*
210 oberon_find_object(oberon_scope_t
* scope
, char * name
, bool check_it
)
212 oberon_object_t
* result
= NULL
;
214 oberon_scope_t
* s
= scope
;
215 while(result
== NULL
&& s
!= NULL
)
217 result
= oberon_find_object_in_list(s
-> list
, name
);
221 if(check_it
&& result
== NULL
)
223 oberon_error(scope
-> ctx
, "undefined ident %s", name
);
229 static oberon_object_t
*
230 oberon_create_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
)
232 oberon_object_t
* newvar
= malloc(sizeof *newvar
);
233 memset(newvar
, 0, sizeof *newvar
);
234 newvar
-> name
= name
;
235 newvar
-> class = class;
236 newvar
-> export
= export
;
237 newvar
-> read_only
= read_only
;
238 newvar
-> local
= scope
-> local
;
239 newvar
-> parent
= scope
-> parent
;
240 newvar
-> parent_type
= scope
-> parent_type
;
241 newvar
-> module
= scope
-> ctx
-> mod
;
245 static oberon_object_t
*
246 oberon_define_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
, bool check_upscope
)
250 if(oberon_find_object(scope
-> up
, name
, false))
252 oberon_error(scope
-> ctx
, "already defined");
256 oberon_object_t
* x
= scope
-> list
;
257 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
264 oberon_error(scope
-> ctx
, "already defined");
267 oberon_object_t
* newvar
;
268 newvar
= oberon_create_object(scope
, name
, class, export
, read_only
);
274 static oberon_object_t
*
275 oberon_define_type(oberon_scope_t
* scope
, char * name
, oberon_type_t
* type
, int export
)
277 oberon_object_t
* id
;
278 id
= oberon_define_object(scope
, name
, OBERON_CLASS_TYPE
, export
, false, false);
280 oberon_generator_init_type(scope
-> ctx
, type
);
284 // =======================================================================
286 // =======================================================================
289 oberon_get_char(oberon_context_t
* ctx
)
291 if(ctx
-> code
[ctx
-> code_index
])
293 ctx
-> code_index
+= 1;
294 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
299 oberon_init_scaner(oberon_context_t
* ctx
, const char * code
)
302 ctx
-> code_index
= 0;
303 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
307 oberon_read_ident(oberon_context_t
* ctx
)
310 int i
= ctx
-> code_index
;
312 int c
= ctx
-> code
[i
];
320 char * ident
= malloc(len
+ 1);
321 memcpy(ident
, &ctx
->code
[ctx
->code_index
], len
);
324 ctx
-> code_index
= i
;
325 ctx
-> c
= ctx
-> code
[i
];
326 ctx
-> string
= ident
;
327 ctx
-> token
= IDENT
;
329 if(strcmp(ident
, "MODULE") == 0)
331 ctx
-> token
= MODULE
;
333 else if(strcmp(ident
, "END") == 0)
337 else if(strcmp(ident
, "VAR") == 0)
341 else if(strcmp(ident
, "BEGIN") == 0)
343 ctx
-> token
= BEGIN
;
345 else if(strcmp(ident
, "OR") == 0)
349 else if(strcmp(ident
, "DIV") == 0)
353 else if(strcmp(ident
, "MOD") == 0)
357 else if(strcmp(ident
, "PROCEDURE") == 0)
359 ctx
-> token
= PROCEDURE
;
361 else if(strcmp(ident
, "RETURN") == 0)
363 ctx
-> token
= RETURN
;
365 else if(strcmp(ident
, "CONST") == 0)
367 ctx
-> token
= CONST
;
369 else if(strcmp(ident
, "TYPE") == 0)
373 else if(strcmp(ident
, "ARRAY") == 0)
375 ctx
-> token
= ARRAY
;
377 else if(strcmp(ident
, "OF") == 0)
381 else if(strcmp(ident
, "RECORD") == 0)
383 ctx
-> token
= RECORD
;
385 else if(strcmp(ident
, "POINTER") == 0)
387 ctx
-> token
= POINTER
;
389 else if(strcmp(ident
, "TO") == 0)
393 else if(strcmp(ident
, "NIL") == 0)
397 else if(strcmp(ident
, "IMPORT") == 0)
399 ctx
-> token
= IMPORT
;
401 else if(strcmp(ident
, "IN") == 0)
405 else if(strcmp(ident
, "IS") == 0)
409 else if(strcmp(ident
, "IF") == 0)
413 else if(strcmp(ident
, "THEN") == 0)
417 else if(strcmp(ident
, "ELSE") == 0)
421 else if(strcmp(ident
, "ELSIF") == 0)
423 ctx
-> token
= ELSIF
;
425 else if(strcmp(ident
, "WHILE") == 0)
427 ctx
-> token
= WHILE
;
429 else if(strcmp(ident
, "DO") == 0)
433 else if(strcmp(ident
, "REPEAT") == 0)
435 ctx
-> token
= REPEAT
;
437 else if(strcmp(ident
, "UNTIL") == 0)
439 ctx
-> token
= UNTIL
;
441 else if(strcmp(ident
, "FOR") == 0)
445 else if(strcmp(ident
, "BY") == 0)
449 else if(strcmp(ident
, "LOOP") == 0)
453 else if(strcmp(ident
, "EXIT") == 0)
457 else if(strcmp(ident
, "CASE") == 0)
461 else if(strcmp(ident
, "WITH") == 0)
467 #define ISHEXDIGIT(x) \
468 (((x) >= '0' && (x) <= '9') || ((x) >= 'A' && (x) <= 'F'))
471 oberon_read_number(oberon_context_t
* ctx
)
484 * mode = 3 == LONGREAL
488 start_i
= ctx
-> code_index
;
490 while(isdigit(ctx
-> c
))
492 oberon_get_char(ctx
);
495 end_i
= ctx
-> code_index
;
497 if(ISHEXDIGIT(ctx
-> c
))
500 while(ISHEXDIGIT(ctx
-> c
))
502 oberon_get_char(ctx
);
505 end_i
= ctx
-> code_index
;
510 oberon_get_char(ctx
);
512 else if(ctx
-> c
== 'X')
515 oberon_get_char(ctx
);
519 oberon_error(ctx
, "invalid hex number");
522 else if(ctx
-> c
== '.')
524 oberon_get_char(ctx
);
527 /* Чит: избегаем конфликта с DOTDOT */
528 ctx
-> code_index
-= 1;
534 while(isdigit(ctx
-> c
))
536 oberon_get_char(ctx
);
539 if(ctx
-> c
== 'E' || ctx
-> c
== 'D')
541 exp_i
= ctx
-> code_index
;
548 oberon_get_char(ctx
);
550 if(ctx
-> c
== '+' || ctx
-> c
== '-')
552 oberon_get_char(ctx
);
555 while(isdigit(ctx
-> c
))
557 oberon_get_char(ctx
);
561 end_i
= ctx
-> code_index
;
569 oberon_get_char(ctx
);
571 else if(ctx
-> c
== 'X')
574 oberon_get_char(ctx
);
578 int len
= end_i
- start_i
;
579 ident
= malloc(len
+ 1);
580 memcpy(ident
, &ctx
-> code
[start_i
], len
);
583 ctx
-> longmode
= false;
586 int i
= exp_i
- start_i
;
588 ctx
-> longmode
= true;
594 integer
= atol(ident
);
596 ctx
-> token
= INTEGER
;
599 sscanf(ident
, "%lx", &integer
);
601 ctx
-> token
= INTEGER
;
605 sscanf(ident
, "%lf", &real
);
609 sscanf(ident
, "%lx", &integer
);
614 oberon_error(ctx
, "oberon_read_number: wat");
618 ctx
-> string
= ident
;
619 ctx
-> integer
= integer
;
624 oberon_skip_space(oberon_context_t
* ctx
)
626 while(isspace(ctx
-> c
))
628 oberon_get_char(ctx
);
633 oberon_read_comment(oberon_context_t
* ctx
)
640 oberon_get_char(ctx
);
643 oberon_get_char(ctx
);
647 else if(ctx
-> c
== '*')
649 oberon_get_char(ctx
);
652 oberon_get_char(ctx
);
656 else if(ctx
-> c
== 0)
658 oberon_error(ctx
, "unterminated comment");
662 oberon_get_char(ctx
);
667 static void oberon_read_string(oberon_context_t
* ctx
)
670 oberon_get_char(ctx
);
672 int start
= ctx
-> code_index
;
674 while(ctx
-> c
!= 0 && ctx
-> c
!= c
)
676 oberon_get_char(ctx
);
681 oberon_error(ctx
, "unterminated string");
684 int end
= ctx
-> code_index
;
686 oberon_get_char(ctx
);
688 char * string
= calloc(1, end
- start
+ 1);
689 strncpy(string
, &ctx
-> code
[start
], end
- start
);
691 ctx
-> token
= STRING
;
692 ctx
-> string
= string
;
695 static void oberon_read_token(oberon_context_t
* ctx
);
698 oberon_read_symbol(oberon_context_t
* ctx
)
707 ctx
-> token
= SEMICOLON
;
708 oberon_get_char(ctx
);
711 ctx
-> token
= COLON
;
712 oberon_get_char(ctx
);
715 ctx
-> token
= ASSIGN
;
716 oberon_get_char(ctx
);
721 oberon_get_char(ctx
);
724 ctx
-> token
= DOTDOT
;
725 oberon_get_char(ctx
);
729 ctx
-> token
= LPAREN
;
730 oberon_get_char(ctx
);
733 oberon_get_char(ctx
);
734 oberon_read_comment(ctx
);
735 oberon_read_token(ctx
);
739 ctx
-> token
= RPAREN
;
740 oberon_get_char(ctx
);
743 ctx
-> token
= EQUAL
;
744 oberon_get_char(ctx
);
748 oberon_get_char(ctx
);
752 oberon_get_char(ctx
);
756 oberon_get_char(ctx
);
760 ctx
-> token
= GREAT
;
761 oberon_get_char(ctx
);
765 oberon_get_char(ctx
);
770 oberon_get_char(ctx
);
773 ctx
-> token
= MINUS
;
774 oberon_get_char(ctx
);
778 oberon_get_char(ctx
);
781 oberon_get_char(ctx
);
782 oberon_error(ctx
, "unstarted comment");
786 ctx
-> token
= SLASH
;
787 oberon_get_char(ctx
);
791 oberon_get_char(ctx
);
795 oberon_get_char(ctx
);
798 ctx
-> token
= COMMA
;
799 oberon_get_char(ctx
);
802 ctx
-> token
= LBRACK
;
803 oberon_get_char(ctx
);
806 ctx
-> token
= RBRACK
;
807 oberon_get_char(ctx
);
810 ctx
-> token
= UPARROW
;
811 oberon_get_char(ctx
);
814 oberon_read_string(ctx
);
817 oberon_read_string(ctx
);
820 ctx
-> token
= LBRACE
;
821 oberon_get_char(ctx
);
824 ctx
-> token
= RBRACE
;
825 oberon_get_char(ctx
);
829 oberon_get_char(ctx
);
832 oberon_error(ctx
, "invalid char %c", ctx
-> c
);
838 oberon_read_token(oberon_context_t
* ctx
)
840 oberon_skip_space(ctx
);
845 oberon_read_ident(ctx
);
849 oberon_read_number(ctx
);
853 oberon_read_symbol(ctx
);
857 // =======================================================================
859 // =======================================================================
861 static void oberon_expect_token(oberon_context_t
* ctx
, int token
);
862 static oberon_expr_t
* oberon_expr(oberon_context_t
* ctx
);
863 static void oberon_assert_token(oberon_context_t
* ctx
, int token
);
864 static char * oberon_assert_ident(oberon_context_t
* ctx
);
865 static void oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
);
866 static oberon_item_t
* oberon_const_expr(oberon_context_t
* ctx
);
867 static oberon_expr_t
* oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
);
869 static oberon_expr_t
*
870 oberon_new_operator(int op
, oberon_type_t
* result
, oberon_expr_t
* left
, oberon_expr_t
* right
)
872 oberon_oper_t
* operator;
873 operator = malloc(sizeof *operator);
874 memset(operator, 0, sizeof *operator);
876 operator -> is_item
= 0;
877 operator -> result
= result
;
878 operator -> read_only
= 1;
880 operator -> left
= left
;
881 operator -> right
= right
;
883 return (oberon_expr_t
*) operator;
886 static oberon_expr_t
*
887 oberon_new_item(int mode
, oberon_type_t
* result
, int read_only
)
889 oberon_item_t
* item
;
890 item
= malloc(sizeof *item
);
891 memset(item
, 0, sizeof *item
);
894 item
-> result
= result
;
895 item
-> read_only
= read_only
;
898 return (oberon_expr_t
*)item
;
901 static oberon_expr_t
*
902 oberon_make_unary_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
)
904 oberon_expr_t
* expr
;
905 oberon_type_t
* result
;
907 result
= a
-> result
;
911 if(result
-> class == OBERON_TYPE_SET
)
913 expr
= oberon_new_operator(OP_COMPLEMENTATION
, result
, a
, NULL
);
915 else if(result
-> class == OBERON_TYPE_INTEGER
)
917 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
921 oberon_error(ctx
, "incompatible operator type");
924 else if(token
== NOT
)
926 if(result
-> class != OBERON_TYPE_BOOLEAN
)
928 oberon_error(ctx
, "incompatible operator type");
931 expr
= oberon_new_operator(OP_LOGIC_NOT
, result
, a
, NULL
);
935 oberon_error(ctx
, "oberon_make_unary_op: wat");
942 oberon_expr_list(oberon_context_t
* ctx
, int * num_expr
, oberon_expr_t
** first
, int const_expr
)
944 oberon_expr_t
* last
;
949 *first
= last
= (oberon_expr_t
*) oberon_const_expr(ctx
);
953 *first
= last
= oberon_expr(ctx
);
955 while(ctx
-> token
== COMMA
)
957 oberon_assert_token(ctx
, COMMA
);
958 oberon_expr_t
* current
;
962 current
= (oberon_expr_t
*) oberon_const_expr(ctx
);
966 current
= oberon_expr(ctx
);
969 last
-> next
= current
;
975 static oberon_expr_t
*
976 oberon_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
978 return oberon_new_operator(OP_CAST
, pref
, expr
, NULL
);
981 static oberon_expr_t
*
982 oberno_make_record_cast(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* rec
)
984 oberon_type_t
* from
= expr
-> result
;
985 oberon_type_t
* to
= rec
;
987 if(from
-> class == OBERON_TYPE_POINTER
&& to
-> class == OBERON_TYPE_POINTER
)
993 if(from
-> class != OBERON_TYPE_RECORD
|| to
-> class != OBERON_TYPE_RECORD
)
995 oberon_error(ctx
, "must be record type");
998 return oberon_cast_expr(ctx
, expr
, rec
);
1001 static oberon_type_t
*
1002 oberon_get_equal_expr_type(oberon_context_t
* ctx
, oberon_type_t
* a
, oberon_type_t
* b
)
1004 oberon_type_t
* result
;
1005 if(a
-> class == OBERON_TYPE_REAL
&& b
-> class == OBERON_TYPE_INTEGER
)
1009 else if(b
-> class == OBERON_TYPE_REAL
&& a
-> class == OBERON_TYPE_INTEGER
)
1013 else if(a
-> class != b
-> class)
1015 oberon_error(ctx
, "oberon_get_equal_expr_type: incompatible types");
1017 else if(a
-> size
> b
-> size
)
1030 oberon_check_record_compatibility(oberon_context_t
* ctx
, oberon_type_t
* from
, oberon_type_t
* to
)
1032 if(from
-> class == OBERON_TYPE_POINTER
&& to
-> class == OBERON_TYPE_POINTER
)
1034 from
= from
-> base
;
1038 if(from
-> class != OBERON_TYPE_RECORD
|| to
-> class != OBERON_TYPE_RECORD
)
1040 oberon_error(ctx
, "not a record");
1043 oberon_type_t
* t
= from
;
1044 while(t
!= NULL
&& t
!= to
)
1051 oberon_error(ctx
, "incompatible record types");
1056 oberon_check_dst(oberon_context_t
* ctx
, oberon_expr_t
* dst
)
1058 if(dst
-> is_item
== false)
1060 oberon_error(ctx
, "not variable");
1063 switch(dst
-> item
.mode
)
1074 oberon_error(ctx
, "not variable");
1080 oberon_check_src(oberon_context_t
* ctx
, oberon_expr_t
* src
)
1084 if(src
-> item
.mode
== MODE_TYPE
)
1086 oberon_error(ctx
, "not variable");
1091 static oberon_expr_t
*
1092 oberon_autocast_to(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1095 // Если классы типов равны
1096 // Если INTEGER переводится в REAL
1097 // Если STRING переводится в CHAR
1098 // Если STRING переводится в ARRAY OF CHAR
1099 // Если NIL переводится в POINTER
1100 // Если NIL переводится в PROCEDURE
1102 oberon_check_src(ctx
, expr
);
1105 if(pref
-> class != expr
-> result
-> class)
1107 if(expr
-> result
-> class == OBERON_TYPE_NIL
)
1109 if(pref
-> class != OBERON_TYPE_POINTER
1110 && pref
-> class != OBERON_TYPE_PROCEDURE
)
1115 else if(expr
-> result
-> class == OBERON_TYPE_STRING
)
1117 if(pref
-> class == OBERON_TYPE_CHAR
)
1119 if(expr
-> is_item
&& expr
-> item
.mode
== MODE_STRING
)
1121 if(strlen(expr
-> item
.string
) != 1)
1131 else if(pref
-> class == OBERON_TYPE_ARRAY
)
1133 if(pref
-> base
-> class != OBERON_TYPE_CHAR
)
1143 else if(expr
-> result
-> class == OBERON_TYPE_INTEGER
)
1145 if(pref
-> class != OBERON_TYPE_REAL
)
1158 oberon_error(ctx
, "oberon_autocast_to: incompatible types");
1161 if(pref
-> class == OBERON_TYPE_CHAR
)
1163 if(expr
-> result
-> class == OBERON_TYPE_STRING
)
1165 int c
= expr
-> item
.string
[0];
1166 expr
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
1167 expr
-> item
.integer
= c
;
1170 else if(pref
-> class == OBERON_TYPE_INTEGER
|| pref
-> class == OBERON_TYPE_REAL
)
1172 if(expr
-> result
-> size
> pref
-> size
)
1174 oberon_error(ctx
, "incompatible size");
1178 expr
= oberon_cast_expr(ctx
, expr
, pref
);
1181 else if(pref
-> class == OBERON_TYPE_RECORD
)
1183 oberon_check_record_compatibility(ctx
, expr
-> result
, pref
);
1184 expr
= oberno_make_record_cast(ctx
, expr
, pref
);
1186 else if(pref
-> class == OBERON_TYPE_POINTER
)
1188 assert(pref
-> base
);
1189 if(expr
-> result
-> class == OBERON_TYPE_NIL
)
1193 else if(expr
-> result
-> base
-> class == OBERON_TYPE_RECORD
)
1195 oberon_check_record_compatibility(ctx
, expr
-> result
, pref
);
1196 expr
= oberno_make_record_cast(ctx
, expr
, pref
);
1198 else if(expr
-> result
-> base
!= pref
-> base
)
1200 oberon_error(ctx
, "incompatible pointer types");
1208 oberon_autocast_binary_op(oberon_context_t
* ctx
, oberon_expr_t
** ea
, oberon_expr_t
** eb
)
1210 oberon_type_t
* a
= (*ea
) -> result
;
1211 oberon_type_t
* b
= (*eb
) -> result
;
1212 oberon_type_t
* preq
= oberon_get_equal_expr_type(ctx
, a
, b
);
1213 *ea
= oberon_autocast_to(ctx
, *ea
, preq
);
1214 *eb
= oberon_autocast_to(ctx
, *eb
, preq
);
1218 oberon_autocast_call(oberon_context_t
* ctx
, oberon_item_t
* desig
)
1220 if(desig
-> mode
!= MODE_CALL
)
1222 oberon_error(ctx
, "expected mode CALL");
1225 oberon_type_t
* fn
= desig
-> parent
-> result
;
1226 int num_args
= desig
-> num_args
;
1227 int num_decl
= fn
-> num_decl
;
1229 if(num_args
< num_decl
)
1231 oberon_error(ctx
, "too few arguments");
1233 else if(num_args
> num_decl
)
1235 oberon_error(ctx
, "too many arguments");
1238 /* Делаем проверку на запись и делаем автокаст */
1239 oberon_expr_t
* casted
[num_args
];
1240 oberon_expr_t
* arg
= desig
-> args
;
1241 oberon_object_t
* param
= fn
-> decl
;
1242 for(int i
= 0; i
< num_args
; i
++)
1244 if(param
-> class == OBERON_CLASS_VAR_PARAM
)
1246 if(arg
-> result
!= param
-> type
)
1248 oberon_error(ctx
, "incompatible type");
1250 if(arg
-> read_only
)
1252 oberon_error(ctx
, "assign to read-only var");
1258 casted
[i
] = oberon_autocast_to(ctx
, arg
, param
-> type
);
1262 param
= param
-> next
;
1265 /* Создаём новый список выражений */
1269 for(int i
= 0; i
< num_args
- 1; i
++)
1271 casted
[i
] -> next
= casted
[i
+ 1];
1273 desig
-> args
= arg
;
1277 static oberon_expr_t
*
1278 oberon_make_call_func(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1280 oberon_type_t
* signature
= item
-> result
;
1281 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1283 oberon_error(ctx
, "not a procedure");
1286 oberon_expr_t
* call
;
1288 if(signature
-> sysproc
)
1290 if(signature
-> genfunc
== NULL
)
1292 oberon_error(ctx
, "not a function-procedure");
1295 call
= signature
-> genfunc(ctx
, num_args
, list_args
);
1299 if(signature
-> base
-> class == OBERON_TYPE_NOTYPE
)
1301 oberon_error(ctx
, "attempt to call procedure in expression");
1304 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1305 call
-> item
.parent
= item
;
1306 call
-> item
.num_args
= num_args
;
1307 call
-> item
.args
= list_args
;
1308 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1315 oberon_make_call_proc(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1317 oberon_type_t
* signature
= item
-> result
;
1318 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1320 oberon_error(ctx
, "not a procedure");
1323 oberon_expr_t
* call
;
1325 if(signature
-> sysproc
)
1327 if(signature
-> genproc
== NULL
)
1329 oberon_error(ctx
, "not a procedure");
1332 signature
-> genproc(ctx
, num_args
, list_args
);
1336 if(signature
-> base
-> class != OBERON_TYPE_NOTYPE
)
1338 oberon_error(ctx
, "attempt to call function as non-typed procedure");
1341 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1342 call
-> item
.parent
= item
;
1343 call
-> item
.num_args
= num_args
;
1344 call
-> item
.args
= list_args
;
1345 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1346 oberon_generate_call_proc(ctx
, call
);
1354 || ((x) == INTEGER) \
1357 || ((x) == STRING) \
1359 || ((x) == LPAREN) \
1362 static oberon_expr_t
*
1363 oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1365 if(expr
-> result
-> class != OBERON_TYPE_POINTER
)
1367 oberon_error(ctx
, "not a pointer");
1370 assert(expr
-> is_item
);
1372 oberon_expr_t
* selector
;
1373 selector
= oberon_new_item(MODE_DEREF
, expr
-> result
-> base
, expr
-> read_only
);
1374 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1379 static oberon_expr_t
*
1380 oberon_make_array_selector(oberon_context_t
* ctx
, oberon_expr_t
* desig
, oberon_expr_t
* index
)
1382 if(desig
-> result
-> class == OBERON_TYPE_POINTER
)
1384 desig
= oberno_make_dereferencing(ctx
, desig
);
1387 assert(desig
-> is_item
);
1389 if(desig
-> result
-> class != OBERON_TYPE_ARRAY
)
1391 oberon_error(ctx
, "not array");
1394 oberon_type_t
* base
;
1395 base
= desig
-> result
-> base
;
1397 if(index
-> result
-> class != OBERON_TYPE_INTEGER
)
1399 oberon_error(ctx
, "index must be integer");
1402 // Статическая проверка границ массива
1403 if(desig
-> result
-> size
!= 0)
1405 if(index
-> is_item
)
1407 if(index
-> item
.mode
== MODE_INTEGER
)
1409 int arr_size
= desig
-> result
-> size
;
1410 int index_int
= index
-> item
.integer
;
1411 if(index_int
< 0 || index_int
> arr_size
- 1)
1413 oberon_error(ctx
, "not in range (dimension size 0..%i)", arr_size
- 1);
1419 oberon_expr_t
* selector
;
1420 selector
= oberon_new_item(MODE_INDEX
, base
, desig
-> read_only
);
1421 selector
-> item
.parent
= (oberon_item_t
*) desig
;
1422 selector
-> item
.num_args
= 1;
1423 selector
-> item
.args
= index
;
1428 static oberon_expr_t
*
1429 oberon_make_record_selector(oberon_context_t
* ctx
, oberon_expr_t
* expr
, char * name
)
1431 if(expr
-> result
-> class == OBERON_TYPE_POINTER
)
1433 expr
= oberno_make_dereferencing(ctx
, expr
);
1436 assert(expr
-> is_item
);
1438 if(expr
-> result
-> class != OBERON_TYPE_RECORD
)
1440 oberon_error(ctx
, "not record");
1443 oberon_type_t
* rec
= expr
-> result
;
1445 oberon_object_t
* field
;
1446 field
= oberon_find_object(rec
-> scope
, name
, true);
1448 if(field
-> export
== 0)
1450 if(field
-> module
!= ctx
-> mod
)
1452 oberon_error(ctx
, "field not exported");
1456 int read_only
= expr
-> read_only
;
1457 if(field
-> read_only
)
1459 if(field
-> module
!= ctx
-> mod
)
1465 oberon_expr_t
* selector
;
1466 selector
= oberon_new_item(MODE_FIELD
, field
-> type
, read_only
);
1467 selector
-> item
.var
= field
;
1468 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1473 #define ISSELECTOR(x) \
1476 || ((x) == UPARROW) \
1479 static oberon_object_t
*
1480 oberon_qualident(oberon_context_t
* ctx
, char ** xname
, int check
)
1483 oberon_object_t
* x
;
1485 name
= oberon_assert_ident(ctx
);
1486 x
= oberon_find_object(ctx
-> decl
, name
, check
);
1490 if(x
-> class == OBERON_CLASS_MODULE
)
1492 oberon_assert_token(ctx
, DOT
);
1493 name
= oberon_assert_ident(ctx
);
1494 /* Наличие объектов в левых модулях всегда проверяется */
1495 x
= oberon_find_object(x
-> module
-> decl
, name
, 1);
1497 if(x
-> export
== 0)
1499 oberon_error(ctx
, "not exported");
1512 static oberon_expr_t
*
1513 oberon_ident_item(oberon_context_t
* ctx
, char * name
)
1516 oberon_object_t
* x
;
1517 oberon_expr_t
* expr
;
1519 x
= oberon_find_object(ctx
-> decl
, name
, true);
1522 if(x
-> class == OBERON_CLASS_CONST
|| x
-> class == OBERON_CLASS_PROC
)
1527 expr
= oberon_new_item(MODE_VAR
, x
-> type
, read_only
);
1528 expr
-> item
.var
= x
;
1532 static oberon_expr_t
*
1533 oberon_qualident_expr(oberon_context_t
* ctx
)
1535 oberon_object_t
* var
;
1536 oberon_expr_t
* expr
;
1538 var
= oberon_qualident(ctx
, NULL
, 1);
1541 if(var
-> read_only
)
1543 if(var
-> module
!= ctx
-> mod
)
1549 switch(var
-> class)
1551 case OBERON_CLASS_CONST
:
1553 expr
= (oberon_expr_t
*) var
-> value
;
1555 case OBERON_CLASS_TYPE
:
1556 expr
= oberon_new_item(MODE_TYPE
, var
-> type
, read_only
);
1558 case OBERON_CLASS_VAR
:
1559 case OBERON_CLASS_VAR_PARAM
:
1560 case OBERON_CLASS_PARAM
:
1561 expr
= oberon_new_item(MODE_VAR
, var
-> type
, read_only
);
1563 case OBERON_CLASS_PROC
:
1564 expr
= oberon_new_item(MODE_VAR
, var
-> type
, true);
1567 oberon_error(ctx
, "invalid designator");
1571 expr
-> item
.var
= var
;
1577 oberon_check_type_guard(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* type
)
1579 /* Охрана типа применима, если */
1580 /* 1. v - параметр-переменная типа запись, или v - указатель, и если */
1581 /* 2. T - расширение статического типа v */
1584 && expr
-> item
.mode
== MODE_VAR
1585 && expr
-> item
.var
-> class == OBERON_CLASS_VAR_PARAM
)
1589 else if(expr
-> result
-> class == OBERON_TYPE_POINTER
1590 || expr
-> result
-> class == OBERON_TYPE_RECORD
)
1596 oberon_error(ctx
, "guard type used only with var-param or pointers");
1599 oberon_check_record_compatibility(ctx
, type
, expr
-> result
);
1602 static oberon_expr_t
*
1603 oberon_make_type_guard(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_object_t
* objtype
)
1605 oberon_type_t
* type
;
1607 if(objtype
-> class != OBERON_CLASS_TYPE
)
1609 oberon_error(ctx
, "must be type");
1611 type
= objtype
-> type
;
1613 oberon_check_type_guard(ctx
, expr
, type
);
1614 return oberno_make_record_cast(ctx
, expr
, objtype
-> type
);
1617 static oberon_expr_t
*
1618 oberon_designator(oberon_context_t
* ctx
)
1621 oberon_expr_t
* expr
;
1622 oberon_object_t
* objtype
;
1624 expr
= oberon_qualident_expr(ctx
);
1626 while(expr
-> result
-> class != OBERON_TYPE_PROCEDURE
&& ISSELECTOR(ctx
-> token
))
1628 switch(ctx
-> token
)
1631 oberon_assert_token(ctx
, DOT
);
1632 name
= oberon_assert_ident(ctx
);
1633 expr
= oberon_make_record_selector(ctx
, expr
, name
);
1636 oberon_assert_token(ctx
, LBRACK
);
1637 int num_indexes
= 0;
1638 oberon_expr_t
* indexes
= NULL
;
1639 oberon_expr_list(ctx
, &num_indexes
, &indexes
, 0);
1640 oberon_assert_token(ctx
, RBRACK
);
1642 for(int i
= 0; i
< num_indexes
; i
++)
1644 expr
= oberon_make_array_selector(ctx
, expr
, indexes
);
1645 indexes
= indexes
-> next
;
1649 oberon_assert_token(ctx
, UPARROW
);
1650 expr
= oberno_make_dereferencing(ctx
, expr
);
1653 oberon_assert_token(ctx
, LPAREN
);
1654 objtype
= oberon_qualident(ctx
, NULL
, true);
1655 oberon_assert_token(ctx
, RPAREN
);
1656 expr
= oberon_make_type_guard(ctx
, expr
, objtype
);
1659 oberon_error(ctx
, "oberon_designator: wat");
1667 static oberon_expr_t
*
1668 oberon_opt_func_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1670 /* Если есть скобки - значит вызов. Если нет, то передаём указатель. */
1671 if(ctx
-> token
== LPAREN
)
1673 oberon_assert_token(ctx
, LPAREN
);
1676 oberon_expr_t
* arguments
= NULL
;
1678 if(ISEXPR(ctx
-> token
))
1680 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1683 assert(expr
-> is_item
== 1);
1684 expr
= oberon_make_call_func(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1686 oberon_assert_token(ctx
, RPAREN
);
1693 oberon_opt_proc_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1695 assert(expr
-> is_item
);
1698 oberon_expr_t
* arguments
= NULL
;
1700 if(ctx
-> token
== LPAREN
)
1702 oberon_assert_token(ctx
, LPAREN
);
1704 if(ISEXPR(ctx
-> token
))
1706 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1709 oberon_assert_token(ctx
, RPAREN
);
1712 /* Вызов происходит даже без скобок */
1713 oberon_make_call_proc(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1716 static oberon_type_t
*
1717 oberon_get_type_of_int_value(oberon_context_t
* ctx
, int64_t i
)
1719 if(i
>= -128 && i
<= 127)
1721 return ctx
-> byte_type
;
1723 else if(i
>= -32768 && i
<= 32767)
1725 return ctx
-> shortint_type
;
1727 else if(i
>= -2147483648 && i
<= 2147483647)
1729 return ctx
-> int_type
;
1733 return ctx
-> longint_type
;
1737 static oberon_expr_t
*
1738 oberon_integer_item(oberon_context_t
* ctx
, int64_t i
)
1740 oberon_expr_t
* expr
;
1741 oberon_type_t
* result
;
1742 result
= oberon_get_type_of_int_value(ctx
, i
);
1743 expr
= oberon_new_item(MODE_INTEGER
, result
, true);
1744 expr
-> item
.integer
= i
;
1748 static oberon_expr_t
*
1749 oberon_element(oberon_context_t
* ctx
)
1754 e1
= oberon_expr(ctx
);
1755 if(e1
-> result
-> class != OBERON_TYPE_INTEGER
)
1757 oberon_error(ctx
, "expected integer");
1761 if(ctx
-> token
== DOTDOT
)
1763 oberon_assert_token(ctx
, DOTDOT
);
1764 e2
= oberon_expr(ctx
);
1765 if(e2
-> result
-> class != OBERON_TYPE_INTEGER
)
1767 oberon_error(ctx
, "expected integer");
1771 oberon_expr_t
* set
;
1772 set
= oberon_new_operator(OP_RANGE
, ctx
-> set_type
, e1
, e2
);
1776 static oberon_expr_t
*
1777 oberon_set(oberon_context_t
* ctx
)
1779 oberon_expr_t
* set
;
1780 oberon_expr_t
* elements
;
1781 set
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
1782 set
-> item
.integer
= 0;
1784 oberon_assert_token(ctx
, LBRACE
);
1785 if(ISEXPR(ctx
-> token
))
1787 elements
= oberon_element(ctx
);
1788 set
= oberon_new_operator(OP_UNION
, ctx
-> set_type
, set
, elements
);
1789 while(ctx
-> token
== COMMA
)
1791 oberon_assert_token(ctx
, COMMA
);
1792 elements
= oberon_element(ctx
);
1793 set
= oberon_new_operator(OP_UNION
, ctx
-> set_type
, set
, elements
);
1796 oberon_assert_token(ctx
, RBRACE
);
1801 static oberon_expr_t
*
1802 oberon_make_boolean(oberon_context_t
* ctx
, bool cond
)
1804 oberon_expr_t
* expr
;
1805 expr
= oberon_new_item(MODE_BOOLEAN
, ctx
-> bool_type
, true);
1806 expr
-> item
.integer
= cond
;
1810 static oberon_expr_t
*
1811 oberon_factor(oberon_context_t
* ctx
)
1813 oberon_expr_t
* expr
;
1814 oberon_type_t
* result
;
1816 switch(ctx
-> token
)
1819 expr
= oberon_designator(ctx
);
1820 expr
= oberon_opt_func_parens(ctx
, expr
);
1823 expr
= oberon_integer_item(ctx
, ctx
-> integer
);
1824 oberon_assert_token(ctx
, INTEGER
);
1827 result
= ctx
-> char_type
;
1828 expr
= oberon_new_item(MODE_CHAR
, result
, true);
1829 expr
-> item
.integer
= ctx
-> integer
;
1830 oberon_assert_token(ctx
, CHAR
);
1833 result
= ctx
-> string_type
;
1834 expr
= oberon_new_item(MODE_STRING
, result
, true);
1835 expr
-> item
.string
= ctx
-> string
;
1836 oberon_assert_token(ctx
, STRING
);
1839 result
= (ctx
-> longmode
) ? (ctx
-> longreal_type
) : (ctx
-> real_type
);
1840 expr
= oberon_new_item(MODE_REAL
, result
, 1);
1841 expr
-> item
.real
= ctx
-> real
;
1842 oberon_assert_token(ctx
, REAL
);
1845 expr
= oberon_set(ctx
);
1848 oberon_assert_token(ctx
, LPAREN
);
1849 expr
= oberon_expr(ctx
);
1850 oberon_assert_token(ctx
, RPAREN
);
1853 oberon_assert_token(ctx
, NOT
);
1854 expr
= oberon_factor(ctx
);
1855 expr
= oberon_make_unary_op(ctx
, NOT
, expr
);
1858 oberon_assert_token(ctx
, NIL
);
1859 expr
= oberon_new_item(MODE_NIL
, ctx
-> nil_type
, true);
1862 oberon_error(ctx
, "invalid expression");
1869 oberon_autocast_to_real(oberon_context_t
* ctx
, oberon_expr_t
** e
)
1871 oberon_expr_t
* expr
= *e
;
1872 if(expr
-> result
-> class == OBERON_TYPE_INTEGER
)
1874 if(expr
-> result
-> size
<= ctx
-> real_type
-> size
)
1876 *e
= oberon_cast_expr(ctx
, expr
, ctx
-> real_type
);
1880 *e
= oberon_cast_expr(ctx
, expr
, ctx
-> longreal_type
);
1883 else if(expr
-> result
-> class != OBERON_TYPE_REAL
)
1885 oberon_error(ctx
, "required numeric type");
1890 oberon_is_numeric_type(oberon_type_t
* t
)
1892 return (t
-> class == OBERON_TYPE_INTEGER
) || (t
-> class == OBERON_TYPE_REAL
);
1896 oberon_is_char_type(oberon_type_t
* t
)
1898 return (t
-> class == OBERON_TYPE_CHAR
);
1902 oberon_is_string_type(oberon_type_t
* t
)
1904 return (t
-> class == OBERON_TYPE_STRING
)
1905 || (t
-> class == OBERON_TYPE_ARRAY
&& t
-> base
-> class == OBERON_TYPE_CHAR
);
1909 oberon_is_boolean_type(oberon_type_t
* t
)
1911 return (t
-> class == OBERON_TYPE_BOOLEAN
);
1915 oberon_is_set_type(oberon_type_t
* t
)
1917 return (t
-> class == OBERON_TYPE_SET
);
1921 oberon_is_pointer_type(oberon_type_t
* t
)
1923 return (t
-> class == OBERON_TYPE_POINTER
) || (t
-> class == OBERON_TYPE_NIL
);
1927 oberon_is_procedure_type(oberon_type_t
* t
)
1929 return (t
-> class == OBERON_TYPE_POINTER
) || (t
-> class == OBERON_TYPE_NIL
);
1932 static oberon_expr_t
*
1933 oberon_make_bin_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1935 oberon_expr_t
* expr
;
1936 oberon_type_t
* result
;
1941 if(a
-> result
-> class != OBERON_TYPE_INTEGER
)
1943 oberon_error(ctx
, "must be integer");
1946 if(b
-> result
-> class != OBERON_TYPE_SET
)
1948 oberon_error(ctx
, "must be set");
1951 result
= ctx
-> bool_type
;
1952 expr
= oberon_new_operator(OP_IN
, result
, a
, b
);
1954 else if(token
== IS
)
1956 if(b
-> is_item
== false || b
-> item
.mode
!= MODE_TYPE
)
1958 oberon_error(ctx
, "requires type");
1961 result
= ctx
-> bool_type
;
1962 oberon_check_type_guard(ctx
, a
, b
-> result
);
1963 expr
= oberon_new_operator(OP_IS
, result
, a
, b
);
1965 else if((token
>= EQUAL
&& token
<= GEQ
) || token
== OR
|| token
== AND
)
1967 if(token
>= LESS
&& token
<= GEQ
)
1969 if(oberon_is_numeric_type(a
-> result
) && oberon_is_numeric_type(b
-> result
))
1973 else if(oberon_is_char_type(a
-> result
) && oberon_is_char_type(b
-> result
))
1977 else if(oberon_is_string_type(a
-> result
) && oberon_is_string_type(b
-> result
))
1983 oberon_error(ctx
, "invalid comparation");
1986 else if(token
== EQUAL
|| token
== NEQ
)
1988 if(oberon_is_numeric_type(a
-> result
) && oberon_is_numeric_type(b
-> result
))
1992 else if(oberon_is_char_type(a
-> result
) && oberon_is_char_type(b
-> result
))
1996 else if(oberon_is_string_type(a
-> result
) && oberon_is_string_type(b
-> result
))
2000 else if(oberon_is_boolean_type(a
-> result
) && oberon_is_boolean_type(b
-> result
))
2004 else if(oberon_is_set_type(a
-> result
) && oberon_is_set_type(b
-> result
))
2008 else if(oberon_is_pointer_type(a
-> result
) && oberon_is_pointer_type(b
-> result
))
2012 else if(oberon_is_procedure_type(a
-> result
) && oberon_is_procedure_type(b
-> result
))
2018 oberon_error(ctx
, "invalid comparation");
2021 else if(token
== AND
|| token
== OR
)
2023 if(!oberon_is_boolean_type(a
-> result
) || !oberon_is_boolean_type(b
-> result
))
2025 oberon_error(ctx
, "invalid comparation");
2030 oberon_error(ctx
, "wat");
2033 oberon_autocast_binary_op(ctx
, &a
, &b
);
2034 result
= ctx
-> bool_type
;
2038 expr
= oberon_new_operator(OP_EQ
, result
, a
, b
);
2040 else if(token
== NEQ
)
2042 expr
= oberon_new_operator(OP_NEQ
, result
, a
, b
);
2044 else if(token
== LESS
)
2046 expr
= oberon_new_operator(OP_LSS
, result
, a
, b
);
2048 else if(token
== LEQ
)
2050 expr
= oberon_new_operator(OP_LEQ
, result
, a
, b
);
2052 else if(token
== GREAT
)
2054 expr
= oberon_new_operator(OP_GRT
, result
, a
, b
);
2056 else if(token
== GEQ
)
2058 expr
= oberon_new_operator(OP_GEQ
, result
, a
, b
);
2060 else if(token
== OR
)
2062 expr
= oberon_new_operator(OP_LOGIC_OR
, result
, a
, b
);
2064 else if(token
== AND
)
2066 expr
= oberon_new_operator(OP_LOGIC_AND
, result
, a
, b
);
2070 oberon_error(ctx
, "oberon_make_bin_op: bool wat");
2073 else if(token
== SLASH
)
2075 if(a
-> result
-> class == OBERON_TYPE_SET
2076 || b
-> result
-> class == OBERON_TYPE_SET
)
2078 oberon_autocast_binary_op(ctx
, &a
, &b
);
2079 result
= a
-> result
;
2080 expr
= oberon_new_operator(OP_SYM_DIFFERENCE
, result
, a
, b
);
2084 oberon_autocast_to_real(ctx
, &a
);
2085 oberon_autocast_to_real(ctx
, &b
);
2086 oberon_autocast_binary_op(ctx
, &a
, &b
);
2087 result
= a
-> result
;
2088 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
2091 else if(token
== DIV
)
2093 if(a
-> result
-> class != OBERON_TYPE_INTEGER
2094 || b
-> result
-> class != OBERON_TYPE_INTEGER
)
2096 oberon_error(ctx
, "operator DIV requires integer type");
2099 oberon_autocast_binary_op(ctx
, &a
, &b
);
2100 expr
= oberon_new_operator(OP_DIV
, a
-> result
, a
, b
);
2104 oberon_autocast_binary_op(ctx
, &a
, &b
);
2105 result
= a
-> result
;
2106 if(result
-> class == OBERON_TYPE_SET
)
2111 expr
= oberon_new_operator(OP_UNION
, result
, a
, b
);
2114 expr
= oberon_new_operator(OP_DIFFERENCE
, result
, a
, b
);
2117 expr
= oberon_new_operator(OP_INTERSECTION
, result
, a
, b
);
2124 else if(result
-> class == OBERON_TYPE_INTEGER
2125 || result
-> class == OBERON_TYPE_REAL
)
2130 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
2133 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
2136 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
2139 expr
= oberon_new_operator(OP_MOD
, result
, a
, b
);
2154 oberon_error(ctx
, "invalid operation");
2160 #define ISMULOP(x) \
2161 ((x) >= STAR && (x) <= AND)
2163 static oberon_expr_t
*
2164 oberon_term_expr(oberon_context_t
* ctx
)
2166 oberon_expr_t
* expr
;
2168 expr
= oberon_factor(ctx
);
2169 while(ISMULOP(ctx
-> token
))
2171 int token
= ctx
-> token
;
2172 oberon_read_token(ctx
);
2174 oberon_expr_t
* inter
= oberon_factor(ctx
);
2175 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2181 #define ISADDOP(x) \
2182 ((x) >= PLUS && (x) <= OR)
2184 static oberon_expr_t
*
2185 oberon_simple_expr(oberon_context_t
* ctx
)
2187 oberon_expr_t
* expr
;
2190 if(ctx
-> token
== PLUS
)
2193 oberon_assert_token(ctx
, PLUS
);
2195 else if(ctx
-> token
== MINUS
)
2198 oberon_assert_token(ctx
, MINUS
);
2201 expr
= oberon_term_expr(ctx
);
2205 expr
= oberon_make_unary_op(ctx
, MINUS
, expr
);
2208 while(ISADDOP(ctx
-> token
))
2210 int token
= ctx
-> token
;
2211 oberon_read_token(ctx
);
2213 oberon_expr_t
* inter
= oberon_term_expr(ctx
);
2214 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2220 #define ISRELATION(x) \
2221 ((x) >= EQUAL && (x) <= IS)
2223 static oberon_expr_t
*
2224 oberon_expr(oberon_context_t
* ctx
)
2226 oberon_expr_t
* expr
;
2228 expr
= oberon_simple_expr(ctx
);
2229 while(ISRELATION(ctx
-> token
))
2231 int token
= ctx
-> token
;
2232 oberon_read_token(ctx
);
2234 oberon_expr_t
* inter
= oberon_simple_expr(ctx
);
2235 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2242 oberon_check_const(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2244 if(expr
-> is_item
== 0)
2246 oberon_error(ctx
, "const expression are required");
2249 switch(expr
-> item
.mode
)
2261 oberon_error(ctx
, "const expression are required");
2266 static oberon_item_t
*
2267 oberon_const_expr(oberon_context_t
* ctx
)
2269 oberon_expr_t
* expr
;
2270 expr
= oberon_expr(ctx
);
2271 oberon_check_const(ctx
, expr
);
2272 return (oberon_item_t
*) expr
;
2275 // =======================================================================
2277 // =======================================================================
2279 static void oberon_decl_seq(oberon_context_t
* ctx
);
2280 static void oberon_statement_seq(oberon_context_t
* ctx
);
2281 static void oberon_initialize_decl(oberon_context_t
* ctx
);
2284 oberon_expect_token(oberon_context_t
* ctx
, int token
)
2286 if(ctx
-> token
!= token
)
2288 oberon_error(ctx
, "unexpected token %i (%i)", ctx
-> token
, token
);
2293 oberon_assert_token(oberon_context_t
* ctx
, int token
)
2295 oberon_expect_token(ctx
, token
);
2296 oberon_read_token(ctx
);
2300 oberon_assert_ident(oberon_context_t
* ctx
)
2302 oberon_expect_token(ctx
, IDENT
);
2303 char * ident
= ctx
-> string
;
2304 oberon_read_token(ctx
);
2309 oberon_def(oberon_context_t
* ctx
, int * export
, int * read_only
)
2311 switch(ctx
-> token
)
2314 oberon_assert_token(ctx
, STAR
);
2319 oberon_assert_token(ctx
, MINUS
);
2330 static oberon_object_t
*
2331 oberon_ident_def(oberon_context_t
* ctx
, int class, bool check_upscope
)
2336 oberon_object_t
* x
;
2338 name
= oberon_assert_ident(ctx
);
2339 oberon_def(ctx
, &export
, &read_only
);
2341 x
= oberon_define_object(ctx
-> decl
, name
, class, export
, read_only
, check_upscope
);
2346 oberon_ident_list(oberon_context_t
* ctx
, int class, bool check_upscope
, int * num
, oberon_object_t
** list
)
2349 *list
= oberon_ident_def(ctx
, class, check_upscope
);
2350 while(ctx
-> token
== COMMA
)
2352 oberon_assert_token(ctx
, COMMA
);
2353 oberon_ident_def(ctx
, class, check_upscope
);
2359 oberon_var_decl(oberon_context_t
* ctx
)
2362 oberon_object_t
* list
;
2363 oberon_type_t
* type
;
2364 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2366 oberon_ident_list(ctx
, OBERON_CLASS_VAR
, false, &num
, &list
);
2367 oberon_assert_token(ctx
, COLON
);
2368 oberon_type(ctx
, &type
);
2370 oberon_object_t
* var
= list
;
2371 for(int i
= 0; i
< num
; i
++)
2378 static oberon_object_t
*
2379 oberon_fp_section(oberon_context_t
* ctx
, int * num_decl
)
2381 int class = OBERON_CLASS_PARAM
;
2382 if(ctx
-> token
== VAR
)
2384 oberon_read_token(ctx
);
2385 class = OBERON_CLASS_VAR_PARAM
;
2389 oberon_object_t
* list
;
2390 oberon_ident_list(ctx
, class, false, &num
, &list
);
2392 oberon_assert_token(ctx
, COLON
);
2394 oberon_type_t
* type
;
2395 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2396 oberon_type(ctx
, &type
);
2398 oberon_object_t
* param
= list
;
2399 for(int i
= 0; i
< num
; i
++)
2401 param
-> type
= type
;
2402 param
= param
-> next
;
2409 #define ISFPSECTION \
2410 ((ctx -> token == VAR) || (ctx -> token == IDENT))
2413 oberon_formal_pars(oberon_context_t
* ctx
, oberon_type_t
* signature
)
2415 oberon_assert_token(ctx
, LPAREN
);
2419 signature
-> decl
= oberon_fp_section(ctx
, &signature
-> num_decl
);
2420 while(ctx
-> token
== SEMICOLON
)
2422 oberon_assert_token(ctx
, SEMICOLON
);
2423 oberon_fp_section(ctx
, &signature
-> num_decl
);
2427 oberon_assert_token(ctx
, RPAREN
);
2429 if(ctx
-> token
== COLON
)
2431 oberon_assert_token(ctx
, COLON
);
2433 oberon_object_t
* typeobj
;
2434 typeobj
= oberon_qualident(ctx
, NULL
, 1);
2435 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2437 oberon_error(ctx
, "function result is not type");
2439 signature
-> base
= typeobj
-> type
;
2444 oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
)
2446 oberon_type_t
* signature
;
2448 signature
-> class = OBERON_TYPE_PROCEDURE
;
2449 signature
-> num_decl
= 0;
2450 signature
-> base
= ctx
-> notype_type
;
2451 signature
-> decl
= NULL
;
2453 if(ctx
-> token
== LPAREN
)
2455 oberon_formal_pars(ctx
, signature
);
2460 oberon_compare_signatures(oberon_context_t
* ctx
, oberon_type_t
* a
, oberon_type_t
* b
)
2462 if(a
-> num_decl
!= b
-> num_decl
)
2464 oberon_error(ctx
, "number parameters not matched");
2467 int num_param
= a
-> num_decl
;
2468 oberon_object_t
* param_a
= a
-> decl
;
2469 oberon_object_t
* param_b
= b
-> decl
;
2470 for(int i
= 0; i
< num_param
; i
++)
2472 if(strcmp(param_a
-> name
, param_b
-> name
) != 0)
2474 oberon_error(ctx
, "param %i name not matched", i
+ 1);
2477 if(param_a
-> type
!= param_b
-> type
)
2479 oberon_error(ctx
, "param %i type not matched", i
+ 1);
2482 param_a
= param_a
-> next
;
2483 param_b
= param_b
-> next
;
2488 oberon_make_return(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2490 oberon_object_t
* proc
= ctx
-> decl
-> parent
;
2491 oberon_type_t
* result_type
= proc
-> type
-> base
;
2493 if(result_type
-> class == OBERON_TYPE_NOTYPE
)
2497 oberon_error(ctx
, "procedure has no result type");
2504 oberon_error(ctx
, "procedure requires expression on result");
2507 expr
= oberon_autocast_to(ctx
, expr
, result_type
);
2510 proc
-> has_return
= 1;
2512 oberon_generate_return(ctx
, expr
);
2516 oberon_proc_decl_body(oberon_context_t
* ctx
, oberon_object_t
* proc
)
2518 oberon_assert_token(ctx
, SEMICOLON
);
2520 ctx
-> decl
= proc
-> scope
;
2522 oberon_decl_seq(ctx
);
2524 oberon_generate_begin_proc(ctx
, proc
);
2526 if(ctx
-> token
== BEGIN
)
2528 oberon_assert_token(ctx
, BEGIN
);
2529 oberon_statement_seq(ctx
);
2532 oberon_assert_token(ctx
, END
);
2533 char * name
= oberon_assert_ident(ctx
);
2534 if(strcmp(name
, proc
-> name
) != 0)
2536 oberon_error(ctx
, "procedure name not matched");
2539 if(proc
-> type
-> base
-> class == OBERON_TYPE_NOTYPE
2540 && proc
-> has_return
== 0)
2542 oberon_make_return(ctx
, NULL
);
2545 if(proc
-> has_return
== 0)
2547 oberon_error(ctx
, "procedure requires return");
2550 oberon_generate_end_proc(ctx
);
2551 oberon_close_scope(ctx
-> decl
);
2555 oberon_proc_decl(oberon_context_t
* ctx
)
2557 oberon_assert_token(ctx
, PROCEDURE
);
2560 if(ctx
-> token
== UPARROW
)
2562 oberon_assert_token(ctx
, UPARROW
);
2569 name
= oberon_assert_ident(ctx
);
2570 oberon_def(ctx
, &export
, &read_only
);
2572 oberon_scope_t
* proc_scope
;
2573 proc_scope
= oberon_open_scope(ctx
);
2574 ctx
-> decl
-> local
= 1;
2576 oberon_type_t
* signature
;
2577 signature
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2578 oberon_opt_formal_pars(ctx
, &signature
);
2580 //oberon_initialize_decl(ctx);
2581 oberon_generator_init_type(ctx
, signature
);
2582 oberon_close_scope(ctx
-> decl
);
2584 oberon_object_t
* proc
;
2585 proc
= oberon_find_object(ctx
-> decl
, name
, 0);
2588 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, export
, read_only
, false);
2589 proc
-> type
= signature
;
2590 proc
-> scope
= proc_scope
;
2591 oberon_generator_init_proc(ctx
, proc
);
2595 if(proc
-> class != OBERON_CLASS_PROC
)
2597 oberon_error(ctx
, "mult definition");
2604 oberon_error(ctx
, "mult procedure definition");
2608 if(proc
-> export
!= export
|| proc
-> read_only
!= read_only
)
2610 oberon_error(ctx
, "export type not matched");
2613 oberon_compare_signatures(ctx
, proc
-> type
, signature
);
2616 proc_scope
-> parent
= proc
;
2617 oberon_object_t
* param
= proc_scope
-> list
-> next
;
2620 param
-> parent
= proc
;
2621 param
= param
-> next
;
2627 oberon_proc_decl_body(ctx
, proc
);
2632 oberon_const_decl(oberon_context_t
* ctx
)
2634 oberon_item_t
* value
;
2635 oberon_object_t
* constant
;
2637 constant
= oberon_ident_def(ctx
, OBERON_CLASS_CONST
, false);
2638 oberon_assert_token(ctx
, EQUAL
);
2639 value
= oberon_const_expr(ctx
);
2640 constant
-> value
= value
;
2644 oberon_make_array_type(oberon_context_t
* ctx
, oberon_expr_t
* size
, oberon_type_t
* base
, oberon_type_t
** type
)
2646 if(size
-> is_item
== 0)
2648 oberon_error(ctx
, "requires constant");
2651 if(size
-> item
.mode
!= MODE_INTEGER
)
2653 oberon_error(ctx
, "requires integer constant");
2656 oberon_type_t
* arr
;
2658 arr
-> class = OBERON_TYPE_ARRAY
;
2659 arr
-> size
= size
-> item
.integer
;
2664 oberon_qualident_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2667 oberon_object_t
* to
;
2669 to
= oberon_qualident(ctx
, &name
, 0);
2671 //name = oberon_assert_ident(ctx);
2672 //to = oberon_find_object(ctx -> decl, name, 0);
2676 if(to
-> class != OBERON_CLASS_TYPE
)
2678 oberon_error(ctx
, "not a type");
2683 to
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, false, false, false);
2684 to
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2690 static void oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
);
2693 * Правило граматики "type". Указатель type должен указывать на существующий объект!
2697 oberon_make_multiarray(oberon_context_t
* ctx
, oberon_expr_t
* sizes
, oberon_type_t
* base
, oberon_type_t
** type
)
2705 oberon_type_t
* dim
;
2706 dim
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2708 oberon_make_multiarray(ctx
, sizes
-> next
, base
, &dim
);
2710 oberon_make_array_type(ctx
, sizes
, dim
, type
);
2714 oberon_make_open_array(oberon_context_t
* ctx
, oberon_type_t
* base
, oberon_type_t
* type
)
2716 type
-> class = OBERON_TYPE_ARRAY
;
2718 type
-> base
= base
;
2722 oberon_field_list(oberon_context_t
* ctx
, oberon_type_t
* rec
, oberon_scope_t
* modscope
)
2724 if(ctx
-> token
== IDENT
)
2727 oberon_object_t
* list
;
2728 oberon_type_t
* type
;
2729 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2731 oberon_ident_list(ctx
, OBERON_CLASS_FIELD
, true, &num
, &list
);
2732 oberon_assert_token(ctx
, COLON
);
2734 oberon_scope_t
* current
= ctx
-> decl
;
2735 ctx
-> decl
= modscope
;
2736 oberon_type(ctx
, &type
);
2737 ctx
-> decl
= current
;
2739 oberon_object_t
* field
= list
;
2740 for(int i
= 0; i
< num
; i
++)
2742 field
-> type
= type
;
2743 field
= field
-> next
;
2746 rec
-> num_decl
+= num
;
2751 oberon_type_record_body(oberon_context_t
* ctx
, oberon_type_t
* rec
)
2753 oberon_scope_t
* modscope
= ctx
-> mod
-> decl
;
2754 oberon_scope_t
* oldscope
= ctx
-> decl
;
2755 ctx
-> decl
= modscope
;
2757 if(ctx
-> token
== LPAREN
)
2759 oberon_assert_token(ctx
, LPAREN
);
2761 oberon_object_t
* typeobj
;
2762 typeobj
= oberon_qualident(ctx
, NULL
, true);
2764 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2766 oberon_error(ctx
, "base must be type");
2769 oberon_type_t
* base
= typeobj
-> type
;
2770 if(base
-> class == OBERON_TYPE_POINTER
)
2772 base
= base
-> base
;
2775 if(base
-> class != OBERON_TYPE_RECORD
)
2777 oberon_error(ctx
, "base must be record type");
2781 ctx
-> decl
= base
-> scope
;
2783 oberon_assert_token(ctx
, RPAREN
);
2790 oberon_scope_t
* this_scope
;
2791 this_scope
= oberon_open_scope(ctx
);
2792 this_scope
-> local
= true;
2793 this_scope
-> parent
= NULL
;
2794 this_scope
-> parent_type
= rec
;
2796 oberon_field_list(ctx
, rec
, modscope
);
2797 while(ctx
-> token
== SEMICOLON
)
2799 oberon_assert_token(ctx
, SEMICOLON
);
2800 oberon_field_list(ctx
, rec
, modscope
);
2803 rec
-> scope
= this_scope
;
2804 rec
-> decl
= this_scope
-> list
-> next
;
2805 ctx
-> decl
= oldscope
;
2809 oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2811 if(ctx
-> token
== IDENT
)
2813 oberon_qualident_type(ctx
, type
);
2815 else if(ctx
-> token
== ARRAY
)
2817 oberon_assert_token(ctx
, ARRAY
);
2820 oberon_expr_t
* sizes
;
2822 if(ISEXPR(ctx
-> token
))
2824 oberon_expr_list(ctx
, &num_sizes
, &sizes
, 1);
2827 oberon_assert_token(ctx
, OF
);
2829 oberon_type_t
* base
;
2830 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2831 oberon_type(ctx
, &base
);
2835 oberon_make_open_array(ctx
, base
, *type
);
2839 oberon_make_multiarray(ctx
, sizes
, base
, type
);
2842 else if(ctx
-> token
== RECORD
)
2844 oberon_type_t
* rec
;
2846 rec
-> class = OBERON_TYPE_RECORD
;
2847 rec
-> module
= ctx
-> mod
;
2849 oberon_assert_token(ctx
, RECORD
);
2850 oberon_type_record_body(ctx
, rec
);
2851 oberon_assert_token(ctx
, END
);
2855 else if(ctx
-> token
== POINTER
)
2857 oberon_assert_token(ctx
, POINTER
);
2858 oberon_assert_token(ctx
, TO
);
2860 oberon_type_t
* base
;
2861 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2862 oberon_type(ctx
, &base
);
2864 oberon_type_t
* ptr
;
2866 ptr
-> class = OBERON_TYPE_POINTER
;
2869 else if(ctx
-> token
== PROCEDURE
)
2871 oberon_open_scope(ctx
);
2872 oberon_assert_token(ctx
, PROCEDURE
);
2873 oberon_opt_formal_pars(ctx
, type
);
2874 oberon_close_scope(ctx
-> decl
);
2878 oberon_error(ctx
, "invalid type declaration");
2883 oberon_type_decl(oberon_context_t
* ctx
)
2886 oberon_object_t
* newtype
;
2887 oberon_type_t
* type
;
2891 name
= oberon_assert_ident(ctx
);
2892 oberon_def(ctx
, &export
, &read_only
);
2894 newtype
= oberon_find_object(ctx
-> decl
, name
, 0);
2897 newtype
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, export
, read_only
, false);
2898 newtype
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2899 assert(newtype
-> type
);
2903 if(newtype
-> class != OBERON_CLASS_TYPE
)
2905 oberon_error(ctx
, "mult definition");
2908 if(newtype
-> linked
)
2910 oberon_error(ctx
, "mult definition - already linked");
2913 newtype
-> export
= export
;
2914 newtype
-> read_only
= read_only
;
2917 oberon_assert_token(ctx
, EQUAL
);
2919 type
= newtype
-> type
;
2920 oberon_type(ctx
, &type
);
2922 if(type
-> class == OBERON_TYPE_NOTYPE
)
2924 oberon_error(ctx
, "recursive alias declaration");
2927 newtype
-> type
= type
;
2928 newtype
-> linked
= 1;
2931 static void oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2932 static void oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2935 oberon_prevent_recursive_pointer(oberon_context_t
* ctx
, oberon_type_t
* type
)
2937 if(type
-> class != OBERON_TYPE_POINTER
2938 && type
-> class != OBERON_TYPE_ARRAY
)
2943 if(type
-> recursive
)
2945 oberon_error(ctx
, "recursive pointer declaration");
2948 if(type
-> class == OBERON_TYPE_POINTER
2949 && type
-> base
-> class == OBERON_TYPE_POINTER
)
2951 oberon_error(ctx
, "attempt to make pointer to pointer");
2954 type
-> recursive
= 1;
2956 oberon_prevent_recursive_pointer(ctx
, type
-> base
);
2958 type
-> recursive
= 0;
2962 oberon_prevent_recursive_record(oberon_context_t
* ctx
, oberon_type_t
* type
)
2964 if(type
-> class != OBERON_TYPE_RECORD
)
2969 if(type
-> recursive
)
2971 oberon_error(ctx
, "recursive record declaration");
2974 type
-> recursive
= 1;
2978 oberon_prevent_recursive_record(ctx
, type
-> base
);
2981 int num_fields
= type
-> num_decl
;
2982 oberon_object_t
* field
= type
-> decl
;
2983 for(int i
= 0; i
< num_fields
; i
++)
2985 oberon_prevent_recursive_object(ctx
, field
);
2986 field
= field
-> next
;
2989 type
-> recursive
= 0;
2992 oberon_prevent_recursive_procedure(oberon_context_t
* ctx
, oberon_type_t
* type
)
2994 if(type
-> class != OBERON_TYPE_PROCEDURE
)
2999 if(type
-> recursive
)
3001 oberon_error(ctx
, "recursive procedure declaration");
3004 type
-> recursive
= 1;
3006 int num_fields
= type
-> num_decl
;
3007 oberon_object_t
* field
= type
-> decl
;
3008 for(int i
= 0; i
< num_fields
; i
++)
3010 oberon_prevent_recursive_object(ctx
, field
);
3011 field
= field
-> next
;
3014 type
-> recursive
= 0;
3018 oberon_prevent_recursive_array(oberon_context_t
* ctx
, oberon_type_t
* type
)
3020 if(type
-> class != OBERON_TYPE_ARRAY
)
3025 if(type
-> recursive
)
3027 oberon_error(ctx
, "recursive array declaration");
3030 type
-> recursive
= 1;
3032 oberon_prevent_recursive_type(ctx
, type
-> base
);
3034 type
-> recursive
= 0;
3038 oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
3040 if(type
-> class == OBERON_TYPE_POINTER
)
3042 oberon_prevent_recursive_pointer(ctx
, type
);
3044 else if(type
-> class == OBERON_TYPE_RECORD
)
3046 oberon_prevent_recursive_record(ctx
, type
);
3048 else if(type
-> class == OBERON_TYPE_ARRAY
)
3050 oberon_prevent_recursive_array(ctx
, type
);
3052 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
3054 oberon_prevent_recursive_procedure(ctx
, type
);
3059 oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
3063 case OBERON_CLASS_VAR
:
3064 case OBERON_CLASS_TYPE
:
3065 case OBERON_CLASS_PARAM
:
3066 case OBERON_CLASS_VAR_PARAM
:
3067 case OBERON_CLASS_FIELD
:
3068 oberon_prevent_recursive_type(ctx
, x
-> type
);
3070 case OBERON_CLASS_CONST
:
3071 case OBERON_CLASS_PROC
:
3072 case OBERON_CLASS_MODULE
:
3075 oberon_error(ctx
, "oberon_prevent_recursive_object: wat");
3081 oberon_prevent_recursive_decl(oberon_context_t
* ctx
)
3083 oberon_object_t
* x
= ctx
-> decl
-> list
-> next
;
3087 oberon_prevent_recursive_object(ctx
, x
);
3092 static void oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
3093 static void oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
3096 oberon_initialize_record_fields(oberon_context_t
* ctx
, oberon_type_t
* type
)
3098 if(type
-> class != OBERON_TYPE_RECORD
)
3103 int num_fields
= type
-> num_decl
;
3104 oberon_object_t
* field
= type
-> decl
;
3105 for(int i
= 0; i
< num_fields
; i
++)
3107 if(field
-> type
-> class == OBERON_TYPE_POINTER
)
3109 oberon_initialize_type(ctx
, field
-> type
);
3112 oberon_initialize_object(ctx
, field
);
3113 field
= field
-> next
;
3116 oberon_generator_init_record(ctx
, type
);
3120 oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
3122 if(type
-> class == OBERON_TYPE_NOTYPE
)
3124 oberon_error(ctx
, "undeclarated type");
3127 if(type
-> initialized
)
3132 type
-> initialized
= 1;
3134 if(type
-> class == OBERON_TYPE_POINTER
)
3136 oberon_initialize_type(ctx
, type
-> base
);
3137 oberon_generator_init_type(ctx
, type
);
3139 else if(type
-> class == OBERON_TYPE_ARRAY
)
3141 if(type
-> size
!= 0)
3143 if(type
-> base
-> class == OBERON_TYPE_ARRAY
)
3145 if(type
-> base
-> size
== 0)
3147 oberon_error(ctx
, "open array not allowed as array element");
3152 oberon_initialize_type(ctx
, type
-> base
);
3153 oberon_generator_init_type(ctx
, type
);
3155 else if(type
-> class == OBERON_TYPE_RECORD
)
3157 oberon_generator_init_type(ctx
, type
);
3158 oberon_initialize_record_fields(ctx
, type
);
3160 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
3162 int num_fields
= type
-> num_decl
;
3163 oberon_object_t
* field
= type
-> decl
;
3164 for(int i
= 0; i
< num_fields
; i
++)
3166 oberon_initialize_object(ctx
, field
);
3167 field
= field
-> next
;
3170 oberon_generator_init_type(ctx
, type
);
3174 oberon_generator_init_type(ctx
, type
);
3179 oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
3181 if(x
-> initialized
)
3186 x
-> initialized
= 1;
3190 case OBERON_CLASS_TYPE
:
3191 oberon_initialize_type(ctx
, x
-> type
);
3193 case OBERON_CLASS_VAR
:
3194 case OBERON_CLASS_FIELD
:
3195 if(x
-> type
-> class == OBERON_TYPE_ARRAY
)
3197 if(x
-> type
-> size
== 0)
3199 oberon_error(ctx
, "open array not allowed as variable or field");
3202 oberon_initialize_type(ctx
, x
-> type
);
3203 oberon_generator_init_var(ctx
, x
);
3205 case OBERON_CLASS_PARAM
:
3206 case OBERON_CLASS_VAR_PARAM
:
3207 oberon_initialize_type(ctx
, x
-> type
);
3208 oberon_generator_init_var(ctx
, x
);
3210 case OBERON_CLASS_CONST
:
3211 case OBERON_CLASS_PROC
:
3212 case OBERON_CLASS_MODULE
:
3215 oberon_error(ctx
, "oberon_initialize_object: wat");
3221 oberon_initialize_decl(oberon_context_t
* ctx
)
3223 oberon_object_t
* x
= ctx
-> decl
-> list
;
3227 oberon_initialize_object(ctx
, x
-> next
);
3233 oberon_prevent_undeclarated_procedures(oberon_context_t
* ctx
)
3235 oberon_object_t
* x
= ctx
-> decl
-> list
;
3239 if(x
-> next
-> class == OBERON_CLASS_PROC
)
3241 if(x
-> next
-> linked
== 0)
3243 oberon_error(ctx
, "unresolved forward declaration");
3251 oberon_decl_seq(oberon_context_t
* ctx
)
3253 if(ctx
-> token
== CONST
)
3255 oberon_assert_token(ctx
, CONST
);
3256 while(ctx
-> token
== IDENT
)
3258 oberon_const_decl(ctx
);
3259 oberon_assert_token(ctx
, SEMICOLON
);
3263 if(ctx
-> token
== TYPE
)
3265 oberon_assert_token(ctx
, TYPE
);
3266 while(ctx
-> token
== IDENT
)
3268 oberon_type_decl(ctx
);
3269 oberon_assert_token(ctx
, SEMICOLON
);
3273 if(ctx
-> token
== VAR
)
3275 oberon_assert_token(ctx
, VAR
);
3276 while(ctx
-> token
== IDENT
)
3278 oberon_var_decl(ctx
);
3279 oberon_assert_token(ctx
, SEMICOLON
);
3283 oberon_prevent_recursive_decl(ctx
);
3284 oberon_initialize_decl(ctx
);
3286 while(ctx
-> token
== PROCEDURE
)
3288 oberon_proc_decl(ctx
);
3289 oberon_assert_token(ctx
, SEMICOLON
);
3292 oberon_prevent_undeclarated_procedures(ctx
);
3295 static oberon_expr_t
*
3296 oberon_make_temp_var_item(oberon_context_t
* ctx
, oberon_type_t
* type
)
3298 oberon_object_t
* x
;
3299 oberon_expr_t
* expr
;
3301 x
= oberon_create_object(ctx
-> decl
, "TEMP", OBERON_CLASS_VAR
, false, false);
3304 oberon_generator_init_temp_var(ctx
, x
);
3306 expr
= oberon_new_item(MODE_VAR
, type
, false);
3307 expr
-> item
.var
= x
;
3312 oberon_statement_seq(oberon_context_t
* ctx
);
3315 oberon_assign(oberon_context_t
* ctx
, oberon_expr_t
* src
, oberon_expr_t
* dst
)
3317 if(dst
-> read_only
)
3319 oberon_error(ctx
, "read-only destination");
3322 oberon_check_dst(ctx
, dst
);
3323 src
= oberon_autocast_to(ctx
, src
, dst
-> result
);
3324 oberon_generate_assign(ctx
, src
, dst
);
3327 static oberon_expr_t
*
3328 oberon_case_labels(oberon_context_t
* ctx
, oberon_expr_t
* val
)
3332 oberon_expr_t
* cond
;
3333 oberon_expr_t
* cond2
;
3335 e1
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3336 oberon_autocast_to(ctx
, e1
, val
-> result
);
3339 if(ctx
-> token
== DOTDOT
)
3341 oberon_assert_token(ctx
, DOTDOT
);
3342 e2
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3343 oberon_autocast_to(ctx
, e2
, val
-> result
);
3349 cond
= oberon_make_bin_op(ctx
, EQUAL
, val
, e1
);
3353 /* val >= e1 && val <= e2 */
3354 cond
= oberon_make_bin_op(ctx
, GEQ
, val
, e1
);
3355 cond2
= oberon_make_bin_op(ctx
, LEQ
, val
, e2
);
3356 cond
= oberon_make_bin_op(ctx
, AND
, cond
, cond2
);
3363 oberon_case(oberon_context_t
* ctx
, oberon_expr_t
* val
, gen_label_t
* end
)
3365 oberon_expr_t
* cond
;
3366 oberon_expr_t
* cond2
;
3367 gen_label_t
* this_end
;
3369 if(ISEXPR(ctx
-> token
))
3371 this_end
= oberon_generator_reserve_label(ctx
);
3373 cond
= oberon_case_labels(ctx
, val
);
3374 while(ctx
-> token
== COMMA
)
3376 oberon_assert_token(ctx
, COMMA
);
3378 cond2
= oberon_case_labels(ctx
, val
);
3379 cond
= oberon_make_bin_op(ctx
, OR
, cond
, cond2
);
3381 oberon_assert_token(ctx
, COLON
);
3383 oberon_generate_branch(ctx
, cond
, false, this_end
);
3384 oberon_statement_seq(ctx
);
3385 oberon_generate_goto(ctx
, end
);
3387 oberon_generate_label(ctx
, this_end
);
3392 oberon_case_statement(oberon_context_t
* ctx
)
3394 oberon_expr_t
* val
;
3395 oberon_expr_t
* expr
;
3398 end
= oberon_generator_reserve_label(ctx
);
3400 oberon_assert_token(ctx
, CASE
);
3401 expr
= oberon_expr(ctx
);
3402 val
= oberon_make_temp_var_item(ctx
, expr
-> result
);
3403 oberon_assign(ctx
, expr
, val
);
3404 oberon_assert_token(ctx
, OF
);
3405 oberon_case(ctx
, val
, end
);
3406 while(ctx
-> token
== BAR
)
3408 oberon_assert_token(ctx
, BAR
);
3409 oberon_case(ctx
, val
, end
);
3412 if(ctx
-> token
== ELSE
)
3414 oberon_assert_token(ctx
, ELSE
);
3415 oberon_statement_seq(ctx
);
3418 oberon_generate_label(ctx
, end
);
3419 oberon_assert_token(ctx
, END
);
3423 oberon_with_guard_do(oberon_context_t
* ctx
, gen_label_t
* end
)
3425 oberon_expr_t
* val
;
3426 oberon_expr_t
* var
;
3427 oberon_expr_t
* type
;
3428 oberon_expr_t
* cond
;
3429 oberon_expr_t
* cast
;
3430 oberon_type_t
* old_type
;
3431 gen_var_t
* old_var
;
3432 gen_label_t
* this_end
;
3434 this_end
= oberon_generator_reserve_label(ctx
);
3436 var
= oberon_qualident_expr(ctx
);
3437 oberon_assert_token(ctx
, COLON
);
3438 type
= oberon_qualident_expr(ctx
);
3439 cond
= oberon_make_bin_op(ctx
, IS
, var
, type
);
3441 oberon_assert_token(ctx
, DO
);
3442 oberon_generate_branch(ctx
, cond
, false, this_end
);
3444 /* Сохраняем ссылку во временной переменной */
3445 val
= oberon_make_temp_var_item(ctx
, type
-> result
);
3446 cast
= oberno_make_record_cast(ctx
, var
, type
-> result
);
3447 oberon_assign(ctx
, cast
, val
);
3448 /* Подменяем тип у оригинальной переменной */
3449 old_type
= var
-> item
.var
-> type
;
3450 var
-> item
.var
-> type
= type
-> result
;
3451 /* Подменяем ссылку на переменную */
3452 old_var
= var
-> item
.var
-> gen_var
;
3453 var
-> item
.var
-> gen_var
= val
-> item
.var
-> gen_var
;
3455 oberon_statement_seq(ctx
);
3456 oberon_generate_goto(ctx
, end
);
3457 oberon_generate_label(ctx
, this_end
);
3459 /* Возвращаем исходное состояние */
3460 var
-> item
.var
-> gen_var
= old_var
;
3461 var
-> item
.var
-> type
= old_type
;
3465 oberon_with_statement(oberon_context_t
* ctx
)
3468 end
= oberon_generator_reserve_label(ctx
);
3470 oberon_assert_token(ctx
, WITH
);
3471 oberon_with_guard_do(ctx
, end
);
3472 while(ctx
-> token
== BAR
)
3474 oberon_assert_token(ctx
, BAR
);
3475 oberon_with_guard_do(ctx
, end
);
3478 if(ctx
-> token
== ELSE
)
3480 oberon_assert_token(ctx
, ELSE
);
3481 oberon_statement_seq(ctx
);
3484 oberon_generate_label(ctx
, end
);
3485 oberon_assert_token(ctx
, END
);
3489 oberon_statement(oberon_context_t
* ctx
)
3491 oberon_expr_t
* item1
;
3492 oberon_expr_t
* item2
;
3494 if(ctx
-> token
== IDENT
)
3496 item1
= oberon_designator(ctx
);
3497 if(ctx
-> token
== ASSIGN
)
3499 oberon_assert_token(ctx
, ASSIGN
);
3500 item2
= oberon_expr(ctx
);
3501 oberon_assign(ctx
, item2
, item1
);
3505 oberon_opt_proc_parens(ctx
, item1
);
3508 else if(ctx
-> token
== IF
)
3512 oberon_expr_t
* cond
;
3514 els
= oberon_generator_reserve_label(ctx
);
3515 end
= oberon_generator_reserve_label(ctx
);
3517 oberon_assert_token(ctx
, IF
);
3518 cond
= oberon_expr(ctx
);
3519 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3521 oberon_error(ctx
, "condition must be boolean");
3523 oberon_assert_token(ctx
, THEN
);
3524 oberon_generate_branch(ctx
, cond
, false, els
);
3525 oberon_statement_seq(ctx
);
3526 oberon_generate_goto(ctx
, end
);
3527 oberon_generate_label(ctx
, els
);
3529 while(ctx
-> token
== ELSIF
)
3531 els
= oberon_generator_reserve_label(ctx
);
3533 oberon_assert_token(ctx
, ELSIF
);
3534 cond
= oberon_expr(ctx
);
3535 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3537 oberon_error(ctx
, "condition must be boolean");
3539 oberon_assert_token(ctx
, THEN
);
3540 oberon_generate_branch(ctx
, cond
, false, els
);
3541 oberon_statement_seq(ctx
);
3542 oberon_generate_goto(ctx
, end
);
3543 oberon_generate_label(ctx
, els
);
3546 if(ctx
-> token
== ELSE
)
3548 oberon_assert_token(ctx
, ELSE
);
3549 oberon_statement_seq(ctx
);
3552 oberon_generate_label(ctx
, end
);
3553 oberon_assert_token(ctx
, END
);
3555 else if(ctx
-> token
== WHILE
)
3557 gen_label_t
* begin
;
3559 oberon_expr_t
* cond
;
3561 begin
= oberon_generator_reserve_label(ctx
);
3562 end
= oberon_generator_reserve_label(ctx
);
3564 oberon_assert_token(ctx
, WHILE
);
3565 oberon_generate_label(ctx
, begin
);
3566 cond
= oberon_expr(ctx
);
3567 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3569 oberon_error(ctx
, "condition must be boolean");
3571 oberon_generate_branch(ctx
, cond
, false, end
);
3573 oberon_assert_token(ctx
, DO
);
3574 oberon_statement_seq(ctx
);
3575 oberon_generate_goto(ctx
, begin
);
3577 oberon_assert_token(ctx
, END
);
3578 oberon_generate_label(ctx
, end
);
3580 else if(ctx
-> token
== REPEAT
)
3582 gen_label_t
* begin
;
3583 oberon_expr_t
* cond
;
3585 begin
= oberon_generator_reserve_label(ctx
);
3586 oberon_generate_label(ctx
, begin
);
3587 oberon_assert_token(ctx
, REPEAT
);
3589 oberon_statement_seq(ctx
);
3591 oberon_assert_token(ctx
, UNTIL
);
3593 cond
= oberon_expr(ctx
);
3594 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3596 oberon_error(ctx
, "condition must be boolean");
3599 oberon_generate_branch(ctx
, cond
, true, begin
);
3601 else if(ctx
-> token
== FOR
)
3603 oberon_expr_t
* from
;
3604 oberon_expr_t
* index
;
3606 oberon_expr_t
* bound
;
3608 oberon_expr_t
* cond
;
3609 oberon_expr_t
* count
;
3610 gen_label_t
* begin
;
3615 begin
= oberon_generator_reserve_label(ctx
);
3616 end
= oberon_generator_reserve_label(ctx
);
3618 oberon_assert_token(ctx
, FOR
);
3619 iname
= oberon_assert_ident(ctx
);
3620 index
= oberon_ident_item(ctx
, iname
);
3621 oberon_assert_token(ctx
, ASSIGN
);
3622 from
= oberon_expr(ctx
);
3623 oberon_assign(ctx
, from
, index
);
3624 oberon_assert_token(ctx
, TO
);
3625 bound
= oberon_make_temp_var_item(ctx
, index
-> result
);
3626 to
= oberon_expr(ctx
);
3627 oberon_assign(ctx
, to
, bound
);
3628 if(ctx
-> token
== BY
)
3630 oberon_assert_token(ctx
, BY
);
3631 by
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3635 by
= oberon_integer_item(ctx
, 1);
3638 if(by
-> result
-> class != OBERON_TYPE_INTEGER
)
3640 oberon_error(ctx
, "must be integer");
3643 if(by
-> item
.integer
> 0)
3647 else if(by
-> item
.integer
< 0)
3653 oberon_error(ctx
, "zero step not allowed");
3656 oberon_assert_token(ctx
, DO
);
3657 oberon_generate_label(ctx
, begin
);
3658 cond
= oberon_make_bin_op(ctx
, op
, index
, bound
);
3659 oberon_generate_branch(ctx
, cond
, false, end
);
3660 oberon_statement_seq(ctx
);
3661 count
= oberon_make_bin_op(ctx
, PLUS
, index
, by
);
3662 oberon_assign(ctx
, count
, index
);
3663 oberon_generate_goto(ctx
, begin
);
3664 oberon_generate_label(ctx
, end
);
3665 oberon_assert_token(ctx
, END
);
3667 else if(ctx
-> token
== LOOP
)
3669 gen_label_t
* begin
;
3672 begin
= oberon_generator_reserve_label(ctx
);
3673 end
= oberon_generator_reserve_label(ctx
);
3675 oberon_open_scope(ctx
);
3676 oberon_assert_token(ctx
, LOOP
);
3677 oberon_generate_label(ctx
, begin
);
3678 ctx
-> decl
-> exit_label
= end
;
3679 oberon_statement_seq(ctx
);
3680 oberon_generate_goto(ctx
, begin
);
3681 oberon_generate_label(ctx
, end
);
3682 oberon_assert_token(ctx
, END
);
3683 oberon_close_scope(ctx
-> decl
);
3685 else if(ctx
-> token
== EXIT
)
3687 oberon_assert_token(ctx
, EXIT
);
3688 if(ctx
-> decl
-> exit_label
== NULL
)
3690 oberon_error(ctx
, "not in LOOP-END");
3692 oberon_generate_goto(ctx
, ctx
-> decl
-> exit_label
);
3694 else if(ctx
-> token
== CASE
)
3696 oberon_case_statement(ctx
);
3698 else if(ctx
-> token
== WITH
)
3700 oberon_with_statement(ctx
);
3702 else if(ctx
-> token
== RETURN
)
3704 oberon_assert_token(ctx
, RETURN
);
3705 if(ISEXPR(ctx
-> token
))
3707 oberon_expr_t
* expr
;
3708 expr
= oberon_expr(ctx
);
3709 oberon_make_return(ctx
, expr
);
3713 oberon_make_return(ctx
, NULL
);
3719 oberon_statement_seq(oberon_context_t
* ctx
)
3721 oberon_statement(ctx
);
3722 while(ctx
-> token
== SEMICOLON
)
3724 oberon_assert_token(ctx
, SEMICOLON
);
3725 oberon_statement(ctx
);
3730 oberon_import_module(oberon_context_t
* ctx
, char * alias
, char * name
)
3732 oberon_module_t
* m
= ctx
-> module_list
;
3733 while(m
&& strcmp(m
-> name
, name
) != 0)
3741 code
= ctx
-> import_module(name
);
3744 oberon_error(ctx
, "no such module");
3747 m
= oberon_compile_module(ctx
, code
);
3753 oberon_error(ctx
, "cyclic module import");
3756 oberon_object_t
* ident
;
3757 ident
= oberon_define_object(ctx
-> decl
, alias
, OBERON_CLASS_MODULE
, false, false, false);
3758 ident
-> module
= m
;
3762 oberon_import_decl(oberon_context_t
* ctx
)
3767 alias
= name
= oberon_assert_ident(ctx
);
3768 if(ctx
-> token
== ASSIGN
)
3770 oberon_assert_token(ctx
, ASSIGN
);
3771 name
= oberon_assert_ident(ctx
);
3774 oberon_import_module(ctx
, alias
, name
);
3778 oberon_import_list(oberon_context_t
* ctx
)
3780 oberon_assert_token(ctx
, IMPORT
);
3782 oberon_import_decl(ctx
);
3783 while(ctx
-> token
== COMMA
)
3785 oberon_assert_token(ctx
, COMMA
);
3786 oberon_import_decl(ctx
);
3789 oberon_assert_token(ctx
, SEMICOLON
);
3793 oberon_parse_module(oberon_context_t
* ctx
)
3797 oberon_read_token(ctx
);
3799 oberon_assert_token(ctx
, MODULE
);
3800 name1
= oberon_assert_ident(ctx
);
3801 oberon_assert_token(ctx
, SEMICOLON
);
3802 ctx
-> mod
-> name
= name1
;
3804 oberon_generator_init_module(ctx
, ctx
-> mod
);
3806 if(ctx
-> token
== IMPORT
)
3808 oberon_import_list(ctx
);
3811 oberon_decl_seq(ctx
);
3813 oberon_generate_begin_module(ctx
);
3814 if(ctx
-> token
== BEGIN
)
3816 oberon_assert_token(ctx
, BEGIN
);
3817 oberon_statement_seq(ctx
);
3819 oberon_generate_end_module(ctx
);
3821 oberon_assert_token(ctx
, END
);
3822 name2
= oberon_assert_ident(ctx
);
3823 oberon_expect_token(ctx
, DOT
);
3825 if(strcmp(name1
, name2
) != 0)
3827 oberon_error(ctx
, "module name not matched");
3830 oberon_generator_fini_module(ctx
-> mod
);
3833 // =======================================================================
3835 // =======================================================================
3838 register_default_types(oberon_context_t
* ctx
)
3840 ctx
-> notype_type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
3841 oberon_generator_init_type(ctx
, ctx
-> notype_type
);
3843 ctx
-> nil_type
= oberon_new_type_ptr(OBERON_TYPE_NIL
);
3844 oberon_generator_init_type(ctx
, ctx
-> nil_type
);
3846 ctx
-> string_type
= oberon_new_type_string(1);
3847 oberon_generator_init_type(ctx
, ctx
-> string_type
);
3849 ctx
-> bool_type
= oberon_new_type_boolean();
3850 oberon_define_type(ctx
-> world_scope
, "BOOLEAN", ctx
-> bool_type
, 1);
3852 ctx
-> char_type
= oberon_new_type_char(1);
3853 oberon_define_type(ctx
-> world_scope
, "CHAR", ctx
-> char_type
, 1);
3855 ctx
-> byte_type
= oberon_new_type_integer(1);
3856 oberon_define_type(ctx
-> world_scope
, "SHORTINT", ctx
-> byte_type
, 1);
3858 ctx
-> shortint_type
= oberon_new_type_integer(2);
3859 oberon_define_type(ctx
-> world_scope
, "INTEGER", ctx
-> shortint_type
, 1);
3861 ctx
-> int_type
= oberon_new_type_integer(4);
3862 oberon_define_type(ctx
-> world_scope
, "LONGINT", ctx
-> int_type
, 1);
3864 ctx
-> longint_type
= oberon_new_type_integer(8);
3865 oberon_define_type(ctx
-> world_scope
, "HUGEINT", ctx
-> longint_type
, 1);
3867 ctx
-> real_type
= oberon_new_type_real(4);
3868 oberon_define_type(ctx
-> world_scope
, "REAL", ctx
-> real_type
, 1);
3870 ctx
-> longreal_type
= oberon_new_type_real(8);
3871 oberon_define_type(ctx
-> world_scope
, "LONGREAL", ctx
-> longreal_type
, 1);
3873 ctx
-> set_type
= oberon_new_type_set(4);
3874 oberon_define_type(ctx
-> world_scope
, "SET", ctx
-> set_type
, 1);
3878 oberon_new_intrinsic(oberon_context_t
* ctx
, char * name
, GenerateFuncCallback f
, GenerateProcCallback p
)
3880 oberon_object_t
* proc
;
3881 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, true, false, false);
3882 proc
-> type
= oberon_new_type_ptr(OBERON_TYPE_PROCEDURE
);
3883 proc
-> type
-> sysproc
= true;
3884 proc
-> type
-> genfunc
= f
;
3885 proc
-> type
-> genproc
= p
;
3888 static oberon_expr_t
*
3889 oberon_make_min_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3893 oberon_error(ctx
, "too few arguments");
3898 oberon_error(ctx
, "too mach arguments");
3901 oberon_expr_t
* arg
;
3904 if(!arg
-> is_item
|| arg
-> item
.mode
!= MODE_TYPE
)
3906 oberon_error(ctx
, "MIN accept only type");
3909 oberon_expr_t
* expr
;
3910 int bits
= arg
-> result
-> size
* 8;
3911 switch(arg
-> result
-> class)
3913 case OBERON_TYPE_INTEGER
:
3914 expr
= oberon_integer_item(ctx
, -powl(2, bits
- 1));
3916 case OBERON_TYPE_SET
:
3917 expr
= oberon_integer_item(ctx
, 0);
3920 oberon_error(ctx
, "allowed only basic types");
3927 static oberon_expr_t
*
3928 oberon_make_max_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3932 oberon_error(ctx
, "too few arguments");
3937 oberon_error(ctx
, "too mach arguments");
3940 oberon_expr_t
* arg
;
3943 if(!arg
-> is_item
|| arg
-> item
.mode
!= MODE_TYPE
)
3945 oberon_error(ctx
, "MAX accept only type");
3948 oberon_expr_t
* expr
;
3949 int bits
= arg
-> result
-> size
* 8;
3950 switch(arg
-> result
-> class)
3952 case OBERON_TYPE_INTEGER
:
3953 expr
= oberon_integer_item(ctx
, powl(2, bits
- 1) - 1);
3955 case OBERON_TYPE_SET
:
3956 expr
= oberon_integer_item(ctx
, bits
);
3959 oberon_error(ctx
, "allowed only basic types");
3966 static oberon_expr_t
*
3967 oberon_make_size_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
* arg
;
3982 if(!arg
-> is_item
|| arg
-> item
.mode
!= MODE_TYPE
)
3984 oberon_error(ctx
, "SIZE accept only type");
3988 oberon_expr_t
* expr
;
3989 oberon_type_t
* type
= arg
-> result
;
3990 switch(type
-> class)
3992 case OBERON_TYPE_INTEGER
:
3993 case OBERON_TYPE_BOOLEAN
:
3994 case OBERON_TYPE_REAL
:
3995 case OBERON_TYPE_CHAR
:
3996 case OBERON_TYPE_SET
:
3997 size
= type
-> size
;
4000 oberon_error(ctx
, "TODO SIZE");
4004 expr
= oberon_integer_item(ctx
, size
);
4008 static oberon_expr_t
*
4009 oberon_make_abs_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4013 oberon_error(ctx
, "too few arguments");
4018 oberon_error(ctx
, "too mach arguments");
4021 oberon_expr_t
* arg
;
4023 oberon_check_src(ctx
, arg
);
4025 oberon_type_t
* result_type
;
4026 result_type
= arg
-> result
;
4028 if(result_type
-> class != OBERON_TYPE_INTEGER
)
4030 oberon_error(ctx
, "ABS accepts only integers");
4033 oberon_expr_t
* expr
;
4034 expr
= oberon_new_operator(OP_ABS
, result_type
, arg
, NULL
);
4039 oberon_make_new_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4043 oberon_error(ctx
, "too few arguments");
4047 oberon_expr_t
* dst
;
4049 oberon_check_dst(ctx
, dst
);
4051 oberon_type_t
* type
;
4052 type
= dst
-> result
;
4054 if(type
-> class != OBERON_TYPE_POINTER
)
4056 oberon_error(ctx
, "not a pointer");
4059 type
= type
-> base
;
4061 oberon_expr_t
* src
;
4062 src
= oberon_new_item(MODE_NEW
, dst
-> result
, 0);
4063 src
-> item
.num_args
= 0;
4064 src
-> item
.args
= NULL
;
4067 if(type
-> class == OBERON_TYPE_ARRAY
)
4069 if(type
-> size
== 0)
4071 oberon_type_t
* x
= type
;
4072 while(x
-> class == OBERON_TYPE_ARRAY
)
4082 if(num_args
< max_args
)
4084 oberon_error(ctx
, "too few arguments");
4087 if(num_args
> max_args
)
4089 oberon_error(ctx
, "too mach arguments");
4092 int num_sizes
= max_args
- 1;
4093 oberon_expr_t
* size_list
= list_args
-> next
;
4095 oberon_expr_t
* arg
= size_list
;
4096 for(int i
= 0; i
< max_args
- 1; i
++)
4098 oberon_check_src(ctx
, arg
);
4099 if(arg
-> result
-> class != OBERON_TYPE_INTEGER
)
4101 oberon_error(ctx
, "size must be integer");
4106 src
-> item
.num_args
= num_sizes
;
4107 src
-> item
.args
= size_list
;
4109 else if(type
-> class != OBERON_TYPE_RECORD
)
4111 oberon_error(ctx
, "oberon_make_new_call: wat");
4114 if(num_args
> max_args
)
4116 oberon_error(ctx
, "too mach arguments");
4119 oberon_assign(ctx
, src
, dst
);
4123 oberon_new_const(oberon_context_t
* ctx
, char * name
, oberon_expr_t
* expr
)
4125 oberon_object_t
* constant
;
4126 constant
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_CONST
, true, false, false);
4127 oberon_check_const(ctx
, expr
);
4128 constant
-> value
= (oberon_item_t
*) expr
;
4132 oberon_create_context(ModuleImportCallback import_module
)
4134 oberon_context_t
* ctx
= calloc(1, sizeof *ctx
);
4136 oberon_scope_t
* world_scope
;
4137 world_scope
= oberon_open_scope(ctx
);
4138 ctx
-> world_scope
= world_scope
;
4140 ctx
-> import_module
= import_module
;
4142 oberon_generator_init_context(ctx
);
4144 register_default_types(ctx
);
4147 oberon_new_const(ctx
, "TRUE", oberon_make_boolean(ctx
, true));
4148 oberon_new_const(ctx
, "FALSE", oberon_make_boolean(ctx
, false));
4151 oberon_new_intrinsic(ctx
, "ABS", oberon_make_abs_call
, NULL
);
4152 oberon_new_intrinsic(ctx
, "MIN", oberon_make_min_call
, NULL
);
4153 oberon_new_intrinsic(ctx
, "MAX", oberon_make_max_call
, NULL
);
4154 oberon_new_intrinsic(ctx
, "SIZE", oberon_make_size_call
, NULL
);
4157 oberon_new_intrinsic(ctx
, "NEW", NULL
, oberon_make_new_call
);
4163 oberon_destroy_context(oberon_context_t
* ctx
)
4165 oberon_generator_destroy_context(ctx
);
4170 oberon_compile_module(oberon_context_t
* ctx
, const char * newcode
)
4172 const char * code
= ctx
-> code
;
4173 int code_index
= ctx
-> code_index
;
4175 int token
= ctx
-> token
;
4176 char * string
= ctx
-> string
;
4177 int integer
= ctx
-> integer
;
4178 int real
= ctx
-> real
;
4179 bool longmode
= ctx
-> longmode
;
4180 oberon_scope_t
* decl
= ctx
-> decl
;
4181 oberon_module_t
* mod
= ctx
-> mod
;
4183 oberon_scope_t
* module_scope
;
4184 module_scope
= oberon_open_scope(ctx
);
4186 oberon_module_t
* module
;
4187 module
= calloc(1, sizeof *module
);
4188 module
-> decl
= module_scope
;
4189 module
-> next
= ctx
-> module_list
;
4191 ctx
-> mod
= module
;
4192 ctx
-> module_list
= module
;
4194 oberon_init_scaner(ctx
, newcode
);
4195 oberon_parse_module(ctx
);
4197 module
-> ready
= 1;
4200 ctx
-> code_index
= code_index
;
4202 ctx
-> token
= token
;
4203 ctx
-> string
= string
;
4204 ctx
-> integer
= integer
;
4206 ctx
-> longmode
= longmode
;