13 #include "oberon-internals.h"
14 #include "oberon-type-compat.h"
15 #include "oberon-common.h"
16 #include "generator.h"
18 // =======================================================================
20 // =======================================================================
23 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
);
25 static oberon_type_t
*
26 oberon_new_type_ptr(int class)
28 oberon_type_t
* x
= GC_MALLOC(sizeof *x
);
29 memset(x
, 0, sizeof *x
);
34 static oberon_type_t
*
35 oberon_new_type_integer(int size
)
38 x
= oberon_new_type_ptr(OBERON_TYPE_INTEGER
);
43 static oberon_type_t
*
44 oberon_new_type_boolean()
47 x
= oberon_new_type_ptr(OBERON_TYPE_BOOLEAN
);
51 static oberon_type_t
*
52 oberon_new_type_real(int size
)
55 x
= oberon_new_type_ptr(OBERON_TYPE_REAL
);
60 static oberon_type_t
*
61 oberon_new_type_char(int size
)
64 x
= oberon_new_type_ptr(OBERON_TYPE_CHAR
);
69 static oberon_type_t
*
70 oberon_new_type_string(int size
)
73 x
= oberon_new_type_ptr(OBERON_TYPE_STRING
);
78 static oberon_type_t
*
79 oberon_new_type_set(int size
)
82 x
= oberon_new_type_ptr(OBERON_TYPE_SET
);
87 static oberon_expr_t
*
88 oberon_new_operator(int op
, oberon_type_t
* result
, oberon_expr_t
* left
, oberon_expr_t
* right
)
90 oberon_oper_t
* operator;
91 operator = GC_MALLOC(sizeof *operator);
92 memset(operator, 0, sizeof *operator);
94 operator -> is_item
= 0;
95 operator -> result
= result
;
96 operator -> read_only
= 1;
98 operator -> left
= left
;
99 operator -> right
= right
;
101 return (oberon_expr_t
*) operator;
104 static oberon_expr_t
*
105 oberon_new_item(int mode
, oberon_type_t
* result
, int read_only
)
107 oberon_item_t
* item
;
108 item
= GC_MALLOC(sizeof *item
);
109 memset(item
, 0, sizeof *item
);
112 item
-> result
= result
;
113 item
-> read_only
= read_only
;
116 return (oberon_expr_t
*)item
;
119 static oberon_type_t
*
120 oberon_get_type_of_int_value(oberon_context_t
* ctx
, int64_t i
)
122 if(i
>= -128 && i
<= 127)
124 return ctx
-> byte_type
;
126 else if(i
>= -32768 && i
<= 32767)
128 return ctx
-> shortint_type
;
130 else if(i
>= -2147483648 && i
<= 2147483647)
132 return ctx
-> int_type
;
136 return ctx
-> longint_type
;
140 static oberon_expr_t
*
141 oberon_make_integer(oberon_context_t
* ctx
, int64_t i
)
143 oberon_expr_t
* expr
;
144 oberon_type_t
* result
;
145 result
= oberon_get_type_of_int_value(ctx
, i
);
146 expr
= oberon_new_item(MODE_INTEGER
, result
, true);
147 expr
-> item
.integer
= i
;
148 expr
-> item
.real
= i
;
152 static oberon_expr_t
*
153 oberon_make_system_byte(oberon_context_t
* ctx
, int64_t i
)
155 oberon_expr_t
* expr
;
156 expr
= oberon_new_item(MODE_SYSBYTE
, ctx
-> system_byte_type
, true);
157 expr
-> item
.integer
= i
;
158 expr
-> item
.real
= i
;
162 static oberon_expr_t
*
163 oberon_make_char(oberon_context_t
* ctx
, int64_t i
)
165 oberon_expr_t
* expr
;
166 expr
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
167 expr
-> item
.integer
= i
;
168 expr
-> item
.real
= i
;
172 static oberon_expr_t
*
173 oberon_make_string(oberon_context_t
* ctx
, char * str
)
175 oberon_expr_t
* expr
;
176 expr
= oberon_new_item(MODE_STRING
, ctx
-> string_type
, true);
177 expr
-> item
.integer
= str
[0];
178 expr
-> item
.real
= str
[0];
179 expr
-> item
.string
= str
;
183 static oberon_expr_t
*
184 oberon_make_real_typed(oberon_context_t
* ctx
, double r
, oberon_type_t
* result
)
186 oberon_expr_t
* expr
;
187 expr
= oberon_new_item(MODE_REAL
, result
, true);
188 expr
-> item
.integer
= r
;
189 expr
-> item
.real
= r
;
193 static oberon_expr_t
*
194 oberon_make_real(oberon_context_t
* ctx
, double r
, bool longmode
)
196 oberon_type_t
* result
;
197 result
= (longmode
) ? (ctx
-> longreal_type
) : (ctx
-> real_type
);
198 return oberon_make_real_typed(ctx
, r
, result
);
201 static oberon_expr_t
*
202 oberon_make_boolean(oberon_context_t
* ctx
, bool cond
)
204 oberon_expr_t
* expr
;
205 expr
= oberon_new_item(MODE_BOOLEAN
, ctx
-> bool_type
, true);
206 expr
-> item
.integer
= cond
;
207 expr
-> item
.real
= cond
;
211 static oberon_expr_t
*
212 oberon_make_set(oberon_context_t
* ctx
, int64_t i
)
214 oberon_expr_t
* expr
;
215 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
216 expr
-> item
.integer
= i
;
217 expr
-> item
.real
= i
;
221 static oberon_expr_t
*
222 oberon_make_set_index(oberon_context_t
* ctx
, int64_t i
)
224 oberon_expr_t
* expr
;
225 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
226 expr
-> item
.integer
= 1 << i
;
227 expr
-> item
.real
= 1 << i
;
231 static oberon_expr_t
*
232 oberon_make_set_range(oberon_context_t
* ctx
, int64_t x
, int64_t y
)
234 oberon_expr_t
* expr
;
235 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
236 expr
-> item
.integer
= (x
<= y
) ? ((2 << y
) - (1 << x
)) : (0);
237 expr
-> item
.real
= expr
-> item
.integer
;
241 // =======================================================================
243 // =======================================================================
245 static oberon_scope_t
*
246 oberon_open_scope(oberon_context_t
* ctx
)
248 oberon_scope_t
* scope
= GC_MALLOC(sizeof *scope
);
249 memset(scope
, 0, sizeof *scope
);
251 oberon_object_t
* list
= GC_MALLOC(sizeof *list
);
252 memset(list
, 0, sizeof *list
);
255 scope
-> list
= list
;
256 scope
-> up
= ctx
-> decl
;
260 scope
-> local
= scope
-> up
-> local
;
261 scope
-> parent
= scope
-> up
-> parent
;
262 scope
-> parent_type
= scope
-> up
-> parent_type
;
263 scope
-> exit_label
= scope
-> up
-> exit_label
;
271 oberon_close_scope(oberon_scope_t
* scope
)
273 oberon_context_t
* ctx
= scope
-> ctx
;
274 ctx
-> decl
= scope
-> up
;
277 static oberon_object_t
*
278 oberon_find_object_in_list(oberon_object_t
* list
, char * name
)
280 oberon_object_t
* x
= list
;
281 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
288 static oberon_object_t
*
289 oberon_find_object(oberon_scope_t
* scope
, char * name
, bool check_it
)
291 oberon_object_t
* result
= NULL
;
293 oberon_scope_t
* s
= scope
;
294 while(result
== NULL
&& s
!= NULL
)
296 result
= oberon_find_object_in_list(s
-> list
, name
);
300 if(check_it
&& result
== NULL
)
302 oberon_error(scope
-> ctx
, "undefined ident %s", name
);
308 static oberon_object_t
*
309 oberon_find_object_in_scope(oberon_scope_t
* scope
, char * name
, bool check_it
)
311 oberon_object_t
* result
= NULL
;
313 result
= oberon_find_object_in_list(scope
-> list
, name
);
315 if(check_it
&& result
== NULL
)
317 oberon_error(scope
-> ctx
, "undefined ident %s", name
);
323 static oberon_object_t
*
324 oberon_create_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
)
326 oberon_object_t
* newvar
= GC_MALLOC(sizeof *newvar
);
327 memset(newvar
, 0, sizeof *newvar
);
328 newvar
-> name
= name
;
329 newvar
-> class = class;
330 newvar
-> export
= export
;
331 newvar
-> read_only
= read_only
;
332 newvar
-> local
= scope
-> local
;
333 newvar
-> parent
= scope
-> parent
;
334 newvar
-> parent_type
= scope
-> parent_type
;
335 newvar
-> module
= scope
-> ctx
-> mod
;
339 static oberon_object_t
*
340 oberon_define_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
, bool check_upscope
)
344 if(oberon_find_object(scope
-> up
, name
, false))
346 oberon_error(scope
-> ctx
, "already defined");
350 oberon_object_t
* x
= scope
-> list
;
351 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
358 oberon_error(scope
-> ctx
, "already defined");
361 oberon_object_t
* newvar
;
362 newvar
= oberon_create_object(scope
, name
, class, export
, read_only
);
368 // =======================================================================
370 // =======================================================================
373 oberon_get_char(oberon_context_t
* ctx
)
375 if(ctx
-> code
[ctx
-> code_index
])
377 ctx
-> code_index
+= 1;
378 ctx
-> xloc
.col
+= 1;
379 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
384 oberon_init_scaner(oberon_context_t
* ctx
, oberon_scanner_t
* s
)
386 ctx
-> code
= s
-> code
;
387 ctx
-> code_index
= 0;
388 ctx
-> xloc
.source
= s
-> source
;
389 ctx
-> xloc
.line
= 1;
391 ctx
-> loc
= ctx
-> xloc
;
392 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
393 oberon_set_line(ctx
, 1);
397 oberon_read_ident(oberon_context_t
* ctx
)
399 int start
= ctx
-> code_index
;
401 oberon_get_char(ctx
);
402 while(isalnum(ctx
-> c
) || ctx
-> c
== '_')
404 oberon_get_char(ctx
);
407 int end
= ctx
-> code_index
;
409 char * ident
= GC_MALLOC(end
- start
+ 1);
410 memcpy(ident
, &ctx
-> code
[start
], end
- start
);
411 ident
[end
- start
] = 0;
413 ctx
-> string
= ident
;
414 ctx
-> token
= IDENT
;
416 if(strcmp(ident
, "MODULE") == 0)
418 ctx
-> token
= MODULE
;
420 else if(strcmp(ident
, "END") == 0)
424 else if(strcmp(ident
, "VAR") == 0)
428 else if(strcmp(ident
, "BEGIN") == 0)
430 ctx
-> token
= BEGIN
;
432 else if(strcmp(ident
, "OR") == 0)
436 else if(strcmp(ident
, "DIV") == 0)
440 else if(strcmp(ident
, "MOD") == 0)
444 else if(strcmp(ident
, "PROCEDURE") == 0)
446 ctx
-> token
= PROCEDURE
;
448 else if(strcmp(ident
, "RETURN") == 0)
450 ctx
-> token
= RETURN
;
452 else if(strcmp(ident
, "CONST") == 0)
454 ctx
-> token
= CONST
;
456 else if(strcmp(ident
, "TYPE") == 0)
460 else if(strcmp(ident
, "ARRAY") == 0)
462 ctx
-> token
= ARRAY
;
464 else if(strcmp(ident
, "OF") == 0)
468 else if(strcmp(ident
, "RECORD") == 0)
470 ctx
-> token
= RECORD
;
472 else if(strcmp(ident
, "POINTER") == 0)
474 ctx
-> token
= POINTER
;
476 else if(strcmp(ident
, "TO") == 0)
480 else if(strcmp(ident
, "NIL") == 0)
484 else if(strcmp(ident
, "IMPORT") == 0)
486 ctx
-> token
= IMPORT
;
488 else if(strcmp(ident
, "IN") == 0)
492 else if(strcmp(ident
, "IS") == 0)
496 else if(strcmp(ident
, "IF") == 0)
500 else if(strcmp(ident
, "THEN") == 0)
504 else if(strcmp(ident
, "ELSE") == 0)
508 else if(strcmp(ident
, "ELSIF") == 0)
510 ctx
-> token
= ELSIF
;
512 else if(strcmp(ident
, "WHILE") == 0)
514 ctx
-> token
= WHILE
;
516 else if(strcmp(ident
, "DO") == 0)
520 else if(strcmp(ident
, "REPEAT") == 0)
522 ctx
-> token
= REPEAT
;
524 else if(strcmp(ident
, "UNTIL") == 0)
526 ctx
-> token
= UNTIL
;
528 else if(strcmp(ident
, "FOR") == 0)
532 else if(strcmp(ident
, "BY") == 0)
536 else if(strcmp(ident
, "LOOP") == 0)
540 else if(strcmp(ident
, "EXIT") == 0)
544 else if(strcmp(ident
, "CASE") == 0)
548 else if(strcmp(ident
, "WITH") == 0)
554 #define ISHEXDIGIT(x) \
555 (((x) >= '0' && (x) <= '9') || ((x) >= 'A' && (x) <= 'F'))
558 oberon_read_number(oberon_context_t
* ctx
)
571 * mode = 3 == LONGREAL
575 start_i
= ctx
-> code_index
;
577 while(isdigit(ctx
-> c
))
579 oberon_get_char(ctx
);
582 end_i
= ctx
-> code_index
;
584 if(ISHEXDIGIT(ctx
-> c
))
587 while(ISHEXDIGIT(ctx
-> c
))
589 oberon_get_char(ctx
);
592 end_i
= ctx
-> code_index
;
597 oberon_get_char(ctx
);
599 else if(ctx
-> c
== 'X')
602 oberon_get_char(ctx
);
606 oberon_error(ctx
, "invalid hex number");
609 else if(ctx
-> c
== '.')
611 oberon_get_char(ctx
);
614 /* Чит: избегаем конфликта с DOTDOT */
615 ctx
-> code_index
-= 1;
621 while(isdigit(ctx
-> c
))
623 oberon_get_char(ctx
);
626 if(ctx
-> c
== 'E' || ctx
-> c
== 'D')
628 exp_i
= ctx
-> code_index
;
635 oberon_get_char(ctx
);
637 if(ctx
-> c
== '+' || ctx
-> c
== '-')
639 oberon_get_char(ctx
);
642 while(isdigit(ctx
-> c
))
644 oberon_get_char(ctx
);
648 end_i
= ctx
-> code_index
;
656 oberon_get_char(ctx
);
658 else if(ctx
-> c
== 'X')
661 oberon_get_char(ctx
);
665 int len
= end_i
- start_i
;
666 ident
= GC_MALLOC(len
+ 1);
667 memcpy(ident
, &ctx
-> code
[start_i
], len
);
670 ctx
-> longmode
= false;
673 int i
= exp_i
- start_i
;
675 ctx
-> longmode
= true;
681 integer
= atol(ident
);
683 ctx
-> token
= INTEGER
;
686 sscanf(ident
, "%lx", &integer
);
688 ctx
-> token
= INTEGER
;
692 sscanf(ident
, "%lf", &real
);
697 sscanf(ident
, "%lx", &integer
);
702 oberon_error(ctx
, "oberon_read_number: wat");
706 ctx
-> string
= ident
;
707 ctx
-> integer
= integer
;
712 oberon_get_lined_char(oberon_context_t
* ctx
)
718 oberon_get_char(ctx
);
721 oberon_get_char(ctx
);
723 ctx
-> xloc
.line
+= 1;
725 oberon_set_line(ctx
, ctx
-> xloc
.line
);
727 else if(ctx
-> c
== 0xA)
729 oberon_get_char(ctx
);
730 ctx
-> xloc
.line
+= 1;
732 oberon_set_line(ctx
, ctx
-> xloc
.line
);
736 oberon_get_char(ctx
);
738 } while(ctx
-> c
== 0xD || ctx
-> c
== 0xA);
742 oberon_skip_space(oberon_context_t
* ctx
)
744 while(isspace(ctx
-> c
))
746 oberon_get_lined_char(ctx
);
751 oberon_read_comment(oberon_context_t
* ctx
)
758 oberon_get_lined_char(ctx
);
761 oberon_get_lined_char(ctx
);
765 else if(ctx
-> c
== '*')
767 oberon_get_lined_char(ctx
);
770 oberon_get_lined_char(ctx
);
774 else if(ctx
-> c
== 0)
776 oberon_error(ctx
, "unterminated comment");
780 oberon_get_lined_char(ctx
);
785 static void oberon_read_string(oberon_context_t
* ctx
)
788 oberon_get_char(ctx
);
790 int start
= ctx
-> code_index
;
792 while(ctx
-> c
!= 0 && ctx
-> c
!= c
)
794 oberon_get_char(ctx
);
799 oberon_error(ctx
, "unterminated string");
802 int end
= ctx
-> code_index
;
804 oberon_get_char(ctx
);
806 char * string
= GC_MALLOC(end
- start
+ 1);
807 strncpy(string
, &ctx
-> code
[start
], end
- start
);
808 string
[end
- start
] = 0;
810 ctx
-> token
= STRING
;
811 ctx
-> string
= string
;
812 ctx
-> integer
= string
[0];
815 static void oberon_read_token(oberon_context_t
* ctx
);
818 oberon_read_symbol(oberon_context_t
* ctx
)
827 ctx
-> token
= SEMICOLON
;
828 oberon_get_char(ctx
);
831 ctx
-> token
= COLON
;
832 oberon_get_char(ctx
);
835 ctx
-> token
= ASSIGN
;
836 oberon_get_char(ctx
);
841 oberon_get_char(ctx
);
844 ctx
-> token
= DOTDOT
;
845 oberon_get_char(ctx
);
849 ctx
-> token
= LPAREN
;
850 oberon_get_char(ctx
);
853 oberon_get_char(ctx
);
854 oberon_read_comment(ctx
);
855 oberon_read_token(ctx
);
859 ctx
-> token
= RPAREN
;
860 oberon_get_char(ctx
);
863 ctx
-> token
= EQUAL
;
864 oberon_get_char(ctx
);
868 oberon_get_char(ctx
);
872 oberon_get_char(ctx
);
876 oberon_get_char(ctx
);
880 ctx
-> token
= GREAT
;
881 oberon_get_char(ctx
);
885 oberon_get_char(ctx
);
890 oberon_get_char(ctx
);
893 ctx
-> token
= MINUS
;
894 oberon_get_char(ctx
);
898 oberon_get_char(ctx
);
901 oberon_get_char(ctx
);
902 oberon_error(ctx
, "unstarted comment");
906 ctx
-> token
= SLASH
;
907 oberon_get_char(ctx
);
911 oberon_get_char(ctx
);
915 oberon_get_char(ctx
);
918 ctx
-> token
= COMMA
;
919 oberon_get_char(ctx
);
922 ctx
-> token
= LBRACK
;
923 oberon_get_char(ctx
);
926 ctx
-> token
= RBRACK
;
927 oberon_get_char(ctx
);
930 ctx
-> token
= UPARROW
;
931 oberon_get_char(ctx
);
934 oberon_read_string(ctx
);
937 oberon_read_string(ctx
);
940 ctx
-> token
= LBRACE
;
941 oberon_get_char(ctx
);
944 ctx
-> token
= RBRACE
;
945 oberon_get_char(ctx
);
949 oberon_get_char(ctx
);
952 oberon_error(ctx
, "invalid char %c", ctx
-> c
);
958 oberon_read_token(oberon_context_t
* ctx
)
960 oberon_skip_space(ctx
);
962 ctx
-> loc
= ctx
-> xloc
;
965 if(isalpha(c
) || c
== '_')
967 oberon_read_ident(ctx
);
971 oberon_read_number(ctx
);
975 oberon_read_symbol(ctx
);
979 // =======================================================================
981 // =======================================================================
983 static void oberon_expect_token(oberon_context_t
* ctx
, int token
);
984 static oberon_expr_t
* oberon_expr(oberon_context_t
* ctx
);
985 static void oberon_assert_token(oberon_context_t
* ctx
, int token
);
986 static char * oberon_assert_ident(oberon_context_t
* ctx
);
987 static void oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
);
988 static oberon_item_t
* oberon_const_expr(oberon_context_t
* ctx
);
989 static oberon_expr_t
* oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
);
990 static bool oberon_is_const(oberon_expr_t
* expr
);
992 static oberon_expr_t
*
993 oberon_make_unary_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
)
995 oberon_expr_t
* expr
;
996 oberon_type_t
* result
;
998 result
= a
-> result
;
1002 if(result
-> class == OBERON_TYPE_SET
)
1004 if(oberon_is_const(a
))
1006 expr
= oberon_make_set(ctx
, ~(a
-> item
.integer
));
1010 expr
= oberon_new_operator(OP_COMPLEMENTATION
, result
, a
, NULL
);
1013 else if(result
-> class == OBERON_TYPE_INTEGER
)
1015 if(oberon_is_const(a
))
1017 expr
= oberon_make_integer(ctx
, -(a
-> item
.integer
));
1021 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
1024 else if(result
-> class == OBERON_TYPE_REAL
)
1026 if(oberon_is_const(a
))
1028 expr
= oberon_make_real_typed(ctx
, -(a
-> item
.real
), result
);
1032 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
1037 oberon_error(ctx
, "incompatible operator type");
1040 else if(token
== NOT
)
1042 if(result
-> class != OBERON_TYPE_BOOLEAN
)
1044 oberon_error(ctx
, "incompatible operator type");
1047 if(oberon_is_const(a
))
1049 expr
= oberon_make_boolean(ctx
, !(a
-> item
.integer
));
1053 expr
= oberon_new_operator(OP_LOGIC_NOT
, result
, a
, NULL
);
1058 oberon_error(ctx
, "oberon_make_unary_op: wat");
1065 oberon_expr_list(oberon_context_t
* ctx
, int * num_expr
, oberon_expr_t
** first
, int const_expr
)
1067 oberon_expr_t
* last
;
1072 *first
= last
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1076 *first
= last
= oberon_expr(ctx
);
1078 while(ctx
-> token
== COMMA
)
1080 oberon_assert_token(ctx
, COMMA
);
1081 oberon_expr_t
* current
;
1085 current
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1089 current
= oberon_expr(ctx
);
1092 last
-> next
= current
;
1098 static oberon_expr_t
*
1099 oberon_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1101 oberon_expr_t
* cast
;
1103 if((oberon_is_char_type(pref
) && oberon_is_const_string(expr
) && strlen(expr
-> item
.string
) == 1))
1105 /* Автоматически преобразуем строку единичного размера в символ */
1106 cast
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
1107 cast
-> item
.integer
= expr
-> item
.string
[0];
1109 else if(oberon_is_record_type(pref
) || oberon_is_pointer_to_record(pref
))
1111 assert(expr
-> is_item
);
1112 cast
= oberon_new_item(MODE_AS
, pref
, expr
-> read_only
);
1113 cast
-> item
.parent
= (oberon_item_t
*) expr
;
1115 else if(!oberon_is_some_types(expr
-> result
, pref
))
1117 cast
= oberon_new_operator(OP_CAST
, pref
, expr
, NULL
);
1127 static oberon_expr_t
*
1128 oberon_hard_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1130 return oberon_new_operator(OP_HARDCAST
, pref
, expr
, NULL
);
1134 oberon_check_dst(oberon_context_t
* ctx
, oberon_expr_t
* dst
)
1136 if(dst
-> read_only
)
1138 oberon_error(ctx
, "read-only destination");
1141 if(dst
-> is_item
== false)
1143 oberon_error(ctx
, "not variable");
1146 switch(dst
-> item
.mode
)
1157 oberon_error(ctx
, "not variable");
1163 oberon_check_src(oberon_context_t
* ctx
, oberon_expr_t
* src
)
1167 if(src
-> item
.mode
== MODE_TYPE
)
1169 oberon_error(ctx
, "not variable");
1175 oberon_autocast_call(oberon_context_t
* ctx
, oberon_item_t
* desig
)
1177 if(desig
-> mode
!= MODE_CALL
)
1179 oberon_error(ctx
, "expected mode CALL");
1182 oberon_type_t
* fn
= desig
-> parent
-> result
;
1183 int num_args
= desig
-> num_args
;
1184 int num_decl
= fn
-> num_decl
;
1186 if(num_args
< num_decl
)
1188 oberon_error(ctx
, "too few arguments");
1190 else if(num_args
> num_decl
)
1192 oberon_error(ctx
, "too many arguments");
1195 /* Делаем проверку на запись и делаем автокаст */
1196 oberon_expr_t
* casted
[num_args
];
1197 oberon_expr_t
* arg
= desig
-> args
;
1198 oberon_object_t
* param
= fn
-> decl
;
1199 for(int i
= 0; i
< num_args
; i
++)
1201 if(param
-> class == OBERON_CLASS_VAR_PARAM
)
1203 oberon_check_dst(ctx
, arg
);
1204 if(!oberon_is_compatible_arrays(param
, arg
))
1206 oberon_check_compatible_var_param(ctx
, param
-> type
, arg
-> result
);
1209 //casted[i] = oberon_cast_expr(ctx, arg, param -> type);
1213 oberon_check_src(ctx
, arg
);
1214 if(!oberon_is_compatible_arrays(param
, arg
))
1216 oberon_check_assignment_compatible(ctx
, arg
, param
-> type
);
1218 casted
[i
] = oberon_cast_expr(ctx
, arg
, param
-> type
);
1222 param
= param
-> next
;
1225 /* Создаём новый список выражений */
1229 for(int i
= 0; i
< num_args
- 1; i
++)
1231 casted
[i
] -> next
= casted
[i
+ 1];
1233 desig
-> args
= arg
;
1237 static oberon_expr_t
*
1238 oberon_make_call_func(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1240 oberon_type_t
* signature
= item
-> result
;
1241 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1243 oberon_error(ctx
, "not a procedure");
1246 oberon_expr_t
* call
;
1248 if(signature
-> sysproc
)
1250 if(signature
-> genfunc
== NULL
)
1252 oberon_error(ctx
, "not a function-procedure");
1255 call
= signature
-> genfunc(ctx
, num_args
, list_args
);
1259 if(signature
-> base
-> class == OBERON_TYPE_NOTYPE
)
1261 oberon_error(ctx
, "attempt to call procedure in expression");
1264 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1265 call
-> item
.parent
= item
;
1266 call
-> item
.num_args
= num_args
;
1267 call
-> item
.args
= list_args
;
1268 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1275 oberon_make_call_proc(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1277 oberon_type_t
* signature
= item
-> result
;
1278 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1280 oberon_error(ctx
, "not a procedure");
1283 oberon_expr_t
* call
;
1285 if(signature
-> sysproc
)
1287 if(signature
-> genproc
== NULL
)
1289 oberon_error(ctx
, "not a procedure");
1292 signature
-> genproc(ctx
, num_args
, list_args
);
1296 if(signature
-> base
-> class != OBERON_TYPE_NOTYPE
)
1298 oberon_error(ctx
, "attempt to call function as non-typed procedure");
1301 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1302 call
-> item
.parent
= item
;
1303 call
-> item
.num_args
= num_args
;
1304 call
-> item
.args
= list_args
;
1305 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1306 oberon_generate_call_proc(ctx
, call
);
1314 || ((x) == INTEGER) \
1317 || ((x) == STRING) \
1319 || ((x) == LBRACE) \
1320 || ((x) == LPAREN) \
1323 static oberon_expr_t
*
1324 oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1326 if(expr
-> result
-> class != OBERON_TYPE_POINTER
)
1328 oberon_error(ctx
, "not a pointer");
1331 assert(expr
-> is_item
);
1333 oberon_expr_t
* selector
;
1334 selector
= oberon_new_item(MODE_DEREF
, expr
-> result
-> base
, false);
1335 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1340 static oberon_expr_t
*
1341 oberon_make_array_selector(oberon_context_t
* ctx
, oberon_expr_t
* desig
, oberon_expr_t
* index
)
1343 if(desig
-> result
-> class == OBERON_TYPE_POINTER
)
1345 desig
= oberno_make_dereferencing(ctx
, desig
);
1348 assert(desig
-> is_item
);
1350 if(desig
-> result
-> class != OBERON_TYPE_ARRAY
)
1352 oberon_error(ctx
, "not array");
1355 oberon_type_t
* base
;
1356 base
= desig
-> result
-> base
;
1358 if(index
-> result
-> class != OBERON_TYPE_INTEGER
)
1360 oberon_error(ctx
, "index must be integer");
1363 // Статическая проверка границ массива
1364 if(desig
-> result
-> size
!= 0)
1366 if(index
-> is_item
)
1368 if(index
-> item
.mode
== MODE_INTEGER
)
1370 int arr_size
= desig
-> result
-> size
;
1371 int index_int
= index
-> item
.integer
;
1372 if(index_int
< 0 || index_int
> arr_size
- 1)
1374 oberon_error(ctx
, "not in range (dimension size 0..%i)", arr_size
- 1);
1380 oberon_expr_t
* selector
;
1381 selector
= oberon_new_item(MODE_INDEX
, base
, desig
-> read_only
);
1382 selector
-> item
.parent
= (oberon_item_t
*) desig
;
1383 selector
-> item
.num_args
= 1;
1384 selector
-> item
.args
= index
;
1389 static oberon_expr_t
*
1390 oberon_make_record_selector(oberon_context_t
* ctx
, oberon_expr_t
* expr
, char * name
)
1392 if(expr
-> result
-> class == OBERON_TYPE_POINTER
)
1394 expr
= oberno_make_dereferencing(ctx
, expr
);
1397 assert(expr
-> is_item
);
1399 if(expr
-> result
-> class != OBERON_TYPE_RECORD
)
1401 oberon_error(ctx
, "not record");
1404 oberon_type_t
* rec
= expr
-> result
;
1406 oberon_object_t
* field
;
1407 field
= oberon_find_object(rec
-> scope
, name
, true);
1409 if(field
-> export
== 0)
1411 if(field
-> module
!= ctx
-> mod
)
1413 oberon_error(ctx
, "field not exported");
1417 int read_only
= expr
-> read_only
;
1418 if(field
-> read_only
)
1420 if(field
-> module
!= ctx
-> mod
)
1426 oberon_expr_t
* selector
;
1427 selector
= oberon_new_item(MODE_FIELD
, field
-> type
, read_only
);
1428 selector
-> item
.var
= field
;
1429 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1434 #define ISSELECTOR(x) \
1437 || ((x) == UPARROW) \
1440 static oberon_object_t
*
1441 oberon_qualident(oberon_context_t
* ctx
, char ** xname
, int check
)
1444 oberon_object_t
* x
;
1446 name
= oberon_assert_ident(ctx
);
1447 x
= oberon_find_object(ctx
-> decl
, name
, check
);
1451 if(x
-> class == OBERON_CLASS_MODULE
)
1453 oberon_assert_token(ctx
, DOT
);
1454 name
= oberon_assert_ident(ctx
);
1455 /* Наличие объектов в левых модулях всегда проверяется */
1456 x
= oberon_find_object(x
-> module
-> decl
, name
, 1);
1458 if(x
-> export
== 0)
1460 oberon_error(ctx
, "not exported");
1473 static oberon_expr_t
*
1474 oberon_ident_item(oberon_context_t
* ctx
, char * name
)
1477 oberon_object_t
* x
;
1478 oberon_expr_t
* expr
;
1480 x
= oberon_find_object(ctx
-> decl
, name
, true);
1483 if(x
-> class == OBERON_CLASS_CONST
|| x
-> class == OBERON_CLASS_PROC
)
1488 expr
= oberon_new_item(MODE_VAR
, x
-> type
, read_only
);
1489 expr
-> item
.var
= x
;
1493 static oberon_expr_t
*
1494 oberon_qualident_expr(oberon_context_t
* ctx
)
1496 oberon_object_t
* var
;
1497 oberon_expr_t
* expr
;
1499 var
= oberon_qualident(ctx
, NULL
, 1);
1502 if(var
-> read_only
)
1504 if(var
-> module
!= ctx
-> mod
)
1510 switch(var
-> class)
1512 case OBERON_CLASS_CONST
:
1514 expr
= (oberon_expr_t
*) var
-> value
;
1516 case OBERON_CLASS_TYPE
:
1517 expr
= oberon_new_item(MODE_TYPE
, var
-> type
, read_only
);
1519 case OBERON_CLASS_VAR
:
1520 case OBERON_CLASS_VAR_PARAM
:
1521 case OBERON_CLASS_PARAM
:
1522 expr
= oberon_new_item(MODE_VAR
, var
-> type
, read_only
);
1524 case OBERON_CLASS_PROC
:
1525 expr
= oberon_new_item(MODE_VAR
, var
-> type
, true);
1528 oberon_error(ctx
, "invalid designator");
1532 expr
-> item
.var
= var
;
1537 static oberon_expr_t
*
1538 oberon_designator(oberon_context_t
* ctx
)
1541 oberon_expr_t
* expr
;
1542 oberon_object_t
* objtype
;
1544 expr
= oberon_qualident_expr(ctx
);
1546 while(expr
-> result
-> class != OBERON_TYPE_PROCEDURE
&& ISSELECTOR(ctx
-> token
))
1548 switch(ctx
-> token
)
1551 oberon_assert_token(ctx
, DOT
);
1552 name
= oberon_assert_ident(ctx
);
1553 expr
= oberon_make_record_selector(ctx
, expr
, name
);
1556 oberon_assert_token(ctx
, LBRACK
);
1557 int num_indexes
= 0;
1558 oberon_expr_t
* indexes
= NULL
;
1559 oberon_expr_list(ctx
, &num_indexes
, &indexes
, 0);
1560 oberon_assert_token(ctx
, RBRACK
);
1562 for(int i
= 0; i
< num_indexes
; i
++)
1564 expr
= oberon_make_array_selector(ctx
, expr
, indexes
);
1565 indexes
= indexes
-> next
;
1569 oberon_assert_token(ctx
, UPARROW
);
1570 expr
= oberno_make_dereferencing(ctx
, expr
);
1573 oberon_assert_token(ctx
, LPAREN
);
1574 objtype
= oberon_qualident(ctx
, NULL
, true);
1575 oberon_assert_token(ctx
, RPAREN
);
1576 oberon_check_extension_of(ctx
, expr
-> result
, objtype
-> type
);
1577 expr
= oberon_cast_expr(ctx
, expr
, objtype
-> type
);
1580 oberon_error(ctx
, "oberon_designator: wat");
1588 static oberon_expr_t
*
1589 oberon_opt_func_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1591 /* Если есть скобки - значит вызов. Если нет, то передаём указатель. */
1592 if(ctx
-> token
== LPAREN
)
1594 oberon_assert_token(ctx
, LPAREN
);
1597 oberon_expr_t
* arguments
= NULL
;
1599 if(ISEXPR(ctx
-> token
))
1601 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1604 assert(expr
-> is_item
== 1);
1605 expr
= oberon_make_call_func(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1607 oberon_assert_token(ctx
, RPAREN
);
1614 oberon_opt_proc_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1616 assert(expr
-> is_item
);
1619 oberon_expr_t
* arguments
= NULL
;
1621 if(ctx
-> token
== LPAREN
)
1623 oberon_assert_token(ctx
, LPAREN
);
1625 if(ISEXPR(ctx
-> token
))
1627 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1630 oberon_assert_token(ctx
, RPAREN
);
1633 /* Вызов происходит даже без скобок */
1634 oberon_make_call_proc(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1637 static oberon_expr_t
*
1638 oberon_element(oberon_context_t
* ctx
)
1643 e1
= oberon_expr(ctx
);
1644 oberon_check_src(ctx
, e1
);
1645 if(e1
-> result
-> class != OBERON_TYPE_INTEGER
)
1647 oberon_error(ctx
, "expected integer");
1651 if(ctx
-> token
== DOTDOT
)
1653 oberon_assert_token(ctx
, DOTDOT
);
1654 e2
= oberon_expr(ctx
);
1655 oberon_check_src(ctx
, e2
);
1656 if(e2
-> result
-> class != OBERON_TYPE_INTEGER
)
1658 oberon_error(ctx
, "expected integer");
1662 oberon_expr_t
* set
;
1663 if(e2
== NULL
&& oberon_is_const(e1
))
1665 set
= oberon_make_set_index(ctx
, e1
-> item
.integer
);
1667 else if(e2
!= NULL
&& oberon_is_const(e1
) && oberon_is_const(e2
))
1669 set
= oberon_make_set_range(ctx
, e1
-> item
.integer
, e2
-> item
.integer
);
1673 set
= oberon_new_operator(OP_RANGE
, ctx
-> set_type
, e1
, e2
);
1678 static oberon_expr_t
*
1679 oberon_make_set_union(oberon_context_t
* ctx
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1681 if(oberon_is_const(a
) && oberon_is_const(b
))
1683 return oberon_make_set(ctx
, (a
-> item
.integer
| b
-> item
.integer
));
1687 return oberon_new_operator(OP_UNION
, ctx
-> set_type
, a
, b
);
1691 static oberon_expr_t
*
1692 oberon_set(oberon_context_t
* ctx
)
1694 oberon_expr_t
* set
;
1695 oberon_expr_t
* elements
;
1696 set
= oberon_make_set(ctx
, 0);
1698 oberon_assert_token(ctx
, LBRACE
);
1699 if(ISEXPR(ctx
-> token
))
1701 elements
= oberon_element(ctx
);
1702 set
= oberon_make_set_union(ctx
, set
, elements
);
1703 while(ctx
-> token
== COMMA
)
1705 oberon_assert_token(ctx
, COMMA
);
1706 elements
= oberon_element(ctx
);
1707 set
= oberon_make_set_union(ctx
, set
, elements
);
1710 oberon_assert_token(ctx
, RBRACE
);
1715 static oberon_expr_t
*
1716 oberon_factor(oberon_context_t
* ctx
)
1718 oberon_expr_t
* expr
;
1719 oberon_type_t
* result
;
1721 switch(ctx
-> token
)
1724 expr
= oberon_designator(ctx
);
1725 expr
= oberon_opt_func_parens(ctx
, expr
);
1728 expr
= oberon_make_integer(ctx
, ctx
-> integer
);
1729 oberon_assert_token(ctx
, INTEGER
);
1732 result
= ctx
-> char_type
;
1733 expr
= oberon_new_item(MODE_CHAR
, result
, true);
1734 expr
-> item
.integer
= ctx
-> integer
;
1735 oberon_assert_token(ctx
, CHAR
);
1738 expr
= oberon_make_string(ctx
, ctx
-> string
);
1739 oberon_assert_token(ctx
, STRING
);
1742 expr
= oberon_make_real(ctx
, ctx
-> real
, ctx
-> longmode
);
1743 oberon_assert_token(ctx
, REAL
);
1746 expr
= oberon_set(ctx
);
1749 oberon_assert_token(ctx
, LPAREN
);
1750 expr
= oberon_expr(ctx
);
1751 oberon_assert_token(ctx
, RPAREN
);
1754 oberon_assert_token(ctx
, NOT
);
1755 expr
= oberon_factor(ctx
);
1756 expr
= oberon_make_unary_op(ctx
, NOT
, expr
);
1759 oberon_assert_token(ctx
, NIL
);
1760 expr
= oberon_new_item(MODE_NIL
, ctx
-> nil_type
, true);
1763 oberon_error(ctx
, "invalid expression");
1769 static oberon_expr_t
*
1770 oberon_make_bin_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1772 oberon_expr_t
* expr
;
1773 oberon_type_t
* result
;
1775 oberon_check_compatible_bin_expr(ctx
, token
, a
, b
);
1776 oberon_check_src(ctx
, a
);
1779 oberon_check_src(ctx
, b
);
1784 if(oberon_is_const(a
) && oberon_is_const(b
))
1786 expr
= oberon_make_boolean(ctx
, (1 << a
-> item
.integer
) & b
-> item
.integer
);
1790 expr
= oberon_new_operator(OP_IN
, ctx
-> bool_type
, a
, b
);
1793 else if(token
== IS
)
1795 oberon_check_type_expr(ctx
, b
);
1796 expr
= oberon_new_operator(OP_IS
, ctx
-> bool_type
, a
, b
);
1798 else if((token
>= EQUAL
&& token
<= GEQ
) || token
== OR
|| token
== AND
)
1800 if(oberon_is_string_of_one(a
) && oberon_is_char_type(b
-> result
))
1802 result
= b
-> result
;
1804 else if(oberon_is_string_of_one(b
) && oberon_is_char_type(a
-> result
))
1806 result
= a
-> result
;
1808 else if(oberon_is_string_of_one(a
) && oberon_is_string_of_one(b
))
1810 result
= ctx
-> char_type
;
1814 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1817 if(oberon_is_const(a
) && oberon_is_const(b
)
1818 && (oberon_is_real_type(result
) || oberon_is_integer_type(result
)))
1820 if(oberon_is_real_type(result
))
1822 double x
= a
-> item
.real
;
1823 double y
= b
-> item
.real
;
1826 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1827 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1828 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1829 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1830 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1831 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1832 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1833 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1834 default: assert(0); break;
1837 else if(oberon_is_integer_type(result
))
1839 int64_t x
= a
-> item
.integer
;
1840 int64_t y
= b
-> item
.integer
;
1843 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1844 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1845 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1846 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1847 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1848 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1849 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1850 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1851 default: assert(0); break;
1861 a
= oberon_cast_expr(ctx
, a
, result
);
1862 b
= oberon_cast_expr(ctx
, b
, result
);
1863 result
= ctx
-> bool_type
;
1866 case EQUAL
: expr
= oberon_new_operator(OP_EQ
, result
, a
, b
); break;
1867 case NEQ
: expr
= oberon_new_operator(OP_NEQ
, result
, a
, b
); break;
1868 case LESS
: expr
= oberon_new_operator(OP_LSS
, result
, a
, b
); break;
1869 case LEQ
: expr
= oberon_new_operator(OP_LEQ
, result
, a
, b
); break;
1870 case GREAT
: expr
= oberon_new_operator(OP_GRT
, result
, a
, b
); break;
1871 case GEQ
: expr
= oberon_new_operator(OP_GEQ
, result
, a
, b
); break;
1872 case OR
: expr
= oberon_new_operator(OP_LOGIC_OR
, result
, a
, b
); break;
1873 case AND
: expr
= oberon_new_operator(OP_LOGIC_AND
, result
, a
, b
); break;
1874 default: assert(0); break;
1878 else if(token
== SLASH
)
1880 if(oberon_is_set_type(a
-> result
) && oberon_is_set_type(b
-> result
))
1882 if(oberon_is_const(a
) && oberon_is_const(b
))
1884 int64_t x
= a
-> item
.integer
;
1885 int64_t y
= b
-> item
.integer
;
1886 expr
= oberon_make_set(ctx
, x
^ y
);
1890 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1891 a
= oberon_cast_expr(ctx
, a
, result
);
1892 b
= oberon_cast_expr(ctx
, b
, result
);
1893 expr
= oberon_new_operator(OP_SYM_DIFFERENCE
, result
, a
, b
);
1898 result
= oberon_get_longer_real_type(ctx
, a
-> result
, b
-> result
);
1899 if(oberon_is_const(a
) && oberon_is_const(b
))
1901 double x
= a
-> item
.real
;
1902 double y
= b
-> item
.real
;
1903 expr
= oberon_make_real_typed(ctx
, x
/ y
, result
);
1907 a
= oberon_cast_expr(ctx
, a
, result
);
1908 b
= oberon_cast_expr(ctx
, b
, result
);
1909 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
1915 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1917 if(oberon_is_const(a
) && oberon_is_const(b
))
1919 if(oberon_is_set_type(result
))
1921 int64_t x
= a
-> item
.integer
;
1922 int64_t y
= b
-> item
.integer
;
1925 case PLUS
: expr
= oberon_make_set(ctx
, x
| y
); break;
1926 case MINUS
: expr
= oberon_make_set(ctx
, x
& ~y
); break;
1927 case STAR
: expr
= oberon_make_set(ctx
, x
& y
); break;
1928 default: assert(0); break;
1931 if(oberon_is_real_type(result
))
1933 double x
= a
-> item
.real
;
1934 double y
= b
-> item
.real
;
1937 case PLUS
: expr
= oberon_make_real_typed(ctx
, x
+ y
, result
); break;
1938 case MINUS
: expr
= oberon_make_real_typed(ctx
, x
- y
, result
); break;
1939 case STAR
: expr
= oberon_make_real_typed(ctx
, x
* y
, result
); break;
1940 default: assert(0); break;
1943 else if(oberon_is_integer_type(result
))
1945 int64_t x
= a
-> item
.integer
;
1946 int64_t y
= b
-> item
.integer
;
1949 case PLUS
: expr
= oberon_make_integer(ctx
, x
+ y
); break;
1950 case MINUS
: expr
= oberon_make_integer(ctx
, x
- y
); break;
1951 case STAR
: expr
= oberon_make_integer(ctx
, x
* y
); break;
1952 case DIV
: expr
= oberon_make_integer(ctx
, x
/ y
); break;
1953 case MOD
: expr
= oberon_make_integer(ctx
, x
% y
); break;
1954 default: assert(0); break;
1964 a
= oberon_cast_expr(ctx
, a
, result
);
1965 b
= oberon_cast_expr(ctx
, b
, result
);
1968 if(oberon_is_set_type(result
))
1973 expr
= oberon_new_operator(OP_UNION
, result
, a
, b
);
1976 expr
= oberon_new_operator(OP_DIFFERENCE
, result
, a
, b
);
1979 expr
= oberon_new_operator(OP_INTERSECTION
, result
, a
, b
);
1986 else if(oberon_is_real_type(result
))
1991 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
1994 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
1997 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
2000 printf("token %i line %i\n", token
, ctx
-> loc
.line
);
2005 else if(oberon_is_integer_type(result
))
2010 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
2013 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
2016 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
2019 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
2022 expr
= oberon_new_operator(OP_MOD
, result
, a
, b
);
2025 printf("token %i line %i\n", token
, ctx
-> loc
.line
);
2040 #define ISMULOP(x) \
2041 ((x) >= STAR && (x) <= AND)
2043 static oberon_expr_t
*
2044 oberon_term_expr(oberon_context_t
* ctx
)
2046 oberon_expr_t
* expr
;
2048 expr
= oberon_factor(ctx
);
2049 while(ISMULOP(ctx
-> token
))
2051 int token
= ctx
-> token
;
2052 oberon_read_token(ctx
);
2054 oberon_expr_t
* inter
= oberon_factor(ctx
);
2055 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2061 #define ISADDOP(x) \
2062 ((x) >= PLUS && (x) <= OR)
2064 static oberon_expr_t
*
2065 oberon_simple_expr(oberon_context_t
* ctx
)
2067 oberon_expr_t
* expr
;
2070 if(ctx
-> token
== PLUS
)
2073 oberon_assert_token(ctx
, PLUS
);
2075 else if(ctx
-> token
== MINUS
)
2078 oberon_assert_token(ctx
, MINUS
);
2081 expr
= oberon_term_expr(ctx
);
2083 while(ISADDOP(ctx
-> token
))
2085 int token
= ctx
-> token
;
2086 oberon_read_token(ctx
);
2088 oberon_expr_t
* inter
= oberon_term_expr(ctx
);
2089 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2094 expr
= oberon_make_unary_op(ctx
, MINUS
, expr
);
2100 #define ISRELATION(x) \
2101 ((x) >= EQUAL && (x) <= IS)
2103 static oberon_expr_t
*
2104 oberon_expr(oberon_context_t
* ctx
)
2106 oberon_expr_t
* expr
;
2108 expr
= oberon_simple_expr(ctx
);
2109 while(ISRELATION(ctx
-> token
))
2111 int token
= ctx
-> token
;
2112 oberon_read_token(ctx
);
2114 oberon_expr_t
* inter
= oberon_simple_expr(ctx
);
2115 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2122 oberon_is_const(oberon_expr_t
* expr
)
2124 if(expr
-> is_item
== false)
2129 switch(expr
-> item
.mode
)
2151 oberon_check_const(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2153 if(!oberon_is_const(expr
))
2155 oberon_error(ctx
, "const expression are required");
2159 static oberon_item_t
*
2160 oberon_const_expr(oberon_context_t
* ctx
)
2162 oberon_expr_t
* expr
;
2163 expr
= oberon_expr(ctx
);
2164 oberon_check_const(ctx
, expr
);
2165 return (oberon_item_t
*) expr
;
2168 // =======================================================================
2170 // =======================================================================
2172 static void oberon_decl_seq(oberon_context_t
* ctx
);
2173 static void oberon_statement_seq(oberon_context_t
* ctx
);
2174 static void oberon_initialize_decl(oberon_context_t
* ctx
);
2177 oberon_expect_token(oberon_context_t
* ctx
, int token
)
2179 if(ctx
-> token
!= token
)
2181 oberon_error(ctx
, "unexpected token %i (%i)", ctx
-> token
, token
);
2186 oberon_assert_token(oberon_context_t
* ctx
, int token
)
2188 oberon_expect_token(ctx
, token
);
2189 oberon_read_token(ctx
);
2193 oberon_assert_ident(oberon_context_t
* ctx
)
2195 oberon_expect_token(ctx
, IDENT
);
2196 char * ident
= ctx
-> string
;
2197 oberon_read_token(ctx
);
2202 oberon_def(oberon_context_t
* ctx
, int * export
, int * read_only
)
2204 switch(ctx
-> token
)
2207 oberon_assert_token(ctx
, STAR
);
2212 oberon_assert_token(ctx
, MINUS
);
2223 static oberon_object_t
*
2224 oberon_ident_def(oberon_context_t
* ctx
, int class, bool check_upscope
)
2229 oberon_object_t
* x
;
2231 name
= oberon_assert_ident(ctx
);
2232 oberon_def(ctx
, &export
, &read_only
);
2234 x
= oberon_define_object(ctx
-> decl
, name
, class, export
, read_only
, check_upscope
);
2239 oberon_ident_list(oberon_context_t
* ctx
, int class, bool check_upscope
, int * num
, oberon_object_t
** list
)
2242 *list
= oberon_ident_def(ctx
, class, check_upscope
);
2243 while(ctx
-> token
== COMMA
)
2245 oberon_assert_token(ctx
, COMMA
);
2246 oberon_ident_def(ctx
, class, check_upscope
);
2252 oberon_var_decl(oberon_context_t
* ctx
)
2255 oberon_object_t
* list
;
2256 oberon_type_t
* type
;
2257 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2259 oberon_ident_list(ctx
, OBERON_CLASS_VAR
, false, &num
, &list
);
2260 oberon_assert_token(ctx
, COLON
);
2261 oberon_type(ctx
, &type
);
2263 oberon_object_t
* var
= list
;
2264 for(int i
= 0; i
< num
; i
++)
2271 static oberon_object_t
*
2272 oberon_fp_section(oberon_context_t
* ctx
, int * num_decl
)
2274 int class = OBERON_CLASS_PARAM
;
2275 if(ctx
-> token
== VAR
)
2277 oberon_read_token(ctx
);
2278 class = OBERON_CLASS_VAR_PARAM
;
2282 oberon_object_t
* list
;
2283 oberon_ident_list(ctx
, class, false, &num
, &list
);
2285 oberon_assert_token(ctx
, COLON
);
2287 oberon_type_t
* type
;
2288 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2289 oberon_type(ctx
, &type
);
2291 oberon_object_t
* param
= list
;
2292 for(int i
= 0; i
< num
; i
++)
2294 param
-> type
= type
;
2295 param
= param
-> next
;
2302 #define ISFPSECTION \
2303 ((ctx -> token == VAR) || (ctx -> token == IDENT))
2306 oberon_formal_pars(oberon_context_t
* ctx
, oberon_type_t
* signature
)
2308 oberon_assert_token(ctx
, LPAREN
);
2312 signature
-> decl
= oberon_fp_section(ctx
, &signature
-> num_decl
);
2313 while(ctx
-> token
== SEMICOLON
)
2315 oberon_assert_token(ctx
, SEMICOLON
);
2316 oberon_fp_section(ctx
, &signature
-> num_decl
);
2320 oberon_assert_token(ctx
, RPAREN
);
2322 if(ctx
-> token
== COLON
)
2324 oberon_assert_token(ctx
, COLON
);
2326 oberon_object_t
* typeobj
;
2327 typeobj
= oberon_qualident(ctx
, NULL
, 1);
2328 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2330 oberon_error(ctx
, "function result is not type");
2332 if(typeobj
-> type
-> class == OBERON_TYPE_RECORD
2333 || typeobj
-> type
-> class == OBERON_TYPE_ARRAY
)
2335 oberon_error(ctx
, "records or arrays could not be result of function");
2337 signature
-> base
= typeobj
-> type
;
2342 oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
)
2344 oberon_type_t
* signature
;
2346 signature
-> class = OBERON_TYPE_PROCEDURE
;
2347 signature
-> num_decl
= 0;
2348 signature
-> base
= ctx
-> notype_type
;
2349 signature
-> decl
= NULL
;
2351 if(ctx
-> token
== LPAREN
)
2353 oberon_formal_pars(ctx
, signature
);
2358 oberon_compare_signatures(oberon_context_t
* ctx
, oberon_type_t
* a
, oberon_type_t
* b
)
2360 if(a
-> num_decl
!= b
-> num_decl
)
2362 oberon_error(ctx
, "number parameters not matched");
2365 int num_param
= a
-> num_decl
;
2366 oberon_object_t
* param_a
= a
-> decl
;
2367 oberon_object_t
* param_b
= b
-> decl
;
2368 for(int i
= 0; i
< num_param
; i
++)
2370 if(strcmp(param_a
-> name
, param_b
-> name
) != 0)
2372 oberon_error(ctx
, "param %i name not matched", i
+ 1);
2375 if(param_a
-> type
!= param_b
-> type
)
2377 oberon_error(ctx
, "param %i type not matched", i
+ 1);
2380 param_a
= param_a
-> next
;
2381 param_b
= param_b
-> next
;
2386 oberon_make_return(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2388 oberon_object_t
* proc
= ctx
-> decl
-> parent
;
2389 oberon_type_t
* result_type
= proc
-> type
-> base
;
2391 if(result_type
-> class == OBERON_TYPE_NOTYPE
)
2395 oberon_error(ctx
, "procedure has no result type");
2402 oberon_error(ctx
, "procedure requires expression on result");
2405 oberon_check_src(ctx
, expr
);
2406 oberon_check_assignment_compatible(ctx
, expr
, result_type
);
2407 expr
= oberon_cast_expr(ctx
, expr
, result_type
);
2410 proc
-> has_return
= 1;
2412 oberon_generate_return(ctx
, expr
);
2416 oberon_proc_decl_body(oberon_context_t
* ctx
, oberon_object_t
* proc
)
2418 oberon_assert_token(ctx
, SEMICOLON
);
2420 ctx
-> decl
= proc
-> scope
;
2422 oberon_decl_seq(ctx
);
2424 oberon_generate_begin_proc(ctx
, proc
);
2426 if(ctx
-> token
== BEGIN
)
2428 oberon_assert_token(ctx
, BEGIN
);
2429 oberon_statement_seq(ctx
);
2432 oberon_assert_token(ctx
, END
);
2433 char * name
= oberon_assert_ident(ctx
);
2434 if(strcmp(name
, proc
-> name
) != 0)
2436 oberon_error(ctx
, "procedure name not matched");
2439 if(proc
-> type
-> base
-> class == OBERON_TYPE_NOTYPE
)
2441 oberon_make_return(ctx
, NULL
);
2444 if(proc
-> has_return
== 0)
2446 oberon_error(ctx
, "procedure requires return");
2449 oberon_generate_end_proc(ctx
);
2450 oberon_close_scope(ctx
-> decl
);
2454 oberon_proc_decl(oberon_context_t
* ctx
)
2456 oberon_assert_token(ctx
, PROCEDURE
);
2459 if(ctx
-> token
== UPARROW
)
2461 oberon_assert_token(ctx
, UPARROW
);
2469 if(ctx
-> token
== STAR
)
2471 oberon_assert_token(ctx
, STAR
);
2474 name
= oberon_assert_ident(ctx
);
2475 oberon_def(ctx
, &export
, &read_only
);
2477 oberon_scope_t
* proc_scope
;
2478 proc_scope
= oberon_open_scope(ctx
);
2479 ctx
-> decl
-> local
= 1;
2481 oberon_type_t
* signature
;
2482 signature
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2483 oberon_opt_formal_pars(ctx
, &signature
);
2485 //oberon_initialize_decl(ctx);
2486 oberon_generator_init_type(ctx
, signature
);
2487 oberon_close_scope(ctx
-> decl
);
2489 oberon_object_t
* proc
;
2490 proc
= oberon_find_object_in_scope(ctx
-> decl
, name
, 0);
2493 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, export
, read_only
, false);
2494 proc
-> type
= signature
;
2495 proc
-> scope
= proc_scope
;
2496 oberon_generator_init_proc(ctx
, proc
);
2500 if(proc
-> class != OBERON_CLASS_PROC
)
2502 oberon_error(ctx
, "mult definition");
2509 oberon_error(ctx
, "mult procedure definition");
2513 if(proc
-> export
!= export
|| proc
-> read_only
!= read_only
)
2515 oberon_error(ctx
, "export type not matched");
2518 oberon_compare_signatures(ctx
, proc
-> type
, signature
);
2521 proc_scope
-> parent
= proc
;
2522 oberon_object_t
* param
= proc_scope
-> list
-> next
;
2525 param
-> parent
= proc
;
2526 param
= param
-> next
;
2532 oberon_proc_decl_body(ctx
, proc
);
2537 oberon_const_decl(oberon_context_t
* ctx
)
2539 oberon_item_t
* value
;
2540 oberon_object_t
* constant
;
2542 constant
= oberon_ident_def(ctx
, OBERON_CLASS_CONST
, false);
2543 oberon_assert_token(ctx
, EQUAL
);
2544 value
= oberon_const_expr(ctx
);
2545 constant
-> value
= value
;
2549 oberon_make_array_type(oberon_context_t
* ctx
, oberon_expr_t
* size
, oberon_type_t
* base
, oberon_type_t
** type
)
2551 if(size
-> is_item
== 0)
2553 oberon_error(ctx
, "requires constant");
2556 if(size
-> item
.mode
!= MODE_INTEGER
)
2558 oberon_error(ctx
, "requires integer constant");
2561 oberon_type_t
* arr
;
2563 arr
-> class = OBERON_TYPE_ARRAY
;
2564 arr
-> size
= size
-> item
.integer
;
2569 oberon_qualident_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2572 oberon_object_t
* to
;
2574 to
= oberon_qualident(ctx
, &name
, 0);
2576 //name = oberon_assert_ident(ctx);
2577 //to = oberon_find_object(ctx -> decl, name, 0);
2581 if(to
-> class != OBERON_CLASS_TYPE
)
2583 oberon_error(ctx
, "not a type");
2588 to
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, false, false, false);
2589 to
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2595 static void oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
);
2598 * Правило граматики "type". Указатель type должен указывать на существующий объект!
2602 oberon_make_multiarray(oberon_context_t
* ctx
, oberon_expr_t
* sizes
, oberon_type_t
* base
, oberon_type_t
** type
)
2610 oberon_type_t
* dim
;
2611 dim
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2613 oberon_make_multiarray(ctx
, sizes
-> next
, base
, &dim
);
2615 oberon_make_array_type(ctx
, sizes
, dim
, type
);
2619 oberon_make_open_array(oberon_context_t
* ctx
, oberon_type_t
* base
, oberon_type_t
* type
)
2621 type
-> class = OBERON_TYPE_ARRAY
;
2623 type
-> base
= base
;
2627 oberon_field_list(oberon_context_t
* ctx
, oberon_type_t
* rec
, oberon_scope_t
* modscope
)
2629 if(ctx
-> token
== IDENT
)
2632 oberon_object_t
* list
;
2633 oberon_type_t
* type
;
2634 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2636 oberon_ident_list(ctx
, OBERON_CLASS_FIELD
, true, &num
, &list
);
2637 oberon_assert_token(ctx
, COLON
);
2639 oberon_scope_t
* current
= ctx
-> decl
;
2640 ctx
-> decl
= modscope
;
2641 oberon_type(ctx
, &type
);
2642 ctx
-> decl
= current
;
2644 oberon_object_t
* field
= list
;
2645 for(int i
= 0; i
< num
; i
++)
2647 field
-> type
= type
;
2648 field
= field
-> next
;
2651 rec
-> num_decl
+= num
;
2656 oberon_type_record_body(oberon_context_t
* ctx
, oberon_type_t
* rec
)
2658 oberon_scope_t
* oldscope
= ctx
-> decl
;
2659 ctx
-> decl
= oldscope
;
2661 if(ctx
-> token
== LPAREN
)
2663 oberon_assert_token(ctx
, LPAREN
);
2665 oberon_object_t
* typeobj
;
2666 typeobj
= oberon_qualident(ctx
, NULL
, true);
2668 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2670 oberon_error(ctx
, "base must be type");
2673 oberon_type_t
* base
= typeobj
-> type
;
2674 if(base
-> class == OBERON_TYPE_POINTER
)
2676 base
= base
-> base
;
2679 if(base
-> class != OBERON_TYPE_RECORD
)
2681 oberon_error(ctx
, "base must be record type");
2685 ctx
-> decl
= base
-> scope
;
2687 oberon_assert_token(ctx
, RPAREN
);
2694 oberon_scope_t
* this_scope
;
2695 this_scope
= oberon_open_scope(ctx
);
2696 this_scope
-> local
= true;
2697 this_scope
-> parent
= NULL
;
2698 this_scope
-> parent_type
= rec
;
2700 oberon_field_list(ctx
, rec
, oldscope
);
2701 while(ctx
-> token
== SEMICOLON
)
2703 oberon_assert_token(ctx
, SEMICOLON
);
2704 oberon_field_list(ctx
, rec
, oldscope
);
2707 rec
-> scope
= this_scope
;
2708 rec
-> decl
= this_scope
-> list
-> next
;
2709 ctx
-> decl
= oldscope
;
2713 oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2715 if(ctx
-> token
== IDENT
)
2717 oberon_qualident_type(ctx
, type
);
2719 else if(ctx
-> token
== ARRAY
)
2721 oberon_assert_token(ctx
, ARRAY
);
2724 oberon_expr_t
* sizes
;
2726 if(ISEXPR(ctx
-> token
))
2728 oberon_expr_list(ctx
, &num_sizes
, &sizes
, 1);
2731 oberon_assert_token(ctx
, OF
);
2733 oberon_type_t
* base
;
2734 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2735 oberon_type(ctx
, &base
);
2739 oberon_make_open_array(ctx
, base
, *type
);
2743 oberon_make_multiarray(ctx
, sizes
, base
, type
);
2746 else if(ctx
-> token
== RECORD
)
2748 oberon_type_t
* rec
;
2750 rec
-> class = OBERON_TYPE_RECORD
;
2751 rec
-> module
= ctx
-> mod
;
2753 oberon_assert_token(ctx
, RECORD
);
2754 oberon_type_record_body(ctx
, rec
);
2755 oberon_assert_token(ctx
, END
);
2759 else if(ctx
-> token
== POINTER
)
2761 oberon_assert_token(ctx
, POINTER
);
2762 oberon_assert_token(ctx
, TO
);
2764 oberon_type_t
* base
;
2765 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2766 oberon_type(ctx
, &base
);
2768 oberon_type_t
* ptr
;
2770 ptr
-> class = OBERON_TYPE_POINTER
;
2773 else if(ctx
-> token
== PROCEDURE
)
2775 oberon_open_scope(ctx
);
2776 oberon_assert_token(ctx
, PROCEDURE
);
2777 oberon_opt_formal_pars(ctx
, type
);
2778 oberon_close_scope(ctx
-> decl
);
2782 oberon_error(ctx
, "invalid type declaration");
2787 oberon_type_decl(oberon_context_t
* ctx
)
2790 oberon_object_t
* newtype
;
2791 oberon_type_t
* type
;
2795 name
= oberon_assert_ident(ctx
);
2796 oberon_def(ctx
, &export
, &read_only
);
2798 newtype
= oberon_find_object(ctx
-> decl
, name
, 0);
2801 newtype
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, export
, read_only
, false);
2802 newtype
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2803 assert(newtype
-> type
);
2807 if(newtype
-> class != OBERON_CLASS_TYPE
)
2809 oberon_error(ctx
, "mult definition");
2812 if(newtype
-> linked
)
2814 oberon_error(ctx
, "mult definition - already linked");
2817 newtype
-> export
= export
;
2818 newtype
-> read_only
= read_only
;
2821 oberon_assert_token(ctx
, EQUAL
);
2823 type
= newtype
-> type
;
2824 oberon_type(ctx
, &type
);
2826 if(type
-> class == OBERON_TYPE_NOTYPE
)
2828 oberon_error(ctx
, "recursive alias declaration");
2831 newtype
-> type
= type
;
2832 newtype
-> linked
= 1;
2835 static void oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2836 static void oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2839 oberon_prevent_recursive_pointer(oberon_context_t
* ctx
, oberon_type_t
* type
)
2841 if(type
-> class != OBERON_TYPE_POINTER
2842 && type
-> class != OBERON_TYPE_ARRAY
)
2847 if(type
-> recursive
)
2849 if(type
-> class == OBERON_TYPE_POINTER
)
2851 oberon_error(ctx
, "recursive pointer declaration");
2855 oberon_error(ctx
, "recursive array declaration (pointer)");
2859 if(type
-> class == OBERON_TYPE_POINTER
2860 && type
-> base
-> class == OBERON_TYPE_POINTER
)
2862 oberon_error(ctx
, "attempt to make pointer to pointer");
2865 type
-> recursive
= 1;
2867 oberon_prevent_recursive_pointer(ctx
, type
-> base
);
2869 type
-> recursive
= 0;
2873 oberon_prevent_recursive_record(oberon_context_t
* ctx
, oberon_type_t
* type
)
2875 if(type
-> class != OBERON_TYPE_RECORD
)
2880 if(type
-> recursive
)
2882 oberon_error(ctx
, "recursive record declaration");
2885 type
-> recursive
= 1;
2889 oberon_prevent_recursive_record(ctx
, type
-> base
);
2892 int num_fields
= type
-> num_decl
;
2893 oberon_object_t
* field
= type
-> decl
;
2894 for(int i
= 0; i
< num_fields
; i
++)
2896 oberon_prevent_recursive_object(ctx
, field
);
2897 field
= field
-> next
;
2900 type
-> recursive
= 0;
2903 oberon_prevent_recursive_procedure(oberon_context_t
* ctx
, oberon_type_t
* type
)
2905 if(type
-> class != OBERON_TYPE_PROCEDURE
)
2910 if(type
-> recursive
)
2912 oberon_error(ctx
, "recursive procedure declaration");
2915 type
-> recursive
= 1;
2917 int num_fields
= type
-> num_decl
;
2918 oberon_object_t
* field
= type
-> decl
;
2919 for(int i
= 0; i
< num_fields
; i
++)
2921 oberon_prevent_recursive_object(ctx
, field
);
2922 field
= field
-> next
;
2925 type
-> recursive
= 0;
2929 oberon_prevent_recursive_array(oberon_context_t
* ctx
, oberon_type_t
* type
)
2931 if(type
-> class != OBERON_TYPE_ARRAY
)
2936 if(type
-> recursive
)
2938 oberon_error(ctx
, "recursive array declaration");
2941 type
-> recursive
= 1;
2943 oberon_prevent_recursive_type(ctx
, type
-> base
);
2945 type
-> recursive
= 0;
2949 oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2951 if(type
-> class == OBERON_TYPE_POINTER
)
2953 oberon_prevent_recursive_pointer(ctx
, type
);
2955 else if(type
-> class == OBERON_TYPE_RECORD
)
2957 oberon_prevent_recursive_record(ctx
, type
);
2959 else if(type
-> class == OBERON_TYPE_ARRAY
)
2961 oberon_prevent_recursive_array(ctx
, type
);
2963 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2965 oberon_prevent_recursive_procedure(ctx
, type
);
2970 oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2974 case OBERON_CLASS_VAR
:
2975 case OBERON_CLASS_TYPE
:
2976 case OBERON_CLASS_PARAM
:
2977 case OBERON_CLASS_VAR_PARAM
:
2978 case OBERON_CLASS_FIELD
:
2979 oberon_prevent_recursive_type(ctx
, x
-> type
);
2981 case OBERON_CLASS_CONST
:
2982 case OBERON_CLASS_PROC
:
2983 case OBERON_CLASS_MODULE
:
2986 oberon_error(ctx
, "oberon_prevent_recursive_object: wat");
2992 oberon_prevent_recursive_decl(oberon_context_t
* ctx
)
2994 oberon_object_t
* x
= ctx
-> decl
-> list
-> next
;
2998 oberon_prevent_recursive_object(ctx
, x
);
3003 static void oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
3004 static void oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
3007 oberon_initialize_record_fields(oberon_context_t
* ctx
, oberon_type_t
* type
)
3009 assert(type
-> class == OBERON_TYPE_RECORD
);
3011 int num_fields
= type
-> num_decl
;
3012 oberon_object_t
* field
= type
-> decl
;
3013 for(int i
= 0; i
< num_fields
; i
++)
3015 oberon_initialize_object(ctx
, field
);
3016 field
= field
-> next
;
3019 oberon_generator_init_record(ctx
, type
);
3023 oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
3025 if(type
-> class == OBERON_TYPE_NOTYPE
)
3027 oberon_error(ctx
, "undeclarated type");
3030 if(type
-> initialized
)
3035 type
-> initialized
= 1;
3037 if(type
-> class == OBERON_TYPE_POINTER
|| type
-> class == OBERON_TYPE_ARRAY
)
3039 if(type
-> class == OBERON_TYPE_ARRAY
3040 && type
-> size
!= 0
3041 && type
-> base
-> class == OBERON_TYPE_ARRAY
3042 && type
-> base
-> size
== 0)
3044 oberon_error(ctx
, "open array not allowed as array element");
3047 oberon_type_t
* rec
= type
-> base
;
3048 while(rec
-> class == OBERON_TYPE_ARRAY
|| rec
-> class == OBERON_TYPE_POINTER
)
3053 if(rec
-> class == OBERON_TYPE_RECORD
3054 && rec
-> initialized
== 0)
3056 rec
-> initialized
= 1;
3057 oberon_generator_init_type(ctx
, rec
);
3058 oberon_initialize_type(ctx
, type
-> base
);
3059 oberon_generator_init_type(ctx
, type
);
3060 oberon_initialize_record_fields(ctx
, rec
);
3064 oberon_initialize_type(ctx
, type
-> base
);
3065 oberon_generator_init_type(ctx
, type
);
3068 else if(type
-> class == OBERON_TYPE_RECORD
)
3070 printf("Init type: RECORD\n");
3071 oberon_generator_init_type(ctx
, type
);
3072 oberon_initialize_record_fields(ctx
, type
);
3074 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
3076 printf("Init type: PROCEDURE\n");
3077 int num_fields
= type
-> num_decl
;
3078 oberon_object_t
* field
= type
-> decl
;
3079 for(int i
= 0; i
< num_fields
; i
++)
3081 oberon_initialize_type(ctx
, field
-> type
);
3082 field
= field
-> next
;
3085 oberon_generator_init_type(ctx
, type
);
3089 oberon_generator_init_type(ctx
, type
);
3094 oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
3096 if(x
-> initialized
)
3101 x
-> initialized
= 1;
3105 case OBERON_CLASS_TYPE
:
3106 oberon_initialize_type(ctx
, x
-> type
);
3108 case OBERON_CLASS_VAR
:
3109 case OBERON_CLASS_FIELD
:
3110 if(x
-> type
-> class == OBERON_TYPE_ARRAY
)
3112 if(x
-> type
-> size
== 0)
3114 oberon_error(ctx
, "open array not allowed as variable or field");
3117 oberon_initialize_type(ctx
, x
-> type
);
3118 oberon_generator_init_var(ctx
, x
);
3120 case OBERON_CLASS_PARAM
:
3121 case OBERON_CLASS_VAR_PARAM
:
3122 oberon_initialize_type(ctx
, x
-> type
);
3123 oberon_generator_init_var(ctx
, x
);
3125 case OBERON_CLASS_CONST
:
3126 case OBERON_CLASS_PROC
:
3127 case OBERON_CLASS_MODULE
:
3130 oberon_error(ctx
, "oberon_initialize_object: wat");
3136 oberon_initialize_decl(oberon_context_t
* ctx
)
3138 oberon_object_t
* x
= ctx
-> decl
-> list
;
3142 oberon_initialize_object(ctx
, x
-> next
);
3148 oberon_prevent_undeclarated_procedures(oberon_context_t
* ctx
)
3150 oberon_object_t
* x
= ctx
-> decl
-> list
;
3154 if(x
-> next
-> class == OBERON_CLASS_PROC
)
3156 if(x
-> next
-> linked
== 0)
3158 oberon_error(ctx
, "unresolved forward declaration");
3166 oberon_decl_seq(oberon_context_t
* ctx
)
3168 while(ctx
-> token
>= CONST
&& ctx
-> token
<= VAR
)
3170 if(ctx
-> token
== CONST
)
3172 oberon_assert_token(ctx
, CONST
);
3173 while(ctx
-> token
== IDENT
)
3175 oberon_const_decl(ctx
);
3176 oberon_assert_token(ctx
, SEMICOLON
);
3179 else if(ctx
-> token
== TYPE
)
3181 oberon_assert_token(ctx
, TYPE
);
3182 while(ctx
-> token
== IDENT
)
3184 oberon_type_decl(ctx
);
3185 oberon_assert_token(ctx
, SEMICOLON
);
3188 else if(ctx
-> token
== VAR
)
3190 oberon_assert_token(ctx
, VAR
);
3191 while(ctx
-> token
== IDENT
)
3193 oberon_var_decl(ctx
);
3194 oberon_assert_token(ctx
, SEMICOLON
);
3199 oberon_prevent_recursive_decl(ctx
);
3200 oberon_initialize_decl(ctx
);
3202 while(ctx
-> token
== PROCEDURE
)
3204 oberon_proc_decl(ctx
);
3205 oberon_assert_token(ctx
, SEMICOLON
);
3208 oberon_prevent_undeclarated_procedures(ctx
);
3211 static oberon_expr_t
*
3212 oberon_make_temp_var_item(oberon_context_t
* ctx
, oberon_type_t
* type
)
3214 oberon_object_t
* x
;
3215 oberon_expr_t
* expr
;
3217 x
= oberon_create_object(ctx
-> decl
, "TEMP", OBERON_CLASS_VAR
, false, false);
3220 oberon_generator_init_temp_var(ctx
, x
);
3222 expr
= oberon_new_item(MODE_VAR
, type
, false);
3223 expr
-> item
.var
= x
;
3228 oberon_statement_seq(oberon_context_t
* ctx
);
3231 oberon_assign(oberon_context_t
* ctx
, oberon_expr_t
* src
, oberon_expr_t
* dst
)
3233 oberon_check_dst(ctx
, dst
);
3234 oberon_check_assignment_compatible(ctx
, src
, dst
-> result
);
3236 if(oberon_is_array_of_char_type(dst
-> result
)
3237 && oberon_is_string_type(src
-> result
))
3240 oberon_make_copy_call(ctx
, 2, src
);
3244 src
= oberon_cast_expr(ctx
, src
, dst
-> result
);
3245 oberon_generate_assign(ctx
, src
, dst
);
3249 static oberon_expr_t
*
3250 oberon_case_labels(oberon_context_t
* ctx
, oberon_expr_t
* val
)
3254 oberon_expr_t
* cond
;
3255 oberon_expr_t
* cond2
;
3257 e1
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3260 if(ctx
-> token
== DOTDOT
)
3262 oberon_assert_token(ctx
, DOTDOT
);
3263 e2
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3269 cond
= oberon_make_bin_op(ctx
, EQUAL
, val
, e1
);
3273 /* val >= e1 && val <= e2 */
3274 cond
= oberon_make_bin_op(ctx
, GEQ
, val
, e1
);
3275 cond2
= oberon_make_bin_op(ctx
, LEQ
, val
, e2
);
3276 cond
= oberon_make_bin_op(ctx
, AND
, cond
, cond2
);
3283 oberon_case(oberon_context_t
* ctx
, oberon_expr_t
* val
, gen_label_t
* end
)
3285 oberon_expr_t
* cond
;
3286 oberon_expr_t
* cond2
;
3287 gen_label_t
* this_end
;
3289 if(ISEXPR(ctx
-> token
))
3291 this_end
= oberon_generator_reserve_label(ctx
);
3293 cond
= oberon_case_labels(ctx
, val
);
3294 while(ctx
-> token
== COMMA
)
3296 oberon_assert_token(ctx
, COMMA
);
3298 cond2
= oberon_case_labels(ctx
, val
);
3299 cond
= oberon_make_bin_op(ctx
, OR
, cond
, cond2
);
3301 oberon_assert_token(ctx
, COLON
);
3303 oberon_generate_branch(ctx
, cond
, false, this_end
);
3304 oberon_statement_seq(ctx
);
3305 oberon_generate_goto(ctx
, end
);
3307 oberon_generate_label(ctx
, this_end
);
3312 oberon_case_statement(oberon_context_t
* ctx
)
3314 oberon_expr_t
* val
;
3315 oberon_expr_t
* expr
;
3318 end
= oberon_generator_reserve_label(ctx
);
3320 oberon_assert_token(ctx
, CASE
);
3321 expr
= oberon_expr(ctx
);
3322 val
= oberon_make_temp_var_item(ctx
, expr
-> result
);
3323 oberon_assign(ctx
, expr
, val
);
3324 oberon_assert_token(ctx
, OF
);
3325 oberon_case(ctx
, val
, end
);
3326 while(ctx
-> token
== BAR
)
3328 oberon_assert_token(ctx
, BAR
);
3329 oberon_case(ctx
, val
, end
);
3332 if(ctx
-> token
== ELSE
)
3334 oberon_assert_token(ctx
, ELSE
);
3335 oberon_statement_seq(ctx
);
3339 oberon_generate_trap(ctx
, -1);
3342 oberon_generate_label(ctx
, end
);
3343 oberon_assert_token(ctx
, END
);
3347 oberon_with_guard_do(oberon_context_t
* ctx
, gen_label_t
* end
)
3349 oberon_object_t
* var
;
3350 oberon_expr_t
* var_expr
;
3351 oberon_expr_t
* type_expr
;
3352 oberon_expr_t
* cond
;
3353 oberon_type_t
* type
;
3354 oberon_type_t
* old_type
;
3355 gen_label_t
* this_end
;
3357 this_end
= oberon_generator_reserve_label(ctx
);
3359 var_expr
= oberon_qualident_expr(ctx
);
3360 oberon_assert_token(ctx
, COLON
);
3361 type_expr
= oberon_qualident_expr(ctx
);
3362 cond
= oberon_make_bin_op(ctx
, IS
, var_expr
, type_expr
);
3364 var
= var_expr
-> item
.var
;
3365 type
= type_expr
-> result
;
3366 old_type
= var
-> type
;
3368 oberon_assert_token(ctx
, DO
);
3369 oberon_generate_branch(ctx
, cond
, false, this_end
);
3372 oberon_set_typecheck(var
, true);
3374 oberon_statement_seq(ctx
);
3376 var
-> type
= old_type
;
3377 oberon_set_typecheck(var
, false);
3379 oberon_generate_goto(ctx
, end
);
3380 oberon_generate_label(ctx
, this_end
);
3384 oberon_with_statement(oberon_context_t
* ctx
)
3387 end
= oberon_generator_reserve_label(ctx
);
3389 oberon_assert_token(ctx
, WITH
);
3390 oberon_with_guard_do(ctx
, end
);
3391 while(ctx
-> token
== BAR
)
3393 oberon_assert_token(ctx
, BAR
);
3394 oberon_with_guard_do(ctx
, end
);
3397 if(ctx
-> token
== ELSE
)
3399 oberon_assert_token(ctx
, ELSE
);
3400 oberon_statement_seq(ctx
);
3404 oberon_generate_trap(ctx
, -2);
3407 oberon_generate_label(ctx
, end
);
3408 oberon_assert_token(ctx
, END
);
3412 oberon_statement(oberon_context_t
* ctx
)
3414 oberon_expr_t
* item1
;
3415 oberon_expr_t
* item2
;
3417 if(ctx
-> token
== IDENT
)
3419 item1
= oberon_designator(ctx
);
3420 if(ctx
-> token
== ASSIGN
)
3422 oberon_assert_token(ctx
, ASSIGN
);
3423 item2
= oberon_expr(ctx
);
3424 oberon_assign(ctx
, item2
, item1
);
3428 oberon_opt_proc_parens(ctx
, item1
);
3431 else if(ctx
-> token
== IF
)
3435 oberon_expr_t
* cond
;
3437 els
= oberon_generator_reserve_label(ctx
);
3438 end
= oberon_generator_reserve_label(ctx
);
3440 oberon_assert_token(ctx
, IF
);
3441 cond
= oberon_expr(ctx
);
3442 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3444 oberon_error(ctx
, "condition must be boolean");
3446 oberon_assert_token(ctx
, THEN
);
3447 oberon_generate_branch(ctx
, cond
, false, els
);
3448 oberon_statement_seq(ctx
);
3449 oberon_generate_goto(ctx
, end
);
3450 oberon_generate_label(ctx
, els
);
3452 while(ctx
-> token
== ELSIF
)
3454 els
= oberon_generator_reserve_label(ctx
);
3456 oberon_assert_token(ctx
, ELSIF
);
3457 cond
= oberon_expr(ctx
);
3458 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3460 oberon_error(ctx
, "condition must be boolean");
3462 oberon_assert_token(ctx
, THEN
);
3463 oberon_generate_branch(ctx
, cond
, false, els
);
3464 oberon_statement_seq(ctx
);
3465 oberon_generate_goto(ctx
, end
);
3466 oberon_generate_label(ctx
, els
);
3469 if(ctx
-> token
== ELSE
)
3471 oberon_assert_token(ctx
, ELSE
);
3472 oberon_statement_seq(ctx
);
3475 oberon_generate_label(ctx
, end
);
3476 oberon_assert_token(ctx
, END
);
3478 else if(ctx
-> token
== WHILE
)
3480 gen_label_t
* begin
;
3482 oberon_expr_t
* cond
;
3484 begin
= oberon_generator_reserve_label(ctx
);
3485 end
= oberon_generator_reserve_label(ctx
);
3487 oberon_assert_token(ctx
, WHILE
);
3488 oberon_generate_label(ctx
, begin
);
3489 cond
= oberon_expr(ctx
);
3490 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3492 oberon_error(ctx
, "condition must be boolean");
3494 oberon_generate_branch(ctx
, cond
, false, end
);
3496 oberon_assert_token(ctx
, DO
);
3497 oberon_statement_seq(ctx
);
3498 oberon_generate_goto(ctx
, begin
);
3500 oberon_assert_token(ctx
, END
);
3501 oberon_generate_label(ctx
, end
);
3503 else if(ctx
-> token
== REPEAT
)
3505 gen_label_t
* begin
;
3506 oberon_expr_t
* cond
;
3508 begin
= oberon_generator_reserve_label(ctx
);
3509 oberon_generate_label(ctx
, begin
);
3510 oberon_assert_token(ctx
, REPEAT
);
3512 oberon_statement_seq(ctx
);
3514 oberon_assert_token(ctx
, UNTIL
);
3516 cond
= oberon_expr(ctx
);
3517 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3519 oberon_error(ctx
, "condition must be boolean");
3522 oberon_generate_branch(ctx
, cond
, false, begin
);
3524 else if(ctx
-> token
== FOR
)
3526 oberon_expr_t
* from
;
3527 oberon_expr_t
* index
;
3529 oberon_expr_t
* bound
;
3531 oberon_expr_t
* cond
;
3532 oberon_expr_t
* count
;
3533 gen_label_t
* begin
;
3538 begin
= oberon_generator_reserve_label(ctx
);
3539 end
= oberon_generator_reserve_label(ctx
);
3541 oberon_assert_token(ctx
, FOR
);
3542 iname
= oberon_assert_ident(ctx
);
3543 index
= oberon_ident_item(ctx
, iname
);
3544 oberon_assert_token(ctx
, ASSIGN
);
3545 from
= oberon_expr(ctx
);
3546 oberon_assert_token(ctx
, TO
);
3547 bound
= oberon_make_temp_var_item(ctx
, index
-> result
);
3548 to
= oberon_expr(ctx
);
3549 oberon_assign(ctx
, to
, bound
); // сначала temp
3550 oberon_assign(ctx
, from
, index
); // потом i
3551 if(ctx
-> token
== BY
)
3553 oberon_assert_token(ctx
, BY
);
3554 by
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3558 by
= oberon_make_integer(ctx
, 1);
3561 if(by
-> result
-> class != OBERON_TYPE_INTEGER
)
3563 oberon_error(ctx
, "must be integer");
3566 if(by
-> item
.integer
> 0)
3570 else if(by
-> item
.integer
< 0)
3576 oberon_error(ctx
, "zero step not allowed");
3579 oberon_assert_token(ctx
, DO
);
3580 oberon_generate_label(ctx
, begin
);
3581 cond
= oberon_make_bin_op(ctx
, op
, index
, bound
);
3582 oberon_generate_branch(ctx
, cond
, false, end
);
3583 oberon_statement_seq(ctx
);
3584 count
= oberon_make_bin_op(ctx
, PLUS
, index
, by
);
3585 oberon_assign(ctx
, count
, index
);
3586 oberon_generate_goto(ctx
, begin
);
3587 oberon_generate_label(ctx
, end
);
3588 oberon_assert_token(ctx
, END
);
3590 else if(ctx
-> token
== LOOP
)
3592 gen_label_t
* begin
;
3595 begin
= oberon_generator_reserve_label(ctx
);
3596 end
= oberon_generator_reserve_label(ctx
);
3598 oberon_open_scope(ctx
);
3599 oberon_assert_token(ctx
, LOOP
);
3600 oberon_generate_label(ctx
, begin
);
3601 ctx
-> decl
-> exit_label
= end
;
3602 oberon_statement_seq(ctx
);
3603 oberon_generate_goto(ctx
, begin
);
3604 oberon_generate_label(ctx
, end
);
3605 oberon_assert_token(ctx
, END
);
3606 oberon_close_scope(ctx
-> decl
);
3608 else if(ctx
-> token
== EXIT
)
3610 oberon_assert_token(ctx
, EXIT
);
3611 if(ctx
-> decl
-> exit_label
== NULL
)
3613 oberon_error(ctx
, "not in LOOP-END");
3615 oberon_generate_goto(ctx
, ctx
-> decl
-> exit_label
);
3617 else if(ctx
-> token
== CASE
)
3619 oberon_case_statement(ctx
);
3621 else if(ctx
-> token
== WITH
)
3623 oberon_with_statement(ctx
);
3625 else if(ctx
-> token
== RETURN
)
3627 oberon_assert_token(ctx
, RETURN
);
3628 if(ISEXPR(ctx
-> token
))
3630 oberon_expr_t
* expr
;
3631 expr
= oberon_expr(ctx
);
3632 oberon_make_return(ctx
, expr
);
3636 oberon_make_return(ctx
, NULL
);
3642 oberon_statement_seq(oberon_context_t
* ctx
)
3644 oberon_statement(ctx
);
3645 while(ctx
-> token
== SEMICOLON
)
3647 oberon_assert_token(ctx
, SEMICOLON
);
3648 oberon_statement(ctx
);
3653 oberon_import_module(oberon_context_t
* ctx
, char * alias
, char * name
)
3655 oberon_module_t
* m
= ctx
-> module_list
;
3656 while(m
&& strcmp(m
-> name
, name
) != 0)
3663 oberon_scanner_t
* s
;
3664 s
= ctx
-> import_module(name
);
3667 oberon_error(ctx
, "no such module %s", name
);
3670 m
= oberon_compile_module(ctx
, s
);
3676 oberon_error(ctx
, "cyclic module import");
3679 oberon_object_t
* ident
;
3680 ident
= oberon_define_object(ctx
-> decl
, alias
, OBERON_CLASS_MODULE
, false, false, false);
3681 ident
-> module
= m
;
3685 oberon_import_decl(oberon_context_t
* ctx
)
3690 alias
= name
= oberon_assert_ident(ctx
);
3691 if(ctx
-> token
== ASSIGN
)
3693 oberon_assert_token(ctx
, ASSIGN
);
3694 name
= oberon_assert_ident(ctx
);
3697 oberon_import_module(ctx
, alias
, name
);
3701 oberon_import_list(oberon_context_t
* ctx
)
3703 oberon_assert_token(ctx
, IMPORT
);
3705 oberon_import_decl(ctx
);
3706 while(ctx
-> token
== COMMA
)
3708 oberon_assert_token(ctx
, COMMA
);
3709 oberon_import_decl(ctx
);
3712 oberon_assert_token(ctx
, SEMICOLON
);
3716 oberon_parse_module(oberon_context_t
* ctx
)
3720 oberon_read_token(ctx
);
3722 oberon_assert_token(ctx
, MODULE
);
3723 name1
= oberon_assert_ident(ctx
);
3724 oberon_assert_token(ctx
, SEMICOLON
);
3725 ctx
-> mod
-> name
= name1
;
3727 oberon_generator_init_module(ctx
, ctx
-> mod
);
3729 if(ctx
-> token
== IMPORT
)
3731 oberon_import_list(ctx
);
3734 oberon_decl_seq(ctx
);
3736 oberon_generate_begin_module(ctx
);
3737 if(ctx
-> token
== BEGIN
)
3739 oberon_assert_token(ctx
, BEGIN
);
3740 oberon_statement_seq(ctx
);
3742 oberon_generate_end_module(ctx
);
3744 oberon_assert_token(ctx
, END
);
3745 name2
= oberon_assert_ident(ctx
);
3746 oberon_expect_token(ctx
, DOT
);
3748 if(strcmp(name1
, name2
) != 0)
3750 oberon_error(ctx
, "module name not matched");
3753 oberon_generator_fini_module(ctx
-> mod
);
3756 // =======================================================================
3758 // =======================================================================
3760 static oberon_expr_t
*
3761 oberon_make_min_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3765 oberon_error(ctx
, "too few arguments");
3770 oberon_error(ctx
, "too mach arguments");
3773 oberon_expr_t
* arg
;
3776 if(!oberon_is_type_expr(arg
))
3778 oberon_error(ctx
, "MIN accept only type");
3781 oberon_expr_t
* expr
;
3782 int bits
= arg
-> result
-> size
* 8;
3783 switch(arg
-> result
-> class)
3785 case OBERON_TYPE_INTEGER
:
3786 expr
= oberon_make_integer(ctx
, -powl(2, bits
- 1));
3788 case OBERON_TYPE_BOOLEAN
:
3789 expr
= oberon_make_boolean(ctx
, false);
3791 case OBERON_TYPE_CHAR
:
3792 expr
= oberon_make_char(ctx
, 0);
3794 case OBERON_TYPE_REAL
:
3795 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (-FLT_MAX
) : (-DBL_MAX
), arg
-> result
);
3797 case OBERON_TYPE_SET
:
3798 expr
= oberon_make_integer(ctx
, 0);
3801 oberon_error(ctx
, "allowed only basic types");
3808 static oberon_expr_t
*
3809 oberon_make_max_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3813 oberon_error(ctx
, "too few arguments");
3818 oberon_error(ctx
, "too mach arguments");
3821 oberon_expr_t
* arg
;
3824 if(!oberon_is_type_expr(arg
))
3826 oberon_error(ctx
, "MAX accept only type");
3829 oberon_expr_t
* expr
;
3830 int bits
= arg
-> result
-> size
* 8;
3831 switch(arg
-> result
-> class)
3833 case OBERON_TYPE_INTEGER
:
3834 expr
= oberon_make_integer(ctx
, powl(2, bits
- 1) - 1);
3836 case OBERON_TYPE_BOOLEAN
:
3837 expr
= oberon_make_boolean(ctx
, true);
3839 case OBERON_TYPE_CHAR
:
3840 expr
= oberon_make_char(ctx
, powl(2, bits
) - 1);
3842 case OBERON_TYPE_REAL
:
3843 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (FLT_MAX
) : (DBL_MAX
), arg
-> result
);
3845 case OBERON_TYPE_SET
:
3846 expr
= oberon_make_integer(ctx
, bits
);
3849 oberon_error(ctx
, "allowed only basic types");
3856 static oberon_expr_t
*
3857 oberon_make_size_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3861 oberon_error(ctx
, "too few arguments");
3866 oberon_error(ctx
, "too mach arguments");
3869 oberon_expr_t
* arg
;
3871 if(!oberon_is_type_expr(arg
))
3873 oberon_error(ctx
, "SIZE accept only type");
3877 oberon_expr_t
* expr
;
3878 oberon_type_t
* type
= arg
-> result
;
3879 switch(type
-> class)
3881 case OBERON_TYPE_INTEGER
:
3882 case OBERON_TYPE_BOOLEAN
:
3883 case OBERON_TYPE_REAL
:
3884 case OBERON_TYPE_CHAR
:
3885 case OBERON_TYPE_SET
:
3886 size
= type
-> size
;
3889 oberon_error(ctx
, "TODO SIZE");
3893 expr
= oberon_make_integer(ctx
, size
);
3897 static oberon_expr_t
*
3898 oberon_make_abs_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3902 oberon_error(ctx
, "too few arguments");
3907 oberon_error(ctx
, "too mach arguments");
3910 oberon_expr_t
* arg
;
3912 oberon_check_src(ctx
, arg
);
3914 if(!oberon_is_number_type(arg
-> result
))
3916 oberon_error(ctx
, "ABS accepts only numbers");
3919 oberon_expr_t
* expr
;
3920 if(oberon_is_const(arg
))
3922 if(oberon_is_real_type(arg
-> result
))
3924 double x
= arg
-> item
.real
;
3925 expr
= oberon_make_real(ctx
, fabsl(x
), arg
-> result
);
3929 int64_t x
= arg
-> item
.integer
;
3930 expr
= oberon_make_integer(ctx
, llabs(x
));
3935 expr
= oberon_new_operator(OP_ABS
, arg
-> result
, arg
, NULL
);
3941 oberon_make_inc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3945 oberon_error(ctx
, "too few arguments");
3950 oberon_error(ctx
, "too mach arguments");
3953 oberon_expr_t
* dst
;
3955 oberon_check_dst(ctx
, dst
);
3957 if(!oberon_is_integer_type(dst
-> result
))
3959 oberon_error(ctx
, "expect integer");
3962 oberon_expr_t
* step
;
3965 step
= list_args
-> next
;
3966 oberon_check_src(ctx
, step
);
3967 if(!oberon_is_integer_type(step
-> result
))
3969 oberon_error(ctx
, "expect integer");
3974 step
= oberon_make_integer(ctx
, 1);
3977 oberon_expr_t
* expr
;
3978 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, step
);
3979 oberon_assign(ctx
, expr
, dst
);
3983 oberon_make_incl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3987 oberon_error(ctx
, "too few arguments");
3992 oberon_error(ctx
, "too mach arguments");
3995 oberon_expr_t
* dst
;
3997 oberon_check_dst(ctx
, dst
);
3999 if(!oberon_is_set_type(dst
-> result
))
4001 oberon_error(ctx
, "expect integer");
4005 x
= list_args
-> next
;
4006 oberon_check_src(ctx
, x
);
4008 if(!oberon_is_integer_type(x
-> result
))
4010 oberon_error(ctx
, "expect integer");
4013 oberon_expr_t
* expr
;
4014 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
4015 oberon_assign(ctx
, expr
, dst
);
4019 oberon_make_excl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4023 oberon_error(ctx
, "too few arguments");
4028 oberon_error(ctx
, "too mach arguments");
4031 oberon_expr_t
* dst
;
4033 oberon_check_dst(ctx
, dst
);
4035 if(!oberon_is_set_type(dst
-> result
))
4037 oberon_error(ctx
, "expect integer");
4041 x
= list_args
-> next
;
4042 oberon_check_src(ctx
, x
);
4044 if(!oberon_is_integer_type(x
-> result
))
4046 oberon_error(ctx
, "expect integer");
4049 oberon_expr_t
* expr
;
4050 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
4051 oberon_assign(ctx
, expr
, dst
);
4055 oberon_make_dec_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4059 oberon_error(ctx
, "too few arguments");
4064 oberon_error(ctx
, "too mach arguments");
4067 oberon_expr_t
* dst
;
4069 oberon_check_dst(ctx
, dst
);
4071 if(!oberon_is_integer_type(dst
-> result
))
4073 oberon_error(ctx
, "expect integer");
4076 oberon_expr_t
* step
;
4079 step
= list_args
-> next
;
4080 oberon_check_src(ctx
, step
);
4081 if(!oberon_is_integer_type(step
-> result
))
4083 oberon_error(ctx
, "expect integer");
4088 step
= oberon_make_integer(ctx
, 1);
4091 oberon_expr_t
* expr
;
4092 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, step
);
4093 oberon_assign(ctx
, expr
, dst
);
4097 oberon_make_new_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4101 oberon_error(ctx
, "too few arguments");
4104 oberon_expr_t
* dst
;
4106 oberon_check_dst(ctx
, dst
);
4108 oberon_type_t
* type
;
4109 type
= dst
-> result
;
4111 if(type
-> class != OBERON_TYPE_POINTER
)
4113 oberon_error(ctx
, "not a pointer");
4116 type
= type
-> base
;
4118 oberon_expr_t
* src
;
4119 src
= oberon_new_item(MODE_NEW
, dst
-> result
, 0);
4120 src
-> item
.num_args
= 0;
4121 src
-> item
.args
= NULL
;
4124 if(type
-> class == OBERON_TYPE_ARRAY
)
4126 if(type
-> size
== 0)
4128 oberon_type_t
* x
= type
;
4129 while(x
-> class == OBERON_TYPE_ARRAY
)
4139 if(num_args
< max_args
)
4141 oberon_error(ctx
, "too few arguments");
4144 if(num_args
> max_args
)
4146 oberon_error(ctx
, "too mach arguments");
4149 int num_sizes
= max_args
- 1;
4150 oberon_expr_t
* size_list
= list_args
-> next
;
4152 oberon_expr_t
* arg
= size_list
;
4153 for(int i
= 0; i
< max_args
- 1; i
++)
4155 oberon_check_src(ctx
, arg
);
4156 if(arg
-> result
-> class != OBERON_TYPE_INTEGER
)
4158 oberon_error(ctx
, "size must be integer");
4163 src
-> item
.num_args
= num_sizes
;
4164 src
-> item
.args
= size_list
;
4166 else if(type
-> class != OBERON_TYPE_RECORD
)
4168 oberon_error(ctx
, "oberon_make_new_call: wat");
4171 if(num_args
> max_args
)
4173 oberon_error(ctx
, "too mach arguments");
4176 oberon_assign(ctx
, src
, dst
);
4180 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4184 oberon_error(ctx
, "too few arguments");
4189 oberon_error(ctx
, "too mach arguments");
4192 oberon_expr_t
* src
;
4194 oberon_check_src(ctx
, src
);
4196 oberon_expr_t
* dst
;
4197 dst
= list_args
-> next
;
4198 oberon_check_dst(ctx
, dst
);
4200 if(!oberon_is_string_type(src
-> result
) && !oberon_is_array_of_char_type(src
-> result
))
4202 oberon_error(ctx
, "source must be string or array of char");
4205 if(!oberon_is_array_of_char_type(dst
-> result
))
4207 oberon_error(ctx
, "dst must be array of char");
4210 oberon_generate_copy(ctx
, src
, dst
);
4214 oberon_make_assert_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4218 oberon_error(ctx
, "too few arguments");
4223 oberon_error(ctx
, "too mach arguments");
4226 oberon_expr_t
* cond
;
4228 oberon_check_src(ctx
, cond
);
4230 if(!oberon_is_boolean_type(cond
-> result
))
4232 oberon_error(ctx
, "expected boolean");
4237 oberon_generate_assert(ctx
, cond
);
4241 oberon_expr_t
* num
;
4242 num
= list_args
-> next
;
4243 oberon_check_src(ctx
, num
);
4245 if(!oberon_is_integer_type(num
-> result
))
4247 oberon_error(ctx
, "expected integer");
4250 oberon_check_const(ctx
, num
);
4252 oberon_generate_assert_n(ctx
, cond
, num
-> item
.integer
);
4257 oberon_make_halt_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4261 oberon_error(ctx
, "too few arguments");
4266 oberon_error(ctx
, "too mach arguments");
4269 oberon_expr_t
* num
;
4271 oberon_check_src(ctx
, num
);
4273 if(num
-> result
-> class != OBERON_TYPE_INTEGER
)
4275 oberon_error(ctx
, "expected integer");
4278 oberon_check_const(ctx
, num
);
4280 oberon_generate_halt(ctx
, num
-> item
.integer
);
4283 static oberon_expr_t
*
4284 oberon_make_ash_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4288 oberon_error(ctx
, "too few arguments");
4293 oberon_error(ctx
, "too mach arguments");
4296 oberon_expr_t
* arg1
;
4298 oberon_check_src(ctx
, arg1
);
4299 if(arg1
-> result
-> class != OBERON_TYPE_INTEGER
)
4301 oberon_error(ctx
, "expected integer");
4304 oberon_expr_t
* arg2
;
4305 arg2
= list_args
-> next
;
4306 oberon_check_src(ctx
, arg2
);
4307 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4309 oberon_error(ctx
, "expected integer");
4312 oberon_expr_t
* expr
;
4313 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4315 int64_t x
= arg1
-> item
.integer
;
4316 int64_t y
= arg2
-> item
.integer
;
4317 int64_t v
= (y
> 0) ? (x
<< y
) : (x
>> labs(y
));
4318 expr
= oberon_make_integer(ctx
, v
);
4322 expr
= oberon_new_operator(OP_ASH
, arg1
-> result
, arg1
, arg2
);
4328 static oberon_expr_t
*
4329 oberon_make_lsh_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4333 oberon_error(ctx
, "too few arguments");
4338 oberon_error(ctx
, "too mach arguments");
4341 oberon_expr_t
* arg1
;
4343 oberon_check_src(ctx
, arg1
);
4345 oberon_type_t
* t
= arg1
-> result
;
4346 if(!oberon_is_integer_type(t
)
4347 && !oberon_is_char_type(t
)
4348 && !oberon_is_system_byte_type(t
))
4350 oberon_error(ctx
, "expected integer, char, or SYSTEM.BYTE");
4353 oberon_expr_t
* arg2
;
4354 arg2
= list_args
-> next
;
4355 oberon_check_src(ctx
, arg2
);
4356 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4358 oberon_error(ctx
, "expected integer");
4361 oberon_expr_t
* expr
;
4362 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4364 uint64_t x
= arg1
-> item
.integer
;
4365 int64_t y
= arg2
-> item
.integer
;
4366 uint64_t v
= (y
> 0) ? (x
<< y
) : (x
>> labs(y
));
4368 if(oberon_is_integer_type(t
))
4370 expr
= oberon_make_integer(ctx
, v
);
4372 else if(oberon_is_char_type(t
))
4374 expr
= oberon_make_char(ctx
, v
);
4378 expr
= oberon_make_system_byte(ctx
, v
);
4383 expr
= oberon_new_operator(OP_LSH
, arg1
-> result
, arg1
, arg2
);
4384 expr
= oberon_cast_expr(ctx
, expr
, t
);
4390 static oberon_expr_t
*
4391 oberon_make_rot_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4395 oberon_error(ctx
, "too few arguments");
4400 oberon_error(ctx
, "too mach arguments");
4403 oberon_expr_t
* arg1
;
4405 oberon_check_src(ctx
, arg1
);
4407 oberon_type_t
* t
= arg1
-> result
;
4408 if(!oberon_is_integer_type(t
)
4409 && !oberon_is_char_type(t
)
4410 && !oberon_is_system_byte_type(t
))
4412 oberon_error(ctx
, "expected integer, char, or SYSTEM.BYTE");
4415 oberon_expr_t
* arg2
;
4416 arg2
= list_args
-> next
;
4417 oberon_check_src(ctx
, arg2
);
4418 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4420 oberon_error(ctx
, "expected integer");
4423 oberon_expr_t
* expr
;
4424 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4426 uint64_t x
= arg1
-> item
.integer
;
4427 int64_t y
= arg2
-> item
.integer
;
4432 v
= (x
<< y
) | (x
>> (64 - y
));
4437 v
= (x
>> y
) | (x
<< (64 - y
));
4440 if(oberon_is_integer_type(t
))
4442 expr
= oberon_make_integer(ctx
, v
);
4444 else if(oberon_is_char_type(t
))
4446 expr
= oberon_make_char(ctx
, v
);
4450 expr
= oberon_make_system_byte(ctx
, v
);
4455 expr
= oberon_new_operator(OP_ROT
, arg1
-> result
, arg1
, arg2
);
4456 expr
= oberon_cast_expr(ctx
, expr
, t
);
4462 static oberon_expr_t
*
4463 oberon_make_cap_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4467 oberon_error(ctx
, "too few arguments");
4472 oberon_error(ctx
, "too mach arguments");
4475 oberon_expr_t
* arg
;
4477 oberon_check_src(ctx
, arg
);
4479 if(!oberon_is_char_type(arg
-> result
))
4481 oberon_error(ctx
, "expected char");
4484 oberon_expr_t
* expr
;
4485 if(oberon_is_const(arg
))
4487 expr
= oberon_make_char(ctx
, toupper(arg
-> item
.integer
));
4491 expr
= oberon_new_operator(OP_CAP
, arg
-> result
, arg
, NULL
);
4497 static oberon_expr_t
*
4498 oberon_make_chr_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4502 oberon_error(ctx
, "too few arguments");
4507 oberon_error(ctx
, "too mach arguments");
4510 oberon_expr_t
* arg
;
4512 oberon_check_src(ctx
, arg
);
4514 if(!oberon_is_integer_type(arg
-> result
))
4516 oberon_error(ctx
, "expected integer");
4519 oberon_expr_t
* expr
;
4520 if(oberon_is_const(arg
))
4522 expr
= oberon_make_char(ctx
, arg
-> item
.integer
);
4526 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> char_type
);
4531 static oberon_expr_t
*
4532 oberon_make_ord_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4536 oberon_error(ctx
, "too few arguments");
4541 oberon_error(ctx
, "too mach arguments");
4544 oberon_expr_t
* arg
;
4546 oberon_check_src(ctx
, arg
);
4548 if(!oberon_is_char_type(arg
-> result
) && !oberon_is_string_of_one(arg
))
4550 oberon_error(ctx
, "expected char");
4553 oberon_expr_t
* expr
;
4554 if(oberon_is_const(arg
))
4556 expr
= oberon_make_integer(ctx
, arg
-> item
.integer
);
4560 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> shortint_type
);
4565 static oberon_expr_t
*
4566 oberon_make_entier_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4570 oberon_error(ctx
, "too few arguments");
4575 oberon_error(ctx
, "too mach arguments");
4578 oberon_expr_t
* arg
;
4580 oberon_check_src(ctx
, arg
);
4582 if(!oberon_is_real_type(arg
-> result
))
4584 oberon_error(ctx
, "expected real");
4587 oberon_expr_t
* expr
;
4588 if(oberon_is_const(arg
))
4590 expr
= oberon_make_integer(ctx
, floor(arg
-> item
.real
));
4594 expr
= oberon_new_operator(OP_ENTIER
, ctx
-> int_type
, arg
, NULL
);
4599 static oberon_expr_t
*
4600 oberon_make_odd_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4604 oberon_error(ctx
, "too few arguments");
4609 oberon_error(ctx
, "too mach arguments");
4612 oberon_expr_t
* arg
;
4614 oberon_check_src(ctx
, arg
);
4616 if(!oberon_is_integer_type(arg
-> result
))
4618 oberon_error(ctx
, "expected integer");
4621 oberon_expr_t
* expr
;
4622 expr
= oberon_make_bin_op(ctx
, MOD
, arg
, oberon_make_integer(ctx
, 2));
4623 expr
= oberon_make_bin_op(ctx
, EQUAL
, expr
, oberon_make_integer(ctx
, 1));
4627 static oberon_expr_t
*
4628 oberon_make_cc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4632 oberon_error(ctx
, "too few arguments");
4637 oberon_error(ctx
, "too mach arguments");
4640 oberon_expr_t
* arg
;
4642 oberon_check_src(ctx
, arg
);
4643 oberon_check_const(ctx
, arg
);
4645 if(!oberon_is_integer_type(arg
-> result
))
4647 oberon_error(ctx
, "expected integer");
4650 /* n >= 0 && n <= 15 */
4652 oberon_expr_t
* cond1
;
4653 oberon_expr_t
* cond2
;
4654 cond1
= oberon_make_bin_op(ctx
, GEQ
, arg
, oberon_make_integer(ctx
, 0));
4655 cond2
= oberon_make_bin_op(ctx
, LEQ
, arg
, oberon_make_integer(ctx
, 15));
4656 return oberon_make_bin_op(ctx
, AND
, cond1
, cond2
);
4659 static oberon_expr_t
*
4660 oberon_make_short_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4664 oberon_error(ctx
, "too few arguments");
4669 oberon_error(ctx
, "too mach arguments");
4672 oberon_expr_t
* arg
;
4674 oberon_check_src(ctx
, arg
);
4676 if(arg
-> result
-> shorter
== NULL
)
4678 oberon_error(ctx
, "already shorter");
4681 oberon_expr_t
* expr
;
4682 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> shorter
);
4686 static oberon_expr_t
*
4687 oberon_make_long_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4691 oberon_error(ctx
, "too few arguments");
4696 oberon_error(ctx
, "too mach arguments");
4699 oberon_expr_t
* arg
;
4701 oberon_check_src(ctx
, arg
);
4703 if(arg
-> result
-> longer
== NULL
)
4705 oberon_error(ctx
, "already longer");
4708 oberon_expr_t
* expr
;
4709 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> longer
);
4713 static oberon_expr_t
*
4714 oberon_make_val_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4718 oberon_error(ctx
, "too few arguments");
4723 oberon_error(ctx
, "too mach arguments");
4726 oberon_expr_t
* typ
;
4728 if(!oberon_is_type_expr(typ
))
4730 oberon_error(ctx
, "requires type");
4733 oberon_expr_t
* arg
;
4734 arg
= list_args
-> next
;
4735 oberon_check_src(ctx
, arg
);
4737 oberon_expr_t
* expr
;
4738 expr
= oberon_hard_cast_expr(ctx
, arg
, typ
-> result
);
4742 static oberon_expr_t
*
4743 oberon_make_len_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4747 oberon_error(ctx
, "too few arguments");
4752 oberon_error(ctx
, "too mach arguments");
4757 oberon_check_src(ctx
, v
);
4759 if(!oberon_is_array_type(v
-> result
))
4761 oberon_error(ctx
, "expected array");
4767 oberon_expr_t
* num
;
4768 num
= list_args
-> next
;
4769 oberon_check_src(ctx
, num
);
4771 if(!oberon_is_integer_type(num
-> result
))
4773 oberon_error(ctx
, "expected integer");
4775 oberon_check_const(ctx
, num
);
4777 n
= num
-> item
.integer
;
4781 oberon_type_t
* arr
= v
-> result
;
4782 while(arr
-> class == OBERON_TYPE_ARRAY
)
4788 if(n
< 0 || n
> dim
)
4790 oberon_error(ctx
, "not in range 0..%i", dim
- 1);
4793 assert(v
-> is_item
);
4795 oberon_expr_t
* expr
;
4796 expr
= oberon_new_item(MODE_LEN
, ctx
-> int_type
, true);
4797 expr
-> item
.parent
= (oberon_item_t
*) v
;
4798 expr
-> item
.integer
= n
;
4803 oberon_new_const(oberon_context_t
* ctx
, char * name
, oberon_expr_t
* expr
)
4805 oberon_object_t
* constant
;
4806 constant
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_CONST
, true, false, false);
4807 oberon_check_const(ctx
, expr
);
4808 constant
-> value
= (oberon_item_t
*) expr
;
4812 register_default_types(oberon_context_t
* ctx
)
4814 ctx
-> notype_type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
4815 oberon_generator_init_type(ctx
, ctx
-> notype_type
);
4817 ctx
-> nil_type
= oberon_new_type_ptr(OBERON_TYPE_NIL
);
4818 oberon_generator_init_type(ctx
, ctx
-> nil_type
);
4820 ctx
-> string_type
= oberon_new_type_string(1);
4821 oberon_generator_init_type(ctx
, ctx
-> string_type
);
4823 ctx
-> bool_type
= oberon_new_type_boolean();
4824 oberon_generator_init_type(ctx
, ctx
-> bool_type
);
4826 ctx
-> char_type
= oberon_new_type_char(1);
4827 oberon_generator_init_type(ctx
, ctx
-> char_type
);
4829 ctx
-> byte_type
= oberon_new_type_integer(1);
4830 oberon_generator_init_type(ctx
, ctx
-> byte_type
);
4832 ctx
-> shortint_type
= oberon_new_type_integer(2);
4833 oberon_generator_init_type(ctx
, ctx
-> shortint_type
);
4835 ctx
-> int_type
= oberon_new_type_integer(4);
4836 oberon_generator_init_type(ctx
, ctx
-> int_type
);
4838 ctx
-> longint_type
= oberon_new_type_integer(8);
4839 oberon_generator_init_type(ctx
, ctx
-> longint_type
);
4841 ctx
-> real_type
= oberon_new_type_real(4);
4842 oberon_generator_init_type(ctx
, ctx
-> real_type
);
4844 ctx
-> longreal_type
= oberon_new_type_real(8);
4845 oberon_generator_init_type(ctx
, ctx
-> longreal_type
);
4847 ctx
-> set_type
= oberon_new_type_set(4);
4848 oberon_generator_init_type(ctx
, ctx
-> set_type
);
4850 ctx
-> system_byte_type
= oberon_new_type_ptr(OBERON_TYPE_SYSTEM_BYTE
);
4851 oberon_generator_init_type(ctx
, ctx
-> system_byte_type
);
4853 ctx
-> system_ptr_type
= oberon_new_type_ptr(OBERON_TYPE_SYSTEM_PTR
);
4854 oberon_generator_init_type(ctx
, ctx
-> system_ptr_type
);
4856 /* LONG / SHORT support */
4857 ctx
-> byte_type
-> shorter
= NULL
;
4858 ctx
-> byte_type
-> longer
= ctx
-> shortint_type
;
4860 ctx
-> shortint_type
-> shorter
= ctx
-> byte_type
;
4861 ctx
-> shortint_type
-> longer
= ctx
-> int_type
;
4863 ctx
-> int_type
-> shorter
= ctx
-> shortint_type
;
4864 ctx
-> int_type
-> longer
= ctx
-> longint_type
;
4866 ctx
-> longint_type
-> shorter
= ctx
-> int_type
;
4867 ctx
-> longint_type
-> longer
= NULL
;
4869 ctx
-> real_type
-> shorter
= NULL
;
4870 ctx
-> real_type
-> longer
= ctx
-> longreal_type
;
4872 ctx
-> longreal_type
-> shorter
= ctx
-> real_type
;
4873 ctx
-> longreal_type
-> longer
= NULL
;
4877 oberon_new_intrinsic(oberon_context_t
* ctx
, char * name
, GenerateFuncCallback f
, GenerateProcCallback p
)
4879 oberon_object_t
* proc
;
4880 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, true, false, false);
4881 proc
-> type
= oberon_new_type_ptr(OBERON_TYPE_PROCEDURE
);
4882 proc
-> type
-> sysproc
= true;
4883 proc
-> type
-> genfunc
= f
;
4884 proc
-> type
-> genproc
= p
;
4887 static void oberon_new_intrinsic_type(oberon_context_t
* ctx
, char * name
, oberon_type_t
* type
)
4889 oberon_object_t
* id
;
4890 id
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, true, false, false);
4895 oberon_begin_intrinsic_module(oberon_context_t
* ctx
, char * name
, oberon_module_t
** m
)
4897 oberon_scope_t
* module_scope
;
4898 module_scope
= oberon_open_scope(ctx
);
4900 oberon_module_t
* module
;
4901 module
= GC_MALLOC(sizeof *module
);
4902 memset(module
, 0, sizeof *module
);
4903 module
-> name
= name
;
4904 module
-> intrinsic
= true;
4905 module
-> decl
= module_scope
;
4906 module
-> next
= ctx
-> module_list
;
4908 ctx
-> mod
= module
;
4909 ctx
-> module_list
= module
;
4915 oberon_end_intrinsic_module(oberon_context_t
* ctx
, oberon_module_t
* m
)
4917 oberon_close_scope(m
-> decl
);
4923 oberon_create_context(ModuleImportCallback import_module
)
4925 oberon_context_t
* ctx
= GC_MALLOC(sizeof *ctx
);
4926 memset(ctx
, 0, sizeof *ctx
);
4928 oberon_scope_t
* world_scope
;
4929 world_scope
= oberon_open_scope(ctx
);
4930 ctx
-> world_scope
= world_scope
;
4932 ctx
-> import_module
= import_module
;
4934 oberon_generator_init_context(ctx
);
4937 register_default_types(ctx
);
4940 oberon_new_const(ctx
, "TRUE", oberon_make_boolean(ctx
, true));
4941 oberon_new_const(ctx
, "FALSE", oberon_make_boolean(ctx
, false));
4944 oberon_new_intrinsic_type(ctx
, "BOOLEAN", ctx
-> bool_type
);
4945 oberon_new_intrinsic_type(ctx
, "CHAR", ctx
-> char_type
);
4946 oberon_new_intrinsic_type(ctx
, "SHORTINT", ctx
-> byte_type
);
4947 oberon_new_intrinsic_type(ctx
, "INTEGER", ctx
-> shortint_type
);
4948 oberon_new_intrinsic_type(ctx
, "LONGINT", ctx
-> int_type
);
4949 oberon_new_intrinsic_type(ctx
, "HUGEINT", ctx
-> longint_type
);
4950 oberon_new_intrinsic_type(ctx
, "REAL", ctx
-> real_type
);
4951 oberon_new_intrinsic_type(ctx
, "LONGREAL", ctx
-> longreal_type
);
4952 oberon_new_intrinsic_type(ctx
, "SET", ctx
-> set_type
);
4955 oberon_new_intrinsic(ctx
, "ABS", oberon_make_abs_call
, NULL
);
4956 oberon_new_intrinsic(ctx
, "ASH", oberon_make_ash_call
, NULL
);
4957 oberon_new_intrinsic(ctx
, "CAP", oberon_make_cap_call
, NULL
);
4958 oberon_new_intrinsic(ctx
, "CHR", oberon_make_chr_call
, NULL
);
4959 oberon_new_intrinsic(ctx
, "ENTIER", oberon_make_entier_call
, NULL
);
4960 oberon_new_intrinsic(ctx
, "LEN", oberon_make_len_call
, NULL
);
4961 oberon_new_intrinsic(ctx
, "LONG", oberon_make_long_call
, NULL
);
4962 oberon_new_intrinsic(ctx
, "MAX", oberon_make_max_call
, NULL
);
4963 oberon_new_intrinsic(ctx
, "MIN", oberon_make_min_call
, NULL
);
4964 oberon_new_intrinsic(ctx
, "ODD", oberon_make_odd_call
, NULL
);
4965 oberon_new_intrinsic(ctx
, "ORD", oberon_make_ord_call
, NULL
);
4966 oberon_new_intrinsic(ctx
, "SHORT", oberon_make_short_call
, NULL
);
4967 oberon_new_intrinsic(ctx
, "SIZE", oberon_make_size_call
, NULL
);
4970 oberon_new_intrinsic(ctx
, "ASSERT", NULL
, oberon_make_assert_call
);
4971 oberon_new_intrinsic(ctx
, "COPY", NULL
, oberon_make_copy_call
);
4972 oberon_new_intrinsic(ctx
, "DEC", NULL
, oberon_make_dec_call
);
4973 oberon_new_intrinsic(ctx
, "EXCL", NULL
, oberon_make_excl_call
);
4974 oberon_new_intrinsic(ctx
, "HALT", NULL
, oberon_make_halt_call
);
4975 oberon_new_intrinsic(ctx
, "INC", NULL
, oberon_make_inc_call
);
4976 oberon_new_intrinsic(ctx
, "INCL", NULL
, oberon_make_incl_call
);
4977 oberon_new_intrinsic(ctx
, "NEW", NULL
, oberon_make_new_call
);
4980 oberon_begin_intrinsic_module(ctx
, "SYSTEM", &ctx
-> system_module
);
4983 oberon_new_intrinsic_type(ctx
, "BYTE", ctx
-> system_byte_type
);
4984 oberon_new_intrinsic_type(ctx
, "PTR", ctx
-> system_ptr_type
);
4985 oberon_new_intrinsic_type(ctx
, "INT8", ctx
-> byte_type
);
4986 oberon_new_intrinsic_type(ctx
, "INT16", ctx
-> shortint_type
);
4987 oberon_new_intrinsic_type(ctx
, "INT32", ctx
-> int_type
);
4988 oberon_new_intrinsic_type(ctx
, "INT64", ctx
-> longint_type
);
4989 oberon_new_intrinsic_type(ctx
, "SET32", ctx
-> set_type
);
4992 oberon_new_intrinsic(ctx
, "CC", oberon_make_cc_call
, NULL
);
4993 oberon_new_intrinsic(ctx
, "LSH", oberon_make_lsh_call
, NULL
);
4994 oberon_new_intrinsic(ctx
, "ROT", oberon_make_rot_call
, NULL
);
4995 oberon_new_intrinsic(ctx
, "VAL", oberon_make_val_call
, NULL
);
4997 oberon_end_intrinsic_module(ctx
, ctx
-> system_module
);
5003 oberon_destroy_context(oberon_context_t
* ctx
)
5005 oberon_generator_destroy_context(ctx
);
5009 oberon_compile_module(oberon_context_t
* ctx
, oberon_scanner_t
* s
)
5011 const char * code
= ctx
-> code
;
5012 int code_index
= ctx
-> code_index
;
5013 oberon_location_t loc
= ctx
-> loc
;
5014 oberon_location_t xloc
= ctx
-> xloc
;
5016 int token
= ctx
-> token
;
5017 char * string
= ctx
-> string
;
5018 int integer
= ctx
-> integer
;
5019 int real
= ctx
-> real
;
5020 bool longmode
= ctx
-> longmode
;
5021 oberon_scope_t
* decl
= ctx
-> decl
;
5022 oberon_module_t
* mod
= ctx
-> mod
;
5024 oberon_scope_t
* module_scope
;
5025 module_scope
= oberon_open_scope(ctx
);
5027 oberon_module_t
* module
;
5028 module
= GC_MALLOC(sizeof *module
);
5029 memset(module
, 0, sizeof *module
);
5030 module
-> decl
= module_scope
;
5031 module
-> next
= ctx
-> module_list
;
5033 ctx
-> mod
= module
;
5034 ctx
-> module_list
= module
;
5036 oberon_init_scaner(ctx
, s
);
5037 oberon_parse_module(ctx
);
5039 module
-> ready
= 1;
5042 ctx
-> code_index
= code_index
;
5046 ctx
-> token
= token
;
5047 ctx
-> string
= string
;
5048 ctx
-> integer
= integer
;
5050 ctx
-> longmode
= longmode
;