08543355c92b9e421854e751081df3e6827c8d17
11 #include "../include/oberon.h"
13 #include "oberon-internals.h"
14 #include "oberon-type-compat.h"
15 #include "oberon-common.h"
16 #include "generator.h"
18 // =======================================================================
20 // =======================================================================
23 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
);
25 static oberon_type_t
*
26 oberon_new_type_ptr(int class)
28 oberon_type_t
* x
= malloc(sizeof *x
);
29 memset(x
, 0, sizeof *x
);
34 static oberon_type_t
*
35 oberon_new_type_integer(int size
)
38 x
= oberon_new_type_ptr(OBERON_TYPE_INTEGER
);
43 static oberon_type_t
*
44 oberon_new_type_boolean()
47 x
= oberon_new_type_ptr(OBERON_TYPE_BOOLEAN
);
51 static oberon_type_t
*
52 oberon_new_type_real(int size
)
55 x
= oberon_new_type_ptr(OBERON_TYPE_REAL
);
60 static oberon_type_t
*
61 oberon_new_type_char(int size
)
64 x
= oberon_new_type_ptr(OBERON_TYPE_CHAR
);
69 static oberon_type_t
*
70 oberon_new_type_string(int size
)
73 x
= oberon_new_type_ptr(OBERON_TYPE_STRING
);
78 static oberon_type_t
*
79 oberon_new_type_set(int size
)
82 x
= oberon_new_type_ptr(OBERON_TYPE_SET
);
87 static oberon_expr_t
*
88 oberon_new_operator(int op
, oberon_type_t
* result
, oberon_expr_t
* left
, oberon_expr_t
* right
)
90 oberon_oper_t
* operator;
91 operator = malloc(sizeof *operator);
92 memset(operator, 0, sizeof *operator);
94 operator -> is_item
= 0;
95 operator -> result
= result
;
96 operator -> read_only
= 1;
98 operator -> left
= left
;
99 operator -> right
= right
;
101 return (oberon_expr_t
*) operator;
104 static oberon_expr_t
*
105 oberon_new_item(int mode
, oberon_type_t
* result
, int read_only
)
107 oberon_item_t
* item
;
108 item
= malloc(sizeof *item
);
109 memset(item
, 0, sizeof *item
);
112 item
-> result
= result
;
113 item
-> read_only
= read_only
;
116 return (oberon_expr_t
*)item
;
119 static oberon_type_t
*
120 oberon_get_type_of_int_value(oberon_context_t
* ctx
, int64_t i
)
122 if(i
>= -128 && i
<= 127)
124 return ctx
-> byte_type
;
126 else if(i
>= -32768 && i
<= 32767)
128 return ctx
-> shortint_type
;
130 else if(i
>= -2147483648 && i
<= 2147483647)
132 return ctx
-> int_type
;
136 return ctx
-> longint_type
;
140 static oberon_expr_t
*
141 oberon_make_integer(oberon_context_t
* ctx
, int64_t i
)
143 oberon_expr_t
* expr
;
144 oberon_type_t
* result
;
145 result
= oberon_get_type_of_int_value(ctx
, i
);
146 expr
= oberon_new_item(MODE_INTEGER
, result
, true);
147 expr
-> item
.integer
= i
;
148 expr
-> item
.real
= i
;
152 static oberon_expr_t
*
153 oberon_make_char(oberon_context_t
* ctx
, int64_t i
)
155 oberon_expr_t
* expr
;
156 expr
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
157 expr
-> item
.integer
= i
;
158 expr
-> item
.real
= i
;
162 static oberon_expr_t
*
163 oberon_make_real_typed(oberon_context_t
* ctx
, double r
, oberon_type_t
* result
)
165 oberon_expr_t
* expr
;
166 expr
= oberon_new_item(MODE_REAL
, result
, true);
167 expr
-> item
.integer
= r
;
168 expr
-> item
.real
= r
;
172 static oberon_expr_t
*
173 oberon_make_real(oberon_context_t
* ctx
, double r
, bool longmode
)
175 oberon_type_t
* result
;
176 result
= (longmode
) ? (ctx
-> longreal_type
) : (ctx
-> real_type
);
177 return oberon_make_real_typed(ctx
, r
, result
);
180 static oberon_expr_t
*
181 oberon_make_boolean(oberon_context_t
* ctx
, bool cond
)
183 oberon_expr_t
* expr
;
184 expr
= oberon_new_item(MODE_BOOLEAN
, ctx
-> bool_type
, true);
185 expr
-> item
.integer
= cond
;
186 expr
-> item
.real
= cond
;
190 static oberon_expr_t
*
191 oberon_make_set(oberon_context_t
* ctx
, int64_t i
)
193 oberon_expr_t
* expr
;
194 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
195 expr
-> item
.integer
= i
;
196 expr
-> item
.real
= i
;
200 static oberon_expr_t
*
201 oberon_make_set_range(oberon_context_t
* ctx
, int64_t x
, int64_t y
)
203 oberon_expr_t
* expr
;
204 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
205 expr
-> item
.integer
= (x
<= y
) ? ((2 << y
) - (1 << x
)) : (0);
206 expr
-> item
.real
= expr
-> item
.integer
;
210 // =======================================================================
212 // =======================================================================
214 static oberon_scope_t
*
215 oberon_open_scope(oberon_context_t
* ctx
)
217 oberon_scope_t
* scope
= calloc(1, sizeof *scope
);
218 oberon_object_t
* list
= calloc(1, sizeof *list
);
221 scope
-> list
= list
;
222 scope
-> up
= ctx
-> decl
;
226 scope
-> local
= scope
-> up
-> local
;
227 scope
-> parent
= scope
-> up
-> parent
;
228 scope
-> parent_type
= scope
-> up
-> parent_type
;
229 scope
-> exit_label
= scope
-> up
-> exit_label
;
237 oberon_close_scope(oberon_scope_t
* scope
)
239 oberon_context_t
* ctx
= scope
-> ctx
;
240 ctx
-> decl
= scope
-> up
;
243 static oberon_object_t
*
244 oberon_find_object_in_list(oberon_object_t
* list
, char * name
)
246 oberon_object_t
* x
= list
;
247 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
254 static oberon_object_t
*
255 oberon_find_object(oberon_scope_t
* scope
, char * name
, bool check_it
)
257 oberon_object_t
* result
= NULL
;
259 oberon_scope_t
* s
= scope
;
260 while(result
== NULL
&& s
!= NULL
)
262 result
= oberon_find_object_in_list(s
-> list
, name
);
266 if(check_it
&& result
== NULL
)
268 oberon_error(scope
-> ctx
, "undefined ident %s", name
);
274 static oberon_object_t
*
275 oberon_create_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
)
277 oberon_object_t
* newvar
= malloc(sizeof *newvar
);
278 memset(newvar
, 0, sizeof *newvar
);
279 newvar
-> name
= name
;
280 newvar
-> class = class;
281 newvar
-> export
= export
;
282 newvar
-> read_only
= read_only
;
283 newvar
-> local
= scope
-> local
;
284 newvar
-> parent
= scope
-> parent
;
285 newvar
-> parent_type
= scope
-> parent_type
;
286 newvar
-> module
= scope
-> ctx
-> mod
;
290 static oberon_object_t
*
291 oberon_define_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
, bool check_upscope
)
295 if(oberon_find_object(scope
-> up
, name
, false))
297 oberon_error(scope
-> ctx
, "already defined");
301 oberon_object_t
* x
= scope
-> list
;
302 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
309 oberon_error(scope
-> ctx
, "already defined");
312 oberon_object_t
* newvar
;
313 newvar
= oberon_create_object(scope
, name
, class, export
, read_only
);
319 static oberon_object_t
*
320 oberon_define_type(oberon_scope_t
* scope
, char * name
, oberon_type_t
* type
, int export
)
322 oberon_object_t
* id
;
323 id
= oberon_define_object(scope
, name
, OBERON_CLASS_TYPE
, export
, false, false);
325 oberon_generator_init_type(scope
-> ctx
, type
);
329 // =======================================================================
331 // =======================================================================
334 oberon_get_char(oberon_context_t
* ctx
)
336 if(ctx
-> code
[ctx
-> code_index
])
338 ctx
-> code_index
+= 1;
339 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
344 oberon_init_scaner(oberon_context_t
* ctx
, const char * code
)
347 ctx
-> code_index
= 0;
348 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
352 oberon_read_ident(oberon_context_t
* ctx
)
355 int i
= ctx
-> code_index
;
357 int c
= ctx
-> code
[i
];
365 char * ident
= malloc(len
+ 1);
366 memcpy(ident
, &ctx
->code
[ctx
->code_index
], len
);
369 ctx
-> code_index
= i
;
370 ctx
-> c
= ctx
-> code
[i
];
371 ctx
-> string
= ident
;
372 ctx
-> token
= IDENT
;
374 if(strcmp(ident
, "MODULE") == 0)
376 ctx
-> token
= MODULE
;
378 else if(strcmp(ident
, "END") == 0)
382 else if(strcmp(ident
, "VAR") == 0)
386 else if(strcmp(ident
, "BEGIN") == 0)
388 ctx
-> token
= BEGIN
;
390 else if(strcmp(ident
, "OR") == 0)
394 else if(strcmp(ident
, "DIV") == 0)
398 else if(strcmp(ident
, "MOD") == 0)
402 else if(strcmp(ident
, "PROCEDURE") == 0)
404 ctx
-> token
= PROCEDURE
;
406 else if(strcmp(ident
, "RETURN") == 0)
408 ctx
-> token
= RETURN
;
410 else if(strcmp(ident
, "CONST") == 0)
412 ctx
-> token
= CONST
;
414 else if(strcmp(ident
, "TYPE") == 0)
418 else if(strcmp(ident
, "ARRAY") == 0)
420 ctx
-> token
= ARRAY
;
422 else if(strcmp(ident
, "OF") == 0)
426 else if(strcmp(ident
, "RECORD") == 0)
428 ctx
-> token
= RECORD
;
430 else if(strcmp(ident
, "POINTER") == 0)
432 ctx
-> token
= POINTER
;
434 else if(strcmp(ident
, "TO") == 0)
438 else if(strcmp(ident
, "NIL") == 0)
442 else if(strcmp(ident
, "IMPORT") == 0)
444 ctx
-> token
= IMPORT
;
446 else if(strcmp(ident
, "IN") == 0)
450 else if(strcmp(ident
, "IS") == 0)
454 else if(strcmp(ident
, "IF") == 0)
458 else if(strcmp(ident
, "THEN") == 0)
462 else if(strcmp(ident
, "ELSE") == 0)
466 else if(strcmp(ident
, "ELSIF") == 0)
468 ctx
-> token
= ELSIF
;
470 else if(strcmp(ident
, "WHILE") == 0)
472 ctx
-> token
= WHILE
;
474 else if(strcmp(ident
, "DO") == 0)
478 else if(strcmp(ident
, "REPEAT") == 0)
480 ctx
-> token
= REPEAT
;
482 else if(strcmp(ident
, "UNTIL") == 0)
484 ctx
-> token
= UNTIL
;
486 else if(strcmp(ident
, "FOR") == 0)
490 else if(strcmp(ident
, "BY") == 0)
494 else if(strcmp(ident
, "LOOP") == 0)
498 else if(strcmp(ident
, "EXIT") == 0)
502 else if(strcmp(ident
, "CASE") == 0)
506 else if(strcmp(ident
, "WITH") == 0)
512 #define ISHEXDIGIT(x) \
513 (((x) >= '0' && (x) <= '9') || ((x) >= 'A' && (x) <= 'F'))
516 oberon_read_number(oberon_context_t
* ctx
)
529 * mode = 3 == LONGREAL
533 start_i
= ctx
-> code_index
;
535 while(isdigit(ctx
-> c
))
537 oberon_get_char(ctx
);
540 end_i
= ctx
-> code_index
;
542 if(ISHEXDIGIT(ctx
-> c
))
545 while(ISHEXDIGIT(ctx
-> c
))
547 oberon_get_char(ctx
);
550 end_i
= ctx
-> code_index
;
555 oberon_get_char(ctx
);
557 else if(ctx
-> c
== 'X')
560 oberon_get_char(ctx
);
564 oberon_error(ctx
, "invalid hex number");
567 else if(ctx
-> c
== '.')
569 oberon_get_char(ctx
);
572 /* Чит: избегаем конфликта с DOTDOT */
573 ctx
-> code_index
-= 1;
579 while(isdigit(ctx
-> c
))
581 oberon_get_char(ctx
);
584 if(ctx
-> c
== 'E' || ctx
-> c
== 'D')
586 exp_i
= ctx
-> code_index
;
593 oberon_get_char(ctx
);
595 if(ctx
-> c
== '+' || ctx
-> c
== '-')
597 oberon_get_char(ctx
);
600 while(isdigit(ctx
-> c
))
602 oberon_get_char(ctx
);
606 end_i
= ctx
-> code_index
;
614 oberon_get_char(ctx
);
616 else if(ctx
-> c
== 'X')
619 oberon_get_char(ctx
);
623 int len
= end_i
- start_i
;
624 ident
= malloc(len
+ 1);
625 memcpy(ident
, &ctx
-> code
[start_i
], len
);
628 ctx
-> longmode
= false;
631 int i
= exp_i
- start_i
;
633 ctx
-> longmode
= true;
639 integer
= atol(ident
);
641 ctx
-> token
= INTEGER
;
644 sscanf(ident
, "%lx", &integer
);
646 ctx
-> token
= INTEGER
;
650 sscanf(ident
, "%lf", &real
);
655 sscanf(ident
, "%lx", &integer
);
660 oberon_error(ctx
, "oberon_read_number: wat");
664 ctx
-> string
= ident
;
665 ctx
-> integer
= integer
;
670 oberon_skip_space(oberon_context_t
* ctx
)
672 while(isspace(ctx
-> c
))
674 oberon_get_char(ctx
);
679 oberon_read_comment(oberon_context_t
* ctx
)
686 oberon_get_char(ctx
);
689 oberon_get_char(ctx
);
693 else if(ctx
-> c
== '*')
695 oberon_get_char(ctx
);
698 oberon_get_char(ctx
);
702 else if(ctx
-> c
== 0)
704 oberon_error(ctx
, "unterminated comment");
708 oberon_get_char(ctx
);
713 static void oberon_read_string(oberon_context_t
* ctx
)
716 oberon_get_char(ctx
);
718 int start
= ctx
-> code_index
;
720 while(ctx
-> c
!= 0 && ctx
-> c
!= c
)
722 oberon_get_char(ctx
);
727 oberon_error(ctx
, "unterminated string");
730 int end
= ctx
-> code_index
;
732 oberon_get_char(ctx
);
734 char * string
= calloc(1, end
- start
+ 1);
735 strncpy(string
, &ctx
-> code
[start
], end
- start
);
737 ctx
-> token
= STRING
;
738 ctx
-> string
= string
;
739 ctx
-> integer
= string
[0];
742 static void oberon_read_token(oberon_context_t
* ctx
);
745 oberon_read_symbol(oberon_context_t
* ctx
)
754 ctx
-> token
= SEMICOLON
;
755 oberon_get_char(ctx
);
758 ctx
-> token
= COLON
;
759 oberon_get_char(ctx
);
762 ctx
-> token
= ASSIGN
;
763 oberon_get_char(ctx
);
768 oberon_get_char(ctx
);
771 ctx
-> token
= DOTDOT
;
772 oberon_get_char(ctx
);
776 ctx
-> token
= LPAREN
;
777 oberon_get_char(ctx
);
780 oberon_get_char(ctx
);
781 oberon_read_comment(ctx
);
782 oberon_read_token(ctx
);
786 ctx
-> token
= RPAREN
;
787 oberon_get_char(ctx
);
790 ctx
-> token
= EQUAL
;
791 oberon_get_char(ctx
);
795 oberon_get_char(ctx
);
799 oberon_get_char(ctx
);
803 oberon_get_char(ctx
);
807 ctx
-> token
= GREAT
;
808 oberon_get_char(ctx
);
812 oberon_get_char(ctx
);
817 oberon_get_char(ctx
);
820 ctx
-> token
= MINUS
;
821 oberon_get_char(ctx
);
825 oberon_get_char(ctx
);
828 oberon_get_char(ctx
);
829 oberon_error(ctx
, "unstarted comment");
833 ctx
-> token
= SLASH
;
834 oberon_get_char(ctx
);
838 oberon_get_char(ctx
);
842 oberon_get_char(ctx
);
845 ctx
-> token
= COMMA
;
846 oberon_get_char(ctx
);
849 ctx
-> token
= LBRACK
;
850 oberon_get_char(ctx
);
853 ctx
-> token
= RBRACK
;
854 oberon_get_char(ctx
);
857 ctx
-> token
= UPARROW
;
858 oberon_get_char(ctx
);
861 oberon_read_string(ctx
);
864 oberon_read_string(ctx
);
867 ctx
-> token
= LBRACE
;
868 oberon_get_char(ctx
);
871 ctx
-> token
= RBRACE
;
872 oberon_get_char(ctx
);
876 oberon_get_char(ctx
);
879 oberon_error(ctx
, "invalid char %c", ctx
-> c
);
885 oberon_read_token(oberon_context_t
* ctx
)
887 oberon_skip_space(ctx
);
892 oberon_read_ident(ctx
);
896 oberon_read_number(ctx
);
900 oberon_read_symbol(ctx
);
904 // =======================================================================
906 // =======================================================================
908 static void oberon_expect_token(oberon_context_t
* ctx
, int token
);
909 static oberon_expr_t
* oberon_expr(oberon_context_t
* ctx
);
910 static void oberon_assert_token(oberon_context_t
* ctx
, int token
);
911 static char * oberon_assert_ident(oberon_context_t
* ctx
);
912 static void oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
);
913 static oberon_item_t
* oberon_const_expr(oberon_context_t
* ctx
);
914 static oberon_expr_t
* oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
);
915 static bool oberon_is_const(oberon_expr_t
* expr
);
917 static oberon_expr_t
*
918 oberon_make_unary_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
)
920 oberon_expr_t
* expr
;
921 oberon_type_t
* result
;
923 result
= a
-> result
;
927 if(result
-> class == OBERON_TYPE_SET
)
929 if(oberon_is_const(a
))
931 expr
= oberon_make_set(ctx
, ~(a
-> item
.integer
));
935 expr
= oberon_new_operator(OP_COMPLEMENTATION
, result
, a
, NULL
);
938 else if(result
-> class == OBERON_TYPE_INTEGER
)
940 if(oberon_is_const(a
))
942 expr
= oberon_make_integer(ctx
, -(a
-> item
.integer
));
946 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
949 else if(result
-> class == OBERON_TYPE_REAL
)
951 if(oberon_is_const(a
))
953 expr
= oberon_make_real_typed(ctx
, -(a
-> item
.real
), result
);
957 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
962 oberon_error(ctx
, "incompatible operator type");
965 else if(token
== NOT
)
967 if(result
-> class != OBERON_TYPE_BOOLEAN
)
969 oberon_error(ctx
, "incompatible operator type");
972 if(oberon_is_const(a
))
974 expr
= oberon_make_boolean(ctx
, !(a
-> item
.integer
));
978 expr
= oberon_new_operator(OP_LOGIC_NOT
, result
, a
, NULL
);
983 oberon_error(ctx
, "oberon_make_unary_op: wat");
990 oberon_expr_list(oberon_context_t
* ctx
, int * num_expr
, oberon_expr_t
** first
, int const_expr
)
992 oberon_expr_t
* last
;
997 *first
= last
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1001 *first
= last
= oberon_expr(ctx
);
1003 while(ctx
-> token
== COMMA
)
1005 oberon_assert_token(ctx
, COMMA
);
1006 oberon_expr_t
* current
;
1010 current
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1014 current
= oberon_expr(ctx
);
1017 last
-> next
= current
;
1023 static oberon_expr_t
*
1024 oberon_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1026 oberon_expr_t
* cast
;
1028 if((oberon_is_char_type(pref
) && oberon_is_const_string(expr
) && strlen(expr
-> item
.string
) == 1))
1030 /* Автоматически преобразуем строку единичного размера в символ */
1031 cast
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
1032 cast
-> item
.integer
= expr
-> item
.string
[0];
1036 cast
= oberon_new_operator(OP_CAST
, pref
, expr
, NULL
);
1043 oberon_check_dst(oberon_context_t
* ctx
, oberon_expr_t
* dst
)
1045 if(dst
-> read_only
)
1047 oberon_error(ctx
, "read-only destination");
1050 if(dst
-> is_item
== false)
1052 oberon_error(ctx
, "not variable");
1055 switch(dst
-> item
.mode
)
1066 oberon_error(ctx
, "not variable");
1072 oberon_check_src(oberon_context_t
* ctx
, oberon_expr_t
* src
)
1076 if(src
-> item
.mode
== MODE_TYPE
)
1078 oberon_error(ctx
, "not variable");
1084 oberon_autocast_call(oberon_context_t
* ctx
, oberon_item_t
* desig
)
1086 if(desig
-> mode
!= MODE_CALL
)
1088 oberon_error(ctx
, "expected mode CALL");
1091 oberon_type_t
* fn
= desig
-> parent
-> result
;
1092 int num_args
= desig
-> num_args
;
1093 int num_decl
= fn
-> num_decl
;
1095 if(num_args
< num_decl
)
1097 oberon_error(ctx
, "too few arguments");
1099 else if(num_args
> num_decl
)
1101 oberon_error(ctx
, "too many arguments");
1104 /* Делаем проверку на запись и делаем автокаст */
1105 oberon_expr_t
* casted
[num_args
];
1106 oberon_expr_t
* arg
= desig
-> args
;
1107 oberon_object_t
* param
= fn
-> decl
;
1108 for(int i
= 0; i
< num_args
; i
++)
1110 if(param
-> class == OBERON_CLASS_VAR_PARAM
)
1112 oberon_check_dst(ctx
, arg
);
1113 if(!oberon_is_compatible_arrays(param
, arg
))
1115 oberon_check_compatible_var_param(ctx
, param
-> type
, arg
-> result
);
1117 casted
[i
] = oberon_cast_expr(ctx
, arg
, param
-> type
);
1121 oberon_check_src(ctx
, arg
);
1122 if(!oberon_is_compatible_arrays(param
, arg
))
1124 oberon_check_assignment_compatible(ctx
, arg
, param
-> type
);
1126 casted
[i
] = oberon_cast_expr(ctx
, arg
, param
-> type
);
1130 param
= param
-> next
;
1133 /* Создаём новый список выражений */
1137 for(int i
= 0; i
< num_args
- 1; i
++)
1139 casted
[i
] -> next
= casted
[i
+ 1];
1141 desig
-> args
= arg
;
1145 static oberon_expr_t
*
1146 oberon_make_call_func(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1148 oberon_type_t
* signature
= item
-> result
;
1149 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1151 oberon_error(ctx
, "not a procedure");
1154 oberon_expr_t
* call
;
1156 if(signature
-> sysproc
)
1158 if(signature
-> genfunc
== NULL
)
1160 oberon_error(ctx
, "not a function-procedure");
1163 call
= signature
-> genfunc(ctx
, num_args
, list_args
);
1167 if(signature
-> base
-> class == OBERON_TYPE_NOTYPE
)
1169 oberon_error(ctx
, "attempt to call procedure in expression");
1172 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1173 call
-> item
.parent
= item
;
1174 call
-> item
.num_args
= num_args
;
1175 call
-> item
.args
= list_args
;
1176 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1183 oberon_make_call_proc(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1185 oberon_type_t
* signature
= item
-> result
;
1186 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1188 oberon_error(ctx
, "not a procedure");
1191 oberon_expr_t
* call
;
1193 if(signature
-> sysproc
)
1195 if(signature
-> genproc
== NULL
)
1197 oberon_error(ctx
, "not a procedure");
1200 signature
-> genproc(ctx
, num_args
, list_args
);
1204 if(signature
-> base
-> class != OBERON_TYPE_NOTYPE
)
1206 oberon_error(ctx
, "attempt to call function as non-typed procedure");
1209 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1210 call
-> item
.parent
= item
;
1211 call
-> item
.num_args
= num_args
;
1212 call
-> item
.args
= list_args
;
1213 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1214 oberon_generate_call_proc(ctx
, call
);
1222 || ((x) == INTEGER) \
1225 || ((x) == STRING) \
1227 || ((x) == LPAREN) \
1230 static oberon_expr_t
*
1231 oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1233 if(expr
-> result
-> class != OBERON_TYPE_POINTER
)
1235 oberon_error(ctx
, "not a pointer");
1238 assert(expr
-> is_item
);
1240 oberon_expr_t
* selector
;
1241 selector
= oberon_new_item(MODE_DEREF
, expr
-> result
-> base
, expr
-> read_only
);
1242 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1247 static oberon_expr_t
*
1248 oberon_make_array_selector(oberon_context_t
* ctx
, oberon_expr_t
* desig
, oberon_expr_t
* index
)
1250 if(desig
-> result
-> class == OBERON_TYPE_POINTER
)
1252 desig
= oberno_make_dereferencing(ctx
, desig
);
1255 assert(desig
-> is_item
);
1257 if(desig
-> result
-> class != OBERON_TYPE_ARRAY
)
1259 oberon_error(ctx
, "not array");
1262 oberon_type_t
* base
;
1263 base
= desig
-> result
-> base
;
1265 if(index
-> result
-> class != OBERON_TYPE_INTEGER
)
1267 oberon_error(ctx
, "index must be integer");
1270 // Статическая проверка границ массива
1271 if(desig
-> result
-> size
!= 0)
1273 if(index
-> is_item
)
1275 if(index
-> item
.mode
== MODE_INTEGER
)
1277 int arr_size
= desig
-> result
-> size
;
1278 int index_int
= index
-> item
.integer
;
1279 if(index_int
< 0 || index_int
> arr_size
- 1)
1281 oberon_error(ctx
, "not in range (dimension size 0..%i)", arr_size
- 1);
1287 oberon_expr_t
* selector
;
1288 selector
= oberon_new_item(MODE_INDEX
, base
, desig
-> read_only
);
1289 selector
-> item
.parent
= (oberon_item_t
*) desig
;
1290 selector
-> item
.num_args
= 1;
1291 selector
-> item
.args
= index
;
1296 static oberon_expr_t
*
1297 oberon_make_record_selector(oberon_context_t
* ctx
, oberon_expr_t
* expr
, char * name
)
1299 if(expr
-> result
-> class == OBERON_TYPE_POINTER
)
1301 expr
= oberno_make_dereferencing(ctx
, expr
);
1304 assert(expr
-> is_item
);
1306 if(expr
-> result
-> class != OBERON_TYPE_RECORD
)
1308 oberon_error(ctx
, "not record");
1311 oberon_type_t
* rec
= expr
-> result
;
1313 oberon_object_t
* field
;
1314 field
= oberon_find_object(rec
-> scope
, name
, true);
1316 if(field
-> export
== 0)
1318 if(field
-> module
!= ctx
-> mod
)
1320 oberon_error(ctx
, "field not exported");
1324 int read_only
= expr
-> read_only
;
1325 if(field
-> read_only
)
1327 if(field
-> module
!= ctx
-> mod
)
1333 oberon_expr_t
* selector
;
1334 selector
= oberon_new_item(MODE_FIELD
, field
-> type
, read_only
);
1335 selector
-> item
.var
= field
;
1336 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1341 #define ISSELECTOR(x) \
1344 || ((x) == UPARROW) \
1347 static oberon_object_t
*
1348 oberon_qualident(oberon_context_t
* ctx
, char ** xname
, int check
)
1351 oberon_object_t
* x
;
1353 name
= oberon_assert_ident(ctx
);
1354 x
= oberon_find_object(ctx
-> decl
, name
, check
);
1358 if(x
-> class == OBERON_CLASS_MODULE
)
1360 oberon_assert_token(ctx
, DOT
);
1361 name
= oberon_assert_ident(ctx
);
1362 /* Наличие объектов в левых модулях всегда проверяется */
1363 x
= oberon_find_object(x
-> module
-> decl
, name
, 1);
1365 if(x
-> export
== 0)
1367 oberon_error(ctx
, "not exported");
1380 static oberon_expr_t
*
1381 oberon_ident_item(oberon_context_t
* ctx
, char * name
)
1384 oberon_object_t
* x
;
1385 oberon_expr_t
* expr
;
1387 x
= oberon_find_object(ctx
-> decl
, name
, true);
1390 if(x
-> class == OBERON_CLASS_CONST
|| x
-> class == OBERON_CLASS_PROC
)
1395 expr
= oberon_new_item(MODE_VAR
, x
-> type
, read_only
);
1396 expr
-> item
.var
= x
;
1400 static oberon_expr_t
*
1401 oberon_qualident_expr(oberon_context_t
* ctx
)
1403 oberon_object_t
* var
;
1404 oberon_expr_t
* expr
;
1406 var
= oberon_qualident(ctx
, NULL
, 1);
1409 if(var
-> read_only
)
1411 if(var
-> module
!= ctx
-> mod
)
1417 switch(var
-> class)
1419 case OBERON_CLASS_CONST
:
1421 expr
= (oberon_expr_t
*) var
-> value
;
1423 case OBERON_CLASS_TYPE
:
1424 expr
= oberon_new_item(MODE_TYPE
, var
-> type
, read_only
);
1426 case OBERON_CLASS_VAR
:
1427 case OBERON_CLASS_VAR_PARAM
:
1428 case OBERON_CLASS_PARAM
:
1429 expr
= oberon_new_item(MODE_VAR
, var
-> type
, read_only
);
1431 case OBERON_CLASS_PROC
:
1432 expr
= oberon_new_item(MODE_VAR
, var
-> type
, true);
1435 oberon_error(ctx
, "invalid designator");
1439 expr
-> item
.var
= var
;
1444 static oberon_expr_t
*
1445 oberon_designator(oberon_context_t
* ctx
)
1448 oberon_expr_t
* expr
;
1449 oberon_object_t
* objtype
;
1451 expr
= oberon_qualident_expr(ctx
);
1453 while(expr
-> result
-> class != OBERON_TYPE_PROCEDURE
&& ISSELECTOR(ctx
-> token
))
1455 switch(ctx
-> token
)
1458 oberon_assert_token(ctx
, DOT
);
1459 name
= oberon_assert_ident(ctx
);
1460 expr
= oberon_make_record_selector(ctx
, expr
, name
);
1463 oberon_assert_token(ctx
, LBRACK
);
1464 int num_indexes
= 0;
1465 oberon_expr_t
* indexes
= NULL
;
1466 oberon_expr_list(ctx
, &num_indexes
, &indexes
, 0);
1467 oberon_assert_token(ctx
, RBRACK
);
1469 for(int i
= 0; i
< num_indexes
; i
++)
1471 expr
= oberon_make_array_selector(ctx
, expr
, indexes
);
1472 indexes
= indexes
-> next
;
1476 oberon_assert_token(ctx
, UPARROW
);
1477 expr
= oberno_make_dereferencing(ctx
, expr
);
1480 oberon_assert_token(ctx
, LPAREN
);
1481 objtype
= oberon_qualident(ctx
, NULL
, true);
1482 oberon_assert_token(ctx
, RPAREN
);
1483 oberon_check_extension_of(ctx
, expr
-> result
, objtype
-> type
);
1484 expr
= oberon_cast_expr(ctx
, expr
, objtype
-> type
);
1487 oberon_error(ctx
, "oberon_designator: wat");
1495 static oberon_expr_t
*
1496 oberon_opt_func_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1498 /* Если есть скобки - значит вызов. Если нет, то передаём указатель. */
1499 if(ctx
-> token
== LPAREN
)
1501 oberon_assert_token(ctx
, LPAREN
);
1504 oberon_expr_t
* arguments
= NULL
;
1506 if(ISEXPR(ctx
-> token
))
1508 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1511 assert(expr
-> is_item
== 1);
1512 expr
= oberon_make_call_func(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1514 oberon_assert_token(ctx
, RPAREN
);
1521 oberon_opt_proc_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1523 assert(expr
-> is_item
);
1526 oberon_expr_t
* arguments
= NULL
;
1528 if(ctx
-> token
== LPAREN
)
1530 oberon_assert_token(ctx
, LPAREN
);
1532 if(ISEXPR(ctx
-> token
))
1534 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1537 oberon_assert_token(ctx
, RPAREN
);
1540 /* Вызов происходит даже без скобок */
1541 oberon_make_call_proc(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1544 static oberon_expr_t
*
1545 oberon_element(oberon_context_t
* ctx
)
1550 e1
= oberon_expr(ctx
);
1551 oberon_check_src(ctx
, e1
);
1552 if(e1
-> result
-> class != OBERON_TYPE_INTEGER
)
1554 oberon_error(ctx
, "expected integer");
1558 if(ctx
-> token
== DOTDOT
)
1560 oberon_assert_token(ctx
, DOTDOT
);
1561 e2
= oberon_expr(ctx
);
1562 oberon_check_src(ctx
, e2
);
1563 if(e2
-> result
-> class != OBERON_TYPE_INTEGER
)
1565 oberon_error(ctx
, "expected integer");
1569 oberon_expr_t
* set
;
1570 if(e2
== NULL
&& oberon_is_const(e1
))
1572 set
= oberon_make_set(ctx
, e1
-> item
.integer
);
1574 else if(e2
!= NULL
&& oberon_is_const(e1
) && oberon_is_const(e2
))
1576 set
= oberon_make_set_range(ctx
, e1
-> item
.integer
, e2
-> item
.integer
);
1580 set
= oberon_new_operator(OP_RANGE
, ctx
-> set_type
, e1
, e2
);
1585 static oberon_expr_t
*
1586 oberon_make_set_union(oberon_context_t
* ctx
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1588 if(oberon_is_const(a
) && oberon_is_const(b
))
1590 return oberon_make_set(ctx
, (a
-> item
.integer
| b
-> item
.integer
));
1594 return oberon_new_operator(OP_UNION
, ctx
-> set_type
, a
, b
);
1598 static oberon_expr_t
*
1599 oberon_set(oberon_context_t
* ctx
)
1601 oberon_expr_t
* set
;
1602 oberon_expr_t
* elements
;
1603 set
= oberon_make_set(ctx
, 0);
1605 oberon_assert_token(ctx
, LBRACE
);
1606 if(ISEXPR(ctx
-> token
))
1608 elements
= oberon_element(ctx
);
1609 set
= oberon_make_set_union(ctx
, set
, elements
);
1610 while(ctx
-> token
== COMMA
)
1612 oberon_assert_token(ctx
, COMMA
);
1613 elements
= oberon_element(ctx
);
1614 set
= oberon_make_set_union(ctx
, set
, elements
);
1617 oberon_assert_token(ctx
, RBRACE
);
1622 static oberon_expr_t
*
1623 oberon_factor(oberon_context_t
* ctx
)
1625 oberon_expr_t
* expr
;
1626 oberon_type_t
* result
;
1628 switch(ctx
-> token
)
1631 expr
= oberon_designator(ctx
);
1632 expr
= oberon_opt_func_parens(ctx
, expr
);
1635 expr
= oberon_make_integer(ctx
, ctx
-> integer
);
1636 oberon_assert_token(ctx
, INTEGER
);
1639 result
= ctx
-> char_type
;
1640 expr
= oberon_new_item(MODE_CHAR
, result
, true);
1641 expr
-> item
.integer
= ctx
-> integer
;
1642 oberon_assert_token(ctx
, CHAR
);
1645 result
= ctx
-> string_type
;
1646 expr
= oberon_new_item(MODE_STRING
, result
, true);
1647 expr
-> item
.string
= ctx
-> string
;
1648 oberon_assert_token(ctx
, STRING
);
1651 expr
= oberon_make_real(ctx
, ctx
-> real
, ctx
-> longmode
);
1652 oberon_assert_token(ctx
, REAL
);
1655 expr
= oberon_set(ctx
);
1658 oberon_assert_token(ctx
, LPAREN
);
1659 expr
= oberon_expr(ctx
);
1660 oberon_assert_token(ctx
, RPAREN
);
1663 oberon_assert_token(ctx
, NOT
);
1664 expr
= oberon_factor(ctx
);
1665 expr
= oberon_make_unary_op(ctx
, NOT
, expr
);
1668 oberon_assert_token(ctx
, NIL
);
1669 expr
= oberon_new_item(MODE_NIL
, ctx
-> nil_type
, true);
1672 oberon_error(ctx
, "invalid expression");
1678 static oberon_expr_t
*
1679 oberon_make_bin_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1681 oberon_expr_t
* expr
;
1682 oberon_type_t
* result
;
1684 oberon_check_compatible_bin_expr_types(ctx
, token
, a
-> result
, b
-> result
);
1685 oberon_check_src(ctx
, a
);
1688 oberon_check_src(ctx
, b
);
1693 if(oberon_is_const(a
) && oberon_is_const(b
))
1695 expr
= oberon_make_boolean(ctx
, (1 << a
-> item
.integer
) & b
-> item
.integer
);
1699 expr
= oberon_new_operator(OP_IN
, ctx
-> bool_type
, a
, b
);
1702 else if(token
== IS
)
1704 oberon_check_type_expr(ctx
, b
);
1705 expr
= oberon_new_operator(OP_IS
, ctx
-> bool_type
, a
, b
);
1707 else if((token
>= EQUAL
&& token
<= GEQ
) || token
== OR
|| token
== AND
)
1709 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1711 if(oberon_is_const(a
) && oberon_is_const(b
)
1712 && (oberon_is_real_type(result
) || oberon_is_integer_type(result
)))
1714 if(oberon_is_real_type(result
))
1716 double x
= a
-> item
.real
;
1717 double y
= b
-> item
.real
;
1720 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1721 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1722 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1723 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1724 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1725 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1726 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1727 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1728 default: assert(0); break;
1731 else if(oberon_is_integer_type(result
))
1733 int64_t x
= a
-> item
.integer
;
1734 int64_t y
= b
-> item
.integer
;
1737 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1738 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1739 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1740 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1741 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1742 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1743 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1744 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1745 default: assert(0); break;
1755 a
= oberon_cast_expr(ctx
, a
, result
);
1756 b
= oberon_cast_expr(ctx
, b
, result
);
1757 result
= ctx
-> bool_type
;
1760 case EQUAL
: expr
= oberon_new_operator(OP_EQ
, result
, a
, b
); break;
1761 case NEQ
: expr
= oberon_new_operator(OP_NEQ
, result
, a
, b
); break;
1762 case LESS
: expr
= oberon_new_operator(OP_LSS
, result
, a
, b
); break;
1763 case LEQ
: expr
= oberon_new_operator(OP_LEQ
, result
, a
, b
); break;
1764 case GREAT
: expr
= oberon_new_operator(OP_GRT
, result
, a
, b
); break;
1765 case GEQ
: expr
= oberon_new_operator(OP_GEQ
, result
, a
, b
); break;
1766 case OR
: expr
= oberon_new_operator(OP_LOGIC_OR
, result
, a
, b
); break;
1767 case AND
: expr
= oberon_new_operator(OP_LOGIC_AND
, result
, a
, b
); break;
1768 default: assert(0); break;
1772 else if(token
== SLASH
)
1774 if(oberon_is_set_type(a
-> result
) && oberon_is_set_type(b
-> result
))
1776 if(oberon_is_const(a
) && oberon_is_const(b
))
1778 int64_t x
= a
-> item
.integer
;
1779 int64_t y
= b
-> item
.integer
;
1780 expr
= oberon_make_set(ctx
, x
^ y
);
1784 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1785 a
= oberon_cast_expr(ctx
, a
, result
);
1786 b
= oberon_cast_expr(ctx
, b
, result
);
1787 expr
= oberon_new_operator(OP_SYM_DIFFERENCE
, result
, a
, b
);
1792 result
= oberon_get_longer_real_type(ctx
, a
-> result
, b
-> result
);
1793 if(oberon_is_const(a
) && oberon_is_const(b
))
1795 double x
= a
-> item
.real
;
1796 double y
= b
-> item
.real
;
1797 expr
= oberon_make_real_typed(ctx
, x
/ y
, result
);
1801 a
= oberon_cast_expr(ctx
, a
, result
);
1802 b
= oberon_cast_expr(ctx
, b
, result
);
1803 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
1809 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1811 if(oberon_is_const(a
) && oberon_is_const(b
))
1813 if(oberon_is_set_type(result
))
1815 int64_t x
= a
-> item
.integer
;
1816 int64_t y
= b
-> item
.integer
;
1819 case PLUS
: expr
= oberon_make_set(ctx
, x
| y
); break;
1820 case MINUS
: expr
= oberon_make_set(ctx
, x
& ~y
); break;
1821 case STAR
: expr
= oberon_make_set(ctx
, x
& y
); break;
1822 default: assert(0); break;
1825 if(oberon_is_real_type(result
))
1827 double x
= a
-> item
.real
;
1828 double y
= b
-> item
.real
;
1831 case PLUS
: expr
= oberon_make_real_typed(ctx
, x
+ y
, result
); break;
1832 case MINUS
: expr
= oberon_make_real_typed(ctx
, x
- y
, result
); break;
1833 case STAR
: expr
= oberon_make_real_typed(ctx
, x
* y
, result
); break;
1834 default: assert(0); break;
1837 else if(oberon_is_integer_type(result
))
1839 int64_t x
= a
-> item
.integer
;
1840 int64_t y
= b
-> item
.integer
;
1843 case PLUS
: expr
= oberon_make_integer(ctx
, x
+ y
); break;
1844 case MINUS
: expr
= oberon_make_integer(ctx
, x
- y
); break;
1845 case STAR
: expr
= oberon_make_integer(ctx
, x
* y
); break;
1846 case DIV
: expr
= oberon_make_integer(ctx
, x
/ y
); break;
1847 case MOD
: expr
= oberon_make_integer(ctx
, x
% y
); break;
1848 default: assert(0); break;
1858 a
= oberon_cast_expr(ctx
, a
, result
);
1859 b
= oberon_cast_expr(ctx
, b
, result
);
1862 if(oberon_is_set_type(result
))
1867 expr
= oberon_new_operator(OP_UNION
, result
, a
, b
);
1870 expr
= oberon_new_operator(OP_DIFFERENCE
, result
, a
, b
);
1873 expr
= oberon_new_operator(OP_INTERSECTION
, result
, a
, b
);
1880 else if(oberon_is_number_type(result
))
1885 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
1888 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
1891 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
1908 #define ISMULOP(x) \
1909 ((x) >= STAR && (x) <= AND)
1911 static oberon_expr_t
*
1912 oberon_term_expr(oberon_context_t
* ctx
)
1914 oberon_expr_t
* expr
;
1916 expr
= oberon_factor(ctx
);
1917 while(ISMULOP(ctx
-> token
))
1919 int token
= ctx
-> token
;
1920 oberon_read_token(ctx
);
1922 oberon_expr_t
* inter
= oberon_factor(ctx
);
1923 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
1929 #define ISADDOP(x) \
1930 ((x) >= PLUS && (x) <= OR)
1932 static oberon_expr_t
*
1933 oberon_simple_expr(oberon_context_t
* ctx
)
1935 oberon_expr_t
* expr
;
1938 if(ctx
-> token
== PLUS
)
1941 oberon_assert_token(ctx
, PLUS
);
1943 else if(ctx
-> token
== MINUS
)
1946 oberon_assert_token(ctx
, MINUS
);
1949 expr
= oberon_term_expr(ctx
);
1953 expr
= oberon_make_unary_op(ctx
, MINUS
, expr
);
1956 while(ISADDOP(ctx
-> token
))
1958 int token
= ctx
-> token
;
1959 oberon_read_token(ctx
);
1961 oberon_expr_t
* inter
= oberon_term_expr(ctx
);
1962 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
1968 #define ISRELATION(x) \
1969 ((x) >= EQUAL && (x) <= IS)
1971 static oberon_expr_t
*
1972 oberon_expr(oberon_context_t
* ctx
)
1974 oberon_expr_t
* expr
;
1976 expr
= oberon_simple_expr(ctx
);
1977 while(ISRELATION(ctx
-> token
))
1979 int token
= ctx
-> token
;
1980 oberon_read_token(ctx
);
1982 oberon_expr_t
* inter
= oberon_simple_expr(ctx
);
1983 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
1990 oberon_is_const(oberon_expr_t
* expr
)
1992 if(expr
-> is_item
== false)
1997 switch(expr
-> item
.mode
)
2018 oberon_check_const(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2020 if(!oberon_is_const(expr
))
2022 oberon_error(ctx
, "const expression are required");
2026 static oberon_item_t
*
2027 oberon_const_expr(oberon_context_t
* ctx
)
2029 oberon_expr_t
* expr
;
2030 expr
= oberon_expr(ctx
);
2031 oberon_check_const(ctx
, expr
);
2032 return (oberon_item_t
*) expr
;
2035 // =======================================================================
2037 // =======================================================================
2039 static void oberon_decl_seq(oberon_context_t
* ctx
);
2040 static void oberon_statement_seq(oberon_context_t
* ctx
);
2041 static void oberon_initialize_decl(oberon_context_t
* ctx
);
2044 oberon_expect_token(oberon_context_t
* ctx
, int token
)
2046 if(ctx
-> token
!= token
)
2048 oberon_error(ctx
, "unexpected token %i (%i)", ctx
-> token
, token
);
2053 oberon_assert_token(oberon_context_t
* ctx
, int token
)
2055 oberon_expect_token(ctx
, token
);
2056 oberon_read_token(ctx
);
2060 oberon_assert_ident(oberon_context_t
* ctx
)
2062 oberon_expect_token(ctx
, IDENT
);
2063 char * ident
= ctx
-> string
;
2064 oberon_read_token(ctx
);
2069 oberon_def(oberon_context_t
* ctx
, int * export
, int * read_only
)
2071 switch(ctx
-> token
)
2074 oberon_assert_token(ctx
, STAR
);
2079 oberon_assert_token(ctx
, MINUS
);
2090 static oberon_object_t
*
2091 oberon_ident_def(oberon_context_t
* ctx
, int class, bool check_upscope
)
2096 oberon_object_t
* x
;
2098 name
= oberon_assert_ident(ctx
);
2099 oberon_def(ctx
, &export
, &read_only
);
2101 x
= oberon_define_object(ctx
-> decl
, name
, class, export
, read_only
, check_upscope
);
2106 oberon_ident_list(oberon_context_t
* ctx
, int class, bool check_upscope
, int * num
, oberon_object_t
** list
)
2109 *list
= oberon_ident_def(ctx
, class, check_upscope
);
2110 while(ctx
-> token
== COMMA
)
2112 oberon_assert_token(ctx
, COMMA
);
2113 oberon_ident_def(ctx
, class, check_upscope
);
2119 oberon_var_decl(oberon_context_t
* ctx
)
2122 oberon_object_t
* list
;
2123 oberon_type_t
* type
;
2124 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2126 oberon_ident_list(ctx
, OBERON_CLASS_VAR
, false, &num
, &list
);
2127 oberon_assert_token(ctx
, COLON
);
2128 oberon_type(ctx
, &type
);
2130 oberon_object_t
* var
= list
;
2131 for(int i
= 0; i
< num
; i
++)
2138 static oberon_object_t
*
2139 oberon_fp_section(oberon_context_t
* ctx
, int * num_decl
)
2141 int class = OBERON_CLASS_PARAM
;
2142 if(ctx
-> token
== VAR
)
2144 oberon_read_token(ctx
);
2145 class = OBERON_CLASS_VAR_PARAM
;
2149 oberon_object_t
* list
;
2150 oberon_ident_list(ctx
, class, false, &num
, &list
);
2152 oberon_assert_token(ctx
, COLON
);
2154 oberon_type_t
* type
;
2155 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2156 oberon_type(ctx
, &type
);
2158 oberon_object_t
* param
= list
;
2159 for(int i
= 0; i
< num
; i
++)
2161 param
-> type
= type
;
2162 param
= param
-> next
;
2169 #define ISFPSECTION \
2170 ((ctx -> token == VAR) || (ctx -> token == IDENT))
2173 oberon_formal_pars(oberon_context_t
* ctx
, oberon_type_t
* signature
)
2175 oberon_assert_token(ctx
, LPAREN
);
2179 signature
-> decl
= oberon_fp_section(ctx
, &signature
-> num_decl
);
2180 while(ctx
-> token
== SEMICOLON
)
2182 oberon_assert_token(ctx
, SEMICOLON
);
2183 oberon_fp_section(ctx
, &signature
-> num_decl
);
2187 oberon_assert_token(ctx
, RPAREN
);
2189 if(ctx
-> token
== COLON
)
2191 oberon_assert_token(ctx
, COLON
);
2193 oberon_object_t
* typeobj
;
2194 typeobj
= oberon_qualident(ctx
, NULL
, 1);
2195 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2197 oberon_error(ctx
, "function result is not type");
2199 if(typeobj
-> type
-> class == OBERON_TYPE_RECORD
2200 || typeobj
-> type
-> class == OBERON_TYPE_ARRAY
)
2202 oberon_error(ctx
, "records or arrays could not be result of function");
2204 signature
-> base
= typeobj
-> type
;
2209 oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
)
2211 oberon_type_t
* signature
;
2213 signature
-> class = OBERON_TYPE_PROCEDURE
;
2214 signature
-> num_decl
= 0;
2215 signature
-> base
= ctx
-> notype_type
;
2216 signature
-> decl
= NULL
;
2218 if(ctx
-> token
== LPAREN
)
2220 oberon_formal_pars(ctx
, signature
);
2225 oberon_compare_signatures(oberon_context_t
* ctx
, oberon_type_t
* a
, oberon_type_t
* b
)
2227 if(a
-> num_decl
!= b
-> num_decl
)
2229 oberon_error(ctx
, "number parameters not matched");
2232 int num_param
= a
-> num_decl
;
2233 oberon_object_t
* param_a
= a
-> decl
;
2234 oberon_object_t
* param_b
= b
-> decl
;
2235 for(int i
= 0; i
< num_param
; i
++)
2237 if(strcmp(param_a
-> name
, param_b
-> name
) != 0)
2239 oberon_error(ctx
, "param %i name not matched", i
+ 1);
2242 if(param_a
-> type
!= param_b
-> type
)
2244 oberon_error(ctx
, "param %i type not matched", i
+ 1);
2247 param_a
= param_a
-> next
;
2248 param_b
= param_b
-> next
;
2253 oberon_make_return(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2255 oberon_object_t
* proc
= ctx
-> decl
-> parent
;
2256 oberon_type_t
* result_type
= proc
-> type
-> base
;
2258 if(result_type
-> class == OBERON_TYPE_NOTYPE
)
2262 oberon_error(ctx
, "procedure has no result type");
2269 oberon_error(ctx
, "procedure requires expression on result");
2272 oberon_check_src(ctx
, expr
);
2273 oberon_check_assignment_compatible(ctx
, expr
, result_type
);
2274 expr
= oberon_cast_expr(ctx
, expr
, result_type
);
2277 proc
-> has_return
= 1;
2279 oberon_generate_return(ctx
, expr
);
2283 oberon_proc_decl_body(oberon_context_t
* ctx
, oberon_object_t
* proc
)
2285 oberon_assert_token(ctx
, SEMICOLON
);
2287 ctx
-> decl
= proc
-> scope
;
2289 oberon_decl_seq(ctx
);
2291 oberon_generate_begin_proc(ctx
, proc
);
2293 if(ctx
-> token
== BEGIN
)
2295 oberon_assert_token(ctx
, BEGIN
);
2296 oberon_statement_seq(ctx
);
2299 oberon_assert_token(ctx
, END
);
2300 char * name
= oberon_assert_ident(ctx
);
2301 if(strcmp(name
, proc
-> name
) != 0)
2303 oberon_error(ctx
, "procedure name not matched");
2306 if(proc
-> type
-> base
-> class == OBERON_TYPE_NOTYPE
2307 && proc
-> has_return
== 0)
2309 oberon_make_return(ctx
, NULL
);
2312 if(proc
-> has_return
== 0)
2314 oberon_error(ctx
, "procedure requires return");
2317 oberon_generate_end_proc(ctx
);
2318 oberon_close_scope(ctx
-> decl
);
2322 oberon_proc_decl(oberon_context_t
* ctx
)
2324 oberon_assert_token(ctx
, PROCEDURE
);
2327 if(ctx
-> token
== UPARROW
)
2329 oberon_assert_token(ctx
, UPARROW
);
2336 name
= oberon_assert_ident(ctx
);
2337 oberon_def(ctx
, &export
, &read_only
);
2339 oberon_scope_t
* proc_scope
;
2340 proc_scope
= oberon_open_scope(ctx
);
2341 ctx
-> decl
-> local
= 1;
2343 oberon_type_t
* signature
;
2344 signature
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2345 oberon_opt_formal_pars(ctx
, &signature
);
2347 //oberon_initialize_decl(ctx);
2348 oberon_generator_init_type(ctx
, signature
);
2349 oberon_close_scope(ctx
-> decl
);
2351 oberon_object_t
* proc
;
2352 proc
= oberon_find_object(ctx
-> decl
, name
, 0);
2355 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, export
, read_only
, false);
2356 proc
-> type
= signature
;
2357 proc
-> scope
= proc_scope
;
2358 oberon_generator_init_proc(ctx
, proc
);
2362 if(proc
-> class != OBERON_CLASS_PROC
)
2364 oberon_error(ctx
, "mult definition");
2371 oberon_error(ctx
, "mult procedure definition");
2375 if(proc
-> export
!= export
|| proc
-> read_only
!= read_only
)
2377 oberon_error(ctx
, "export type not matched");
2380 oberon_compare_signatures(ctx
, proc
-> type
, signature
);
2383 proc_scope
-> parent
= proc
;
2384 oberon_object_t
* param
= proc_scope
-> list
-> next
;
2387 param
-> parent
= proc
;
2388 param
= param
-> next
;
2394 oberon_proc_decl_body(ctx
, proc
);
2399 oberon_const_decl(oberon_context_t
* ctx
)
2401 oberon_item_t
* value
;
2402 oberon_object_t
* constant
;
2404 constant
= oberon_ident_def(ctx
, OBERON_CLASS_CONST
, false);
2405 oberon_assert_token(ctx
, EQUAL
);
2406 value
= oberon_const_expr(ctx
);
2407 constant
-> value
= value
;
2411 oberon_make_array_type(oberon_context_t
* ctx
, oberon_expr_t
* size
, oberon_type_t
* base
, oberon_type_t
** type
)
2413 if(size
-> is_item
== 0)
2415 oberon_error(ctx
, "requires constant");
2418 if(size
-> item
.mode
!= MODE_INTEGER
)
2420 oberon_error(ctx
, "requires integer constant");
2423 oberon_type_t
* arr
;
2425 arr
-> class = OBERON_TYPE_ARRAY
;
2426 arr
-> size
= size
-> item
.integer
;
2431 oberon_qualident_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2434 oberon_object_t
* to
;
2436 to
= oberon_qualident(ctx
, &name
, 0);
2438 //name = oberon_assert_ident(ctx);
2439 //to = oberon_find_object(ctx -> decl, name, 0);
2443 if(to
-> class != OBERON_CLASS_TYPE
)
2445 oberon_error(ctx
, "not a type");
2450 to
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, false, false, false);
2451 to
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2457 static void oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
);
2460 * Правило граматики "type". Указатель type должен указывать на существующий объект!
2464 oberon_make_multiarray(oberon_context_t
* ctx
, oberon_expr_t
* sizes
, oberon_type_t
* base
, oberon_type_t
** type
)
2472 oberon_type_t
* dim
;
2473 dim
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2475 oberon_make_multiarray(ctx
, sizes
-> next
, base
, &dim
);
2477 oberon_make_array_type(ctx
, sizes
, dim
, type
);
2481 oberon_make_open_array(oberon_context_t
* ctx
, oberon_type_t
* base
, oberon_type_t
* type
)
2483 type
-> class = OBERON_TYPE_ARRAY
;
2485 type
-> base
= base
;
2489 oberon_field_list(oberon_context_t
* ctx
, oberon_type_t
* rec
, oberon_scope_t
* modscope
)
2491 if(ctx
-> token
== IDENT
)
2494 oberon_object_t
* list
;
2495 oberon_type_t
* type
;
2496 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2498 oberon_ident_list(ctx
, OBERON_CLASS_FIELD
, true, &num
, &list
);
2499 oberon_assert_token(ctx
, COLON
);
2501 oberon_scope_t
* current
= ctx
-> decl
;
2502 ctx
-> decl
= modscope
;
2503 oberon_type(ctx
, &type
);
2504 ctx
-> decl
= current
;
2506 oberon_object_t
* field
= list
;
2507 for(int i
= 0; i
< num
; i
++)
2509 field
-> type
= type
;
2510 field
= field
-> next
;
2513 rec
-> num_decl
+= num
;
2518 oberon_type_record_body(oberon_context_t
* ctx
, oberon_type_t
* rec
)
2520 oberon_scope_t
* modscope
= ctx
-> mod
-> decl
;
2521 oberon_scope_t
* oldscope
= ctx
-> decl
;
2522 ctx
-> decl
= modscope
;
2524 if(ctx
-> token
== LPAREN
)
2526 oberon_assert_token(ctx
, LPAREN
);
2528 oberon_object_t
* typeobj
;
2529 typeobj
= oberon_qualident(ctx
, NULL
, true);
2531 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2533 oberon_error(ctx
, "base must be type");
2536 oberon_type_t
* base
= typeobj
-> type
;
2537 if(base
-> class == OBERON_TYPE_POINTER
)
2539 base
= base
-> base
;
2542 if(base
-> class != OBERON_TYPE_RECORD
)
2544 oberon_error(ctx
, "base must be record type");
2548 ctx
-> decl
= base
-> scope
;
2550 oberon_assert_token(ctx
, RPAREN
);
2557 oberon_scope_t
* this_scope
;
2558 this_scope
= oberon_open_scope(ctx
);
2559 this_scope
-> local
= true;
2560 this_scope
-> parent
= NULL
;
2561 this_scope
-> parent_type
= rec
;
2563 oberon_field_list(ctx
, rec
, modscope
);
2564 while(ctx
-> token
== SEMICOLON
)
2566 oberon_assert_token(ctx
, SEMICOLON
);
2567 oberon_field_list(ctx
, rec
, modscope
);
2570 rec
-> scope
= this_scope
;
2571 rec
-> decl
= this_scope
-> list
-> next
;
2572 ctx
-> decl
= oldscope
;
2576 oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2578 if(ctx
-> token
== IDENT
)
2580 oberon_qualident_type(ctx
, type
);
2582 else if(ctx
-> token
== ARRAY
)
2584 oberon_assert_token(ctx
, ARRAY
);
2587 oberon_expr_t
* sizes
;
2589 if(ISEXPR(ctx
-> token
))
2591 oberon_expr_list(ctx
, &num_sizes
, &sizes
, 1);
2594 oberon_assert_token(ctx
, OF
);
2596 oberon_type_t
* base
;
2597 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2598 oberon_type(ctx
, &base
);
2602 oberon_make_open_array(ctx
, base
, *type
);
2606 oberon_make_multiarray(ctx
, sizes
, base
, type
);
2609 else if(ctx
-> token
== RECORD
)
2611 oberon_type_t
* rec
;
2613 rec
-> class = OBERON_TYPE_RECORD
;
2614 rec
-> module
= ctx
-> mod
;
2616 oberon_assert_token(ctx
, RECORD
);
2617 oberon_type_record_body(ctx
, rec
);
2618 oberon_assert_token(ctx
, END
);
2622 else if(ctx
-> token
== POINTER
)
2624 oberon_assert_token(ctx
, POINTER
);
2625 oberon_assert_token(ctx
, TO
);
2627 oberon_type_t
* base
;
2628 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2629 oberon_type(ctx
, &base
);
2631 oberon_type_t
* ptr
;
2633 ptr
-> class = OBERON_TYPE_POINTER
;
2636 else if(ctx
-> token
== PROCEDURE
)
2638 oberon_open_scope(ctx
);
2639 oberon_assert_token(ctx
, PROCEDURE
);
2640 oberon_opt_formal_pars(ctx
, type
);
2641 oberon_close_scope(ctx
-> decl
);
2645 oberon_error(ctx
, "invalid type declaration");
2650 oberon_type_decl(oberon_context_t
* ctx
)
2653 oberon_object_t
* newtype
;
2654 oberon_type_t
* type
;
2658 name
= oberon_assert_ident(ctx
);
2659 oberon_def(ctx
, &export
, &read_only
);
2661 newtype
= oberon_find_object(ctx
-> decl
, name
, 0);
2664 newtype
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, export
, read_only
, false);
2665 newtype
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2666 assert(newtype
-> type
);
2670 if(newtype
-> class != OBERON_CLASS_TYPE
)
2672 oberon_error(ctx
, "mult definition");
2675 if(newtype
-> linked
)
2677 oberon_error(ctx
, "mult definition - already linked");
2680 newtype
-> export
= export
;
2681 newtype
-> read_only
= read_only
;
2684 oberon_assert_token(ctx
, EQUAL
);
2686 type
= newtype
-> type
;
2687 oberon_type(ctx
, &type
);
2689 if(type
-> class == OBERON_TYPE_NOTYPE
)
2691 oberon_error(ctx
, "recursive alias declaration");
2694 newtype
-> type
= type
;
2695 newtype
-> linked
= 1;
2698 static void oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2699 static void oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2702 oberon_prevent_recursive_pointer(oberon_context_t
* ctx
, oberon_type_t
* type
)
2704 if(type
-> class != OBERON_TYPE_POINTER
2705 && type
-> class != OBERON_TYPE_ARRAY
)
2710 if(type
-> recursive
)
2712 oberon_error(ctx
, "recursive pointer declaration");
2715 if(type
-> class == OBERON_TYPE_POINTER
2716 && type
-> base
-> class == OBERON_TYPE_POINTER
)
2718 oberon_error(ctx
, "attempt to make pointer to pointer");
2721 type
-> recursive
= 1;
2723 oberon_prevent_recursive_pointer(ctx
, type
-> base
);
2725 type
-> recursive
= 0;
2729 oberon_prevent_recursive_record(oberon_context_t
* ctx
, oberon_type_t
* type
)
2731 if(type
-> class != OBERON_TYPE_RECORD
)
2736 if(type
-> recursive
)
2738 oberon_error(ctx
, "recursive record declaration");
2741 type
-> recursive
= 1;
2745 oberon_prevent_recursive_record(ctx
, type
-> base
);
2748 int num_fields
= type
-> num_decl
;
2749 oberon_object_t
* field
= type
-> decl
;
2750 for(int i
= 0; i
< num_fields
; i
++)
2752 oberon_prevent_recursive_object(ctx
, field
);
2753 field
= field
-> next
;
2756 type
-> recursive
= 0;
2759 oberon_prevent_recursive_procedure(oberon_context_t
* ctx
, oberon_type_t
* type
)
2761 if(type
-> class != OBERON_TYPE_PROCEDURE
)
2766 if(type
-> recursive
)
2768 oberon_error(ctx
, "recursive procedure declaration");
2771 type
-> recursive
= 1;
2773 int num_fields
= type
-> num_decl
;
2774 oberon_object_t
* field
= type
-> decl
;
2775 for(int i
= 0; i
< num_fields
; i
++)
2777 oberon_prevent_recursive_object(ctx
, field
);
2778 field
= field
-> next
;
2781 type
-> recursive
= 0;
2785 oberon_prevent_recursive_array(oberon_context_t
* ctx
, oberon_type_t
* type
)
2787 if(type
-> class != OBERON_TYPE_ARRAY
)
2792 if(type
-> recursive
)
2794 oberon_error(ctx
, "recursive array declaration");
2797 type
-> recursive
= 1;
2799 oberon_prevent_recursive_type(ctx
, type
-> base
);
2801 type
-> recursive
= 0;
2805 oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2807 if(type
-> class == OBERON_TYPE_POINTER
)
2809 oberon_prevent_recursive_pointer(ctx
, type
);
2811 else if(type
-> class == OBERON_TYPE_RECORD
)
2813 oberon_prevent_recursive_record(ctx
, type
);
2815 else if(type
-> class == OBERON_TYPE_ARRAY
)
2817 oberon_prevent_recursive_array(ctx
, type
);
2819 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2821 oberon_prevent_recursive_procedure(ctx
, type
);
2826 oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2830 case OBERON_CLASS_VAR
:
2831 case OBERON_CLASS_TYPE
:
2832 case OBERON_CLASS_PARAM
:
2833 case OBERON_CLASS_VAR_PARAM
:
2834 case OBERON_CLASS_FIELD
:
2835 oberon_prevent_recursive_type(ctx
, x
-> type
);
2837 case OBERON_CLASS_CONST
:
2838 case OBERON_CLASS_PROC
:
2839 case OBERON_CLASS_MODULE
:
2842 oberon_error(ctx
, "oberon_prevent_recursive_object: wat");
2848 oberon_prevent_recursive_decl(oberon_context_t
* ctx
)
2850 oberon_object_t
* x
= ctx
-> decl
-> list
-> next
;
2854 oberon_prevent_recursive_object(ctx
, x
);
2859 static void oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2860 static void oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2863 oberon_initialize_record_fields(oberon_context_t
* ctx
, oberon_type_t
* type
)
2865 if(type
-> class != OBERON_TYPE_RECORD
)
2870 int num_fields
= type
-> num_decl
;
2871 oberon_object_t
* field
= type
-> decl
;
2872 for(int i
= 0; i
< num_fields
; i
++)
2874 if(field
-> type
-> class == OBERON_TYPE_POINTER
)
2876 oberon_initialize_type(ctx
, field
-> type
);
2879 oberon_initialize_object(ctx
, field
);
2880 field
= field
-> next
;
2883 oberon_generator_init_record(ctx
, type
);
2887 oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2889 if(type
-> class == OBERON_TYPE_NOTYPE
)
2891 oberon_error(ctx
, "undeclarated type");
2894 if(type
-> initialized
)
2899 type
-> initialized
= 1;
2901 if(type
-> class == OBERON_TYPE_POINTER
)
2903 oberon_initialize_type(ctx
, type
-> base
);
2904 oberon_generator_init_type(ctx
, type
);
2906 else if(type
-> class == OBERON_TYPE_ARRAY
)
2908 if(type
-> size
!= 0)
2910 if(type
-> base
-> class == OBERON_TYPE_ARRAY
)
2912 if(type
-> base
-> size
== 0)
2914 oberon_error(ctx
, "open array not allowed as array element");
2919 oberon_initialize_type(ctx
, type
-> base
);
2920 oberon_generator_init_type(ctx
, type
);
2922 else if(type
-> class == OBERON_TYPE_RECORD
)
2924 oberon_generator_init_type(ctx
, type
);
2925 oberon_initialize_record_fields(ctx
, type
);
2927 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2929 int num_fields
= type
-> num_decl
;
2930 oberon_object_t
* field
= type
-> decl
;
2931 for(int i
= 0; i
< num_fields
; i
++)
2933 oberon_initialize_object(ctx
, field
);
2934 field
= field
-> next
;
2937 oberon_generator_init_type(ctx
, type
);
2941 oberon_generator_init_type(ctx
, type
);
2946 oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2948 if(x
-> initialized
)
2953 x
-> initialized
= 1;
2957 case OBERON_CLASS_TYPE
:
2958 oberon_initialize_type(ctx
, x
-> type
);
2960 case OBERON_CLASS_VAR
:
2961 case OBERON_CLASS_FIELD
:
2962 if(x
-> type
-> class == OBERON_TYPE_ARRAY
)
2964 if(x
-> type
-> size
== 0)
2966 oberon_error(ctx
, "open array not allowed as variable or field");
2969 oberon_initialize_type(ctx
, x
-> type
);
2970 oberon_generator_init_var(ctx
, x
);
2972 case OBERON_CLASS_PARAM
:
2973 case OBERON_CLASS_VAR_PARAM
:
2974 oberon_initialize_type(ctx
, x
-> type
);
2975 oberon_generator_init_var(ctx
, x
);
2977 case OBERON_CLASS_CONST
:
2978 case OBERON_CLASS_PROC
:
2979 case OBERON_CLASS_MODULE
:
2982 oberon_error(ctx
, "oberon_initialize_object: wat");
2988 oberon_initialize_decl(oberon_context_t
* ctx
)
2990 oberon_object_t
* x
= ctx
-> decl
-> list
;
2994 oberon_initialize_object(ctx
, x
-> next
);
3000 oberon_prevent_undeclarated_procedures(oberon_context_t
* ctx
)
3002 oberon_object_t
* x
= ctx
-> decl
-> list
;
3006 if(x
-> next
-> class == OBERON_CLASS_PROC
)
3008 if(x
-> next
-> linked
== 0)
3010 oberon_error(ctx
, "unresolved forward declaration");
3018 oberon_decl_seq(oberon_context_t
* ctx
)
3020 if(ctx
-> token
== CONST
)
3022 oberon_assert_token(ctx
, CONST
);
3023 while(ctx
-> token
== IDENT
)
3025 oberon_const_decl(ctx
);
3026 oberon_assert_token(ctx
, SEMICOLON
);
3030 if(ctx
-> token
== TYPE
)
3032 oberon_assert_token(ctx
, TYPE
);
3033 while(ctx
-> token
== IDENT
)
3035 oberon_type_decl(ctx
);
3036 oberon_assert_token(ctx
, SEMICOLON
);
3040 if(ctx
-> token
== VAR
)
3042 oberon_assert_token(ctx
, VAR
);
3043 while(ctx
-> token
== IDENT
)
3045 oberon_var_decl(ctx
);
3046 oberon_assert_token(ctx
, SEMICOLON
);
3050 oberon_prevent_recursive_decl(ctx
);
3051 oberon_initialize_decl(ctx
);
3053 while(ctx
-> token
== PROCEDURE
)
3055 oberon_proc_decl(ctx
);
3056 oberon_assert_token(ctx
, SEMICOLON
);
3059 oberon_prevent_undeclarated_procedures(ctx
);
3062 static oberon_expr_t
*
3063 oberon_make_temp_var_item(oberon_context_t
* ctx
, oberon_type_t
* type
)
3065 oberon_object_t
* x
;
3066 oberon_expr_t
* expr
;
3068 x
= oberon_create_object(ctx
-> decl
, "TEMP", OBERON_CLASS_VAR
, false, false);
3071 oberon_generator_init_temp_var(ctx
, x
);
3073 expr
= oberon_new_item(MODE_VAR
, type
, false);
3074 expr
-> item
.var
= x
;
3079 oberon_statement_seq(oberon_context_t
* ctx
);
3082 oberon_assign(oberon_context_t
* ctx
, oberon_expr_t
* src
, oberon_expr_t
* dst
)
3084 oberon_check_dst(ctx
, dst
);
3085 oberon_check_assignment_compatible(ctx
, src
, dst
-> result
);
3087 if(oberon_is_array_of_char_type(dst
-> result
)
3088 && oberon_is_string_type(src
-> result
))
3091 oberon_make_copy_call(ctx
, 2, src
);
3095 src
= oberon_cast_expr(ctx
, src
, dst
-> result
);
3096 oberon_generate_assign(ctx
, src
, dst
);
3100 static oberon_expr_t
*
3101 oberon_case_labels(oberon_context_t
* ctx
, oberon_expr_t
* val
)
3105 oberon_expr_t
* cond
;
3106 oberon_expr_t
* cond2
;
3108 e1
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3111 if(ctx
-> token
== DOTDOT
)
3113 oberon_assert_token(ctx
, DOTDOT
);
3114 e2
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3120 cond
= oberon_make_bin_op(ctx
, EQUAL
, val
, e1
);
3124 /* val >= e1 && val <= e2 */
3125 cond
= oberon_make_bin_op(ctx
, GEQ
, val
, e1
);
3126 cond2
= oberon_make_bin_op(ctx
, LEQ
, val
, e2
);
3127 cond
= oberon_make_bin_op(ctx
, AND
, cond
, cond2
);
3134 oberon_case(oberon_context_t
* ctx
, oberon_expr_t
* val
, gen_label_t
* end
)
3136 oberon_expr_t
* cond
;
3137 oberon_expr_t
* cond2
;
3138 gen_label_t
* this_end
;
3140 if(ISEXPR(ctx
-> token
))
3142 this_end
= oberon_generator_reserve_label(ctx
);
3144 cond
= oberon_case_labels(ctx
, val
);
3145 while(ctx
-> token
== COMMA
)
3147 oberon_assert_token(ctx
, COMMA
);
3149 cond2
= oberon_case_labels(ctx
, val
);
3150 cond
= oberon_make_bin_op(ctx
, OR
, cond
, cond2
);
3152 oberon_assert_token(ctx
, COLON
);
3154 oberon_generate_branch(ctx
, cond
, false, this_end
);
3155 oberon_statement_seq(ctx
);
3156 oberon_generate_goto(ctx
, end
);
3158 oberon_generate_label(ctx
, this_end
);
3163 oberon_case_statement(oberon_context_t
* ctx
)
3165 oberon_expr_t
* val
;
3166 oberon_expr_t
* expr
;
3169 end
= oberon_generator_reserve_label(ctx
);
3171 oberon_assert_token(ctx
, CASE
);
3172 expr
= oberon_expr(ctx
);
3173 val
= oberon_make_temp_var_item(ctx
, expr
-> result
);
3174 oberon_assign(ctx
, expr
, val
);
3175 oberon_assert_token(ctx
, OF
);
3176 oberon_case(ctx
, val
, end
);
3177 while(ctx
-> token
== BAR
)
3179 oberon_assert_token(ctx
, BAR
);
3180 oberon_case(ctx
, val
, end
);
3183 if(ctx
-> token
== ELSE
)
3185 oberon_assert_token(ctx
, ELSE
);
3186 oberon_statement_seq(ctx
);
3190 oberon_generate_trap(ctx
, -1);
3193 oberon_generate_label(ctx
, end
);
3194 oberon_assert_token(ctx
, END
);
3198 oberon_with_guard_do(oberon_context_t
* ctx
, gen_label_t
* end
)
3200 oberon_expr_t
* val
;
3201 oberon_expr_t
* var
;
3202 oberon_expr_t
* type
;
3203 oberon_expr_t
* cond
;
3204 oberon_expr_t
* cast
;
3205 oberon_type_t
* old_type
;
3206 gen_var_t
* old_var
;
3207 gen_label_t
* this_end
;
3209 this_end
= oberon_generator_reserve_label(ctx
);
3211 var
= oberon_qualident_expr(ctx
);
3212 oberon_assert_token(ctx
, COLON
);
3213 type
= oberon_qualident_expr(ctx
);
3214 cond
= oberon_make_bin_op(ctx
, IS
, var
, type
);
3216 oberon_assert_token(ctx
, DO
);
3217 oberon_generate_branch(ctx
, cond
, false, this_end
);
3219 /* Сохраняем ссылку во временной переменной */
3220 val
= oberon_make_temp_var_item(ctx
, type
-> result
);
3221 //cast = oberno_make_record_cast(ctx, var, type -> result);
3222 cast
= oberon_cast_expr(ctx
, var
, type
-> result
);
3223 oberon_assign(ctx
, cast
, val
);
3224 /* Подменяем тип у оригинальной переменной */
3225 old_type
= var
-> item
.var
-> type
;
3226 var
-> item
.var
-> type
= type
-> result
;
3227 /* Подменяем ссылку на переменную */
3228 old_var
= var
-> item
.var
-> gen_var
;
3229 var
-> item
.var
-> gen_var
= val
-> item
.var
-> gen_var
;
3231 oberon_statement_seq(ctx
);
3232 oberon_generate_goto(ctx
, end
);
3233 oberon_generate_label(ctx
, this_end
);
3235 /* Возвращаем исходное состояние */
3236 var
-> item
.var
-> gen_var
= old_var
;
3237 var
-> item
.var
-> type
= old_type
;
3241 oberon_with_statement(oberon_context_t
* ctx
)
3244 end
= oberon_generator_reserve_label(ctx
);
3246 oberon_assert_token(ctx
, WITH
);
3247 oberon_with_guard_do(ctx
, end
);
3248 while(ctx
-> token
== BAR
)
3250 oberon_assert_token(ctx
, BAR
);
3251 oberon_with_guard_do(ctx
, end
);
3254 if(ctx
-> token
== ELSE
)
3256 oberon_assert_token(ctx
, ELSE
);
3257 oberon_statement_seq(ctx
);
3261 oberon_generate_trap(ctx
, -2);
3264 oberon_generate_label(ctx
, end
);
3265 oberon_assert_token(ctx
, END
);
3269 oberon_statement(oberon_context_t
* ctx
)
3271 oberon_expr_t
* item1
;
3272 oberon_expr_t
* item2
;
3274 if(ctx
-> token
== IDENT
)
3276 item1
= oberon_designator(ctx
);
3277 if(ctx
-> token
== ASSIGN
)
3279 oberon_assert_token(ctx
, ASSIGN
);
3280 item2
= oberon_expr(ctx
);
3281 oberon_assign(ctx
, item2
, item1
);
3285 oberon_opt_proc_parens(ctx
, item1
);
3288 else if(ctx
-> token
== IF
)
3292 oberon_expr_t
* cond
;
3294 els
= oberon_generator_reserve_label(ctx
);
3295 end
= oberon_generator_reserve_label(ctx
);
3297 oberon_assert_token(ctx
, IF
);
3298 cond
= oberon_expr(ctx
);
3299 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3301 oberon_error(ctx
, "condition must be boolean");
3303 oberon_assert_token(ctx
, THEN
);
3304 oberon_generate_branch(ctx
, cond
, false, els
);
3305 oberon_statement_seq(ctx
);
3306 oberon_generate_goto(ctx
, end
);
3307 oberon_generate_label(ctx
, els
);
3309 while(ctx
-> token
== ELSIF
)
3311 els
= oberon_generator_reserve_label(ctx
);
3313 oberon_assert_token(ctx
, ELSIF
);
3314 cond
= oberon_expr(ctx
);
3315 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3317 oberon_error(ctx
, "condition must be boolean");
3319 oberon_assert_token(ctx
, THEN
);
3320 oberon_generate_branch(ctx
, cond
, false, els
);
3321 oberon_statement_seq(ctx
);
3322 oberon_generate_goto(ctx
, end
);
3323 oberon_generate_label(ctx
, els
);
3326 if(ctx
-> token
== ELSE
)
3328 oberon_assert_token(ctx
, ELSE
);
3329 oberon_statement_seq(ctx
);
3332 oberon_generate_label(ctx
, end
);
3333 oberon_assert_token(ctx
, END
);
3335 else if(ctx
-> token
== WHILE
)
3337 gen_label_t
* begin
;
3339 oberon_expr_t
* cond
;
3341 begin
= oberon_generator_reserve_label(ctx
);
3342 end
= oberon_generator_reserve_label(ctx
);
3344 oberon_assert_token(ctx
, WHILE
);
3345 oberon_generate_label(ctx
, begin
);
3346 cond
= oberon_expr(ctx
);
3347 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3349 oberon_error(ctx
, "condition must be boolean");
3351 oberon_generate_branch(ctx
, cond
, false, end
);
3353 oberon_assert_token(ctx
, DO
);
3354 oberon_statement_seq(ctx
);
3355 oberon_generate_goto(ctx
, begin
);
3357 oberon_assert_token(ctx
, END
);
3358 oberon_generate_label(ctx
, end
);
3360 else if(ctx
-> token
== REPEAT
)
3362 gen_label_t
* begin
;
3363 oberon_expr_t
* cond
;
3365 begin
= oberon_generator_reserve_label(ctx
);
3366 oberon_generate_label(ctx
, begin
);
3367 oberon_assert_token(ctx
, REPEAT
);
3369 oberon_statement_seq(ctx
);
3371 oberon_assert_token(ctx
, UNTIL
);
3373 cond
= oberon_expr(ctx
);
3374 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3376 oberon_error(ctx
, "condition must be boolean");
3379 oberon_generate_branch(ctx
, cond
, true, begin
);
3381 else if(ctx
-> token
== FOR
)
3383 oberon_expr_t
* from
;
3384 oberon_expr_t
* index
;
3386 oberon_expr_t
* bound
;
3388 oberon_expr_t
* cond
;
3389 oberon_expr_t
* count
;
3390 gen_label_t
* begin
;
3395 begin
= oberon_generator_reserve_label(ctx
);
3396 end
= oberon_generator_reserve_label(ctx
);
3398 oberon_assert_token(ctx
, FOR
);
3399 iname
= oberon_assert_ident(ctx
);
3400 index
= oberon_ident_item(ctx
, iname
);
3401 oberon_assert_token(ctx
, ASSIGN
);
3402 from
= oberon_expr(ctx
);
3403 oberon_assert_token(ctx
, TO
);
3404 bound
= oberon_make_temp_var_item(ctx
, index
-> result
);
3405 to
= oberon_expr(ctx
);
3406 oberon_assign(ctx
, to
, bound
); // сначала temp
3407 oberon_assign(ctx
, from
, index
); // потом i
3408 if(ctx
-> token
== BY
)
3410 oberon_assert_token(ctx
, BY
);
3411 by
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3415 by
= oberon_make_integer(ctx
, 1);
3418 if(by
-> result
-> class != OBERON_TYPE_INTEGER
)
3420 oberon_error(ctx
, "must be integer");
3423 if(by
-> item
.integer
> 0)
3427 else if(by
-> item
.integer
< 0)
3433 oberon_error(ctx
, "zero step not allowed");
3436 oberon_assert_token(ctx
, DO
);
3437 oberon_generate_label(ctx
, begin
);
3438 cond
= oberon_make_bin_op(ctx
, op
, index
, bound
);
3439 oberon_generate_branch(ctx
, cond
, false, end
);
3440 oberon_statement_seq(ctx
);
3441 count
= oberon_make_bin_op(ctx
, PLUS
, index
, by
);
3442 oberon_assign(ctx
, count
, index
);
3443 oberon_generate_goto(ctx
, begin
);
3444 oberon_generate_label(ctx
, end
);
3445 oberon_assert_token(ctx
, END
);
3447 else if(ctx
-> token
== LOOP
)
3449 gen_label_t
* begin
;
3452 begin
= oberon_generator_reserve_label(ctx
);
3453 end
= oberon_generator_reserve_label(ctx
);
3455 oberon_open_scope(ctx
);
3456 oberon_assert_token(ctx
, LOOP
);
3457 oberon_generate_label(ctx
, begin
);
3458 ctx
-> decl
-> exit_label
= end
;
3459 oberon_statement_seq(ctx
);
3460 oberon_generate_goto(ctx
, begin
);
3461 oberon_generate_label(ctx
, end
);
3462 oberon_assert_token(ctx
, END
);
3463 oberon_close_scope(ctx
-> decl
);
3465 else if(ctx
-> token
== EXIT
)
3467 oberon_assert_token(ctx
, EXIT
);
3468 if(ctx
-> decl
-> exit_label
== NULL
)
3470 oberon_error(ctx
, "not in LOOP-END");
3472 oberon_generate_goto(ctx
, ctx
-> decl
-> exit_label
);
3474 else if(ctx
-> token
== CASE
)
3476 oberon_case_statement(ctx
);
3478 else if(ctx
-> token
== WITH
)
3480 oberon_with_statement(ctx
);
3482 else if(ctx
-> token
== RETURN
)
3484 oberon_assert_token(ctx
, RETURN
);
3485 if(ISEXPR(ctx
-> token
))
3487 oberon_expr_t
* expr
;
3488 expr
= oberon_expr(ctx
);
3489 oberon_make_return(ctx
, expr
);
3493 oberon_make_return(ctx
, NULL
);
3499 oberon_statement_seq(oberon_context_t
* ctx
)
3501 oberon_statement(ctx
);
3502 while(ctx
-> token
== SEMICOLON
)
3504 oberon_assert_token(ctx
, SEMICOLON
);
3505 oberon_statement(ctx
);
3510 oberon_import_module(oberon_context_t
* ctx
, char * alias
, char * name
)
3512 oberon_module_t
* m
= ctx
-> module_list
;
3513 while(m
&& strcmp(m
-> name
, name
) != 0)
3521 code
= ctx
-> import_module(name
);
3524 oberon_error(ctx
, "no such module");
3527 m
= oberon_compile_module(ctx
, code
);
3533 oberon_error(ctx
, "cyclic module import");
3536 oberon_object_t
* ident
;
3537 ident
= oberon_define_object(ctx
-> decl
, alias
, OBERON_CLASS_MODULE
, false, false, false);
3538 ident
-> module
= m
;
3542 oberon_import_decl(oberon_context_t
* ctx
)
3547 alias
= name
= oberon_assert_ident(ctx
);
3548 if(ctx
-> token
== ASSIGN
)
3550 oberon_assert_token(ctx
, ASSIGN
);
3551 name
= oberon_assert_ident(ctx
);
3554 oberon_import_module(ctx
, alias
, name
);
3558 oberon_import_list(oberon_context_t
* ctx
)
3560 oberon_assert_token(ctx
, IMPORT
);
3562 oberon_import_decl(ctx
);
3563 while(ctx
-> token
== COMMA
)
3565 oberon_assert_token(ctx
, COMMA
);
3566 oberon_import_decl(ctx
);
3569 oberon_assert_token(ctx
, SEMICOLON
);
3573 oberon_parse_module(oberon_context_t
* ctx
)
3577 oberon_read_token(ctx
);
3579 oberon_assert_token(ctx
, MODULE
);
3580 name1
= oberon_assert_ident(ctx
);
3581 oberon_assert_token(ctx
, SEMICOLON
);
3582 ctx
-> mod
-> name
= name1
;
3584 oberon_generator_init_module(ctx
, ctx
-> mod
);
3586 if(ctx
-> token
== IMPORT
)
3588 oberon_import_list(ctx
);
3591 oberon_decl_seq(ctx
);
3593 oberon_generate_begin_module(ctx
);
3594 if(ctx
-> token
== BEGIN
)
3596 oberon_assert_token(ctx
, BEGIN
);
3597 oberon_statement_seq(ctx
);
3599 oberon_generate_end_module(ctx
);
3601 oberon_assert_token(ctx
, END
);
3602 name2
= oberon_assert_ident(ctx
);
3603 oberon_expect_token(ctx
, DOT
);
3605 if(strcmp(name1
, name2
) != 0)
3607 oberon_error(ctx
, "module name not matched");
3610 oberon_generator_fini_module(ctx
-> mod
);
3613 // =======================================================================
3615 // =======================================================================
3618 register_default_types(oberon_context_t
* ctx
)
3620 ctx
-> notype_type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
3621 oberon_generator_init_type(ctx
, ctx
-> notype_type
);
3623 ctx
-> nil_type
= oberon_new_type_ptr(OBERON_TYPE_NIL
);
3624 oberon_generator_init_type(ctx
, ctx
-> nil_type
);
3626 ctx
-> string_type
= oberon_new_type_string(1);
3627 oberon_generator_init_type(ctx
, ctx
-> string_type
);
3629 ctx
-> bool_type
= oberon_new_type_boolean();
3630 oberon_define_type(ctx
-> world_scope
, "BOOLEAN", ctx
-> bool_type
, 1);
3632 ctx
-> char_type
= oberon_new_type_char(1);
3633 oberon_define_type(ctx
-> world_scope
, "CHAR", ctx
-> char_type
, 1);
3635 ctx
-> byte_type
= oberon_new_type_integer(1);
3636 oberon_define_type(ctx
-> world_scope
, "SHORTINT", ctx
-> byte_type
, 1);
3638 ctx
-> shortint_type
= oberon_new_type_integer(2);
3639 oberon_define_type(ctx
-> world_scope
, "INTEGER", ctx
-> shortint_type
, 1);
3641 ctx
-> int_type
= oberon_new_type_integer(4);
3642 oberon_define_type(ctx
-> world_scope
, "LONGINT", ctx
-> int_type
, 1);
3644 ctx
-> longint_type
= oberon_new_type_integer(8);
3645 oberon_define_type(ctx
-> world_scope
, "HUGEINT", ctx
-> longint_type
, 1);
3647 ctx
-> real_type
= oberon_new_type_real(4);
3648 oberon_define_type(ctx
-> world_scope
, "REAL", ctx
-> real_type
, 1);
3650 ctx
-> longreal_type
= oberon_new_type_real(8);
3651 oberon_define_type(ctx
-> world_scope
, "LONGREAL", ctx
-> longreal_type
, 1);
3653 ctx
-> set_type
= oberon_new_type_set(4);
3654 oberon_define_type(ctx
-> world_scope
, "SET", ctx
-> set_type
, 1);
3658 oberon_new_intrinsic(oberon_context_t
* ctx
, char * name
, GenerateFuncCallback f
, GenerateProcCallback p
)
3660 oberon_object_t
* proc
;
3661 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, true, false, false);
3662 proc
-> type
= oberon_new_type_ptr(OBERON_TYPE_PROCEDURE
);
3663 proc
-> type
-> sysproc
= true;
3664 proc
-> type
-> genfunc
= f
;
3665 proc
-> type
-> genproc
= p
;
3668 static oberon_expr_t
*
3669 oberon_make_min_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3673 oberon_error(ctx
, "too few arguments");
3678 oberon_error(ctx
, "too mach arguments");
3681 oberon_expr_t
* arg
;
3684 if(!oberon_is_type_expr(arg
))
3686 oberon_error(ctx
, "MIN accept only type");
3689 oberon_expr_t
* expr
;
3690 int bits
= arg
-> result
-> size
* 8;
3691 switch(arg
-> result
-> class)
3693 case OBERON_TYPE_INTEGER
:
3694 expr
= oberon_make_integer(ctx
, -powl(2, bits
- 1));
3696 case OBERON_TYPE_BOOLEAN
:
3697 expr
= oberon_make_boolean(ctx
, false);
3699 case OBERON_TYPE_CHAR
:
3700 expr
= oberon_make_char(ctx
, 0);
3702 case OBERON_TYPE_REAL
:
3703 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (-FLT_MAX
) : (-DBL_MAX
), arg
-> result
);
3705 case OBERON_TYPE_SET
:
3706 expr
= oberon_make_integer(ctx
, 0);
3709 oberon_error(ctx
, "allowed only basic types");
3716 static oberon_expr_t
*
3717 oberon_make_max_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3721 oberon_error(ctx
, "too few arguments");
3726 oberon_error(ctx
, "too mach arguments");
3729 oberon_expr_t
* arg
;
3732 if(!oberon_is_type_expr(arg
))
3734 oberon_error(ctx
, "MAX accept only type");
3737 oberon_expr_t
* expr
;
3738 int bits
= arg
-> result
-> size
* 8;
3739 switch(arg
-> result
-> class)
3741 case OBERON_TYPE_INTEGER
:
3742 expr
= oberon_make_integer(ctx
, powl(2, bits
- 1) - 1);
3744 case OBERON_TYPE_BOOLEAN
:
3745 expr
= oberon_make_boolean(ctx
, true);
3747 case OBERON_TYPE_CHAR
:
3748 expr
= oberon_make_char(ctx
, powl(2, bits
) - 1);
3750 case OBERON_TYPE_REAL
:
3751 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (FLT_MAX
) : (DBL_MAX
), arg
-> result
);
3753 case OBERON_TYPE_SET
:
3754 expr
= oberon_make_integer(ctx
, bits
);
3757 oberon_error(ctx
, "allowed only basic types");
3764 static oberon_expr_t
*
3765 oberon_make_size_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3769 oberon_error(ctx
, "too few arguments");
3774 oberon_error(ctx
, "too mach arguments");
3777 oberon_expr_t
* arg
;
3779 if(!oberon_is_type_expr(arg
))
3781 oberon_error(ctx
, "SIZE accept only type");
3785 oberon_expr_t
* expr
;
3786 oberon_type_t
* type
= arg
-> result
;
3787 switch(type
-> class)
3789 case OBERON_TYPE_INTEGER
:
3790 case OBERON_TYPE_BOOLEAN
:
3791 case OBERON_TYPE_REAL
:
3792 case OBERON_TYPE_CHAR
:
3793 case OBERON_TYPE_SET
:
3794 size
= type
-> size
;
3797 oberon_error(ctx
, "TODO SIZE");
3801 expr
= oberon_make_integer(ctx
, size
);
3805 static oberon_expr_t
*
3806 oberon_make_abs_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3810 oberon_error(ctx
, "too few arguments");
3815 oberon_error(ctx
, "too mach arguments");
3818 oberon_expr_t
* arg
;
3820 oberon_check_src(ctx
, arg
);
3822 if(oberon_is_number_type(arg
-> result
))
3824 oberon_error(ctx
, "ABS accepts only numbers");
3827 oberon_expr_t
* expr
;
3828 if(oberon_is_const(arg
))
3830 if(oberon_is_real_type(arg
-> result
))
3832 double x
= arg
-> item
.real
;
3833 expr
= oberon_make_real(ctx
, fabsl(x
), arg
-> result
);
3837 int64_t x
= arg
-> item
.integer
;
3838 expr
= oberon_make_integer(ctx
, llabs(x
));
3843 expr
= oberon_new_operator(OP_ABS
, arg
-> result
, arg
, NULL
);
3849 oberon_make_new_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3853 oberon_error(ctx
, "too few arguments");
3856 oberon_expr_t
* dst
;
3858 oberon_check_dst(ctx
, dst
);
3860 oberon_type_t
* type
;
3861 type
= dst
-> result
;
3863 if(type
-> class != OBERON_TYPE_POINTER
)
3865 oberon_error(ctx
, "not a pointer");
3868 type
= type
-> base
;
3870 oberon_expr_t
* src
;
3871 src
= oberon_new_item(MODE_NEW
, dst
-> result
, 0);
3872 src
-> item
.num_args
= 0;
3873 src
-> item
.args
= NULL
;
3876 if(type
-> class == OBERON_TYPE_ARRAY
)
3878 if(type
-> size
== 0)
3880 oberon_type_t
* x
= type
;
3881 while(x
-> class == OBERON_TYPE_ARRAY
)
3891 if(num_args
< max_args
)
3893 oberon_error(ctx
, "too few arguments");
3896 if(num_args
> max_args
)
3898 oberon_error(ctx
, "too mach arguments");
3901 int num_sizes
= max_args
- 1;
3902 oberon_expr_t
* size_list
= list_args
-> next
;
3904 oberon_expr_t
* arg
= size_list
;
3905 for(int i
= 0; i
< max_args
- 1; i
++)
3907 oberon_check_src(ctx
, arg
);
3908 if(arg
-> result
-> class != OBERON_TYPE_INTEGER
)
3910 oberon_error(ctx
, "size must be integer");
3915 src
-> item
.num_args
= num_sizes
;
3916 src
-> item
.args
= size_list
;
3918 else if(type
-> class != OBERON_TYPE_RECORD
)
3920 oberon_error(ctx
, "oberon_make_new_call: wat");
3923 if(num_args
> max_args
)
3925 oberon_error(ctx
, "too mach arguments");
3928 oberon_assign(ctx
, src
, dst
);
3932 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3936 oberon_error(ctx
, "too few arguments");
3941 oberon_error(ctx
, "too mach arguments");
3944 oberon_expr_t
* src
;
3946 oberon_check_src(ctx
, src
);
3948 oberon_expr_t
* dst
;
3949 dst
= list_args
-> next
;
3950 oberon_check_dst(ctx
, dst
);
3952 if(!oberon_is_string_type(src
-> result
) && !oberon_is_array_of_char_type(src
-> result
))
3954 oberon_error(ctx
, "source must be string or array of char");
3957 if(!oberon_is_array_of_char_type(dst
-> result
))
3959 oberon_error(ctx
, "dst must be array of char");
3962 oberon_generate_copy(ctx
, src
, dst
);
3966 oberon_make_assert_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3970 oberon_error(ctx
, "too few arguments");
3975 oberon_error(ctx
, "too mach arguments");
3978 oberon_expr_t
* cond
;
3980 oberon_check_src(ctx
, cond
);
3982 if(!oberon_is_boolean_type(cond
-> result
))
3984 oberon_error(ctx
, "expected boolean");
3989 oberon_generate_assert(ctx
, cond
);
3993 oberon_expr_t
* num
;
3994 num
= list_args
-> next
;
3995 oberon_check_src(ctx
, num
);
3997 if(!oberon_is_integer_type(num
-> result
))
3999 oberon_error(ctx
, "expected integer");
4002 oberon_check_const(ctx
, num
);
4004 oberon_generate_assert_n(ctx
, cond
, num
-> item
.integer
);
4009 oberon_make_halt_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
* num
;
4023 oberon_check_src(ctx
, num
);
4025 if(num
-> result
-> class != OBERON_TYPE_INTEGER
)
4027 oberon_error(ctx
, "expected integer");
4030 oberon_check_const(ctx
, num
);
4032 oberon_generate_halt(ctx
, num
-> item
.integer
);
4035 static oberon_expr_t
*
4036 oberon_make_ash_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4040 oberon_error(ctx
, "too few arguments");
4045 oberon_error(ctx
, "too mach arguments");
4048 oberon_expr_t
* arg1
;
4050 oberon_check_src(ctx
, arg1
);
4051 if(arg1
-> result
-> class != OBERON_TYPE_INTEGER
)
4053 oberon_error(ctx
, "expected integer");
4056 oberon_expr_t
* arg2
;
4057 arg2
= list_args
-> next
;
4058 oberon_check_src(ctx
, arg2
);
4059 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4061 oberon_error(ctx
, "expected integer");
4064 oberon_expr_t
* expr
;
4065 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4067 int64_t x
= arg1
-> item
.integer
;
4068 int64_t y
= arg2
-> item
.integer
;
4069 expr
= oberon_make_integer(ctx
, x
* powl(2, y
));
4073 expr
= oberon_new_operator(OP_ASH
, arg1
-> result
, arg1
, arg2
);
4079 static oberon_expr_t
*
4080 oberon_make_cap_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4084 oberon_error(ctx
, "too few arguments");
4089 oberon_error(ctx
, "too mach arguments");
4092 oberon_expr_t
* arg
;
4094 oberon_check_src(ctx
, arg
);
4096 if(!oberon_is_char_type(arg
-> result
))
4098 oberon_error(ctx
, "expected char");
4101 oberon_expr_t
* expr
;
4102 if(oberon_is_const(arg
))
4104 expr
= oberon_make_char(ctx
, toupper(arg
-> item
.integer
));
4108 expr
= oberon_new_operator(OP_CAP
, arg
-> result
, arg
, NULL
);
4114 static oberon_expr_t
*
4115 oberon_make_odd_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4119 oberon_error(ctx
, "too few arguments");
4124 oberon_error(ctx
, "too mach arguments");
4127 oberon_expr_t
* arg
;
4129 oberon_check_src(ctx
, arg
);
4131 if(!oberon_is_integer_type(arg
-> result
))
4133 oberon_error(ctx
, "expected integer");
4136 oberon_expr_t
* expr
;
4137 expr
= oberon_make_bin_op(ctx
, MOD
, arg
, oberon_make_integer(ctx
, 2));
4138 expr
= oberon_make_bin_op(ctx
, EQUAL
, expr
, oberon_make_integer(ctx
, 1));
4143 oberon_new_const(oberon_context_t
* ctx
, char * name
, oberon_expr_t
* expr
)
4145 oberon_object_t
* constant
;
4146 constant
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_CONST
, true, false, false);
4147 oberon_check_const(ctx
, expr
);
4148 constant
-> value
= (oberon_item_t
*) expr
;
4152 oberon_create_context(ModuleImportCallback import_module
)
4154 oberon_context_t
* ctx
= calloc(1, sizeof *ctx
);
4156 oberon_scope_t
* world_scope
;
4157 world_scope
= oberon_open_scope(ctx
);
4158 ctx
-> world_scope
= world_scope
;
4160 ctx
-> import_module
= import_module
;
4162 oberon_generator_init_context(ctx
);
4164 register_default_types(ctx
);
4167 oberon_new_const(ctx
, "TRUE", oberon_make_boolean(ctx
, true));
4168 oberon_new_const(ctx
, "FALSE", oberon_make_boolean(ctx
, false));
4171 oberon_new_intrinsic(ctx
, "ABS", oberon_make_abs_call
, NULL
);
4172 oberon_new_intrinsic(ctx
, "ASH", oberon_make_ash_call
, NULL
);
4173 oberon_new_intrinsic(ctx
, "CAP", oberon_make_cap_call
, NULL
);
4174 oberon_new_intrinsic(ctx
, "MIN", oberon_make_min_call
, NULL
);
4175 oberon_new_intrinsic(ctx
, "MAX", oberon_make_max_call
, NULL
);
4176 oberon_new_intrinsic(ctx
, "ODD", oberon_make_odd_call
, NULL
);
4177 oberon_new_intrinsic(ctx
, "SIZE", oberon_make_size_call
, NULL
);
4180 oberon_new_intrinsic(ctx
, "NEW", NULL
, oberon_make_new_call
);
4181 oberon_new_intrinsic(ctx
, "COPY", NULL
, oberon_make_copy_call
);
4182 oberon_new_intrinsic(ctx
, "ASSERT", NULL
, oberon_make_assert_call
);
4183 oberon_new_intrinsic(ctx
, "HALT", NULL
, oberon_make_halt_call
);
4189 oberon_destroy_context(oberon_context_t
* ctx
)
4191 oberon_generator_destroy_context(ctx
);
4196 oberon_compile_module(oberon_context_t
* ctx
, const char * newcode
)
4198 const char * code
= ctx
-> code
;
4199 int code_index
= ctx
-> code_index
;
4201 int token
= ctx
-> token
;
4202 char * string
= ctx
-> string
;
4203 int integer
= ctx
-> integer
;
4204 int real
= ctx
-> real
;
4205 bool longmode
= ctx
-> longmode
;
4206 oberon_scope_t
* decl
= ctx
-> decl
;
4207 oberon_module_t
* mod
= ctx
-> mod
;
4209 oberon_scope_t
* module_scope
;
4210 module_scope
= oberon_open_scope(ctx
);
4212 oberon_module_t
* module
;
4213 module
= calloc(1, sizeof *module
);
4214 module
-> decl
= module_scope
;
4215 module
-> next
= ctx
-> module_list
;
4217 ctx
-> mod
= module
;
4218 ctx
-> module_list
= module
;
4220 oberon_init_scaner(ctx
, newcode
);
4221 oberon_parse_module(ctx
);
4223 module
-> ready
= 1;
4226 ctx
-> code_index
= code_index
;
4228 ctx
-> token
= token
;
4229 ctx
-> string
= string
;
4230 ctx
-> integer
= integer
;
4232 ctx
-> longmode
= longmode
;