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_skip_space(oberon_context_t
* ctx
)
698 while(isspace(ctx
-> c
))
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
);
724 oberon_read_comment(oberon_context_t
* ctx
)
731 oberon_get_char(ctx
);
734 oberon_get_char(ctx
);
738 else if(ctx
-> c
== '*')
740 oberon_get_char(ctx
);
743 oberon_get_char(ctx
);
747 else if(ctx
-> c
== 0)
749 oberon_error(ctx
, "unterminated comment");
753 oberon_get_char(ctx
);
758 static void oberon_read_string(oberon_context_t
* ctx
)
761 oberon_get_char(ctx
);
763 int start
= ctx
-> code_index
;
765 while(ctx
-> c
!= 0 && ctx
-> c
!= c
)
767 oberon_get_char(ctx
);
772 oberon_error(ctx
, "unterminated string");
775 int end
= ctx
-> code_index
;
777 oberon_get_char(ctx
);
779 char * string
= GC_MALLOC(end
- start
+ 1);
780 strncpy(string
, &ctx
-> code
[start
], end
- start
);
781 string
[end
- start
] = 0;
783 ctx
-> token
= STRING
;
784 ctx
-> string
= string
;
785 ctx
-> integer
= string
[0];
788 static void oberon_read_token(oberon_context_t
* ctx
);
791 oberon_read_symbol(oberon_context_t
* ctx
)
800 ctx
-> token
= SEMICOLON
;
801 oberon_get_char(ctx
);
804 ctx
-> token
= COLON
;
805 oberon_get_char(ctx
);
808 ctx
-> token
= ASSIGN
;
809 oberon_get_char(ctx
);
814 oberon_get_char(ctx
);
817 ctx
-> token
= DOTDOT
;
818 oberon_get_char(ctx
);
822 ctx
-> token
= LPAREN
;
823 oberon_get_char(ctx
);
826 oberon_get_char(ctx
);
827 oberon_read_comment(ctx
);
828 oberon_read_token(ctx
);
832 ctx
-> token
= RPAREN
;
833 oberon_get_char(ctx
);
836 ctx
-> token
= EQUAL
;
837 oberon_get_char(ctx
);
841 oberon_get_char(ctx
);
845 oberon_get_char(ctx
);
849 oberon_get_char(ctx
);
853 ctx
-> token
= GREAT
;
854 oberon_get_char(ctx
);
858 oberon_get_char(ctx
);
863 oberon_get_char(ctx
);
866 ctx
-> token
= MINUS
;
867 oberon_get_char(ctx
);
871 oberon_get_char(ctx
);
874 oberon_get_char(ctx
);
875 oberon_error(ctx
, "unstarted comment");
879 ctx
-> token
= SLASH
;
880 oberon_get_char(ctx
);
884 oberon_get_char(ctx
);
888 oberon_get_char(ctx
);
891 ctx
-> token
= COMMA
;
892 oberon_get_char(ctx
);
895 ctx
-> token
= LBRACK
;
896 oberon_get_char(ctx
);
899 ctx
-> token
= RBRACK
;
900 oberon_get_char(ctx
);
903 ctx
-> token
= UPARROW
;
904 oberon_get_char(ctx
);
907 oberon_read_string(ctx
);
910 oberon_read_string(ctx
);
913 ctx
-> token
= LBRACE
;
914 oberon_get_char(ctx
);
917 ctx
-> token
= RBRACE
;
918 oberon_get_char(ctx
);
922 oberon_get_char(ctx
);
925 oberon_error(ctx
, "invalid char %c", ctx
-> c
);
931 oberon_read_token(oberon_context_t
* ctx
)
933 oberon_skip_space(ctx
);
935 ctx
-> loc
= ctx
-> xloc
;
938 if(isalpha(c
) || c
== '_')
940 oberon_read_ident(ctx
);
944 oberon_read_number(ctx
);
948 oberon_read_symbol(ctx
);
952 // =======================================================================
954 // =======================================================================
956 static void oberon_expect_token(oberon_context_t
* ctx
, int token
);
957 static oberon_expr_t
* oberon_expr(oberon_context_t
* ctx
);
958 static void oberon_assert_token(oberon_context_t
* ctx
, int token
);
959 static char * oberon_assert_ident(oberon_context_t
* ctx
);
960 static void oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
);
961 static oberon_item_t
* oberon_const_expr(oberon_context_t
* ctx
);
962 static oberon_expr_t
* oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
);
963 static bool oberon_is_const(oberon_expr_t
* expr
);
965 static oberon_expr_t
*
966 oberon_make_unary_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
)
968 oberon_expr_t
* expr
;
969 oberon_type_t
* result
;
971 result
= a
-> result
;
975 if(result
-> class == OBERON_TYPE_SET
)
977 if(oberon_is_const(a
))
979 expr
= oberon_make_set(ctx
, ~(a
-> item
.integer
));
983 expr
= oberon_new_operator(OP_COMPLEMENTATION
, result
, a
, NULL
);
986 else if(result
-> class == OBERON_TYPE_INTEGER
)
988 if(oberon_is_const(a
))
990 expr
= oberon_make_integer(ctx
, -(a
-> item
.integer
));
994 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
997 else if(result
-> class == OBERON_TYPE_REAL
)
999 if(oberon_is_const(a
))
1001 expr
= oberon_make_real_typed(ctx
, -(a
-> item
.real
), result
);
1005 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
1010 oberon_error(ctx
, "incompatible operator type");
1013 else if(token
== NOT
)
1015 if(result
-> class != OBERON_TYPE_BOOLEAN
)
1017 oberon_error(ctx
, "incompatible operator type");
1020 if(oberon_is_const(a
))
1022 expr
= oberon_make_boolean(ctx
, !(a
-> item
.integer
));
1026 expr
= oberon_new_operator(OP_LOGIC_NOT
, result
, a
, NULL
);
1031 oberon_error(ctx
, "oberon_make_unary_op: wat");
1038 oberon_expr_list(oberon_context_t
* ctx
, int * num_expr
, oberon_expr_t
** first
, int const_expr
)
1040 oberon_expr_t
* last
;
1045 *first
= last
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1049 *first
= last
= oberon_expr(ctx
);
1051 while(ctx
-> token
== COMMA
)
1053 oberon_assert_token(ctx
, COMMA
);
1054 oberon_expr_t
* current
;
1058 current
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1062 current
= oberon_expr(ctx
);
1065 last
-> next
= current
;
1071 static oberon_expr_t
*
1072 oberon_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1074 oberon_expr_t
* cast
;
1076 if((oberon_is_char_type(pref
) && oberon_is_const_string(expr
) && strlen(expr
-> item
.string
) == 1))
1078 /* Автоматически преобразуем строку единичного размера в символ */
1079 cast
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
1080 cast
-> item
.integer
= expr
-> item
.string
[0];
1082 else if(!oberon_is_some_types(expr
-> result
, pref
))
1084 cast
= oberon_new_operator(OP_CAST
, pref
, expr
, NULL
);
1094 static oberon_expr_t
*
1095 oberon_hard_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1097 return oberon_new_operator(OP_HARDCAST
, pref
, expr
, NULL
);
1101 oberon_check_dst(oberon_context_t
* ctx
, oberon_expr_t
* dst
)
1103 if(dst
-> read_only
)
1105 oberon_error(ctx
, "read-only destination");
1108 if(dst
-> is_item
== false)
1110 oberon_error(ctx
, "not variable");
1113 switch(dst
-> item
.mode
)
1124 oberon_error(ctx
, "not variable");
1130 oberon_check_src(oberon_context_t
* ctx
, oberon_expr_t
* src
)
1134 if(src
-> item
.mode
== MODE_TYPE
)
1136 oberon_error(ctx
, "not variable");
1142 oberon_autocast_call(oberon_context_t
* ctx
, oberon_item_t
* desig
)
1144 if(desig
-> mode
!= MODE_CALL
)
1146 oberon_error(ctx
, "expected mode CALL");
1149 oberon_type_t
* fn
= desig
-> parent
-> result
;
1150 int num_args
= desig
-> num_args
;
1151 int num_decl
= fn
-> num_decl
;
1153 if(num_args
< num_decl
)
1155 oberon_error(ctx
, "too few arguments");
1157 else if(num_args
> num_decl
)
1159 oberon_error(ctx
, "too many arguments");
1162 /* Делаем проверку на запись и делаем автокаст */
1163 oberon_expr_t
* casted
[num_args
];
1164 oberon_expr_t
* arg
= desig
-> args
;
1165 oberon_object_t
* param
= fn
-> decl
;
1166 for(int i
= 0; i
< num_args
; i
++)
1168 if(param
-> class == OBERON_CLASS_VAR_PARAM
)
1170 oberon_check_dst(ctx
, arg
);
1171 if(!oberon_is_compatible_arrays(param
, arg
))
1173 oberon_check_compatible_var_param(ctx
, param
-> type
, arg
-> result
);
1176 //casted[i] = oberon_cast_expr(ctx, arg, param -> type);
1180 oberon_check_src(ctx
, arg
);
1181 if(!oberon_is_compatible_arrays(param
, arg
))
1183 oberon_check_assignment_compatible(ctx
, arg
, param
-> type
);
1185 casted
[i
] = oberon_cast_expr(ctx
, arg
, param
-> type
);
1189 param
= param
-> next
;
1192 /* Создаём новый список выражений */
1196 for(int i
= 0; i
< num_args
- 1; i
++)
1198 casted
[i
] -> next
= casted
[i
+ 1];
1200 desig
-> args
= arg
;
1204 static oberon_expr_t
*
1205 oberon_make_call_func(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1207 oberon_type_t
* signature
= item
-> result
;
1208 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1210 oberon_error(ctx
, "not a procedure");
1213 oberon_expr_t
* call
;
1215 if(signature
-> sysproc
)
1217 if(signature
-> genfunc
== NULL
)
1219 oberon_error(ctx
, "not a function-procedure");
1222 call
= signature
-> genfunc(ctx
, num_args
, list_args
);
1226 if(signature
-> base
-> class == OBERON_TYPE_NOTYPE
)
1228 oberon_error(ctx
, "attempt to call procedure in expression");
1231 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1232 call
-> item
.parent
= item
;
1233 call
-> item
.num_args
= num_args
;
1234 call
-> item
.args
= list_args
;
1235 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1242 oberon_make_call_proc(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1244 oberon_type_t
* signature
= item
-> result
;
1245 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1247 oberon_error(ctx
, "not a procedure");
1250 oberon_expr_t
* call
;
1252 if(signature
-> sysproc
)
1254 if(signature
-> genproc
== NULL
)
1256 oberon_error(ctx
, "not a procedure");
1259 signature
-> genproc(ctx
, num_args
, list_args
);
1263 if(signature
-> base
-> class != OBERON_TYPE_NOTYPE
)
1265 oberon_error(ctx
, "attempt to call function as non-typed procedure");
1268 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1269 call
-> item
.parent
= item
;
1270 call
-> item
.num_args
= num_args
;
1271 call
-> item
.args
= list_args
;
1272 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1273 oberon_generate_call_proc(ctx
, call
);
1281 || ((x) == INTEGER) \
1284 || ((x) == STRING) \
1286 || ((x) == LPAREN) \
1289 static oberon_expr_t
*
1290 oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1292 if(expr
-> result
-> class != OBERON_TYPE_POINTER
)
1294 oberon_error(ctx
, "not a pointer");
1297 assert(expr
-> is_item
);
1299 oberon_expr_t
* selector
;
1300 selector
= oberon_new_item(MODE_DEREF
, expr
-> result
-> base
, false);
1301 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1306 static oberon_expr_t
*
1307 oberon_make_array_selector(oberon_context_t
* ctx
, oberon_expr_t
* desig
, oberon_expr_t
* index
)
1309 if(desig
-> result
-> class == OBERON_TYPE_POINTER
)
1311 desig
= oberno_make_dereferencing(ctx
, desig
);
1314 assert(desig
-> is_item
);
1316 if(desig
-> result
-> class != OBERON_TYPE_ARRAY
)
1318 oberon_error(ctx
, "not array");
1321 oberon_type_t
* base
;
1322 base
= desig
-> result
-> base
;
1324 if(index
-> result
-> class != OBERON_TYPE_INTEGER
)
1326 oberon_error(ctx
, "index must be integer");
1329 // Статическая проверка границ массива
1330 if(desig
-> result
-> size
!= 0)
1332 if(index
-> is_item
)
1334 if(index
-> item
.mode
== MODE_INTEGER
)
1336 int arr_size
= desig
-> result
-> size
;
1337 int index_int
= index
-> item
.integer
;
1338 if(index_int
< 0 || index_int
> arr_size
- 1)
1340 oberon_error(ctx
, "not in range (dimension size 0..%i)", arr_size
- 1);
1346 oberon_expr_t
* selector
;
1347 selector
= oberon_new_item(MODE_INDEX
, base
, desig
-> read_only
);
1348 selector
-> item
.parent
= (oberon_item_t
*) desig
;
1349 selector
-> item
.num_args
= 1;
1350 selector
-> item
.args
= index
;
1355 static oberon_expr_t
*
1356 oberon_make_record_selector(oberon_context_t
* ctx
, oberon_expr_t
* expr
, char * name
)
1358 if(expr
-> result
-> class == OBERON_TYPE_POINTER
)
1360 expr
= oberno_make_dereferencing(ctx
, expr
);
1363 assert(expr
-> is_item
);
1365 if(expr
-> result
-> class != OBERON_TYPE_RECORD
)
1367 oberon_error(ctx
, "not record");
1370 oberon_type_t
* rec
= expr
-> result
;
1372 oberon_object_t
* field
;
1373 field
= oberon_find_object(rec
-> scope
, name
, true);
1375 if(field
-> export
== 0)
1377 if(field
-> module
!= ctx
-> mod
)
1379 oberon_error(ctx
, "field not exported");
1383 int read_only
= expr
-> read_only
;
1384 if(field
-> read_only
)
1386 if(field
-> module
!= ctx
-> mod
)
1392 oberon_expr_t
* selector
;
1393 selector
= oberon_new_item(MODE_FIELD
, field
-> type
, read_only
);
1394 selector
-> item
.var
= field
;
1395 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1400 #define ISSELECTOR(x) \
1403 || ((x) == UPARROW) \
1406 static oberon_object_t
*
1407 oberon_qualident(oberon_context_t
* ctx
, char ** xname
, int check
)
1410 oberon_object_t
* x
;
1412 name
= oberon_assert_ident(ctx
);
1413 x
= oberon_find_object(ctx
-> decl
, name
, check
);
1417 if(x
-> class == OBERON_CLASS_MODULE
)
1419 oberon_assert_token(ctx
, DOT
);
1420 name
= oberon_assert_ident(ctx
);
1421 /* Наличие объектов в левых модулях всегда проверяется */
1422 x
= oberon_find_object(x
-> module
-> decl
, name
, 1);
1424 if(x
-> export
== 0)
1426 oberon_error(ctx
, "not exported");
1439 static oberon_expr_t
*
1440 oberon_ident_item(oberon_context_t
* ctx
, char * name
)
1443 oberon_object_t
* x
;
1444 oberon_expr_t
* expr
;
1446 x
= oberon_find_object(ctx
-> decl
, name
, true);
1449 if(x
-> class == OBERON_CLASS_CONST
|| x
-> class == OBERON_CLASS_PROC
)
1454 expr
= oberon_new_item(MODE_VAR
, x
-> type
, read_only
);
1455 expr
-> item
.var
= x
;
1459 static oberon_expr_t
*
1460 oberon_qualident_expr(oberon_context_t
* ctx
)
1462 oberon_object_t
* var
;
1463 oberon_expr_t
* expr
;
1465 var
= oberon_qualident(ctx
, NULL
, 1);
1468 if(var
-> read_only
)
1470 if(var
-> module
!= ctx
-> mod
)
1476 switch(var
-> class)
1478 case OBERON_CLASS_CONST
:
1480 expr
= (oberon_expr_t
*) var
-> value
;
1482 case OBERON_CLASS_TYPE
:
1483 expr
= oberon_new_item(MODE_TYPE
, var
-> type
, read_only
);
1485 case OBERON_CLASS_VAR
:
1486 case OBERON_CLASS_VAR_PARAM
:
1487 case OBERON_CLASS_PARAM
:
1488 expr
= oberon_new_item(MODE_VAR
, var
-> type
, read_only
);
1490 case OBERON_CLASS_PROC
:
1491 expr
= oberon_new_item(MODE_VAR
, var
-> type
, true);
1494 oberon_error(ctx
, "invalid designator");
1498 expr
-> item
.var
= var
;
1503 static oberon_expr_t
*
1504 oberon_designator(oberon_context_t
* ctx
)
1507 oberon_expr_t
* expr
;
1508 oberon_object_t
* objtype
;
1510 expr
= oberon_qualident_expr(ctx
);
1512 while(expr
-> result
-> class != OBERON_TYPE_PROCEDURE
&& ISSELECTOR(ctx
-> token
))
1514 switch(ctx
-> token
)
1517 oberon_assert_token(ctx
, DOT
);
1518 name
= oberon_assert_ident(ctx
);
1519 expr
= oberon_make_record_selector(ctx
, expr
, name
);
1522 oberon_assert_token(ctx
, LBRACK
);
1523 int num_indexes
= 0;
1524 oberon_expr_t
* indexes
= NULL
;
1525 oberon_expr_list(ctx
, &num_indexes
, &indexes
, 0);
1526 oberon_assert_token(ctx
, RBRACK
);
1528 for(int i
= 0; i
< num_indexes
; i
++)
1530 expr
= oberon_make_array_selector(ctx
, expr
, indexes
);
1531 indexes
= indexes
-> next
;
1535 oberon_assert_token(ctx
, UPARROW
);
1536 expr
= oberno_make_dereferencing(ctx
, expr
);
1539 oberon_assert_token(ctx
, LPAREN
);
1540 objtype
= oberon_qualident(ctx
, NULL
, true);
1541 oberon_assert_token(ctx
, RPAREN
);
1542 oberon_check_extension_of(ctx
, expr
-> result
, objtype
-> type
);
1543 expr
= oberon_cast_expr(ctx
, expr
, objtype
-> type
);
1546 oberon_error(ctx
, "oberon_designator: wat");
1554 static oberon_expr_t
*
1555 oberon_opt_func_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1557 /* Если есть скобки - значит вызов. Если нет, то передаём указатель. */
1558 if(ctx
-> token
== LPAREN
)
1560 oberon_assert_token(ctx
, LPAREN
);
1563 oberon_expr_t
* arguments
= NULL
;
1565 if(ISEXPR(ctx
-> token
))
1567 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1570 assert(expr
-> is_item
== 1);
1571 expr
= oberon_make_call_func(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1573 oberon_assert_token(ctx
, RPAREN
);
1580 oberon_opt_proc_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1582 assert(expr
-> is_item
);
1585 oberon_expr_t
* arguments
= NULL
;
1587 if(ctx
-> token
== LPAREN
)
1589 oberon_assert_token(ctx
, LPAREN
);
1591 if(ISEXPR(ctx
-> token
))
1593 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1596 oberon_assert_token(ctx
, RPAREN
);
1599 /* Вызов происходит даже без скобок */
1600 oberon_make_call_proc(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1603 static oberon_expr_t
*
1604 oberon_element(oberon_context_t
* ctx
)
1609 e1
= oberon_expr(ctx
);
1610 oberon_check_src(ctx
, e1
);
1611 if(e1
-> result
-> class != OBERON_TYPE_INTEGER
)
1613 oberon_error(ctx
, "expected integer");
1617 if(ctx
-> token
== DOTDOT
)
1619 oberon_assert_token(ctx
, DOTDOT
);
1620 e2
= oberon_expr(ctx
);
1621 oberon_check_src(ctx
, e2
);
1622 if(e2
-> result
-> class != OBERON_TYPE_INTEGER
)
1624 oberon_error(ctx
, "expected integer");
1628 oberon_expr_t
* set
;
1629 if(e2
== NULL
&& oberon_is_const(e1
))
1631 set
= oberon_make_set_index(ctx
, e1
-> item
.integer
);
1633 else if(e2
!= NULL
&& oberon_is_const(e1
) && oberon_is_const(e2
))
1635 set
= oberon_make_set_range(ctx
, e1
-> item
.integer
, e2
-> item
.integer
);
1639 set
= oberon_new_operator(OP_RANGE
, ctx
-> set_type
, e1
, e2
);
1644 static oberon_expr_t
*
1645 oberon_make_set_union(oberon_context_t
* ctx
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1647 if(oberon_is_const(a
) && oberon_is_const(b
))
1649 return oberon_make_set(ctx
, (a
-> item
.integer
| b
-> item
.integer
));
1653 return oberon_new_operator(OP_UNION
, ctx
-> set_type
, a
, b
);
1657 static oberon_expr_t
*
1658 oberon_set(oberon_context_t
* ctx
)
1660 oberon_expr_t
* set
;
1661 oberon_expr_t
* elements
;
1662 set
= oberon_make_set(ctx
, 0);
1664 oberon_assert_token(ctx
, LBRACE
);
1665 if(ISEXPR(ctx
-> token
))
1667 elements
= oberon_element(ctx
);
1668 set
= oberon_make_set_union(ctx
, set
, elements
);
1669 while(ctx
-> token
== COMMA
)
1671 oberon_assert_token(ctx
, COMMA
);
1672 elements
= oberon_element(ctx
);
1673 set
= oberon_make_set_union(ctx
, set
, elements
);
1676 oberon_assert_token(ctx
, RBRACE
);
1681 static oberon_expr_t
*
1682 oberon_factor(oberon_context_t
* ctx
)
1684 oberon_expr_t
* expr
;
1685 oberon_type_t
* result
;
1687 switch(ctx
-> token
)
1690 expr
= oberon_designator(ctx
);
1691 expr
= oberon_opt_func_parens(ctx
, expr
);
1694 expr
= oberon_make_integer(ctx
, ctx
-> integer
);
1695 oberon_assert_token(ctx
, INTEGER
);
1698 result
= ctx
-> char_type
;
1699 expr
= oberon_new_item(MODE_CHAR
, result
, true);
1700 expr
-> item
.integer
= ctx
-> integer
;
1701 oberon_assert_token(ctx
, CHAR
);
1704 expr
= oberon_make_string(ctx
, ctx
-> string
);
1705 oberon_assert_token(ctx
, STRING
);
1708 expr
= oberon_make_real(ctx
, ctx
-> real
, ctx
-> longmode
);
1709 oberon_assert_token(ctx
, REAL
);
1712 expr
= oberon_set(ctx
);
1715 oberon_assert_token(ctx
, LPAREN
);
1716 expr
= oberon_expr(ctx
);
1717 oberon_assert_token(ctx
, RPAREN
);
1720 oberon_assert_token(ctx
, NOT
);
1721 expr
= oberon_factor(ctx
);
1722 expr
= oberon_make_unary_op(ctx
, NOT
, expr
);
1725 oberon_assert_token(ctx
, NIL
);
1726 expr
= oberon_new_item(MODE_NIL
, ctx
-> nil_type
, true);
1729 oberon_error(ctx
, "invalid expression");
1735 static oberon_expr_t
*
1736 oberon_make_bin_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1738 oberon_expr_t
* expr
;
1739 oberon_type_t
* result
;
1741 oberon_check_compatible_bin_expr(ctx
, token
, a
, b
);
1742 oberon_check_src(ctx
, a
);
1745 oberon_check_src(ctx
, b
);
1750 if(oberon_is_const(a
) && oberon_is_const(b
))
1752 expr
= oberon_make_boolean(ctx
, (1 << a
-> item
.integer
) & b
-> item
.integer
);
1756 expr
= oberon_new_operator(OP_IN
, ctx
-> bool_type
, a
, b
);
1759 else if(token
== IS
)
1761 oberon_check_type_expr(ctx
, b
);
1762 expr
= oberon_new_operator(OP_IS
, ctx
-> bool_type
, a
, b
);
1764 else if((token
>= EQUAL
&& token
<= GEQ
) || token
== OR
|| token
== AND
)
1766 if(oberon_is_string_of_one(a
) && oberon_is_char_type(b
-> result
))
1768 result
= b
-> result
;
1770 else if(oberon_is_string_of_one(b
) && oberon_is_char_type(a
-> result
))
1772 result
= a
-> result
;
1774 else if(oberon_is_string_of_one(a
) && oberon_is_string_of_one(b
))
1776 result
= ctx
-> char_type
;
1780 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1783 if(oberon_is_const(a
) && oberon_is_const(b
)
1784 && (oberon_is_real_type(result
) || oberon_is_integer_type(result
)))
1786 if(oberon_is_real_type(result
))
1788 double x
= a
-> item
.real
;
1789 double y
= b
-> item
.real
;
1792 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1793 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1794 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1795 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1796 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1797 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1798 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1799 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1800 default: assert(0); break;
1803 else if(oberon_is_integer_type(result
))
1805 int64_t x
= a
-> item
.integer
;
1806 int64_t y
= b
-> item
.integer
;
1809 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1810 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1811 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1812 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1813 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1814 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1815 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1816 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1817 default: assert(0); break;
1827 a
= oberon_cast_expr(ctx
, a
, result
);
1828 b
= oberon_cast_expr(ctx
, b
, result
);
1829 result
= ctx
-> bool_type
;
1832 case EQUAL
: expr
= oberon_new_operator(OP_EQ
, result
, a
, b
); break;
1833 case NEQ
: expr
= oberon_new_operator(OP_NEQ
, result
, a
, b
); break;
1834 case LESS
: expr
= oberon_new_operator(OP_LSS
, result
, a
, b
); break;
1835 case LEQ
: expr
= oberon_new_operator(OP_LEQ
, result
, a
, b
); break;
1836 case GREAT
: expr
= oberon_new_operator(OP_GRT
, result
, a
, b
); break;
1837 case GEQ
: expr
= oberon_new_operator(OP_GEQ
, result
, a
, b
); break;
1838 case OR
: expr
= oberon_new_operator(OP_LOGIC_OR
, result
, a
, b
); break;
1839 case AND
: expr
= oberon_new_operator(OP_LOGIC_AND
, result
, a
, b
); break;
1840 default: assert(0); break;
1844 else if(token
== SLASH
)
1846 if(oberon_is_set_type(a
-> result
) && oberon_is_set_type(b
-> result
))
1848 if(oberon_is_const(a
) && oberon_is_const(b
))
1850 int64_t x
= a
-> item
.integer
;
1851 int64_t y
= b
-> item
.integer
;
1852 expr
= oberon_make_set(ctx
, x
^ y
);
1856 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1857 a
= oberon_cast_expr(ctx
, a
, result
);
1858 b
= oberon_cast_expr(ctx
, b
, result
);
1859 expr
= oberon_new_operator(OP_SYM_DIFFERENCE
, result
, a
, b
);
1864 result
= oberon_get_longer_real_type(ctx
, a
-> result
, b
-> result
);
1865 if(oberon_is_const(a
) && oberon_is_const(b
))
1867 double x
= a
-> item
.real
;
1868 double y
= b
-> item
.real
;
1869 expr
= oberon_make_real_typed(ctx
, x
/ y
, result
);
1873 a
= oberon_cast_expr(ctx
, a
, result
);
1874 b
= oberon_cast_expr(ctx
, b
, result
);
1875 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
1881 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1883 if(oberon_is_const(a
) && oberon_is_const(b
))
1885 if(oberon_is_set_type(result
))
1887 int64_t x
= a
-> item
.integer
;
1888 int64_t y
= b
-> item
.integer
;
1891 case PLUS
: expr
= oberon_make_set(ctx
, x
| y
); break;
1892 case MINUS
: expr
= oberon_make_set(ctx
, x
& ~y
); break;
1893 case STAR
: expr
= oberon_make_set(ctx
, x
& y
); break;
1894 default: assert(0); break;
1897 if(oberon_is_real_type(result
))
1899 double x
= a
-> item
.real
;
1900 double y
= b
-> item
.real
;
1903 case PLUS
: expr
= oberon_make_real_typed(ctx
, x
+ y
, result
); break;
1904 case MINUS
: expr
= oberon_make_real_typed(ctx
, x
- y
, result
); break;
1905 case STAR
: expr
= oberon_make_real_typed(ctx
, x
* y
, result
); break;
1906 default: assert(0); break;
1909 else if(oberon_is_integer_type(result
))
1911 int64_t x
= a
-> item
.integer
;
1912 int64_t y
= b
-> item
.integer
;
1915 case PLUS
: expr
= oberon_make_integer(ctx
, x
+ y
); break;
1916 case MINUS
: expr
= oberon_make_integer(ctx
, x
- y
); break;
1917 case STAR
: expr
= oberon_make_integer(ctx
, x
* y
); break;
1918 case DIV
: expr
= oberon_make_integer(ctx
, x
/ y
); break;
1919 case MOD
: expr
= oberon_make_integer(ctx
, x
% y
); break;
1920 default: assert(0); break;
1930 a
= oberon_cast_expr(ctx
, a
, result
);
1931 b
= oberon_cast_expr(ctx
, b
, result
);
1934 if(oberon_is_set_type(result
))
1939 expr
= oberon_new_operator(OP_UNION
, result
, a
, b
);
1942 expr
= oberon_new_operator(OP_DIFFERENCE
, result
, a
, b
);
1945 expr
= oberon_new_operator(OP_INTERSECTION
, result
, a
, b
);
1952 else if(oberon_is_number_type(result
))
1957 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
1960 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
1963 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
1980 #define ISMULOP(x) \
1981 ((x) >= STAR && (x) <= AND)
1983 static oberon_expr_t
*
1984 oberon_term_expr(oberon_context_t
* ctx
)
1986 oberon_expr_t
* expr
;
1988 expr
= oberon_factor(ctx
);
1989 while(ISMULOP(ctx
-> token
))
1991 int token
= ctx
-> token
;
1992 oberon_read_token(ctx
);
1994 oberon_expr_t
* inter
= oberon_factor(ctx
);
1995 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2001 #define ISADDOP(x) \
2002 ((x) >= PLUS && (x) <= OR)
2004 static oberon_expr_t
*
2005 oberon_simple_expr(oberon_context_t
* ctx
)
2007 oberon_expr_t
* expr
;
2010 if(ctx
-> token
== PLUS
)
2013 oberon_assert_token(ctx
, PLUS
);
2015 else if(ctx
-> token
== MINUS
)
2018 oberon_assert_token(ctx
, MINUS
);
2021 expr
= oberon_term_expr(ctx
);
2023 while(ISADDOP(ctx
-> token
))
2025 int token
= ctx
-> token
;
2026 oberon_read_token(ctx
);
2028 oberon_expr_t
* inter
= oberon_term_expr(ctx
);
2029 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2034 expr
= oberon_make_unary_op(ctx
, MINUS
, expr
);
2040 #define ISRELATION(x) \
2041 ((x) >= EQUAL && (x) <= IS)
2043 static oberon_expr_t
*
2044 oberon_expr(oberon_context_t
* ctx
)
2046 oberon_expr_t
* expr
;
2048 expr
= oberon_simple_expr(ctx
);
2049 while(ISRELATION(ctx
-> token
))
2051 int token
= ctx
-> token
;
2052 oberon_read_token(ctx
);
2054 oberon_expr_t
* inter
= oberon_simple_expr(ctx
);
2055 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2062 oberon_is_const(oberon_expr_t
* expr
)
2064 if(expr
-> is_item
== false)
2069 switch(expr
-> item
.mode
)
2091 oberon_check_const(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2093 if(!oberon_is_const(expr
))
2095 oberon_error(ctx
, "const expression are required");
2099 static oberon_item_t
*
2100 oberon_const_expr(oberon_context_t
* ctx
)
2102 oberon_expr_t
* expr
;
2103 expr
= oberon_expr(ctx
);
2104 oberon_check_const(ctx
, expr
);
2105 return (oberon_item_t
*) expr
;
2108 // =======================================================================
2110 // =======================================================================
2112 static void oberon_decl_seq(oberon_context_t
* ctx
);
2113 static void oberon_statement_seq(oberon_context_t
* ctx
);
2114 static void oberon_initialize_decl(oberon_context_t
* ctx
);
2117 oberon_expect_token(oberon_context_t
* ctx
, int token
)
2119 if(ctx
-> token
!= token
)
2121 oberon_error(ctx
, "unexpected token %i (%i)", ctx
-> token
, token
);
2126 oberon_assert_token(oberon_context_t
* ctx
, int token
)
2128 oberon_expect_token(ctx
, token
);
2129 oberon_read_token(ctx
);
2133 oberon_assert_ident(oberon_context_t
* ctx
)
2135 oberon_expect_token(ctx
, IDENT
);
2136 char * ident
= ctx
-> string
;
2137 oberon_read_token(ctx
);
2142 oberon_def(oberon_context_t
* ctx
, int * export
, int * read_only
)
2144 switch(ctx
-> token
)
2147 oberon_assert_token(ctx
, STAR
);
2152 oberon_assert_token(ctx
, MINUS
);
2163 static oberon_object_t
*
2164 oberon_ident_def(oberon_context_t
* ctx
, int class, bool check_upscope
)
2169 oberon_object_t
* x
;
2171 name
= oberon_assert_ident(ctx
);
2172 oberon_def(ctx
, &export
, &read_only
);
2174 x
= oberon_define_object(ctx
-> decl
, name
, class, export
, read_only
, check_upscope
);
2179 oberon_ident_list(oberon_context_t
* ctx
, int class, bool check_upscope
, int * num
, oberon_object_t
** list
)
2182 *list
= oberon_ident_def(ctx
, class, check_upscope
);
2183 while(ctx
-> token
== COMMA
)
2185 oberon_assert_token(ctx
, COMMA
);
2186 oberon_ident_def(ctx
, class, check_upscope
);
2192 oberon_var_decl(oberon_context_t
* ctx
)
2195 oberon_object_t
* list
;
2196 oberon_type_t
* type
;
2197 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2199 oberon_ident_list(ctx
, OBERON_CLASS_VAR
, false, &num
, &list
);
2200 oberon_assert_token(ctx
, COLON
);
2201 oberon_type(ctx
, &type
);
2203 oberon_object_t
* var
= list
;
2204 for(int i
= 0; i
< num
; i
++)
2211 static oberon_object_t
*
2212 oberon_fp_section(oberon_context_t
* ctx
, int * num_decl
)
2214 int class = OBERON_CLASS_PARAM
;
2215 if(ctx
-> token
== VAR
)
2217 oberon_read_token(ctx
);
2218 class = OBERON_CLASS_VAR_PARAM
;
2222 oberon_object_t
* list
;
2223 oberon_ident_list(ctx
, class, false, &num
, &list
);
2225 oberon_assert_token(ctx
, COLON
);
2227 oberon_type_t
* type
;
2228 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2229 oberon_type(ctx
, &type
);
2231 oberon_object_t
* param
= list
;
2232 for(int i
= 0; i
< num
; i
++)
2234 param
-> type
= type
;
2235 param
= param
-> next
;
2242 #define ISFPSECTION \
2243 ((ctx -> token == VAR) || (ctx -> token == IDENT))
2246 oberon_formal_pars(oberon_context_t
* ctx
, oberon_type_t
* signature
)
2248 oberon_assert_token(ctx
, LPAREN
);
2252 signature
-> decl
= oberon_fp_section(ctx
, &signature
-> num_decl
);
2253 while(ctx
-> token
== SEMICOLON
)
2255 oberon_assert_token(ctx
, SEMICOLON
);
2256 oberon_fp_section(ctx
, &signature
-> num_decl
);
2260 oberon_assert_token(ctx
, RPAREN
);
2262 if(ctx
-> token
== COLON
)
2264 oberon_assert_token(ctx
, COLON
);
2266 oberon_object_t
* typeobj
;
2267 typeobj
= oberon_qualident(ctx
, NULL
, 1);
2268 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2270 oberon_error(ctx
, "function result is not type");
2272 if(typeobj
-> type
-> class == OBERON_TYPE_RECORD
2273 || typeobj
-> type
-> class == OBERON_TYPE_ARRAY
)
2275 oberon_error(ctx
, "records or arrays could not be result of function");
2277 signature
-> base
= typeobj
-> type
;
2282 oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
)
2284 oberon_type_t
* signature
;
2286 signature
-> class = OBERON_TYPE_PROCEDURE
;
2287 signature
-> num_decl
= 0;
2288 signature
-> base
= ctx
-> notype_type
;
2289 signature
-> decl
= NULL
;
2291 if(ctx
-> token
== LPAREN
)
2293 oberon_formal_pars(ctx
, signature
);
2298 oberon_compare_signatures(oberon_context_t
* ctx
, oberon_type_t
* a
, oberon_type_t
* b
)
2300 if(a
-> num_decl
!= b
-> num_decl
)
2302 oberon_error(ctx
, "number parameters not matched");
2305 int num_param
= a
-> num_decl
;
2306 oberon_object_t
* param_a
= a
-> decl
;
2307 oberon_object_t
* param_b
= b
-> decl
;
2308 for(int i
= 0; i
< num_param
; i
++)
2310 if(strcmp(param_a
-> name
, param_b
-> name
) != 0)
2312 oberon_error(ctx
, "param %i name not matched", i
+ 1);
2315 if(param_a
-> type
!= param_b
-> type
)
2317 oberon_error(ctx
, "param %i type not matched", i
+ 1);
2320 param_a
= param_a
-> next
;
2321 param_b
= param_b
-> next
;
2326 oberon_make_return(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2328 oberon_object_t
* proc
= ctx
-> decl
-> parent
;
2329 oberon_type_t
* result_type
= proc
-> type
-> base
;
2331 if(result_type
-> class == OBERON_TYPE_NOTYPE
)
2335 oberon_error(ctx
, "procedure has no result type");
2342 oberon_error(ctx
, "procedure requires expression on result");
2345 oberon_check_src(ctx
, expr
);
2346 oberon_check_assignment_compatible(ctx
, expr
, result_type
);
2347 expr
= oberon_cast_expr(ctx
, expr
, result_type
);
2350 proc
-> has_return
= 1;
2352 oberon_generate_return(ctx
, expr
);
2356 oberon_proc_decl_body(oberon_context_t
* ctx
, oberon_object_t
* proc
)
2358 oberon_assert_token(ctx
, SEMICOLON
);
2360 ctx
-> decl
= proc
-> scope
;
2362 oberon_decl_seq(ctx
);
2364 oberon_generate_begin_proc(ctx
, proc
);
2366 if(ctx
-> token
== BEGIN
)
2368 oberon_assert_token(ctx
, BEGIN
);
2369 oberon_statement_seq(ctx
);
2372 oberon_assert_token(ctx
, END
);
2373 char * name
= oberon_assert_ident(ctx
);
2374 if(strcmp(name
, proc
-> name
) != 0)
2376 oberon_error(ctx
, "procedure name not matched");
2379 if(proc
-> type
-> base
-> class == OBERON_TYPE_NOTYPE
2380 && proc
-> has_return
== 0)
2382 oberon_make_return(ctx
, NULL
);
2385 if(proc
-> has_return
== 0)
2387 oberon_error(ctx
, "procedure requires return");
2390 oberon_generate_end_proc(ctx
);
2391 oberon_close_scope(ctx
-> decl
);
2395 oberon_proc_decl(oberon_context_t
* ctx
)
2397 oberon_assert_token(ctx
, PROCEDURE
);
2400 if(ctx
-> token
== UPARROW
)
2402 oberon_assert_token(ctx
, UPARROW
);
2409 name
= oberon_assert_ident(ctx
);
2410 oberon_def(ctx
, &export
, &read_only
);
2412 oberon_scope_t
* proc_scope
;
2413 proc_scope
= oberon_open_scope(ctx
);
2414 ctx
-> decl
-> local
= 1;
2416 oberon_type_t
* signature
;
2417 signature
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2418 oberon_opt_formal_pars(ctx
, &signature
);
2420 //oberon_initialize_decl(ctx);
2421 oberon_generator_init_type(ctx
, signature
);
2422 oberon_close_scope(ctx
-> decl
);
2424 oberon_object_t
* proc
;
2425 proc
= oberon_find_object(ctx
-> decl
, name
, 0);
2428 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, export
, read_only
, false);
2429 proc
-> type
= signature
;
2430 proc
-> scope
= proc_scope
;
2431 oberon_generator_init_proc(ctx
, proc
);
2435 if(proc
-> class != OBERON_CLASS_PROC
)
2437 oberon_error(ctx
, "mult definition");
2444 oberon_error(ctx
, "mult procedure definition");
2448 if(proc
-> export
!= export
|| proc
-> read_only
!= read_only
)
2450 oberon_error(ctx
, "export type not matched");
2453 oberon_compare_signatures(ctx
, proc
-> type
, signature
);
2456 proc_scope
-> parent
= proc
;
2457 oberon_object_t
* param
= proc_scope
-> list
-> next
;
2460 param
-> parent
= proc
;
2461 param
= param
-> next
;
2467 oberon_proc_decl_body(ctx
, proc
);
2472 oberon_const_decl(oberon_context_t
* ctx
)
2474 oberon_item_t
* value
;
2475 oberon_object_t
* constant
;
2477 constant
= oberon_ident_def(ctx
, OBERON_CLASS_CONST
, false);
2478 oberon_assert_token(ctx
, EQUAL
);
2479 value
= oberon_const_expr(ctx
);
2480 constant
-> value
= value
;
2484 oberon_make_array_type(oberon_context_t
* ctx
, oberon_expr_t
* size
, oberon_type_t
* base
, oberon_type_t
** type
)
2486 if(size
-> is_item
== 0)
2488 oberon_error(ctx
, "requires constant");
2491 if(size
-> item
.mode
!= MODE_INTEGER
)
2493 oberon_error(ctx
, "requires integer constant");
2496 oberon_type_t
* arr
;
2498 arr
-> class = OBERON_TYPE_ARRAY
;
2499 arr
-> size
= size
-> item
.integer
;
2504 oberon_qualident_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2507 oberon_object_t
* to
;
2509 to
= oberon_qualident(ctx
, &name
, 0);
2511 //name = oberon_assert_ident(ctx);
2512 //to = oberon_find_object(ctx -> decl, name, 0);
2516 if(to
-> class != OBERON_CLASS_TYPE
)
2518 oberon_error(ctx
, "not a type");
2523 to
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, false, false, false);
2524 to
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2530 static void oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
);
2533 * Правило граматики "type". Указатель type должен указывать на существующий объект!
2537 oberon_make_multiarray(oberon_context_t
* ctx
, oberon_expr_t
* sizes
, oberon_type_t
* base
, oberon_type_t
** type
)
2545 oberon_type_t
* dim
;
2546 dim
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2548 oberon_make_multiarray(ctx
, sizes
-> next
, base
, &dim
);
2550 oberon_make_array_type(ctx
, sizes
, dim
, type
);
2554 oberon_make_open_array(oberon_context_t
* ctx
, oberon_type_t
* base
, oberon_type_t
* type
)
2556 type
-> class = OBERON_TYPE_ARRAY
;
2558 type
-> base
= base
;
2562 oberon_field_list(oberon_context_t
* ctx
, oberon_type_t
* rec
, oberon_scope_t
* modscope
)
2564 if(ctx
-> token
== IDENT
)
2567 oberon_object_t
* list
;
2568 oberon_type_t
* type
;
2569 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2571 oberon_ident_list(ctx
, OBERON_CLASS_FIELD
, true, &num
, &list
);
2572 oberon_assert_token(ctx
, COLON
);
2574 oberon_scope_t
* current
= ctx
-> decl
;
2575 ctx
-> decl
= modscope
;
2576 oberon_type(ctx
, &type
);
2577 ctx
-> decl
= current
;
2579 oberon_object_t
* field
= list
;
2580 for(int i
= 0; i
< num
; i
++)
2582 field
-> type
= type
;
2583 field
= field
-> next
;
2586 rec
-> num_decl
+= num
;
2591 oberon_type_record_body(oberon_context_t
* ctx
, oberon_type_t
* rec
)
2593 oberon_scope_t
* modscope
= ctx
-> mod
-> decl
;
2594 oberon_scope_t
* oldscope
= ctx
-> decl
;
2595 ctx
-> decl
= modscope
;
2597 if(ctx
-> token
== LPAREN
)
2599 oberon_assert_token(ctx
, LPAREN
);
2601 oberon_object_t
* typeobj
;
2602 typeobj
= oberon_qualident(ctx
, NULL
, true);
2604 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2606 oberon_error(ctx
, "base must be type");
2609 oberon_type_t
* base
= typeobj
-> type
;
2610 if(base
-> class == OBERON_TYPE_POINTER
)
2612 base
= base
-> base
;
2615 if(base
-> class != OBERON_TYPE_RECORD
)
2617 oberon_error(ctx
, "base must be record type");
2621 ctx
-> decl
= base
-> scope
;
2623 oberon_assert_token(ctx
, RPAREN
);
2630 oberon_scope_t
* this_scope
;
2631 this_scope
= oberon_open_scope(ctx
);
2632 this_scope
-> local
= true;
2633 this_scope
-> parent
= NULL
;
2634 this_scope
-> parent_type
= rec
;
2636 oberon_field_list(ctx
, rec
, modscope
);
2637 while(ctx
-> token
== SEMICOLON
)
2639 oberon_assert_token(ctx
, SEMICOLON
);
2640 oberon_field_list(ctx
, rec
, modscope
);
2643 rec
-> scope
= this_scope
;
2644 rec
-> decl
= this_scope
-> list
-> next
;
2645 ctx
-> decl
= oldscope
;
2649 oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2651 if(ctx
-> token
== IDENT
)
2653 oberon_qualident_type(ctx
, type
);
2655 else if(ctx
-> token
== ARRAY
)
2657 oberon_assert_token(ctx
, ARRAY
);
2660 oberon_expr_t
* sizes
;
2662 if(ISEXPR(ctx
-> token
))
2664 oberon_expr_list(ctx
, &num_sizes
, &sizes
, 1);
2667 oberon_assert_token(ctx
, OF
);
2669 oberon_type_t
* base
;
2670 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2671 oberon_type(ctx
, &base
);
2675 oberon_make_open_array(ctx
, base
, *type
);
2679 oberon_make_multiarray(ctx
, sizes
, base
, type
);
2682 else if(ctx
-> token
== RECORD
)
2684 oberon_type_t
* rec
;
2686 rec
-> class = OBERON_TYPE_RECORD
;
2687 rec
-> module
= ctx
-> mod
;
2689 oberon_assert_token(ctx
, RECORD
);
2690 oberon_type_record_body(ctx
, rec
);
2691 oberon_assert_token(ctx
, END
);
2695 else if(ctx
-> token
== POINTER
)
2697 oberon_assert_token(ctx
, POINTER
);
2698 oberon_assert_token(ctx
, TO
);
2700 oberon_type_t
* base
;
2701 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2702 oberon_type(ctx
, &base
);
2704 oberon_type_t
* ptr
;
2706 ptr
-> class = OBERON_TYPE_POINTER
;
2709 else if(ctx
-> token
== PROCEDURE
)
2711 oberon_open_scope(ctx
);
2712 oberon_assert_token(ctx
, PROCEDURE
);
2713 oberon_opt_formal_pars(ctx
, type
);
2714 oberon_close_scope(ctx
-> decl
);
2718 oberon_error(ctx
, "invalid type declaration");
2723 oberon_type_decl(oberon_context_t
* ctx
)
2726 oberon_object_t
* newtype
;
2727 oberon_type_t
* type
;
2731 name
= oberon_assert_ident(ctx
);
2732 oberon_def(ctx
, &export
, &read_only
);
2734 newtype
= oberon_find_object(ctx
-> decl
, name
, 0);
2737 newtype
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, export
, read_only
, false);
2738 newtype
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2739 assert(newtype
-> type
);
2743 if(newtype
-> class != OBERON_CLASS_TYPE
)
2745 oberon_error(ctx
, "mult definition");
2748 if(newtype
-> linked
)
2750 oberon_error(ctx
, "mult definition - already linked");
2753 newtype
-> export
= export
;
2754 newtype
-> read_only
= read_only
;
2757 oberon_assert_token(ctx
, EQUAL
);
2759 type
= newtype
-> type
;
2760 oberon_type(ctx
, &type
);
2762 if(type
-> class == OBERON_TYPE_NOTYPE
)
2764 oberon_error(ctx
, "recursive alias declaration");
2767 newtype
-> type
= type
;
2768 newtype
-> linked
= 1;
2771 static void oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2772 static void oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2775 oberon_prevent_recursive_pointer(oberon_context_t
* ctx
, oberon_type_t
* type
)
2777 if(type
-> class != OBERON_TYPE_POINTER
2778 && type
-> class != OBERON_TYPE_ARRAY
)
2783 if(type
-> recursive
)
2785 oberon_error(ctx
, "recursive pointer declaration");
2788 if(type
-> class == OBERON_TYPE_POINTER
2789 && type
-> base
-> class == OBERON_TYPE_POINTER
)
2791 oberon_error(ctx
, "attempt to make pointer to pointer");
2794 type
-> recursive
= 1;
2796 oberon_prevent_recursive_pointer(ctx
, type
-> base
);
2798 type
-> recursive
= 0;
2802 oberon_prevent_recursive_record(oberon_context_t
* ctx
, oberon_type_t
* type
)
2804 if(type
-> class != OBERON_TYPE_RECORD
)
2809 if(type
-> recursive
)
2811 oberon_error(ctx
, "recursive record declaration");
2814 type
-> recursive
= 1;
2818 oberon_prevent_recursive_record(ctx
, type
-> base
);
2821 int num_fields
= type
-> num_decl
;
2822 oberon_object_t
* field
= type
-> decl
;
2823 for(int i
= 0; i
< num_fields
; i
++)
2825 oberon_prevent_recursive_object(ctx
, field
);
2826 field
= field
-> next
;
2829 type
-> recursive
= 0;
2832 oberon_prevent_recursive_procedure(oberon_context_t
* ctx
, oberon_type_t
* type
)
2834 if(type
-> class != OBERON_TYPE_PROCEDURE
)
2839 if(type
-> recursive
)
2841 oberon_error(ctx
, "recursive procedure declaration");
2844 type
-> recursive
= 1;
2846 int num_fields
= type
-> num_decl
;
2847 oberon_object_t
* field
= type
-> decl
;
2848 for(int i
= 0; i
< num_fields
; i
++)
2850 oberon_prevent_recursive_object(ctx
, field
);
2851 field
= field
-> next
;
2854 type
-> recursive
= 0;
2858 oberon_prevent_recursive_array(oberon_context_t
* ctx
, oberon_type_t
* type
)
2860 if(type
-> class != OBERON_TYPE_ARRAY
)
2865 if(type
-> recursive
)
2867 oberon_error(ctx
, "recursive array declaration");
2870 type
-> recursive
= 1;
2872 oberon_prevent_recursive_type(ctx
, type
-> base
);
2874 type
-> recursive
= 0;
2878 oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2880 if(type
-> class == OBERON_TYPE_POINTER
)
2882 oberon_prevent_recursive_pointer(ctx
, type
);
2884 else if(type
-> class == OBERON_TYPE_RECORD
)
2886 oberon_prevent_recursive_record(ctx
, type
);
2888 else if(type
-> class == OBERON_TYPE_ARRAY
)
2890 oberon_prevent_recursive_array(ctx
, type
);
2892 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2894 oberon_prevent_recursive_procedure(ctx
, type
);
2899 oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2903 case OBERON_CLASS_VAR
:
2904 case OBERON_CLASS_TYPE
:
2905 case OBERON_CLASS_PARAM
:
2906 case OBERON_CLASS_VAR_PARAM
:
2907 case OBERON_CLASS_FIELD
:
2908 oberon_prevent_recursive_type(ctx
, x
-> type
);
2910 case OBERON_CLASS_CONST
:
2911 case OBERON_CLASS_PROC
:
2912 case OBERON_CLASS_MODULE
:
2915 oberon_error(ctx
, "oberon_prevent_recursive_object: wat");
2921 oberon_prevent_recursive_decl(oberon_context_t
* ctx
)
2923 oberon_object_t
* x
= ctx
-> decl
-> list
-> next
;
2927 oberon_prevent_recursive_object(ctx
, x
);
2932 static void oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2933 static void oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2936 oberon_initialize_record_fields(oberon_context_t
* ctx
, oberon_type_t
* type
)
2938 if(type
-> class != OBERON_TYPE_RECORD
)
2943 int num_fields
= type
-> num_decl
;
2944 oberon_object_t
* field
= type
-> decl
;
2945 for(int i
= 0; i
< num_fields
; i
++)
2947 if(field
-> type
-> class == OBERON_TYPE_POINTER
)
2949 oberon_initialize_type(ctx
, field
-> type
);
2952 oberon_initialize_object(ctx
, field
);
2953 field
= field
-> next
;
2956 oberon_generator_init_record(ctx
, type
);
2960 oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2962 if(type
-> class == OBERON_TYPE_NOTYPE
)
2964 oberon_error(ctx
, "undeclarated type");
2967 if(type
-> initialized
)
2972 type
-> initialized
= 1;
2974 if(type
-> class == OBERON_TYPE_POINTER
)
2976 oberon_initialize_type(ctx
, type
-> base
);
2977 oberon_generator_init_type(ctx
, type
);
2979 else if(type
-> class == OBERON_TYPE_ARRAY
)
2981 if(type
-> size
!= 0)
2983 if(type
-> base
-> class == OBERON_TYPE_ARRAY
)
2985 if(type
-> base
-> size
== 0)
2987 oberon_error(ctx
, "open array not allowed as array element");
2992 oberon_initialize_type(ctx
, type
-> base
);
2993 oberon_generator_init_type(ctx
, type
);
2995 else if(type
-> class == OBERON_TYPE_RECORD
)
2997 oberon_generator_init_type(ctx
, type
);
2998 oberon_initialize_record_fields(ctx
, type
);
3000 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
3002 int num_fields
= type
-> num_decl
;
3003 oberon_object_t
* field
= type
-> decl
;
3004 for(int i
= 0; i
< num_fields
; i
++)
3006 //oberon_initialize_object(ctx, field);
3007 oberon_initialize_type(ctx
, field
-> type
);
3008 field
= field
-> next
;
3011 oberon_generator_init_type(ctx
, type
);
3015 oberon_generator_init_type(ctx
, type
);
3020 oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
3022 if(x
-> initialized
)
3027 x
-> initialized
= 1;
3031 case OBERON_CLASS_TYPE
:
3032 oberon_initialize_type(ctx
, x
-> type
);
3034 case OBERON_CLASS_VAR
:
3035 case OBERON_CLASS_FIELD
:
3036 if(x
-> type
-> class == OBERON_TYPE_ARRAY
)
3038 if(x
-> type
-> size
== 0)
3040 oberon_error(ctx
, "open array not allowed as variable or field");
3043 oberon_initialize_type(ctx
, x
-> type
);
3044 oberon_generator_init_var(ctx
, x
);
3046 case OBERON_CLASS_PARAM
:
3047 case OBERON_CLASS_VAR_PARAM
:
3048 oberon_initialize_type(ctx
, x
-> type
);
3049 oberon_generator_init_var(ctx
, x
);
3051 case OBERON_CLASS_CONST
:
3052 case OBERON_CLASS_PROC
:
3053 case OBERON_CLASS_MODULE
:
3056 oberon_error(ctx
, "oberon_initialize_object: wat");
3062 oberon_initialize_decl(oberon_context_t
* ctx
)
3064 oberon_object_t
* x
= ctx
-> decl
-> list
;
3068 oberon_initialize_object(ctx
, x
-> next
);
3074 oberon_prevent_undeclarated_procedures(oberon_context_t
* ctx
)
3076 oberon_object_t
* x
= ctx
-> decl
-> list
;
3080 if(x
-> next
-> class == OBERON_CLASS_PROC
)
3082 if(x
-> next
-> linked
== 0)
3084 oberon_error(ctx
, "unresolved forward declaration");
3092 oberon_decl_seq(oberon_context_t
* ctx
)
3094 if(ctx
-> token
== CONST
)
3096 oberon_assert_token(ctx
, CONST
);
3097 while(ctx
-> token
== IDENT
)
3099 oberon_const_decl(ctx
);
3100 oberon_assert_token(ctx
, SEMICOLON
);
3104 if(ctx
-> token
== TYPE
)
3106 oberon_assert_token(ctx
, TYPE
);
3107 while(ctx
-> token
== IDENT
)
3109 oberon_type_decl(ctx
);
3110 oberon_assert_token(ctx
, SEMICOLON
);
3114 if(ctx
-> token
== VAR
)
3116 oberon_assert_token(ctx
, VAR
);
3117 while(ctx
-> token
== IDENT
)
3119 oberon_var_decl(ctx
);
3120 oberon_assert_token(ctx
, SEMICOLON
);
3124 oberon_prevent_recursive_decl(ctx
);
3125 oberon_initialize_decl(ctx
);
3127 while(ctx
-> token
== PROCEDURE
)
3129 oberon_proc_decl(ctx
);
3130 oberon_assert_token(ctx
, SEMICOLON
);
3133 oberon_prevent_undeclarated_procedures(ctx
);
3136 static oberon_expr_t
*
3137 oberon_make_temp_var_item(oberon_context_t
* ctx
, oberon_type_t
* type
)
3139 oberon_object_t
* x
;
3140 oberon_expr_t
* expr
;
3142 x
= oberon_create_object(ctx
-> decl
, "TEMP", OBERON_CLASS_VAR
, false, false);
3145 oberon_generator_init_temp_var(ctx
, x
);
3147 expr
= oberon_new_item(MODE_VAR
, type
, false);
3148 expr
-> item
.var
= x
;
3153 oberon_statement_seq(oberon_context_t
* ctx
);
3156 oberon_assign(oberon_context_t
* ctx
, oberon_expr_t
* src
, oberon_expr_t
* dst
)
3158 oberon_check_dst(ctx
, dst
);
3159 oberon_check_assignment_compatible(ctx
, src
, dst
-> result
);
3161 if(oberon_is_array_of_char_type(dst
-> result
)
3162 && oberon_is_string_type(src
-> result
))
3165 oberon_make_copy_call(ctx
, 2, src
);
3169 src
= oberon_cast_expr(ctx
, src
, dst
-> result
);
3170 oberon_generate_assign(ctx
, src
, dst
);
3174 static oberon_expr_t
*
3175 oberon_case_labels(oberon_context_t
* ctx
, oberon_expr_t
* val
)
3179 oberon_expr_t
* cond
;
3180 oberon_expr_t
* cond2
;
3182 e1
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3185 if(ctx
-> token
== DOTDOT
)
3187 oberon_assert_token(ctx
, DOTDOT
);
3188 e2
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3194 cond
= oberon_make_bin_op(ctx
, EQUAL
, val
, e1
);
3198 /* val >= e1 && val <= e2 */
3199 cond
= oberon_make_bin_op(ctx
, GEQ
, val
, e1
);
3200 cond2
= oberon_make_bin_op(ctx
, LEQ
, val
, e2
);
3201 cond
= oberon_make_bin_op(ctx
, AND
, cond
, cond2
);
3208 oberon_case(oberon_context_t
* ctx
, oberon_expr_t
* val
, gen_label_t
* end
)
3210 oberon_expr_t
* cond
;
3211 oberon_expr_t
* cond2
;
3212 gen_label_t
* this_end
;
3214 if(ISEXPR(ctx
-> token
))
3216 this_end
= oberon_generator_reserve_label(ctx
);
3218 cond
= oberon_case_labels(ctx
, val
);
3219 while(ctx
-> token
== COMMA
)
3221 oberon_assert_token(ctx
, COMMA
);
3223 cond2
= oberon_case_labels(ctx
, val
);
3224 cond
= oberon_make_bin_op(ctx
, OR
, cond
, cond2
);
3226 oberon_assert_token(ctx
, COLON
);
3228 oberon_generate_branch(ctx
, cond
, false, this_end
);
3229 oberon_statement_seq(ctx
);
3230 oberon_generate_goto(ctx
, end
);
3232 oberon_generate_label(ctx
, this_end
);
3237 oberon_case_statement(oberon_context_t
* ctx
)
3239 oberon_expr_t
* val
;
3240 oberon_expr_t
* expr
;
3243 end
= oberon_generator_reserve_label(ctx
);
3245 oberon_assert_token(ctx
, CASE
);
3246 expr
= oberon_expr(ctx
);
3247 val
= oberon_make_temp_var_item(ctx
, expr
-> result
);
3248 oberon_assign(ctx
, expr
, val
);
3249 oberon_assert_token(ctx
, OF
);
3250 oberon_case(ctx
, val
, end
);
3251 while(ctx
-> token
== BAR
)
3253 oberon_assert_token(ctx
, BAR
);
3254 oberon_case(ctx
, val
, end
);
3257 if(ctx
-> token
== ELSE
)
3259 oberon_assert_token(ctx
, ELSE
);
3260 oberon_statement_seq(ctx
);
3264 oberon_generate_trap(ctx
, -1);
3267 oberon_generate_label(ctx
, end
);
3268 oberon_assert_token(ctx
, END
);
3272 oberon_with_guard_do(oberon_context_t
* ctx
, gen_label_t
* end
)
3274 oberon_expr_t
* val
;
3275 oberon_expr_t
* var
;
3276 oberon_expr_t
* type
;
3277 oberon_expr_t
* cond
;
3278 oberon_expr_t
* cast
;
3279 oberon_type_t
* old_type
;
3280 gen_var_t
* old_var
;
3281 gen_label_t
* this_end
;
3283 this_end
= oberon_generator_reserve_label(ctx
);
3285 var
= oberon_qualident_expr(ctx
);
3286 oberon_assert_token(ctx
, COLON
);
3287 type
= oberon_qualident_expr(ctx
);
3288 cond
= oberon_make_bin_op(ctx
, IS
, var
, type
);
3290 oberon_assert_token(ctx
, DO
);
3291 oberon_generate_branch(ctx
, cond
, false, this_end
);
3293 /* Сохраняем ссылку во временной переменной */
3294 val
= oberon_make_temp_var_item(ctx
, type
-> result
);
3295 //cast = oberno_make_record_cast(ctx, var, type -> result);
3296 cast
= oberon_cast_expr(ctx
, var
, type
-> result
);
3297 oberon_assign(ctx
, cast
, val
);
3298 /* Подменяем тип у оригинальной переменной */
3299 old_type
= var
-> item
.var
-> type
;
3300 var
-> item
.var
-> type
= type
-> result
;
3301 /* Подменяем ссылку на переменную */
3302 old_var
= var
-> item
.var
-> gen_var
;
3303 var
-> item
.var
-> gen_var
= val
-> item
.var
-> gen_var
;
3305 oberon_statement_seq(ctx
);
3306 oberon_generate_goto(ctx
, end
);
3307 oberon_generate_label(ctx
, this_end
);
3309 /* Возвращаем исходное состояние */
3310 var
-> item
.var
-> gen_var
= old_var
;
3311 var
-> item
.var
-> type
= old_type
;
3315 oberon_with_statement(oberon_context_t
* ctx
)
3318 end
= oberon_generator_reserve_label(ctx
);
3320 oberon_assert_token(ctx
, WITH
);
3321 oberon_with_guard_do(ctx
, end
);
3322 while(ctx
-> token
== BAR
)
3324 oberon_assert_token(ctx
, BAR
);
3325 oberon_with_guard_do(ctx
, end
);
3328 if(ctx
-> token
== ELSE
)
3330 oberon_assert_token(ctx
, ELSE
);
3331 oberon_statement_seq(ctx
);
3335 oberon_generate_trap(ctx
, -2);
3338 oberon_generate_label(ctx
, end
);
3339 oberon_assert_token(ctx
, END
);
3343 oberon_statement(oberon_context_t
* ctx
)
3345 oberon_expr_t
* item1
;
3346 oberon_expr_t
* item2
;
3348 if(ctx
-> token
== IDENT
)
3350 item1
= oberon_designator(ctx
);
3351 if(ctx
-> token
== ASSIGN
)
3353 oberon_assert_token(ctx
, ASSIGN
);
3354 item2
= oberon_expr(ctx
);
3355 oberon_assign(ctx
, item2
, item1
);
3359 oberon_opt_proc_parens(ctx
, item1
);
3362 else if(ctx
-> token
== IF
)
3366 oberon_expr_t
* cond
;
3368 els
= oberon_generator_reserve_label(ctx
);
3369 end
= oberon_generator_reserve_label(ctx
);
3371 oberon_assert_token(ctx
, IF
);
3372 cond
= oberon_expr(ctx
);
3373 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3375 oberon_error(ctx
, "condition must be boolean");
3377 oberon_assert_token(ctx
, THEN
);
3378 oberon_generate_branch(ctx
, cond
, false, els
);
3379 oberon_statement_seq(ctx
);
3380 oberon_generate_goto(ctx
, end
);
3381 oberon_generate_label(ctx
, els
);
3383 while(ctx
-> token
== ELSIF
)
3385 els
= oberon_generator_reserve_label(ctx
);
3387 oberon_assert_token(ctx
, ELSIF
);
3388 cond
= oberon_expr(ctx
);
3389 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3391 oberon_error(ctx
, "condition must be boolean");
3393 oberon_assert_token(ctx
, THEN
);
3394 oberon_generate_branch(ctx
, cond
, false, els
);
3395 oberon_statement_seq(ctx
);
3396 oberon_generate_goto(ctx
, end
);
3397 oberon_generate_label(ctx
, els
);
3400 if(ctx
-> token
== ELSE
)
3402 oberon_assert_token(ctx
, ELSE
);
3403 oberon_statement_seq(ctx
);
3406 oberon_generate_label(ctx
, end
);
3407 oberon_assert_token(ctx
, END
);
3409 else if(ctx
-> token
== WHILE
)
3411 gen_label_t
* begin
;
3413 oberon_expr_t
* cond
;
3415 begin
= oberon_generator_reserve_label(ctx
);
3416 end
= oberon_generator_reserve_label(ctx
);
3418 oberon_assert_token(ctx
, WHILE
);
3419 oberon_generate_label(ctx
, begin
);
3420 cond
= oberon_expr(ctx
);
3421 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3423 oberon_error(ctx
, "condition must be boolean");
3425 oberon_generate_branch(ctx
, cond
, false, end
);
3427 oberon_assert_token(ctx
, DO
);
3428 oberon_statement_seq(ctx
);
3429 oberon_generate_goto(ctx
, begin
);
3431 oberon_assert_token(ctx
, END
);
3432 oberon_generate_label(ctx
, end
);
3434 else if(ctx
-> token
== REPEAT
)
3436 gen_label_t
* begin
;
3437 oberon_expr_t
* cond
;
3439 begin
= oberon_generator_reserve_label(ctx
);
3440 oberon_generate_label(ctx
, begin
);
3441 oberon_assert_token(ctx
, REPEAT
);
3443 oberon_statement_seq(ctx
);
3445 oberon_assert_token(ctx
, UNTIL
);
3447 cond
= oberon_expr(ctx
);
3448 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3450 oberon_error(ctx
, "condition must be boolean");
3453 oberon_generate_branch(ctx
, cond
, true, begin
);
3455 else if(ctx
-> token
== FOR
)
3457 oberon_expr_t
* from
;
3458 oberon_expr_t
* index
;
3460 oberon_expr_t
* bound
;
3462 oberon_expr_t
* cond
;
3463 oberon_expr_t
* count
;
3464 gen_label_t
* begin
;
3469 begin
= oberon_generator_reserve_label(ctx
);
3470 end
= oberon_generator_reserve_label(ctx
);
3472 oberon_assert_token(ctx
, FOR
);
3473 iname
= oberon_assert_ident(ctx
);
3474 index
= oberon_ident_item(ctx
, iname
);
3475 oberon_assert_token(ctx
, ASSIGN
);
3476 from
= oberon_expr(ctx
);
3477 oberon_assert_token(ctx
, TO
);
3478 bound
= oberon_make_temp_var_item(ctx
, index
-> result
);
3479 to
= oberon_expr(ctx
);
3480 oberon_assign(ctx
, to
, bound
); // сначала temp
3481 oberon_assign(ctx
, from
, index
); // потом i
3482 if(ctx
-> token
== BY
)
3484 oberon_assert_token(ctx
, BY
);
3485 by
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3489 by
= oberon_make_integer(ctx
, 1);
3492 if(by
-> result
-> class != OBERON_TYPE_INTEGER
)
3494 oberon_error(ctx
, "must be integer");
3497 if(by
-> item
.integer
> 0)
3501 else if(by
-> item
.integer
< 0)
3507 oberon_error(ctx
, "zero step not allowed");
3510 oberon_assert_token(ctx
, DO
);
3511 oberon_generate_label(ctx
, begin
);
3512 cond
= oberon_make_bin_op(ctx
, op
, index
, bound
);
3513 oberon_generate_branch(ctx
, cond
, false, end
);
3514 oberon_statement_seq(ctx
);
3515 count
= oberon_make_bin_op(ctx
, PLUS
, index
, by
);
3516 oberon_assign(ctx
, count
, index
);
3517 oberon_generate_goto(ctx
, begin
);
3518 oberon_generate_label(ctx
, end
);
3519 oberon_assert_token(ctx
, END
);
3521 else if(ctx
-> token
== LOOP
)
3523 gen_label_t
* begin
;
3526 begin
= oberon_generator_reserve_label(ctx
);
3527 end
= oberon_generator_reserve_label(ctx
);
3529 oberon_open_scope(ctx
);
3530 oberon_assert_token(ctx
, LOOP
);
3531 oberon_generate_label(ctx
, begin
);
3532 ctx
-> decl
-> exit_label
= end
;
3533 oberon_statement_seq(ctx
);
3534 oberon_generate_goto(ctx
, begin
);
3535 oberon_generate_label(ctx
, end
);
3536 oberon_assert_token(ctx
, END
);
3537 oberon_close_scope(ctx
-> decl
);
3539 else if(ctx
-> token
== EXIT
)
3541 oberon_assert_token(ctx
, EXIT
);
3542 if(ctx
-> decl
-> exit_label
== NULL
)
3544 oberon_error(ctx
, "not in LOOP-END");
3546 oberon_generate_goto(ctx
, ctx
-> decl
-> exit_label
);
3548 else if(ctx
-> token
== CASE
)
3550 oberon_case_statement(ctx
);
3552 else if(ctx
-> token
== WITH
)
3554 oberon_with_statement(ctx
);
3556 else if(ctx
-> token
== RETURN
)
3558 oberon_assert_token(ctx
, RETURN
);
3559 if(ISEXPR(ctx
-> token
))
3561 oberon_expr_t
* expr
;
3562 expr
= oberon_expr(ctx
);
3563 oberon_make_return(ctx
, expr
);
3567 oberon_make_return(ctx
, NULL
);
3573 oberon_statement_seq(oberon_context_t
* ctx
)
3575 oberon_statement(ctx
);
3576 while(ctx
-> token
== SEMICOLON
)
3578 oberon_assert_token(ctx
, SEMICOLON
);
3579 oberon_statement(ctx
);
3584 oberon_import_module(oberon_context_t
* ctx
, char * alias
, char * name
)
3586 oberon_module_t
* m
= ctx
-> module_list
;
3587 while(m
&& strcmp(m
-> name
, name
) != 0)
3594 oberon_scanner_t
* s
;
3595 s
= ctx
-> import_module(name
);
3598 oberon_error(ctx
, "no such module %s", name
);
3601 m
= oberon_compile_module(ctx
, s
);
3607 oberon_error(ctx
, "cyclic module import");
3610 oberon_object_t
* ident
;
3611 ident
= oberon_define_object(ctx
-> decl
, alias
, OBERON_CLASS_MODULE
, false, false, false);
3612 ident
-> module
= m
;
3616 oberon_import_decl(oberon_context_t
* ctx
)
3621 alias
= name
= oberon_assert_ident(ctx
);
3622 if(ctx
-> token
== ASSIGN
)
3624 oberon_assert_token(ctx
, ASSIGN
);
3625 name
= oberon_assert_ident(ctx
);
3628 oberon_import_module(ctx
, alias
, name
);
3632 oberon_import_list(oberon_context_t
* ctx
)
3634 oberon_assert_token(ctx
, IMPORT
);
3636 oberon_import_decl(ctx
);
3637 while(ctx
-> token
== COMMA
)
3639 oberon_assert_token(ctx
, COMMA
);
3640 oberon_import_decl(ctx
);
3643 oberon_assert_token(ctx
, SEMICOLON
);
3647 oberon_parse_module(oberon_context_t
* ctx
)
3651 oberon_read_token(ctx
);
3653 oberon_assert_token(ctx
, MODULE
);
3654 name1
= oberon_assert_ident(ctx
);
3655 oberon_assert_token(ctx
, SEMICOLON
);
3656 ctx
-> mod
-> name
= name1
;
3658 oberon_generator_init_module(ctx
, ctx
-> mod
);
3660 if(ctx
-> token
== IMPORT
)
3662 oberon_import_list(ctx
);
3665 oberon_decl_seq(ctx
);
3667 oberon_generate_begin_module(ctx
);
3668 if(ctx
-> token
== BEGIN
)
3670 oberon_assert_token(ctx
, BEGIN
);
3671 oberon_statement_seq(ctx
);
3673 oberon_generate_end_module(ctx
);
3675 oberon_assert_token(ctx
, END
);
3676 name2
= oberon_assert_ident(ctx
);
3677 oberon_expect_token(ctx
, DOT
);
3679 if(strcmp(name1
, name2
) != 0)
3681 oberon_error(ctx
, "module name not matched");
3684 oberon_generator_fini_module(ctx
-> mod
);
3687 // =======================================================================
3689 // =======================================================================
3691 static oberon_expr_t
*
3692 oberon_make_min_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3696 oberon_error(ctx
, "too few arguments");
3701 oberon_error(ctx
, "too mach arguments");
3704 oberon_expr_t
* arg
;
3707 if(!oberon_is_type_expr(arg
))
3709 oberon_error(ctx
, "MIN accept only type");
3712 oberon_expr_t
* expr
;
3713 int bits
= arg
-> result
-> size
* 8;
3714 switch(arg
-> result
-> class)
3716 case OBERON_TYPE_INTEGER
:
3717 expr
= oberon_make_integer(ctx
, -powl(2, bits
- 1));
3719 case OBERON_TYPE_BOOLEAN
:
3720 expr
= oberon_make_boolean(ctx
, false);
3722 case OBERON_TYPE_CHAR
:
3723 expr
= oberon_make_char(ctx
, 0);
3725 case OBERON_TYPE_REAL
:
3726 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (-FLT_MAX
) : (-DBL_MAX
), arg
-> result
);
3728 case OBERON_TYPE_SET
:
3729 expr
= oberon_make_integer(ctx
, 0);
3732 oberon_error(ctx
, "allowed only basic types");
3739 static oberon_expr_t
*
3740 oberon_make_max_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3744 oberon_error(ctx
, "too few arguments");
3749 oberon_error(ctx
, "too mach arguments");
3752 oberon_expr_t
* arg
;
3755 if(!oberon_is_type_expr(arg
))
3757 oberon_error(ctx
, "MAX accept only type");
3760 oberon_expr_t
* expr
;
3761 int bits
= arg
-> result
-> size
* 8;
3762 switch(arg
-> result
-> class)
3764 case OBERON_TYPE_INTEGER
:
3765 expr
= oberon_make_integer(ctx
, powl(2, bits
- 1) - 1);
3767 case OBERON_TYPE_BOOLEAN
:
3768 expr
= oberon_make_boolean(ctx
, true);
3770 case OBERON_TYPE_CHAR
:
3771 expr
= oberon_make_char(ctx
, powl(2, bits
) - 1);
3773 case OBERON_TYPE_REAL
:
3774 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (FLT_MAX
) : (DBL_MAX
), arg
-> result
);
3776 case OBERON_TYPE_SET
:
3777 expr
= oberon_make_integer(ctx
, bits
);
3780 oberon_error(ctx
, "allowed only basic types");
3787 static oberon_expr_t
*
3788 oberon_make_size_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3792 oberon_error(ctx
, "too few arguments");
3797 oberon_error(ctx
, "too mach arguments");
3800 oberon_expr_t
* arg
;
3802 if(!oberon_is_type_expr(arg
))
3804 oberon_error(ctx
, "SIZE accept only type");
3808 oberon_expr_t
* expr
;
3809 oberon_type_t
* type
= arg
-> result
;
3810 switch(type
-> class)
3812 case OBERON_TYPE_INTEGER
:
3813 case OBERON_TYPE_BOOLEAN
:
3814 case OBERON_TYPE_REAL
:
3815 case OBERON_TYPE_CHAR
:
3816 case OBERON_TYPE_SET
:
3817 size
= type
-> size
;
3820 oberon_error(ctx
, "TODO SIZE");
3824 expr
= oberon_make_integer(ctx
, size
);
3828 static oberon_expr_t
*
3829 oberon_make_abs_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3833 oberon_error(ctx
, "too few arguments");
3838 oberon_error(ctx
, "too mach arguments");
3841 oberon_expr_t
* arg
;
3843 oberon_check_src(ctx
, arg
);
3845 if(oberon_is_number_type(arg
-> result
))
3847 oberon_error(ctx
, "ABS accepts only numbers");
3850 oberon_expr_t
* expr
;
3851 if(oberon_is_const(arg
))
3853 if(oberon_is_real_type(arg
-> result
))
3855 double x
= arg
-> item
.real
;
3856 expr
= oberon_make_real(ctx
, fabsl(x
), arg
-> result
);
3860 int64_t x
= arg
-> item
.integer
;
3861 expr
= oberon_make_integer(ctx
, llabs(x
));
3866 expr
= oberon_new_operator(OP_ABS
, arg
-> result
, arg
, NULL
);
3872 oberon_make_inc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3876 oberon_error(ctx
, "too few arguments");
3881 oberon_error(ctx
, "too mach arguments");
3884 oberon_expr_t
* dst
;
3886 oberon_check_dst(ctx
, dst
);
3888 if(!oberon_is_integer_type(dst
-> result
))
3890 oberon_error(ctx
, "expect integer");
3893 oberon_expr_t
* expr
;
3894 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_make_integer(ctx
, 1));
3895 oberon_assign(ctx
, expr
, dst
);
3899 oberon_make_incl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3903 oberon_error(ctx
, "too few arguments");
3908 oberon_error(ctx
, "too mach arguments");
3911 oberon_expr_t
* dst
;
3913 oberon_check_dst(ctx
, dst
);
3915 if(!oberon_is_set_type(dst
-> result
))
3917 oberon_error(ctx
, "expect integer");
3921 x
= list_args
-> next
;
3922 oberon_check_src(ctx
, x
);
3924 if(!oberon_is_integer_type(x
-> result
))
3926 oberon_error(ctx
, "expect integer");
3929 oberon_expr_t
* expr
;
3930 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
3931 oberon_assign(ctx
, expr
, dst
);
3935 oberon_make_excl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3939 oberon_error(ctx
, "too few arguments");
3944 oberon_error(ctx
, "too mach arguments");
3947 oberon_expr_t
* dst
;
3949 oberon_check_dst(ctx
, dst
);
3951 if(!oberon_is_set_type(dst
-> result
))
3953 oberon_error(ctx
, "expect integer");
3957 x
= list_args
-> next
;
3958 oberon_check_src(ctx
, x
);
3960 if(!oberon_is_integer_type(x
-> result
))
3962 oberon_error(ctx
, "expect integer");
3965 oberon_expr_t
* expr
;
3966 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
3967 oberon_assign(ctx
, expr
, dst
);
3971 oberon_make_dec_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3975 oberon_error(ctx
, "too few arguments");
3980 oberon_error(ctx
, "too mach arguments");
3983 oberon_expr_t
* dst
;
3985 oberon_check_dst(ctx
, dst
);
3987 if(!oberon_is_integer_type(dst
-> result
))
3989 oberon_error(ctx
, "expect integer");
3992 oberon_expr_t
* expr
;
3993 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_make_integer(ctx
, 1));
3994 oberon_assign(ctx
, expr
, dst
);
3998 oberon_make_new_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4002 oberon_error(ctx
, "too few arguments");
4005 oberon_expr_t
* dst
;
4007 oberon_check_dst(ctx
, dst
);
4009 oberon_type_t
* type
;
4010 type
= dst
-> result
;
4012 if(type
-> class != OBERON_TYPE_POINTER
)
4014 oberon_error(ctx
, "not a pointer");
4017 type
= type
-> base
;
4019 oberon_expr_t
* src
;
4020 src
= oberon_new_item(MODE_NEW
, dst
-> result
, 0);
4021 src
-> item
.num_args
= 0;
4022 src
-> item
.args
= NULL
;
4025 if(type
-> class == OBERON_TYPE_ARRAY
)
4027 if(type
-> size
== 0)
4029 oberon_type_t
* x
= type
;
4030 while(x
-> class == OBERON_TYPE_ARRAY
)
4040 if(num_args
< max_args
)
4042 oberon_error(ctx
, "too few arguments");
4045 if(num_args
> max_args
)
4047 oberon_error(ctx
, "too mach arguments");
4050 int num_sizes
= max_args
- 1;
4051 oberon_expr_t
* size_list
= list_args
-> next
;
4053 oberon_expr_t
* arg
= size_list
;
4054 for(int i
= 0; i
< max_args
- 1; i
++)
4056 oberon_check_src(ctx
, arg
);
4057 if(arg
-> result
-> class != OBERON_TYPE_INTEGER
)
4059 oberon_error(ctx
, "size must be integer");
4064 src
-> item
.num_args
= num_sizes
;
4065 src
-> item
.args
= size_list
;
4067 else if(type
-> class != OBERON_TYPE_RECORD
)
4069 oberon_error(ctx
, "oberon_make_new_call: wat");
4072 if(num_args
> max_args
)
4074 oberon_error(ctx
, "too mach arguments");
4077 oberon_assign(ctx
, src
, dst
);
4081 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4085 oberon_error(ctx
, "too few arguments");
4090 oberon_error(ctx
, "too mach arguments");
4093 oberon_expr_t
* src
;
4095 oberon_check_src(ctx
, src
);
4097 oberon_expr_t
* dst
;
4098 dst
= list_args
-> next
;
4099 oberon_check_dst(ctx
, dst
);
4101 if(!oberon_is_string_type(src
-> result
) && !oberon_is_array_of_char_type(src
-> result
))
4103 oberon_error(ctx
, "source must be string or array of char");
4106 if(!oberon_is_array_of_char_type(dst
-> result
))
4108 oberon_error(ctx
, "dst must be array of char");
4111 oberon_generate_copy(ctx
, src
, dst
);
4115 oberon_make_assert_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4119 oberon_error(ctx
, "too few arguments");
4124 oberon_error(ctx
, "too mach arguments");
4127 oberon_expr_t
* cond
;
4129 oberon_check_src(ctx
, cond
);
4131 if(!oberon_is_boolean_type(cond
-> result
))
4133 oberon_error(ctx
, "expected boolean");
4138 oberon_generate_assert(ctx
, cond
);
4142 oberon_expr_t
* num
;
4143 num
= list_args
-> next
;
4144 oberon_check_src(ctx
, num
);
4146 if(!oberon_is_integer_type(num
-> result
))
4148 oberon_error(ctx
, "expected integer");
4151 oberon_check_const(ctx
, num
);
4153 oberon_generate_assert_n(ctx
, cond
, num
-> item
.integer
);
4158 oberon_make_halt_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4162 oberon_error(ctx
, "too few arguments");
4167 oberon_error(ctx
, "too mach arguments");
4170 oberon_expr_t
* num
;
4172 oberon_check_src(ctx
, num
);
4174 if(num
-> result
-> class != OBERON_TYPE_INTEGER
)
4176 oberon_error(ctx
, "expected integer");
4179 oberon_check_const(ctx
, num
);
4181 oberon_generate_halt(ctx
, num
-> item
.integer
);
4184 static oberon_expr_t
*
4185 oberon_make_ash_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4189 oberon_error(ctx
, "too few arguments");
4194 oberon_error(ctx
, "too mach arguments");
4197 oberon_expr_t
* arg1
;
4199 oberon_check_src(ctx
, arg1
);
4200 if(arg1
-> result
-> class != OBERON_TYPE_INTEGER
)
4202 oberon_error(ctx
, "expected integer");
4205 oberon_expr_t
* arg2
;
4206 arg2
= list_args
-> next
;
4207 oberon_check_src(ctx
, arg2
);
4208 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4210 oberon_error(ctx
, "expected integer");
4213 oberon_expr_t
* expr
;
4214 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4216 int64_t x
= arg1
-> item
.integer
;
4217 int64_t y
= arg2
-> item
.integer
;
4218 int64_t v
= (y
> 0) ? (x
<< y
) : (x
>> labs(y
));
4219 expr
= oberon_make_integer(ctx
, v
);
4223 expr
= oberon_new_operator(OP_ASH
, arg1
-> result
, arg1
, arg2
);
4229 static oberon_expr_t
*
4230 oberon_make_lsh_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4234 oberon_error(ctx
, "too few arguments");
4239 oberon_error(ctx
, "too mach arguments");
4242 oberon_expr_t
* arg1
;
4244 oberon_check_src(ctx
, arg1
);
4246 oberon_type_t
* t
= arg1
-> result
;
4247 if(!oberon_is_integer_type(t
)
4248 && !oberon_is_char_type(t
)
4249 && !oberon_is_system_byte_type(t
))
4251 oberon_error(ctx
, "expected integer, char, or SYSTEM.BYTE");
4254 oberon_expr_t
* arg2
;
4255 arg2
= list_args
-> next
;
4256 oberon_check_src(ctx
, arg2
);
4257 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4259 oberon_error(ctx
, "expected integer");
4262 oberon_expr_t
* expr
;
4263 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4265 uint64_t x
= arg1
-> item
.integer
;
4266 int64_t y
= arg2
-> item
.integer
;
4267 uint64_t v
= (y
> 0) ? (x
<< y
) : (x
>> labs(y
));
4269 if(oberon_is_integer_type(t
))
4271 expr
= oberon_make_integer(ctx
, v
);
4273 else if(oberon_is_char_type(t
))
4275 expr
= oberon_make_char(ctx
, v
);
4279 expr
= oberon_make_system_byte(ctx
, v
);
4284 expr
= oberon_new_operator(OP_LSH
, arg1
-> result
, arg1
, arg2
);
4285 expr
= oberon_cast_expr(ctx
, expr
, t
);
4291 static oberon_expr_t
*
4292 oberon_make_rot_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4296 oberon_error(ctx
, "too few arguments");
4301 oberon_error(ctx
, "too mach arguments");
4304 oberon_expr_t
* arg1
;
4306 oberon_check_src(ctx
, arg1
);
4308 oberon_type_t
* t
= arg1
-> result
;
4309 if(!oberon_is_integer_type(t
)
4310 && !oberon_is_char_type(t
)
4311 && !oberon_is_system_byte_type(t
))
4313 oberon_error(ctx
, "expected integer, char, or SYSTEM.BYTE");
4316 oberon_expr_t
* arg2
;
4317 arg2
= list_args
-> next
;
4318 oberon_check_src(ctx
, arg2
);
4319 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4321 oberon_error(ctx
, "expected integer");
4324 oberon_expr_t
* expr
;
4325 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4327 uint64_t x
= arg1
-> item
.integer
;
4328 int64_t y
= arg2
-> item
.integer
;
4333 v
= (x
<< y
) | (x
>> (64 - y
));
4338 v
= (x
>> y
) | (x
<< (64 - y
));
4341 if(oberon_is_integer_type(t
))
4343 expr
= oberon_make_integer(ctx
, v
);
4345 else if(oberon_is_char_type(t
))
4347 expr
= oberon_make_char(ctx
, v
);
4351 expr
= oberon_make_system_byte(ctx
, v
);
4356 expr
= oberon_new_operator(OP_ROT
, arg1
-> result
, arg1
, arg2
);
4357 expr
= oberon_cast_expr(ctx
, expr
, t
);
4363 static oberon_expr_t
*
4364 oberon_make_cap_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4368 oberon_error(ctx
, "too few arguments");
4373 oberon_error(ctx
, "too mach arguments");
4376 oberon_expr_t
* arg
;
4378 oberon_check_src(ctx
, arg
);
4380 if(!oberon_is_char_type(arg
-> result
))
4382 oberon_error(ctx
, "expected char");
4385 oberon_expr_t
* expr
;
4386 if(oberon_is_const(arg
))
4388 expr
= oberon_make_char(ctx
, toupper(arg
-> item
.integer
));
4392 expr
= oberon_new_operator(OP_CAP
, arg
-> result
, arg
, NULL
);
4398 static oberon_expr_t
*
4399 oberon_make_chr_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4403 oberon_error(ctx
, "too few arguments");
4408 oberon_error(ctx
, "too mach arguments");
4411 oberon_expr_t
* arg
;
4413 oberon_check_src(ctx
, arg
);
4415 if(!oberon_is_integer_type(arg
-> result
))
4417 oberon_error(ctx
, "expected integer");
4420 oberon_expr_t
* expr
;
4421 if(oberon_is_const(arg
))
4423 expr
= oberon_make_char(ctx
, arg
-> item
.integer
);
4427 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> char_type
);
4432 static oberon_expr_t
*
4433 oberon_make_ord_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4437 oberon_error(ctx
, "too few arguments");
4442 oberon_error(ctx
, "too mach arguments");
4445 oberon_expr_t
* arg
;
4447 oberon_check_src(ctx
, arg
);
4449 if(!oberon_is_char_type(arg
-> result
) && !oberon_is_string_of_one(arg
))
4451 oberon_error(ctx
, "expected char");
4454 oberon_expr_t
* expr
;
4455 if(oberon_is_const(arg
))
4457 expr
= oberon_make_integer(ctx
, arg
-> item
.integer
);
4461 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> int_type
);
4466 static oberon_expr_t
*
4467 oberon_make_entier_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4471 oberon_error(ctx
, "too few arguments");
4476 oberon_error(ctx
, "too mach arguments");
4479 oberon_expr_t
* arg
;
4481 oberon_check_src(ctx
, arg
);
4483 if(!oberon_is_real_type(arg
-> result
))
4485 oberon_error(ctx
, "expected real");
4488 oberon_expr_t
* expr
;
4489 if(oberon_is_const(arg
))
4491 expr
= oberon_make_integer(ctx
, floor(arg
-> item
.real
));
4495 expr
= oberon_new_operator(OP_ENTIER
, ctx
-> int_type
, arg
, NULL
);
4500 static oberon_expr_t
*
4501 oberon_make_odd_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4505 oberon_error(ctx
, "too few arguments");
4510 oberon_error(ctx
, "too mach arguments");
4513 oberon_expr_t
* arg
;
4515 oberon_check_src(ctx
, arg
);
4517 if(!oberon_is_integer_type(arg
-> result
))
4519 oberon_error(ctx
, "expected integer");
4522 oberon_expr_t
* expr
;
4523 expr
= oberon_make_bin_op(ctx
, MOD
, arg
, oberon_make_integer(ctx
, 2));
4524 expr
= oberon_make_bin_op(ctx
, EQUAL
, expr
, oberon_make_integer(ctx
, 1));
4528 static oberon_expr_t
*
4529 oberon_make_cc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4533 oberon_error(ctx
, "too few arguments");
4538 oberon_error(ctx
, "too mach arguments");
4541 oberon_expr_t
* arg
;
4543 oberon_check_src(ctx
, arg
);
4544 oberon_check_const(ctx
, arg
);
4546 if(!oberon_is_integer_type(arg
-> result
))
4548 oberon_error(ctx
, "expected integer");
4551 /* n >= 0 && n <= 15 */
4553 oberon_expr_t
* cond1
;
4554 oberon_expr_t
* cond2
;
4555 cond1
= oberon_make_bin_op(ctx
, GEQ
, arg
, oberon_make_integer(ctx
, 0));
4556 cond2
= oberon_make_bin_op(ctx
, LEQ
, arg
, oberon_make_integer(ctx
, 15));
4557 return oberon_make_bin_op(ctx
, AND
, cond1
, cond2
);
4560 static oberon_expr_t
*
4561 oberon_make_short_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4565 oberon_error(ctx
, "too few arguments");
4570 oberon_error(ctx
, "too mach arguments");
4573 oberon_expr_t
* arg
;
4575 oberon_check_src(ctx
, arg
);
4577 if(arg
-> result
-> shorter
== NULL
)
4579 oberon_error(ctx
, "already shorter");
4582 oberon_expr_t
* expr
;
4583 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> shorter
);
4587 static oberon_expr_t
*
4588 oberon_make_long_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4592 oberon_error(ctx
, "too few arguments");
4597 oberon_error(ctx
, "too mach arguments");
4600 oberon_expr_t
* arg
;
4602 oberon_check_src(ctx
, arg
);
4604 if(arg
-> result
-> longer
== NULL
)
4606 oberon_error(ctx
, "already longer");
4609 oberon_expr_t
* expr
;
4610 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> longer
);
4614 static oberon_expr_t
*
4615 oberon_make_val_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4619 oberon_error(ctx
, "too few arguments");
4624 oberon_error(ctx
, "too mach arguments");
4627 oberon_expr_t
* typ
;
4629 if(!oberon_is_type_expr(typ
))
4631 oberon_error(ctx
, "requires type");
4634 oberon_expr_t
* arg
;
4635 arg
= list_args
-> next
;
4636 oberon_check_src(ctx
, arg
);
4638 oberon_expr_t
* expr
;
4639 expr
= oberon_hard_cast_expr(ctx
, arg
, typ
-> result
);
4643 static oberon_expr_t
*
4644 oberon_make_len_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4648 oberon_error(ctx
, "too few arguments");
4653 oberon_error(ctx
, "too mach arguments");
4658 oberon_check_src(ctx
, v
);
4660 if(!oberon_is_array_type(v
-> result
))
4662 oberon_error(ctx
, "expected array");
4668 oberon_expr_t
* num
;
4669 num
= list_args
-> next
;
4670 oberon_check_src(ctx
, num
);
4672 if(!oberon_is_integer_type(num
-> result
))
4674 oberon_error(ctx
, "expected integer");
4676 oberon_check_const(ctx
, num
);
4678 n
= num
-> item
.integer
;
4682 oberon_type_t
* arr
= v
-> result
;
4683 while(arr
-> class == OBERON_TYPE_ARRAY
)
4689 if(n
< 0 || n
> dim
)
4691 oberon_error(ctx
, "not in range 0..%i", dim
- 1);
4694 assert(v
-> is_item
);
4696 oberon_expr_t
* expr
;
4697 expr
= oberon_new_item(MODE_LEN
, ctx
-> int_type
, true);
4698 expr
-> item
.parent
= (oberon_item_t
*) v
;
4699 expr
-> item
.integer
= n
;
4704 oberon_new_const(oberon_context_t
* ctx
, char * name
, oberon_expr_t
* expr
)
4706 oberon_object_t
* constant
;
4707 constant
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_CONST
, true, false, false);
4708 oberon_check_const(ctx
, expr
);
4709 constant
-> value
= (oberon_item_t
*) expr
;
4713 register_default_types(oberon_context_t
* ctx
)
4715 ctx
-> notype_type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
4716 oberon_generator_init_type(ctx
, ctx
-> notype_type
);
4718 ctx
-> nil_type
= oberon_new_type_ptr(OBERON_TYPE_NIL
);
4719 oberon_generator_init_type(ctx
, ctx
-> nil_type
);
4721 ctx
-> string_type
= oberon_new_type_string(1);
4722 oberon_generator_init_type(ctx
, ctx
-> string_type
);
4724 ctx
-> bool_type
= oberon_new_type_boolean();
4725 oberon_generator_init_type(ctx
, ctx
-> bool_type
);
4727 ctx
-> char_type
= oberon_new_type_char(1);
4728 oberon_generator_init_type(ctx
, ctx
-> char_type
);
4730 ctx
-> byte_type
= oberon_new_type_integer(1);
4731 oberon_generator_init_type(ctx
, ctx
-> byte_type
);
4733 ctx
-> shortint_type
= oberon_new_type_integer(2);
4734 oberon_generator_init_type(ctx
, ctx
-> shortint_type
);
4736 ctx
-> int_type
= oberon_new_type_integer(4);
4737 oberon_generator_init_type(ctx
, ctx
-> int_type
);
4739 ctx
-> longint_type
= oberon_new_type_integer(8);
4740 oberon_generator_init_type(ctx
, ctx
-> longint_type
);
4742 ctx
-> real_type
= oberon_new_type_real(4);
4743 oberon_generator_init_type(ctx
, ctx
-> real_type
);
4745 ctx
-> longreal_type
= oberon_new_type_real(8);
4746 oberon_generator_init_type(ctx
, ctx
-> longreal_type
);
4748 ctx
-> set_type
= oberon_new_type_set(4);
4749 oberon_generator_init_type(ctx
, ctx
-> set_type
);
4751 ctx
-> system_byte_type
= oberon_new_type_ptr(OBERON_TYPE_SYSTEM_BYTE
);
4752 oberon_generator_init_type(ctx
, ctx
-> system_byte_type
);
4754 ctx
-> system_ptr_type
= oberon_new_type_ptr(OBERON_TYPE_SYSTEM_PTR
);
4755 oberon_generator_init_type(ctx
, ctx
-> system_ptr_type
);
4757 /* LONG / SHORT support */
4758 ctx
-> byte_type
-> shorter
= NULL
;
4759 ctx
-> byte_type
-> longer
= ctx
-> shortint_type
;
4761 ctx
-> shortint_type
-> shorter
= ctx
-> byte_type
;
4762 ctx
-> shortint_type
-> longer
= ctx
-> int_type
;
4764 ctx
-> int_type
-> shorter
= ctx
-> shortint_type
;
4765 ctx
-> int_type
-> longer
= ctx
-> longint_type
;
4767 ctx
-> longint_type
-> shorter
= ctx
-> int_type
;
4768 ctx
-> longint_type
-> longer
= NULL
;
4770 ctx
-> real_type
-> shorter
= NULL
;
4771 ctx
-> real_type
-> longer
= ctx
-> longreal_type
;
4773 ctx
-> longreal_type
-> shorter
= ctx
-> real_type
;
4774 ctx
-> longreal_type
-> longer
= NULL
;
4778 oberon_new_intrinsic(oberon_context_t
* ctx
, char * name
, GenerateFuncCallback f
, GenerateProcCallback p
)
4780 oberon_object_t
* proc
;
4781 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, true, false, false);
4782 proc
-> type
= oberon_new_type_ptr(OBERON_TYPE_PROCEDURE
);
4783 proc
-> type
-> sysproc
= true;
4784 proc
-> type
-> genfunc
= f
;
4785 proc
-> type
-> genproc
= p
;
4788 static void oberon_new_intrinsic_type(oberon_context_t
* ctx
, char * name
, oberon_type_t
* type
)
4790 oberon_object_t
* id
;
4791 id
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, true, false, false);
4796 oberon_begin_intrinsic_module(oberon_context_t
* ctx
, char * name
, oberon_module_t
** m
)
4798 oberon_scope_t
* module_scope
;
4799 module_scope
= oberon_open_scope(ctx
);
4801 oberon_module_t
* module
;
4802 module
= GC_MALLOC(sizeof *module
);
4803 memset(module
, 0, sizeof *module
);
4804 module
-> name
= name
;
4805 module
-> intrinsic
= true;
4806 module
-> decl
= module_scope
;
4807 module
-> next
= ctx
-> module_list
;
4809 ctx
-> mod
= module
;
4810 ctx
-> module_list
= module
;
4816 oberon_end_intrinsic_module(oberon_context_t
* ctx
, oberon_module_t
* m
)
4818 oberon_close_scope(m
-> decl
);
4824 oberon_create_context(ModuleImportCallback import_module
)
4826 oberon_context_t
* ctx
= GC_MALLOC(sizeof *ctx
);
4827 memset(ctx
, 0, sizeof *ctx
);
4829 oberon_scope_t
* world_scope
;
4830 world_scope
= oberon_open_scope(ctx
);
4831 ctx
-> world_scope
= world_scope
;
4833 ctx
-> import_module
= import_module
;
4835 oberon_generator_init_context(ctx
);
4838 register_default_types(ctx
);
4841 oberon_new_const(ctx
, "TRUE", oberon_make_boolean(ctx
, true));
4842 oberon_new_const(ctx
, "FALSE", oberon_make_boolean(ctx
, false));
4845 oberon_new_intrinsic_type(ctx
, "BOOLEAN", ctx
-> bool_type
);
4846 oberon_new_intrinsic_type(ctx
, "CHAR", ctx
-> char_type
);
4847 oberon_new_intrinsic_type(ctx
, "SHORTINT", ctx
-> byte_type
);
4848 oberon_new_intrinsic_type(ctx
, "INTEGER", ctx
-> shortint_type
);
4849 oberon_new_intrinsic_type(ctx
, "LONGINT", ctx
-> int_type
);
4850 oberon_new_intrinsic_type(ctx
, "HUGEINT", ctx
-> longint_type
);
4851 oberon_new_intrinsic_type(ctx
, "REAL", ctx
-> real_type
);
4852 oberon_new_intrinsic_type(ctx
, "LONGREAL", ctx
-> longreal_type
);
4853 oberon_new_intrinsic_type(ctx
, "SET", ctx
-> set_type
);
4856 oberon_new_intrinsic(ctx
, "ABS", oberon_make_abs_call
, NULL
);
4857 oberon_new_intrinsic(ctx
, "ASH", oberon_make_ash_call
, NULL
);
4858 oberon_new_intrinsic(ctx
, "CAP", oberon_make_cap_call
, NULL
);
4859 oberon_new_intrinsic(ctx
, "CHR", oberon_make_chr_call
, NULL
);
4860 oberon_new_intrinsic(ctx
, "ENTIER", oberon_make_entier_call
, NULL
);
4861 oberon_new_intrinsic(ctx
, "LEN", oberon_make_len_call
, NULL
);
4862 oberon_new_intrinsic(ctx
, "LONG", oberon_make_long_call
, NULL
);
4863 oberon_new_intrinsic(ctx
, "MAX", oberon_make_max_call
, NULL
);
4864 oberon_new_intrinsic(ctx
, "MIN", oberon_make_min_call
, NULL
);
4865 oberon_new_intrinsic(ctx
, "ODD", oberon_make_odd_call
, NULL
);
4866 oberon_new_intrinsic(ctx
, "ORD", oberon_make_ord_call
, NULL
);
4867 oberon_new_intrinsic(ctx
, "SHORT", oberon_make_short_call
, NULL
);
4868 oberon_new_intrinsic(ctx
, "SIZE", oberon_make_size_call
, NULL
);
4871 oberon_new_intrinsic(ctx
, "ASSERT", NULL
, oberon_make_assert_call
);
4872 oberon_new_intrinsic(ctx
, "COPY", NULL
, oberon_make_copy_call
);
4873 oberon_new_intrinsic(ctx
, "DEC", NULL
, oberon_make_dec_call
);
4874 oberon_new_intrinsic(ctx
, "EXCL", NULL
, oberon_make_excl_call
);
4875 oberon_new_intrinsic(ctx
, "HALT", NULL
, oberon_make_halt_call
);
4876 oberon_new_intrinsic(ctx
, "INC", NULL
, oberon_make_inc_call
);
4877 oberon_new_intrinsic(ctx
, "INCL", NULL
, oberon_make_incl_call
);
4878 oberon_new_intrinsic(ctx
, "NEW", NULL
, oberon_make_new_call
);
4881 oberon_begin_intrinsic_module(ctx
, "SYSTEM", &ctx
-> system_module
);
4884 oberon_new_intrinsic_type(ctx
, "BYTE", ctx
-> system_byte_type
);
4885 oberon_new_intrinsic_type(ctx
, "PTR", ctx
-> system_ptr_type
);
4888 oberon_new_intrinsic(ctx
, "CC", oberon_make_cc_call
, NULL
);
4889 oberon_new_intrinsic(ctx
, "LSH", oberon_make_lsh_call
, NULL
);
4890 oberon_new_intrinsic(ctx
, "ROT", oberon_make_rot_call
, NULL
);
4891 oberon_new_intrinsic(ctx
, "VAL", oberon_make_val_call
, NULL
);
4893 oberon_end_intrinsic_module(ctx
, ctx
-> system_module
);
4899 oberon_destroy_context(oberon_context_t
* ctx
)
4901 oberon_generator_destroy_context(ctx
);
4905 oberon_compile_module(oberon_context_t
* ctx
, oberon_scanner_t
* s
)
4907 const char * code
= ctx
-> code
;
4908 int code_index
= ctx
-> code_index
;
4909 oberon_location_t loc
= ctx
-> loc
;
4910 oberon_location_t xloc
= ctx
-> xloc
;
4912 int token
= ctx
-> token
;
4913 char * string
= ctx
-> string
;
4914 int integer
= ctx
-> integer
;
4915 int real
= ctx
-> real
;
4916 bool longmode
= ctx
-> longmode
;
4917 oberon_scope_t
* decl
= ctx
-> decl
;
4918 oberon_module_t
* mod
= ctx
-> mod
;
4920 oberon_scope_t
* module_scope
;
4921 module_scope
= oberon_open_scope(ctx
);
4923 oberon_module_t
* module
;
4924 module
= GC_MALLOC(sizeof *module
);
4925 memset(module
, 0, sizeof *module
);
4926 module
-> decl
= module_scope
;
4927 module
-> next
= ctx
-> module_list
;
4929 ctx
-> mod
= module
;
4930 ctx
-> module_list
= module
;
4932 oberon_init_scaner(ctx
, s
);
4933 oberon_parse_module(ctx
);
4935 module
-> ready
= 1;
4938 ctx
-> code_index
= code_index
;
4942 ctx
-> token
= token
;
4943 ctx
-> string
= string
;
4944 ctx
-> integer
= integer
;
4946 ctx
-> longmode
= longmode
;