cd7e97a18f3cb5531e77bd28d1253a62cdc92b85
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_create_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
)
311 oberon_object_t
* newvar
= GC_MALLOC(sizeof *newvar
);
312 memset(newvar
, 0, sizeof *newvar
);
313 newvar
-> name
= name
;
314 newvar
-> class = class;
315 newvar
-> export
= export
;
316 newvar
-> read_only
= read_only
;
317 newvar
-> local
= scope
-> local
;
318 newvar
-> parent
= scope
-> parent
;
319 newvar
-> parent_type
= scope
-> parent_type
;
320 newvar
-> module
= scope
-> ctx
-> mod
;
324 static oberon_object_t
*
325 oberon_define_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
, bool check_upscope
)
329 if(oberon_find_object(scope
-> up
, name
, false))
331 oberon_error(scope
-> ctx
, "already defined");
335 oberon_object_t
* x
= scope
-> list
;
336 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
343 oberon_error(scope
-> ctx
, "already defined");
346 oberon_object_t
* newvar
;
347 newvar
= oberon_create_object(scope
, name
, class, export
, read_only
);
353 // =======================================================================
355 // =======================================================================
358 oberon_get_char(oberon_context_t
* ctx
)
360 if(ctx
-> code
[ctx
-> code_index
])
362 ctx
-> code_index
+= 1;
363 ctx
-> xloc
.col
+= 1;
364 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
369 oberon_init_scaner(oberon_context_t
* ctx
, oberon_scanner_t
* s
)
371 ctx
-> code
= s
-> code
;
372 ctx
-> code_index
= 0;
373 ctx
-> xloc
.source
= s
-> source
;
374 ctx
-> xloc
.line
= 1;
376 ctx
-> loc
= ctx
-> xloc
;
377 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
381 oberon_read_ident(oberon_context_t
* ctx
)
383 int start
= ctx
-> code_index
;
385 oberon_get_char(ctx
);
386 while(isalnum(ctx
-> c
) || ctx
-> c
== '_')
388 oberon_get_char(ctx
);
391 int end
= ctx
-> code_index
;
393 char * ident
= GC_MALLOC(end
- start
+ 1);
394 memcpy(ident
, &ctx
-> code
[start
], end
- start
);
395 ident
[end
- start
] = 0;
397 ctx
-> string
= ident
;
398 ctx
-> token
= IDENT
;
400 if(strcmp(ident
, "MODULE") == 0)
402 ctx
-> token
= MODULE
;
404 else if(strcmp(ident
, "END") == 0)
408 else if(strcmp(ident
, "VAR") == 0)
412 else if(strcmp(ident
, "BEGIN") == 0)
414 ctx
-> token
= BEGIN
;
416 else if(strcmp(ident
, "OR") == 0)
420 else if(strcmp(ident
, "DIV") == 0)
424 else if(strcmp(ident
, "MOD") == 0)
428 else if(strcmp(ident
, "PROCEDURE") == 0)
430 ctx
-> token
= PROCEDURE
;
432 else if(strcmp(ident
, "RETURN") == 0)
434 ctx
-> token
= RETURN
;
436 else if(strcmp(ident
, "CONST") == 0)
438 ctx
-> token
= CONST
;
440 else if(strcmp(ident
, "TYPE") == 0)
444 else if(strcmp(ident
, "ARRAY") == 0)
446 ctx
-> token
= ARRAY
;
448 else if(strcmp(ident
, "OF") == 0)
452 else if(strcmp(ident
, "RECORD") == 0)
454 ctx
-> token
= RECORD
;
456 else if(strcmp(ident
, "POINTER") == 0)
458 ctx
-> token
= POINTER
;
460 else if(strcmp(ident
, "TO") == 0)
464 else if(strcmp(ident
, "NIL") == 0)
468 else if(strcmp(ident
, "IMPORT") == 0)
470 ctx
-> token
= IMPORT
;
472 else if(strcmp(ident
, "IN") == 0)
476 else if(strcmp(ident
, "IS") == 0)
480 else if(strcmp(ident
, "IF") == 0)
484 else if(strcmp(ident
, "THEN") == 0)
488 else if(strcmp(ident
, "ELSE") == 0)
492 else if(strcmp(ident
, "ELSIF") == 0)
494 ctx
-> token
= ELSIF
;
496 else if(strcmp(ident
, "WHILE") == 0)
498 ctx
-> token
= WHILE
;
500 else if(strcmp(ident
, "DO") == 0)
504 else if(strcmp(ident
, "REPEAT") == 0)
506 ctx
-> token
= REPEAT
;
508 else if(strcmp(ident
, "UNTIL") == 0)
510 ctx
-> token
= UNTIL
;
512 else if(strcmp(ident
, "FOR") == 0)
516 else if(strcmp(ident
, "BY") == 0)
520 else if(strcmp(ident
, "LOOP") == 0)
524 else if(strcmp(ident
, "EXIT") == 0)
528 else if(strcmp(ident
, "CASE") == 0)
532 else if(strcmp(ident
, "WITH") == 0)
538 #define ISHEXDIGIT(x) \
539 (((x) >= '0' && (x) <= '9') || ((x) >= 'A' && (x) <= 'F'))
542 oberon_read_number(oberon_context_t
* ctx
)
555 * mode = 3 == LONGREAL
559 start_i
= ctx
-> code_index
;
561 while(isdigit(ctx
-> c
))
563 oberon_get_char(ctx
);
566 end_i
= ctx
-> code_index
;
568 if(ISHEXDIGIT(ctx
-> c
))
571 while(ISHEXDIGIT(ctx
-> c
))
573 oberon_get_char(ctx
);
576 end_i
= ctx
-> code_index
;
581 oberon_get_char(ctx
);
583 else if(ctx
-> c
== 'X')
586 oberon_get_char(ctx
);
590 oberon_error(ctx
, "invalid hex number");
593 else if(ctx
-> c
== '.')
595 oberon_get_char(ctx
);
598 /* Чит: избегаем конфликта с DOTDOT */
599 ctx
-> code_index
-= 1;
605 while(isdigit(ctx
-> c
))
607 oberon_get_char(ctx
);
610 if(ctx
-> c
== 'E' || ctx
-> c
== 'D')
612 exp_i
= ctx
-> code_index
;
619 oberon_get_char(ctx
);
621 if(ctx
-> c
== '+' || ctx
-> c
== '-')
623 oberon_get_char(ctx
);
626 while(isdigit(ctx
-> c
))
628 oberon_get_char(ctx
);
632 end_i
= ctx
-> code_index
;
640 oberon_get_char(ctx
);
642 else if(ctx
-> c
== 'X')
645 oberon_get_char(ctx
);
649 int len
= end_i
- start_i
;
650 ident
= GC_MALLOC(len
+ 1);
651 memcpy(ident
, &ctx
-> code
[start_i
], len
);
654 ctx
-> longmode
= false;
657 int i
= exp_i
- start_i
;
659 ctx
-> longmode
= true;
665 integer
= atol(ident
);
667 ctx
-> token
= INTEGER
;
670 sscanf(ident
, "%lx", &integer
);
672 ctx
-> token
= INTEGER
;
676 sscanf(ident
, "%lf", &real
);
681 sscanf(ident
, "%lx", &integer
);
686 oberon_error(ctx
, "oberon_read_number: wat");
690 ctx
-> string
= ident
;
691 ctx
-> integer
= integer
;
696 oberon_get_lined_char(oberon_context_t
* ctx
)
702 oberon_get_char(ctx
);
705 oberon_get_char(ctx
);
707 ctx
-> xloc
.line
+= 1;
710 else if(ctx
-> c
== 0xA)
712 oberon_get_char(ctx
);
713 ctx
-> xloc
.line
+= 1;
718 oberon_get_char(ctx
);
720 } while(ctx
-> c
== 0xD || ctx
-> c
== 0xA);
724 oberon_skip_space(oberon_context_t
* ctx
)
726 while(isspace(ctx
-> c
))
728 oberon_get_lined_char(ctx
);
733 oberon_read_comment(oberon_context_t
* ctx
)
740 oberon_get_lined_char(ctx
);
743 oberon_get_lined_char(ctx
);
747 else if(ctx
-> c
== '*')
749 oberon_get_lined_char(ctx
);
752 oberon_get_lined_char(ctx
);
756 else if(ctx
-> c
== 0)
758 oberon_error(ctx
, "unterminated comment");
762 oberon_get_lined_char(ctx
);
767 static void oberon_read_string(oberon_context_t
* ctx
)
770 oberon_get_char(ctx
);
772 int start
= ctx
-> code_index
;
774 while(ctx
-> c
!= 0 && ctx
-> c
!= c
)
776 oberon_get_char(ctx
);
781 oberon_error(ctx
, "unterminated string");
784 int end
= ctx
-> code_index
;
786 oberon_get_char(ctx
);
788 char * string
= GC_MALLOC(end
- start
+ 1);
789 strncpy(string
, &ctx
-> code
[start
], end
- start
);
790 string
[end
- start
] = 0;
792 ctx
-> token
= STRING
;
793 ctx
-> string
= string
;
794 ctx
-> integer
= string
[0];
797 static void oberon_read_token(oberon_context_t
* ctx
);
800 oberon_read_symbol(oberon_context_t
* ctx
)
809 ctx
-> token
= SEMICOLON
;
810 oberon_get_char(ctx
);
813 ctx
-> token
= COLON
;
814 oberon_get_char(ctx
);
817 ctx
-> token
= ASSIGN
;
818 oberon_get_char(ctx
);
823 oberon_get_char(ctx
);
826 ctx
-> token
= DOTDOT
;
827 oberon_get_char(ctx
);
831 ctx
-> token
= LPAREN
;
832 oberon_get_char(ctx
);
835 oberon_get_char(ctx
);
836 oberon_read_comment(ctx
);
837 oberon_read_token(ctx
);
841 ctx
-> token
= RPAREN
;
842 oberon_get_char(ctx
);
845 ctx
-> token
= EQUAL
;
846 oberon_get_char(ctx
);
850 oberon_get_char(ctx
);
854 oberon_get_char(ctx
);
858 oberon_get_char(ctx
);
862 ctx
-> token
= GREAT
;
863 oberon_get_char(ctx
);
867 oberon_get_char(ctx
);
872 oberon_get_char(ctx
);
875 ctx
-> token
= MINUS
;
876 oberon_get_char(ctx
);
880 oberon_get_char(ctx
);
883 oberon_get_char(ctx
);
884 oberon_error(ctx
, "unstarted comment");
888 ctx
-> token
= SLASH
;
889 oberon_get_char(ctx
);
893 oberon_get_char(ctx
);
897 oberon_get_char(ctx
);
900 ctx
-> token
= COMMA
;
901 oberon_get_char(ctx
);
904 ctx
-> token
= LBRACK
;
905 oberon_get_char(ctx
);
908 ctx
-> token
= RBRACK
;
909 oberon_get_char(ctx
);
912 ctx
-> token
= UPARROW
;
913 oberon_get_char(ctx
);
916 oberon_read_string(ctx
);
919 oberon_read_string(ctx
);
922 ctx
-> token
= LBRACE
;
923 oberon_get_char(ctx
);
926 ctx
-> token
= RBRACE
;
927 oberon_get_char(ctx
);
931 oberon_get_char(ctx
);
934 oberon_error(ctx
, "invalid char %c", ctx
-> c
);
940 oberon_read_token(oberon_context_t
* ctx
)
942 oberon_skip_space(ctx
);
944 ctx
-> loc
= ctx
-> xloc
;
947 if(isalpha(c
) || c
== '_')
949 oberon_read_ident(ctx
);
953 oberon_read_number(ctx
);
957 oberon_read_symbol(ctx
);
961 // =======================================================================
963 // =======================================================================
965 static void oberon_expect_token(oberon_context_t
* ctx
, int token
);
966 static oberon_expr_t
* oberon_expr(oberon_context_t
* ctx
);
967 static void oberon_assert_token(oberon_context_t
* ctx
, int token
);
968 static char * oberon_assert_ident(oberon_context_t
* ctx
);
969 static void oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
);
970 static oberon_item_t
* oberon_const_expr(oberon_context_t
* ctx
);
971 static oberon_expr_t
* oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
);
972 static bool oberon_is_const(oberon_expr_t
* expr
);
974 static oberon_expr_t
*
975 oberon_make_unary_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
)
977 oberon_expr_t
* expr
;
978 oberon_type_t
* result
;
980 result
= a
-> result
;
984 if(result
-> class == OBERON_TYPE_SET
)
986 if(oberon_is_const(a
))
988 expr
= oberon_make_set(ctx
, ~(a
-> item
.integer
));
992 expr
= oberon_new_operator(OP_COMPLEMENTATION
, result
, a
, NULL
);
995 else if(result
-> class == OBERON_TYPE_INTEGER
)
997 if(oberon_is_const(a
))
999 expr
= oberon_make_integer(ctx
, -(a
-> item
.integer
));
1003 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
1006 else if(result
-> class == OBERON_TYPE_REAL
)
1008 if(oberon_is_const(a
))
1010 expr
= oberon_make_real_typed(ctx
, -(a
-> item
.real
), result
);
1014 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
1019 oberon_error(ctx
, "incompatible operator type");
1022 else if(token
== NOT
)
1024 if(result
-> class != OBERON_TYPE_BOOLEAN
)
1026 oberon_error(ctx
, "incompatible operator type");
1029 if(oberon_is_const(a
))
1031 expr
= oberon_make_boolean(ctx
, !(a
-> item
.integer
));
1035 expr
= oberon_new_operator(OP_LOGIC_NOT
, result
, a
, NULL
);
1040 oberon_error(ctx
, "oberon_make_unary_op: wat");
1047 oberon_expr_list(oberon_context_t
* ctx
, int * num_expr
, oberon_expr_t
** first
, int const_expr
)
1049 oberon_expr_t
* last
;
1054 *first
= last
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1058 *first
= last
= oberon_expr(ctx
);
1060 while(ctx
-> token
== COMMA
)
1062 oberon_assert_token(ctx
, COMMA
);
1063 oberon_expr_t
* current
;
1067 current
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1071 current
= oberon_expr(ctx
);
1074 last
-> next
= current
;
1080 static oberon_expr_t
*
1081 oberon_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1083 oberon_expr_t
* cast
;
1085 if((oberon_is_char_type(pref
) && oberon_is_const_string(expr
) && strlen(expr
-> item
.string
) == 1))
1087 /* Автоматически преобразуем строку единичного размера в символ */
1088 cast
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
1089 cast
-> item
.integer
= expr
-> item
.string
[0];
1091 else if(oberon_is_record_type(pref
) || oberon_is_pointer_to_record(pref
))
1093 assert(expr
-> is_item
);
1094 cast
= oberon_new_item(MODE_AS
, pref
, expr
-> read_only
);
1095 cast
-> item
.parent
= (oberon_item_t
*) expr
;
1097 else if(!oberon_is_some_types(expr
-> result
, pref
))
1099 cast
= oberon_new_operator(OP_CAST
, pref
, expr
, NULL
);
1109 static oberon_expr_t
*
1110 oberon_hard_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1112 return oberon_new_operator(OP_HARDCAST
, pref
, expr
, NULL
);
1116 oberon_check_dst(oberon_context_t
* ctx
, oberon_expr_t
* dst
)
1118 if(dst
-> read_only
)
1120 oberon_error(ctx
, "read-only destination");
1123 if(dst
-> is_item
== false)
1125 oberon_error(ctx
, "not variable");
1128 switch(dst
-> item
.mode
)
1139 oberon_error(ctx
, "not variable");
1145 oberon_check_src(oberon_context_t
* ctx
, oberon_expr_t
* src
)
1149 if(src
-> item
.mode
== MODE_TYPE
)
1151 oberon_error(ctx
, "not variable");
1157 oberon_autocast_call(oberon_context_t
* ctx
, oberon_item_t
* desig
)
1159 if(desig
-> mode
!= MODE_CALL
)
1161 oberon_error(ctx
, "expected mode CALL");
1164 oberon_type_t
* fn
= desig
-> parent
-> result
;
1165 int num_args
= desig
-> num_args
;
1166 int num_decl
= fn
-> num_decl
;
1168 if(num_args
< num_decl
)
1170 oberon_error(ctx
, "too few arguments");
1172 else if(num_args
> num_decl
)
1174 oberon_error(ctx
, "too many arguments");
1177 /* Делаем проверку на запись и делаем автокаст */
1178 oberon_expr_t
* casted
[num_args
];
1179 oberon_expr_t
* arg
= desig
-> args
;
1180 oberon_object_t
* param
= fn
-> decl
;
1181 for(int i
= 0; i
< num_args
; i
++)
1183 if(param
-> class == OBERON_CLASS_VAR_PARAM
)
1185 oberon_check_dst(ctx
, arg
);
1186 if(!oberon_is_compatible_arrays(param
, arg
))
1188 oberon_check_compatible_var_param(ctx
, param
-> type
, arg
-> result
);
1191 //casted[i] = oberon_cast_expr(ctx, arg, param -> type);
1195 oberon_check_src(ctx
, arg
);
1196 if(!oberon_is_compatible_arrays(param
, arg
))
1198 oberon_check_assignment_compatible(ctx
, arg
, param
-> type
);
1200 casted
[i
] = oberon_cast_expr(ctx
, arg
, param
-> type
);
1204 param
= param
-> next
;
1207 /* Создаём новый список выражений */
1211 for(int i
= 0; i
< num_args
- 1; i
++)
1213 casted
[i
] -> next
= casted
[i
+ 1];
1215 desig
-> args
= arg
;
1219 static oberon_expr_t
*
1220 oberon_make_call_func(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1222 oberon_type_t
* signature
= item
-> result
;
1223 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1225 oberon_error(ctx
, "not a procedure");
1228 oberon_expr_t
* call
;
1230 if(signature
-> sysproc
)
1232 if(signature
-> genfunc
== NULL
)
1234 oberon_error(ctx
, "not a function-procedure");
1237 call
= signature
-> genfunc(ctx
, num_args
, list_args
);
1241 if(signature
-> base
-> class == OBERON_TYPE_NOTYPE
)
1243 oberon_error(ctx
, "attempt to call procedure in expression");
1246 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1247 call
-> item
.parent
= item
;
1248 call
-> item
.num_args
= num_args
;
1249 call
-> item
.args
= list_args
;
1250 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1257 oberon_make_call_proc(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1259 oberon_type_t
* signature
= item
-> result
;
1260 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1262 oberon_error(ctx
, "not a procedure");
1265 oberon_expr_t
* call
;
1267 if(signature
-> sysproc
)
1269 if(signature
-> genproc
== NULL
)
1271 oberon_error(ctx
, "not a procedure");
1274 signature
-> genproc(ctx
, num_args
, list_args
);
1278 if(signature
-> base
-> class != OBERON_TYPE_NOTYPE
)
1280 oberon_error(ctx
, "attempt to call function as non-typed procedure");
1283 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1284 call
-> item
.parent
= item
;
1285 call
-> item
.num_args
= num_args
;
1286 call
-> item
.args
= list_args
;
1287 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1288 oberon_generate_call_proc(ctx
, call
);
1296 || ((x) == INTEGER) \
1299 || ((x) == STRING) \
1301 || ((x) == LBRACE) \
1302 || ((x) == LPAREN) \
1305 static oberon_expr_t
*
1306 oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1308 if(expr
-> result
-> class != OBERON_TYPE_POINTER
)
1310 oberon_error(ctx
, "not a pointer");
1313 assert(expr
-> is_item
);
1315 oberon_expr_t
* selector
;
1316 selector
= oberon_new_item(MODE_DEREF
, expr
-> result
-> base
, false);
1317 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1322 static oberon_expr_t
*
1323 oberon_make_array_selector(oberon_context_t
* ctx
, oberon_expr_t
* desig
, oberon_expr_t
* index
)
1325 if(desig
-> result
-> class == OBERON_TYPE_POINTER
)
1327 desig
= oberno_make_dereferencing(ctx
, desig
);
1330 assert(desig
-> is_item
);
1332 if(desig
-> result
-> class != OBERON_TYPE_ARRAY
)
1334 oberon_error(ctx
, "not array");
1337 oberon_type_t
* base
;
1338 base
= desig
-> result
-> base
;
1340 if(index
-> result
-> class != OBERON_TYPE_INTEGER
)
1342 oberon_error(ctx
, "index must be integer");
1345 // Статическая проверка границ массива
1346 if(desig
-> result
-> size
!= 0)
1348 if(index
-> is_item
)
1350 if(index
-> item
.mode
== MODE_INTEGER
)
1352 int arr_size
= desig
-> result
-> size
;
1353 int index_int
= index
-> item
.integer
;
1354 if(index_int
< 0 || index_int
> arr_size
- 1)
1356 oberon_error(ctx
, "not in range (dimension size 0..%i)", arr_size
- 1);
1362 oberon_expr_t
* selector
;
1363 selector
= oberon_new_item(MODE_INDEX
, base
, desig
-> read_only
);
1364 selector
-> item
.parent
= (oberon_item_t
*) desig
;
1365 selector
-> item
.num_args
= 1;
1366 selector
-> item
.args
= index
;
1371 static oberon_expr_t
*
1372 oberon_make_record_selector(oberon_context_t
* ctx
, oberon_expr_t
* expr
, char * name
)
1374 if(expr
-> result
-> class == OBERON_TYPE_POINTER
)
1376 expr
= oberno_make_dereferencing(ctx
, expr
);
1379 assert(expr
-> is_item
);
1381 if(expr
-> result
-> class != OBERON_TYPE_RECORD
)
1383 oberon_error(ctx
, "not record");
1386 oberon_type_t
* rec
= expr
-> result
;
1388 oberon_object_t
* field
;
1389 field
= oberon_find_object(rec
-> scope
, name
, true);
1391 if(field
-> export
== 0)
1393 if(field
-> module
!= ctx
-> mod
)
1395 oberon_error(ctx
, "field not exported");
1399 int read_only
= expr
-> read_only
;
1400 if(field
-> read_only
)
1402 if(field
-> module
!= ctx
-> mod
)
1408 oberon_expr_t
* selector
;
1409 selector
= oberon_new_item(MODE_FIELD
, field
-> type
, read_only
);
1410 selector
-> item
.var
= field
;
1411 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1416 #define ISSELECTOR(x) \
1419 || ((x) == UPARROW) \
1422 static oberon_object_t
*
1423 oberon_qualident(oberon_context_t
* ctx
, char ** xname
, int check
)
1426 oberon_object_t
* x
;
1428 name
= oberon_assert_ident(ctx
);
1429 x
= oberon_find_object(ctx
-> decl
, name
, check
);
1433 if(x
-> class == OBERON_CLASS_MODULE
)
1435 oberon_assert_token(ctx
, DOT
);
1436 name
= oberon_assert_ident(ctx
);
1437 /* Наличие объектов в левых модулях всегда проверяется */
1438 x
= oberon_find_object(x
-> module
-> decl
, name
, 1);
1440 if(x
-> export
== 0)
1442 oberon_error(ctx
, "not exported");
1455 static oberon_expr_t
*
1456 oberon_ident_item(oberon_context_t
* ctx
, char * name
)
1459 oberon_object_t
* x
;
1460 oberon_expr_t
* expr
;
1462 x
= oberon_find_object(ctx
-> decl
, name
, true);
1465 if(x
-> class == OBERON_CLASS_CONST
|| x
-> class == OBERON_CLASS_PROC
)
1470 expr
= oberon_new_item(MODE_VAR
, x
-> type
, read_only
);
1471 expr
-> item
.var
= x
;
1475 static oberon_expr_t
*
1476 oberon_qualident_expr(oberon_context_t
* ctx
)
1478 oberon_object_t
* var
;
1479 oberon_expr_t
* expr
;
1481 var
= oberon_qualident(ctx
, NULL
, 1);
1484 if(var
-> read_only
)
1486 if(var
-> module
!= ctx
-> mod
)
1492 switch(var
-> class)
1494 case OBERON_CLASS_CONST
:
1496 expr
= (oberon_expr_t
*) var
-> value
;
1498 case OBERON_CLASS_TYPE
:
1499 expr
= oberon_new_item(MODE_TYPE
, var
-> type
, read_only
);
1501 case OBERON_CLASS_VAR
:
1502 case OBERON_CLASS_VAR_PARAM
:
1503 case OBERON_CLASS_PARAM
:
1504 expr
= oberon_new_item(MODE_VAR
, var
-> type
, read_only
);
1506 case OBERON_CLASS_PROC
:
1507 expr
= oberon_new_item(MODE_VAR
, var
-> type
, true);
1510 oberon_error(ctx
, "invalid designator");
1514 expr
-> item
.var
= var
;
1519 static oberon_expr_t
*
1520 oberon_designator(oberon_context_t
* ctx
)
1523 oberon_expr_t
* expr
;
1524 oberon_object_t
* objtype
;
1526 expr
= oberon_qualident_expr(ctx
);
1528 while(expr
-> result
-> class != OBERON_TYPE_PROCEDURE
&& ISSELECTOR(ctx
-> token
))
1530 switch(ctx
-> token
)
1533 oberon_assert_token(ctx
, DOT
);
1534 name
= oberon_assert_ident(ctx
);
1535 expr
= oberon_make_record_selector(ctx
, expr
, name
);
1538 oberon_assert_token(ctx
, LBRACK
);
1539 int num_indexes
= 0;
1540 oberon_expr_t
* indexes
= NULL
;
1541 oberon_expr_list(ctx
, &num_indexes
, &indexes
, 0);
1542 oberon_assert_token(ctx
, RBRACK
);
1544 for(int i
= 0; i
< num_indexes
; i
++)
1546 expr
= oberon_make_array_selector(ctx
, expr
, indexes
);
1547 indexes
= indexes
-> next
;
1551 oberon_assert_token(ctx
, UPARROW
);
1552 expr
= oberno_make_dereferencing(ctx
, expr
);
1555 oberon_assert_token(ctx
, LPAREN
);
1556 objtype
= oberon_qualident(ctx
, NULL
, true);
1557 oberon_assert_token(ctx
, RPAREN
);
1558 oberon_check_extension_of(ctx
, expr
-> result
, objtype
-> type
);
1559 expr
= oberon_cast_expr(ctx
, expr
, objtype
-> type
);
1562 oberon_error(ctx
, "oberon_designator: wat");
1570 static oberon_expr_t
*
1571 oberon_opt_func_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1573 /* Если есть скобки - значит вызов. Если нет, то передаём указатель. */
1574 if(ctx
-> token
== LPAREN
)
1576 oberon_assert_token(ctx
, LPAREN
);
1579 oberon_expr_t
* arguments
= NULL
;
1581 if(ISEXPR(ctx
-> token
))
1583 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1586 assert(expr
-> is_item
== 1);
1587 expr
= oberon_make_call_func(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1589 oberon_assert_token(ctx
, RPAREN
);
1596 oberon_opt_proc_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1598 assert(expr
-> is_item
);
1601 oberon_expr_t
* arguments
= NULL
;
1603 if(ctx
-> token
== LPAREN
)
1605 oberon_assert_token(ctx
, LPAREN
);
1607 if(ISEXPR(ctx
-> token
))
1609 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1612 oberon_assert_token(ctx
, RPAREN
);
1615 /* Вызов происходит даже без скобок */
1616 oberon_make_call_proc(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1619 static oberon_expr_t
*
1620 oberon_element(oberon_context_t
* ctx
)
1625 e1
= oberon_expr(ctx
);
1626 oberon_check_src(ctx
, e1
);
1627 if(e1
-> result
-> class != OBERON_TYPE_INTEGER
)
1629 oberon_error(ctx
, "expected integer");
1633 if(ctx
-> token
== DOTDOT
)
1635 oberon_assert_token(ctx
, DOTDOT
);
1636 e2
= oberon_expr(ctx
);
1637 oberon_check_src(ctx
, e2
);
1638 if(e2
-> result
-> class != OBERON_TYPE_INTEGER
)
1640 oberon_error(ctx
, "expected integer");
1644 oberon_expr_t
* set
;
1645 if(e2
== NULL
&& oberon_is_const(e1
))
1647 set
= oberon_make_set_index(ctx
, e1
-> item
.integer
);
1649 else if(e2
!= NULL
&& oberon_is_const(e1
) && oberon_is_const(e2
))
1651 set
= oberon_make_set_range(ctx
, e1
-> item
.integer
, e2
-> item
.integer
);
1655 set
= oberon_new_operator(OP_RANGE
, ctx
-> set_type
, e1
, e2
);
1660 static oberon_expr_t
*
1661 oberon_make_set_union(oberon_context_t
* ctx
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1663 if(oberon_is_const(a
) && oberon_is_const(b
))
1665 return oberon_make_set(ctx
, (a
-> item
.integer
| b
-> item
.integer
));
1669 return oberon_new_operator(OP_UNION
, ctx
-> set_type
, a
, b
);
1673 static oberon_expr_t
*
1674 oberon_set(oberon_context_t
* ctx
)
1676 oberon_expr_t
* set
;
1677 oberon_expr_t
* elements
;
1678 set
= oberon_make_set(ctx
, 0);
1680 oberon_assert_token(ctx
, LBRACE
);
1681 if(ISEXPR(ctx
-> token
))
1683 elements
= oberon_element(ctx
);
1684 set
= oberon_make_set_union(ctx
, set
, elements
);
1685 while(ctx
-> token
== COMMA
)
1687 oberon_assert_token(ctx
, COMMA
);
1688 elements
= oberon_element(ctx
);
1689 set
= oberon_make_set_union(ctx
, set
, elements
);
1692 oberon_assert_token(ctx
, RBRACE
);
1697 static oberon_expr_t
*
1698 oberon_factor(oberon_context_t
* ctx
)
1700 oberon_expr_t
* expr
;
1701 oberon_type_t
* result
;
1703 switch(ctx
-> token
)
1706 expr
= oberon_designator(ctx
);
1707 expr
= oberon_opt_func_parens(ctx
, expr
);
1710 expr
= oberon_make_integer(ctx
, ctx
-> integer
);
1711 oberon_assert_token(ctx
, INTEGER
);
1714 result
= ctx
-> char_type
;
1715 expr
= oberon_new_item(MODE_CHAR
, result
, true);
1716 expr
-> item
.integer
= ctx
-> integer
;
1717 oberon_assert_token(ctx
, CHAR
);
1720 expr
= oberon_make_string(ctx
, ctx
-> string
);
1721 oberon_assert_token(ctx
, STRING
);
1724 expr
= oberon_make_real(ctx
, ctx
-> real
, ctx
-> longmode
);
1725 oberon_assert_token(ctx
, REAL
);
1728 expr
= oberon_set(ctx
);
1731 oberon_assert_token(ctx
, LPAREN
);
1732 expr
= oberon_expr(ctx
);
1733 oberon_assert_token(ctx
, RPAREN
);
1736 oberon_assert_token(ctx
, NOT
);
1737 expr
= oberon_factor(ctx
);
1738 expr
= oberon_make_unary_op(ctx
, NOT
, expr
);
1741 oberon_assert_token(ctx
, NIL
);
1742 expr
= oberon_new_item(MODE_NIL
, ctx
-> nil_type
, true);
1745 oberon_error(ctx
, "invalid expression");
1751 static oberon_expr_t
*
1752 oberon_make_bin_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1754 oberon_expr_t
* expr
;
1755 oberon_type_t
* result
;
1757 oberon_check_compatible_bin_expr(ctx
, token
, a
, b
);
1758 oberon_check_src(ctx
, a
);
1761 oberon_check_src(ctx
, b
);
1766 if(oberon_is_const(a
) && oberon_is_const(b
))
1768 expr
= oberon_make_boolean(ctx
, (1 << a
-> item
.integer
) & b
-> item
.integer
);
1772 expr
= oberon_new_operator(OP_IN
, ctx
-> bool_type
, a
, b
);
1775 else if(token
== IS
)
1777 oberon_check_type_expr(ctx
, b
);
1778 expr
= oberon_new_operator(OP_IS
, ctx
-> bool_type
, a
, b
);
1780 else if((token
>= EQUAL
&& token
<= GEQ
) || token
== OR
|| token
== AND
)
1782 if(oberon_is_string_of_one(a
) && oberon_is_char_type(b
-> result
))
1784 result
= b
-> result
;
1786 else if(oberon_is_string_of_one(b
) && oberon_is_char_type(a
-> result
))
1788 result
= a
-> result
;
1790 else if(oberon_is_string_of_one(a
) && oberon_is_string_of_one(b
))
1792 result
= ctx
-> char_type
;
1796 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1799 if(oberon_is_const(a
) && oberon_is_const(b
)
1800 && (oberon_is_real_type(result
) || oberon_is_integer_type(result
)))
1802 if(oberon_is_real_type(result
))
1804 double x
= a
-> item
.real
;
1805 double y
= b
-> item
.real
;
1808 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1809 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1810 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1811 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1812 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1813 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1814 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1815 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1816 default: assert(0); break;
1819 else if(oberon_is_integer_type(result
))
1821 int64_t x
= a
-> item
.integer
;
1822 int64_t y
= b
-> item
.integer
;
1825 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1826 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1827 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1828 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1829 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1830 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1831 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1832 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1833 default: assert(0); break;
1843 a
= oberon_cast_expr(ctx
, a
, result
);
1844 b
= oberon_cast_expr(ctx
, b
, result
);
1845 result
= ctx
-> bool_type
;
1848 case EQUAL
: expr
= oberon_new_operator(OP_EQ
, result
, a
, b
); break;
1849 case NEQ
: expr
= oberon_new_operator(OP_NEQ
, result
, a
, b
); break;
1850 case LESS
: expr
= oberon_new_operator(OP_LSS
, result
, a
, b
); break;
1851 case LEQ
: expr
= oberon_new_operator(OP_LEQ
, result
, a
, b
); break;
1852 case GREAT
: expr
= oberon_new_operator(OP_GRT
, result
, a
, b
); break;
1853 case GEQ
: expr
= oberon_new_operator(OP_GEQ
, result
, a
, b
); break;
1854 case OR
: expr
= oberon_new_operator(OP_LOGIC_OR
, result
, a
, b
); break;
1855 case AND
: expr
= oberon_new_operator(OP_LOGIC_AND
, result
, a
, b
); break;
1856 default: assert(0); break;
1860 else if(token
== SLASH
)
1862 if(oberon_is_set_type(a
-> result
) && oberon_is_set_type(b
-> result
))
1864 if(oberon_is_const(a
) && oberon_is_const(b
))
1866 int64_t x
= a
-> item
.integer
;
1867 int64_t y
= b
-> item
.integer
;
1868 expr
= oberon_make_set(ctx
, x
^ y
);
1872 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1873 a
= oberon_cast_expr(ctx
, a
, result
);
1874 b
= oberon_cast_expr(ctx
, b
, result
);
1875 expr
= oberon_new_operator(OP_SYM_DIFFERENCE
, result
, a
, b
);
1880 result
= oberon_get_longer_real_type(ctx
, a
-> result
, b
-> result
);
1881 if(oberon_is_const(a
) && oberon_is_const(b
))
1883 double x
= a
-> item
.real
;
1884 double y
= b
-> item
.real
;
1885 expr
= oberon_make_real_typed(ctx
, x
/ y
, result
);
1889 a
= oberon_cast_expr(ctx
, a
, result
);
1890 b
= oberon_cast_expr(ctx
, b
, result
);
1891 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
1897 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1899 if(oberon_is_const(a
) && oberon_is_const(b
))
1901 if(oberon_is_set_type(result
))
1903 int64_t x
= a
-> item
.integer
;
1904 int64_t y
= b
-> item
.integer
;
1907 case PLUS
: expr
= oberon_make_set(ctx
, x
| y
); break;
1908 case MINUS
: expr
= oberon_make_set(ctx
, x
& ~y
); break;
1909 case STAR
: expr
= oberon_make_set(ctx
, x
& y
); break;
1910 default: assert(0); break;
1913 if(oberon_is_real_type(result
))
1915 double x
= a
-> item
.real
;
1916 double y
= b
-> item
.real
;
1919 case PLUS
: expr
= oberon_make_real_typed(ctx
, x
+ y
, result
); break;
1920 case MINUS
: expr
= oberon_make_real_typed(ctx
, x
- y
, result
); break;
1921 case STAR
: expr
= oberon_make_real_typed(ctx
, x
* y
, result
); break;
1922 default: assert(0); break;
1925 else if(oberon_is_integer_type(result
))
1927 int64_t x
= a
-> item
.integer
;
1928 int64_t y
= b
-> item
.integer
;
1931 case PLUS
: expr
= oberon_make_integer(ctx
, x
+ y
); break;
1932 case MINUS
: expr
= oberon_make_integer(ctx
, x
- y
); break;
1933 case STAR
: expr
= oberon_make_integer(ctx
, x
* y
); break;
1934 case DIV
: expr
= oberon_make_integer(ctx
, x
/ y
); break;
1935 case MOD
: expr
= oberon_make_integer(ctx
, x
% y
); break;
1936 default: assert(0); break;
1946 a
= oberon_cast_expr(ctx
, a
, result
);
1947 b
= oberon_cast_expr(ctx
, b
, result
);
1950 if(oberon_is_set_type(result
))
1955 expr
= oberon_new_operator(OP_UNION
, result
, a
, b
);
1958 expr
= oberon_new_operator(OP_DIFFERENCE
, result
, a
, b
);
1961 expr
= oberon_new_operator(OP_INTERSECTION
, result
, a
, b
);
1968 else if(oberon_is_real_type(result
))
1973 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
1976 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
1979 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
1982 printf("token %i line %i\n", token
, ctx
-> loc
.line
);
1987 else if(oberon_is_integer_type(result
))
1992 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
1995 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
1998 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
2001 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
2004 expr
= oberon_new_operator(OP_MOD
, result
, a
, b
);
2007 printf("token %i line %i\n", token
, ctx
-> loc
.line
);
2022 #define ISMULOP(x) \
2023 ((x) >= STAR && (x) <= AND)
2025 static oberon_expr_t
*
2026 oberon_term_expr(oberon_context_t
* ctx
)
2028 oberon_expr_t
* expr
;
2030 expr
= oberon_factor(ctx
);
2031 while(ISMULOP(ctx
-> token
))
2033 int token
= ctx
-> token
;
2034 oberon_read_token(ctx
);
2036 oberon_expr_t
* inter
= oberon_factor(ctx
);
2037 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2043 #define ISADDOP(x) \
2044 ((x) >= PLUS && (x) <= OR)
2046 static oberon_expr_t
*
2047 oberon_simple_expr(oberon_context_t
* ctx
)
2049 oberon_expr_t
* expr
;
2052 if(ctx
-> token
== PLUS
)
2055 oberon_assert_token(ctx
, PLUS
);
2057 else if(ctx
-> token
== MINUS
)
2060 oberon_assert_token(ctx
, MINUS
);
2063 expr
= oberon_term_expr(ctx
);
2065 while(ISADDOP(ctx
-> token
))
2067 int token
= ctx
-> token
;
2068 oberon_read_token(ctx
);
2070 oberon_expr_t
* inter
= oberon_term_expr(ctx
);
2071 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2076 expr
= oberon_make_unary_op(ctx
, MINUS
, expr
);
2082 #define ISRELATION(x) \
2083 ((x) >= EQUAL && (x) <= IS)
2085 static oberon_expr_t
*
2086 oberon_expr(oberon_context_t
* ctx
)
2088 oberon_expr_t
* expr
;
2090 expr
= oberon_simple_expr(ctx
);
2091 while(ISRELATION(ctx
-> token
))
2093 int token
= ctx
-> token
;
2094 oberon_read_token(ctx
);
2096 oberon_expr_t
* inter
= oberon_simple_expr(ctx
);
2097 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2104 oberon_is_const(oberon_expr_t
* expr
)
2106 if(expr
-> is_item
== false)
2111 switch(expr
-> item
.mode
)
2133 oberon_check_const(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2135 if(!oberon_is_const(expr
))
2137 oberon_error(ctx
, "const expression are required");
2141 static oberon_item_t
*
2142 oberon_const_expr(oberon_context_t
* ctx
)
2144 oberon_expr_t
* expr
;
2145 expr
= oberon_expr(ctx
);
2146 oberon_check_const(ctx
, expr
);
2147 return (oberon_item_t
*) expr
;
2150 // =======================================================================
2152 // =======================================================================
2154 static void oberon_decl_seq(oberon_context_t
* ctx
);
2155 static void oberon_statement_seq(oberon_context_t
* ctx
);
2156 static void oberon_initialize_decl(oberon_context_t
* ctx
);
2159 oberon_expect_token(oberon_context_t
* ctx
, int token
)
2161 if(ctx
-> token
!= token
)
2163 oberon_error(ctx
, "unexpected token %i (%i)", ctx
-> token
, token
);
2168 oberon_assert_token(oberon_context_t
* ctx
, int token
)
2170 oberon_expect_token(ctx
, token
);
2171 oberon_read_token(ctx
);
2175 oberon_assert_ident(oberon_context_t
* ctx
)
2177 oberon_expect_token(ctx
, IDENT
);
2178 char * ident
= ctx
-> string
;
2179 oberon_read_token(ctx
);
2184 oberon_def(oberon_context_t
* ctx
, int * export
, int * read_only
)
2186 switch(ctx
-> token
)
2189 oberon_assert_token(ctx
, STAR
);
2194 oberon_assert_token(ctx
, MINUS
);
2205 static oberon_object_t
*
2206 oberon_ident_def(oberon_context_t
* ctx
, int class, bool check_upscope
)
2211 oberon_object_t
* x
;
2213 name
= oberon_assert_ident(ctx
);
2214 oberon_def(ctx
, &export
, &read_only
);
2216 x
= oberon_define_object(ctx
-> decl
, name
, class, export
, read_only
, check_upscope
);
2221 oberon_ident_list(oberon_context_t
* ctx
, int class, bool check_upscope
, int * num
, oberon_object_t
** list
)
2224 *list
= oberon_ident_def(ctx
, class, check_upscope
);
2225 while(ctx
-> token
== COMMA
)
2227 oberon_assert_token(ctx
, COMMA
);
2228 oberon_ident_def(ctx
, class, check_upscope
);
2234 oberon_var_decl(oberon_context_t
* ctx
)
2237 oberon_object_t
* list
;
2238 oberon_type_t
* type
;
2239 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2241 oberon_ident_list(ctx
, OBERON_CLASS_VAR
, false, &num
, &list
);
2242 oberon_assert_token(ctx
, COLON
);
2243 oberon_type(ctx
, &type
);
2245 oberon_object_t
* var
= list
;
2246 for(int i
= 0; i
< num
; i
++)
2253 static oberon_object_t
*
2254 oberon_fp_section(oberon_context_t
* ctx
, int * num_decl
)
2256 int class = OBERON_CLASS_PARAM
;
2257 if(ctx
-> token
== VAR
)
2259 oberon_read_token(ctx
);
2260 class = OBERON_CLASS_VAR_PARAM
;
2264 oberon_object_t
* list
;
2265 oberon_ident_list(ctx
, class, false, &num
, &list
);
2267 oberon_assert_token(ctx
, COLON
);
2269 oberon_type_t
* type
;
2270 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2271 oberon_type(ctx
, &type
);
2273 oberon_object_t
* param
= list
;
2274 for(int i
= 0; i
< num
; i
++)
2276 param
-> type
= type
;
2277 param
= param
-> next
;
2284 #define ISFPSECTION \
2285 ((ctx -> token == VAR) || (ctx -> token == IDENT))
2288 oberon_formal_pars(oberon_context_t
* ctx
, oberon_type_t
* signature
)
2290 oberon_assert_token(ctx
, LPAREN
);
2294 signature
-> decl
= oberon_fp_section(ctx
, &signature
-> num_decl
);
2295 while(ctx
-> token
== SEMICOLON
)
2297 oberon_assert_token(ctx
, SEMICOLON
);
2298 oberon_fp_section(ctx
, &signature
-> num_decl
);
2302 oberon_assert_token(ctx
, RPAREN
);
2304 if(ctx
-> token
== COLON
)
2306 oberon_assert_token(ctx
, COLON
);
2308 oberon_object_t
* typeobj
;
2309 typeobj
= oberon_qualident(ctx
, NULL
, 1);
2310 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2312 oberon_error(ctx
, "function result is not type");
2314 if(typeobj
-> type
-> class == OBERON_TYPE_RECORD
2315 || typeobj
-> type
-> class == OBERON_TYPE_ARRAY
)
2317 oberon_error(ctx
, "records or arrays could not be result of function");
2319 signature
-> base
= typeobj
-> type
;
2324 oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
)
2326 oberon_type_t
* signature
;
2328 signature
-> class = OBERON_TYPE_PROCEDURE
;
2329 signature
-> num_decl
= 0;
2330 signature
-> base
= ctx
-> notype_type
;
2331 signature
-> decl
= NULL
;
2333 if(ctx
-> token
== LPAREN
)
2335 oberon_formal_pars(ctx
, signature
);
2340 oberon_compare_signatures(oberon_context_t
* ctx
, oberon_type_t
* a
, oberon_type_t
* b
)
2342 if(a
-> num_decl
!= b
-> num_decl
)
2344 oberon_error(ctx
, "number parameters not matched");
2347 int num_param
= a
-> num_decl
;
2348 oberon_object_t
* param_a
= a
-> decl
;
2349 oberon_object_t
* param_b
= b
-> decl
;
2350 for(int i
= 0; i
< num_param
; i
++)
2352 if(strcmp(param_a
-> name
, param_b
-> name
) != 0)
2354 oberon_error(ctx
, "param %i name not matched", i
+ 1);
2357 if(param_a
-> type
!= param_b
-> type
)
2359 oberon_error(ctx
, "param %i type not matched", i
+ 1);
2362 param_a
= param_a
-> next
;
2363 param_b
= param_b
-> next
;
2368 oberon_make_return(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2370 oberon_object_t
* proc
= ctx
-> decl
-> parent
;
2371 oberon_type_t
* result_type
= proc
-> type
-> base
;
2373 if(result_type
-> class == OBERON_TYPE_NOTYPE
)
2377 oberon_error(ctx
, "procedure has no result type");
2384 oberon_error(ctx
, "procedure requires expression on result");
2387 oberon_check_src(ctx
, expr
);
2388 oberon_check_assignment_compatible(ctx
, expr
, result_type
);
2389 expr
= oberon_cast_expr(ctx
, expr
, result_type
);
2392 proc
-> has_return
= 1;
2394 oberon_generate_return(ctx
, expr
);
2398 oberon_proc_decl_body(oberon_context_t
* ctx
, oberon_object_t
* proc
)
2400 oberon_assert_token(ctx
, SEMICOLON
);
2402 ctx
-> decl
= proc
-> scope
;
2404 oberon_decl_seq(ctx
);
2406 oberon_generate_begin_proc(ctx
, proc
);
2408 if(ctx
-> token
== BEGIN
)
2410 oberon_assert_token(ctx
, BEGIN
);
2411 oberon_statement_seq(ctx
);
2414 oberon_assert_token(ctx
, END
);
2415 char * name
= oberon_assert_ident(ctx
);
2416 if(strcmp(name
, proc
-> name
) != 0)
2418 oberon_error(ctx
, "procedure name not matched");
2421 if(proc
-> type
-> base
-> class == OBERON_TYPE_NOTYPE
)
2423 oberon_make_return(ctx
, NULL
);
2426 if(proc
-> has_return
== 0)
2428 oberon_error(ctx
, "procedure requires return");
2431 oberon_generate_end_proc(ctx
);
2432 oberon_close_scope(ctx
-> decl
);
2436 oberon_proc_decl(oberon_context_t
* ctx
)
2438 oberon_assert_token(ctx
, PROCEDURE
);
2441 if(ctx
-> token
== UPARROW
)
2443 oberon_assert_token(ctx
, UPARROW
);
2451 if(ctx
-> token
== STAR
)
2453 oberon_assert_token(ctx
, STAR
);
2456 name
= oberon_assert_ident(ctx
);
2457 oberon_def(ctx
, &export
, &read_only
);
2459 oberon_scope_t
* proc_scope
;
2460 proc_scope
= oberon_open_scope(ctx
);
2461 ctx
-> decl
-> local
= 1;
2463 oberon_type_t
* signature
;
2464 signature
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2465 oberon_opt_formal_pars(ctx
, &signature
);
2467 //oberon_initialize_decl(ctx);
2468 oberon_generator_init_type(ctx
, signature
);
2469 oberon_close_scope(ctx
-> decl
);
2471 oberon_object_t
* proc
;
2472 proc
= oberon_find_object(ctx
-> decl
, name
, 0);
2475 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, export
, read_only
, false);
2476 proc
-> type
= signature
;
2477 proc
-> scope
= proc_scope
;
2478 oberon_generator_init_proc(ctx
, proc
);
2482 if(proc
-> class != OBERON_CLASS_PROC
)
2484 oberon_error(ctx
, "mult definition");
2491 oberon_error(ctx
, "mult procedure definition");
2495 if(proc
-> export
!= export
|| proc
-> read_only
!= read_only
)
2497 oberon_error(ctx
, "export type not matched");
2500 oberon_compare_signatures(ctx
, proc
-> type
, signature
);
2503 proc_scope
-> parent
= proc
;
2504 oberon_object_t
* param
= proc_scope
-> list
-> next
;
2507 param
-> parent
= proc
;
2508 param
= param
-> next
;
2514 oberon_proc_decl_body(ctx
, proc
);
2519 oberon_const_decl(oberon_context_t
* ctx
)
2521 oberon_item_t
* value
;
2522 oberon_object_t
* constant
;
2524 constant
= oberon_ident_def(ctx
, OBERON_CLASS_CONST
, false);
2525 oberon_assert_token(ctx
, EQUAL
);
2526 value
= oberon_const_expr(ctx
);
2527 constant
-> value
= value
;
2531 oberon_make_array_type(oberon_context_t
* ctx
, oberon_expr_t
* size
, oberon_type_t
* base
, oberon_type_t
** type
)
2533 if(size
-> is_item
== 0)
2535 oberon_error(ctx
, "requires constant");
2538 if(size
-> item
.mode
!= MODE_INTEGER
)
2540 oberon_error(ctx
, "requires integer constant");
2543 oberon_type_t
* arr
;
2545 arr
-> class = OBERON_TYPE_ARRAY
;
2546 arr
-> size
= size
-> item
.integer
;
2551 oberon_qualident_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2554 oberon_object_t
* to
;
2556 to
= oberon_qualident(ctx
, &name
, 0);
2558 //name = oberon_assert_ident(ctx);
2559 //to = oberon_find_object(ctx -> decl, name, 0);
2563 if(to
-> class != OBERON_CLASS_TYPE
)
2565 oberon_error(ctx
, "not a type");
2570 to
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, false, false, false);
2571 to
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2577 static void oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
);
2580 * Правило граматики "type". Указатель type должен указывать на существующий объект!
2584 oberon_make_multiarray(oberon_context_t
* ctx
, oberon_expr_t
* sizes
, oberon_type_t
* base
, oberon_type_t
** type
)
2592 oberon_type_t
* dim
;
2593 dim
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2595 oberon_make_multiarray(ctx
, sizes
-> next
, base
, &dim
);
2597 oberon_make_array_type(ctx
, sizes
, dim
, type
);
2601 oberon_make_open_array(oberon_context_t
* ctx
, oberon_type_t
* base
, oberon_type_t
* type
)
2603 type
-> class = OBERON_TYPE_ARRAY
;
2605 type
-> base
= base
;
2609 oberon_field_list(oberon_context_t
* ctx
, oberon_type_t
* rec
, oberon_scope_t
* modscope
)
2611 if(ctx
-> token
== IDENT
)
2614 oberon_object_t
* list
;
2615 oberon_type_t
* type
;
2616 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2618 oberon_ident_list(ctx
, OBERON_CLASS_FIELD
, true, &num
, &list
);
2619 oberon_assert_token(ctx
, COLON
);
2621 oberon_scope_t
* current
= ctx
-> decl
;
2622 ctx
-> decl
= modscope
;
2623 oberon_type(ctx
, &type
);
2624 ctx
-> decl
= current
;
2626 oberon_object_t
* field
= list
;
2627 for(int i
= 0; i
< num
; i
++)
2629 field
-> type
= type
;
2630 field
= field
-> next
;
2633 rec
-> num_decl
+= num
;
2638 oberon_type_record_body(oberon_context_t
* ctx
, oberon_type_t
* rec
)
2640 oberon_scope_t
* oldscope
= ctx
-> decl
;
2641 ctx
-> decl
= oldscope
;
2643 if(ctx
-> token
== LPAREN
)
2645 oberon_assert_token(ctx
, LPAREN
);
2647 oberon_object_t
* typeobj
;
2648 typeobj
= oberon_qualident(ctx
, NULL
, true);
2650 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2652 oberon_error(ctx
, "base must be type");
2655 oberon_type_t
* base
= typeobj
-> type
;
2656 if(base
-> class == OBERON_TYPE_POINTER
)
2658 base
= base
-> base
;
2661 if(base
-> class != OBERON_TYPE_RECORD
)
2663 oberon_error(ctx
, "base must be record type");
2667 ctx
-> decl
= base
-> scope
;
2669 oberon_assert_token(ctx
, RPAREN
);
2676 oberon_scope_t
* this_scope
;
2677 this_scope
= oberon_open_scope(ctx
);
2678 this_scope
-> local
= true;
2679 this_scope
-> parent
= NULL
;
2680 this_scope
-> parent_type
= rec
;
2682 oberon_field_list(ctx
, rec
, oldscope
);
2683 while(ctx
-> token
== SEMICOLON
)
2685 oberon_assert_token(ctx
, SEMICOLON
);
2686 oberon_field_list(ctx
, rec
, oldscope
);
2689 rec
-> scope
= this_scope
;
2690 rec
-> decl
= this_scope
-> list
-> next
;
2691 ctx
-> decl
= oldscope
;
2695 oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2697 if(ctx
-> token
== IDENT
)
2699 oberon_qualident_type(ctx
, type
);
2701 else if(ctx
-> token
== ARRAY
)
2703 oberon_assert_token(ctx
, ARRAY
);
2706 oberon_expr_t
* sizes
;
2708 if(ISEXPR(ctx
-> token
))
2710 oberon_expr_list(ctx
, &num_sizes
, &sizes
, 1);
2713 oberon_assert_token(ctx
, OF
);
2715 oberon_type_t
* base
;
2716 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2717 oberon_type(ctx
, &base
);
2721 oberon_make_open_array(ctx
, base
, *type
);
2725 oberon_make_multiarray(ctx
, sizes
, base
, type
);
2728 else if(ctx
-> token
== RECORD
)
2730 oberon_type_t
* rec
;
2732 rec
-> class = OBERON_TYPE_RECORD
;
2733 rec
-> module
= ctx
-> mod
;
2735 oberon_assert_token(ctx
, RECORD
);
2736 oberon_type_record_body(ctx
, rec
);
2737 oberon_assert_token(ctx
, END
);
2741 else if(ctx
-> token
== POINTER
)
2743 oberon_assert_token(ctx
, POINTER
);
2744 oberon_assert_token(ctx
, TO
);
2746 oberon_type_t
* base
;
2747 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2748 oberon_type(ctx
, &base
);
2750 oberon_type_t
* ptr
;
2752 ptr
-> class = OBERON_TYPE_POINTER
;
2755 else if(ctx
-> token
== PROCEDURE
)
2757 oberon_open_scope(ctx
);
2758 oberon_assert_token(ctx
, PROCEDURE
);
2759 oberon_opt_formal_pars(ctx
, type
);
2760 oberon_close_scope(ctx
-> decl
);
2764 oberon_error(ctx
, "invalid type declaration");
2769 oberon_type_decl(oberon_context_t
* ctx
)
2772 oberon_object_t
* newtype
;
2773 oberon_type_t
* type
;
2777 name
= oberon_assert_ident(ctx
);
2778 oberon_def(ctx
, &export
, &read_only
);
2780 newtype
= oberon_find_object(ctx
-> decl
, name
, 0);
2783 newtype
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, export
, read_only
, false);
2784 newtype
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2785 assert(newtype
-> type
);
2789 if(newtype
-> class != OBERON_CLASS_TYPE
)
2791 oberon_error(ctx
, "mult definition");
2794 if(newtype
-> linked
)
2796 oberon_error(ctx
, "mult definition - already linked");
2799 newtype
-> export
= export
;
2800 newtype
-> read_only
= read_only
;
2803 oberon_assert_token(ctx
, EQUAL
);
2805 type
= newtype
-> type
;
2806 oberon_type(ctx
, &type
);
2808 if(type
-> class == OBERON_TYPE_NOTYPE
)
2810 oberon_error(ctx
, "recursive alias declaration");
2813 newtype
-> type
= type
;
2814 newtype
-> linked
= 1;
2817 static void oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2818 static void oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2821 oberon_prevent_recursive_pointer(oberon_context_t
* ctx
, oberon_type_t
* type
)
2823 if(type
-> class != OBERON_TYPE_POINTER
2824 && type
-> class != OBERON_TYPE_ARRAY
)
2829 if(type
-> recursive
)
2831 if(type
-> class == OBERON_TYPE_POINTER
)
2833 oberon_error(ctx
, "recursive pointer declaration");
2837 oberon_error(ctx
, "recursive array declaration (pointer)");
2841 if(type
-> class == OBERON_TYPE_POINTER
2842 && type
-> base
-> class == OBERON_TYPE_POINTER
)
2844 oberon_error(ctx
, "attempt to make pointer to pointer");
2847 type
-> recursive
= 1;
2849 oberon_prevent_recursive_pointer(ctx
, type
-> base
);
2851 type
-> recursive
= 0;
2855 oberon_prevent_recursive_record(oberon_context_t
* ctx
, oberon_type_t
* type
)
2857 if(type
-> class != OBERON_TYPE_RECORD
)
2862 if(type
-> recursive
)
2864 oberon_error(ctx
, "recursive record declaration");
2867 type
-> recursive
= 1;
2871 oberon_prevent_recursive_record(ctx
, type
-> base
);
2874 int num_fields
= type
-> num_decl
;
2875 oberon_object_t
* field
= type
-> decl
;
2876 for(int i
= 0; i
< num_fields
; i
++)
2878 oberon_prevent_recursive_object(ctx
, field
);
2879 field
= field
-> next
;
2882 type
-> recursive
= 0;
2885 oberon_prevent_recursive_procedure(oberon_context_t
* ctx
, oberon_type_t
* type
)
2887 if(type
-> class != OBERON_TYPE_PROCEDURE
)
2892 if(type
-> recursive
)
2894 oberon_error(ctx
, "recursive procedure declaration");
2897 type
-> recursive
= 1;
2899 int num_fields
= type
-> num_decl
;
2900 oberon_object_t
* field
= type
-> decl
;
2901 for(int i
= 0; i
< num_fields
; i
++)
2903 oberon_prevent_recursive_object(ctx
, field
);
2904 field
= field
-> next
;
2907 type
-> recursive
= 0;
2911 oberon_prevent_recursive_array(oberon_context_t
* ctx
, oberon_type_t
* type
)
2913 if(type
-> class != OBERON_TYPE_ARRAY
)
2918 if(type
-> recursive
)
2920 oberon_error(ctx
, "recursive array declaration");
2923 type
-> recursive
= 1;
2925 oberon_prevent_recursive_type(ctx
, type
-> base
);
2927 type
-> recursive
= 0;
2931 oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2933 if(type
-> class == OBERON_TYPE_POINTER
)
2935 oberon_prevent_recursive_pointer(ctx
, type
);
2937 else if(type
-> class == OBERON_TYPE_RECORD
)
2939 oberon_prevent_recursive_record(ctx
, type
);
2941 else if(type
-> class == OBERON_TYPE_ARRAY
)
2943 oberon_prevent_recursive_array(ctx
, type
);
2945 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2947 oberon_prevent_recursive_procedure(ctx
, type
);
2952 oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2956 case OBERON_CLASS_VAR
:
2957 case OBERON_CLASS_TYPE
:
2958 case OBERON_CLASS_PARAM
:
2959 case OBERON_CLASS_VAR_PARAM
:
2960 case OBERON_CLASS_FIELD
:
2961 oberon_prevent_recursive_type(ctx
, x
-> type
);
2963 case OBERON_CLASS_CONST
:
2964 case OBERON_CLASS_PROC
:
2965 case OBERON_CLASS_MODULE
:
2968 oberon_error(ctx
, "oberon_prevent_recursive_object: wat");
2974 oberon_prevent_recursive_decl(oberon_context_t
* ctx
)
2976 oberon_object_t
* x
= ctx
-> decl
-> list
-> next
;
2980 oberon_prevent_recursive_object(ctx
, x
);
2985 static void oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2986 static void oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2989 oberon_initialize_record_fields(oberon_context_t
* ctx
, oberon_type_t
* type
)
2991 assert(type
-> class == OBERON_TYPE_RECORD
);
2993 int num_fields
= type
-> num_decl
;
2994 oberon_object_t
* field
= type
-> decl
;
2995 for(int i
= 0; i
< num_fields
; i
++)
2997 oberon_initialize_object(ctx
, field
);
2998 field
= field
-> next
;
3001 oberon_generator_init_record(ctx
, type
);
3005 oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
3007 if(type
-> class == OBERON_TYPE_NOTYPE
)
3009 oberon_error(ctx
, "undeclarated type");
3012 if(type
-> initialized
)
3017 type
-> initialized
= 1;
3019 if(type
-> class == OBERON_TYPE_POINTER
|| type
-> class == OBERON_TYPE_ARRAY
)
3021 if(type
-> class == OBERON_TYPE_ARRAY
3022 && type
-> size
!= 0
3023 && type
-> base
-> class == OBERON_TYPE_ARRAY
3024 && type
-> base
-> size
== 0)
3026 oberon_error(ctx
, "open array not allowed as array element");
3029 oberon_type_t
* rec
= type
-> base
;
3030 while(rec
-> class == OBERON_TYPE_ARRAY
|| rec
-> class == OBERON_TYPE_POINTER
)
3035 if(rec
-> class == OBERON_TYPE_RECORD
3036 && rec
-> initialized
== 0)
3038 rec
-> initialized
= 1;
3039 oberon_generator_init_type(ctx
, rec
);
3040 oberon_initialize_type(ctx
, type
-> base
);
3041 oberon_generator_init_type(ctx
, type
);
3042 oberon_initialize_record_fields(ctx
, rec
);
3046 oberon_initialize_type(ctx
, type
-> base
);
3047 oberon_generator_init_type(ctx
, type
);
3050 else if(type
-> class == OBERON_TYPE_RECORD
)
3052 printf("Init type: RECORD\n");
3053 oberon_generator_init_type(ctx
, type
);
3054 oberon_initialize_record_fields(ctx
, type
);
3056 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
3058 printf("Init type: PROCEDURE\n");
3059 int num_fields
= type
-> num_decl
;
3060 oberon_object_t
* field
= type
-> decl
;
3061 for(int i
= 0; i
< num_fields
; i
++)
3063 oberon_initialize_type(ctx
, field
-> type
);
3064 field
= field
-> next
;
3067 oberon_generator_init_type(ctx
, type
);
3071 oberon_generator_init_type(ctx
, type
);
3076 oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
3078 if(x
-> initialized
)
3083 x
-> initialized
= 1;
3087 case OBERON_CLASS_TYPE
:
3088 oberon_initialize_type(ctx
, x
-> type
);
3090 case OBERON_CLASS_VAR
:
3091 case OBERON_CLASS_FIELD
:
3092 if(x
-> type
-> class == OBERON_TYPE_ARRAY
)
3094 if(x
-> type
-> size
== 0)
3096 oberon_error(ctx
, "open array not allowed as variable or field");
3099 oberon_initialize_type(ctx
, x
-> type
);
3100 oberon_generator_init_var(ctx
, x
);
3102 case OBERON_CLASS_PARAM
:
3103 case OBERON_CLASS_VAR_PARAM
:
3104 oberon_initialize_type(ctx
, x
-> type
);
3105 oberon_generator_init_var(ctx
, x
);
3107 case OBERON_CLASS_CONST
:
3108 case OBERON_CLASS_PROC
:
3109 case OBERON_CLASS_MODULE
:
3112 oberon_error(ctx
, "oberon_initialize_object: wat");
3118 oberon_initialize_decl(oberon_context_t
* ctx
)
3120 oberon_object_t
* x
= ctx
-> decl
-> list
;
3124 oberon_initialize_object(ctx
, x
-> next
);
3130 oberon_prevent_undeclarated_procedures(oberon_context_t
* ctx
)
3132 oberon_object_t
* x
= ctx
-> decl
-> list
;
3136 if(x
-> next
-> class == OBERON_CLASS_PROC
)
3138 if(x
-> next
-> linked
== 0)
3140 oberon_error(ctx
, "unresolved forward declaration");
3148 oberon_decl_seq(oberon_context_t
* ctx
)
3150 while(ctx
-> token
>= CONST
&& ctx
-> token
<= VAR
)
3152 if(ctx
-> token
== CONST
)
3154 oberon_assert_token(ctx
, CONST
);
3155 while(ctx
-> token
== IDENT
)
3157 oberon_const_decl(ctx
);
3158 oberon_assert_token(ctx
, SEMICOLON
);
3161 else if(ctx
-> token
== TYPE
)
3163 oberon_assert_token(ctx
, TYPE
);
3164 while(ctx
-> token
== IDENT
)
3166 oberon_type_decl(ctx
);
3167 oberon_assert_token(ctx
, SEMICOLON
);
3170 else if(ctx
-> token
== VAR
)
3172 oberon_assert_token(ctx
, VAR
);
3173 while(ctx
-> token
== IDENT
)
3175 oberon_var_decl(ctx
);
3176 oberon_assert_token(ctx
, SEMICOLON
);
3181 oberon_prevent_recursive_decl(ctx
);
3182 oberon_initialize_decl(ctx
);
3184 while(ctx
-> token
== PROCEDURE
)
3186 oberon_proc_decl(ctx
);
3187 oberon_assert_token(ctx
, SEMICOLON
);
3190 oberon_prevent_undeclarated_procedures(ctx
);
3193 static oberon_expr_t
*
3194 oberon_make_temp_var_item(oberon_context_t
* ctx
, oberon_type_t
* type
)
3196 oberon_object_t
* x
;
3197 oberon_expr_t
* expr
;
3199 x
= oberon_create_object(ctx
-> decl
, "TEMP", OBERON_CLASS_VAR
, false, false);
3202 oberon_generator_init_temp_var(ctx
, x
);
3204 expr
= oberon_new_item(MODE_VAR
, type
, false);
3205 expr
-> item
.var
= x
;
3210 oberon_statement_seq(oberon_context_t
* ctx
);
3213 oberon_assign(oberon_context_t
* ctx
, oberon_expr_t
* src
, oberon_expr_t
* dst
)
3215 oberon_check_dst(ctx
, dst
);
3216 oberon_check_assignment_compatible(ctx
, src
, dst
-> result
);
3218 if(oberon_is_array_of_char_type(dst
-> result
)
3219 && oberon_is_string_type(src
-> result
))
3222 oberon_make_copy_call(ctx
, 2, src
);
3226 src
= oberon_cast_expr(ctx
, src
, dst
-> result
);
3227 oberon_generate_assign(ctx
, src
, dst
);
3231 static oberon_expr_t
*
3232 oberon_case_labels(oberon_context_t
* ctx
, oberon_expr_t
* val
)
3236 oberon_expr_t
* cond
;
3237 oberon_expr_t
* cond2
;
3239 e1
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3242 if(ctx
-> token
== DOTDOT
)
3244 oberon_assert_token(ctx
, DOTDOT
);
3245 e2
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3251 cond
= oberon_make_bin_op(ctx
, EQUAL
, val
, e1
);
3255 /* val >= e1 && val <= e2 */
3256 cond
= oberon_make_bin_op(ctx
, GEQ
, val
, e1
);
3257 cond2
= oberon_make_bin_op(ctx
, LEQ
, val
, e2
);
3258 cond
= oberon_make_bin_op(ctx
, AND
, cond
, cond2
);
3265 oberon_case(oberon_context_t
* ctx
, oberon_expr_t
* val
, gen_label_t
* end
)
3267 oberon_expr_t
* cond
;
3268 oberon_expr_t
* cond2
;
3269 gen_label_t
* this_end
;
3271 if(ISEXPR(ctx
-> token
))
3273 this_end
= oberon_generator_reserve_label(ctx
);
3275 cond
= oberon_case_labels(ctx
, val
);
3276 while(ctx
-> token
== COMMA
)
3278 oberon_assert_token(ctx
, COMMA
);
3280 cond2
= oberon_case_labels(ctx
, val
);
3281 cond
= oberon_make_bin_op(ctx
, OR
, cond
, cond2
);
3283 oberon_assert_token(ctx
, COLON
);
3285 oberon_generate_branch(ctx
, cond
, false, this_end
);
3286 oberon_statement_seq(ctx
);
3287 oberon_generate_goto(ctx
, end
);
3289 oberon_generate_label(ctx
, this_end
);
3294 oberon_case_statement(oberon_context_t
* ctx
)
3296 oberon_expr_t
* val
;
3297 oberon_expr_t
* expr
;
3300 end
= oberon_generator_reserve_label(ctx
);
3302 oberon_assert_token(ctx
, CASE
);
3303 expr
= oberon_expr(ctx
);
3304 val
= oberon_make_temp_var_item(ctx
, expr
-> result
);
3305 oberon_assign(ctx
, expr
, val
);
3306 oberon_assert_token(ctx
, OF
);
3307 oberon_case(ctx
, val
, end
);
3308 while(ctx
-> token
== BAR
)
3310 oberon_assert_token(ctx
, BAR
);
3311 oberon_case(ctx
, val
, end
);
3314 if(ctx
-> token
== ELSE
)
3316 oberon_assert_token(ctx
, ELSE
);
3317 oberon_statement_seq(ctx
);
3321 oberon_generate_trap(ctx
, -1);
3324 oberon_generate_label(ctx
, end
);
3325 oberon_assert_token(ctx
, END
);
3329 oberon_with_guard_do(oberon_context_t
* ctx
, gen_label_t
* end
)
3331 oberon_object_t
* var
;
3332 oberon_expr_t
* var_expr
;
3333 oberon_expr_t
* type_expr
;
3334 oberon_expr_t
* cond
;
3335 oberon_type_t
* type
;
3336 oberon_type_t
* old_type
;
3337 gen_label_t
* this_end
;
3339 this_end
= oberon_generator_reserve_label(ctx
);
3341 var_expr
= oberon_qualident_expr(ctx
);
3342 oberon_assert_token(ctx
, COLON
);
3343 type_expr
= oberon_qualident_expr(ctx
);
3344 cond
= oberon_make_bin_op(ctx
, IS
, var_expr
, type_expr
);
3346 var
= var_expr
-> item
.var
;
3347 type
= type_expr
-> result
;
3348 old_type
= var
-> type
;
3350 oberon_assert_token(ctx
, DO
);
3351 oberon_generate_branch(ctx
, cond
, false, this_end
);
3354 oberon_set_typecheck(var
, true);
3356 oberon_statement_seq(ctx
);
3358 var
-> type
= old_type
;
3359 oberon_set_typecheck(var
, false);
3361 oberon_generate_goto(ctx
, end
);
3362 oberon_generate_label(ctx
, this_end
);
3366 oberon_with_statement(oberon_context_t
* ctx
)
3369 end
= oberon_generator_reserve_label(ctx
);
3371 oberon_assert_token(ctx
, WITH
);
3372 oberon_with_guard_do(ctx
, end
);
3373 while(ctx
-> token
== BAR
)
3375 oberon_assert_token(ctx
, BAR
);
3376 oberon_with_guard_do(ctx
, end
);
3379 if(ctx
-> token
== ELSE
)
3381 oberon_assert_token(ctx
, ELSE
);
3382 oberon_statement_seq(ctx
);
3386 oberon_generate_trap(ctx
, -2);
3389 oberon_generate_label(ctx
, end
);
3390 oberon_assert_token(ctx
, END
);
3394 oberon_statement(oberon_context_t
* ctx
)
3396 oberon_expr_t
* item1
;
3397 oberon_expr_t
* item2
;
3399 if(ctx
-> token
== IDENT
)
3401 item1
= oberon_designator(ctx
);
3402 if(ctx
-> token
== ASSIGN
)
3404 oberon_assert_token(ctx
, ASSIGN
);
3405 item2
= oberon_expr(ctx
);
3406 oberon_assign(ctx
, item2
, item1
);
3410 oberon_opt_proc_parens(ctx
, item1
);
3413 else if(ctx
-> token
== IF
)
3417 oberon_expr_t
* cond
;
3419 els
= oberon_generator_reserve_label(ctx
);
3420 end
= oberon_generator_reserve_label(ctx
);
3422 oberon_assert_token(ctx
, IF
);
3423 cond
= oberon_expr(ctx
);
3424 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3426 oberon_error(ctx
, "condition must be boolean");
3428 oberon_assert_token(ctx
, THEN
);
3429 oberon_generate_branch(ctx
, cond
, false, els
);
3430 oberon_statement_seq(ctx
);
3431 oberon_generate_goto(ctx
, end
);
3432 oberon_generate_label(ctx
, els
);
3434 while(ctx
-> token
== ELSIF
)
3436 els
= oberon_generator_reserve_label(ctx
);
3438 oberon_assert_token(ctx
, ELSIF
);
3439 cond
= oberon_expr(ctx
);
3440 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3442 oberon_error(ctx
, "condition must be boolean");
3444 oberon_assert_token(ctx
, THEN
);
3445 oberon_generate_branch(ctx
, cond
, false, els
);
3446 oberon_statement_seq(ctx
);
3447 oberon_generate_goto(ctx
, end
);
3448 oberon_generate_label(ctx
, els
);
3451 if(ctx
-> token
== ELSE
)
3453 oberon_assert_token(ctx
, ELSE
);
3454 oberon_statement_seq(ctx
);
3457 oberon_generate_label(ctx
, end
);
3458 oberon_assert_token(ctx
, END
);
3460 else if(ctx
-> token
== WHILE
)
3462 gen_label_t
* begin
;
3464 oberon_expr_t
* cond
;
3466 begin
= oberon_generator_reserve_label(ctx
);
3467 end
= oberon_generator_reserve_label(ctx
);
3469 oberon_assert_token(ctx
, WHILE
);
3470 oberon_generate_label(ctx
, begin
);
3471 cond
= oberon_expr(ctx
);
3472 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3474 oberon_error(ctx
, "condition must be boolean");
3476 oberon_generate_branch(ctx
, cond
, false, end
);
3478 oberon_assert_token(ctx
, DO
);
3479 oberon_statement_seq(ctx
);
3480 oberon_generate_goto(ctx
, begin
);
3482 oberon_assert_token(ctx
, END
);
3483 oberon_generate_label(ctx
, end
);
3485 else if(ctx
-> token
== REPEAT
)
3487 gen_label_t
* begin
;
3488 oberon_expr_t
* cond
;
3490 begin
= oberon_generator_reserve_label(ctx
);
3491 oberon_generate_label(ctx
, begin
);
3492 oberon_assert_token(ctx
, REPEAT
);
3494 oberon_statement_seq(ctx
);
3496 oberon_assert_token(ctx
, UNTIL
);
3498 cond
= oberon_expr(ctx
);
3499 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3501 oberon_error(ctx
, "condition must be boolean");
3504 oberon_generate_branch(ctx
, cond
, false, begin
);
3506 else if(ctx
-> token
== FOR
)
3508 oberon_expr_t
* from
;
3509 oberon_expr_t
* index
;
3511 oberon_expr_t
* bound
;
3513 oberon_expr_t
* cond
;
3514 oberon_expr_t
* count
;
3515 gen_label_t
* begin
;
3520 begin
= oberon_generator_reserve_label(ctx
);
3521 end
= oberon_generator_reserve_label(ctx
);
3523 oberon_assert_token(ctx
, FOR
);
3524 iname
= oberon_assert_ident(ctx
);
3525 index
= oberon_ident_item(ctx
, iname
);
3526 oberon_assert_token(ctx
, ASSIGN
);
3527 from
= oberon_expr(ctx
);
3528 oberon_assert_token(ctx
, TO
);
3529 bound
= oberon_make_temp_var_item(ctx
, index
-> result
);
3530 to
= oberon_expr(ctx
);
3531 oberon_assign(ctx
, to
, bound
); // сначала temp
3532 oberon_assign(ctx
, from
, index
); // потом i
3533 if(ctx
-> token
== BY
)
3535 oberon_assert_token(ctx
, BY
);
3536 by
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3540 by
= oberon_make_integer(ctx
, 1);
3543 if(by
-> result
-> class != OBERON_TYPE_INTEGER
)
3545 oberon_error(ctx
, "must be integer");
3548 if(by
-> item
.integer
> 0)
3552 else if(by
-> item
.integer
< 0)
3558 oberon_error(ctx
, "zero step not allowed");
3561 oberon_assert_token(ctx
, DO
);
3562 oberon_generate_label(ctx
, begin
);
3563 cond
= oberon_make_bin_op(ctx
, op
, index
, bound
);
3564 oberon_generate_branch(ctx
, cond
, false, end
);
3565 oberon_statement_seq(ctx
);
3566 count
= oberon_make_bin_op(ctx
, PLUS
, index
, by
);
3567 oberon_assign(ctx
, count
, index
);
3568 oberon_generate_goto(ctx
, begin
);
3569 oberon_generate_label(ctx
, end
);
3570 oberon_assert_token(ctx
, END
);
3572 else if(ctx
-> token
== LOOP
)
3574 gen_label_t
* begin
;
3577 begin
= oberon_generator_reserve_label(ctx
);
3578 end
= oberon_generator_reserve_label(ctx
);
3580 oberon_open_scope(ctx
);
3581 oberon_assert_token(ctx
, LOOP
);
3582 oberon_generate_label(ctx
, begin
);
3583 ctx
-> decl
-> exit_label
= end
;
3584 oberon_statement_seq(ctx
);
3585 oberon_generate_goto(ctx
, begin
);
3586 oberon_generate_label(ctx
, end
);
3587 oberon_assert_token(ctx
, END
);
3588 oberon_close_scope(ctx
-> decl
);
3590 else if(ctx
-> token
== EXIT
)
3592 oberon_assert_token(ctx
, EXIT
);
3593 if(ctx
-> decl
-> exit_label
== NULL
)
3595 oberon_error(ctx
, "not in LOOP-END");
3597 oberon_generate_goto(ctx
, ctx
-> decl
-> exit_label
);
3599 else if(ctx
-> token
== CASE
)
3601 oberon_case_statement(ctx
);
3603 else if(ctx
-> token
== WITH
)
3605 oberon_with_statement(ctx
);
3607 else if(ctx
-> token
== RETURN
)
3609 oberon_assert_token(ctx
, RETURN
);
3610 if(ISEXPR(ctx
-> token
))
3612 oberon_expr_t
* expr
;
3613 expr
= oberon_expr(ctx
);
3614 oberon_make_return(ctx
, expr
);
3618 oberon_make_return(ctx
, NULL
);
3624 oberon_statement_seq(oberon_context_t
* ctx
)
3626 oberon_statement(ctx
);
3627 while(ctx
-> token
== SEMICOLON
)
3629 oberon_assert_token(ctx
, SEMICOLON
);
3630 oberon_statement(ctx
);
3635 oberon_import_module(oberon_context_t
* ctx
, char * alias
, char * name
)
3637 oberon_module_t
* m
= ctx
-> module_list
;
3638 while(m
&& strcmp(m
-> name
, name
) != 0)
3645 oberon_scanner_t
* s
;
3646 s
= ctx
-> import_module(name
);
3649 oberon_error(ctx
, "no such module %s", name
);
3652 m
= oberon_compile_module(ctx
, s
);
3658 oberon_error(ctx
, "cyclic module import");
3661 oberon_object_t
* ident
;
3662 ident
= oberon_define_object(ctx
-> decl
, alias
, OBERON_CLASS_MODULE
, false, false, false);
3663 ident
-> module
= m
;
3667 oberon_import_decl(oberon_context_t
* ctx
)
3672 alias
= name
= oberon_assert_ident(ctx
);
3673 if(ctx
-> token
== ASSIGN
)
3675 oberon_assert_token(ctx
, ASSIGN
);
3676 name
= oberon_assert_ident(ctx
);
3679 oberon_import_module(ctx
, alias
, name
);
3683 oberon_import_list(oberon_context_t
* ctx
)
3685 oberon_assert_token(ctx
, IMPORT
);
3687 oberon_import_decl(ctx
);
3688 while(ctx
-> token
== COMMA
)
3690 oberon_assert_token(ctx
, COMMA
);
3691 oberon_import_decl(ctx
);
3694 oberon_assert_token(ctx
, SEMICOLON
);
3698 oberon_parse_module(oberon_context_t
* ctx
)
3702 oberon_read_token(ctx
);
3704 oberon_assert_token(ctx
, MODULE
);
3705 name1
= oberon_assert_ident(ctx
);
3706 oberon_assert_token(ctx
, SEMICOLON
);
3707 ctx
-> mod
-> name
= name1
;
3709 oberon_generator_init_module(ctx
, ctx
-> mod
);
3711 if(ctx
-> token
== IMPORT
)
3713 oberon_import_list(ctx
);
3716 oberon_decl_seq(ctx
);
3718 oberon_generate_begin_module(ctx
);
3719 if(ctx
-> token
== BEGIN
)
3721 oberon_assert_token(ctx
, BEGIN
);
3722 oberon_statement_seq(ctx
);
3724 oberon_generate_end_module(ctx
);
3726 oberon_assert_token(ctx
, END
);
3727 name2
= oberon_assert_ident(ctx
);
3728 oberon_expect_token(ctx
, DOT
);
3730 if(strcmp(name1
, name2
) != 0)
3732 oberon_error(ctx
, "module name not matched");
3735 oberon_generator_fini_module(ctx
-> mod
);
3738 // =======================================================================
3740 // =======================================================================
3742 static oberon_expr_t
*
3743 oberon_make_min_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3747 oberon_error(ctx
, "too few arguments");
3752 oberon_error(ctx
, "too mach arguments");
3755 oberon_expr_t
* arg
;
3758 if(!oberon_is_type_expr(arg
))
3760 oberon_error(ctx
, "MIN accept only type");
3763 oberon_expr_t
* expr
;
3764 int bits
= arg
-> result
-> size
* 8;
3765 switch(arg
-> result
-> class)
3767 case OBERON_TYPE_INTEGER
:
3768 expr
= oberon_make_integer(ctx
, -powl(2, bits
- 1));
3770 case OBERON_TYPE_BOOLEAN
:
3771 expr
= oberon_make_boolean(ctx
, false);
3773 case OBERON_TYPE_CHAR
:
3774 expr
= oberon_make_char(ctx
, 0);
3776 case OBERON_TYPE_REAL
:
3777 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (-FLT_MAX
) : (-DBL_MAX
), arg
-> result
);
3779 case OBERON_TYPE_SET
:
3780 expr
= oberon_make_integer(ctx
, 0);
3783 oberon_error(ctx
, "allowed only basic types");
3790 static oberon_expr_t
*
3791 oberon_make_max_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3795 oberon_error(ctx
, "too few arguments");
3800 oberon_error(ctx
, "too mach arguments");
3803 oberon_expr_t
* arg
;
3806 if(!oberon_is_type_expr(arg
))
3808 oberon_error(ctx
, "MAX accept only type");
3811 oberon_expr_t
* expr
;
3812 int bits
= arg
-> result
-> size
* 8;
3813 switch(arg
-> result
-> class)
3815 case OBERON_TYPE_INTEGER
:
3816 expr
= oberon_make_integer(ctx
, powl(2, bits
- 1) - 1);
3818 case OBERON_TYPE_BOOLEAN
:
3819 expr
= oberon_make_boolean(ctx
, true);
3821 case OBERON_TYPE_CHAR
:
3822 expr
= oberon_make_char(ctx
, powl(2, bits
) - 1);
3824 case OBERON_TYPE_REAL
:
3825 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (FLT_MAX
) : (DBL_MAX
), arg
-> result
);
3827 case OBERON_TYPE_SET
:
3828 expr
= oberon_make_integer(ctx
, bits
);
3831 oberon_error(ctx
, "allowed only basic types");
3838 static oberon_expr_t
*
3839 oberon_make_size_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3843 oberon_error(ctx
, "too few arguments");
3848 oberon_error(ctx
, "too mach arguments");
3851 oberon_expr_t
* arg
;
3853 if(!oberon_is_type_expr(arg
))
3855 oberon_error(ctx
, "SIZE accept only type");
3859 oberon_expr_t
* expr
;
3860 oberon_type_t
* type
= arg
-> result
;
3861 switch(type
-> class)
3863 case OBERON_TYPE_INTEGER
:
3864 case OBERON_TYPE_BOOLEAN
:
3865 case OBERON_TYPE_REAL
:
3866 case OBERON_TYPE_CHAR
:
3867 case OBERON_TYPE_SET
:
3868 size
= type
-> size
;
3871 oberon_error(ctx
, "TODO SIZE");
3875 expr
= oberon_make_integer(ctx
, size
);
3879 static oberon_expr_t
*
3880 oberon_make_abs_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3884 oberon_error(ctx
, "too few arguments");
3889 oberon_error(ctx
, "too mach arguments");
3892 oberon_expr_t
* arg
;
3894 oberon_check_src(ctx
, arg
);
3896 if(!oberon_is_number_type(arg
-> result
))
3898 oberon_error(ctx
, "ABS accepts only numbers");
3901 oberon_expr_t
* expr
;
3902 if(oberon_is_const(arg
))
3904 if(oberon_is_real_type(arg
-> result
))
3906 double x
= arg
-> item
.real
;
3907 expr
= oberon_make_real(ctx
, fabsl(x
), arg
-> result
);
3911 int64_t x
= arg
-> item
.integer
;
3912 expr
= oberon_make_integer(ctx
, llabs(x
));
3917 expr
= oberon_new_operator(OP_ABS
, arg
-> result
, arg
, NULL
);
3923 oberon_make_inc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3927 oberon_error(ctx
, "too few arguments");
3932 oberon_error(ctx
, "too mach arguments");
3935 oberon_expr_t
* dst
;
3937 oberon_check_dst(ctx
, dst
);
3939 if(!oberon_is_integer_type(dst
-> result
))
3941 oberon_error(ctx
, "expect integer");
3944 oberon_expr_t
* step
;
3947 step
= list_args
-> next
;
3948 oberon_check_src(ctx
, step
);
3949 if(!oberon_is_integer_type(step
-> result
))
3951 oberon_error(ctx
, "expect integer");
3956 step
= oberon_make_integer(ctx
, 1);
3959 oberon_expr_t
* expr
;
3960 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, step
);
3961 oberon_assign(ctx
, expr
, dst
);
3965 oberon_make_incl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3969 oberon_error(ctx
, "too few arguments");
3974 oberon_error(ctx
, "too mach arguments");
3977 oberon_expr_t
* dst
;
3979 oberon_check_dst(ctx
, dst
);
3981 if(!oberon_is_set_type(dst
-> result
))
3983 oberon_error(ctx
, "expect integer");
3987 x
= list_args
-> next
;
3988 oberon_check_src(ctx
, x
);
3990 if(!oberon_is_integer_type(x
-> result
))
3992 oberon_error(ctx
, "expect integer");
3995 oberon_expr_t
* expr
;
3996 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
3997 oberon_assign(ctx
, expr
, dst
);
4001 oberon_make_excl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4005 oberon_error(ctx
, "too few arguments");
4010 oberon_error(ctx
, "too mach arguments");
4013 oberon_expr_t
* dst
;
4015 oberon_check_dst(ctx
, dst
);
4017 if(!oberon_is_set_type(dst
-> result
))
4019 oberon_error(ctx
, "expect integer");
4023 x
= list_args
-> next
;
4024 oberon_check_src(ctx
, x
);
4026 if(!oberon_is_integer_type(x
-> result
))
4028 oberon_error(ctx
, "expect integer");
4031 oberon_expr_t
* expr
;
4032 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
4033 oberon_assign(ctx
, expr
, dst
);
4037 oberon_make_dec_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4041 oberon_error(ctx
, "too few arguments");
4046 oberon_error(ctx
, "too mach arguments");
4049 oberon_expr_t
* dst
;
4051 oberon_check_dst(ctx
, dst
);
4053 if(!oberon_is_integer_type(dst
-> result
))
4055 oberon_error(ctx
, "expect integer");
4058 oberon_expr_t
* step
;
4061 step
= list_args
-> next
;
4062 oberon_check_src(ctx
, step
);
4063 if(!oberon_is_integer_type(step
-> result
))
4065 oberon_error(ctx
, "expect integer");
4070 step
= oberon_make_integer(ctx
, 1);
4073 oberon_expr_t
* expr
;
4074 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, step
);
4075 oberon_assign(ctx
, expr
, dst
);
4079 oberon_make_new_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4083 oberon_error(ctx
, "too few arguments");
4086 oberon_expr_t
* dst
;
4088 oberon_check_dst(ctx
, dst
);
4090 oberon_type_t
* type
;
4091 type
= dst
-> result
;
4093 if(type
-> class != OBERON_TYPE_POINTER
)
4095 oberon_error(ctx
, "not a pointer");
4098 type
= type
-> base
;
4100 oberon_expr_t
* src
;
4101 src
= oberon_new_item(MODE_NEW
, dst
-> result
, 0);
4102 src
-> item
.num_args
= 0;
4103 src
-> item
.args
= NULL
;
4106 if(type
-> class == OBERON_TYPE_ARRAY
)
4108 if(type
-> size
== 0)
4110 oberon_type_t
* x
= type
;
4111 while(x
-> class == OBERON_TYPE_ARRAY
)
4121 if(num_args
< max_args
)
4123 oberon_error(ctx
, "too few arguments");
4126 if(num_args
> max_args
)
4128 oberon_error(ctx
, "too mach arguments");
4131 int num_sizes
= max_args
- 1;
4132 oberon_expr_t
* size_list
= list_args
-> next
;
4134 oberon_expr_t
* arg
= size_list
;
4135 for(int i
= 0; i
< max_args
- 1; i
++)
4137 oberon_check_src(ctx
, arg
);
4138 if(arg
-> result
-> class != OBERON_TYPE_INTEGER
)
4140 oberon_error(ctx
, "size must be integer");
4145 src
-> item
.num_args
= num_sizes
;
4146 src
-> item
.args
= size_list
;
4148 else if(type
-> class != OBERON_TYPE_RECORD
)
4150 oberon_error(ctx
, "oberon_make_new_call: wat");
4153 if(num_args
> max_args
)
4155 oberon_error(ctx
, "too mach arguments");
4158 oberon_assign(ctx
, src
, dst
);
4162 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4166 oberon_error(ctx
, "too few arguments");
4171 oberon_error(ctx
, "too mach arguments");
4174 oberon_expr_t
* src
;
4176 oberon_check_src(ctx
, src
);
4178 oberon_expr_t
* dst
;
4179 dst
= list_args
-> next
;
4180 oberon_check_dst(ctx
, dst
);
4182 if(!oberon_is_string_type(src
-> result
) && !oberon_is_array_of_char_type(src
-> result
))
4184 oberon_error(ctx
, "source must be string or array of char");
4187 if(!oberon_is_array_of_char_type(dst
-> result
))
4189 oberon_error(ctx
, "dst must be array of char");
4192 oberon_generate_copy(ctx
, src
, dst
);
4196 oberon_make_assert_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4200 oberon_error(ctx
, "too few arguments");
4205 oberon_error(ctx
, "too mach arguments");
4208 oberon_expr_t
* cond
;
4210 oberon_check_src(ctx
, cond
);
4212 if(!oberon_is_boolean_type(cond
-> result
))
4214 oberon_error(ctx
, "expected boolean");
4219 oberon_generate_assert(ctx
, cond
);
4223 oberon_expr_t
* num
;
4224 num
= list_args
-> next
;
4225 oberon_check_src(ctx
, num
);
4227 if(!oberon_is_integer_type(num
-> result
))
4229 oberon_error(ctx
, "expected integer");
4232 oberon_check_const(ctx
, num
);
4234 oberon_generate_assert_n(ctx
, cond
, num
-> item
.integer
);
4239 oberon_make_halt_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4243 oberon_error(ctx
, "too few arguments");
4248 oberon_error(ctx
, "too mach arguments");
4251 oberon_expr_t
* num
;
4253 oberon_check_src(ctx
, num
);
4255 if(num
-> result
-> class != OBERON_TYPE_INTEGER
)
4257 oberon_error(ctx
, "expected integer");
4260 oberon_check_const(ctx
, num
);
4262 oberon_generate_halt(ctx
, num
-> item
.integer
);
4265 static oberon_expr_t
*
4266 oberon_make_ash_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4270 oberon_error(ctx
, "too few arguments");
4275 oberon_error(ctx
, "too mach arguments");
4278 oberon_expr_t
* arg1
;
4280 oberon_check_src(ctx
, arg1
);
4281 if(arg1
-> result
-> class != OBERON_TYPE_INTEGER
)
4283 oberon_error(ctx
, "expected integer");
4286 oberon_expr_t
* arg2
;
4287 arg2
= list_args
-> next
;
4288 oberon_check_src(ctx
, arg2
);
4289 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4291 oberon_error(ctx
, "expected integer");
4294 oberon_expr_t
* expr
;
4295 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4297 int64_t x
= arg1
-> item
.integer
;
4298 int64_t y
= arg2
-> item
.integer
;
4299 int64_t v
= (y
> 0) ? (x
<< y
) : (x
>> labs(y
));
4300 expr
= oberon_make_integer(ctx
, v
);
4304 expr
= oberon_new_operator(OP_ASH
, arg1
-> result
, arg1
, arg2
);
4310 static oberon_expr_t
*
4311 oberon_make_lsh_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4315 oberon_error(ctx
, "too few arguments");
4320 oberon_error(ctx
, "too mach arguments");
4323 oberon_expr_t
* arg1
;
4325 oberon_check_src(ctx
, arg1
);
4327 oberon_type_t
* t
= arg1
-> result
;
4328 if(!oberon_is_integer_type(t
)
4329 && !oberon_is_char_type(t
)
4330 && !oberon_is_system_byte_type(t
))
4332 oberon_error(ctx
, "expected integer, char, or SYSTEM.BYTE");
4335 oberon_expr_t
* arg2
;
4336 arg2
= list_args
-> next
;
4337 oberon_check_src(ctx
, arg2
);
4338 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4340 oberon_error(ctx
, "expected integer");
4343 oberon_expr_t
* expr
;
4344 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4346 uint64_t x
= arg1
-> item
.integer
;
4347 int64_t y
= arg2
-> item
.integer
;
4348 uint64_t v
= (y
> 0) ? (x
<< y
) : (x
>> labs(y
));
4350 if(oberon_is_integer_type(t
))
4352 expr
= oberon_make_integer(ctx
, v
);
4354 else if(oberon_is_char_type(t
))
4356 expr
= oberon_make_char(ctx
, v
);
4360 expr
= oberon_make_system_byte(ctx
, v
);
4365 expr
= oberon_new_operator(OP_LSH
, arg1
-> result
, arg1
, arg2
);
4366 expr
= oberon_cast_expr(ctx
, expr
, t
);
4372 static oberon_expr_t
*
4373 oberon_make_rot_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4377 oberon_error(ctx
, "too few arguments");
4382 oberon_error(ctx
, "too mach arguments");
4385 oberon_expr_t
* arg1
;
4387 oberon_check_src(ctx
, arg1
);
4389 oberon_type_t
* t
= arg1
-> result
;
4390 if(!oberon_is_integer_type(t
)
4391 && !oberon_is_char_type(t
)
4392 && !oberon_is_system_byte_type(t
))
4394 oberon_error(ctx
, "expected integer, char, or SYSTEM.BYTE");
4397 oberon_expr_t
* arg2
;
4398 arg2
= list_args
-> next
;
4399 oberon_check_src(ctx
, arg2
);
4400 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4402 oberon_error(ctx
, "expected integer");
4405 oberon_expr_t
* expr
;
4406 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4408 uint64_t x
= arg1
-> item
.integer
;
4409 int64_t y
= arg2
-> item
.integer
;
4414 v
= (x
<< y
) | (x
>> (64 - y
));
4419 v
= (x
>> y
) | (x
<< (64 - y
));
4422 if(oberon_is_integer_type(t
))
4424 expr
= oberon_make_integer(ctx
, v
);
4426 else if(oberon_is_char_type(t
))
4428 expr
= oberon_make_char(ctx
, v
);
4432 expr
= oberon_make_system_byte(ctx
, v
);
4437 expr
= oberon_new_operator(OP_ROT
, arg1
-> result
, arg1
, arg2
);
4438 expr
= oberon_cast_expr(ctx
, expr
, t
);
4444 static oberon_expr_t
*
4445 oberon_make_cap_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4449 oberon_error(ctx
, "too few arguments");
4454 oberon_error(ctx
, "too mach arguments");
4457 oberon_expr_t
* arg
;
4459 oberon_check_src(ctx
, arg
);
4461 if(!oberon_is_char_type(arg
-> result
))
4463 oberon_error(ctx
, "expected char");
4466 oberon_expr_t
* expr
;
4467 if(oberon_is_const(arg
))
4469 expr
= oberon_make_char(ctx
, toupper(arg
-> item
.integer
));
4473 expr
= oberon_new_operator(OP_CAP
, arg
-> result
, arg
, NULL
);
4479 static oberon_expr_t
*
4480 oberon_make_chr_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4484 oberon_error(ctx
, "too few arguments");
4489 oberon_error(ctx
, "too mach arguments");
4492 oberon_expr_t
* arg
;
4494 oberon_check_src(ctx
, arg
);
4496 if(!oberon_is_integer_type(arg
-> result
))
4498 oberon_error(ctx
, "expected integer");
4501 oberon_expr_t
* expr
;
4502 if(oberon_is_const(arg
))
4504 expr
= oberon_make_char(ctx
, arg
-> item
.integer
);
4508 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> char_type
);
4513 static oberon_expr_t
*
4514 oberon_make_ord_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4518 oberon_error(ctx
, "too few arguments");
4523 oberon_error(ctx
, "too mach arguments");
4526 oberon_expr_t
* arg
;
4528 oberon_check_src(ctx
, arg
);
4530 if(!oberon_is_char_type(arg
-> result
) && !oberon_is_string_of_one(arg
))
4532 oberon_error(ctx
, "expected char");
4535 oberon_expr_t
* expr
;
4536 if(oberon_is_const(arg
))
4538 expr
= oberon_make_integer(ctx
, arg
-> item
.integer
);
4542 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> shortint_type
);
4547 static oberon_expr_t
*
4548 oberon_make_entier_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4552 oberon_error(ctx
, "too few arguments");
4557 oberon_error(ctx
, "too mach arguments");
4560 oberon_expr_t
* arg
;
4562 oberon_check_src(ctx
, arg
);
4564 if(!oberon_is_real_type(arg
-> result
))
4566 oberon_error(ctx
, "expected real");
4569 oberon_expr_t
* expr
;
4570 if(oberon_is_const(arg
))
4572 expr
= oberon_make_integer(ctx
, floor(arg
-> item
.real
));
4576 expr
= oberon_new_operator(OP_ENTIER
, ctx
-> int_type
, arg
, NULL
);
4581 static oberon_expr_t
*
4582 oberon_make_odd_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4586 oberon_error(ctx
, "too few arguments");
4591 oberon_error(ctx
, "too mach arguments");
4594 oberon_expr_t
* arg
;
4596 oberon_check_src(ctx
, arg
);
4598 if(!oberon_is_integer_type(arg
-> result
))
4600 oberon_error(ctx
, "expected integer");
4603 oberon_expr_t
* expr
;
4604 expr
= oberon_make_bin_op(ctx
, MOD
, arg
, oberon_make_integer(ctx
, 2));
4605 expr
= oberon_make_bin_op(ctx
, EQUAL
, expr
, oberon_make_integer(ctx
, 1));
4609 static oberon_expr_t
*
4610 oberon_make_cc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4614 oberon_error(ctx
, "too few arguments");
4619 oberon_error(ctx
, "too mach arguments");
4622 oberon_expr_t
* arg
;
4624 oberon_check_src(ctx
, arg
);
4625 oberon_check_const(ctx
, arg
);
4627 if(!oberon_is_integer_type(arg
-> result
))
4629 oberon_error(ctx
, "expected integer");
4632 /* n >= 0 && n <= 15 */
4634 oberon_expr_t
* cond1
;
4635 oberon_expr_t
* cond2
;
4636 cond1
= oberon_make_bin_op(ctx
, GEQ
, arg
, oberon_make_integer(ctx
, 0));
4637 cond2
= oberon_make_bin_op(ctx
, LEQ
, arg
, oberon_make_integer(ctx
, 15));
4638 return oberon_make_bin_op(ctx
, AND
, cond1
, cond2
);
4641 static oberon_expr_t
*
4642 oberon_make_short_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4646 oberon_error(ctx
, "too few arguments");
4651 oberon_error(ctx
, "too mach arguments");
4654 oberon_expr_t
* arg
;
4656 oberon_check_src(ctx
, arg
);
4658 if(arg
-> result
-> shorter
== NULL
)
4660 oberon_error(ctx
, "already shorter");
4663 oberon_expr_t
* expr
;
4664 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> shorter
);
4668 static oberon_expr_t
*
4669 oberon_make_long_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4673 oberon_error(ctx
, "too few arguments");
4678 oberon_error(ctx
, "too mach arguments");
4681 oberon_expr_t
* arg
;
4683 oberon_check_src(ctx
, arg
);
4685 if(arg
-> result
-> longer
== NULL
)
4687 oberon_error(ctx
, "already longer");
4690 oberon_expr_t
* expr
;
4691 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> longer
);
4695 static oberon_expr_t
*
4696 oberon_make_val_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4700 oberon_error(ctx
, "too few arguments");
4705 oberon_error(ctx
, "too mach arguments");
4708 oberon_expr_t
* typ
;
4710 if(!oberon_is_type_expr(typ
))
4712 oberon_error(ctx
, "requires type");
4715 oberon_expr_t
* arg
;
4716 arg
= list_args
-> next
;
4717 oberon_check_src(ctx
, arg
);
4719 oberon_expr_t
* expr
;
4720 expr
= oberon_hard_cast_expr(ctx
, arg
, typ
-> result
);
4724 static oberon_expr_t
*
4725 oberon_make_len_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4729 oberon_error(ctx
, "too few arguments");
4734 oberon_error(ctx
, "too mach arguments");
4739 oberon_check_src(ctx
, v
);
4741 if(!oberon_is_array_type(v
-> result
))
4743 oberon_error(ctx
, "expected array");
4749 oberon_expr_t
* num
;
4750 num
= list_args
-> next
;
4751 oberon_check_src(ctx
, num
);
4753 if(!oberon_is_integer_type(num
-> result
))
4755 oberon_error(ctx
, "expected integer");
4757 oberon_check_const(ctx
, num
);
4759 n
= num
-> item
.integer
;
4763 oberon_type_t
* arr
= v
-> result
;
4764 while(arr
-> class == OBERON_TYPE_ARRAY
)
4770 if(n
< 0 || n
> dim
)
4772 oberon_error(ctx
, "not in range 0..%i", dim
- 1);
4775 assert(v
-> is_item
);
4777 oberon_expr_t
* expr
;
4778 expr
= oberon_new_item(MODE_LEN
, ctx
-> int_type
, true);
4779 expr
-> item
.parent
= (oberon_item_t
*) v
;
4780 expr
-> item
.integer
= n
;
4785 oberon_new_const(oberon_context_t
* ctx
, char * name
, oberon_expr_t
* expr
)
4787 oberon_object_t
* constant
;
4788 constant
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_CONST
, true, false, false);
4789 oberon_check_const(ctx
, expr
);
4790 constant
-> value
= (oberon_item_t
*) expr
;
4794 register_default_types(oberon_context_t
* ctx
)
4796 ctx
-> notype_type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
4797 oberon_generator_init_type(ctx
, ctx
-> notype_type
);
4799 ctx
-> nil_type
= oberon_new_type_ptr(OBERON_TYPE_NIL
);
4800 oberon_generator_init_type(ctx
, ctx
-> nil_type
);
4802 ctx
-> string_type
= oberon_new_type_string(1);
4803 oberon_generator_init_type(ctx
, ctx
-> string_type
);
4805 ctx
-> bool_type
= oberon_new_type_boolean();
4806 oberon_generator_init_type(ctx
, ctx
-> bool_type
);
4808 ctx
-> char_type
= oberon_new_type_char(1);
4809 oberon_generator_init_type(ctx
, ctx
-> char_type
);
4811 ctx
-> byte_type
= oberon_new_type_integer(1);
4812 oberon_generator_init_type(ctx
, ctx
-> byte_type
);
4814 ctx
-> shortint_type
= oberon_new_type_integer(2);
4815 oberon_generator_init_type(ctx
, ctx
-> shortint_type
);
4817 ctx
-> int_type
= oberon_new_type_integer(4);
4818 oberon_generator_init_type(ctx
, ctx
-> int_type
);
4820 ctx
-> longint_type
= oberon_new_type_integer(8);
4821 oberon_generator_init_type(ctx
, ctx
-> longint_type
);
4823 ctx
-> real_type
= oberon_new_type_real(4);
4824 oberon_generator_init_type(ctx
, ctx
-> real_type
);
4826 ctx
-> longreal_type
= oberon_new_type_real(8);
4827 oberon_generator_init_type(ctx
, ctx
-> longreal_type
);
4829 ctx
-> set_type
= oberon_new_type_set(4);
4830 oberon_generator_init_type(ctx
, ctx
-> set_type
);
4832 ctx
-> system_byte_type
= oberon_new_type_ptr(OBERON_TYPE_SYSTEM_BYTE
);
4833 oberon_generator_init_type(ctx
, ctx
-> system_byte_type
);
4835 ctx
-> system_ptr_type
= oberon_new_type_ptr(OBERON_TYPE_SYSTEM_PTR
);
4836 oberon_generator_init_type(ctx
, ctx
-> system_ptr_type
);
4838 /* LONG / SHORT support */
4839 ctx
-> byte_type
-> shorter
= NULL
;
4840 ctx
-> byte_type
-> longer
= ctx
-> shortint_type
;
4842 ctx
-> shortint_type
-> shorter
= ctx
-> byte_type
;
4843 ctx
-> shortint_type
-> longer
= ctx
-> int_type
;
4845 ctx
-> int_type
-> shorter
= ctx
-> shortint_type
;
4846 ctx
-> int_type
-> longer
= ctx
-> longint_type
;
4848 ctx
-> longint_type
-> shorter
= ctx
-> int_type
;
4849 ctx
-> longint_type
-> longer
= NULL
;
4851 ctx
-> real_type
-> shorter
= NULL
;
4852 ctx
-> real_type
-> longer
= ctx
-> longreal_type
;
4854 ctx
-> longreal_type
-> shorter
= ctx
-> real_type
;
4855 ctx
-> longreal_type
-> longer
= NULL
;
4859 oberon_new_intrinsic(oberon_context_t
* ctx
, char * name
, GenerateFuncCallback f
, GenerateProcCallback p
)
4861 oberon_object_t
* proc
;
4862 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, true, false, false);
4863 proc
-> type
= oberon_new_type_ptr(OBERON_TYPE_PROCEDURE
);
4864 proc
-> type
-> sysproc
= true;
4865 proc
-> type
-> genfunc
= f
;
4866 proc
-> type
-> genproc
= p
;
4869 static void oberon_new_intrinsic_type(oberon_context_t
* ctx
, char * name
, oberon_type_t
* type
)
4871 oberon_object_t
* id
;
4872 id
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, true, false, false);
4877 oberon_begin_intrinsic_module(oberon_context_t
* ctx
, char * name
, oberon_module_t
** m
)
4879 oberon_scope_t
* module_scope
;
4880 module_scope
= oberon_open_scope(ctx
);
4882 oberon_module_t
* module
;
4883 module
= GC_MALLOC(sizeof *module
);
4884 memset(module
, 0, sizeof *module
);
4885 module
-> name
= name
;
4886 module
-> intrinsic
= true;
4887 module
-> decl
= module_scope
;
4888 module
-> next
= ctx
-> module_list
;
4890 ctx
-> mod
= module
;
4891 ctx
-> module_list
= module
;
4897 oberon_end_intrinsic_module(oberon_context_t
* ctx
, oberon_module_t
* m
)
4899 oberon_close_scope(m
-> decl
);
4905 oberon_create_context(ModuleImportCallback import_module
)
4907 oberon_context_t
* ctx
= GC_MALLOC(sizeof *ctx
);
4908 memset(ctx
, 0, sizeof *ctx
);
4910 oberon_scope_t
* world_scope
;
4911 world_scope
= oberon_open_scope(ctx
);
4912 ctx
-> world_scope
= world_scope
;
4914 ctx
-> import_module
= import_module
;
4916 oberon_generator_init_context(ctx
);
4919 register_default_types(ctx
);
4922 oberon_new_const(ctx
, "TRUE", oberon_make_boolean(ctx
, true));
4923 oberon_new_const(ctx
, "FALSE", oberon_make_boolean(ctx
, false));
4926 oberon_new_intrinsic_type(ctx
, "BOOLEAN", ctx
-> bool_type
);
4927 oberon_new_intrinsic_type(ctx
, "CHAR", ctx
-> char_type
);
4928 oberon_new_intrinsic_type(ctx
, "SHORTINT", ctx
-> byte_type
);
4929 oberon_new_intrinsic_type(ctx
, "INTEGER", ctx
-> shortint_type
);
4930 oberon_new_intrinsic_type(ctx
, "LONGINT", ctx
-> int_type
);
4931 oberon_new_intrinsic_type(ctx
, "HUGEINT", ctx
-> longint_type
);
4932 oberon_new_intrinsic_type(ctx
, "REAL", ctx
-> real_type
);
4933 oberon_new_intrinsic_type(ctx
, "LONGREAL", ctx
-> longreal_type
);
4934 oberon_new_intrinsic_type(ctx
, "SET", ctx
-> set_type
);
4937 oberon_new_intrinsic(ctx
, "ABS", oberon_make_abs_call
, NULL
);
4938 oberon_new_intrinsic(ctx
, "ASH", oberon_make_ash_call
, NULL
);
4939 oberon_new_intrinsic(ctx
, "CAP", oberon_make_cap_call
, NULL
);
4940 oberon_new_intrinsic(ctx
, "CHR", oberon_make_chr_call
, NULL
);
4941 oberon_new_intrinsic(ctx
, "ENTIER", oberon_make_entier_call
, NULL
);
4942 oberon_new_intrinsic(ctx
, "LEN", oberon_make_len_call
, NULL
);
4943 oberon_new_intrinsic(ctx
, "LONG", oberon_make_long_call
, NULL
);
4944 oberon_new_intrinsic(ctx
, "MAX", oberon_make_max_call
, NULL
);
4945 oberon_new_intrinsic(ctx
, "MIN", oberon_make_min_call
, NULL
);
4946 oberon_new_intrinsic(ctx
, "ODD", oberon_make_odd_call
, NULL
);
4947 oberon_new_intrinsic(ctx
, "ORD", oberon_make_ord_call
, NULL
);
4948 oberon_new_intrinsic(ctx
, "SHORT", oberon_make_short_call
, NULL
);
4949 oberon_new_intrinsic(ctx
, "SIZE", oberon_make_size_call
, NULL
);
4952 oberon_new_intrinsic(ctx
, "ASSERT", NULL
, oberon_make_assert_call
);
4953 oberon_new_intrinsic(ctx
, "COPY", NULL
, oberon_make_copy_call
);
4954 oberon_new_intrinsic(ctx
, "DEC", NULL
, oberon_make_dec_call
);
4955 oberon_new_intrinsic(ctx
, "EXCL", NULL
, oberon_make_excl_call
);
4956 oberon_new_intrinsic(ctx
, "HALT", NULL
, oberon_make_halt_call
);
4957 oberon_new_intrinsic(ctx
, "INC", NULL
, oberon_make_inc_call
);
4958 oberon_new_intrinsic(ctx
, "INCL", NULL
, oberon_make_incl_call
);
4959 oberon_new_intrinsic(ctx
, "NEW", NULL
, oberon_make_new_call
);
4962 oberon_begin_intrinsic_module(ctx
, "SYSTEM", &ctx
-> system_module
);
4965 oberon_new_intrinsic_type(ctx
, "BYTE", ctx
-> system_byte_type
);
4966 oberon_new_intrinsic_type(ctx
, "PTR", ctx
-> system_ptr_type
);
4967 oberon_new_intrinsic_type(ctx
, "INT8", ctx
-> byte_type
);
4968 oberon_new_intrinsic_type(ctx
, "INT16", ctx
-> shortint_type
);
4969 oberon_new_intrinsic_type(ctx
, "INT32", ctx
-> int_type
);
4970 oberon_new_intrinsic_type(ctx
, "INT64", ctx
-> longint_type
);
4971 oberon_new_intrinsic_type(ctx
, "SET32", ctx
-> set_type
);
4974 oberon_new_intrinsic(ctx
, "CC", oberon_make_cc_call
, NULL
);
4975 oberon_new_intrinsic(ctx
, "LSH", oberon_make_lsh_call
, NULL
);
4976 oberon_new_intrinsic(ctx
, "ROT", oberon_make_rot_call
, NULL
);
4977 oberon_new_intrinsic(ctx
, "VAL", oberon_make_val_call
, NULL
);
4979 oberon_end_intrinsic_module(ctx
, ctx
-> system_module
);
4985 oberon_destroy_context(oberon_context_t
* ctx
)
4987 oberon_generator_destroy_context(ctx
);
4991 oberon_compile_module(oberon_context_t
* ctx
, oberon_scanner_t
* s
)
4993 const char * code
= ctx
-> code
;
4994 int code_index
= ctx
-> code_index
;
4995 oberon_location_t loc
= ctx
-> loc
;
4996 oberon_location_t xloc
= ctx
-> xloc
;
4998 int token
= ctx
-> token
;
4999 char * string
= ctx
-> string
;
5000 int integer
= ctx
-> integer
;
5001 int real
= ctx
-> real
;
5002 bool longmode
= ctx
-> longmode
;
5003 oberon_scope_t
* decl
= ctx
-> decl
;
5004 oberon_module_t
* mod
= ctx
-> mod
;
5006 oberon_scope_t
* module_scope
;
5007 module_scope
= oberon_open_scope(ctx
);
5009 oberon_module_t
* module
;
5010 module
= GC_MALLOC(sizeof *module
);
5011 memset(module
, 0, sizeof *module
);
5012 module
-> decl
= module_scope
;
5013 module
-> next
= ctx
-> module_list
;
5015 ctx
-> mod
= module
;
5016 ctx
-> module_list
= module
;
5018 oberon_init_scaner(ctx
, s
);
5019 oberon_parse_module(ctx
);
5021 module
-> ready
= 1;
5024 ctx
-> code_index
= code_index
;
5028 ctx
-> token
= token
;
5029 ctx
-> string
= string
;
5030 ctx
-> integer
= integer
;
5032 ctx
-> longmode
= longmode
;