13 #include "../include/oberon.h"
15 #include "oberon-internals.h"
16 #include "oberon-type-compat.h"
17 #include "oberon-common.h"
18 #include "generator.h"
20 // =======================================================================
22 // =======================================================================
25 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
);
27 static oberon_type_t
*
28 oberon_new_type_ptr(int class)
30 oberon_type_t
* x
= GC_MALLOC(sizeof *x
);
31 memset(x
, 0, sizeof *x
);
36 static oberon_type_t
*
37 oberon_new_type_integer(int size
)
40 x
= oberon_new_type_ptr(OBERON_TYPE_INTEGER
);
45 static oberon_type_t
*
46 oberon_new_type_boolean()
49 x
= oberon_new_type_ptr(OBERON_TYPE_BOOLEAN
);
53 static oberon_type_t
*
54 oberon_new_type_real(int size
)
57 x
= oberon_new_type_ptr(OBERON_TYPE_REAL
);
62 static oberon_type_t
*
63 oberon_new_type_char(int size
)
66 x
= oberon_new_type_ptr(OBERON_TYPE_CHAR
);
71 static oberon_type_t
*
72 oberon_new_type_string(int size
)
75 x
= oberon_new_type_ptr(OBERON_TYPE_STRING
);
80 static oberon_type_t
*
81 oberon_new_type_set(int size
)
84 x
= oberon_new_type_ptr(OBERON_TYPE_SET
);
89 static oberon_expr_t
*
90 oberon_new_operator(int op
, oberon_type_t
* result
, oberon_expr_t
* left
, oberon_expr_t
* right
)
92 oberon_oper_t
* operator;
93 operator = GC_MALLOC(sizeof *operator);
94 memset(operator, 0, sizeof *operator);
96 operator -> is_item
= 0;
97 operator -> result
= result
;
98 operator -> read_only
= 1;
100 operator -> left
= left
;
101 operator -> right
= right
;
103 return (oberon_expr_t
*) operator;
106 static oberon_expr_t
*
107 oberon_new_item(int mode
, oberon_type_t
* result
, int read_only
)
109 oberon_item_t
* item
;
110 item
= GC_MALLOC(sizeof *item
);
111 memset(item
, 0, sizeof *item
);
114 item
-> result
= result
;
115 item
-> read_only
= read_only
;
118 return (oberon_expr_t
*)item
;
121 static oberon_type_t
*
122 oberon_get_type_of_int_value(oberon_context_t
* ctx
, int64_t i
)
124 if(i
>= -128 && i
<= 127)
126 return ctx
-> byte_type
;
128 else if(i
>= -32768 && i
<= 32767)
130 return ctx
-> shortint_type
;
132 else if(i
>= -2147483648 && i
<= 2147483647)
134 return ctx
-> int_type
;
138 return ctx
-> longint_type
;
142 static oberon_expr_t
*
143 oberon_make_integer(oberon_context_t
* ctx
, int64_t i
)
145 oberon_expr_t
* expr
;
146 oberon_type_t
* result
;
147 result
= oberon_get_type_of_int_value(ctx
, i
);
148 expr
= oberon_new_item(MODE_INTEGER
, result
, true);
149 expr
-> item
.integer
= i
;
150 expr
-> item
.real
= i
;
154 static oberon_expr_t
*
155 oberon_make_system_byte(oberon_context_t
* ctx
, int64_t i
)
157 oberon_expr_t
* expr
;
158 expr
= oberon_new_item(MODE_SYSBYTE
, ctx
-> system_byte_type
, true);
159 expr
-> item
.integer
= i
;
160 expr
-> item
.real
= i
;
164 static oberon_expr_t
*
165 oberon_make_char(oberon_context_t
* ctx
, int64_t i
)
167 oberon_expr_t
* expr
;
168 expr
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
169 expr
-> item
.integer
= i
;
170 expr
-> item
.real
= i
;
174 static oberon_expr_t
*
175 oberon_make_string(oberon_context_t
* ctx
, char * str
)
177 oberon_expr_t
* expr
;
178 expr
= oberon_new_item(MODE_STRING
, ctx
-> string_type
, true);
179 expr
-> item
.integer
= str
[0];
180 expr
-> item
.real
= str
[0];
181 expr
-> item
.string
= str
;
185 static oberon_expr_t
*
186 oberon_make_real_typed(oberon_context_t
* ctx
, double r
, oberon_type_t
* result
)
188 oberon_expr_t
* expr
;
189 expr
= oberon_new_item(MODE_REAL
, result
, true);
190 expr
-> item
.integer
= r
;
191 expr
-> item
.real
= r
;
195 static oberon_expr_t
*
196 oberon_make_real(oberon_context_t
* ctx
, double r
, bool longmode
)
198 oberon_type_t
* result
;
199 result
= (longmode
) ? (ctx
-> longreal_type
) : (ctx
-> real_type
);
200 return oberon_make_real_typed(ctx
, r
, result
);
203 static oberon_expr_t
*
204 oberon_make_boolean(oberon_context_t
* ctx
, bool cond
)
206 oberon_expr_t
* expr
;
207 expr
= oberon_new_item(MODE_BOOLEAN
, ctx
-> bool_type
, true);
208 expr
-> item
.integer
= cond
;
209 expr
-> item
.real
= cond
;
213 static oberon_expr_t
*
214 oberon_make_set(oberon_context_t
* ctx
, int64_t i
)
216 oberon_expr_t
* expr
;
217 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
218 expr
-> item
.integer
= i
;
219 expr
-> item
.real
= i
;
223 static oberon_expr_t
*
224 oberon_make_set_index(oberon_context_t
* ctx
, int64_t i
)
226 oberon_expr_t
* expr
;
227 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
228 expr
-> item
.integer
= 1 << i
;
229 expr
-> item
.real
= 1 << i
;
233 static oberon_expr_t
*
234 oberon_make_set_range(oberon_context_t
* ctx
, int64_t x
, int64_t y
)
236 oberon_expr_t
* expr
;
237 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
238 expr
-> item
.integer
= (x
<= y
) ? ((2 << y
) - (1 << x
)) : (0);
239 expr
-> item
.real
= expr
-> item
.integer
;
243 // =======================================================================
245 // =======================================================================
247 static oberon_scope_t
*
248 oberon_open_scope(oberon_context_t
* ctx
)
250 oberon_scope_t
* scope
= GC_MALLOC(sizeof *scope
);
251 memset(scope
, 0, sizeof *scope
);
253 oberon_object_t
* list
= GC_MALLOC(sizeof *list
);
254 memset(list
, 0, sizeof *list
);
257 scope
-> list
= list
;
258 scope
-> up
= ctx
-> decl
;
262 scope
-> local
= scope
-> up
-> local
;
263 scope
-> parent
= scope
-> up
-> parent
;
264 scope
-> parent_type
= scope
-> up
-> parent_type
;
265 scope
-> exit_label
= scope
-> up
-> exit_label
;
273 oberon_close_scope(oberon_scope_t
* scope
)
275 oberon_context_t
* ctx
= scope
-> ctx
;
276 ctx
-> decl
= scope
-> up
;
279 static oberon_object_t
*
280 oberon_find_object_in_list(oberon_object_t
* list
, char * name
)
282 oberon_object_t
* x
= list
;
283 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
290 static oberon_object_t
*
291 oberon_find_object(oberon_scope_t
* scope
, char * name
, bool check_it
)
293 oberon_object_t
* result
= NULL
;
295 oberon_scope_t
* s
= scope
;
296 while(result
== NULL
&& s
!= NULL
)
298 result
= oberon_find_object_in_list(s
-> list
, name
);
302 if(check_it
&& result
== NULL
)
304 oberon_error(scope
-> ctx
, "undefined ident %s", name
);
310 static oberon_object_t
*
311 oberon_create_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
)
313 oberon_object_t
* newvar
= GC_MALLOC(sizeof *newvar
);
314 memset(newvar
, 0, sizeof *newvar
);
315 newvar
-> name
= name
;
316 newvar
-> class = class;
317 newvar
-> export
= export
;
318 newvar
-> read_only
= read_only
;
319 newvar
-> local
= scope
-> local
;
320 newvar
-> parent
= scope
-> parent
;
321 newvar
-> parent_type
= scope
-> parent_type
;
322 newvar
-> module
= scope
-> ctx
-> mod
;
326 static oberon_object_t
*
327 oberon_define_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
, bool check_upscope
)
331 if(oberon_find_object(scope
-> up
, name
, false))
333 oberon_error(scope
-> ctx
, "already defined");
337 oberon_object_t
* x
= scope
-> list
;
338 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
345 oberon_error(scope
-> ctx
, "already defined");
348 oberon_object_t
* newvar
;
349 newvar
= oberon_create_object(scope
, name
, class, export
, read_only
);
355 // =======================================================================
357 // =======================================================================
360 oberon_get_char(oberon_context_t
* ctx
)
362 if(ctx
-> code
[ctx
-> code_index
])
364 ctx
-> code_index
+= 1;
365 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
370 oberon_init_scaner(oberon_context_t
* ctx
, const char * code
)
373 ctx
-> code_index
= 0;
374 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
378 oberon_read_ident(oberon_context_t
* ctx
)
380 int start
= ctx
-> code_index
;
382 oberon_get_char(ctx
);
383 while(isalnum(ctx
-> c
) || ctx
-> c
== '_')
385 oberon_get_char(ctx
);
388 int end
= ctx
-> code_index
;
390 char * ident
= GC_MALLOC(end
- start
+ 1);
391 memcpy(ident
, &ctx
-> code
[start
], end
- start
);
392 ident
[end
- start
] = 0;
394 ctx
-> string
= ident
;
395 ctx
-> token
= IDENT
;
397 if(strcmp(ident
, "MODULE") == 0)
399 ctx
-> token
= MODULE
;
401 else if(strcmp(ident
, "END") == 0)
405 else if(strcmp(ident
, "VAR") == 0)
409 else if(strcmp(ident
, "BEGIN") == 0)
411 ctx
-> token
= BEGIN
;
413 else if(strcmp(ident
, "OR") == 0)
417 else if(strcmp(ident
, "DIV") == 0)
421 else if(strcmp(ident
, "MOD") == 0)
425 else if(strcmp(ident
, "PROCEDURE") == 0)
427 ctx
-> token
= PROCEDURE
;
429 else if(strcmp(ident
, "RETURN") == 0)
431 ctx
-> token
= RETURN
;
433 else if(strcmp(ident
, "CONST") == 0)
435 ctx
-> token
= CONST
;
437 else if(strcmp(ident
, "TYPE") == 0)
441 else if(strcmp(ident
, "ARRAY") == 0)
443 ctx
-> token
= ARRAY
;
445 else if(strcmp(ident
, "OF") == 0)
449 else if(strcmp(ident
, "RECORD") == 0)
451 ctx
-> token
= RECORD
;
453 else if(strcmp(ident
, "POINTER") == 0)
455 ctx
-> token
= POINTER
;
457 else if(strcmp(ident
, "TO") == 0)
461 else if(strcmp(ident
, "NIL") == 0)
465 else if(strcmp(ident
, "IMPORT") == 0)
467 ctx
-> token
= IMPORT
;
469 else if(strcmp(ident
, "IN") == 0)
473 else if(strcmp(ident
, "IS") == 0)
477 else if(strcmp(ident
, "IF") == 0)
481 else if(strcmp(ident
, "THEN") == 0)
485 else if(strcmp(ident
, "ELSE") == 0)
489 else if(strcmp(ident
, "ELSIF") == 0)
491 ctx
-> token
= ELSIF
;
493 else if(strcmp(ident
, "WHILE") == 0)
495 ctx
-> token
= WHILE
;
497 else if(strcmp(ident
, "DO") == 0)
501 else if(strcmp(ident
, "REPEAT") == 0)
503 ctx
-> token
= REPEAT
;
505 else if(strcmp(ident
, "UNTIL") == 0)
507 ctx
-> token
= UNTIL
;
509 else if(strcmp(ident
, "FOR") == 0)
513 else if(strcmp(ident
, "BY") == 0)
517 else if(strcmp(ident
, "LOOP") == 0)
521 else if(strcmp(ident
, "EXIT") == 0)
525 else if(strcmp(ident
, "CASE") == 0)
529 else if(strcmp(ident
, "WITH") == 0)
535 #define ISHEXDIGIT(x) \
536 (((x) >= '0' && (x) <= '9') || ((x) >= 'A' && (x) <= 'F'))
539 oberon_read_number(oberon_context_t
* ctx
)
552 * mode = 3 == LONGREAL
556 start_i
= ctx
-> code_index
;
558 while(isdigit(ctx
-> c
))
560 oberon_get_char(ctx
);
563 end_i
= ctx
-> code_index
;
565 if(ISHEXDIGIT(ctx
-> c
))
568 while(ISHEXDIGIT(ctx
-> c
))
570 oberon_get_char(ctx
);
573 end_i
= ctx
-> code_index
;
578 oberon_get_char(ctx
);
580 else if(ctx
-> c
== 'X')
583 oberon_get_char(ctx
);
587 oberon_error(ctx
, "invalid hex number");
590 else if(ctx
-> c
== '.')
592 oberon_get_char(ctx
);
595 /* Чит: избегаем конфликта с DOTDOT */
596 ctx
-> code_index
-= 1;
602 while(isdigit(ctx
-> c
))
604 oberon_get_char(ctx
);
607 if(ctx
-> c
== 'E' || ctx
-> c
== 'D')
609 exp_i
= ctx
-> code_index
;
616 oberon_get_char(ctx
);
618 if(ctx
-> c
== '+' || ctx
-> c
== '-')
620 oberon_get_char(ctx
);
623 while(isdigit(ctx
-> c
))
625 oberon_get_char(ctx
);
629 end_i
= ctx
-> code_index
;
637 oberon_get_char(ctx
);
639 else if(ctx
-> c
== 'X')
642 oberon_get_char(ctx
);
646 int len
= end_i
- start_i
;
647 ident
= GC_MALLOC(len
+ 1);
648 memcpy(ident
, &ctx
-> code
[start_i
], len
);
651 ctx
-> longmode
= false;
654 int i
= exp_i
- start_i
;
656 ctx
-> longmode
= true;
662 integer
= atol(ident
);
664 ctx
-> token
= INTEGER
;
667 sscanf(ident
, "%lx", &integer
);
669 ctx
-> token
= INTEGER
;
673 sscanf(ident
, "%lf", &real
);
678 sscanf(ident
, "%lx", &integer
);
683 oberon_error(ctx
, "oberon_read_number: wat");
687 ctx
-> string
= ident
;
688 ctx
-> integer
= integer
;
693 oberon_skip_space(oberon_context_t
* ctx
)
695 while(isspace(ctx
-> c
))
697 oberon_get_char(ctx
);
702 oberon_read_comment(oberon_context_t
* ctx
)
709 oberon_get_char(ctx
);
712 oberon_get_char(ctx
);
716 else if(ctx
-> c
== '*')
718 oberon_get_char(ctx
);
721 oberon_get_char(ctx
);
725 else if(ctx
-> c
== 0)
727 oberon_error(ctx
, "unterminated comment");
731 oberon_get_char(ctx
);
736 static void oberon_read_string(oberon_context_t
* ctx
)
739 oberon_get_char(ctx
);
741 int start
= ctx
-> code_index
;
743 while(ctx
-> c
!= 0 && ctx
-> c
!= c
)
745 oberon_get_char(ctx
);
750 oberon_error(ctx
, "unterminated string");
753 int end
= ctx
-> code_index
;
755 oberon_get_char(ctx
);
757 char * string
= GC_MALLOC(end
- start
+ 1);
758 strncpy(string
, &ctx
-> code
[start
], end
- start
);
759 string
[end
- start
] = 0;
761 ctx
-> token
= STRING
;
762 ctx
-> string
= string
;
763 ctx
-> integer
= string
[0];
766 static void oberon_read_token(oberon_context_t
* ctx
);
769 oberon_read_symbol(oberon_context_t
* ctx
)
778 ctx
-> token
= SEMICOLON
;
779 oberon_get_char(ctx
);
782 ctx
-> token
= COLON
;
783 oberon_get_char(ctx
);
786 ctx
-> token
= ASSIGN
;
787 oberon_get_char(ctx
);
792 oberon_get_char(ctx
);
795 ctx
-> token
= DOTDOT
;
796 oberon_get_char(ctx
);
800 ctx
-> token
= LPAREN
;
801 oberon_get_char(ctx
);
804 oberon_get_char(ctx
);
805 oberon_read_comment(ctx
);
806 oberon_read_token(ctx
);
810 ctx
-> token
= RPAREN
;
811 oberon_get_char(ctx
);
814 ctx
-> token
= EQUAL
;
815 oberon_get_char(ctx
);
819 oberon_get_char(ctx
);
823 oberon_get_char(ctx
);
827 oberon_get_char(ctx
);
831 ctx
-> token
= GREAT
;
832 oberon_get_char(ctx
);
836 oberon_get_char(ctx
);
841 oberon_get_char(ctx
);
844 ctx
-> token
= MINUS
;
845 oberon_get_char(ctx
);
849 oberon_get_char(ctx
);
852 oberon_get_char(ctx
);
853 oberon_error(ctx
, "unstarted comment");
857 ctx
-> token
= SLASH
;
858 oberon_get_char(ctx
);
862 oberon_get_char(ctx
);
866 oberon_get_char(ctx
);
869 ctx
-> token
= COMMA
;
870 oberon_get_char(ctx
);
873 ctx
-> token
= LBRACK
;
874 oberon_get_char(ctx
);
877 ctx
-> token
= RBRACK
;
878 oberon_get_char(ctx
);
881 ctx
-> token
= UPARROW
;
882 oberon_get_char(ctx
);
885 oberon_read_string(ctx
);
888 oberon_read_string(ctx
);
891 ctx
-> token
= LBRACE
;
892 oberon_get_char(ctx
);
895 ctx
-> token
= RBRACE
;
896 oberon_get_char(ctx
);
900 oberon_get_char(ctx
);
903 oberon_error(ctx
, "invalid char %c", ctx
-> c
);
909 oberon_read_token(oberon_context_t
* ctx
)
911 oberon_skip_space(ctx
);
914 if(isalpha(c
) || c
== '_')
916 oberon_read_ident(ctx
);
920 oberon_read_number(ctx
);
924 oberon_read_symbol(ctx
);
928 // =======================================================================
930 // =======================================================================
932 static void oberon_expect_token(oberon_context_t
* ctx
, int token
);
933 static oberon_expr_t
* oberon_expr(oberon_context_t
* ctx
);
934 static void oberon_assert_token(oberon_context_t
* ctx
, int token
);
935 static char * oberon_assert_ident(oberon_context_t
* ctx
);
936 static void oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
);
937 static oberon_item_t
* oberon_const_expr(oberon_context_t
* ctx
);
938 static oberon_expr_t
* oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
);
939 static bool oberon_is_const(oberon_expr_t
* expr
);
941 static oberon_expr_t
*
942 oberon_make_unary_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
)
944 oberon_expr_t
* expr
;
945 oberon_type_t
* result
;
947 result
= a
-> result
;
951 if(result
-> class == OBERON_TYPE_SET
)
953 if(oberon_is_const(a
))
955 expr
= oberon_make_set(ctx
, ~(a
-> item
.integer
));
959 expr
= oberon_new_operator(OP_COMPLEMENTATION
, result
, a
, NULL
);
962 else if(result
-> class == OBERON_TYPE_INTEGER
)
964 if(oberon_is_const(a
))
966 expr
= oberon_make_integer(ctx
, -(a
-> item
.integer
));
970 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
973 else if(result
-> class == OBERON_TYPE_REAL
)
975 if(oberon_is_const(a
))
977 expr
= oberon_make_real_typed(ctx
, -(a
-> item
.real
), result
);
981 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
986 oberon_error(ctx
, "incompatible operator type");
989 else if(token
== NOT
)
991 if(result
-> class != OBERON_TYPE_BOOLEAN
)
993 oberon_error(ctx
, "incompatible operator type");
996 if(oberon_is_const(a
))
998 expr
= oberon_make_boolean(ctx
, !(a
-> item
.integer
));
1002 expr
= oberon_new_operator(OP_LOGIC_NOT
, result
, a
, NULL
);
1007 oberon_error(ctx
, "oberon_make_unary_op: wat");
1014 oberon_expr_list(oberon_context_t
* ctx
, int * num_expr
, oberon_expr_t
** first
, int const_expr
)
1016 oberon_expr_t
* last
;
1021 *first
= last
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1025 *first
= last
= oberon_expr(ctx
);
1027 while(ctx
-> token
== COMMA
)
1029 oberon_assert_token(ctx
, COMMA
);
1030 oberon_expr_t
* current
;
1034 current
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1038 current
= oberon_expr(ctx
);
1041 last
-> next
= current
;
1047 static oberon_expr_t
*
1048 oberon_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1050 oberon_expr_t
* cast
;
1052 if((oberon_is_char_type(pref
) && oberon_is_const_string(expr
) && strlen(expr
-> item
.string
) == 1))
1054 /* Автоматически преобразуем строку единичного размера в символ */
1055 cast
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
1056 cast
-> item
.integer
= expr
-> item
.string
[0];
1058 else if(!oberon_is_some_types(expr
-> result
, pref
))
1060 cast
= oberon_new_operator(OP_CAST
, pref
, expr
, NULL
);
1070 static oberon_expr_t
*
1071 oberon_hard_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1073 return oberon_new_operator(OP_HARDCAST
, pref
, expr
, NULL
);
1077 oberon_check_dst(oberon_context_t
* ctx
, oberon_expr_t
* dst
)
1079 if(dst
-> read_only
)
1081 oberon_error(ctx
, "read-only destination");
1084 if(dst
-> is_item
== false)
1086 oberon_error(ctx
, "not variable");
1089 switch(dst
-> item
.mode
)
1100 oberon_error(ctx
, "not variable");
1106 oberon_check_src(oberon_context_t
* ctx
, oberon_expr_t
* src
)
1110 if(src
-> item
.mode
== MODE_TYPE
)
1112 oberon_error(ctx
, "not variable");
1118 oberon_autocast_call(oberon_context_t
* ctx
, oberon_item_t
* desig
)
1120 if(desig
-> mode
!= MODE_CALL
)
1122 oberon_error(ctx
, "expected mode CALL");
1125 oberon_type_t
* fn
= desig
-> parent
-> result
;
1126 int num_args
= desig
-> num_args
;
1127 int num_decl
= fn
-> num_decl
;
1129 if(num_args
< num_decl
)
1131 oberon_error(ctx
, "too few arguments");
1133 else if(num_args
> num_decl
)
1135 oberon_error(ctx
, "too many arguments");
1138 /* Делаем проверку на запись и делаем автокаст */
1139 oberon_expr_t
* casted
[num_args
];
1140 oberon_expr_t
* arg
= desig
-> args
;
1141 oberon_object_t
* param
= fn
-> decl
;
1142 for(int i
= 0; i
< num_args
; i
++)
1144 if(param
-> class == OBERON_CLASS_VAR_PARAM
)
1146 oberon_check_dst(ctx
, arg
);
1147 if(!oberon_is_compatible_arrays(param
, arg
))
1149 oberon_check_compatible_var_param(ctx
, param
-> type
, arg
-> result
);
1152 //casted[i] = oberon_cast_expr(ctx, arg, param -> type);
1156 oberon_check_src(ctx
, arg
);
1157 if(!oberon_is_compatible_arrays(param
, arg
))
1159 oberon_check_assignment_compatible(ctx
, arg
, param
-> type
);
1161 casted
[i
] = oberon_cast_expr(ctx
, arg
, param
-> type
);
1165 param
= param
-> next
;
1168 /* Создаём новый список выражений */
1172 for(int i
= 0; i
< num_args
- 1; i
++)
1174 casted
[i
] -> next
= casted
[i
+ 1];
1176 desig
-> args
= arg
;
1180 static oberon_expr_t
*
1181 oberon_make_call_func(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1183 oberon_type_t
* signature
= item
-> result
;
1184 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1186 oberon_error(ctx
, "not a procedure");
1189 oberon_expr_t
* call
;
1191 if(signature
-> sysproc
)
1193 if(signature
-> genfunc
== NULL
)
1195 oberon_error(ctx
, "not a function-procedure");
1198 call
= signature
-> genfunc(ctx
, num_args
, list_args
);
1202 if(signature
-> base
-> class == OBERON_TYPE_NOTYPE
)
1204 oberon_error(ctx
, "attempt to call procedure in expression");
1207 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1208 call
-> item
.parent
= item
;
1209 call
-> item
.num_args
= num_args
;
1210 call
-> item
.args
= list_args
;
1211 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1218 oberon_make_call_proc(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1220 oberon_type_t
* signature
= item
-> result
;
1221 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1223 oberon_error(ctx
, "not a procedure");
1226 oberon_expr_t
* call
;
1228 if(signature
-> sysproc
)
1230 if(signature
-> genproc
== NULL
)
1232 oberon_error(ctx
, "not a procedure");
1235 signature
-> genproc(ctx
, num_args
, list_args
);
1239 if(signature
-> base
-> class != OBERON_TYPE_NOTYPE
)
1241 oberon_error(ctx
, "attempt to call function as non-typed procedure");
1244 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1245 call
-> item
.parent
= item
;
1246 call
-> item
.num_args
= num_args
;
1247 call
-> item
.args
= list_args
;
1248 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1249 oberon_generate_call_proc(ctx
, call
);
1257 || ((x) == INTEGER) \
1260 || ((x) == STRING) \
1262 || ((x) == LPAREN) \
1265 static oberon_expr_t
*
1266 oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1268 if(expr
-> result
-> class != OBERON_TYPE_POINTER
)
1270 oberon_error(ctx
, "not a pointer");
1273 assert(expr
-> is_item
);
1275 oberon_expr_t
* selector
;
1276 selector
= oberon_new_item(MODE_DEREF
, expr
-> result
-> base
, false);
1277 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1282 static oberon_expr_t
*
1283 oberon_make_array_selector(oberon_context_t
* ctx
, oberon_expr_t
* desig
, oberon_expr_t
* index
)
1285 if(desig
-> result
-> class == OBERON_TYPE_POINTER
)
1287 desig
= oberno_make_dereferencing(ctx
, desig
);
1290 assert(desig
-> is_item
);
1292 if(desig
-> result
-> class != OBERON_TYPE_ARRAY
)
1294 oberon_error(ctx
, "not array");
1297 oberon_type_t
* base
;
1298 base
= desig
-> result
-> base
;
1300 if(index
-> result
-> class != OBERON_TYPE_INTEGER
)
1302 oberon_error(ctx
, "index must be integer");
1305 // Статическая проверка границ массива
1306 if(desig
-> result
-> size
!= 0)
1308 if(index
-> is_item
)
1310 if(index
-> item
.mode
== MODE_INTEGER
)
1312 int arr_size
= desig
-> result
-> size
;
1313 int index_int
= index
-> item
.integer
;
1314 if(index_int
< 0 || index_int
> arr_size
- 1)
1316 oberon_error(ctx
, "not in range (dimension size 0..%i)", arr_size
- 1);
1322 oberon_expr_t
* selector
;
1323 selector
= oberon_new_item(MODE_INDEX
, base
, desig
-> read_only
);
1324 selector
-> item
.parent
= (oberon_item_t
*) desig
;
1325 selector
-> item
.num_args
= 1;
1326 selector
-> item
.args
= index
;
1331 static oberon_expr_t
*
1332 oberon_make_record_selector(oberon_context_t
* ctx
, oberon_expr_t
* expr
, char * name
)
1334 if(expr
-> result
-> class == OBERON_TYPE_POINTER
)
1336 expr
= oberno_make_dereferencing(ctx
, expr
);
1339 assert(expr
-> is_item
);
1341 if(expr
-> result
-> class != OBERON_TYPE_RECORD
)
1343 oberon_error(ctx
, "not record");
1346 oberon_type_t
* rec
= expr
-> result
;
1348 oberon_object_t
* field
;
1349 field
= oberon_find_object(rec
-> scope
, name
, true);
1351 if(field
-> export
== 0)
1353 if(field
-> module
!= ctx
-> mod
)
1355 oberon_error(ctx
, "field not exported");
1359 int read_only
= expr
-> read_only
;
1360 if(field
-> read_only
)
1362 if(field
-> module
!= ctx
-> mod
)
1368 oberon_expr_t
* selector
;
1369 selector
= oberon_new_item(MODE_FIELD
, field
-> type
, read_only
);
1370 selector
-> item
.var
= field
;
1371 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1376 #define ISSELECTOR(x) \
1379 || ((x) == UPARROW) \
1382 static oberon_object_t
*
1383 oberon_qualident(oberon_context_t
* ctx
, char ** xname
, int check
)
1386 oberon_object_t
* x
;
1388 name
= oberon_assert_ident(ctx
);
1389 x
= oberon_find_object(ctx
-> decl
, name
, check
);
1393 if(x
-> class == OBERON_CLASS_MODULE
)
1395 oberon_assert_token(ctx
, DOT
);
1396 name
= oberon_assert_ident(ctx
);
1397 /* Наличие объектов в левых модулях всегда проверяется */
1398 x
= oberon_find_object(x
-> module
-> decl
, name
, 1);
1400 if(x
-> export
== 0)
1402 oberon_error(ctx
, "not exported");
1415 static oberon_expr_t
*
1416 oberon_ident_item(oberon_context_t
* ctx
, char * name
)
1419 oberon_object_t
* x
;
1420 oberon_expr_t
* expr
;
1422 x
= oberon_find_object(ctx
-> decl
, name
, true);
1425 if(x
-> class == OBERON_CLASS_CONST
|| x
-> class == OBERON_CLASS_PROC
)
1430 expr
= oberon_new_item(MODE_VAR
, x
-> type
, read_only
);
1431 expr
-> item
.var
= x
;
1435 static oberon_expr_t
*
1436 oberon_qualident_expr(oberon_context_t
* ctx
)
1438 oberon_object_t
* var
;
1439 oberon_expr_t
* expr
;
1441 var
= oberon_qualident(ctx
, NULL
, 1);
1444 if(var
-> read_only
)
1446 if(var
-> module
!= ctx
-> mod
)
1452 switch(var
-> class)
1454 case OBERON_CLASS_CONST
:
1456 expr
= (oberon_expr_t
*) var
-> value
;
1458 case OBERON_CLASS_TYPE
:
1459 expr
= oberon_new_item(MODE_TYPE
, var
-> type
, read_only
);
1461 case OBERON_CLASS_VAR
:
1462 case OBERON_CLASS_VAR_PARAM
:
1463 case OBERON_CLASS_PARAM
:
1464 expr
= oberon_new_item(MODE_VAR
, var
-> type
, read_only
);
1466 case OBERON_CLASS_PROC
:
1467 expr
= oberon_new_item(MODE_VAR
, var
-> type
, true);
1470 oberon_error(ctx
, "invalid designator");
1474 expr
-> item
.var
= var
;
1479 static oberon_expr_t
*
1480 oberon_designator(oberon_context_t
* ctx
)
1483 oberon_expr_t
* expr
;
1484 oberon_object_t
* objtype
;
1486 expr
= oberon_qualident_expr(ctx
);
1488 while(expr
-> result
-> class != OBERON_TYPE_PROCEDURE
&& ISSELECTOR(ctx
-> token
))
1490 switch(ctx
-> token
)
1493 oberon_assert_token(ctx
, DOT
);
1494 name
= oberon_assert_ident(ctx
);
1495 expr
= oberon_make_record_selector(ctx
, expr
, name
);
1498 oberon_assert_token(ctx
, LBRACK
);
1499 int num_indexes
= 0;
1500 oberon_expr_t
* indexes
= NULL
;
1501 oberon_expr_list(ctx
, &num_indexes
, &indexes
, 0);
1502 oberon_assert_token(ctx
, RBRACK
);
1504 for(int i
= 0; i
< num_indexes
; i
++)
1506 expr
= oberon_make_array_selector(ctx
, expr
, indexes
);
1507 indexes
= indexes
-> next
;
1511 oberon_assert_token(ctx
, UPARROW
);
1512 expr
= oberno_make_dereferencing(ctx
, expr
);
1515 oberon_assert_token(ctx
, LPAREN
);
1516 objtype
= oberon_qualident(ctx
, NULL
, true);
1517 oberon_assert_token(ctx
, RPAREN
);
1518 oberon_check_extension_of(ctx
, expr
-> result
, objtype
-> type
);
1519 expr
= oberon_cast_expr(ctx
, expr
, objtype
-> type
);
1522 oberon_error(ctx
, "oberon_designator: wat");
1530 static oberon_expr_t
*
1531 oberon_opt_func_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1533 /* Если есть скобки - значит вызов. Если нет, то передаём указатель. */
1534 if(ctx
-> token
== LPAREN
)
1536 oberon_assert_token(ctx
, LPAREN
);
1539 oberon_expr_t
* arguments
= NULL
;
1541 if(ISEXPR(ctx
-> token
))
1543 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1546 assert(expr
-> is_item
== 1);
1547 expr
= oberon_make_call_func(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1549 oberon_assert_token(ctx
, RPAREN
);
1556 oberon_opt_proc_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1558 assert(expr
-> is_item
);
1561 oberon_expr_t
* arguments
= NULL
;
1563 if(ctx
-> token
== LPAREN
)
1565 oberon_assert_token(ctx
, LPAREN
);
1567 if(ISEXPR(ctx
-> token
))
1569 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1572 oberon_assert_token(ctx
, RPAREN
);
1575 /* Вызов происходит даже без скобок */
1576 oberon_make_call_proc(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1579 static oberon_expr_t
*
1580 oberon_element(oberon_context_t
* ctx
)
1585 e1
= oberon_expr(ctx
);
1586 oberon_check_src(ctx
, e1
);
1587 if(e1
-> result
-> class != OBERON_TYPE_INTEGER
)
1589 oberon_error(ctx
, "expected integer");
1593 if(ctx
-> token
== DOTDOT
)
1595 oberon_assert_token(ctx
, DOTDOT
);
1596 e2
= oberon_expr(ctx
);
1597 oberon_check_src(ctx
, e2
);
1598 if(e2
-> result
-> class != OBERON_TYPE_INTEGER
)
1600 oberon_error(ctx
, "expected integer");
1604 oberon_expr_t
* set
;
1605 if(e2
== NULL
&& oberon_is_const(e1
))
1607 set
= oberon_make_set_index(ctx
, e1
-> item
.integer
);
1609 else if(e2
!= NULL
&& oberon_is_const(e1
) && oberon_is_const(e2
))
1611 set
= oberon_make_set_range(ctx
, e1
-> item
.integer
, e2
-> item
.integer
);
1615 set
= oberon_new_operator(OP_RANGE
, ctx
-> set_type
, e1
, e2
);
1620 static oberon_expr_t
*
1621 oberon_make_set_union(oberon_context_t
* ctx
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1623 if(oberon_is_const(a
) && oberon_is_const(b
))
1625 return oberon_make_set(ctx
, (a
-> item
.integer
| b
-> item
.integer
));
1629 return oberon_new_operator(OP_UNION
, ctx
-> set_type
, a
, b
);
1633 static oberon_expr_t
*
1634 oberon_set(oberon_context_t
* ctx
)
1636 oberon_expr_t
* set
;
1637 oberon_expr_t
* elements
;
1638 set
= oberon_make_set(ctx
, 0);
1640 oberon_assert_token(ctx
, LBRACE
);
1641 if(ISEXPR(ctx
-> token
))
1643 elements
= oberon_element(ctx
);
1644 set
= oberon_make_set_union(ctx
, set
, elements
);
1645 while(ctx
-> token
== COMMA
)
1647 oberon_assert_token(ctx
, COMMA
);
1648 elements
= oberon_element(ctx
);
1649 set
= oberon_make_set_union(ctx
, set
, elements
);
1652 oberon_assert_token(ctx
, RBRACE
);
1657 static oberon_expr_t
*
1658 oberon_factor(oberon_context_t
* ctx
)
1660 oberon_expr_t
* expr
;
1661 oberon_type_t
* result
;
1663 switch(ctx
-> token
)
1666 expr
= oberon_designator(ctx
);
1667 expr
= oberon_opt_func_parens(ctx
, expr
);
1670 expr
= oberon_make_integer(ctx
, ctx
-> integer
);
1671 oberon_assert_token(ctx
, INTEGER
);
1674 result
= ctx
-> char_type
;
1675 expr
= oberon_new_item(MODE_CHAR
, result
, true);
1676 expr
-> item
.integer
= ctx
-> integer
;
1677 oberon_assert_token(ctx
, CHAR
);
1680 expr
= oberon_make_string(ctx
, ctx
-> string
);
1681 oberon_assert_token(ctx
, STRING
);
1684 expr
= oberon_make_real(ctx
, ctx
-> real
, ctx
-> longmode
);
1685 oberon_assert_token(ctx
, REAL
);
1688 expr
= oberon_set(ctx
);
1691 oberon_assert_token(ctx
, LPAREN
);
1692 expr
= oberon_expr(ctx
);
1693 oberon_assert_token(ctx
, RPAREN
);
1696 oberon_assert_token(ctx
, NOT
);
1697 expr
= oberon_factor(ctx
);
1698 expr
= oberon_make_unary_op(ctx
, NOT
, expr
);
1701 oberon_assert_token(ctx
, NIL
);
1702 expr
= oberon_new_item(MODE_NIL
, ctx
-> nil_type
, true);
1705 oberon_error(ctx
, "invalid expression");
1711 static oberon_expr_t
*
1712 oberon_make_bin_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1714 oberon_expr_t
* expr
;
1715 oberon_type_t
* result
;
1717 oberon_check_compatible_bin_expr(ctx
, token
, a
, b
);
1718 oberon_check_src(ctx
, a
);
1721 oberon_check_src(ctx
, b
);
1726 if(oberon_is_const(a
) && oberon_is_const(b
))
1728 expr
= oberon_make_boolean(ctx
, (1 << a
-> item
.integer
) & b
-> item
.integer
);
1732 expr
= oberon_new_operator(OP_IN
, ctx
-> bool_type
, a
, b
);
1735 else if(token
== IS
)
1737 oberon_check_type_expr(ctx
, b
);
1738 expr
= oberon_new_operator(OP_IS
, ctx
-> bool_type
, a
, b
);
1740 else if((token
>= EQUAL
&& token
<= GEQ
) || token
== OR
|| token
== AND
)
1742 if(oberon_is_string_of_one(a
) && oberon_is_char_type(b
-> result
))
1744 result
= b
-> result
;
1746 else if(oberon_is_string_of_one(b
) && oberon_is_char_type(a
-> result
))
1748 result
= a
-> result
;
1750 else if(oberon_is_string_of_one(a
) && oberon_is_string_of_one(b
))
1752 result
= ctx
-> char_type
;
1756 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1759 if(oberon_is_const(a
) && oberon_is_const(b
)
1760 && (oberon_is_real_type(result
) || oberon_is_integer_type(result
)))
1762 if(oberon_is_real_type(result
))
1764 double x
= a
-> item
.real
;
1765 double y
= b
-> item
.real
;
1768 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1769 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1770 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1771 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1772 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1773 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1774 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1775 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1776 default: assert(0); break;
1779 else if(oberon_is_integer_type(result
))
1781 int64_t x
= a
-> item
.integer
;
1782 int64_t y
= b
-> item
.integer
;
1785 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1786 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1787 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1788 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1789 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1790 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1791 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1792 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1793 default: assert(0); break;
1803 a
= oberon_cast_expr(ctx
, a
, result
);
1804 b
= oberon_cast_expr(ctx
, b
, result
);
1805 result
= ctx
-> bool_type
;
1808 case EQUAL
: expr
= oberon_new_operator(OP_EQ
, result
, a
, b
); break;
1809 case NEQ
: expr
= oberon_new_operator(OP_NEQ
, result
, a
, b
); break;
1810 case LESS
: expr
= oberon_new_operator(OP_LSS
, result
, a
, b
); break;
1811 case LEQ
: expr
= oberon_new_operator(OP_LEQ
, result
, a
, b
); break;
1812 case GREAT
: expr
= oberon_new_operator(OP_GRT
, result
, a
, b
); break;
1813 case GEQ
: expr
= oberon_new_operator(OP_GEQ
, result
, a
, b
); break;
1814 case OR
: expr
= oberon_new_operator(OP_LOGIC_OR
, result
, a
, b
); break;
1815 case AND
: expr
= oberon_new_operator(OP_LOGIC_AND
, result
, a
, b
); break;
1816 default: assert(0); break;
1820 else if(token
== SLASH
)
1822 if(oberon_is_set_type(a
-> result
) && oberon_is_set_type(b
-> result
))
1824 if(oberon_is_const(a
) && oberon_is_const(b
))
1826 int64_t x
= a
-> item
.integer
;
1827 int64_t y
= b
-> item
.integer
;
1828 expr
= oberon_make_set(ctx
, x
^ y
);
1832 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1833 a
= oberon_cast_expr(ctx
, a
, result
);
1834 b
= oberon_cast_expr(ctx
, b
, result
);
1835 expr
= oberon_new_operator(OP_SYM_DIFFERENCE
, result
, a
, b
);
1840 result
= oberon_get_longer_real_type(ctx
, a
-> result
, b
-> result
);
1841 if(oberon_is_const(a
) && oberon_is_const(b
))
1843 double x
= a
-> item
.real
;
1844 double y
= b
-> item
.real
;
1845 expr
= oberon_make_real_typed(ctx
, x
/ y
, result
);
1849 a
= oberon_cast_expr(ctx
, a
, result
);
1850 b
= oberon_cast_expr(ctx
, b
, result
);
1851 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
1857 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1859 if(oberon_is_const(a
) && oberon_is_const(b
))
1861 if(oberon_is_set_type(result
))
1863 int64_t x
= a
-> item
.integer
;
1864 int64_t y
= b
-> item
.integer
;
1867 case PLUS
: expr
= oberon_make_set(ctx
, x
| y
); break;
1868 case MINUS
: expr
= oberon_make_set(ctx
, x
& ~y
); break;
1869 case STAR
: expr
= oberon_make_set(ctx
, x
& y
); break;
1870 default: assert(0); break;
1873 if(oberon_is_real_type(result
))
1875 double x
= a
-> item
.real
;
1876 double y
= b
-> item
.real
;
1879 case PLUS
: expr
= oberon_make_real_typed(ctx
, x
+ y
, result
); break;
1880 case MINUS
: expr
= oberon_make_real_typed(ctx
, x
- y
, result
); break;
1881 case STAR
: expr
= oberon_make_real_typed(ctx
, x
* y
, result
); break;
1882 default: assert(0); break;
1885 else if(oberon_is_integer_type(result
))
1887 int64_t x
= a
-> item
.integer
;
1888 int64_t y
= b
-> item
.integer
;
1891 case PLUS
: expr
= oberon_make_integer(ctx
, x
+ y
); break;
1892 case MINUS
: expr
= oberon_make_integer(ctx
, x
- y
); break;
1893 case STAR
: expr
= oberon_make_integer(ctx
, x
* y
); break;
1894 case DIV
: expr
= oberon_make_integer(ctx
, x
/ y
); break;
1895 case MOD
: expr
= oberon_make_integer(ctx
, x
% y
); break;
1896 default: assert(0); break;
1906 a
= oberon_cast_expr(ctx
, a
, result
);
1907 b
= oberon_cast_expr(ctx
, b
, result
);
1910 if(oberon_is_set_type(result
))
1915 expr
= oberon_new_operator(OP_UNION
, result
, a
, b
);
1918 expr
= oberon_new_operator(OP_DIFFERENCE
, result
, a
, b
);
1921 expr
= oberon_new_operator(OP_INTERSECTION
, result
, a
, b
);
1928 else if(oberon_is_number_type(result
))
1933 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
1936 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
1939 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
1956 #define ISMULOP(x) \
1957 ((x) >= STAR && (x) <= AND)
1959 static oberon_expr_t
*
1960 oberon_term_expr(oberon_context_t
* ctx
)
1962 oberon_expr_t
* expr
;
1964 expr
= oberon_factor(ctx
);
1965 while(ISMULOP(ctx
-> token
))
1967 int token
= ctx
-> token
;
1968 oberon_read_token(ctx
);
1970 oberon_expr_t
* inter
= oberon_factor(ctx
);
1971 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
1977 #define ISADDOP(x) \
1978 ((x) >= PLUS && (x) <= OR)
1980 static oberon_expr_t
*
1981 oberon_simple_expr(oberon_context_t
* ctx
)
1983 oberon_expr_t
* expr
;
1986 if(ctx
-> token
== PLUS
)
1989 oberon_assert_token(ctx
, PLUS
);
1991 else if(ctx
-> token
== MINUS
)
1994 oberon_assert_token(ctx
, MINUS
);
1997 expr
= oberon_term_expr(ctx
);
1999 while(ISADDOP(ctx
-> token
))
2001 int token
= ctx
-> token
;
2002 oberon_read_token(ctx
);
2004 oberon_expr_t
* inter
= oberon_term_expr(ctx
);
2005 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2010 expr
= oberon_make_unary_op(ctx
, MINUS
, expr
);
2016 #define ISRELATION(x) \
2017 ((x) >= EQUAL && (x) <= IS)
2019 static oberon_expr_t
*
2020 oberon_expr(oberon_context_t
* ctx
)
2022 oberon_expr_t
* expr
;
2024 expr
= oberon_simple_expr(ctx
);
2025 while(ISRELATION(ctx
-> token
))
2027 int token
= ctx
-> token
;
2028 oberon_read_token(ctx
);
2030 oberon_expr_t
* inter
= oberon_simple_expr(ctx
);
2031 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2038 oberon_is_const(oberon_expr_t
* expr
)
2040 if(expr
-> is_item
== false)
2045 switch(expr
-> item
.mode
)
2067 oberon_check_const(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2069 if(!oberon_is_const(expr
))
2071 oberon_error(ctx
, "const expression are required");
2075 static oberon_item_t
*
2076 oberon_const_expr(oberon_context_t
* ctx
)
2078 oberon_expr_t
* expr
;
2079 expr
= oberon_expr(ctx
);
2080 oberon_check_const(ctx
, expr
);
2081 return (oberon_item_t
*) expr
;
2084 // =======================================================================
2086 // =======================================================================
2088 static void oberon_decl_seq(oberon_context_t
* ctx
);
2089 static void oberon_statement_seq(oberon_context_t
* ctx
);
2090 static void oberon_initialize_decl(oberon_context_t
* ctx
);
2093 oberon_expect_token(oberon_context_t
* ctx
, int token
)
2095 if(ctx
-> token
!= token
)
2097 oberon_error(ctx
, "unexpected token %i (%i)", ctx
-> token
, token
);
2102 oberon_assert_token(oberon_context_t
* ctx
, int token
)
2104 oberon_expect_token(ctx
, token
);
2105 oberon_read_token(ctx
);
2109 oberon_assert_ident(oberon_context_t
* ctx
)
2111 oberon_expect_token(ctx
, IDENT
);
2112 char * ident
= ctx
-> string
;
2113 oberon_read_token(ctx
);
2118 oberon_def(oberon_context_t
* ctx
, int * export
, int * read_only
)
2120 switch(ctx
-> token
)
2123 oberon_assert_token(ctx
, STAR
);
2128 oberon_assert_token(ctx
, MINUS
);
2139 static oberon_object_t
*
2140 oberon_ident_def(oberon_context_t
* ctx
, int class, bool check_upscope
)
2145 oberon_object_t
* x
;
2147 name
= oberon_assert_ident(ctx
);
2148 oberon_def(ctx
, &export
, &read_only
);
2150 x
= oberon_define_object(ctx
-> decl
, name
, class, export
, read_only
, check_upscope
);
2155 oberon_ident_list(oberon_context_t
* ctx
, int class, bool check_upscope
, int * num
, oberon_object_t
** list
)
2158 *list
= oberon_ident_def(ctx
, class, check_upscope
);
2159 while(ctx
-> token
== COMMA
)
2161 oberon_assert_token(ctx
, COMMA
);
2162 oberon_ident_def(ctx
, class, check_upscope
);
2168 oberon_var_decl(oberon_context_t
* ctx
)
2171 oberon_object_t
* list
;
2172 oberon_type_t
* type
;
2173 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2175 oberon_ident_list(ctx
, OBERON_CLASS_VAR
, false, &num
, &list
);
2176 oberon_assert_token(ctx
, COLON
);
2177 oberon_type(ctx
, &type
);
2179 oberon_object_t
* var
= list
;
2180 for(int i
= 0; i
< num
; i
++)
2187 static oberon_object_t
*
2188 oberon_fp_section(oberon_context_t
* ctx
, int * num_decl
)
2190 int class = OBERON_CLASS_PARAM
;
2191 if(ctx
-> token
== VAR
)
2193 oberon_read_token(ctx
);
2194 class = OBERON_CLASS_VAR_PARAM
;
2198 oberon_object_t
* list
;
2199 oberon_ident_list(ctx
, class, false, &num
, &list
);
2201 oberon_assert_token(ctx
, COLON
);
2203 oberon_type_t
* type
;
2204 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2205 oberon_type(ctx
, &type
);
2207 oberon_object_t
* param
= list
;
2208 for(int i
= 0; i
< num
; i
++)
2210 param
-> type
= type
;
2211 param
= param
-> next
;
2218 #define ISFPSECTION \
2219 ((ctx -> token == VAR) || (ctx -> token == IDENT))
2222 oberon_formal_pars(oberon_context_t
* ctx
, oberon_type_t
* signature
)
2224 oberon_assert_token(ctx
, LPAREN
);
2228 signature
-> decl
= oberon_fp_section(ctx
, &signature
-> num_decl
);
2229 while(ctx
-> token
== SEMICOLON
)
2231 oberon_assert_token(ctx
, SEMICOLON
);
2232 oberon_fp_section(ctx
, &signature
-> num_decl
);
2236 oberon_assert_token(ctx
, RPAREN
);
2238 if(ctx
-> token
== COLON
)
2240 oberon_assert_token(ctx
, COLON
);
2242 oberon_object_t
* typeobj
;
2243 typeobj
= oberon_qualident(ctx
, NULL
, 1);
2244 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2246 oberon_error(ctx
, "function result is not type");
2248 if(typeobj
-> type
-> class == OBERON_TYPE_RECORD
2249 || typeobj
-> type
-> class == OBERON_TYPE_ARRAY
)
2251 oberon_error(ctx
, "records or arrays could not be result of function");
2253 signature
-> base
= typeobj
-> type
;
2258 oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
)
2260 oberon_type_t
* signature
;
2262 signature
-> class = OBERON_TYPE_PROCEDURE
;
2263 signature
-> num_decl
= 0;
2264 signature
-> base
= ctx
-> notype_type
;
2265 signature
-> decl
= NULL
;
2267 if(ctx
-> token
== LPAREN
)
2269 oberon_formal_pars(ctx
, signature
);
2274 oberon_compare_signatures(oberon_context_t
* ctx
, oberon_type_t
* a
, oberon_type_t
* b
)
2276 if(a
-> num_decl
!= b
-> num_decl
)
2278 oberon_error(ctx
, "number parameters not matched");
2281 int num_param
= a
-> num_decl
;
2282 oberon_object_t
* param_a
= a
-> decl
;
2283 oberon_object_t
* param_b
= b
-> decl
;
2284 for(int i
= 0; i
< num_param
; i
++)
2286 if(strcmp(param_a
-> name
, param_b
-> name
) != 0)
2288 oberon_error(ctx
, "param %i name not matched", i
+ 1);
2291 if(param_a
-> type
!= param_b
-> type
)
2293 oberon_error(ctx
, "param %i type not matched", i
+ 1);
2296 param_a
= param_a
-> next
;
2297 param_b
= param_b
-> next
;
2302 oberon_make_return(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2304 oberon_object_t
* proc
= ctx
-> decl
-> parent
;
2305 oberon_type_t
* result_type
= proc
-> type
-> base
;
2307 if(result_type
-> class == OBERON_TYPE_NOTYPE
)
2311 oberon_error(ctx
, "procedure has no result type");
2318 oberon_error(ctx
, "procedure requires expression on result");
2321 oberon_check_src(ctx
, expr
);
2322 oberon_check_assignment_compatible(ctx
, expr
, result_type
);
2323 expr
= oberon_cast_expr(ctx
, expr
, result_type
);
2326 proc
-> has_return
= 1;
2328 oberon_generate_return(ctx
, expr
);
2332 oberon_proc_decl_body(oberon_context_t
* ctx
, oberon_object_t
* proc
)
2334 oberon_assert_token(ctx
, SEMICOLON
);
2336 ctx
-> decl
= proc
-> scope
;
2338 oberon_decl_seq(ctx
);
2340 oberon_generate_begin_proc(ctx
, proc
);
2342 if(ctx
-> token
== BEGIN
)
2344 oberon_assert_token(ctx
, BEGIN
);
2345 oberon_statement_seq(ctx
);
2348 oberon_assert_token(ctx
, END
);
2349 char * name
= oberon_assert_ident(ctx
);
2350 if(strcmp(name
, proc
-> name
) != 0)
2352 oberon_error(ctx
, "procedure name not matched");
2355 if(proc
-> type
-> base
-> class == OBERON_TYPE_NOTYPE
2356 && proc
-> has_return
== 0)
2358 oberon_make_return(ctx
, NULL
);
2361 if(proc
-> has_return
== 0)
2363 oberon_error(ctx
, "procedure requires return");
2366 oberon_generate_end_proc(ctx
);
2367 oberon_close_scope(ctx
-> decl
);
2371 oberon_proc_decl(oberon_context_t
* ctx
)
2373 oberon_assert_token(ctx
, PROCEDURE
);
2376 if(ctx
-> token
== UPARROW
)
2378 oberon_assert_token(ctx
, UPARROW
);
2385 name
= oberon_assert_ident(ctx
);
2386 oberon_def(ctx
, &export
, &read_only
);
2388 oberon_scope_t
* proc_scope
;
2389 proc_scope
= oberon_open_scope(ctx
);
2390 ctx
-> decl
-> local
= 1;
2392 oberon_type_t
* signature
;
2393 signature
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2394 oberon_opt_formal_pars(ctx
, &signature
);
2396 //oberon_initialize_decl(ctx);
2397 oberon_generator_init_type(ctx
, signature
);
2398 oberon_close_scope(ctx
-> decl
);
2400 oberon_object_t
* proc
;
2401 proc
= oberon_find_object(ctx
-> decl
, name
, 0);
2404 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, export
, read_only
, false);
2405 proc
-> type
= signature
;
2406 proc
-> scope
= proc_scope
;
2407 oberon_generator_init_proc(ctx
, proc
);
2411 if(proc
-> class != OBERON_CLASS_PROC
)
2413 oberon_error(ctx
, "mult definition");
2420 oberon_error(ctx
, "mult procedure definition");
2424 if(proc
-> export
!= export
|| proc
-> read_only
!= read_only
)
2426 oberon_error(ctx
, "export type not matched");
2429 oberon_compare_signatures(ctx
, proc
-> type
, signature
);
2432 proc_scope
-> parent
= proc
;
2433 oberon_object_t
* param
= proc_scope
-> list
-> next
;
2436 param
-> parent
= proc
;
2437 param
= param
-> next
;
2443 oberon_proc_decl_body(ctx
, proc
);
2448 oberon_const_decl(oberon_context_t
* ctx
)
2450 oberon_item_t
* value
;
2451 oberon_object_t
* constant
;
2453 constant
= oberon_ident_def(ctx
, OBERON_CLASS_CONST
, false);
2454 oberon_assert_token(ctx
, EQUAL
);
2455 value
= oberon_const_expr(ctx
);
2456 constant
-> value
= value
;
2460 oberon_make_array_type(oberon_context_t
* ctx
, oberon_expr_t
* size
, oberon_type_t
* base
, oberon_type_t
** type
)
2462 if(size
-> is_item
== 0)
2464 oberon_error(ctx
, "requires constant");
2467 if(size
-> item
.mode
!= MODE_INTEGER
)
2469 oberon_error(ctx
, "requires integer constant");
2472 oberon_type_t
* arr
;
2474 arr
-> class = OBERON_TYPE_ARRAY
;
2475 arr
-> size
= size
-> item
.integer
;
2480 oberon_qualident_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2483 oberon_object_t
* to
;
2485 to
= oberon_qualident(ctx
, &name
, 0);
2487 //name = oberon_assert_ident(ctx);
2488 //to = oberon_find_object(ctx -> decl, name, 0);
2492 if(to
-> class != OBERON_CLASS_TYPE
)
2494 oberon_error(ctx
, "not a type");
2499 to
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, false, false, false);
2500 to
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2506 static void oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
);
2509 * Правило граматики "type". Указатель type должен указывать на существующий объект!
2513 oberon_make_multiarray(oberon_context_t
* ctx
, oberon_expr_t
* sizes
, oberon_type_t
* base
, oberon_type_t
** type
)
2521 oberon_type_t
* dim
;
2522 dim
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2524 oberon_make_multiarray(ctx
, sizes
-> next
, base
, &dim
);
2526 oberon_make_array_type(ctx
, sizes
, dim
, type
);
2530 oberon_make_open_array(oberon_context_t
* ctx
, oberon_type_t
* base
, oberon_type_t
* type
)
2532 type
-> class = OBERON_TYPE_ARRAY
;
2534 type
-> base
= base
;
2538 oberon_field_list(oberon_context_t
* ctx
, oberon_type_t
* rec
, oberon_scope_t
* modscope
)
2540 if(ctx
-> token
== IDENT
)
2543 oberon_object_t
* list
;
2544 oberon_type_t
* type
;
2545 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2547 oberon_ident_list(ctx
, OBERON_CLASS_FIELD
, true, &num
, &list
);
2548 oberon_assert_token(ctx
, COLON
);
2550 oberon_scope_t
* current
= ctx
-> decl
;
2551 ctx
-> decl
= modscope
;
2552 oberon_type(ctx
, &type
);
2553 ctx
-> decl
= current
;
2555 oberon_object_t
* field
= list
;
2556 for(int i
= 0; i
< num
; i
++)
2558 field
-> type
= type
;
2559 field
= field
-> next
;
2562 rec
-> num_decl
+= num
;
2567 oberon_type_record_body(oberon_context_t
* ctx
, oberon_type_t
* rec
)
2569 oberon_scope_t
* modscope
= ctx
-> mod
-> decl
;
2570 oberon_scope_t
* oldscope
= ctx
-> decl
;
2571 ctx
-> decl
= modscope
;
2573 if(ctx
-> token
== LPAREN
)
2575 oberon_assert_token(ctx
, LPAREN
);
2577 oberon_object_t
* typeobj
;
2578 typeobj
= oberon_qualident(ctx
, NULL
, true);
2580 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2582 oberon_error(ctx
, "base must be type");
2585 oberon_type_t
* base
= typeobj
-> type
;
2586 if(base
-> class == OBERON_TYPE_POINTER
)
2588 base
= base
-> base
;
2591 if(base
-> class != OBERON_TYPE_RECORD
)
2593 oberon_error(ctx
, "base must be record type");
2597 ctx
-> decl
= base
-> scope
;
2599 oberon_assert_token(ctx
, RPAREN
);
2606 oberon_scope_t
* this_scope
;
2607 this_scope
= oberon_open_scope(ctx
);
2608 this_scope
-> local
= true;
2609 this_scope
-> parent
= NULL
;
2610 this_scope
-> parent_type
= rec
;
2612 oberon_field_list(ctx
, rec
, modscope
);
2613 while(ctx
-> token
== SEMICOLON
)
2615 oberon_assert_token(ctx
, SEMICOLON
);
2616 oberon_field_list(ctx
, rec
, modscope
);
2619 rec
-> scope
= this_scope
;
2620 rec
-> decl
= this_scope
-> list
-> next
;
2621 ctx
-> decl
= oldscope
;
2625 oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2627 if(ctx
-> token
== IDENT
)
2629 oberon_qualident_type(ctx
, type
);
2631 else if(ctx
-> token
== ARRAY
)
2633 oberon_assert_token(ctx
, ARRAY
);
2636 oberon_expr_t
* sizes
;
2638 if(ISEXPR(ctx
-> token
))
2640 oberon_expr_list(ctx
, &num_sizes
, &sizes
, 1);
2643 oberon_assert_token(ctx
, OF
);
2645 oberon_type_t
* base
;
2646 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2647 oberon_type(ctx
, &base
);
2651 oberon_make_open_array(ctx
, base
, *type
);
2655 oberon_make_multiarray(ctx
, sizes
, base
, type
);
2658 else if(ctx
-> token
== RECORD
)
2660 oberon_type_t
* rec
;
2662 rec
-> class = OBERON_TYPE_RECORD
;
2663 rec
-> module
= ctx
-> mod
;
2665 oberon_assert_token(ctx
, RECORD
);
2666 oberon_type_record_body(ctx
, rec
);
2667 oberon_assert_token(ctx
, END
);
2671 else if(ctx
-> token
== POINTER
)
2673 oberon_assert_token(ctx
, POINTER
);
2674 oberon_assert_token(ctx
, TO
);
2676 oberon_type_t
* base
;
2677 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2678 oberon_type(ctx
, &base
);
2680 oberon_type_t
* ptr
;
2682 ptr
-> class = OBERON_TYPE_POINTER
;
2685 else if(ctx
-> token
== PROCEDURE
)
2687 oberon_open_scope(ctx
);
2688 oberon_assert_token(ctx
, PROCEDURE
);
2689 oberon_opt_formal_pars(ctx
, type
);
2690 oberon_close_scope(ctx
-> decl
);
2694 oberon_error(ctx
, "invalid type declaration");
2699 oberon_type_decl(oberon_context_t
* ctx
)
2702 oberon_object_t
* newtype
;
2703 oberon_type_t
* type
;
2707 name
= oberon_assert_ident(ctx
);
2708 oberon_def(ctx
, &export
, &read_only
);
2710 newtype
= oberon_find_object(ctx
-> decl
, name
, 0);
2713 newtype
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, export
, read_only
, false);
2714 newtype
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2715 assert(newtype
-> type
);
2719 if(newtype
-> class != OBERON_CLASS_TYPE
)
2721 oberon_error(ctx
, "mult definition");
2724 if(newtype
-> linked
)
2726 oberon_error(ctx
, "mult definition - already linked");
2729 newtype
-> export
= export
;
2730 newtype
-> read_only
= read_only
;
2733 oberon_assert_token(ctx
, EQUAL
);
2735 type
= newtype
-> type
;
2736 oberon_type(ctx
, &type
);
2738 if(type
-> class == OBERON_TYPE_NOTYPE
)
2740 oberon_error(ctx
, "recursive alias declaration");
2743 newtype
-> type
= type
;
2744 newtype
-> linked
= 1;
2747 static void oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2748 static void oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2751 oberon_prevent_recursive_pointer(oberon_context_t
* ctx
, oberon_type_t
* type
)
2753 if(type
-> class != OBERON_TYPE_POINTER
2754 && type
-> class != OBERON_TYPE_ARRAY
)
2759 if(type
-> recursive
)
2761 oberon_error(ctx
, "recursive pointer declaration");
2764 if(type
-> class == OBERON_TYPE_POINTER
2765 && type
-> base
-> class == OBERON_TYPE_POINTER
)
2767 oberon_error(ctx
, "attempt to make pointer to pointer");
2770 type
-> recursive
= 1;
2772 oberon_prevent_recursive_pointer(ctx
, type
-> base
);
2774 type
-> recursive
= 0;
2778 oberon_prevent_recursive_record(oberon_context_t
* ctx
, oberon_type_t
* type
)
2780 if(type
-> class != OBERON_TYPE_RECORD
)
2785 if(type
-> recursive
)
2787 oberon_error(ctx
, "recursive record declaration");
2790 type
-> recursive
= 1;
2794 oberon_prevent_recursive_record(ctx
, type
-> base
);
2797 int num_fields
= type
-> num_decl
;
2798 oberon_object_t
* field
= type
-> decl
;
2799 for(int i
= 0; i
< num_fields
; i
++)
2801 oberon_prevent_recursive_object(ctx
, field
);
2802 field
= field
-> next
;
2805 type
-> recursive
= 0;
2808 oberon_prevent_recursive_procedure(oberon_context_t
* ctx
, oberon_type_t
* type
)
2810 if(type
-> class != OBERON_TYPE_PROCEDURE
)
2815 if(type
-> recursive
)
2817 oberon_error(ctx
, "recursive procedure declaration");
2820 type
-> recursive
= 1;
2822 int num_fields
= type
-> num_decl
;
2823 oberon_object_t
* field
= type
-> decl
;
2824 for(int i
= 0; i
< num_fields
; i
++)
2826 oberon_prevent_recursive_object(ctx
, field
);
2827 field
= field
-> next
;
2830 type
-> recursive
= 0;
2834 oberon_prevent_recursive_array(oberon_context_t
* ctx
, oberon_type_t
* type
)
2836 if(type
-> class != OBERON_TYPE_ARRAY
)
2841 if(type
-> recursive
)
2843 oberon_error(ctx
, "recursive array declaration");
2846 type
-> recursive
= 1;
2848 oberon_prevent_recursive_type(ctx
, type
-> base
);
2850 type
-> recursive
= 0;
2854 oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2856 if(type
-> class == OBERON_TYPE_POINTER
)
2858 oberon_prevent_recursive_pointer(ctx
, type
);
2860 else if(type
-> class == OBERON_TYPE_RECORD
)
2862 oberon_prevent_recursive_record(ctx
, type
);
2864 else if(type
-> class == OBERON_TYPE_ARRAY
)
2866 oberon_prevent_recursive_array(ctx
, type
);
2868 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2870 oberon_prevent_recursive_procedure(ctx
, type
);
2875 oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2879 case OBERON_CLASS_VAR
:
2880 case OBERON_CLASS_TYPE
:
2881 case OBERON_CLASS_PARAM
:
2882 case OBERON_CLASS_VAR_PARAM
:
2883 case OBERON_CLASS_FIELD
:
2884 oberon_prevent_recursive_type(ctx
, x
-> type
);
2886 case OBERON_CLASS_CONST
:
2887 case OBERON_CLASS_PROC
:
2888 case OBERON_CLASS_MODULE
:
2891 oberon_error(ctx
, "oberon_prevent_recursive_object: wat");
2897 oberon_prevent_recursive_decl(oberon_context_t
* ctx
)
2899 oberon_object_t
* x
= ctx
-> decl
-> list
-> next
;
2903 oberon_prevent_recursive_object(ctx
, x
);
2908 static void oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2909 static void oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2912 oberon_initialize_record_fields(oberon_context_t
* ctx
, oberon_type_t
* type
)
2914 if(type
-> class != OBERON_TYPE_RECORD
)
2919 int num_fields
= type
-> num_decl
;
2920 oberon_object_t
* field
= type
-> decl
;
2921 for(int i
= 0; i
< num_fields
; i
++)
2923 if(field
-> type
-> class == OBERON_TYPE_POINTER
)
2925 oberon_initialize_type(ctx
, field
-> type
);
2928 oberon_initialize_object(ctx
, field
);
2929 field
= field
-> next
;
2932 oberon_generator_init_record(ctx
, type
);
2936 oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2938 if(type
-> class == OBERON_TYPE_NOTYPE
)
2940 oberon_error(ctx
, "undeclarated type");
2943 if(type
-> initialized
)
2948 type
-> initialized
= 1;
2950 if(type
-> class == OBERON_TYPE_POINTER
)
2952 oberon_initialize_type(ctx
, type
-> base
);
2953 oberon_generator_init_type(ctx
, type
);
2955 else if(type
-> class == OBERON_TYPE_ARRAY
)
2957 if(type
-> size
!= 0)
2959 if(type
-> base
-> class == OBERON_TYPE_ARRAY
)
2961 if(type
-> base
-> size
== 0)
2963 oberon_error(ctx
, "open array not allowed as array element");
2968 oberon_initialize_type(ctx
, type
-> base
);
2969 oberon_generator_init_type(ctx
, type
);
2971 else if(type
-> class == OBERON_TYPE_RECORD
)
2973 oberon_generator_init_type(ctx
, type
);
2974 oberon_initialize_record_fields(ctx
, type
);
2976 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2978 int num_fields
= type
-> num_decl
;
2979 oberon_object_t
* field
= type
-> decl
;
2980 for(int i
= 0; i
< num_fields
; i
++)
2982 //oberon_initialize_object(ctx, field);
2983 oberon_initialize_type(ctx
, field
-> type
);
2984 field
= field
-> next
;
2987 oberon_generator_init_type(ctx
, type
);
2991 oberon_generator_init_type(ctx
, type
);
2996 oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2998 if(x
-> initialized
)
3003 x
-> initialized
= 1;
3007 case OBERON_CLASS_TYPE
:
3008 oberon_initialize_type(ctx
, x
-> type
);
3010 case OBERON_CLASS_VAR
:
3011 case OBERON_CLASS_FIELD
:
3012 if(x
-> type
-> class == OBERON_TYPE_ARRAY
)
3014 if(x
-> type
-> size
== 0)
3016 oberon_error(ctx
, "open array not allowed as variable or field");
3019 oberon_initialize_type(ctx
, x
-> type
);
3020 oberon_generator_init_var(ctx
, x
);
3022 case OBERON_CLASS_PARAM
:
3023 case OBERON_CLASS_VAR_PARAM
:
3024 oberon_initialize_type(ctx
, x
-> type
);
3025 oberon_generator_init_var(ctx
, x
);
3027 case OBERON_CLASS_CONST
:
3028 case OBERON_CLASS_PROC
:
3029 case OBERON_CLASS_MODULE
:
3032 oberon_error(ctx
, "oberon_initialize_object: wat");
3038 oberon_initialize_decl(oberon_context_t
* ctx
)
3040 oberon_object_t
* x
= ctx
-> decl
-> list
;
3044 oberon_initialize_object(ctx
, x
-> next
);
3050 oberon_prevent_undeclarated_procedures(oberon_context_t
* ctx
)
3052 oberon_object_t
* x
= ctx
-> decl
-> list
;
3056 if(x
-> next
-> class == OBERON_CLASS_PROC
)
3058 if(x
-> next
-> linked
== 0)
3060 oberon_error(ctx
, "unresolved forward declaration");
3068 oberon_decl_seq(oberon_context_t
* ctx
)
3070 if(ctx
-> token
== CONST
)
3072 oberon_assert_token(ctx
, CONST
);
3073 while(ctx
-> token
== IDENT
)
3075 oberon_const_decl(ctx
);
3076 oberon_assert_token(ctx
, SEMICOLON
);
3080 if(ctx
-> token
== TYPE
)
3082 oberon_assert_token(ctx
, TYPE
);
3083 while(ctx
-> token
== IDENT
)
3085 oberon_type_decl(ctx
);
3086 oberon_assert_token(ctx
, SEMICOLON
);
3090 if(ctx
-> token
== VAR
)
3092 oberon_assert_token(ctx
, VAR
);
3093 while(ctx
-> token
== IDENT
)
3095 oberon_var_decl(ctx
);
3096 oberon_assert_token(ctx
, SEMICOLON
);
3100 oberon_prevent_recursive_decl(ctx
);
3101 oberon_initialize_decl(ctx
);
3103 while(ctx
-> token
== PROCEDURE
)
3105 oberon_proc_decl(ctx
);
3106 oberon_assert_token(ctx
, SEMICOLON
);
3109 oberon_prevent_undeclarated_procedures(ctx
);
3112 static oberon_expr_t
*
3113 oberon_make_temp_var_item(oberon_context_t
* ctx
, oberon_type_t
* type
)
3115 oberon_object_t
* x
;
3116 oberon_expr_t
* expr
;
3118 x
= oberon_create_object(ctx
-> decl
, "TEMP", OBERON_CLASS_VAR
, false, false);
3121 oberon_generator_init_temp_var(ctx
, x
);
3123 expr
= oberon_new_item(MODE_VAR
, type
, false);
3124 expr
-> item
.var
= x
;
3129 oberon_statement_seq(oberon_context_t
* ctx
);
3132 oberon_assign(oberon_context_t
* ctx
, oberon_expr_t
* src
, oberon_expr_t
* dst
)
3134 oberon_check_dst(ctx
, dst
);
3135 oberon_check_assignment_compatible(ctx
, src
, dst
-> result
);
3137 if(oberon_is_array_of_char_type(dst
-> result
)
3138 && oberon_is_string_type(src
-> result
))
3141 oberon_make_copy_call(ctx
, 2, src
);
3145 src
= oberon_cast_expr(ctx
, src
, dst
-> result
);
3146 oberon_generate_assign(ctx
, src
, dst
);
3150 static oberon_expr_t
*
3151 oberon_case_labels(oberon_context_t
* ctx
, oberon_expr_t
* val
)
3155 oberon_expr_t
* cond
;
3156 oberon_expr_t
* cond2
;
3158 e1
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3161 if(ctx
-> token
== DOTDOT
)
3163 oberon_assert_token(ctx
, DOTDOT
);
3164 e2
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3170 cond
= oberon_make_bin_op(ctx
, EQUAL
, val
, e1
);
3174 /* val >= e1 && val <= e2 */
3175 cond
= oberon_make_bin_op(ctx
, GEQ
, val
, e1
);
3176 cond2
= oberon_make_bin_op(ctx
, LEQ
, val
, e2
);
3177 cond
= oberon_make_bin_op(ctx
, AND
, cond
, cond2
);
3184 oberon_case(oberon_context_t
* ctx
, oberon_expr_t
* val
, gen_label_t
* end
)
3186 oberon_expr_t
* cond
;
3187 oberon_expr_t
* cond2
;
3188 gen_label_t
* this_end
;
3190 if(ISEXPR(ctx
-> token
))
3192 this_end
= oberon_generator_reserve_label(ctx
);
3194 cond
= oberon_case_labels(ctx
, val
);
3195 while(ctx
-> token
== COMMA
)
3197 oberon_assert_token(ctx
, COMMA
);
3199 cond2
= oberon_case_labels(ctx
, val
);
3200 cond
= oberon_make_bin_op(ctx
, OR
, cond
, cond2
);
3202 oberon_assert_token(ctx
, COLON
);
3204 oberon_generate_branch(ctx
, cond
, false, this_end
);
3205 oberon_statement_seq(ctx
);
3206 oberon_generate_goto(ctx
, end
);
3208 oberon_generate_label(ctx
, this_end
);
3213 oberon_case_statement(oberon_context_t
* ctx
)
3215 oberon_expr_t
* val
;
3216 oberon_expr_t
* expr
;
3219 end
= oberon_generator_reserve_label(ctx
);
3221 oberon_assert_token(ctx
, CASE
);
3222 expr
= oberon_expr(ctx
);
3223 val
= oberon_make_temp_var_item(ctx
, expr
-> result
);
3224 oberon_assign(ctx
, expr
, val
);
3225 oberon_assert_token(ctx
, OF
);
3226 oberon_case(ctx
, val
, end
);
3227 while(ctx
-> token
== BAR
)
3229 oberon_assert_token(ctx
, BAR
);
3230 oberon_case(ctx
, val
, end
);
3233 if(ctx
-> token
== ELSE
)
3235 oberon_assert_token(ctx
, ELSE
);
3236 oberon_statement_seq(ctx
);
3240 oberon_generate_trap(ctx
, -1);
3243 oberon_generate_label(ctx
, end
);
3244 oberon_assert_token(ctx
, END
);
3248 oberon_with_guard_do(oberon_context_t
* ctx
, gen_label_t
* end
)
3250 oberon_expr_t
* val
;
3251 oberon_expr_t
* var
;
3252 oberon_expr_t
* type
;
3253 oberon_expr_t
* cond
;
3254 oberon_expr_t
* cast
;
3255 oberon_type_t
* old_type
;
3256 gen_var_t
* old_var
;
3257 gen_label_t
* this_end
;
3259 this_end
= oberon_generator_reserve_label(ctx
);
3261 var
= oberon_qualident_expr(ctx
);
3262 oberon_assert_token(ctx
, COLON
);
3263 type
= oberon_qualident_expr(ctx
);
3264 cond
= oberon_make_bin_op(ctx
, IS
, var
, type
);
3266 oberon_assert_token(ctx
, DO
);
3267 oberon_generate_branch(ctx
, cond
, false, this_end
);
3269 /* Сохраняем ссылку во временной переменной */
3270 val
= oberon_make_temp_var_item(ctx
, type
-> result
);
3271 //cast = oberno_make_record_cast(ctx, var, type -> result);
3272 cast
= oberon_cast_expr(ctx
, var
, type
-> result
);
3273 oberon_assign(ctx
, cast
, val
);
3274 /* Подменяем тип у оригинальной переменной */
3275 old_type
= var
-> item
.var
-> type
;
3276 var
-> item
.var
-> type
= type
-> result
;
3277 /* Подменяем ссылку на переменную */
3278 old_var
= var
-> item
.var
-> gen_var
;
3279 var
-> item
.var
-> gen_var
= val
-> item
.var
-> gen_var
;
3281 oberon_statement_seq(ctx
);
3282 oberon_generate_goto(ctx
, end
);
3283 oberon_generate_label(ctx
, this_end
);
3285 /* Возвращаем исходное состояние */
3286 var
-> item
.var
-> gen_var
= old_var
;
3287 var
-> item
.var
-> type
= old_type
;
3291 oberon_with_statement(oberon_context_t
* ctx
)
3294 end
= oberon_generator_reserve_label(ctx
);
3296 oberon_assert_token(ctx
, WITH
);
3297 oberon_with_guard_do(ctx
, end
);
3298 while(ctx
-> token
== BAR
)
3300 oberon_assert_token(ctx
, BAR
);
3301 oberon_with_guard_do(ctx
, end
);
3304 if(ctx
-> token
== ELSE
)
3306 oberon_assert_token(ctx
, ELSE
);
3307 oberon_statement_seq(ctx
);
3311 oberon_generate_trap(ctx
, -2);
3314 oberon_generate_label(ctx
, end
);
3315 oberon_assert_token(ctx
, END
);
3319 oberon_statement(oberon_context_t
* ctx
)
3321 oberon_expr_t
* item1
;
3322 oberon_expr_t
* item2
;
3324 if(ctx
-> token
== IDENT
)
3326 item1
= oberon_designator(ctx
);
3327 if(ctx
-> token
== ASSIGN
)
3329 oberon_assert_token(ctx
, ASSIGN
);
3330 item2
= oberon_expr(ctx
);
3331 oberon_assign(ctx
, item2
, item1
);
3335 oberon_opt_proc_parens(ctx
, item1
);
3338 else if(ctx
-> token
== IF
)
3342 oberon_expr_t
* cond
;
3344 els
= oberon_generator_reserve_label(ctx
);
3345 end
= oberon_generator_reserve_label(ctx
);
3347 oberon_assert_token(ctx
, IF
);
3348 cond
= oberon_expr(ctx
);
3349 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3351 oberon_error(ctx
, "condition must be boolean");
3353 oberon_assert_token(ctx
, THEN
);
3354 oberon_generate_branch(ctx
, cond
, false, els
);
3355 oberon_statement_seq(ctx
);
3356 oberon_generate_goto(ctx
, end
);
3357 oberon_generate_label(ctx
, els
);
3359 while(ctx
-> token
== ELSIF
)
3361 els
= oberon_generator_reserve_label(ctx
);
3363 oberon_assert_token(ctx
, ELSIF
);
3364 cond
= oberon_expr(ctx
);
3365 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3367 oberon_error(ctx
, "condition must be boolean");
3369 oberon_assert_token(ctx
, THEN
);
3370 oberon_generate_branch(ctx
, cond
, false, els
);
3371 oberon_statement_seq(ctx
);
3372 oberon_generate_goto(ctx
, end
);
3373 oberon_generate_label(ctx
, els
);
3376 if(ctx
-> token
== ELSE
)
3378 oberon_assert_token(ctx
, ELSE
);
3379 oberon_statement_seq(ctx
);
3382 oberon_generate_label(ctx
, end
);
3383 oberon_assert_token(ctx
, END
);
3385 else if(ctx
-> token
== WHILE
)
3387 gen_label_t
* begin
;
3389 oberon_expr_t
* cond
;
3391 begin
= oberon_generator_reserve_label(ctx
);
3392 end
= oberon_generator_reserve_label(ctx
);
3394 oberon_assert_token(ctx
, WHILE
);
3395 oberon_generate_label(ctx
, begin
);
3396 cond
= oberon_expr(ctx
);
3397 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3399 oberon_error(ctx
, "condition must be boolean");
3401 oberon_generate_branch(ctx
, cond
, false, end
);
3403 oberon_assert_token(ctx
, DO
);
3404 oberon_statement_seq(ctx
);
3405 oberon_generate_goto(ctx
, begin
);
3407 oberon_assert_token(ctx
, END
);
3408 oberon_generate_label(ctx
, end
);
3410 else if(ctx
-> token
== REPEAT
)
3412 gen_label_t
* begin
;
3413 oberon_expr_t
* cond
;
3415 begin
= oberon_generator_reserve_label(ctx
);
3416 oberon_generate_label(ctx
, begin
);
3417 oberon_assert_token(ctx
, REPEAT
);
3419 oberon_statement_seq(ctx
);
3421 oberon_assert_token(ctx
, UNTIL
);
3423 cond
= oberon_expr(ctx
);
3424 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3426 oberon_error(ctx
, "condition must be boolean");
3429 oberon_generate_branch(ctx
, cond
, true, begin
);
3431 else if(ctx
-> token
== FOR
)
3433 oberon_expr_t
* from
;
3434 oberon_expr_t
* index
;
3436 oberon_expr_t
* bound
;
3438 oberon_expr_t
* cond
;
3439 oberon_expr_t
* count
;
3440 gen_label_t
* begin
;
3445 begin
= oberon_generator_reserve_label(ctx
);
3446 end
= oberon_generator_reserve_label(ctx
);
3448 oberon_assert_token(ctx
, FOR
);
3449 iname
= oberon_assert_ident(ctx
);
3450 index
= oberon_ident_item(ctx
, iname
);
3451 oberon_assert_token(ctx
, ASSIGN
);
3452 from
= oberon_expr(ctx
);
3453 oberon_assert_token(ctx
, TO
);
3454 bound
= oberon_make_temp_var_item(ctx
, index
-> result
);
3455 to
= oberon_expr(ctx
);
3456 oberon_assign(ctx
, to
, bound
); // сначала temp
3457 oberon_assign(ctx
, from
, index
); // потом i
3458 if(ctx
-> token
== BY
)
3460 oberon_assert_token(ctx
, BY
);
3461 by
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3465 by
= oberon_make_integer(ctx
, 1);
3468 if(by
-> result
-> class != OBERON_TYPE_INTEGER
)
3470 oberon_error(ctx
, "must be integer");
3473 if(by
-> item
.integer
> 0)
3477 else if(by
-> item
.integer
< 0)
3483 oberon_error(ctx
, "zero step not allowed");
3486 oberon_assert_token(ctx
, DO
);
3487 oberon_generate_label(ctx
, begin
);
3488 cond
= oberon_make_bin_op(ctx
, op
, index
, bound
);
3489 oberon_generate_branch(ctx
, cond
, false, end
);
3490 oberon_statement_seq(ctx
);
3491 count
= oberon_make_bin_op(ctx
, PLUS
, index
, by
);
3492 oberon_assign(ctx
, count
, index
);
3493 oberon_generate_goto(ctx
, begin
);
3494 oberon_generate_label(ctx
, end
);
3495 oberon_assert_token(ctx
, END
);
3497 else if(ctx
-> token
== LOOP
)
3499 gen_label_t
* begin
;
3502 begin
= oberon_generator_reserve_label(ctx
);
3503 end
= oberon_generator_reserve_label(ctx
);
3505 oberon_open_scope(ctx
);
3506 oberon_assert_token(ctx
, LOOP
);
3507 oberon_generate_label(ctx
, begin
);
3508 ctx
-> decl
-> exit_label
= end
;
3509 oberon_statement_seq(ctx
);
3510 oberon_generate_goto(ctx
, begin
);
3511 oberon_generate_label(ctx
, end
);
3512 oberon_assert_token(ctx
, END
);
3513 oberon_close_scope(ctx
-> decl
);
3515 else if(ctx
-> token
== EXIT
)
3517 oberon_assert_token(ctx
, EXIT
);
3518 if(ctx
-> decl
-> exit_label
== NULL
)
3520 oberon_error(ctx
, "not in LOOP-END");
3522 oberon_generate_goto(ctx
, ctx
-> decl
-> exit_label
);
3524 else if(ctx
-> token
== CASE
)
3526 oberon_case_statement(ctx
);
3528 else if(ctx
-> token
== WITH
)
3530 oberon_with_statement(ctx
);
3532 else if(ctx
-> token
== RETURN
)
3534 oberon_assert_token(ctx
, RETURN
);
3535 if(ISEXPR(ctx
-> token
))
3537 oberon_expr_t
* expr
;
3538 expr
= oberon_expr(ctx
);
3539 oberon_make_return(ctx
, expr
);
3543 oberon_make_return(ctx
, NULL
);
3549 oberon_statement_seq(oberon_context_t
* ctx
)
3551 oberon_statement(ctx
);
3552 while(ctx
-> token
== SEMICOLON
)
3554 oberon_assert_token(ctx
, SEMICOLON
);
3555 oberon_statement(ctx
);
3560 oberon_import_module(oberon_context_t
* ctx
, char * alias
, char * name
)
3562 oberon_module_t
* m
= ctx
-> module_list
;
3563 while(m
&& strcmp(m
-> name
, name
) != 0)
3571 code
= ctx
-> import_module(name
);
3574 oberon_error(ctx
, "no such module");
3577 m
= oberon_compile_module(ctx
, code
);
3583 oberon_error(ctx
, "cyclic module import");
3586 oberon_object_t
* ident
;
3587 ident
= oberon_define_object(ctx
-> decl
, alias
, OBERON_CLASS_MODULE
, false, false, false);
3588 ident
-> module
= m
;
3592 oberon_import_decl(oberon_context_t
* ctx
)
3597 alias
= name
= oberon_assert_ident(ctx
);
3598 if(ctx
-> token
== ASSIGN
)
3600 oberon_assert_token(ctx
, ASSIGN
);
3601 name
= oberon_assert_ident(ctx
);
3604 oberon_import_module(ctx
, alias
, name
);
3608 oberon_import_list(oberon_context_t
* ctx
)
3610 oberon_assert_token(ctx
, IMPORT
);
3612 oberon_import_decl(ctx
);
3613 while(ctx
-> token
== COMMA
)
3615 oberon_assert_token(ctx
, COMMA
);
3616 oberon_import_decl(ctx
);
3619 oberon_assert_token(ctx
, SEMICOLON
);
3623 oberon_parse_module(oberon_context_t
* ctx
)
3627 oberon_read_token(ctx
);
3629 oberon_assert_token(ctx
, MODULE
);
3630 name1
= oberon_assert_ident(ctx
);
3631 oberon_assert_token(ctx
, SEMICOLON
);
3632 ctx
-> mod
-> name
= name1
;
3634 oberon_generator_init_module(ctx
, ctx
-> mod
);
3636 if(ctx
-> token
== IMPORT
)
3638 oberon_import_list(ctx
);
3641 oberon_decl_seq(ctx
);
3643 oberon_generate_begin_module(ctx
);
3644 if(ctx
-> token
== BEGIN
)
3646 oberon_assert_token(ctx
, BEGIN
);
3647 oberon_statement_seq(ctx
);
3649 oberon_generate_end_module(ctx
);
3651 oberon_assert_token(ctx
, END
);
3652 name2
= oberon_assert_ident(ctx
);
3653 oberon_expect_token(ctx
, DOT
);
3655 if(strcmp(name1
, name2
) != 0)
3657 oberon_error(ctx
, "module name not matched");
3660 oberon_generator_fini_module(ctx
-> mod
);
3663 // =======================================================================
3665 // =======================================================================
3667 static oberon_expr_t
*
3668 oberon_make_min_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3672 oberon_error(ctx
, "too few arguments");
3677 oberon_error(ctx
, "too mach arguments");
3680 oberon_expr_t
* arg
;
3683 if(!oberon_is_type_expr(arg
))
3685 oberon_error(ctx
, "MIN accept only type");
3688 oberon_expr_t
* expr
;
3689 int bits
= arg
-> result
-> size
* 8;
3690 switch(arg
-> result
-> class)
3692 case OBERON_TYPE_INTEGER
:
3693 expr
= oberon_make_integer(ctx
, -powl(2, bits
- 1));
3695 case OBERON_TYPE_BOOLEAN
:
3696 expr
= oberon_make_boolean(ctx
, false);
3698 case OBERON_TYPE_CHAR
:
3699 expr
= oberon_make_char(ctx
, 0);
3701 case OBERON_TYPE_REAL
:
3702 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (-FLT_MAX
) : (-DBL_MAX
), arg
-> result
);
3704 case OBERON_TYPE_SET
:
3705 expr
= oberon_make_integer(ctx
, 0);
3708 oberon_error(ctx
, "allowed only basic types");
3715 static oberon_expr_t
*
3716 oberon_make_max_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3720 oberon_error(ctx
, "too few arguments");
3725 oberon_error(ctx
, "too mach arguments");
3728 oberon_expr_t
* arg
;
3731 if(!oberon_is_type_expr(arg
))
3733 oberon_error(ctx
, "MAX accept only type");
3736 oberon_expr_t
* expr
;
3737 int bits
= arg
-> result
-> size
* 8;
3738 switch(arg
-> result
-> class)
3740 case OBERON_TYPE_INTEGER
:
3741 expr
= oberon_make_integer(ctx
, powl(2, bits
- 1) - 1);
3743 case OBERON_TYPE_BOOLEAN
:
3744 expr
= oberon_make_boolean(ctx
, true);
3746 case OBERON_TYPE_CHAR
:
3747 expr
= oberon_make_char(ctx
, powl(2, bits
) - 1);
3749 case OBERON_TYPE_REAL
:
3750 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (FLT_MAX
) : (DBL_MAX
), arg
-> result
);
3752 case OBERON_TYPE_SET
:
3753 expr
= oberon_make_integer(ctx
, bits
);
3756 oberon_error(ctx
, "allowed only basic types");
3763 static oberon_expr_t
*
3764 oberon_make_size_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3768 oberon_error(ctx
, "too few arguments");
3773 oberon_error(ctx
, "too mach arguments");
3776 oberon_expr_t
* arg
;
3778 if(!oberon_is_type_expr(arg
))
3780 oberon_error(ctx
, "SIZE accept only type");
3784 oberon_expr_t
* expr
;
3785 oberon_type_t
* type
= arg
-> result
;
3786 switch(type
-> class)
3788 case OBERON_TYPE_INTEGER
:
3789 case OBERON_TYPE_BOOLEAN
:
3790 case OBERON_TYPE_REAL
:
3791 case OBERON_TYPE_CHAR
:
3792 case OBERON_TYPE_SET
:
3793 size
= type
-> size
;
3796 oberon_error(ctx
, "TODO SIZE");
3800 expr
= oberon_make_integer(ctx
, size
);
3804 static oberon_expr_t
*
3805 oberon_make_abs_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3809 oberon_error(ctx
, "too few arguments");
3814 oberon_error(ctx
, "too mach arguments");
3817 oberon_expr_t
* arg
;
3819 oberon_check_src(ctx
, arg
);
3821 if(oberon_is_number_type(arg
-> result
))
3823 oberon_error(ctx
, "ABS accepts only numbers");
3826 oberon_expr_t
* expr
;
3827 if(oberon_is_const(arg
))
3829 if(oberon_is_real_type(arg
-> result
))
3831 double x
= arg
-> item
.real
;
3832 expr
= oberon_make_real(ctx
, fabsl(x
), arg
-> result
);
3836 int64_t x
= arg
-> item
.integer
;
3837 expr
= oberon_make_integer(ctx
, llabs(x
));
3842 expr
= oberon_new_operator(OP_ABS
, arg
-> result
, arg
, NULL
);
3848 oberon_make_inc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3852 oberon_error(ctx
, "too few arguments");
3857 oberon_error(ctx
, "too mach arguments");
3860 oberon_expr_t
* dst
;
3862 oberon_check_dst(ctx
, dst
);
3864 if(!oberon_is_integer_type(dst
-> result
))
3866 oberon_error(ctx
, "expect integer");
3869 oberon_expr_t
* expr
;
3870 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_make_integer(ctx
, 1));
3871 oberon_assign(ctx
, expr
, dst
);
3875 oberon_make_incl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3879 oberon_error(ctx
, "too few arguments");
3884 oberon_error(ctx
, "too mach arguments");
3887 oberon_expr_t
* dst
;
3889 oberon_check_dst(ctx
, dst
);
3891 if(!oberon_is_set_type(dst
-> result
))
3893 oberon_error(ctx
, "expect integer");
3897 x
= list_args
-> next
;
3898 oberon_check_src(ctx
, x
);
3900 if(!oberon_is_integer_type(x
-> result
))
3902 oberon_error(ctx
, "expect integer");
3905 oberon_expr_t
* expr
;
3906 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
3907 oberon_assign(ctx
, expr
, dst
);
3911 oberon_make_excl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3915 oberon_error(ctx
, "too few arguments");
3920 oberon_error(ctx
, "too mach arguments");
3923 oberon_expr_t
* dst
;
3925 oberon_check_dst(ctx
, dst
);
3927 if(!oberon_is_set_type(dst
-> result
))
3929 oberon_error(ctx
, "expect integer");
3933 x
= list_args
-> next
;
3934 oberon_check_src(ctx
, x
);
3936 if(!oberon_is_integer_type(x
-> result
))
3938 oberon_error(ctx
, "expect integer");
3941 oberon_expr_t
* expr
;
3942 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
3943 oberon_assign(ctx
, expr
, dst
);
3947 oberon_make_dec_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3951 oberon_error(ctx
, "too few arguments");
3956 oberon_error(ctx
, "too mach arguments");
3959 oberon_expr_t
* dst
;
3961 oberon_check_dst(ctx
, dst
);
3963 if(!oberon_is_integer_type(dst
-> result
))
3965 oberon_error(ctx
, "expect integer");
3968 oberon_expr_t
* expr
;
3969 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_make_integer(ctx
, 1));
3970 oberon_assign(ctx
, expr
, dst
);
3974 oberon_make_new_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3978 oberon_error(ctx
, "too few arguments");
3981 oberon_expr_t
* dst
;
3983 oberon_check_dst(ctx
, dst
);
3985 oberon_type_t
* type
;
3986 type
= dst
-> result
;
3988 if(type
-> class != OBERON_TYPE_POINTER
)
3990 oberon_error(ctx
, "not a pointer");
3993 type
= type
-> base
;
3995 oberon_expr_t
* src
;
3996 src
= oberon_new_item(MODE_NEW
, dst
-> result
, 0);
3997 src
-> item
.num_args
= 0;
3998 src
-> item
.args
= NULL
;
4001 if(type
-> class == OBERON_TYPE_ARRAY
)
4003 if(type
-> size
== 0)
4005 oberon_type_t
* x
= type
;
4006 while(x
-> class == OBERON_TYPE_ARRAY
)
4016 if(num_args
< max_args
)
4018 oberon_error(ctx
, "too few arguments");
4021 if(num_args
> max_args
)
4023 oberon_error(ctx
, "too mach arguments");
4026 int num_sizes
= max_args
- 1;
4027 oberon_expr_t
* size_list
= list_args
-> next
;
4029 oberon_expr_t
* arg
= size_list
;
4030 for(int i
= 0; i
< max_args
- 1; i
++)
4032 oberon_check_src(ctx
, arg
);
4033 if(arg
-> result
-> class != OBERON_TYPE_INTEGER
)
4035 oberon_error(ctx
, "size must be integer");
4040 src
-> item
.num_args
= num_sizes
;
4041 src
-> item
.args
= size_list
;
4043 else if(type
-> class != OBERON_TYPE_RECORD
)
4045 oberon_error(ctx
, "oberon_make_new_call: wat");
4048 if(num_args
> max_args
)
4050 oberon_error(ctx
, "too mach arguments");
4053 oberon_assign(ctx
, src
, dst
);
4057 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4061 oberon_error(ctx
, "too few arguments");
4066 oberon_error(ctx
, "too mach arguments");
4069 oberon_expr_t
* src
;
4071 oberon_check_src(ctx
, src
);
4073 oberon_expr_t
* dst
;
4074 dst
= list_args
-> next
;
4075 oberon_check_dst(ctx
, dst
);
4077 if(!oberon_is_string_type(src
-> result
) && !oberon_is_array_of_char_type(src
-> result
))
4079 oberon_error(ctx
, "source must be string or array of char");
4082 if(!oberon_is_array_of_char_type(dst
-> result
))
4084 oberon_error(ctx
, "dst must be array of char");
4087 oberon_generate_copy(ctx
, src
, dst
);
4091 oberon_make_assert_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4095 oberon_error(ctx
, "too few arguments");
4100 oberon_error(ctx
, "too mach arguments");
4103 oberon_expr_t
* cond
;
4105 oberon_check_src(ctx
, cond
);
4107 if(!oberon_is_boolean_type(cond
-> result
))
4109 oberon_error(ctx
, "expected boolean");
4114 oberon_generate_assert(ctx
, cond
);
4118 oberon_expr_t
* num
;
4119 num
= list_args
-> next
;
4120 oberon_check_src(ctx
, num
);
4122 if(!oberon_is_integer_type(num
-> result
))
4124 oberon_error(ctx
, "expected integer");
4127 oberon_check_const(ctx
, num
);
4129 oberon_generate_assert_n(ctx
, cond
, num
-> item
.integer
);
4134 oberon_make_halt_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4138 oberon_error(ctx
, "too few arguments");
4143 oberon_error(ctx
, "too mach arguments");
4146 oberon_expr_t
* num
;
4148 oberon_check_src(ctx
, num
);
4150 if(num
-> result
-> class != OBERON_TYPE_INTEGER
)
4152 oberon_error(ctx
, "expected integer");
4155 oberon_check_const(ctx
, num
);
4157 oberon_generate_halt(ctx
, num
-> item
.integer
);
4160 static oberon_expr_t
*
4161 oberon_make_ash_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4165 oberon_error(ctx
, "too few arguments");
4170 oberon_error(ctx
, "too mach arguments");
4173 oberon_expr_t
* arg1
;
4175 oberon_check_src(ctx
, arg1
);
4176 if(arg1
-> result
-> class != OBERON_TYPE_INTEGER
)
4178 oberon_error(ctx
, "expected integer");
4181 oberon_expr_t
* arg2
;
4182 arg2
= list_args
-> next
;
4183 oberon_check_src(ctx
, arg2
);
4184 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4186 oberon_error(ctx
, "expected integer");
4189 oberon_expr_t
* expr
;
4190 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4192 int64_t x
= arg1
-> item
.integer
;
4193 int64_t y
= arg2
-> item
.integer
;
4194 int64_t v
= (y
> 0) ? (x
<< y
) : (x
>> labs(y
));
4195 expr
= oberon_make_integer(ctx
, v
);
4199 expr
= oberon_new_operator(OP_ASH
, arg1
-> result
, arg1
, arg2
);
4205 static oberon_expr_t
*
4206 oberon_make_lsh_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4210 oberon_error(ctx
, "too few arguments");
4215 oberon_error(ctx
, "too mach arguments");
4218 oberon_expr_t
* arg1
;
4220 oberon_check_src(ctx
, arg1
);
4222 oberon_type_t
* t
= arg1
-> result
;
4223 if(!oberon_is_integer_type(t
)
4224 && !oberon_is_char_type(t
)
4225 && !oberon_is_system_byte_type(t
))
4227 oberon_error(ctx
, "expected integer, char, or SYSTEM.BYTE");
4230 oberon_expr_t
* arg2
;
4231 arg2
= list_args
-> next
;
4232 oberon_check_src(ctx
, arg2
);
4233 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4235 oberon_error(ctx
, "expected integer");
4238 oberon_expr_t
* expr
;
4239 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4241 uint64_t x
= arg1
-> item
.integer
;
4242 int64_t y
= arg2
-> item
.integer
;
4243 uint64_t v
= (y
> 0) ? (x
<< y
) : (x
>> labs(y
));
4245 if(oberon_is_integer_type(t
))
4247 expr
= oberon_make_integer(ctx
, v
);
4249 else if(oberon_is_char_type(t
))
4251 expr
= oberon_make_char(ctx
, v
);
4255 expr
= oberon_make_system_byte(ctx
, v
);
4260 expr
= oberon_new_operator(OP_LSH
, arg1
-> result
, arg1
, arg2
);
4261 expr
= oberon_cast_expr(ctx
, expr
, t
);
4267 static oberon_expr_t
*
4268 oberon_make_rot_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4272 oberon_error(ctx
, "too few arguments");
4277 oberon_error(ctx
, "too mach arguments");
4280 oberon_expr_t
* arg1
;
4282 oberon_check_src(ctx
, arg1
);
4284 oberon_type_t
* t
= arg1
-> result
;
4285 if(!oberon_is_integer_type(t
)
4286 && !oberon_is_char_type(t
)
4287 && !oberon_is_system_byte_type(t
))
4289 oberon_error(ctx
, "expected integer, char, or SYSTEM.BYTE");
4292 oberon_expr_t
* arg2
;
4293 arg2
= list_args
-> next
;
4294 oberon_check_src(ctx
, arg2
);
4295 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4297 oberon_error(ctx
, "expected integer");
4300 oberon_expr_t
* expr
;
4301 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4303 uint64_t x
= arg1
-> item
.integer
;
4304 int64_t y
= arg2
-> item
.integer
;
4309 v
= (x
<< y
) | (x
>> (64 - y
));
4314 v
= (x
>> y
) | (x
<< (64 - y
));
4317 if(oberon_is_integer_type(t
))
4319 expr
= oberon_make_integer(ctx
, v
);
4321 else if(oberon_is_char_type(t
))
4323 expr
= oberon_make_char(ctx
, v
);
4327 expr
= oberon_make_system_byte(ctx
, v
);
4332 expr
= oberon_new_operator(OP_ROT
, arg1
-> result
, arg1
, arg2
);
4333 expr
= oberon_cast_expr(ctx
, expr
, t
);
4339 static oberon_expr_t
*
4340 oberon_make_cap_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4344 oberon_error(ctx
, "too few arguments");
4349 oberon_error(ctx
, "too mach arguments");
4352 oberon_expr_t
* arg
;
4354 oberon_check_src(ctx
, arg
);
4356 if(!oberon_is_char_type(arg
-> result
))
4358 oberon_error(ctx
, "expected char");
4361 oberon_expr_t
* expr
;
4362 if(oberon_is_const(arg
))
4364 expr
= oberon_make_char(ctx
, toupper(arg
-> item
.integer
));
4368 expr
= oberon_new_operator(OP_CAP
, arg
-> result
, arg
, NULL
);
4374 static oberon_expr_t
*
4375 oberon_make_chr_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4379 oberon_error(ctx
, "too few arguments");
4384 oberon_error(ctx
, "too mach arguments");
4387 oberon_expr_t
* arg
;
4389 oberon_check_src(ctx
, arg
);
4391 if(!oberon_is_integer_type(arg
-> result
))
4393 oberon_error(ctx
, "expected integer");
4396 oberon_expr_t
* expr
;
4397 if(oberon_is_const(arg
))
4399 expr
= oberon_make_char(ctx
, arg
-> item
.integer
);
4403 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> char_type
);
4408 static oberon_expr_t
*
4409 oberon_make_ord_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4413 oberon_error(ctx
, "too few arguments");
4418 oberon_error(ctx
, "too mach arguments");
4421 oberon_expr_t
* arg
;
4423 oberon_check_src(ctx
, arg
);
4425 if(!oberon_is_char_type(arg
-> result
) && !oberon_is_string_of_one(arg
))
4427 oberon_error(ctx
, "expected char");
4430 oberon_expr_t
* expr
;
4431 if(oberon_is_const(arg
))
4433 expr
= oberon_make_integer(ctx
, arg
-> item
.integer
);
4437 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> int_type
);
4442 static oberon_expr_t
*
4443 oberon_make_entier_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4447 oberon_error(ctx
, "too few arguments");
4452 oberon_error(ctx
, "too mach arguments");
4455 oberon_expr_t
* arg
;
4457 oberon_check_src(ctx
, arg
);
4459 if(!oberon_is_real_type(arg
-> result
))
4461 oberon_error(ctx
, "expected real");
4464 oberon_expr_t
* expr
;
4465 if(oberon_is_const(arg
))
4467 expr
= oberon_make_integer(ctx
, floor(arg
-> item
.real
));
4471 expr
= oberon_new_operator(OP_ENTIER
, ctx
-> int_type
, arg
, NULL
);
4476 static oberon_expr_t
*
4477 oberon_make_odd_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4481 oberon_error(ctx
, "too few arguments");
4486 oberon_error(ctx
, "too mach arguments");
4489 oberon_expr_t
* arg
;
4491 oberon_check_src(ctx
, arg
);
4493 if(!oberon_is_integer_type(arg
-> result
))
4495 oberon_error(ctx
, "expected integer");
4498 oberon_expr_t
* expr
;
4499 expr
= oberon_make_bin_op(ctx
, MOD
, arg
, oberon_make_integer(ctx
, 2));
4500 expr
= oberon_make_bin_op(ctx
, EQUAL
, expr
, oberon_make_integer(ctx
, 1));
4504 static oberon_expr_t
*
4505 oberon_make_cc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4509 oberon_error(ctx
, "too few arguments");
4514 oberon_error(ctx
, "too mach arguments");
4517 oberon_expr_t
* arg
;
4519 oberon_check_src(ctx
, arg
);
4520 oberon_check_const(ctx
, arg
);
4522 if(!oberon_is_integer_type(arg
-> result
))
4524 oberon_error(ctx
, "expected integer");
4527 /* n >= 0 && n <= 15 */
4529 oberon_expr_t
* cond1
;
4530 oberon_expr_t
* cond2
;
4531 cond1
= oberon_make_bin_op(ctx
, GEQ
, arg
, oberon_make_integer(ctx
, 0));
4532 cond2
= oberon_make_bin_op(ctx
, LEQ
, arg
, oberon_make_integer(ctx
, 15));
4533 return oberon_make_bin_op(ctx
, AND
, cond1
, cond2
);
4536 static oberon_expr_t
*
4537 oberon_make_short_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4541 oberon_error(ctx
, "too few arguments");
4546 oberon_error(ctx
, "too mach arguments");
4549 oberon_expr_t
* arg
;
4551 oberon_check_src(ctx
, arg
);
4553 if(arg
-> result
-> shorter
== NULL
)
4555 oberon_error(ctx
, "already shorter");
4558 oberon_expr_t
* expr
;
4559 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> shorter
);
4563 static oberon_expr_t
*
4564 oberon_make_long_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4568 oberon_error(ctx
, "too few arguments");
4573 oberon_error(ctx
, "too mach arguments");
4576 oberon_expr_t
* arg
;
4578 oberon_check_src(ctx
, arg
);
4580 if(arg
-> result
-> longer
== NULL
)
4582 oberon_error(ctx
, "already longer");
4585 oberon_expr_t
* expr
;
4586 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> longer
);
4590 static oberon_expr_t
*
4591 oberon_make_val_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4595 oberon_error(ctx
, "too few arguments");
4600 oberon_error(ctx
, "too mach arguments");
4603 oberon_expr_t
* typ
;
4605 if(!oberon_is_type_expr(typ
))
4607 oberon_error(ctx
, "requires type");
4610 oberon_expr_t
* arg
;
4611 arg
= list_args
-> next
;
4612 oberon_check_src(ctx
, arg
);
4614 oberon_expr_t
* expr
;
4615 expr
= oberon_hard_cast_expr(ctx
, arg
, typ
-> result
);
4619 static oberon_expr_t
*
4620 oberon_make_len_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4624 oberon_error(ctx
, "too few arguments");
4629 oberon_error(ctx
, "too mach arguments");
4634 oberon_check_src(ctx
, v
);
4636 if(!oberon_is_array_type(v
-> result
))
4638 oberon_error(ctx
, "expected array");
4644 oberon_expr_t
* num
;
4645 num
= list_args
-> next
;
4646 oberon_check_src(ctx
, num
);
4648 if(!oberon_is_integer_type(num
-> result
))
4650 oberon_error(ctx
, "expected integer");
4652 oberon_check_const(ctx
, num
);
4654 n
= num
-> item
.integer
;
4658 oberon_type_t
* arr
= v
-> result
;
4659 while(arr
-> class == OBERON_TYPE_ARRAY
)
4665 if(n
< 0 || n
> dim
)
4667 oberon_error(ctx
, "not in range 0..%i", dim
- 1);
4670 assert(v
-> is_item
);
4672 oberon_expr_t
* expr
;
4673 expr
= oberon_new_item(MODE_LEN
, ctx
-> int_type
, true);
4674 expr
-> item
.parent
= (oberon_item_t
*) v
;
4675 expr
-> item
.integer
= n
;
4680 oberon_new_const(oberon_context_t
* ctx
, char * name
, oberon_expr_t
* expr
)
4682 oberon_object_t
* constant
;
4683 constant
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_CONST
, true, false, false);
4684 oberon_check_const(ctx
, expr
);
4685 constant
-> value
= (oberon_item_t
*) expr
;
4689 register_default_types(oberon_context_t
* ctx
)
4691 ctx
-> notype_type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
4692 oberon_generator_init_type(ctx
, ctx
-> notype_type
);
4694 ctx
-> nil_type
= oberon_new_type_ptr(OBERON_TYPE_NIL
);
4695 oberon_generator_init_type(ctx
, ctx
-> nil_type
);
4697 ctx
-> string_type
= oberon_new_type_string(1);
4698 oberon_generator_init_type(ctx
, ctx
-> string_type
);
4700 ctx
-> bool_type
= oberon_new_type_boolean();
4701 oberon_generator_init_type(ctx
, ctx
-> bool_type
);
4703 ctx
-> char_type
= oberon_new_type_char(1);
4704 oberon_generator_init_type(ctx
, ctx
-> char_type
);
4706 ctx
-> byte_type
= oberon_new_type_integer(1);
4707 oberon_generator_init_type(ctx
, ctx
-> byte_type
);
4709 ctx
-> shortint_type
= oberon_new_type_integer(2);
4710 oberon_generator_init_type(ctx
, ctx
-> shortint_type
);
4712 ctx
-> int_type
= oberon_new_type_integer(4);
4713 oberon_generator_init_type(ctx
, ctx
-> int_type
);
4715 ctx
-> longint_type
= oberon_new_type_integer(8);
4716 oberon_generator_init_type(ctx
, ctx
-> longint_type
);
4718 ctx
-> real_type
= oberon_new_type_real(4);
4719 oberon_generator_init_type(ctx
, ctx
-> real_type
);
4721 ctx
-> longreal_type
= oberon_new_type_real(8);
4722 oberon_generator_init_type(ctx
, ctx
-> longreal_type
);
4724 ctx
-> set_type
= oberon_new_type_set(4);
4725 oberon_generator_init_type(ctx
, ctx
-> set_type
);
4727 ctx
-> system_byte_type
= oberon_new_type_ptr(OBERON_TYPE_SYSTEM_BYTE
);
4728 oberon_generator_init_type(ctx
, ctx
-> system_byte_type
);
4730 ctx
-> system_ptr_type
= oberon_new_type_ptr(OBERON_TYPE_SYSTEM_PTR
);
4731 oberon_generator_init_type(ctx
, ctx
-> system_ptr_type
);
4733 /* LONG / SHORT support */
4734 ctx
-> byte_type
-> shorter
= NULL
;
4735 ctx
-> byte_type
-> longer
= ctx
-> shortint_type
;
4737 ctx
-> shortint_type
-> shorter
= ctx
-> byte_type
;
4738 ctx
-> shortint_type
-> longer
= ctx
-> int_type
;
4740 ctx
-> int_type
-> shorter
= ctx
-> shortint_type
;
4741 ctx
-> int_type
-> longer
= ctx
-> longint_type
;
4743 ctx
-> longint_type
-> shorter
= ctx
-> int_type
;
4744 ctx
-> longint_type
-> longer
= NULL
;
4746 ctx
-> real_type
-> shorter
= NULL
;
4747 ctx
-> real_type
-> longer
= ctx
-> longreal_type
;
4749 ctx
-> longreal_type
-> shorter
= ctx
-> real_type
;
4750 ctx
-> longreal_type
-> longer
= NULL
;
4754 oberon_new_intrinsic(oberon_context_t
* ctx
, char * name
, GenerateFuncCallback f
, GenerateProcCallback p
)
4756 oberon_object_t
* proc
;
4757 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, true, false, false);
4758 proc
-> type
= oberon_new_type_ptr(OBERON_TYPE_PROCEDURE
);
4759 proc
-> type
-> sysproc
= true;
4760 proc
-> type
-> genfunc
= f
;
4761 proc
-> type
-> genproc
= p
;
4764 static void oberon_new_intrinsic_type(oberon_context_t
* ctx
, char * name
, oberon_type_t
* type
)
4766 oberon_object_t
* id
;
4767 id
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, true, false, false);
4772 oberon_begin_intrinsic_module(oberon_context_t
* ctx
, char * name
, oberon_module_t
** m
)
4774 oberon_scope_t
* module_scope
;
4775 module_scope
= oberon_open_scope(ctx
);
4777 oberon_module_t
* module
;
4778 module
= GC_MALLOC(sizeof *module
);
4779 memset(module
, 0, sizeof *module
);
4780 module
-> name
= name
;
4781 module
-> intrinsic
= true;
4782 module
-> decl
= module_scope
;
4783 module
-> next
= ctx
-> module_list
;
4785 ctx
-> mod
= module
;
4786 ctx
-> module_list
= module
;
4792 oberon_end_intrinsic_module(oberon_context_t
* ctx
, oberon_module_t
* m
)
4794 oberon_close_scope(m
-> decl
);
4800 oberon_create_context(ModuleImportCallback import_module
)
4802 oberon_context_t
* ctx
= GC_MALLOC(sizeof *ctx
);
4803 memset(ctx
, 0, sizeof *ctx
);
4805 oberon_scope_t
* world_scope
;
4806 world_scope
= oberon_open_scope(ctx
);
4807 ctx
-> world_scope
= world_scope
;
4809 ctx
-> import_module
= import_module
;
4811 oberon_generator_init_context(ctx
);
4814 register_default_types(ctx
);
4817 oberon_new_const(ctx
, "TRUE", oberon_make_boolean(ctx
, true));
4818 oberon_new_const(ctx
, "FALSE", oberon_make_boolean(ctx
, false));
4821 oberon_new_intrinsic_type(ctx
, "BOOLEAN", ctx
-> bool_type
);
4822 oberon_new_intrinsic_type(ctx
, "CHAR", ctx
-> char_type
);
4823 oberon_new_intrinsic_type(ctx
, "SHORTINT", ctx
-> byte_type
);
4824 oberon_new_intrinsic_type(ctx
, "INTEGER", ctx
-> shortint_type
);
4825 oberon_new_intrinsic_type(ctx
, "LONGINT", ctx
-> int_type
);
4826 oberon_new_intrinsic_type(ctx
, "HUGEINT", ctx
-> longint_type
);
4827 oberon_new_intrinsic_type(ctx
, "REAL", ctx
-> real_type
);
4828 oberon_new_intrinsic_type(ctx
, "LONGREAL", ctx
-> longreal_type
);
4829 oberon_new_intrinsic_type(ctx
, "SET", ctx
-> set_type
);
4832 oberon_new_intrinsic(ctx
, "ABS", oberon_make_abs_call
, NULL
);
4833 oberon_new_intrinsic(ctx
, "ASH", oberon_make_ash_call
, NULL
);
4834 oberon_new_intrinsic(ctx
, "CAP", oberon_make_cap_call
, NULL
);
4835 oberon_new_intrinsic(ctx
, "CHR", oberon_make_chr_call
, NULL
);
4836 oberon_new_intrinsic(ctx
, "ENTIER", oberon_make_entier_call
, NULL
);
4837 oberon_new_intrinsic(ctx
, "LEN", oberon_make_len_call
, NULL
);
4838 oberon_new_intrinsic(ctx
, "LONG", oberon_make_long_call
, NULL
);
4839 oberon_new_intrinsic(ctx
, "MAX", oberon_make_max_call
, NULL
);
4840 oberon_new_intrinsic(ctx
, "MIN", oberon_make_min_call
, NULL
);
4841 oberon_new_intrinsic(ctx
, "ODD", oberon_make_odd_call
, NULL
);
4842 oberon_new_intrinsic(ctx
, "ORD", oberon_make_ord_call
, NULL
);
4843 oberon_new_intrinsic(ctx
, "SHORT", oberon_make_short_call
, NULL
);
4844 oberon_new_intrinsic(ctx
, "SIZE", oberon_make_size_call
, NULL
);
4847 oberon_new_intrinsic(ctx
, "ASSERT", NULL
, oberon_make_assert_call
);
4848 oberon_new_intrinsic(ctx
, "COPY", NULL
, oberon_make_copy_call
);
4849 oberon_new_intrinsic(ctx
, "DEC", NULL
, oberon_make_dec_call
);
4850 oberon_new_intrinsic(ctx
, "EXCL", NULL
, oberon_make_excl_call
);
4851 oberon_new_intrinsic(ctx
, "HALT", NULL
, oberon_make_halt_call
);
4852 oberon_new_intrinsic(ctx
, "INC", NULL
, oberon_make_inc_call
);
4853 oberon_new_intrinsic(ctx
, "INCL", NULL
, oberon_make_incl_call
);
4854 oberon_new_intrinsic(ctx
, "NEW", NULL
, oberon_make_new_call
);
4857 oberon_begin_intrinsic_module(ctx
, "SYSTEM", &ctx
-> system_module
);
4860 oberon_new_intrinsic_type(ctx
, "BYTE", ctx
-> system_byte_type
);
4861 oberon_new_intrinsic_type(ctx
, "PTR", ctx
-> system_ptr_type
);
4864 oberon_new_intrinsic(ctx
, "CC", oberon_make_cc_call
, NULL
);
4865 oberon_new_intrinsic(ctx
, "LSH", oberon_make_lsh_call
, NULL
);
4866 oberon_new_intrinsic(ctx
, "ROT", oberon_make_rot_call
, NULL
);
4867 oberon_new_intrinsic(ctx
, "VAL", oberon_make_val_call
, NULL
);
4869 oberon_end_intrinsic_module(ctx
, ctx
-> system_module
);
4875 oberon_destroy_context(oberon_context_t
* ctx
)
4877 oberon_generator_destroy_context(ctx
);
4881 oberon_compile_module(oberon_context_t
* ctx
, const char * newcode
)
4883 const char * code
= ctx
-> code
;
4884 int code_index
= ctx
-> code_index
;
4886 int token
= ctx
-> token
;
4887 char * string
= ctx
-> string
;
4888 int integer
= ctx
-> integer
;
4889 int real
= ctx
-> real
;
4890 bool longmode
= ctx
-> longmode
;
4891 oberon_scope_t
* decl
= ctx
-> decl
;
4892 oberon_module_t
* mod
= ctx
-> mod
;
4894 oberon_scope_t
* module_scope
;
4895 module_scope
= oberon_open_scope(ctx
);
4897 oberon_module_t
* module
;
4898 module
= GC_MALLOC(sizeof *module
);
4899 memset(module
, 0, sizeof *module
);
4900 module
-> decl
= module_scope
;
4901 module
-> next
= ctx
-> module_list
;
4903 ctx
-> mod
= module
;
4904 ctx
-> module_list
= module
;
4906 oberon_init_scaner(ctx
, newcode
);
4907 oberon_parse_module(ctx
);
4909 module
-> ready
= 1;
4912 ctx
-> code_index
= code_index
;
4914 ctx
-> token
= token
;
4915 ctx
-> string
= string
;
4916 ctx
-> integer
= integer
;
4918 ctx
-> longmode
= longmode
;