ebcaa990f9640d227f34c139844e63b26e5defee
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 printf("oberon_autocast_call: num_args %i num_decl %i\n", num_args
, num_decl
);
1155 if(num_args
< num_decl
)
1157 oberon_error(ctx
, "too few arguments");
1159 else if(num_args
> num_decl
)
1161 oberon_error(ctx
, "too many arguments");
1164 /* Делаем проверку на запись и делаем автокаст */
1165 oberon_expr_t
* casted
[num_args
];
1166 oberon_expr_t
* arg
= desig
-> args
;
1167 oberon_object_t
* param
= fn
-> decl
;
1168 for(int i
= 0; i
< num_args
; i
++)
1170 if(param
-> class == OBERON_CLASS_VAR_PARAM
)
1172 oberon_check_dst(ctx
, arg
);
1173 if(!oberon_is_compatible_arrays(param
, arg
))
1175 oberon_check_compatible_var_param(ctx
, param
-> type
, arg
-> result
);
1178 //casted[i] = oberon_cast_expr(ctx, arg, param -> type);
1182 oberon_check_src(ctx
, arg
);
1183 if(!oberon_is_compatible_arrays(param
, arg
))
1185 oberon_check_assignment_compatible(ctx
, arg
, param
-> type
);
1187 casted
[i
] = oberon_cast_expr(ctx
, arg
, param
-> type
);
1191 param
= param
-> next
;
1194 /* Создаём новый список выражений */
1198 for(int i
= 0; i
< num_args
- 1; i
++)
1200 casted
[i
] -> next
= casted
[i
+ 1];
1202 desig
-> args
= arg
;
1206 static oberon_expr_t
*
1207 oberon_make_call_func(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1209 oberon_type_t
* signature
= item
-> result
;
1210 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1212 oberon_error(ctx
, "not a procedure");
1215 oberon_expr_t
* call
;
1217 if(signature
-> sysproc
)
1219 if(signature
-> genfunc
== NULL
)
1221 oberon_error(ctx
, "not a function-procedure");
1224 call
= signature
-> genfunc(ctx
, num_args
, list_args
);
1228 if(signature
-> base
-> class == OBERON_TYPE_NOTYPE
)
1230 oberon_error(ctx
, "attempt to call procedure in expression");
1233 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1234 call
-> item
.parent
= item
;
1235 call
-> item
.num_args
= num_args
;
1236 call
-> item
.args
= list_args
;
1237 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1244 oberon_make_call_proc(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1246 oberon_type_t
* signature
= item
-> result
;
1247 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1249 oberon_error(ctx
, "not a procedure");
1252 oberon_expr_t
* call
;
1254 if(signature
-> sysproc
)
1256 if(signature
-> genproc
== NULL
)
1258 oberon_error(ctx
, "not a procedure");
1261 signature
-> genproc(ctx
, num_args
, list_args
);
1265 if(signature
-> base
-> class != OBERON_TYPE_NOTYPE
)
1267 oberon_error(ctx
, "attempt to call function as non-typed procedure");
1270 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1271 call
-> item
.parent
= item
;
1272 call
-> item
.num_args
= num_args
;
1273 call
-> item
.args
= list_args
;
1274 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1275 oberon_generate_call_proc(ctx
, call
);
1283 || ((x) == INTEGER) \
1286 || ((x) == STRING) \
1288 || ((x) == LBRACE) \
1289 || ((x) == LPAREN) \
1292 static oberon_expr_t
*
1293 oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1295 if(expr
-> result
-> class != OBERON_TYPE_POINTER
)
1297 oberon_error(ctx
, "not a pointer");
1300 assert(expr
-> is_item
);
1302 oberon_expr_t
* selector
;
1303 selector
= oberon_new_item(MODE_DEREF
, expr
-> result
-> base
, false);
1304 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1309 static oberon_expr_t
*
1310 oberon_make_array_selector(oberon_context_t
* ctx
, oberon_expr_t
* desig
, oberon_expr_t
* index
)
1312 if(desig
-> result
-> class == OBERON_TYPE_POINTER
)
1314 desig
= oberno_make_dereferencing(ctx
, desig
);
1317 assert(desig
-> is_item
);
1319 if(desig
-> result
-> class != OBERON_TYPE_ARRAY
)
1321 oberon_error(ctx
, "not array");
1324 oberon_type_t
* base
;
1325 base
= desig
-> result
-> base
;
1327 if(index
-> result
-> class != OBERON_TYPE_INTEGER
)
1329 oberon_error(ctx
, "index must be integer");
1332 // Статическая проверка границ массива
1333 if(desig
-> result
-> size
!= 0)
1335 if(index
-> is_item
)
1337 if(index
-> item
.mode
== MODE_INTEGER
)
1339 int arr_size
= desig
-> result
-> size
;
1340 int index_int
= index
-> item
.integer
;
1341 if(index_int
< 0 || index_int
> arr_size
- 1)
1343 oberon_error(ctx
, "not in range (dimension size 0..%i)", arr_size
- 1);
1349 oberon_expr_t
* selector
;
1350 selector
= oberon_new_item(MODE_INDEX
, base
, desig
-> read_only
);
1351 selector
-> item
.parent
= (oberon_item_t
*) desig
;
1352 selector
-> item
.num_args
= 1;
1353 selector
-> item
.args
= index
;
1358 static oberon_expr_t
*
1359 oberon_make_record_selector(oberon_context_t
* ctx
, oberon_expr_t
* expr
, char * name
)
1361 if(expr
-> result
-> class == OBERON_TYPE_POINTER
)
1363 expr
= oberno_make_dereferencing(ctx
, expr
);
1366 assert(expr
-> is_item
);
1368 if(expr
-> result
-> class != OBERON_TYPE_RECORD
)
1370 oberon_error(ctx
, "not record");
1373 oberon_type_t
* rec
= expr
-> result
;
1375 oberon_object_t
* field
;
1376 field
= oberon_find_object(rec
-> scope
, name
, true);
1378 if(field
-> export
== 0)
1380 if(field
-> module
!= ctx
-> mod
)
1382 oberon_error(ctx
, "field not exported");
1386 int read_only
= expr
-> read_only
;
1387 if(field
-> read_only
)
1389 if(field
-> module
!= ctx
-> mod
)
1395 oberon_expr_t
* selector
;
1396 selector
= oberon_new_item(MODE_FIELD
, field
-> type
, read_only
);
1397 selector
-> item
.var
= field
;
1398 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1403 #define ISSELECTOR(x) \
1406 || ((x) == UPARROW) \
1409 static oberon_object_t
*
1410 oberon_qualident(oberon_context_t
* ctx
, char ** xname
, int check
)
1413 oberon_object_t
* x
;
1415 name
= oberon_assert_ident(ctx
);
1416 x
= oberon_find_object(ctx
-> decl
, name
, check
);
1420 if(x
-> class == OBERON_CLASS_MODULE
)
1422 oberon_assert_token(ctx
, DOT
);
1423 name
= oberon_assert_ident(ctx
);
1424 /* Наличие объектов в левых модулях всегда проверяется */
1425 x
= oberon_find_object(x
-> module
-> decl
, name
, 1);
1427 if(x
-> export
== 0)
1429 oberon_error(ctx
, "not exported");
1442 static oberon_expr_t
*
1443 oberon_ident_item(oberon_context_t
* ctx
, char * name
)
1446 oberon_object_t
* x
;
1447 oberon_expr_t
* expr
;
1449 x
= oberon_find_object(ctx
-> decl
, name
, true);
1452 if(x
-> class == OBERON_CLASS_CONST
|| x
-> class == OBERON_CLASS_PROC
)
1457 expr
= oberon_new_item(MODE_VAR
, x
-> type
, read_only
);
1458 expr
-> item
.var
= x
;
1462 static oberon_expr_t
*
1463 oberon_qualident_expr(oberon_context_t
* ctx
)
1465 oberon_object_t
* var
;
1466 oberon_expr_t
* expr
;
1468 var
= oberon_qualident(ctx
, NULL
, 1);
1471 if(var
-> read_only
)
1473 if(var
-> module
!= ctx
-> mod
)
1479 switch(var
-> class)
1481 case OBERON_CLASS_CONST
:
1483 expr
= (oberon_expr_t
*) var
-> value
;
1485 case OBERON_CLASS_TYPE
:
1486 expr
= oberon_new_item(MODE_TYPE
, var
-> type
, read_only
);
1488 case OBERON_CLASS_VAR
:
1489 case OBERON_CLASS_VAR_PARAM
:
1490 case OBERON_CLASS_PARAM
:
1491 expr
= oberon_new_item(MODE_VAR
, var
-> type
, read_only
);
1493 case OBERON_CLASS_PROC
:
1494 expr
= oberon_new_item(MODE_VAR
, var
-> type
, true);
1497 oberon_error(ctx
, "invalid designator");
1501 expr
-> item
.var
= var
;
1506 static oberon_expr_t
*
1507 oberon_designator(oberon_context_t
* ctx
)
1510 oberon_expr_t
* expr
;
1511 oberon_object_t
* objtype
;
1513 expr
= oberon_qualident_expr(ctx
);
1515 while(expr
-> result
-> class != OBERON_TYPE_PROCEDURE
&& ISSELECTOR(ctx
-> token
))
1517 switch(ctx
-> token
)
1520 oberon_assert_token(ctx
, DOT
);
1521 name
= oberon_assert_ident(ctx
);
1522 expr
= oberon_make_record_selector(ctx
, expr
, name
);
1525 oberon_assert_token(ctx
, LBRACK
);
1526 int num_indexes
= 0;
1527 oberon_expr_t
* indexes
= NULL
;
1528 oberon_expr_list(ctx
, &num_indexes
, &indexes
, 0);
1529 oberon_assert_token(ctx
, RBRACK
);
1531 for(int i
= 0; i
< num_indexes
; i
++)
1533 expr
= oberon_make_array_selector(ctx
, expr
, indexes
);
1534 indexes
= indexes
-> next
;
1538 oberon_assert_token(ctx
, UPARROW
);
1539 expr
= oberno_make_dereferencing(ctx
, expr
);
1542 oberon_assert_token(ctx
, LPAREN
);
1543 objtype
= oberon_qualident(ctx
, NULL
, true);
1544 oberon_assert_token(ctx
, RPAREN
);
1545 oberon_check_extension_of(ctx
, expr
-> result
, objtype
-> type
);
1546 expr
= oberon_cast_expr(ctx
, expr
, objtype
-> type
);
1549 oberon_error(ctx
, "oberon_designator: wat");
1557 static oberon_expr_t
*
1558 oberon_opt_func_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1560 /* Если есть скобки - значит вызов. Если нет, то передаём указатель. */
1561 if(ctx
-> token
== LPAREN
)
1563 oberon_assert_token(ctx
, LPAREN
);
1566 oberon_expr_t
* arguments
= NULL
;
1568 if(ISEXPR(ctx
-> token
))
1570 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1573 assert(expr
-> is_item
== 1);
1574 expr
= oberon_make_call_func(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1576 oberon_assert_token(ctx
, RPAREN
);
1583 oberon_opt_proc_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1585 assert(expr
-> is_item
);
1588 oberon_expr_t
* arguments
= NULL
;
1590 if(ctx
-> token
== LPAREN
)
1592 oberon_assert_token(ctx
, LPAREN
);
1594 if(ISEXPR(ctx
-> token
))
1596 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1599 oberon_assert_token(ctx
, RPAREN
);
1602 /* Вызов происходит даже без скобок */
1603 oberon_make_call_proc(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1606 static oberon_expr_t
*
1607 oberon_element(oberon_context_t
* ctx
)
1612 e1
= oberon_expr(ctx
);
1613 oberon_check_src(ctx
, e1
);
1614 if(e1
-> result
-> class != OBERON_TYPE_INTEGER
)
1616 oberon_error(ctx
, "expected integer");
1620 if(ctx
-> token
== DOTDOT
)
1622 oberon_assert_token(ctx
, DOTDOT
);
1623 e2
= oberon_expr(ctx
);
1624 oberon_check_src(ctx
, e2
);
1625 if(e2
-> result
-> class != OBERON_TYPE_INTEGER
)
1627 oberon_error(ctx
, "expected integer");
1631 oberon_expr_t
* set
;
1632 if(e2
== NULL
&& oberon_is_const(e1
))
1634 set
= oberon_make_set_index(ctx
, e1
-> item
.integer
);
1636 else if(e2
!= NULL
&& oberon_is_const(e1
) && oberon_is_const(e2
))
1638 set
= oberon_make_set_range(ctx
, e1
-> item
.integer
, e2
-> item
.integer
);
1642 set
= oberon_new_operator(OP_RANGE
, ctx
-> set_type
, e1
, e2
);
1647 static oberon_expr_t
*
1648 oberon_make_set_union(oberon_context_t
* ctx
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1650 if(oberon_is_const(a
) && oberon_is_const(b
))
1652 return oberon_make_set(ctx
, (a
-> item
.integer
| b
-> item
.integer
));
1656 return oberon_new_operator(OP_UNION
, ctx
-> set_type
, a
, b
);
1660 static oberon_expr_t
*
1661 oberon_set(oberon_context_t
* ctx
)
1663 oberon_expr_t
* set
;
1664 oberon_expr_t
* elements
;
1665 set
= oberon_make_set(ctx
, 0);
1667 oberon_assert_token(ctx
, LBRACE
);
1668 if(ISEXPR(ctx
-> token
))
1670 elements
= oberon_element(ctx
);
1671 set
= oberon_make_set_union(ctx
, set
, elements
);
1672 while(ctx
-> token
== COMMA
)
1674 oberon_assert_token(ctx
, COMMA
);
1675 elements
= oberon_element(ctx
);
1676 set
= oberon_make_set_union(ctx
, set
, elements
);
1679 oberon_assert_token(ctx
, RBRACE
);
1684 static oberon_expr_t
*
1685 oberon_factor(oberon_context_t
* ctx
)
1687 oberon_expr_t
* expr
;
1688 oberon_type_t
* result
;
1690 switch(ctx
-> token
)
1693 expr
= oberon_designator(ctx
);
1694 expr
= oberon_opt_func_parens(ctx
, expr
);
1697 expr
= oberon_make_integer(ctx
, ctx
-> integer
);
1698 oberon_assert_token(ctx
, INTEGER
);
1701 result
= ctx
-> char_type
;
1702 expr
= oberon_new_item(MODE_CHAR
, result
, true);
1703 expr
-> item
.integer
= ctx
-> integer
;
1704 oberon_assert_token(ctx
, CHAR
);
1707 expr
= oberon_make_string(ctx
, ctx
-> string
);
1708 oberon_assert_token(ctx
, STRING
);
1711 expr
= oberon_make_real(ctx
, ctx
-> real
, ctx
-> longmode
);
1712 oberon_assert_token(ctx
, REAL
);
1715 expr
= oberon_set(ctx
);
1718 oberon_assert_token(ctx
, LPAREN
);
1719 expr
= oberon_expr(ctx
);
1720 oberon_assert_token(ctx
, RPAREN
);
1723 oberon_assert_token(ctx
, NOT
);
1724 expr
= oberon_factor(ctx
);
1725 expr
= oberon_make_unary_op(ctx
, NOT
, expr
);
1728 oberon_assert_token(ctx
, NIL
);
1729 expr
= oberon_new_item(MODE_NIL
, ctx
-> nil_type
, true);
1732 oberon_error(ctx
, "invalid expression");
1738 static oberon_expr_t
*
1739 oberon_make_bin_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1741 oberon_expr_t
* expr
;
1742 oberon_type_t
* result
;
1744 oberon_check_compatible_bin_expr(ctx
, token
, a
, b
);
1745 oberon_check_src(ctx
, a
);
1748 oberon_check_src(ctx
, b
);
1753 if(oberon_is_const(a
) && oberon_is_const(b
))
1755 expr
= oberon_make_boolean(ctx
, (1 << a
-> item
.integer
) & b
-> item
.integer
);
1759 expr
= oberon_new_operator(OP_IN
, ctx
-> bool_type
, a
, b
);
1762 else if(token
== IS
)
1764 oberon_check_type_expr(ctx
, b
);
1765 expr
= oberon_new_operator(OP_IS
, ctx
-> bool_type
, a
, b
);
1767 else if((token
>= EQUAL
&& token
<= GEQ
) || token
== OR
|| token
== AND
)
1769 if(oberon_is_string_of_one(a
) && oberon_is_char_type(b
-> result
))
1771 result
= b
-> result
;
1773 else if(oberon_is_string_of_one(b
) && oberon_is_char_type(a
-> result
))
1775 result
= a
-> result
;
1777 else if(oberon_is_string_of_one(a
) && oberon_is_string_of_one(b
))
1779 result
= ctx
-> char_type
;
1783 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1786 if(oberon_is_const(a
) && oberon_is_const(b
)
1787 && (oberon_is_real_type(result
) || oberon_is_integer_type(result
)))
1789 if(oberon_is_real_type(result
))
1791 double x
= a
-> item
.real
;
1792 double y
= b
-> item
.real
;
1795 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1796 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1797 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1798 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1799 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1800 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1801 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1802 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1803 default: assert(0); break;
1806 else if(oberon_is_integer_type(result
))
1808 int64_t x
= a
-> item
.integer
;
1809 int64_t y
= b
-> item
.integer
;
1812 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1813 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1814 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1815 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1816 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1817 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1818 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1819 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1820 default: assert(0); break;
1830 a
= oberon_cast_expr(ctx
, a
, result
);
1831 b
= oberon_cast_expr(ctx
, b
, result
);
1832 result
= ctx
-> bool_type
;
1835 case EQUAL
: expr
= oberon_new_operator(OP_EQ
, result
, a
, b
); break;
1836 case NEQ
: expr
= oberon_new_operator(OP_NEQ
, result
, a
, b
); break;
1837 case LESS
: expr
= oberon_new_operator(OP_LSS
, result
, a
, b
); break;
1838 case LEQ
: expr
= oberon_new_operator(OP_LEQ
, result
, a
, b
); break;
1839 case GREAT
: expr
= oberon_new_operator(OP_GRT
, result
, a
, b
); break;
1840 case GEQ
: expr
= oberon_new_operator(OP_GEQ
, result
, a
, b
); break;
1841 case OR
: expr
= oberon_new_operator(OP_LOGIC_OR
, result
, a
, b
); break;
1842 case AND
: expr
= oberon_new_operator(OP_LOGIC_AND
, result
, a
, b
); break;
1843 default: assert(0); break;
1847 else if(token
== SLASH
)
1849 if(oberon_is_set_type(a
-> result
) && oberon_is_set_type(b
-> result
))
1851 if(oberon_is_const(a
) && oberon_is_const(b
))
1853 int64_t x
= a
-> item
.integer
;
1854 int64_t y
= b
-> item
.integer
;
1855 expr
= oberon_make_set(ctx
, x
^ y
);
1859 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1860 a
= oberon_cast_expr(ctx
, a
, result
);
1861 b
= oberon_cast_expr(ctx
, b
, result
);
1862 expr
= oberon_new_operator(OP_SYM_DIFFERENCE
, result
, a
, b
);
1867 result
= oberon_get_longer_real_type(ctx
, a
-> result
, b
-> result
);
1868 if(oberon_is_const(a
) && oberon_is_const(b
))
1870 double x
= a
-> item
.real
;
1871 double y
= b
-> item
.real
;
1872 expr
= oberon_make_real_typed(ctx
, x
/ y
, result
);
1876 a
= oberon_cast_expr(ctx
, a
, result
);
1877 b
= oberon_cast_expr(ctx
, b
, result
);
1878 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
1884 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1886 if(oberon_is_const(a
) && oberon_is_const(b
))
1888 if(oberon_is_set_type(result
))
1890 int64_t x
= a
-> item
.integer
;
1891 int64_t y
= b
-> item
.integer
;
1894 case PLUS
: expr
= oberon_make_set(ctx
, x
| y
); break;
1895 case MINUS
: expr
= oberon_make_set(ctx
, x
& ~y
); break;
1896 case STAR
: expr
= oberon_make_set(ctx
, x
& y
); break;
1897 default: assert(0); break;
1900 if(oberon_is_real_type(result
))
1902 double x
= a
-> item
.real
;
1903 double y
= b
-> item
.real
;
1906 case PLUS
: expr
= oberon_make_real_typed(ctx
, x
+ y
, result
); break;
1907 case MINUS
: expr
= oberon_make_real_typed(ctx
, x
- y
, result
); break;
1908 case STAR
: expr
= oberon_make_real_typed(ctx
, x
* y
, result
); break;
1909 default: assert(0); break;
1912 else if(oberon_is_integer_type(result
))
1914 int64_t x
= a
-> item
.integer
;
1915 int64_t y
= b
-> item
.integer
;
1918 case PLUS
: expr
= oberon_make_integer(ctx
, x
+ y
); break;
1919 case MINUS
: expr
= oberon_make_integer(ctx
, x
- y
); break;
1920 case STAR
: expr
= oberon_make_integer(ctx
, x
* y
); break;
1921 case DIV
: expr
= oberon_make_integer(ctx
, x
/ y
); break;
1922 case MOD
: expr
= oberon_make_integer(ctx
, x
% y
); break;
1923 default: assert(0); break;
1933 a
= oberon_cast_expr(ctx
, a
, result
);
1934 b
= oberon_cast_expr(ctx
, b
, result
);
1937 if(oberon_is_set_type(result
))
1942 expr
= oberon_new_operator(OP_UNION
, result
, a
, b
);
1945 expr
= oberon_new_operator(OP_DIFFERENCE
, result
, a
, b
);
1948 expr
= oberon_new_operator(OP_INTERSECTION
, result
, a
, b
);
1955 else if(oberon_is_number_type(result
))
1960 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
1963 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
1966 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
1983 #define ISMULOP(x) \
1984 ((x) >= STAR && (x) <= AND)
1986 static oberon_expr_t
*
1987 oberon_term_expr(oberon_context_t
* ctx
)
1989 oberon_expr_t
* expr
;
1991 expr
= oberon_factor(ctx
);
1992 while(ISMULOP(ctx
-> token
))
1994 int token
= ctx
-> token
;
1995 oberon_read_token(ctx
);
1997 oberon_expr_t
* inter
= oberon_factor(ctx
);
1998 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2004 #define ISADDOP(x) \
2005 ((x) >= PLUS && (x) <= OR)
2007 static oberon_expr_t
*
2008 oberon_simple_expr(oberon_context_t
* ctx
)
2010 oberon_expr_t
* expr
;
2013 if(ctx
-> token
== PLUS
)
2016 oberon_assert_token(ctx
, PLUS
);
2018 else if(ctx
-> token
== MINUS
)
2021 oberon_assert_token(ctx
, MINUS
);
2024 expr
= oberon_term_expr(ctx
);
2026 while(ISADDOP(ctx
-> token
))
2028 int token
= ctx
-> token
;
2029 oberon_read_token(ctx
);
2031 oberon_expr_t
* inter
= oberon_term_expr(ctx
);
2032 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2037 expr
= oberon_make_unary_op(ctx
, MINUS
, expr
);
2043 #define ISRELATION(x) \
2044 ((x) >= EQUAL && (x) <= IS)
2046 static oberon_expr_t
*
2047 oberon_expr(oberon_context_t
* ctx
)
2049 oberon_expr_t
* expr
;
2051 expr
= oberon_simple_expr(ctx
);
2052 while(ISRELATION(ctx
-> token
))
2054 int token
= ctx
-> token
;
2055 oberon_read_token(ctx
);
2057 oberon_expr_t
* inter
= oberon_simple_expr(ctx
);
2058 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2065 oberon_is_const(oberon_expr_t
* expr
)
2067 if(expr
-> is_item
== false)
2072 switch(expr
-> item
.mode
)
2094 oberon_check_const(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2096 if(!oberon_is_const(expr
))
2098 oberon_error(ctx
, "const expression are required");
2102 static oberon_item_t
*
2103 oberon_const_expr(oberon_context_t
* ctx
)
2105 oberon_expr_t
* expr
;
2106 expr
= oberon_expr(ctx
);
2107 oberon_check_const(ctx
, expr
);
2108 return (oberon_item_t
*) expr
;
2111 // =======================================================================
2113 // =======================================================================
2115 static void oberon_decl_seq(oberon_context_t
* ctx
);
2116 static void oberon_statement_seq(oberon_context_t
* ctx
);
2117 static void oberon_initialize_decl(oberon_context_t
* ctx
);
2120 oberon_expect_token(oberon_context_t
* ctx
, int token
)
2122 if(ctx
-> token
!= token
)
2124 oberon_error(ctx
, "unexpected token %i (%i)", ctx
-> token
, token
);
2129 oberon_assert_token(oberon_context_t
* ctx
, int token
)
2131 oberon_expect_token(ctx
, token
);
2132 oberon_read_token(ctx
);
2136 oberon_assert_ident(oberon_context_t
* ctx
)
2138 oberon_expect_token(ctx
, IDENT
);
2139 char * ident
= ctx
-> string
;
2140 oberon_read_token(ctx
);
2145 oberon_def(oberon_context_t
* ctx
, int * export
, int * read_only
)
2147 switch(ctx
-> token
)
2150 oberon_assert_token(ctx
, STAR
);
2155 oberon_assert_token(ctx
, MINUS
);
2166 static oberon_object_t
*
2167 oberon_ident_def(oberon_context_t
* ctx
, int class, bool check_upscope
)
2172 oberon_object_t
* x
;
2174 name
= oberon_assert_ident(ctx
);
2175 oberon_def(ctx
, &export
, &read_only
);
2177 x
= oberon_define_object(ctx
-> decl
, name
, class, export
, read_only
, check_upscope
);
2182 oberon_ident_list(oberon_context_t
* ctx
, int class, bool check_upscope
, int * num
, oberon_object_t
** list
)
2185 *list
= oberon_ident_def(ctx
, class, check_upscope
);
2186 while(ctx
-> token
== COMMA
)
2188 oberon_assert_token(ctx
, COMMA
);
2189 oberon_ident_def(ctx
, class, check_upscope
);
2195 oberon_var_decl(oberon_context_t
* ctx
)
2198 oberon_object_t
* list
;
2199 oberon_type_t
* type
;
2200 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2202 oberon_ident_list(ctx
, OBERON_CLASS_VAR
, false, &num
, &list
);
2203 oberon_assert_token(ctx
, COLON
);
2204 oberon_type(ctx
, &type
);
2206 oberon_object_t
* var
= list
;
2207 for(int i
= 0; i
< num
; i
++)
2214 static oberon_object_t
*
2215 oberon_fp_section(oberon_context_t
* ctx
, int * num_decl
)
2217 int class = OBERON_CLASS_PARAM
;
2218 if(ctx
-> token
== VAR
)
2220 oberon_read_token(ctx
);
2221 class = OBERON_CLASS_VAR_PARAM
;
2225 oberon_object_t
* list
;
2226 oberon_ident_list(ctx
, class, false, &num
, &list
);
2228 oberon_assert_token(ctx
, COLON
);
2230 oberon_type_t
* type
;
2231 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2232 oberon_type(ctx
, &type
);
2234 oberon_object_t
* param
= list
;
2235 for(int i
= 0; i
< num
; i
++)
2237 param
-> type
= type
;
2238 param
= param
-> next
;
2245 #define ISFPSECTION \
2246 ((ctx -> token == VAR) || (ctx -> token == IDENT))
2249 oberon_formal_pars(oberon_context_t
* ctx
, oberon_type_t
* signature
)
2251 oberon_assert_token(ctx
, LPAREN
);
2255 signature
-> decl
= oberon_fp_section(ctx
, &signature
-> num_decl
);
2256 while(ctx
-> token
== SEMICOLON
)
2258 oberon_assert_token(ctx
, SEMICOLON
);
2259 oberon_fp_section(ctx
, &signature
-> num_decl
);
2263 oberon_assert_token(ctx
, RPAREN
);
2265 if(ctx
-> token
== COLON
)
2267 oberon_assert_token(ctx
, COLON
);
2269 oberon_object_t
* typeobj
;
2270 typeobj
= oberon_qualident(ctx
, NULL
, 1);
2271 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2273 oberon_error(ctx
, "function result is not type");
2275 if(typeobj
-> type
-> class == OBERON_TYPE_RECORD
2276 || typeobj
-> type
-> class == OBERON_TYPE_ARRAY
)
2278 oberon_error(ctx
, "records or arrays could not be result of function");
2280 signature
-> base
= typeobj
-> type
;
2285 oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
)
2287 oberon_type_t
* signature
;
2289 signature
-> class = OBERON_TYPE_PROCEDURE
;
2290 signature
-> num_decl
= 0;
2291 signature
-> base
= ctx
-> notype_type
;
2292 signature
-> decl
= NULL
;
2294 if(ctx
-> token
== LPAREN
)
2296 oberon_formal_pars(ctx
, signature
);
2301 oberon_compare_signatures(oberon_context_t
* ctx
, oberon_type_t
* a
, oberon_type_t
* b
)
2303 if(a
-> num_decl
!= b
-> num_decl
)
2305 oberon_error(ctx
, "number parameters not matched");
2308 int num_param
= a
-> num_decl
;
2309 oberon_object_t
* param_a
= a
-> decl
;
2310 oberon_object_t
* param_b
= b
-> decl
;
2311 for(int i
= 0; i
< num_param
; i
++)
2313 if(strcmp(param_a
-> name
, param_b
-> name
) != 0)
2315 oberon_error(ctx
, "param %i name not matched", i
+ 1);
2318 if(param_a
-> type
!= param_b
-> type
)
2320 oberon_error(ctx
, "param %i type not matched", i
+ 1);
2323 param_a
= param_a
-> next
;
2324 param_b
= param_b
-> next
;
2329 oberon_make_return(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2331 oberon_object_t
* proc
= ctx
-> decl
-> parent
;
2332 oberon_type_t
* result_type
= proc
-> type
-> base
;
2334 if(result_type
-> class == OBERON_TYPE_NOTYPE
)
2338 oberon_error(ctx
, "procedure has no result type");
2345 oberon_error(ctx
, "procedure requires expression on result");
2348 oberon_check_src(ctx
, expr
);
2349 oberon_check_assignment_compatible(ctx
, expr
, result_type
);
2350 expr
= oberon_cast_expr(ctx
, expr
, result_type
);
2353 proc
-> has_return
= 1;
2355 oberon_generate_return(ctx
, expr
);
2359 oberon_proc_decl_body(oberon_context_t
* ctx
, oberon_object_t
* proc
)
2361 oberon_assert_token(ctx
, SEMICOLON
);
2363 ctx
-> decl
= proc
-> scope
;
2365 oberon_decl_seq(ctx
);
2367 oberon_generate_begin_proc(ctx
, proc
);
2369 if(ctx
-> token
== BEGIN
)
2371 oberon_assert_token(ctx
, BEGIN
);
2372 oberon_statement_seq(ctx
);
2375 oberon_assert_token(ctx
, END
);
2376 char * name
= oberon_assert_ident(ctx
);
2377 if(strcmp(name
, proc
-> name
) != 0)
2379 oberon_error(ctx
, "procedure name not matched");
2382 if(proc
-> type
-> base
-> class == OBERON_TYPE_NOTYPE
2383 && proc
-> has_return
== 0)
2385 oberon_make_return(ctx
, NULL
);
2388 if(proc
-> has_return
== 0)
2390 oberon_error(ctx
, "procedure requires return");
2393 oberon_generate_end_proc(ctx
);
2394 oberon_close_scope(ctx
-> decl
);
2398 oberon_proc_decl(oberon_context_t
* ctx
)
2400 oberon_assert_token(ctx
, PROCEDURE
);
2403 if(ctx
-> token
== UPARROW
)
2405 oberon_assert_token(ctx
, UPARROW
);
2412 name
= oberon_assert_ident(ctx
);
2413 oberon_def(ctx
, &export
, &read_only
);
2415 oberon_scope_t
* proc_scope
;
2416 proc_scope
= oberon_open_scope(ctx
);
2417 ctx
-> decl
-> local
= 1;
2419 oberon_type_t
* signature
;
2420 signature
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2421 oberon_opt_formal_pars(ctx
, &signature
);
2423 //oberon_initialize_decl(ctx);
2424 oberon_generator_init_type(ctx
, signature
);
2425 oberon_close_scope(ctx
-> decl
);
2427 oberon_object_t
* proc
;
2428 proc
= oberon_find_object(ctx
-> decl
, name
, 0);
2431 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, export
, read_only
, false);
2432 proc
-> type
= signature
;
2433 proc
-> scope
= proc_scope
;
2434 oberon_generator_init_proc(ctx
, proc
);
2438 if(proc
-> class != OBERON_CLASS_PROC
)
2440 oberon_error(ctx
, "mult definition");
2447 oberon_error(ctx
, "mult procedure definition");
2451 if(proc
-> export
!= export
|| proc
-> read_only
!= read_only
)
2453 oberon_error(ctx
, "export type not matched");
2456 oberon_compare_signatures(ctx
, proc
-> type
, signature
);
2459 proc_scope
-> parent
= proc
;
2460 oberon_object_t
* param
= proc_scope
-> list
-> next
;
2463 param
-> parent
= proc
;
2464 param
= param
-> next
;
2470 oberon_proc_decl_body(ctx
, proc
);
2475 oberon_const_decl(oberon_context_t
* ctx
)
2477 oberon_item_t
* value
;
2478 oberon_object_t
* constant
;
2480 constant
= oberon_ident_def(ctx
, OBERON_CLASS_CONST
, false);
2481 oberon_assert_token(ctx
, EQUAL
);
2482 value
= oberon_const_expr(ctx
);
2483 constant
-> value
= value
;
2487 oberon_make_array_type(oberon_context_t
* ctx
, oberon_expr_t
* size
, oberon_type_t
* base
, oberon_type_t
** type
)
2489 if(size
-> is_item
== 0)
2491 oberon_error(ctx
, "requires constant");
2494 if(size
-> item
.mode
!= MODE_INTEGER
)
2496 oberon_error(ctx
, "requires integer constant");
2499 oberon_type_t
* arr
;
2501 arr
-> class = OBERON_TYPE_ARRAY
;
2502 arr
-> size
= size
-> item
.integer
;
2507 oberon_qualident_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2510 oberon_object_t
* to
;
2512 to
= oberon_qualident(ctx
, &name
, 0);
2514 //name = oberon_assert_ident(ctx);
2515 //to = oberon_find_object(ctx -> decl, name, 0);
2519 if(to
-> class != OBERON_CLASS_TYPE
)
2521 oberon_error(ctx
, "not a type");
2526 to
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, false, false, false);
2527 to
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2533 static void oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
);
2536 * Правило граматики "type". Указатель type должен указывать на существующий объект!
2540 oberon_make_multiarray(oberon_context_t
* ctx
, oberon_expr_t
* sizes
, oberon_type_t
* base
, oberon_type_t
** type
)
2548 oberon_type_t
* dim
;
2549 dim
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2551 oberon_make_multiarray(ctx
, sizes
-> next
, base
, &dim
);
2553 oberon_make_array_type(ctx
, sizes
, dim
, type
);
2557 oberon_make_open_array(oberon_context_t
* ctx
, oberon_type_t
* base
, oberon_type_t
* type
)
2559 type
-> class = OBERON_TYPE_ARRAY
;
2561 type
-> base
= base
;
2565 oberon_field_list(oberon_context_t
* ctx
, oberon_type_t
* rec
, oberon_scope_t
* modscope
)
2567 if(ctx
-> token
== IDENT
)
2570 oberon_object_t
* list
;
2571 oberon_type_t
* type
;
2572 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2574 oberon_ident_list(ctx
, OBERON_CLASS_FIELD
, true, &num
, &list
);
2575 oberon_assert_token(ctx
, COLON
);
2577 oberon_scope_t
* current
= ctx
-> decl
;
2578 ctx
-> decl
= modscope
;
2579 oberon_type(ctx
, &type
);
2580 ctx
-> decl
= current
;
2582 oberon_object_t
* field
= list
;
2583 for(int i
= 0; i
< num
; i
++)
2585 field
-> type
= type
;
2586 field
= field
-> next
;
2589 rec
-> num_decl
+= num
;
2594 oberon_type_record_body(oberon_context_t
* ctx
, oberon_type_t
* rec
)
2596 oberon_scope_t
* modscope
= ctx
-> mod
-> decl
;
2597 oberon_scope_t
* oldscope
= ctx
-> decl
;
2598 ctx
-> decl
= modscope
;
2600 if(ctx
-> token
== LPAREN
)
2602 oberon_assert_token(ctx
, LPAREN
);
2604 oberon_object_t
* typeobj
;
2605 typeobj
= oberon_qualident(ctx
, NULL
, true);
2607 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2609 oberon_error(ctx
, "base must be type");
2612 oberon_type_t
* base
= typeobj
-> type
;
2613 if(base
-> class == OBERON_TYPE_POINTER
)
2615 base
= base
-> base
;
2618 if(base
-> class != OBERON_TYPE_RECORD
)
2620 oberon_error(ctx
, "base must be record type");
2624 ctx
-> decl
= base
-> scope
;
2626 oberon_assert_token(ctx
, RPAREN
);
2633 oberon_scope_t
* this_scope
;
2634 this_scope
= oberon_open_scope(ctx
);
2635 this_scope
-> local
= true;
2636 this_scope
-> parent
= NULL
;
2637 this_scope
-> parent_type
= rec
;
2639 oberon_field_list(ctx
, rec
, modscope
);
2640 while(ctx
-> token
== SEMICOLON
)
2642 oberon_assert_token(ctx
, SEMICOLON
);
2643 oberon_field_list(ctx
, rec
, modscope
);
2646 rec
-> scope
= this_scope
;
2647 rec
-> decl
= this_scope
-> list
-> next
;
2648 ctx
-> decl
= oldscope
;
2652 oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2654 if(ctx
-> token
== IDENT
)
2656 oberon_qualident_type(ctx
, type
);
2658 else if(ctx
-> token
== ARRAY
)
2660 oberon_assert_token(ctx
, ARRAY
);
2663 oberon_expr_t
* sizes
;
2665 if(ISEXPR(ctx
-> token
))
2667 oberon_expr_list(ctx
, &num_sizes
, &sizes
, 1);
2670 oberon_assert_token(ctx
, OF
);
2672 oberon_type_t
* base
;
2673 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2674 oberon_type(ctx
, &base
);
2678 oberon_make_open_array(ctx
, base
, *type
);
2682 oberon_make_multiarray(ctx
, sizes
, base
, type
);
2685 else if(ctx
-> token
== RECORD
)
2687 oberon_type_t
* rec
;
2689 rec
-> class = OBERON_TYPE_RECORD
;
2690 rec
-> module
= ctx
-> mod
;
2692 oberon_assert_token(ctx
, RECORD
);
2693 oberon_type_record_body(ctx
, rec
);
2694 oberon_assert_token(ctx
, END
);
2698 else if(ctx
-> token
== POINTER
)
2700 oberon_assert_token(ctx
, POINTER
);
2701 oberon_assert_token(ctx
, TO
);
2703 oberon_type_t
* base
;
2704 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2705 oberon_type(ctx
, &base
);
2707 oberon_type_t
* ptr
;
2709 ptr
-> class = OBERON_TYPE_POINTER
;
2712 else if(ctx
-> token
== PROCEDURE
)
2714 oberon_open_scope(ctx
);
2715 oberon_assert_token(ctx
, PROCEDURE
);
2716 oberon_opt_formal_pars(ctx
, type
);
2717 oberon_close_scope(ctx
-> decl
);
2721 oberon_error(ctx
, "invalid type declaration");
2726 oberon_type_decl(oberon_context_t
* ctx
)
2729 oberon_object_t
* newtype
;
2730 oberon_type_t
* type
;
2734 name
= oberon_assert_ident(ctx
);
2735 oberon_def(ctx
, &export
, &read_only
);
2737 newtype
= oberon_find_object(ctx
-> decl
, name
, 0);
2740 newtype
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, export
, read_only
, false);
2741 newtype
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2742 assert(newtype
-> type
);
2746 if(newtype
-> class != OBERON_CLASS_TYPE
)
2748 oberon_error(ctx
, "mult definition");
2751 if(newtype
-> linked
)
2753 oberon_error(ctx
, "mult definition - already linked");
2756 newtype
-> export
= export
;
2757 newtype
-> read_only
= read_only
;
2760 oberon_assert_token(ctx
, EQUAL
);
2762 type
= newtype
-> type
;
2763 oberon_type(ctx
, &type
);
2765 if(type
-> class == OBERON_TYPE_NOTYPE
)
2767 oberon_error(ctx
, "recursive alias declaration");
2770 newtype
-> type
= type
;
2771 newtype
-> linked
= 1;
2774 static void oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2775 static void oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2778 oberon_prevent_recursive_pointer(oberon_context_t
* ctx
, oberon_type_t
* type
)
2780 if(type
-> class != OBERON_TYPE_POINTER
2781 && type
-> class != OBERON_TYPE_ARRAY
)
2786 if(type
-> recursive
)
2788 if(type
-> class == OBERON_TYPE_POINTER
)
2790 oberon_error(ctx
, "recursive pointer declaration");
2794 oberon_error(ctx
, "recursive array declaration (pointer)");
2798 if(type
-> class == OBERON_TYPE_POINTER
2799 && type
-> base
-> class == OBERON_TYPE_POINTER
)
2801 oberon_error(ctx
, "attempt to make pointer to pointer");
2804 type
-> recursive
= 1;
2806 oberon_prevent_recursive_pointer(ctx
, type
-> base
);
2808 type
-> recursive
= 0;
2812 oberon_prevent_recursive_record(oberon_context_t
* ctx
, oberon_type_t
* type
)
2814 if(type
-> class != OBERON_TYPE_RECORD
)
2819 if(type
-> recursive
)
2821 oberon_error(ctx
, "recursive record declaration");
2824 type
-> recursive
= 1;
2828 oberon_prevent_recursive_record(ctx
, type
-> base
);
2831 int num_fields
= type
-> num_decl
;
2832 oberon_object_t
* field
= type
-> decl
;
2833 for(int i
= 0; i
< num_fields
; i
++)
2835 oberon_prevent_recursive_object(ctx
, field
);
2836 field
= field
-> next
;
2839 type
-> recursive
= 0;
2842 oberon_prevent_recursive_procedure(oberon_context_t
* ctx
, oberon_type_t
* type
)
2844 if(type
-> class != OBERON_TYPE_PROCEDURE
)
2849 if(type
-> recursive
)
2851 oberon_error(ctx
, "recursive procedure declaration");
2854 type
-> recursive
= 1;
2856 int num_fields
= type
-> num_decl
;
2857 oberon_object_t
* field
= type
-> decl
;
2858 for(int i
= 0; i
< num_fields
; i
++)
2860 oberon_prevent_recursive_object(ctx
, field
);
2861 field
= field
-> next
;
2864 type
-> recursive
= 0;
2868 oberon_prevent_recursive_array(oberon_context_t
* ctx
, oberon_type_t
* type
)
2870 if(type
-> class != OBERON_TYPE_ARRAY
)
2875 if(type
-> recursive
)
2877 oberon_error(ctx
, "recursive array declaration");
2880 type
-> recursive
= 1;
2882 oberon_prevent_recursive_type(ctx
, type
-> base
);
2884 type
-> recursive
= 0;
2888 oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2890 if(type
-> class == OBERON_TYPE_POINTER
)
2892 oberon_prevent_recursive_pointer(ctx
, type
);
2894 else if(type
-> class == OBERON_TYPE_RECORD
)
2896 oberon_prevent_recursive_record(ctx
, type
);
2898 else if(type
-> class == OBERON_TYPE_ARRAY
)
2900 oberon_prevent_recursive_array(ctx
, type
);
2902 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2904 oberon_prevent_recursive_procedure(ctx
, type
);
2909 oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2913 case OBERON_CLASS_VAR
:
2914 case OBERON_CLASS_TYPE
:
2915 case OBERON_CLASS_PARAM
:
2916 case OBERON_CLASS_VAR_PARAM
:
2917 case OBERON_CLASS_FIELD
:
2918 oberon_prevent_recursive_type(ctx
, x
-> type
);
2920 case OBERON_CLASS_CONST
:
2921 case OBERON_CLASS_PROC
:
2922 case OBERON_CLASS_MODULE
:
2925 oberon_error(ctx
, "oberon_prevent_recursive_object: wat");
2931 oberon_prevent_recursive_decl(oberon_context_t
* ctx
)
2933 oberon_object_t
* x
= ctx
-> decl
-> list
-> next
;
2937 oberon_prevent_recursive_object(ctx
, x
);
2942 static void oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2943 static void oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2946 oberon_initialize_record_fields(oberon_context_t
* ctx
, oberon_type_t
* type
)
2948 assert(type
-> class == OBERON_TYPE_RECORD
);
2950 int num_fields
= type
-> num_decl
;
2951 oberon_object_t
* field
= type
-> decl
;
2952 for(int i
= 0; i
< num_fields
; i
++)
2954 oberon_initialize_object(ctx
, field
);
2955 field
= field
-> next
;
2958 oberon_generator_init_record(ctx
, type
);
2962 oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2964 if(type
-> class == OBERON_TYPE_NOTYPE
)
2966 oberon_error(ctx
, "undeclarated type");
2969 if(type
-> initialized
)
2974 type
-> initialized
= 1;
2976 if(type
-> class == OBERON_TYPE_POINTER
|| type
-> class == OBERON_TYPE_ARRAY
)
2978 if(type
-> class == OBERON_TYPE_ARRAY
2979 && type
-> size
!= 0
2980 && type
-> base
-> class == OBERON_TYPE_ARRAY
2981 && type
-> base
-> size
== 0)
2983 oberon_error(ctx
, "open array not allowed as array element");
2986 oberon_type_t
* rec
= type
-> base
;
2987 while(rec
-> class == OBERON_TYPE_ARRAY
|| rec
-> class == OBERON_TYPE_POINTER
)
2992 if(rec
-> class == OBERON_TYPE_RECORD
2993 && rec
-> initialized
== 0)
2995 rec
-> initialized
= 1;
2996 oberon_generator_init_type(ctx
, rec
);
2997 oberon_initialize_type(ctx
, type
-> base
);
2998 oberon_generator_init_type(ctx
, type
);
2999 oberon_initialize_record_fields(ctx
, rec
);
3003 oberon_initialize_type(ctx
, type
-> base
);
3004 oberon_generator_init_type(ctx
, type
);
3007 else if(type
-> class == OBERON_TYPE_RECORD
)
3009 printf("Init type: RECORD\n");
3010 oberon_generator_init_type(ctx
, type
);
3011 oberon_initialize_record_fields(ctx
, type
);
3013 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
3015 printf("Init type: PROCEDURE\n");
3016 int num_fields
= type
-> num_decl
;
3017 oberon_object_t
* field
= type
-> decl
;
3018 for(int i
= 0; i
< num_fields
; i
++)
3020 oberon_initialize_type(ctx
, field
-> type
);
3021 field
= field
-> next
;
3024 oberon_generator_init_type(ctx
, type
);
3028 oberon_generator_init_type(ctx
, type
);
3033 oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
3035 if(x
-> initialized
)
3040 x
-> initialized
= 1;
3044 case OBERON_CLASS_TYPE
:
3045 oberon_initialize_type(ctx
, x
-> type
);
3047 case OBERON_CLASS_VAR
:
3048 case OBERON_CLASS_FIELD
:
3049 if(x
-> type
-> class == OBERON_TYPE_ARRAY
)
3051 if(x
-> type
-> size
== 0)
3053 oberon_error(ctx
, "open array not allowed as variable or field");
3056 oberon_initialize_type(ctx
, x
-> type
);
3057 oberon_generator_init_var(ctx
, x
);
3059 case OBERON_CLASS_PARAM
:
3060 case OBERON_CLASS_VAR_PARAM
:
3061 oberon_initialize_type(ctx
, x
-> type
);
3062 oberon_generator_init_var(ctx
, x
);
3064 case OBERON_CLASS_CONST
:
3065 case OBERON_CLASS_PROC
:
3066 case OBERON_CLASS_MODULE
:
3069 oberon_error(ctx
, "oberon_initialize_object: wat");
3075 oberon_initialize_decl(oberon_context_t
* ctx
)
3077 oberon_object_t
* x
= ctx
-> decl
-> list
;
3081 oberon_initialize_object(ctx
, x
-> next
);
3087 oberon_prevent_undeclarated_procedures(oberon_context_t
* ctx
)
3089 oberon_object_t
* x
= ctx
-> decl
-> list
;
3093 if(x
-> next
-> class == OBERON_CLASS_PROC
)
3095 if(x
-> next
-> linked
== 0)
3097 oberon_error(ctx
, "unresolved forward declaration");
3105 oberon_decl_seq(oberon_context_t
* ctx
)
3107 if(ctx
-> token
== CONST
)
3109 oberon_assert_token(ctx
, CONST
);
3110 while(ctx
-> token
== IDENT
)
3112 oberon_const_decl(ctx
);
3113 oberon_assert_token(ctx
, SEMICOLON
);
3117 if(ctx
-> token
== TYPE
)
3119 oberon_assert_token(ctx
, TYPE
);
3120 while(ctx
-> token
== IDENT
)
3122 oberon_type_decl(ctx
);
3123 oberon_assert_token(ctx
, SEMICOLON
);
3127 if(ctx
-> token
== VAR
)
3129 oberon_assert_token(ctx
, VAR
);
3130 while(ctx
-> token
== IDENT
)
3132 oberon_var_decl(ctx
);
3133 oberon_assert_token(ctx
, SEMICOLON
);
3137 oberon_prevent_recursive_decl(ctx
);
3138 oberon_initialize_decl(ctx
);
3140 while(ctx
-> token
== PROCEDURE
)
3142 oberon_proc_decl(ctx
);
3143 oberon_assert_token(ctx
, SEMICOLON
);
3146 oberon_prevent_undeclarated_procedures(ctx
);
3149 static oberon_expr_t
*
3150 oberon_make_temp_var_item(oberon_context_t
* ctx
, oberon_type_t
* type
)
3152 oberon_object_t
* x
;
3153 oberon_expr_t
* expr
;
3155 x
= oberon_create_object(ctx
-> decl
, "TEMP", OBERON_CLASS_VAR
, false, false);
3158 oberon_generator_init_temp_var(ctx
, x
);
3160 expr
= oberon_new_item(MODE_VAR
, type
, false);
3161 expr
-> item
.var
= x
;
3166 oberon_statement_seq(oberon_context_t
* ctx
);
3169 oberon_assign(oberon_context_t
* ctx
, oberon_expr_t
* src
, oberon_expr_t
* dst
)
3171 oberon_check_dst(ctx
, dst
);
3172 oberon_check_assignment_compatible(ctx
, src
, dst
-> result
);
3174 if(oberon_is_array_of_char_type(dst
-> result
)
3175 && oberon_is_string_type(src
-> result
))
3178 oberon_make_copy_call(ctx
, 2, src
);
3182 src
= oberon_cast_expr(ctx
, src
, dst
-> result
);
3183 oberon_generate_assign(ctx
, src
, dst
);
3187 static oberon_expr_t
*
3188 oberon_case_labels(oberon_context_t
* ctx
, oberon_expr_t
* val
)
3192 oberon_expr_t
* cond
;
3193 oberon_expr_t
* cond2
;
3195 e1
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3198 if(ctx
-> token
== DOTDOT
)
3200 oberon_assert_token(ctx
, DOTDOT
);
3201 e2
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3207 cond
= oberon_make_bin_op(ctx
, EQUAL
, val
, e1
);
3211 /* val >= e1 && val <= e2 */
3212 cond
= oberon_make_bin_op(ctx
, GEQ
, val
, e1
);
3213 cond2
= oberon_make_bin_op(ctx
, LEQ
, val
, e2
);
3214 cond
= oberon_make_bin_op(ctx
, AND
, cond
, cond2
);
3221 oberon_case(oberon_context_t
* ctx
, oberon_expr_t
* val
, gen_label_t
* end
)
3223 oberon_expr_t
* cond
;
3224 oberon_expr_t
* cond2
;
3225 gen_label_t
* this_end
;
3227 if(ISEXPR(ctx
-> token
))
3229 this_end
= oberon_generator_reserve_label(ctx
);
3231 cond
= oberon_case_labels(ctx
, val
);
3232 while(ctx
-> token
== COMMA
)
3234 oberon_assert_token(ctx
, COMMA
);
3236 cond2
= oberon_case_labels(ctx
, val
);
3237 cond
= oberon_make_bin_op(ctx
, OR
, cond
, cond2
);
3239 oberon_assert_token(ctx
, COLON
);
3241 oberon_generate_branch(ctx
, cond
, false, this_end
);
3242 oberon_statement_seq(ctx
);
3243 oberon_generate_goto(ctx
, end
);
3245 oberon_generate_label(ctx
, this_end
);
3250 oberon_case_statement(oberon_context_t
* ctx
)
3252 oberon_expr_t
* val
;
3253 oberon_expr_t
* expr
;
3256 end
= oberon_generator_reserve_label(ctx
);
3258 oberon_assert_token(ctx
, CASE
);
3259 expr
= oberon_expr(ctx
);
3260 val
= oberon_make_temp_var_item(ctx
, expr
-> result
);
3261 oberon_assign(ctx
, expr
, val
);
3262 oberon_assert_token(ctx
, OF
);
3263 oberon_case(ctx
, val
, end
);
3264 while(ctx
-> token
== BAR
)
3266 oberon_assert_token(ctx
, BAR
);
3267 oberon_case(ctx
, val
, end
);
3270 if(ctx
-> token
== ELSE
)
3272 oberon_assert_token(ctx
, ELSE
);
3273 oberon_statement_seq(ctx
);
3277 oberon_generate_trap(ctx
, -1);
3280 oberon_generate_label(ctx
, end
);
3281 oberon_assert_token(ctx
, END
);
3285 oberon_with_guard_do(oberon_context_t
* ctx
, gen_label_t
* end
)
3287 oberon_expr_t
* val
;
3288 oberon_expr_t
* var
;
3289 oberon_expr_t
* type
;
3290 oberon_expr_t
* cond
;
3291 oberon_expr_t
* cast
;
3292 oberon_type_t
* old_type
;
3293 gen_var_t
* old_var
;
3294 gen_label_t
* this_end
;
3296 this_end
= oberon_generator_reserve_label(ctx
);
3298 var
= oberon_qualident_expr(ctx
);
3299 oberon_assert_token(ctx
, COLON
);
3300 type
= oberon_qualident_expr(ctx
);
3301 cond
= oberon_make_bin_op(ctx
, IS
, var
, type
);
3303 oberon_assert_token(ctx
, DO
);
3304 oberon_generate_branch(ctx
, cond
, false, this_end
);
3306 /* Сохраняем ссылку во временной переменной */
3307 val
= oberon_make_temp_var_item(ctx
, type
-> result
);
3308 //cast = oberno_make_record_cast(ctx, var, type -> result);
3309 cast
= oberon_cast_expr(ctx
, var
, type
-> result
);
3310 oberon_assign(ctx
, cast
, val
);
3311 /* Подменяем тип у оригинальной переменной */
3312 old_type
= var
-> item
.var
-> type
;
3313 var
-> item
.var
-> type
= type
-> result
;
3314 /* Подменяем ссылку на переменную */
3315 old_var
= var
-> item
.var
-> gen_var
;
3316 var
-> item
.var
-> gen_var
= val
-> item
.var
-> gen_var
;
3318 oberon_statement_seq(ctx
);
3319 oberon_generate_goto(ctx
, end
);
3320 oberon_generate_label(ctx
, this_end
);
3322 /* Возвращаем исходное состояние */
3323 var
-> item
.var
-> gen_var
= old_var
;
3324 var
-> item
.var
-> type
= old_type
;
3328 oberon_with_statement(oberon_context_t
* ctx
)
3331 end
= oberon_generator_reserve_label(ctx
);
3333 oberon_assert_token(ctx
, WITH
);
3334 oberon_with_guard_do(ctx
, end
);
3335 while(ctx
-> token
== BAR
)
3337 oberon_assert_token(ctx
, BAR
);
3338 oberon_with_guard_do(ctx
, end
);
3341 if(ctx
-> token
== ELSE
)
3343 oberon_assert_token(ctx
, ELSE
);
3344 oberon_statement_seq(ctx
);
3348 oberon_generate_trap(ctx
, -2);
3351 oberon_generate_label(ctx
, end
);
3352 oberon_assert_token(ctx
, END
);
3356 oberon_statement(oberon_context_t
* ctx
)
3358 oberon_expr_t
* item1
;
3359 oberon_expr_t
* item2
;
3361 if(ctx
-> token
== IDENT
)
3363 item1
= oberon_designator(ctx
);
3364 if(ctx
-> token
== ASSIGN
)
3366 oberon_assert_token(ctx
, ASSIGN
);
3367 item2
= oberon_expr(ctx
);
3368 oberon_assign(ctx
, item2
, item1
);
3372 oberon_opt_proc_parens(ctx
, item1
);
3375 else if(ctx
-> token
== IF
)
3379 oberon_expr_t
* cond
;
3381 els
= oberon_generator_reserve_label(ctx
);
3382 end
= oberon_generator_reserve_label(ctx
);
3384 oberon_assert_token(ctx
, IF
);
3385 cond
= oberon_expr(ctx
);
3386 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3388 oberon_error(ctx
, "condition must be boolean");
3390 oberon_assert_token(ctx
, THEN
);
3391 oberon_generate_branch(ctx
, cond
, false, els
);
3392 oberon_statement_seq(ctx
);
3393 oberon_generate_goto(ctx
, end
);
3394 oberon_generate_label(ctx
, els
);
3396 while(ctx
-> token
== ELSIF
)
3398 els
= oberon_generator_reserve_label(ctx
);
3400 oberon_assert_token(ctx
, ELSIF
);
3401 cond
= oberon_expr(ctx
);
3402 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3404 oberon_error(ctx
, "condition must be boolean");
3406 oberon_assert_token(ctx
, THEN
);
3407 oberon_generate_branch(ctx
, cond
, false, els
);
3408 oberon_statement_seq(ctx
);
3409 oberon_generate_goto(ctx
, end
);
3410 oberon_generate_label(ctx
, els
);
3413 if(ctx
-> token
== ELSE
)
3415 oberon_assert_token(ctx
, ELSE
);
3416 oberon_statement_seq(ctx
);
3419 oberon_generate_label(ctx
, end
);
3420 oberon_assert_token(ctx
, END
);
3422 else if(ctx
-> token
== WHILE
)
3424 gen_label_t
* begin
;
3426 oberon_expr_t
* cond
;
3428 begin
= oberon_generator_reserve_label(ctx
);
3429 end
= oberon_generator_reserve_label(ctx
);
3431 oberon_assert_token(ctx
, WHILE
);
3432 oberon_generate_label(ctx
, begin
);
3433 cond
= oberon_expr(ctx
);
3434 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3436 oberon_error(ctx
, "condition must be boolean");
3438 oberon_generate_branch(ctx
, cond
, false, end
);
3440 oberon_assert_token(ctx
, DO
);
3441 oberon_statement_seq(ctx
);
3442 oberon_generate_goto(ctx
, begin
);
3444 oberon_assert_token(ctx
, END
);
3445 oberon_generate_label(ctx
, end
);
3447 else if(ctx
-> token
== REPEAT
)
3449 gen_label_t
* begin
;
3450 oberon_expr_t
* cond
;
3452 begin
= oberon_generator_reserve_label(ctx
);
3453 oberon_generate_label(ctx
, begin
);
3454 oberon_assert_token(ctx
, REPEAT
);
3456 oberon_statement_seq(ctx
);
3458 oberon_assert_token(ctx
, UNTIL
);
3460 cond
= oberon_expr(ctx
);
3461 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3463 oberon_error(ctx
, "condition must be boolean");
3466 oberon_generate_branch(ctx
, cond
, true, begin
);
3468 else if(ctx
-> token
== FOR
)
3470 oberon_expr_t
* from
;
3471 oberon_expr_t
* index
;
3473 oberon_expr_t
* bound
;
3475 oberon_expr_t
* cond
;
3476 oberon_expr_t
* count
;
3477 gen_label_t
* begin
;
3482 begin
= oberon_generator_reserve_label(ctx
);
3483 end
= oberon_generator_reserve_label(ctx
);
3485 oberon_assert_token(ctx
, FOR
);
3486 iname
= oberon_assert_ident(ctx
);
3487 index
= oberon_ident_item(ctx
, iname
);
3488 oberon_assert_token(ctx
, ASSIGN
);
3489 from
= oberon_expr(ctx
);
3490 oberon_assert_token(ctx
, TO
);
3491 bound
= oberon_make_temp_var_item(ctx
, index
-> result
);
3492 to
= oberon_expr(ctx
);
3493 oberon_assign(ctx
, to
, bound
); // сначала temp
3494 oberon_assign(ctx
, from
, index
); // потом i
3495 if(ctx
-> token
== BY
)
3497 oberon_assert_token(ctx
, BY
);
3498 by
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3502 by
= oberon_make_integer(ctx
, 1);
3505 if(by
-> result
-> class != OBERON_TYPE_INTEGER
)
3507 oberon_error(ctx
, "must be integer");
3510 if(by
-> item
.integer
> 0)
3514 else if(by
-> item
.integer
< 0)
3520 oberon_error(ctx
, "zero step not allowed");
3523 oberon_assert_token(ctx
, DO
);
3524 oberon_generate_label(ctx
, begin
);
3525 cond
= oberon_make_bin_op(ctx
, op
, index
, bound
);
3526 oberon_generate_branch(ctx
, cond
, false, end
);
3527 oberon_statement_seq(ctx
);
3528 count
= oberon_make_bin_op(ctx
, PLUS
, index
, by
);
3529 oberon_assign(ctx
, count
, index
);
3530 oberon_generate_goto(ctx
, begin
);
3531 oberon_generate_label(ctx
, end
);
3532 oberon_assert_token(ctx
, END
);
3534 else if(ctx
-> token
== LOOP
)
3536 gen_label_t
* begin
;
3539 begin
= oberon_generator_reserve_label(ctx
);
3540 end
= oberon_generator_reserve_label(ctx
);
3542 oberon_open_scope(ctx
);
3543 oberon_assert_token(ctx
, LOOP
);
3544 oberon_generate_label(ctx
, begin
);
3545 ctx
-> decl
-> exit_label
= end
;
3546 oberon_statement_seq(ctx
);
3547 oberon_generate_goto(ctx
, begin
);
3548 oberon_generate_label(ctx
, end
);
3549 oberon_assert_token(ctx
, END
);
3550 oberon_close_scope(ctx
-> decl
);
3552 else if(ctx
-> token
== EXIT
)
3554 oberon_assert_token(ctx
, EXIT
);
3555 if(ctx
-> decl
-> exit_label
== NULL
)
3557 oberon_error(ctx
, "not in LOOP-END");
3559 oberon_generate_goto(ctx
, ctx
-> decl
-> exit_label
);
3561 else if(ctx
-> token
== CASE
)
3563 oberon_case_statement(ctx
);
3565 else if(ctx
-> token
== WITH
)
3567 oberon_with_statement(ctx
);
3569 else if(ctx
-> token
== RETURN
)
3571 oberon_assert_token(ctx
, RETURN
);
3572 if(ISEXPR(ctx
-> token
))
3574 oberon_expr_t
* expr
;
3575 expr
= oberon_expr(ctx
);
3576 oberon_make_return(ctx
, expr
);
3580 oberon_make_return(ctx
, NULL
);
3586 oberon_statement_seq(oberon_context_t
* ctx
)
3588 oberon_statement(ctx
);
3589 while(ctx
-> token
== SEMICOLON
)
3591 oberon_assert_token(ctx
, SEMICOLON
);
3592 oberon_statement(ctx
);
3597 oberon_import_module(oberon_context_t
* ctx
, char * alias
, char * name
)
3599 oberon_module_t
* m
= ctx
-> module_list
;
3600 while(m
&& strcmp(m
-> name
, name
) != 0)
3607 oberon_scanner_t
* s
;
3608 s
= ctx
-> import_module(name
);
3611 oberon_error(ctx
, "no such module %s", name
);
3614 m
= oberon_compile_module(ctx
, s
);
3620 oberon_error(ctx
, "cyclic module import");
3623 oberon_object_t
* ident
;
3624 ident
= oberon_define_object(ctx
-> decl
, alias
, OBERON_CLASS_MODULE
, false, false, false);
3625 ident
-> module
= m
;
3629 oberon_import_decl(oberon_context_t
* ctx
)
3634 alias
= name
= oberon_assert_ident(ctx
);
3635 if(ctx
-> token
== ASSIGN
)
3637 oberon_assert_token(ctx
, ASSIGN
);
3638 name
= oberon_assert_ident(ctx
);
3641 oberon_import_module(ctx
, alias
, name
);
3645 oberon_import_list(oberon_context_t
* ctx
)
3647 oberon_assert_token(ctx
, IMPORT
);
3649 oberon_import_decl(ctx
);
3650 while(ctx
-> token
== COMMA
)
3652 oberon_assert_token(ctx
, COMMA
);
3653 oberon_import_decl(ctx
);
3656 oberon_assert_token(ctx
, SEMICOLON
);
3660 oberon_parse_module(oberon_context_t
* ctx
)
3664 oberon_read_token(ctx
);
3666 oberon_assert_token(ctx
, MODULE
);
3667 name1
= oberon_assert_ident(ctx
);
3668 oberon_assert_token(ctx
, SEMICOLON
);
3669 ctx
-> mod
-> name
= name1
;
3671 oberon_generator_init_module(ctx
, ctx
-> mod
);
3673 if(ctx
-> token
== IMPORT
)
3675 oberon_import_list(ctx
);
3678 oberon_decl_seq(ctx
);
3680 oberon_generate_begin_module(ctx
);
3681 if(ctx
-> token
== BEGIN
)
3683 oberon_assert_token(ctx
, BEGIN
);
3684 oberon_statement_seq(ctx
);
3686 oberon_generate_end_module(ctx
);
3688 oberon_assert_token(ctx
, END
);
3689 name2
= oberon_assert_ident(ctx
);
3690 oberon_expect_token(ctx
, DOT
);
3692 if(strcmp(name1
, name2
) != 0)
3694 oberon_error(ctx
, "module name not matched");
3697 oberon_generator_fini_module(ctx
-> mod
);
3700 // =======================================================================
3702 // =======================================================================
3704 static oberon_expr_t
*
3705 oberon_make_min_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3709 oberon_error(ctx
, "too few arguments");
3714 oberon_error(ctx
, "too mach arguments");
3717 oberon_expr_t
* arg
;
3720 if(!oberon_is_type_expr(arg
))
3722 oberon_error(ctx
, "MIN accept only type");
3725 oberon_expr_t
* expr
;
3726 int bits
= arg
-> result
-> size
* 8;
3727 switch(arg
-> result
-> class)
3729 case OBERON_TYPE_INTEGER
:
3730 expr
= oberon_make_integer(ctx
, -powl(2, bits
- 1));
3732 case OBERON_TYPE_BOOLEAN
:
3733 expr
= oberon_make_boolean(ctx
, false);
3735 case OBERON_TYPE_CHAR
:
3736 expr
= oberon_make_char(ctx
, 0);
3738 case OBERON_TYPE_REAL
:
3739 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (-FLT_MAX
) : (-DBL_MAX
), arg
-> result
);
3741 case OBERON_TYPE_SET
:
3742 expr
= oberon_make_integer(ctx
, 0);
3745 oberon_error(ctx
, "allowed only basic types");
3752 static oberon_expr_t
*
3753 oberon_make_max_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3757 oberon_error(ctx
, "too few arguments");
3762 oberon_error(ctx
, "too mach arguments");
3765 oberon_expr_t
* arg
;
3768 if(!oberon_is_type_expr(arg
))
3770 oberon_error(ctx
, "MAX accept only type");
3773 oberon_expr_t
* expr
;
3774 int bits
= arg
-> result
-> size
* 8;
3775 switch(arg
-> result
-> class)
3777 case OBERON_TYPE_INTEGER
:
3778 expr
= oberon_make_integer(ctx
, powl(2, bits
- 1) - 1);
3780 case OBERON_TYPE_BOOLEAN
:
3781 expr
= oberon_make_boolean(ctx
, true);
3783 case OBERON_TYPE_CHAR
:
3784 expr
= oberon_make_char(ctx
, powl(2, bits
) - 1);
3786 case OBERON_TYPE_REAL
:
3787 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (FLT_MAX
) : (DBL_MAX
), arg
-> result
);
3789 case OBERON_TYPE_SET
:
3790 expr
= oberon_make_integer(ctx
, bits
);
3793 oberon_error(ctx
, "allowed only basic types");
3800 static oberon_expr_t
*
3801 oberon_make_size_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3805 oberon_error(ctx
, "too few arguments");
3810 oberon_error(ctx
, "too mach arguments");
3813 oberon_expr_t
* arg
;
3815 if(!oberon_is_type_expr(arg
))
3817 oberon_error(ctx
, "SIZE accept only type");
3821 oberon_expr_t
* expr
;
3822 oberon_type_t
* type
= arg
-> result
;
3823 switch(type
-> class)
3825 case OBERON_TYPE_INTEGER
:
3826 case OBERON_TYPE_BOOLEAN
:
3827 case OBERON_TYPE_REAL
:
3828 case OBERON_TYPE_CHAR
:
3829 case OBERON_TYPE_SET
:
3830 size
= type
-> size
;
3833 oberon_error(ctx
, "TODO SIZE");
3837 expr
= oberon_make_integer(ctx
, size
);
3841 static oberon_expr_t
*
3842 oberon_make_abs_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3846 oberon_error(ctx
, "too few arguments");
3851 oberon_error(ctx
, "too mach arguments");
3854 oberon_expr_t
* arg
;
3856 oberon_check_src(ctx
, arg
);
3858 if(oberon_is_number_type(arg
-> result
))
3860 oberon_error(ctx
, "ABS accepts only numbers");
3863 oberon_expr_t
* expr
;
3864 if(oberon_is_const(arg
))
3866 if(oberon_is_real_type(arg
-> result
))
3868 double x
= arg
-> item
.real
;
3869 expr
= oberon_make_real(ctx
, fabsl(x
), arg
-> result
);
3873 int64_t x
= arg
-> item
.integer
;
3874 expr
= oberon_make_integer(ctx
, llabs(x
));
3879 expr
= oberon_new_operator(OP_ABS
, arg
-> result
, arg
, NULL
);
3885 oberon_make_inc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3889 oberon_error(ctx
, "too few arguments");
3894 oberon_error(ctx
, "too mach arguments");
3897 oberon_expr_t
* dst
;
3899 oberon_check_dst(ctx
, dst
);
3901 if(!oberon_is_integer_type(dst
-> result
))
3903 oberon_error(ctx
, "expect integer");
3906 oberon_expr_t
* expr
;
3907 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_make_integer(ctx
, 1));
3908 oberon_assign(ctx
, expr
, dst
);
3912 oberon_make_incl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3916 oberon_error(ctx
, "too few arguments");
3921 oberon_error(ctx
, "too mach arguments");
3924 oberon_expr_t
* dst
;
3926 oberon_check_dst(ctx
, dst
);
3928 if(!oberon_is_set_type(dst
-> result
))
3930 oberon_error(ctx
, "expect integer");
3934 x
= list_args
-> next
;
3935 oberon_check_src(ctx
, x
);
3937 if(!oberon_is_integer_type(x
-> result
))
3939 oberon_error(ctx
, "expect integer");
3942 oberon_expr_t
* expr
;
3943 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
3944 oberon_assign(ctx
, expr
, dst
);
3948 oberon_make_excl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3952 oberon_error(ctx
, "too few arguments");
3957 oberon_error(ctx
, "too mach arguments");
3960 oberon_expr_t
* dst
;
3962 oberon_check_dst(ctx
, dst
);
3964 if(!oberon_is_set_type(dst
-> result
))
3966 oberon_error(ctx
, "expect integer");
3970 x
= list_args
-> next
;
3971 oberon_check_src(ctx
, x
);
3973 if(!oberon_is_integer_type(x
-> result
))
3975 oberon_error(ctx
, "expect integer");
3978 oberon_expr_t
* expr
;
3979 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
3980 oberon_assign(ctx
, expr
, dst
);
3984 oberon_make_dec_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3988 oberon_error(ctx
, "too few arguments");
3993 oberon_error(ctx
, "too mach arguments");
3996 oberon_expr_t
* dst
;
3998 oberon_check_dst(ctx
, dst
);
4000 if(!oberon_is_integer_type(dst
-> result
))
4002 oberon_error(ctx
, "expect integer");
4005 oberon_expr_t
* expr
;
4006 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_make_integer(ctx
, 1));
4007 oberon_assign(ctx
, expr
, dst
);
4011 oberon_make_new_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4015 oberon_error(ctx
, "too few arguments");
4018 oberon_expr_t
* dst
;
4020 oberon_check_dst(ctx
, dst
);
4022 oberon_type_t
* type
;
4023 type
= dst
-> result
;
4025 if(type
-> class != OBERON_TYPE_POINTER
)
4027 oberon_error(ctx
, "not a pointer");
4030 type
= type
-> base
;
4032 oberon_expr_t
* src
;
4033 src
= oberon_new_item(MODE_NEW
, dst
-> result
, 0);
4034 src
-> item
.num_args
= 0;
4035 src
-> item
.args
= NULL
;
4038 if(type
-> class == OBERON_TYPE_ARRAY
)
4040 if(type
-> size
== 0)
4042 oberon_type_t
* x
= type
;
4043 while(x
-> class == OBERON_TYPE_ARRAY
)
4053 if(num_args
< max_args
)
4055 oberon_error(ctx
, "too few arguments");
4058 if(num_args
> max_args
)
4060 oberon_error(ctx
, "too mach arguments");
4063 int num_sizes
= max_args
- 1;
4064 oberon_expr_t
* size_list
= list_args
-> next
;
4066 oberon_expr_t
* arg
= size_list
;
4067 for(int i
= 0; i
< max_args
- 1; i
++)
4069 oberon_check_src(ctx
, arg
);
4070 if(arg
-> result
-> class != OBERON_TYPE_INTEGER
)
4072 oberon_error(ctx
, "size must be integer");
4077 src
-> item
.num_args
= num_sizes
;
4078 src
-> item
.args
= size_list
;
4080 else if(type
-> class != OBERON_TYPE_RECORD
)
4082 oberon_error(ctx
, "oberon_make_new_call: wat");
4085 if(num_args
> max_args
)
4087 oberon_error(ctx
, "too mach arguments");
4090 oberon_assign(ctx
, src
, dst
);
4094 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4098 oberon_error(ctx
, "too few arguments");
4103 oberon_error(ctx
, "too mach arguments");
4106 oberon_expr_t
* src
;
4108 oberon_check_src(ctx
, src
);
4110 oberon_expr_t
* dst
;
4111 dst
= list_args
-> next
;
4112 oberon_check_dst(ctx
, dst
);
4114 if(!oberon_is_string_type(src
-> result
) && !oberon_is_array_of_char_type(src
-> result
))
4116 oberon_error(ctx
, "source must be string or array of char");
4119 if(!oberon_is_array_of_char_type(dst
-> result
))
4121 oberon_error(ctx
, "dst must be array of char");
4124 oberon_generate_copy(ctx
, src
, dst
);
4128 oberon_make_assert_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4132 oberon_error(ctx
, "too few arguments");
4137 oberon_error(ctx
, "too mach arguments");
4140 oberon_expr_t
* cond
;
4142 oberon_check_src(ctx
, cond
);
4144 if(!oberon_is_boolean_type(cond
-> result
))
4146 oberon_error(ctx
, "expected boolean");
4151 oberon_generate_assert(ctx
, cond
);
4155 oberon_expr_t
* num
;
4156 num
= list_args
-> next
;
4157 oberon_check_src(ctx
, num
);
4159 if(!oberon_is_integer_type(num
-> result
))
4161 oberon_error(ctx
, "expected integer");
4164 oberon_check_const(ctx
, num
);
4166 oberon_generate_assert_n(ctx
, cond
, num
-> item
.integer
);
4171 oberon_make_halt_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4175 oberon_error(ctx
, "too few arguments");
4180 oberon_error(ctx
, "too mach arguments");
4183 oberon_expr_t
* num
;
4185 oberon_check_src(ctx
, num
);
4187 if(num
-> result
-> class != OBERON_TYPE_INTEGER
)
4189 oberon_error(ctx
, "expected integer");
4192 oberon_check_const(ctx
, num
);
4194 oberon_generate_halt(ctx
, num
-> item
.integer
);
4197 static oberon_expr_t
*
4198 oberon_make_ash_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4202 oberon_error(ctx
, "too few arguments");
4207 oberon_error(ctx
, "too mach arguments");
4210 oberon_expr_t
* arg1
;
4212 oberon_check_src(ctx
, arg1
);
4213 if(arg1
-> result
-> class != OBERON_TYPE_INTEGER
)
4215 oberon_error(ctx
, "expected integer");
4218 oberon_expr_t
* arg2
;
4219 arg2
= list_args
-> next
;
4220 oberon_check_src(ctx
, arg2
);
4221 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4223 oberon_error(ctx
, "expected integer");
4226 oberon_expr_t
* expr
;
4227 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4229 int64_t x
= arg1
-> item
.integer
;
4230 int64_t y
= arg2
-> item
.integer
;
4231 int64_t v
= (y
> 0) ? (x
<< y
) : (x
>> labs(y
));
4232 expr
= oberon_make_integer(ctx
, v
);
4236 expr
= oberon_new_operator(OP_ASH
, arg1
-> result
, arg1
, arg2
);
4242 static oberon_expr_t
*
4243 oberon_make_lsh_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4247 oberon_error(ctx
, "too few arguments");
4252 oberon_error(ctx
, "too mach arguments");
4255 oberon_expr_t
* arg1
;
4257 oberon_check_src(ctx
, arg1
);
4259 oberon_type_t
* t
= arg1
-> result
;
4260 if(!oberon_is_integer_type(t
)
4261 && !oberon_is_char_type(t
)
4262 && !oberon_is_system_byte_type(t
))
4264 oberon_error(ctx
, "expected integer, char, or SYSTEM.BYTE");
4267 oberon_expr_t
* arg2
;
4268 arg2
= list_args
-> next
;
4269 oberon_check_src(ctx
, arg2
);
4270 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4272 oberon_error(ctx
, "expected integer");
4275 oberon_expr_t
* expr
;
4276 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4278 uint64_t x
= arg1
-> item
.integer
;
4279 int64_t y
= arg2
-> item
.integer
;
4280 uint64_t v
= (y
> 0) ? (x
<< y
) : (x
>> labs(y
));
4282 if(oberon_is_integer_type(t
))
4284 expr
= oberon_make_integer(ctx
, v
);
4286 else if(oberon_is_char_type(t
))
4288 expr
= oberon_make_char(ctx
, v
);
4292 expr
= oberon_make_system_byte(ctx
, v
);
4297 expr
= oberon_new_operator(OP_LSH
, arg1
-> result
, arg1
, arg2
);
4298 expr
= oberon_cast_expr(ctx
, expr
, t
);
4304 static oberon_expr_t
*
4305 oberon_make_rot_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4309 oberon_error(ctx
, "too few arguments");
4314 oberon_error(ctx
, "too mach arguments");
4317 oberon_expr_t
* arg1
;
4319 oberon_check_src(ctx
, arg1
);
4321 oberon_type_t
* t
= arg1
-> result
;
4322 if(!oberon_is_integer_type(t
)
4323 && !oberon_is_char_type(t
)
4324 && !oberon_is_system_byte_type(t
))
4326 oberon_error(ctx
, "expected integer, char, or SYSTEM.BYTE");
4329 oberon_expr_t
* arg2
;
4330 arg2
= list_args
-> next
;
4331 oberon_check_src(ctx
, arg2
);
4332 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4334 oberon_error(ctx
, "expected integer");
4337 oberon_expr_t
* expr
;
4338 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4340 uint64_t x
= arg1
-> item
.integer
;
4341 int64_t y
= arg2
-> item
.integer
;
4346 v
= (x
<< y
) | (x
>> (64 - y
));
4351 v
= (x
>> y
) | (x
<< (64 - y
));
4354 if(oberon_is_integer_type(t
))
4356 expr
= oberon_make_integer(ctx
, v
);
4358 else if(oberon_is_char_type(t
))
4360 expr
= oberon_make_char(ctx
, v
);
4364 expr
= oberon_make_system_byte(ctx
, v
);
4369 expr
= oberon_new_operator(OP_ROT
, arg1
-> result
, arg1
, arg2
);
4370 expr
= oberon_cast_expr(ctx
, expr
, t
);
4376 static oberon_expr_t
*
4377 oberon_make_cap_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4381 oberon_error(ctx
, "too few arguments");
4386 oberon_error(ctx
, "too mach arguments");
4389 oberon_expr_t
* arg
;
4391 oberon_check_src(ctx
, arg
);
4393 if(!oberon_is_char_type(arg
-> result
))
4395 oberon_error(ctx
, "expected char");
4398 oberon_expr_t
* expr
;
4399 if(oberon_is_const(arg
))
4401 expr
= oberon_make_char(ctx
, toupper(arg
-> item
.integer
));
4405 expr
= oberon_new_operator(OP_CAP
, arg
-> result
, arg
, NULL
);
4411 static oberon_expr_t
*
4412 oberon_make_chr_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4416 oberon_error(ctx
, "too few arguments");
4421 oberon_error(ctx
, "too mach arguments");
4424 oberon_expr_t
* arg
;
4426 oberon_check_src(ctx
, arg
);
4428 if(!oberon_is_integer_type(arg
-> result
))
4430 oberon_error(ctx
, "expected integer");
4433 oberon_expr_t
* expr
;
4434 if(oberon_is_const(arg
))
4436 expr
= oberon_make_char(ctx
, arg
-> item
.integer
);
4440 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> char_type
);
4445 static oberon_expr_t
*
4446 oberon_make_ord_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4450 oberon_error(ctx
, "too few arguments");
4455 oberon_error(ctx
, "too mach arguments");
4458 oberon_expr_t
* arg
;
4460 oberon_check_src(ctx
, arg
);
4462 if(!oberon_is_char_type(arg
-> result
) && !oberon_is_string_of_one(arg
))
4464 oberon_error(ctx
, "expected char");
4467 oberon_expr_t
* expr
;
4468 if(oberon_is_const(arg
))
4470 expr
= oberon_make_integer(ctx
, arg
-> item
.integer
);
4474 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> int_type
);
4479 static oberon_expr_t
*
4480 oberon_make_entier_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4484 oberon_error(ctx
, "too few arguments");
4489 oberon_error(ctx
, "too mach arguments");
4492 oberon_expr_t
* arg
;
4494 oberon_check_src(ctx
, arg
);
4496 if(!oberon_is_real_type(arg
-> result
))
4498 oberon_error(ctx
, "expected real");
4501 oberon_expr_t
* expr
;
4502 if(oberon_is_const(arg
))
4504 expr
= oberon_make_integer(ctx
, floor(arg
-> item
.real
));
4508 expr
= oberon_new_operator(OP_ENTIER
, ctx
-> int_type
, arg
, NULL
);
4513 static oberon_expr_t
*
4514 oberon_make_odd_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4518 oberon_error(ctx
, "too few arguments");
4523 oberon_error(ctx
, "too mach arguments");
4526 oberon_expr_t
* arg
;
4528 oberon_check_src(ctx
, arg
);
4530 if(!oberon_is_integer_type(arg
-> result
))
4532 oberon_error(ctx
, "expected integer");
4535 oberon_expr_t
* expr
;
4536 expr
= oberon_make_bin_op(ctx
, MOD
, arg
, oberon_make_integer(ctx
, 2));
4537 expr
= oberon_make_bin_op(ctx
, EQUAL
, expr
, oberon_make_integer(ctx
, 1));
4541 static oberon_expr_t
*
4542 oberon_make_cc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4546 oberon_error(ctx
, "too few arguments");
4551 oberon_error(ctx
, "too mach arguments");
4554 oberon_expr_t
* arg
;
4556 oberon_check_src(ctx
, arg
);
4557 oberon_check_const(ctx
, arg
);
4559 if(!oberon_is_integer_type(arg
-> result
))
4561 oberon_error(ctx
, "expected integer");
4564 /* n >= 0 && n <= 15 */
4566 oberon_expr_t
* cond1
;
4567 oberon_expr_t
* cond2
;
4568 cond1
= oberon_make_bin_op(ctx
, GEQ
, arg
, oberon_make_integer(ctx
, 0));
4569 cond2
= oberon_make_bin_op(ctx
, LEQ
, arg
, oberon_make_integer(ctx
, 15));
4570 return oberon_make_bin_op(ctx
, AND
, cond1
, cond2
);
4573 static oberon_expr_t
*
4574 oberon_make_short_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4578 oberon_error(ctx
, "too few arguments");
4583 oberon_error(ctx
, "too mach arguments");
4586 oberon_expr_t
* arg
;
4588 oberon_check_src(ctx
, arg
);
4590 if(arg
-> result
-> shorter
== NULL
)
4592 oberon_error(ctx
, "already shorter");
4595 oberon_expr_t
* expr
;
4596 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> shorter
);
4600 static oberon_expr_t
*
4601 oberon_make_long_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4605 oberon_error(ctx
, "too few arguments");
4610 oberon_error(ctx
, "too mach arguments");
4613 oberon_expr_t
* arg
;
4615 oberon_check_src(ctx
, arg
);
4617 if(arg
-> result
-> longer
== NULL
)
4619 oberon_error(ctx
, "already longer");
4622 oberon_expr_t
* expr
;
4623 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> longer
);
4627 static oberon_expr_t
*
4628 oberon_make_val_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4632 oberon_error(ctx
, "too few arguments");
4637 oberon_error(ctx
, "too mach arguments");
4640 oberon_expr_t
* typ
;
4642 if(!oberon_is_type_expr(typ
))
4644 oberon_error(ctx
, "requires type");
4647 oberon_expr_t
* arg
;
4648 arg
= list_args
-> next
;
4649 oberon_check_src(ctx
, arg
);
4651 oberon_expr_t
* expr
;
4652 expr
= oberon_hard_cast_expr(ctx
, arg
, typ
-> result
);
4656 static oberon_expr_t
*
4657 oberon_make_len_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4661 oberon_error(ctx
, "too few arguments");
4666 oberon_error(ctx
, "too mach arguments");
4671 oberon_check_src(ctx
, v
);
4673 if(!oberon_is_array_type(v
-> result
))
4675 oberon_error(ctx
, "expected array");
4681 oberon_expr_t
* num
;
4682 num
= list_args
-> next
;
4683 oberon_check_src(ctx
, num
);
4685 if(!oberon_is_integer_type(num
-> result
))
4687 oberon_error(ctx
, "expected integer");
4689 oberon_check_const(ctx
, num
);
4691 n
= num
-> item
.integer
;
4695 oberon_type_t
* arr
= v
-> result
;
4696 while(arr
-> class == OBERON_TYPE_ARRAY
)
4702 if(n
< 0 || n
> dim
)
4704 oberon_error(ctx
, "not in range 0..%i", dim
- 1);
4707 assert(v
-> is_item
);
4709 oberon_expr_t
* expr
;
4710 expr
= oberon_new_item(MODE_LEN
, ctx
-> int_type
, true);
4711 expr
-> item
.parent
= (oberon_item_t
*) v
;
4712 expr
-> item
.integer
= n
;
4717 oberon_new_const(oberon_context_t
* ctx
, char * name
, oberon_expr_t
* expr
)
4719 oberon_object_t
* constant
;
4720 constant
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_CONST
, true, false, false);
4721 oberon_check_const(ctx
, expr
);
4722 constant
-> value
= (oberon_item_t
*) expr
;
4726 register_default_types(oberon_context_t
* ctx
)
4728 ctx
-> notype_type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
4729 oberon_generator_init_type(ctx
, ctx
-> notype_type
);
4731 ctx
-> nil_type
= oberon_new_type_ptr(OBERON_TYPE_NIL
);
4732 oberon_generator_init_type(ctx
, ctx
-> nil_type
);
4734 ctx
-> string_type
= oberon_new_type_string(1);
4735 oberon_generator_init_type(ctx
, ctx
-> string_type
);
4737 ctx
-> bool_type
= oberon_new_type_boolean();
4738 oberon_generator_init_type(ctx
, ctx
-> bool_type
);
4740 ctx
-> char_type
= oberon_new_type_char(1);
4741 oberon_generator_init_type(ctx
, ctx
-> char_type
);
4743 ctx
-> byte_type
= oberon_new_type_integer(1);
4744 oberon_generator_init_type(ctx
, ctx
-> byte_type
);
4746 ctx
-> shortint_type
= oberon_new_type_integer(2);
4747 oberon_generator_init_type(ctx
, ctx
-> shortint_type
);
4749 ctx
-> int_type
= oberon_new_type_integer(4);
4750 oberon_generator_init_type(ctx
, ctx
-> int_type
);
4752 ctx
-> longint_type
= oberon_new_type_integer(8);
4753 oberon_generator_init_type(ctx
, ctx
-> longint_type
);
4755 ctx
-> real_type
= oberon_new_type_real(4);
4756 oberon_generator_init_type(ctx
, ctx
-> real_type
);
4758 ctx
-> longreal_type
= oberon_new_type_real(8);
4759 oberon_generator_init_type(ctx
, ctx
-> longreal_type
);
4761 ctx
-> set_type
= oberon_new_type_set(4);
4762 oberon_generator_init_type(ctx
, ctx
-> set_type
);
4764 ctx
-> system_byte_type
= oberon_new_type_ptr(OBERON_TYPE_SYSTEM_BYTE
);
4765 oberon_generator_init_type(ctx
, ctx
-> system_byte_type
);
4767 ctx
-> system_ptr_type
= oberon_new_type_ptr(OBERON_TYPE_SYSTEM_PTR
);
4768 oberon_generator_init_type(ctx
, ctx
-> system_ptr_type
);
4770 /* LONG / SHORT support */
4771 ctx
-> byte_type
-> shorter
= NULL
;
4772 ctx
-> byte_type
-> longer
= ctx
-> shortint_type
;
4774 ctx
-> shortint_type
-> shorter
= ctx
-> byte_type
;
4775 ctx
-> shortint_type
-> longer
= ctx
-> int_type
;
4777 ctx
-> int_type
-> shorter
= ctx
-> shortint_type
;
4778 ctx
-> int_type
-> longer
= ctx
-> longint_type
;
4780 ctx
-> longint_type
-> shorter
= ctx
-> int_type
;
4781 ctx
-> longint_type
-> longer
= NULL
;
4783 ctx
-> real_type
-> shorter
= NULL
;
4784 ctx
-> real_type
-> longer
= ctx
-> longreal_type
;
4786 ctx
-> longreal_type
-> shorter
= ctx
-> real_type
;
4787 ctx
-> longreal_type
-> longer
= NULL
;
4791 oberon_new_intrinsic(oberon_context_t
* ctx
, char * name
, GenerateFuncCallback f
, GenerateProcCallback p
)
4793 oberon_object_t
* proc
;
4794 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, true, false, false);
4795 proc
-> type
= oberon_new_type_ptr(OBERON_TYPE_PROCEDURE
);
4796 proc
-> type
-> sysproc
= true;
4797 proc
-> type
-> genfunc
= f
;
4798 proc
-> type
-> genproc
= p
;
4801 static void oberon_new_intrinsic_type(oberon_context_t
* ctx
, char * name
, oberon_type_t
* type
)
4803 oberon_object_t
* id
;
4804 id
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, true, false, false);
4809 oberon_begin_intrinsic_module(oberon_context_t
* ctx
, char * name
, oberon_module_t
** m
)
4811 oberon_scope_t
* module_scope
;
4812 module_scope
= oberon_open_scope(ctx
);
4814 oberon_module_t
* module
;
4815 module
= GC_MALLOC(sizeof *module
);
4816 memset(module
, 0, sizeof *module
);
4817 module
-> name
= name
;
4818 module
-> intrinsic
= true;
4819 module
-> decl
= module_scope
;
4820 module
-> next
= ctx
-> module_list
;
4822 ctx
-> mod
= module
;
4823 ctx
-> module_list
= module
;
4829 oberon_end_intrinsic_module(oberon_context_t
* ctx
, oberon_module_t
* m
)
4831 oberon_close_scope(m
-> decl
);
4837 oberon_create_context(ModuleImportCallback import_module
)
4839 oberon_context_t
* ctx
= GC_MALLOC(sizeof *ctx
);
4840 memset(ctx
, 0, sizeof *ctx
);
4842 oberon_scope_t
* world_scope
;
4843 world_scope
= oberon_open_scope(ctx
);
4844 ctx
-> world_scope
= world_scope
;
4846 ctx
-> import_module
= import_module
;
4848 oberon_generator_init_context(ctx
);
4851 register_default_types(ctx
);
4854 oberon_new_const(ctx
, "TRUE", oberon_make_boolean(ctx
, true));
4855 oberon_new_const(ctx
, "FALSE", oberon_make_boolean(ctx
, false));
4858 oberon_new_intrinsic_type(ctx
, "BOOLEAN", ctx
-> bool_type
);
4859 oberon_new_intrinsic_type(ctx
, "CHAR", ctx
-> char_type
);
4860 oberon_new_intrinsic_type(ctx
, "SHORTINT", ctx
-> byte_type
);
4861 oberon_new_intrinsic_type(ctx
, "INTEGER", ctx
-> shortint_type
);
4862 oberon_new_intrinsic_type(ctx
, "LONGINT", ctx
-> int_type
);
4863 oberon_new_intrinsic_type(ctx
, "HUGEINT", ctx
-> longint_type
);
4864 oberon_new_intrinsic_type(ctx
, "REAL", ctx
-> real_type
);
4865 oberon_new_intrinsic_type(ctx
, "LONGREAL", ctx
-> longreal_type
);
4866 oberon_new_intrinsic_type(ctx
, "SET", ctx
-> set_type
);
4869 oberon_new_intrinsic(ctx
, "ABS", oberon_make_abs_call
, NULL
);
4870 oberon_new_intrinsic(ctx
, "ASH", oberon_make_ash_call
, NULL
);
4871 oberon_new_intrinsic(ctx
, "CAP", oberon_make_cap_call
, NULL
);
4872 oberon_new_intrinsic(ctx
, "CHR", oberon_make_chr_call
, NULL
);
4873 oberon_new_intrinsic(ctx
, "ENTIER", oberon_make_entier_call
, NULL
);
4874 oberon_new_intrinsic(ctx
, "LEN", oberon_make_len_call
, NULL
);
4875 oberon_new_intrinsic(ctx
, "LONG", oberon_make_long_call
, NULL
);
4876 oberon_new_intrinsic(ctx
, "MAX", oberon_make_max_call
, NULL
);
4877 oberon_new_intrinsic(ctx
, "MIN", oberon_make_min_call
, NULL
);
4878 oberon_new_intrinsic(ctx
, "ODD", oberon_make_odd_call
, NULL
);
4879 oberon_new_intrinsic(ctx
, "ORD", oberon_make_ord_call
, NULL
);
4880 oberon_new_intrinsic(ctx
, "SHORT", oberon_make_short_call
, NULL
);
4881 oberon_new_intrinsic(ctx
, "SIZE", oberon_make_size_call
, NULL
);
4884 oberon_new_intrinsic(ctx
, "ASSERT", NULL
, oberon_make_assert_call
);
4885 oberon_new_intrinsic(ctx
, "COPY", NULL
, oberon_make_copy_call
);
4886 oberon_new_intrinsic(ctx
, "DEC", NULL
, oberon_make_dec_call
);
4887 oberon_new_intrinsic(ctx
, "EXCL", NULL
, oberon_make_excl_call
);
4888 oberon_new_intrinsic(ctx
, "HALT", NULL
, oberon_make_halt_call
);
4889 oberon_new_intrinsic(ctx
, "INC", NULL
, oberon_make_inc_call
);
4890 oberon_new_intrinsic(ctx
, "INCL", NULL
, oberon_make_incl_call
);
4891 oberon_new_intrinsic(ctx
, "NEW", NULL
, oberon_make_new_call
);
4894 oberon_begin_intrinsic_module(ctx
, "SYSTEM", &ctx
-> system_module
);
4897 oberon_new_intrinsic_type(ctx
, "BYTE", ctx
-> system_byte_type
);
4898 oberon_new_intrinsic_type(ctx
, "PTR", ctx
-> system_ptr_type
);
4901 oberon_new_intrinsic(ctx
, "CC", oberon_make_cc_call
, NULL
);
4902 oberon_new_intrinsic(ctx
, "LSH", oberon_make_lsh_call
, NULL
);
4903 oberon_new_intrinsic(ctx
, "ROT", oberon_make_rot_call
, NULL
);
4904 oberon_new_intrinsic(ctx
, "VAL", oberon_make_val_call
, NULL
);
4906 oberon_end_intrinsic_module(ctx
, ctx
-> system_module
);
4912 oberon_destroy_context(oberon_context_t
* ctx
)
4914 oberon_generator_destroy_context(ctx
);
4918 oberon_compile_module(oberon_context_t
* ctx
, oberon_scanner_t
* s
)
4920 const char * code
= ctx
-> code
;
4921 int code_index
= ctx
-> code_index
;
4922 oberon_location_t loc
= ctx
-> loc
;
4923 oberon_location_t xloc
= ctx
-> xloc
;
4925 int token
= ctx
-> token
;
4926 char * string
= ctx
-> string
;
4927 int integer
= ctx
-> integer
;
4928 int real
= ctx
-> real
;
4929 bool longmode
= ctx
-> longmode
;
4930 oberon_scope_t
* decl
= ctx
-> decl
;
4931 oberon_module_t
* mod
= ctx
-> mod
;
4933 oberon_scope_t
* module_scope
;
4934 module_scope
= oberon_open_scope(ctx
);
4936 oberon_module_t
* module
;
4937 module
= GC_MALLOC(sizeof *module
);
4938 memset(module
, 0, sizeof *module
);
4939 module
-> decl
= module_scope
;
4940 module
-> next
= ctx
-> module_list
;
4942 ctx
-> mod
= module
;
4943 ctx
-> module_list
= module
;
4945 oberon_init_scaner(ctx
, s
);
4946 oberon_parse_module(ctx
);
4948 module
-> ready
= 1;
4951 ctx
-> code_index
= code_index
;
4955 ctx
-> token
= token
;
4956 ctx
-> string
= string
;
4957 ctx
-> integer
= integer
;
4959 ctx
-> longmode
= longmode
;