13 #include "../include/oberon.h"
15 #include "oberon-internals.h"
16 #include "oberon-type-compat.h"
17 #include "oberon-common.h"
18 #include "generator.h"
20 // =======================================================================
22 // =======================================================================
25 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
);
27 static oberon_type_t
*
28 oberon_new_type_ptr(int class)
30 oberon_type_t
* x
= GC_MALLOC(sizeof *x
);
31 memset(x
, 0, sizeof *x
);
36 static oberon_type_t
*
37 oberon_new_type_integer(int size
)
40 x
= oberon_new_type_ptr(OBERON_TYPE_INTEGER
);
45 static oberon_type_t
*
46 oberon_new_type_boolean()
49 x
= oberon_new_type_ptr(OBERON_TYPE_BOOLEAN
);
53 static oberon_type_t
*
54 oberon_new_type_real(int size
)
57 x
= oberon_new_type_ptr(OBERON_TYPE_REAL
);
62 static oberon_type_t
*
63 oberon_new_type_char(int size
)
66 x
= oberon_new_type_ptr(OBERON_TYPE_CHAR
);
71 static oberon_type_t
*
72 oberon_new_type_string(int size
)
75 x
= oberon_new_type_ptr(OBERON_TYPE_STRING
);
80 static oberon_type_t
*
81 oberon_new_type_set(int size
)
84 x
= oberon_new_type_ptr(OBERON_TYPE_SET
);
89 static oberon_expr_t
*
90 oberon_new_operator(int op
, oberon_type_t
* result
, oberon_expr_t
* left
, oberon_expr_t
* right
)
92 oberon_oper_t
* operator;
93 operator = GC_MALLOC(sizeof *operator);
94 memset(operator, 0, sizeof *operator);
96 operator -> is_item
= 0;
97 operator -> result
= result
;
98 operator -> read_only
= 1;
100 operator -> left
= left
;
101 operator -> right
= right
;
103 return (oberon_expr_t
*) operator;
106 static oberon_expr_t
*
107 oberon_new_item(int mode
, oberon_type_t
* result
, int read_only
)
109 oberon_item_t
* item
;
110 item
= GC_MALLOC(sizeof *item
);
111 memset(item
, 0, sizeof *item
);
114 item
-> result
= result
;
115 item
-> read_only
= read_only
;
118 return (oberon_expr_t
*)item
;
121 static oberon_type_t
*
122 oberon_get_type_of_int_value(oberon_context_t
* ctx
, int64_t i
)
124 if(i
>= -128 && i
<= 127)
126 return ctx
-> byte_type
;
128 else if(i
>= -32768 && i
<= 32767)
130 return ctx
-> shortint_type
;
132 else if(i
>= -2147483648 && i
<= 2147483647)
134 return ctx
-> int_type
;
138 return ctx
-> longint_type
;
142 static oberon_expr_t
*
143 oberon_make_integer(oberon_context_t
* ctx
, int64_t i
)
145 oberon_expr_t
* expr
;
146 oberon_type_t
* result
;
147 result
= oberon_get_type_of_int_value(ctx
, i
);
148 expr
= oberon_new_item(MODE_INTEGER
, result
, true);
149 expr
-> item
.integer
= i
;
150 expr
-> item
.real
= i
;
154 static oberon_expr_t
*
155 oberon_make_char(oberon_context_t
* ctx
, int64_t i
)
157 oberon_expr_t
* expr
;
158 expr
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
159 expr
-> item
.integer
= i
;
160 expr
-> item
.real
= i
;
164 static oberon_expr_t
*
165 oberon_make_real_typed(oberon_context_t
* ctx
, double r
, oberon_type_t
* result
)
167 oberon_expr_t
* expr
;
168 expr
= oberon_new_item(MODE_REAL
, result
, true);
169 expr
-> item
.integer
= r
;
170 expr
-> item
.real
= r
;
174 static oberon_expr_t
*
175 oberon_make_real(oberon_context_t
* ctx
, double r
, bool longmode
)
177 oberon_type_t
* result
;
178 result
= (longmode
) ? (ctx
-> longreal_type
) : (ctx
-> real_type
);
179 return oberon_make_real_typed(ctx
, r
, result
);
182 static oberon_expr_t
*
183 oberon_make_boolean(oberon_context_t
* ctx
, bool cond
)
185 oberon_expr_t
* expr
;
186 expr
= oberon_new_item(MODE_BOOLEAN
, ctx
-> bool_type
, true);
187 expr
-> item
.integer
= cond
;
188 expr
-> item
.real
= cond
;
192 static oberon_expr_t
*
193 oberon_make_set(oberon_context_t
* ctx
, int64_t i
)
195 oberon_expr_t
* expr
;
196 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
197 expr
-> item
.integer
= i
;
198 expr
-> item
.real
= i
;
202 static oberon_expr_t
*
203 oberon_make_set_index(oberon_context_t
* ctx
, int64_t i
)
205 oberon_expr_t
* expr
;
206 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
207 expr
-> item
.integer
= 1 << i
;
208 expr
-> item
.real
= 1 << i
;
212 static oberon_expr_t
*
213 oberon_make_set_range(oberon_context_t
* ctx
, int64_t x
, int64_t y
)
215 oberon_expr_t
* expr
;
216 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
217 expr
-> item
.integer
= (x
<= y
) ? ((2 << y
) - (1 << x
)) : (0);
218 expr
-> item
.real
= expr
-> item
.integer
;
222 // =======================================================================
224 // =======================================================================
226 static oberon_scope_t
*
227 oberon_open_scope(oberon_context_t
* ctx
)
229 oberon_scope_t
* scope
= GC_MALLOC(sizeof *scope
);
230 memset(scope
, 0, sizeof *scope
);
232 oberon_object_t
* list
= GC_MALLOC(sizeof *list
);
233 memset(list
, 0, sizeof *list
);
236 scope
-> list
= list
;
237 scope
-> up
= ctx
-> decl
;
241 scope
-> local
= scope
-> up
-> local
;
242 scope
-> parent
= scope
-> up
-> parent
;
243 scope
-> parent_type
= scope
-> up
-> parent_type
;
244 scope
-> exit_label
= scope
-> up
-> exit_label
;
252 oberon_close_scope(oberon_scope_t
* scope
)
254 oberon_context_t
* ctx
= scope
-> ctx
;
255 ctx
-> decl
= scope
-> up
;
258 static oberon_object_t
*
259 oberon_find_object_in_list(oberon_object_t
* list
, char * name
)
261 oberon_object_t
* x
= list
;
262 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
264 printf("inlist: '%s' != '%s'\n", x
-> next
-> name
, name
);
270 static oberon_object_t
*
271 oberon_find_object(oberon_scope_t
* scope
, char * name
, bool check_it
)
273 oberon_object_t
* result
= NULL
;
275 oberon_scope_t
* s
= scope
;
276 while(result
== NULL
&& s
!= NULL
)
278 result
= oberon_find_object_in_list(s
-> list
, name
);
282 if(check_it
&& result
== NULL
)
284 oberon_error(scope
-> ctx
, "undefined ident %s", name
);
290 static oberon_object_t
*
291 oberon_create_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
)
293 printf("oberon_create_object: '%s'\n", name
);
294 oberon_object_t
* newvar
= GC_MALLOC(sizeof *newvar
);
295 memset(newvar
, 0, sizeof *newvar
);
296 newvar
-> name
= name
;
297 newvar
-> class = class;
298 newvar
-> export
= export
;
299 newvar
-> read_only
= read_only
;
300 newvar
-> local
= scope
-> local
;
301 newvar
-> parent
= scope
-> parent
;
302 newvar
-> parent_type
= scope
-> parent_type
;
303 newvar
-> module
= scope
-> ctx
-> mod
;
307 static oberon_object_t
*
308 oberon_define_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
, bool check_upscope
)
312 if(oberon_find_object(scope
-> up
, name
, false))
314 oberon_error(scope
-> ctx
, "already defined");
318 oberon_object_t
* x
= scope
-> list
;
319 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
321 printf("inlist: '%s' != '%s'\n", x
-> next
-> name
, name
);
327 oberon_error(scope
-> ctx
, "already defined");
330 oberon_object_t
* newvar
;
331 newvar
= oberon_create_object(scope
, name
, class, export
, read_only
);
337 static oberon_object_t
*
338 oberon_define_type(oberon_scope_t
* scope
, char * name
, oberon_type_t
* type
, int export
)
340 oberon_object_t
* id
;
341 id
= oberon_define_object(scope
, name
, OBERON_CLASS_TYPE
, export
, false, false);
343 oberon_generator_init_type(scope
-> ctx
, type
);
347 // =======================================================================
349 // =======================================================================
352 oberon_get_char(oberon_context_t
* ctx
)
354 if(ctx
-> code
[ctx
-> code_index
])
356 ctx
-> code_index
+= 1;
357 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
362 oberon_init_scaner(oberon_context_t
* ctx
, const char * code
)
365 ctx
-> code_index
= 0;
366 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
370 oberon_read_ident(oberon_context_t
* ctx
)
373 int i
= ctx
-> code_index
;
375 int c
= ctx
-> code
[i
];
383 char * ident
= GC_MALLOC(len
+ 1);
384 memcpy(ident
, &ctx
->code
[ctx
->code_index
], len
);
387 ctx
-> code_index
= i
;
388 ctx
-> c
= ctx
-> code
[i
];
389 ctx
-> string
= ident
;
390 ctx
-> token
= IDENT
;
392 if(strcmp(ident
, "MODULE") == 0)
394 ctx
-> token
= MODULE
;
396 else if(strcmp(ident
, "END") == 0)
400 else if(strcmp(ident
, "VAR") == 0)
404 else if(strcmp(ident
, "BEGIN") == 0)
406 ctx
-> token
= BEGIN
;
408 else if(strcmp(ident
, "OR") == 0)
412 else if(strcmp(ident
, "DIV") == 0)
416 else if(strcmp(ident
, "MOD") == 0)
420 else if(strcmp(ident
, "PROCEDURE") == 0)
422 ctx
-> token
= PROCEDURE
;
424 else if(strcmp(ident
, "RETURN") == 0)
426 ctx
-> token
= RETURN
;
428 else if(strcmp(ident
, "CONST") == 0)
430 ctx
-> token
= CONST
;
432 else if(strcmp(ident
, "TYPE") == 0)
436 else if(strcmp(ident
, "ARRAY") == 0)
438 ctx
-> token
= ARRAY
;
440 else if(strcmp(ident
, "OF") == 0)
444 else if(strcmp(ident
, "RECORD") == 0)
446 ctx
-> token
= RECORD
;
448 else if(strcmp(ident
, "POINTER") == 0)
450 ctx
-> token
= POINTER
;
452 else if(strcmp(ident
, "TO") == 0)
456 else if(strcmp(ident
, "NIL") == 0)
460 else if(strcmp(ident
, "IMPORT") == 0)
462 ctx
-> token
= IMPORT
;
464 else if(strcmp(ident
, "IN") == 0)
468 else if(strcmp(ident
, "IS") == 0)
472 else if(strcmp(ident
, "IF") == 0)
476 else if(strcmp(ident
, "THEN") == 0)
480 else if(strcmp(ident
, "ELSE") == 0)
484 else if(strcmp(ident
, "ELSIF") == 0)
486 ctx
-> token
= ELSIF
;
488 else if(strcmp(ident
, "WHILE") == 0)
490 ctx
-> token
= WHILE
;
492 else if(strcmp(ident
, "DO") == 0)
496 else if(strcmp(ident
, "REPEAT") == 0)
498 ctx
-> token
= REPEAT
;
500 else if(strcmp(ident
, "UNTIL") == 0)
502 ctx
-> token
= UNTIL
;
504 else if(strcmp(ident
, "FOR") == 0)
508 else if(strcmp(ident
, "BY") == 0)
512 else if(strcmp(ident
, "LOOP") == 0)
516 else if(strcmp(ident
, "EXIT") == 0)
520 else if(strcmp(ident
, "CASE") == 0)
524 else if(strcmp(ident
, "WITH") == 0)
530 #define ISHEXDIGIT(x) \
531 (((x) >= '0' && (x) <= '9') || ((x) >= 'A' && (x) <= 'F'))
534 oberon_read_number(oberon_context_t
* ctx
)
547 * mode = 3 == LONGREAL
551 start_i
= ctx
-> code_index
;
553 while(isdigit(ctx
-> c
))
555 oberon_get_char(ctx
);
558 end_i
= ctx
-> code_index
;
560 if(ISHEXDIGIT(ctx
-> c
))
563 while(ISHEXDIGIT(ctx
-> c
))
565 oberon_get_char(ctx
);
568 end_i
= ctx
-> code_index
;
573 oberon_get_char(ctx
);
575 else if(ctx
-> c
== 'X')
578 oberon_get_char(ctx
);
582 oberon_error(ctx
, "invalid hex number");
585 else if(ctx
-> c
== '.')
587 oberon_get_char(ctx
);
590 /* Чит: избегаем конфликта с DOTDOT */
591 ctx
-> code_index
-= 1;
597 while(isdigit(ctx
-> c
))
599 oberon_get_char(ctx
);
602 if(ctx
-> c
== 'E' || ctx
-> c
== 'D')
604 exp_i
= ctx
-> code_index
;
611 oberon_get_char(ctx
);
613 if(ctx
-> c
== '+' || ctx
-> c
== '-')
615 oberon_get_char(ctx
);
618 while(isdigit(ctx
-> c
))
620 oberon_get_char(ctx
);
624 end_i
= ctx
-> code_index
;
632 oberon_get_char(ctx
);
634 else if(ctx
-> c
== 'X')
637 oberon_get_char(ctx
);
641 int len
= end_i
- start_i
;
642 ident
= GC_MALLOC(len
+ 1);
643 memcpy(ident
, &ctx
-> code
[start_i
], len
);
646 ctx
-> longmode
= false;
649 int i
= exp_i
- start_i
;
651 ctx
-> longmode
= true;
657 integer
= atol(ident
);
659 ctx
-> token
= INTEGER
;
662 sscanf(ident
, "%lx", &integer
);
664 ctx
-> token
= INTEGER
;
668 sscanf(ident
, "%lf", &real
);
673 sscanf(ident
, "%lx", &integer
);
678 oberon_error(ctx
, "oberon_read_number: wat");
682 ctx
-> string
= ident
;
683 ctx
-> integer
= integer
;
688 oberon_skip_space(oberon_context_t
* ctx
)
690 while(isspace(ctx
-> c
))
692 oberon_get_char(ctx
);
697 oberon_read_comment(oberon_context_t
* ctx
)
704 oberon_get_char(ctx
);
707 oberon_get_char(ctx
);
711 else if(ctx
-> c
== '*')
713 oberon_get_char(ctx
);
716 oberon_get_char(ctx
);
720 else if(ctx
-> c
== 0)
722 oberon_error(ctx
, "unterminated comment");
726 oberon_get_char(ctx
);
731 static void oberon_read_string(oberon_context_t
* ctx
)
734 oberon_get_char(ctx
);
736 int start
= ctx
-> code_index
;
738 while(ctx
-> c
!= 0 && ctx
-> c
!= c
)
740 oberon_get_char(ctx
);
745 oberon_error(ctx
, "unterminated string");
748 int end
= ctx
-> code_index
;
750 oberon_get_char(ctx
);
752 char * string
= GC_MALLOC(end
- start
+ 1);
753 strncpy(string
, &ctx
-> code
[start
], end
- start
);
756 ctx
-> token
= STRING
;
757 ctx
-> string
= string
;
758 ctx
-> integer
= string
[0];
761 static void oberon_read_token(oberon_context_t
* ctx
);
764 oberon_read_symbol(oberon_context_t
* ctx
)
773 ctx
-> token
= SEMICOLON
;
774 oberon_get_char(ctx
);
777 ctx
-> token
= COLON
;
778 oberon_get_char(ctx
);
781 ctx
-> token
= ASSIGN
;
782 oberon_get_char(ctx
);
787 oberon_get_char(ctx
);
790 ctx
-> token
= DOTDOT
;
791 oberon_get_char(ctx
);
795 ctx
-> token
= LPAREN
;
796 oberon_get_char(ctx
);
799 oberon_get_char(ctx
);
800 oberon_read_comment(ctx
);
801 oberon_read_token(ctx
);
805 ctx
-> token
= RPAREN
;
806 oberon_get_char(ctx
);
809 ctx
-> token
= EQUAL
;
810 oberon_get_char(ctx
);
814 oberon_get_char(ctx
);
818 oberon_get_char(ctx
);
822 oberon_get_char(ctx
);
826 ctx
-> token
= GREAT
;
827 oberon_get_char(ctx
);
831 oberon_get_char(ctx
);
836 oberon_get_char(ctx
);
839 ctx
-> token
= MINUS
;
840 oberon_get_char(ctx
);
844 oberon_get_char(ctx
);
847 oberon_get_char(ctx
);
848 oberon_error(ctx
, "unstarted comment");
852 ctx
-> token
= SLASH
;
853 oberon_get_char(ctx
);
857 oberon_get_char(ctx
);
861 oberon_get_char(ctx
);
864 ctx
-> token
= COMMA
;
865 oberon_get_char(ctx
);
868 ctx
-> token
= LBRACK
;
869 oberon_get_char(ctx
);
872 ctx
-> token
= RBRACK
;
873 oberon_get_char(ctx
);
876 ctx
-> token
= UPARROW
;
877 oberon_get_char(ctx
);
880 oberon_read_string(ctx
);
883 oberon_read_string(ctx
);
886 ctx
-> token
= LBRACE
;
887 oberon_get_char(ctx
);
890 ctx
-> token
= RBRACE
;
891 oberon_get_char(ctx
);
895 oberon_get_char(ctx
);
898 oberon_error(ctx
, "invalid char %c", ctx
-> c
);
904 oberon_read_token(oberon_context_t
* ctx
)
906 oberon_skip_space(ctx
);
911 oberon_read_ident(ctx
);
915 oberon_read_number(ctx
);
919 oberon_read_symbol(ctx
);
923 // =======================================================================
925 // =======================================================================
927 static void oberon_expect_token(oberon_context_t
* ctx
, int token
);
928 static oberon_expr_t
* oberon_expr(oberon_context_t
* ctx
);
929 static void oberon_assert_token(oberon_context_t
* ctx
, int token
);
930 static char * oberon_assert_ident(oberon_context_t
* ctx
);
931 static void oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
);
932 static oberon_item_t
* oberon_const_expr(oberon_context_t
* ctx
);
933 static oberon_expr_t
* oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
);
934 static bool oberon_is_const(oberon_expr_t
* expr
);
936 static oberon_expr_t
*
937 oberon_make_unary_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
)
939 oberon_expr_t
* expr
;
940 oberon_type_t
* result
;
942 result
= a
-> result
;
946 if(result
-> class == OBERON_TYPE_SET
)
948 if(oberon_is_const(a
))
950 expr
= oberon_make_set(ctx
, ~(a
-> item
.integer
));
954 expr
= oberon_new_operator(OP_COMPLEMENTATION
, result
, a
, NULL
);
957 else if(result
-> class == OBERON_TYPE_INTEGER
)
959 if(oberon_is_const(a
))
961 expr
= oberon_make_integer(ctx
, -(a
-> item
.integer
));
965 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
968 else if(result
-> class == OBERON_TYPE_REAL
)
970 if(oberon_is_const(a
))
972 expr
= oberon_make_real_typed(ctx
, -(a
-> item
.real
), result
);
976 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
981 oberon_error(ctx
, "incompatible operator type");
984 else if(token
== NOT
)
986 if(result
-> class != OBERON_TYPE_BOOLEAN
)
988 oberon_error(ctx
, "incompatible operator type");
991 if(oberon_is_const(a
))
993 expr
= oberon_make_boolean(ctx
, !(a
-> item
.integer
));
997 expr
= oberon_new_operator(OP_LOGIC_NOT
, result
, a
, NULL
);
1002 oberon_error(ctx
, "oberon_make_unary_op: wat");
1009 oberon_expr_list(oberon_context_t
* ctx
, int * num_expr
, oberon_expr_t
** first
, int const_expr
)
1011 oberon_expr_t
* last
;
1016 *first
= last
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1020 *first
= last
= oberon_expr(ctx
);
1022 while(ctx
-> token
== COMMA
)
1024 oberon_assert_token(ctx
, COMMA
);
1025 oberon_expr_t
* current
;
1029 current
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1033 current
= oberon_expr(ctx
);
1036 last
-> next
= current
;
1042 static oberon_expr_t
*
1043 oberon_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1045 oberon_expr_t
* cast
;
1047 if((oberon_is_char_type(pref
) && oberon_is_const_string(expr
) && strlen(expr
-> item
.string
) == 1))
1049 /* Автоматически преобразуем строку единичного размера в символ */
1050 cast
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
1051 cast
-> item
.integer
= expr
-> item
.string
[0];
1053 else if(!oberon_is_some_types(expr
-> result
, pref
))
1055 cast
= oberon_new_operator(OP_CAST
, pref
, expr
, NULL
);
1066 oberon_check_dst(oberon_context_t
* ctx
, oberon_expr_t
* dst
)
1068 if(dst
-> read_only
)
1070 oberon_error(ctx
, "read-only destination");
1073 if(dst
-> is_item
== false)
1075 oberon_error(ctx
, "not variable");
1078 switch(dst
-> item
.mode
)
1089 oberon_error(ctx
, "not variable");
1095 oberon_check_src(oberon_context_t
* ctx
, oberon_expr_t
* src
)
1099 if(src
-> item
.mode
== MODE_TYPE
)
1101 oberon_error(ctx
, "not variable");
1107 oberon_autocast_call(oberon_context_t
* ctx
, oberon_item_t
* desig
)
1109 if(desig
-> mode
!= MODE_CALL
)
1111 oberon_error(ctx
, "expected mode CALL");
1114 oberon_type_t
* fn
= desig
-> parent
-> result
;
1115 int num_args
= desig
-> num_args
;
1116 int num_decl
= fn
-> num_decl
;
1118 if(num_args
< num_decl
)
1120 oberon_error(ctx
, "too few arguments");
1122 else if(num_args
> num_decl
)
1124 oberon_error(ctx
, "too many arguments");
1127 /* Делаем проверку на запись и делаем автокаст */
1128 oberon_expr_t
* casted
[num_args
];
1129 oberon_expr_t
* arg
= desig
-> args
;
1130 oberon_object_t
* param
= fn
-> decl
;
1131 for(int i
= 0; i
< num_args
; i
++)
1133 if(param
-> class == OBERON_CLASS_VAR_PARAM
)
1135 oberon_check_dst(ctx
, arg
);
1136 if(!oberon_is_compatible_arrays(param
, arg
))
1138 oberon_check_compatible_var_param(ctx
, param
-> type
, arg
-> result
);
1140 casted
[i
] = oberon_cast_expr(ctx
, arg
, param
-> type
);
1144 oberon_check_src(ctx
, arg
);
1145 if(!oberon_is_compatible_arrays(param
, arg
))
1147 oberon_check_assignment_compatible(ctx
, arg
, param
-> type
);
1149 casted
[i
] = oberon_cast_expr(ctx
, arg
, param
-> type
);
1153 param
= param
-> next
;
1156 /* Создаём новый список выражений */
1160 for(int i
= 0; i
< num_args
- 1; i
++)
1162 casted
[i
] -> next
= casted
[i
+ 1];
1164 desig
-> args
= arg
;
1168 static oberon_expr_t
*
1169 oberon_make_call_func(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1171 oberon_type_t
* signature
= item
-> result
;
1172 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1174 oberon_error(ctx
, "not a procedure");
1177 oberon_expr_t
* call
;
1179 if(signature
-> sysproc
)
1181 if(signature
-> genfunc
== NULL
)
1183 oberon_error(ctx
, "not a function-procedure");
1186 call
= signature
-> genfunc(ctx
, num_args
, list_args
);
1190 if(signature
-> base
-> class == OBERON_TYPE_NOTYPE
)
1192 oberon_error(ctx
, "attempt to call procedure in expression");
1195 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1196 call
-> item
.parent
= item
;
1197 call
-> item
.num_args
= num_args
;
1198 call
-> item
.args
= list_args
;
1199 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1206 oberon_make_call_proc(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1208 oberon_type_t
* signature
= item
-> result
;
1209 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1211 oberon_error(ctx
, "not a procedure");
1214 oberon_expr_t
* call
;
1216 if(signature
-> sysproc
)
1218 if(signature
-> genproc
== NULL
)
1220 oberon_error(ctx
, "not a procedure");
1223 signature
-> genproc(ctx
, num_args
, list_args
);
1227 if(signature
-> base
-> class != OBERON_TYPE_NOTYPE
)
1229 oberon_error(ctx
, "attempt to call function as non-typed procedure");
1232 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1233 call
-> item
.parent
= item
;
1234 call
-> item
.num_args
= num_args
;
1235 call
-> item
.args
= list_args
;
1236 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1237 oberon_generate_call_proc(ctx
, call
);
1245 || ((x) == INTEGER) \
1248 || ((x) == STRING) \
1250 || ((x) == LPAREN) \
1253 static oberon_expr_t
*
1254 oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1256 if(expr
-> result
-> class != OBERON_TYPE_POINTER
)
1258 oberon_error(ctx
, "not a pointer");
1261 assert(expr
-> is_item
);
1263 oberon_expr_t
* selector
;
1264 selector
= oberon_new_item(MODE_DEREF
, expr
-> result
-> base
, false);
1265 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1270 static oberon_expr_t
*
1271 oberon_make_array_selector(oberon_context_t
* ctx
, oberon_expr_t
* desig
, oberon_expr_t
* index
)
1273 if(desig
-> result
-> class == OBERON_TYPE_POINTER
)
1275 desig
= oberno_make_dereferencing(ctx
, desig
);
1278 assert(desig
-> is_item
);
1280 if(desig
-> result
-> class != OBERON_TYPE_ARRAY
)
1282 oberon_error(ctx
, "not array");
1285 oberon_type_t
* base
;
1286 base
= desig
-> result
-> base
;
1288 if(index
-> result
-> class != OBERON_TYPE_INTEGER
)
1290 oberon_error(ctx
, "index must be integer");
1293 // Статическая проверка границ массива
1294 if(desig
-> result
-> size
!= 0)
1296 if(index
-> is_item
)
1298 if(index
-> item
.mode
== MODE_INTEGER
)
1300 int arr_size
= desig
-> result
-> size
;
1301 int index_int
= index
-> item
.integer
;
1302 if(index_int
< 0 || index_int
> arr_size
- 1)
1304 oberon_error(ctx
, "not in range (dimension size 0..%i)", arr_size
- 1);
1310 oberon_expr_t
* selector
;
1311 selector
= oberon_new_item(MODE_INDEX
, base
, desig
-> read_only
);
1312 selector
-> item
.parent
= (oberon_item_t
*) desig
;
1313 selector
-> item
.num_args
= 1;
1314 selector
-> item
.args
= index
;
1319 static oberon_expr_t
*
1320 oberon_make_record_selector(oberon_context_t
* ctx
, oberon_expr_t
* expr
, char * name
)
1322 if(expr
-> result
-> class == OBERON_TYPE_POINTER
)
1324 expr
= oberno_make_dereferencing(ctx
, expr
);
1327 assert(expr
-> is_item
);
1329 if(expr
-> result
-> class != OBERON_TYPE_RECORD
)
1331 oberon_error(ctx
, "not record");
1334 oberon_type_t
* rec
= expr
-> result
;
1336 oberon_object_t
* field
;
1337 field
= oberon_find_object(rec
-> scope
, name
, true);
1339 if(field
-> export
== 0)
1341 if(field
-> module
!= ctx
-> mod
)
1343 oberon_error(ctx
, "field not exported");
1347 int read_only
= expr
-> read_only
;
1348 if(field
-> read_only
)
1350 if(field
-> module
!= ctx
-> mod
)
1356 oberon_expr_t
* selector
;
1357 selector
= oberon_new_item(MODE_FIELD
, field
-> type
, read_only
);
1358 selector
-> item
.var
= field
;
1359 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1364 #define ISSELECTOR(x) \
1367 || ((x) == UPARROW) \
1370 static oberon_object_t
*
1371 oberon_qualident(oberon_context_t
* ctx
, char ** xname
, int check
)
1374 oberon_object_t
* x
;
1376 name
= oberon_assert_ident(ctx
);
1377 x
= oberon_find_object(ctx
-> decl
, name
, check
);
1381 if(x
-> class == OBERON_CLASS_MODULE
)
1383 oberon_assert_token(ctx
, DOT
);
1384 name
= oberon_assert_ident(ctx
);
1385 /* Наличие объектов в левых модулях всегда проверяется */
1386 x
= oberon_find_object(x
-> module
-> decl
, name
, 1);
1388 if(x
-> export
== 0)
1390 oberon_error(ctx
, "not exported");
1403 static oberon_expr_t
*
1404 oberon_ident_item(oberon_context_t
* ctx
, char * name
)
1407 oberon_object_t
* x
;
1408 oberon_expr_t
* expr
;
1410 x
= oberon_find_object(ctx
-> decl
, name
, true);
1413 if(x
-> class == OBERON_CLASS_CONST
|| x
-> class == OBERON_CLASS_PROC
)
1418 expr
= oberon_new_item(MODE_VAR
, x
-> type
, read_only
);
1419 expr
-> item
.var
= x
;
1423 static oberon_expr_t
*
1424 oberon_qualident_expr(oberon_context_t
* ctx
)
1426 oberon_object_t
* var
;
1427 oberon_expr_t
* expr
;
1429 var
= oberon_qualident(ctx
, NULL
, 1);
1432 if(var
-> read_only
)
1434 if(var
-> module
!= ctx
-> mod
)
1440 switch(var
-> class)
1442 case OBERON_CLASS_CONST
:
1444 expr
= (oberon_expr_t
*) var
-> value
;
1446 case OBERON_CLASS_TYPE
:
1447 expr
= oberon_new_item(MODE_TYPE
, var
-> type
, read_only
);
1449 case OBERON_CLASS_VAR
:
1450 case OBERON_CLASS_VAR_PARAM
:
1451 case OBERON_CLASS_PARAM
:
1452 expr
= oberon_new_item(MODE_VAR
, var
-> type
, read_only
);
1454 case OBERON_CLASS_PROC
:
1455 expr
= oberon_new_item(MODE_VAR
, var
-> type
, true);
1458 oberon_error(ctx
, "invalid designator");
1462 expr
-> item
.var
= var
;
1467 static oberon_expr_t
*
1468 oberon_designator(oberon_context_t
* ctx
)
1471 oberon_expr_t
* expr
;
1472 oberon_object_t
* objtype
;
1474 expr
= oberon_qualident_expr(ctx
);
1476 while(expr
-> result
-> class != OBERON_TYPE_PROCEDURE
&& ISSELECTOR(ctx
-> token
))
1478 switch(ctx
-> token
)
1481 oberon_assert_token(ctx
, DOT
);
1482 name
= oberon_assert_ident(ctx
);
1483 expr
= oberon_make_record_selector(ctx
, expr
, name
);
1486 oberon_assert_token(ctx
, LBRACK
);
1487 int num_indexes
= 0;
1488 oberon_expr_t
* indexes
= NULL
;
1489 oberon_expr_list(ctx
, &num_indexes
, &indexes
, 0);
1490 oberon_assert_token(ctx
, RBRACK
);
1492 for(int i
= 0; i
< num_indexes
; i
++)
1494 expr
= oberon_make_array_selector(ctx
, expr
, indexes
);
1495 indexes
= indexes
-> next
;
1499 oberon_assert_token(ctx
, UPARROW
);
1500 expr
= oberno_make_dereferencing(ctx
, expr
);
1503 oberon_assert_token(ctx
, LPAREN
);
1504 objtype
= oberon_qualident(ctx
, NULL
, true);
1505 oberon_assert_token(ctx
, RPAREN
);
1506 oberon_check_extension_of(ctx
, expr
-> result
, objtype
-> type
);
1507 expr
= oberon_cast_expr(ctx
, expr
, objtype
-> type
);
1510 oberon_error(ctx
, "oberon_designator: wat");
1518 static oberon_expr_t
*
1519 oberon_opt_func_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1521 /* Если есть скобки - значит вызов. Если нет, то передаём указатель. */
1522 if(ctx
-> token
== LPAREN
)
1524 oberon_assert_token(ctx
, LPAREN
);
1527 oberon_expr_t
* arguments
= NULL
;
1529 if(ISEXPR(ctx
-> token
))
1531 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1534 assert(expr
-> is_item
== 1);
1535 expr
= oberon_make_call_func(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1537 oberon_assert_token(ctx
, RPAREN
);
1544 oberon_opt_proc_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1546 assert(expr
-> is_item
);
1549 oberon_expr_t
* arguments
= NULL
;
1551 if(ctx
-> token
== LPAREN
)
1553 oberon_assert_token(ctx
, LPAREN
);
1555 if(ISEXPR(ctx
-> token
))
1557 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1560 oberon_assert_token(ctx
, RPAREN
);
1563 /* Вызов происходит даже без скобок */
1564 oberon_make_call_proc(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1567 static oberon_expr_t
*
1568 oberon_element(oberon_context_t
* ctx
)
1573 e1
= oberon_expr(ctx
);
1574 oberon_check_src(ctx
, e1
);
1575 if(e1
-> result
-> class != OBERON_TYPE_INTEGER
)
1577 oberon_error(ctx
, "expected integer");
1581 if(ctx
-> token
== DOTDOT
)
1583 oberon_assert_token(ctx
, DOTDOT
);
1584 e2
= oberon_expr(ctx
);
1585 oberon_check_src(ctx
, e2
);
1586 if(e2
-> result
-> class != OBERON_TYPE_INTEGER
)
1588 oberon_error(ctx
, "expected integer");
1592 oberon_expr_t
* set
;
1593 if(e2
== NULL
&& oberon_is_const(e1
))
1595 set
= oberon_make_set_index(ctx
, e1
-> item
.integer
);
1597 else if(e2
!= NULL
&& oberon_is_const(e1
) && oberon_is_const(e2
))
1599 set
= oberon_make_set_range(ctx
, e1
-> item
.integer
, e2
-> item
.integer
);
1603 set
= oberon_new_operator(OP_RANGE
, ctx
-> set_type
, e1
, e2
);
1608 static oberon_expr_t
*
1609 oberon_make_set_union(oberon_context_t
* ctx
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1611 if(oberon_is_const(a
) && oberon_is_const(b
))
1613 return oberon_make_set(ctx
, (a
-> item
.integer
| b
-> item
.integer
));
1617 return oberon_new_operator(OP_UNION
, ctx
-> set_type
, a
, b
);
1621 static oberon_expr_t
*
1622 oberon_set(oberon_context_t
* ctx
)
1624 oberon_expr_t
* set
;
1625 oberon_expr_t
* elements
;
1626 set
= oberon_make_set(ctx
, 0);
1628 oberon_assert_token(ctx
, LBRACE
);
1629 if(ISEXPR(ctx
-> token
))
1631 elements
= oberon_element(ctx
);
1632 set
= oberon_make_set_union(ctx
, set
, elements
);
1633 while(ctx
-> token
== COMMA
)
1635 oberon_assert_token(ctx
, COMMA
);
1636 elements
= oberon_element(ctx
);
1637 set
= oberon_make_set_union(ctx
, set
, elements
);
1640 oberon_assert_token(ctx
, RBRACE
);
1645 static oberon_expr_t
*
1646 oberon_factor(oberon_context_t
* ctx
)
1648 oberon_expr_t
* expr
;
1649 oberon_type_t
* result
;
1651 switch(ctx
-> token
)
1654 expr
= oberon_designator(ctx
);
1655 expr
= oberon_opt_func_parens(ctx
, expr
);
1658 expr
= oberon_make_integer(ctx
, ctx
-> integer
);
1659 oberon_assert_token(ctx
, INTEGER
);
1662 result
= ctx
-> char_type
;
1663 expr
= oberon_new_item(MODE_CHAR
, result
, true);
1664 expr
-> item
.integer
= ctx
-> integer
;
1665 oberon_assert_token(ctx
, CHAR
);
1668 result
= ctx
-> string_type
;
1669 expr
= oberon_new_item(MODE_STRING
, result
, true);
1670 expr
-> item
.string
= ctx
-> string
;
1671 oberon_assert_token(ctx
, STRING
);
1674 expr
= oberon_make_real(ctx
, ctx
-> real
, ctx
-> longmode
);
1675 oberon_assert_token(ctx
, REAL
);
1678 expr
= oberon_set(ctx
);
1681 oberon_assert_token(ctx
, LPAREN
);
1682 expr
= oberon_expr(ctx
);
1683 oberon_assert_token(ctx
, RPAREN
);
1686 oberon_assert_token(ctx
, NOT
);
1687 expr
= oberon_factor(ctx
);
1688 expr
= oberon_make_unary_op(ctx
, NOT
, expr
);
1691 oberon_assert_token(ctx
, NIL
);
1692 expr
= oberon_new_item(MODE_NIL
, ctx
-> nil_type
, true);
1695 oberon_error(ctx
, "invalid expression");
1701 static oberon_expr_t
*
1702 oberon_make_bin_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1704 oberon_expr_t
* expr
;
1705 oberon_type_t
* result
;
1707 oberon_check_compatible_bin_expr_types(ctx
, token
, a
-> result
, b
-> result
);
1708 oberon_check_src(ctx
, a
);
1711 oberon_check_src(ctx
, b
);
1716 if(oberon_is_const(a
) && oberon_is_const(b
))
1718 expr
= oberon_make_boolean(ctx
, (1 << a
-> item
.integer
) & b
-> item
.integer
);
1722 expr
= oberon_new_operator(OP_IN
, ctx
-> bool_type
, a
, b
);
1725 else if(token
== IS
)
1727 oberon_check_type_expr(ctx
, b
);
1728 expr
= oberon_new_operator(OP_IS
, ctx
-> bool_type
, a
, b
);
1730 else if((token
>= EQUAL
&& token
<= GEQ
) || token
== OR
|| token
== AND
)
1732 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1734 if(oberon_is_const(a
) && oberon_is_const(b
)
1735 && (oberon_is_real_type(result
) || oberon_is_integer_type(result
)))
1737 if(oberon_is_real_type(result
))
1739 double x
= a
-> item
.real
;
1740 double y
= b
-> item
.real
;
1743 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1744 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1745 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1746 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1747 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1748 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1749 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1750 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1751 default: assert(0); break;
1754 else if(oberon_is_integer_type(result
))
1756 int64_t x
= a
-> item
.integer
;
1757 int64_t y
= b
-> item
.integer
;
1760 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1761 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1762 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1763 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1764 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1765 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1766 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1767 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1768 default: assert(0); break;
1778 a
= oberon_cast_expr(ctx
, a
, result
);
1779 b
= oberon_cast_expr(ctx
, b
, result
);
1780 result
= ctx
-> bool_type
;
1783 case EQUAL
: expr
= oberon_new_operator(OP_EQ
, result
, a
, b
); break;
1784 case NEQ
: expr
= oberon_new_operator(OP_NEQ
, result
, a
, b
); break;
1785 case LESS
: expr
= oberon_new_operator(OP_LSS
, result
, a
, b
); break;
1786 case LEQ
: expr
= oberon_new_operator(OP_LEQ
, result
, a
, b
); break;
1787 case GREAT
: expr
= oberon_new_operator(OP_GRT
, result
, a
, b
); break;
1788 case GEQ
: expr
= oberon_new_operator(OP_GEQ
, result
, a
, b
); break;
1789 case OR
: expr
= oberon_new_operator(OP_LOGIC_OR
, result
, a
, b
); break;
1790 case AND
: expr
= oberon_new_operator(OP_LOGIC_AND
, result
, a
, b
); break;
1791 default: assert(0); break;
1795 else if(token
== SLASH
)
1797 if(oberon_is_set_type(a
-> result
) && oberon_is_set_type(b
-> result
))
1799 if(oberon_is_const(a
) && oberon_is_const(b
))
1801 int64_t x
= a
-> item
.integer
;
1802 int64_t y
= b
-> item
.integer
;
1803 expr
= oberon_make_set(ctx
, x
^ y
);
1807 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1808 a
= oberon_cast_expr(ctx
, a
, result
);
1809 b
= oberon_cast_expr(ctx
, b
, result
);
1810 expr
= oberon_new_operator(OP_SYM_DIFFERENCE
, result
, a
, b
);
1815 result
= oberon_get_longer_real_type(ctx
, a
-> result
, b
-> result
);
1816 if(oberon_is_const(a
) && oberon_is_const(b
))
1818 double x
= a
-> item
.real
;
1819 double y
= b
-> item
.real
;
1820 expr
= oberon_make_real_typed(ctx
, x
/ y
, result
);
1824 a
= oberon_cast_expr(ctx
, a
, result
);
1825 b
= oberon_cast_expr(ctx
, b
, result
);
1826 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
1832 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1834 if(oberon_is_const(a
) && oberon_is_const(b
))
1836 if(oberon_is_set_type(result
))
1838 int64_t x
= a
-> item
.integer
;
1839 int64_t y
= b
-> item
.integer
;
1842 case PLUS
: expr
= oberon_make_set(ctx
, x
| y
); break;
1843 case MINUS
: expr
= oberon_make_set(ctx
, x
& ~y
); break;
1844 case STAR
: expr
= oberon_make_set(ctx
, x
& y
); break;
1845 default: assert(0); break;
1848 if(oberon_is_real_type(result
))
1850 double x
= a
-> item
.real
;
1851 double y
= b
-> item
.real
;
1854 case PLUS
: expr
= oberon_make_real_typed(ctx
, x
+ y
, result
); break;
1855 case MINUS
: expr
= oberon_make_real_typed(ctx
, x
- y
, result
); break;
1856 case STAR
: expr
= oberon_make_real_typed(ctx
, x
* y
, result
); break;
1857 default: assert(0); break;
1860 else if(oberon_is_integer_type(result
))
1862 int64_t x
= a
-> item
.integer
;
1863 int64_t y
= b
-> item
.integer
;
1866 case PLUS
: expr
= oberon_make_integer(ctx
, x
+ y
); break;
1867 case MINUS
: expr
= oberon_make_integer(ctx
, x
- y
); break;
1868 case STAR
: expr
= oberon_make_integer(ctx
, x
* y
); break;
1869 case DIV
: expr
= oberon_make_integer(ctx
, x
/ y
); break;
1870 case MOD
: expr
= oberon_make_integer(ctx
, x
% y
); break;
1871 default: assert(0); break;
1881 a
= oberon_cast_expr(ctx
, a
, result
);
1882 b
= oberon_cast_expr(ctx
, b
, result
);
1885 if(oberon_is_set_type(result
))
1890 expr
= oberon_new_operator(OP_UNION
, result
, a
, b
);
1893 expr
= oberon_new_operator(OP_DIFFERENCE
, result
, a
, b
);
1896 expr
= oberon_new_operator(OP_INTERSECTION
, result
, a
, b
);
1903 else if(oberon_is_number_type(result
))
1908 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
1911 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
1914 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
1931 #define ISMULOP(x) \
1932 ((x) >= STAR && (x) <= AND)
1934 static oberon_expr_t
*
1935 oberon_term_expr(oberon_context_t
* ctx
)
1937 oberon_expr_t
* expr
;
1939 expr
= oberon_factor(ctx
);
1940 while(ISMULOP(ctx
-> token
))
1942 int token
= ctx
-> token
;
1943 oberon_read_token(ctx
);
1945 oberon_expr_t
* inter
= oberon_factor(ctx
);
1946 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
1952 #define ISADDOP(x) \
1953 ((x) >= PLUS && (x) <= OR)
1955 static oberon_expr_t
*
1956 oberon_simple_expr(oberon_context_t
* ctx
)
1958 oberon_expr_t
* expr
;
1961 if(ctx
-> token
== PLUS
)
1964 oberon_assert_token(ctx
, PLUS
);
1966 else if(ctx
-> token
== MINUS
)
1969 oberon_assert_token(ctx
, MINUS
);
1972 expr
= oberon_term_expr(ctx
);
1974 while(ISADDOP(ctx
-> token
))
1976 int token
= ctx
-> token
;
1977 oberon_read_token(ctx
);
1979 oberon_expr_t
* inter
= oberon_term_expr(ctx
);
1980 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
1985 expr
= oberon_make_unary_op(ctx
, MINUS
, expr
);
1991 #define ISRELATION(x) \
1992 ((x) >= EQUAL && (x) <= IS)
1994 static oberon_expr_t
*
1995 oberon_expr(oberon_context_t
* ctx
)
1997 oberon_expr_t
* expr
;
1999 expr
= oberon_simple_expr(ctx
);
2000 while(ISRELATION(ctx
-> token
))
2002 int token
= ctx
-> token
;
2003 oberon_read_token(ctx
);
2005 oberon_expr_t
* inter
= oberon_simple_expr(ctx
);
2006 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2013 oberon_is_const(oberon_expr_t
* expr
)
2015 if(expr
-> is_item
== false)
2020 switch(expr
-> item
.mode
)
2041 oberon_check_const(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2043 if(!oberon_is_const(expr
))
2045 oberon_error(ctx
, "const expression are required");
2049 static oberon_item_t
*
2050 oberon_const_expr(oberon_context_t
* ctx
)
2052 oberon_expr_t
* expr
;
2053 expr
= oberon_expr(ctx
);
2054 oberon_check_const(ctx
, expr
);
2055 return (oberon_item_t
*) expr
;
2058 // =======================================================================
2060 // =======================================================================
2062 static void oberon_decl_seq(oberon_context_t
* ctx
);
2063 static void oberon_statement_seq(oberon_context_t
* ctx
);
2064 static void oberon_initialize_decl(oberon_context_t
* ctx
);
2067 oberon_expect_token(oberon_context_t
* ctx
, int token
)
2069 if(ctx
-> token
!= token
)
2071 oberon_error(ctx
, "unexpected token %i (%i)", ctx
-> token
, token
);
2076 oberon_assert_token(oberon_context_t
* ctx
, int token
)
2078 oberon_expect_token(ctx
, token
);
2079 oberon_read_token(ctx
);
2083 oberon_assert_ident(oberon_context_t
* ctx
)
2085 oberon_expect_token(ctx
, IDENT
);
2086 char * ident
= ctx
-> string
;
2087 oberon_read_token(ctx
);
2092 oberon_def(oberon_context_t
* ctx
, int * export
, int * read_only
)
2094 switch(ctx
-> token
)
2097 oberon_assert_token(ctx
, STAR
);
2102 oberon_assert_token(ctx
, MINUS
);
2113 static oberon_object_t
*
2114 oberon_ident_def(oberon_context_t
* ctx
, int class, bool check_upscope
)
2119 oberon_object_t
* x
;
2121 name
= oberon_assert_ident(ctx
);
2122 oberon_def(ctx
, &export
, &read_only
);
2124 x
= oberon_define_object(ctx
-> decl
, name
, class, export
, read_only
, check_upscope
);
2129 oberon_ident_list(oberon_context_t
* ctx
, int class, bool check_upscope
, int * num
, oberon_object_t
** list
)
2132 *list
= oberon_ident_def(ctx
, class, check_upscope
);
2133 while(ctx
-> token
== COMMA
)
2135 oberon_assert_token(ctx
, COMMA
);
2136 oberon_ident_def(ctx
, class, check_upscope
);
2142 oberon_var_decl(oberon_context_t
* ctx
)
2145 oberon_object_t
* list
;
2146 oberon_type_t
* type
;
2147 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2149 oberon_ident_list(ctx
, OBERON_CLASS_VAR
, false, &num
, &list
);
2150 oberon_assert_token(ctx
, COLON
);
2151 oberon_type(ctx
, &type
);
2153 oberon_object_t
* var
= list
;
2154 for(int i
= 0; i
< num
; i
++)
2161 static oberon_object_t
*
2162 oberon_fp_section(oberon_context_t
* ctx
, int * num_decl
)
2164 int class = OBERON_CLASS_PARAM
;
2165 if(ctx
-> token
== VAR
)
2167 oberon_read_token(ctx
);
2168 class = OBERON_CLASS_VAR_PARAM
;
2172 oberon_object_t
* list
;
2173 oberon_ident_list(ctx
, class, false, &num
, &list
);
2175 oberon_assert_token(ctx
, COLON
);
2177 oberon_type_t
* type
;
2178 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2179 oberon_type(ctx
, &type
);
2181 oberon_object_t
* param
= list
;
2182 for(int i
= 0; i
< num
; i
++)
2184 param
-> type
= type
;
2185 param
= param
-> next
;
2192 #define ISFPSECTION \
2193 ((ctx -> token == VAR) || (ctx -> token == IDENT))
2196 oberon_formal_pars(oberon_context_t
* ctx
, oberon_type_t
* signature
)
2198 oberon_assert_token(ctx
, LPAREN
);
2202 signature
-> decl
= oberon_fp_section(ctx
, &signature
-> num_decl
);
2203 while(ctx
-> token
== SEMICOLON
)
2205 oberon_assert_token(ctx
, SEMICOLON
);
2206 oberon_fp_section(ctx
, &signature
-> num_decl
);
2210 oberon_assert_token(ctx
, RPAREN
);
2212 if(ctx
-> token
== COLON
)
2214 oberon_assert_token(ctx
, COLON
);
2216 oberon_object_t
* typeobj
;
2217 typeobj
= oberon_qualident(ctx
, NULL
, 1);
2218 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2220 oberon_error(ctx
, "function result is not type");
2222 if(typeobj
-> type
-> class == OBERON_TYPE_RECORD
2223 || typeobj
-> type
-> class == OBERON_TYPE_ARRAY
)
2225 oberon_error(ctx
, "records or arrays could not be result of function");
2227 signature
-> base
= typeobj
-> type
;
2232 oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
)
2234 oberon_type_t
* signature
;
2236 signature
-> class = OBERON_TYPE_PROCEDURE
;
2237 signature
-> num_decl
= 0;
2238 signature
-> base
= ctx
-> notype_type
;
2239 signature
-> decl
= NULL
;
2241 if(ctx
-> token
== LPAREN
)
2243 oberon_formal_pars(ctx
, signature
);
2248 oberon_compare_signatures(oberon_context_t
* ctx
, oberon_type_t
* a
, oberon_type_t
* b
)
2250 if(a
-> num_decl
!= b
-> num_decl
)
2252 oberon_error(ctx
, "number parameters not matched");
2255 int num_param
= a
-> num_decl
;
2256 oberon_object_t
* param_a
= a
-> decl
;
2257 oberon_object_t
* param_b
= b
-> decl
;
2258 for(int i
= 0; i
< num_param
; i
++)
2260 if(strcmp(param_a
-> name
, param_b
-> name
) != 0)
2262 oberon_error(ctx
, "param %i name not matched", i
+ 1);
2265 if(param_a
-> type
!= param_b
-> type
)
2267 oberon_error(ctx
, "param %i type not matched", i
+ 1);
2270 param_a
= param_a
-> next
;
2271 param_b
= param_b
-> next
;
2276 oberon_make_return(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2278 oberon_object_t
* proc
= ctx
-> decl
-> parent
;
2279 oberon_type_t
* result_type
= proc
-> type
-> base
;
2281 if(result_type
-> class == OBERON_TYPE_NOTYPE
)
2285 oberon_error(ctx
, "procedure has no result type");
2292 oberon_error(ctx
, "procedure requires expression on result");
2295 oberon_check_src(ctx
, expr
);
2296 oberon_check_assignment_compatible(ctx
, expr
, result_type
);
2297 expr
= oberon_cast_expr(ctx
, expr
, result_type
);
2300 proc
-> has_return
= 1;
2302 oberon_generate_return(ctx
, expr
);
2306 oberon_proc_decl_body(oberon_context_t
* ctx
, oberon_object_t
* proc
)
2308 oberon_assert_token(ctx
, SEMICOLON
);
2310 ctx
-> decl
= proc
-> scope
;
2312 oberon_decl_seq(ctx
);
2314 oberon_generate_begin_proc(ctx
, proc
);
2316 if(ctx
-> token
== BEGIN
)
2318 oberon_assert_token(ctx
, BEGIN
);
2319 oberon_statement_seq(ctx
);
2322 oberon_assert_token(ctx
, END
);
2323 char * name
= oberon_assert_ident(ctx
);
2324 if(strcmp(name
, proc
-> name
) != 0)
2326 oberon_error(ctx
, "procedure name not matched");
2329 if(proc
-> type
-> base
-> class == OBERON_TYPE_NOTYPE
2330 && proc
-> has_return
== 0)
2332 oberon_make_return(ctx
, NULL
);
2335 if(proc
-> has_return
== 0)
2337 oberon_error(ctx
, "procedure requires return");
2340 oberon_generate_end_proc(ctx
);
2341 oberon_close_scope(ctx
-> decl
);
2345 oberon_proc_decl(oberon_context_t
* ctx
)
2347 oberon_assert_token(ctx
, PROCEDURE
);
2350 if(ctx
-> token
== UPARROW
)
2352 oberon_assert_token(ctx
, UPARROW
);
2359 name
= oberon_assert_ident(ctx
);
2360 oberon_def(ctx
, &export
, &read_only
);
2362 oberon_scope_t
* proc_scope
;
2363 proc_scope
= oberon_open_scope(ctx
);
2364 ctx
-> decl
-> local
= 1;
2366 oberon_type_t
* signature
;
2367 signature
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2368 oberon_opt_formal_pars(ctx
, &signature
);
2370 //oberon_initialize_decl(ctx);
2371 oberon_generator_init_type(ctx
, signature
);
2372 oberon_close_scope(ctx
-> decl
);
2374 oberon_object_t
* proc
;
2375 proc
= oberon_find_object(ctx
-> decl
, name
, 0);
2378 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, export
, read_only
, false);
2379 proc
-> type
= signature
;
2380 proc
-> scope
= proc_scope
;
2381 oberon_generator_init_proc(ctx
, proc
);
2385 if(proc
-> class != OBERON_CLASS_PROC
)
2387 oberon_error(ctx
, "mult definition");
2394 oberon_error(ctx
, "mult procedure definition");
2398 if(proc
-> export
!= export
|| proc
-> read_only
!= read_only
)
2400 oberon_error(ctx
, "export type not matched");
2403 oberon_compare_signatures(ctx
, proc
-> type
, signature
);
2406 proc_scope
-> parent
= proc
;
2407 oberon_object_t
* param
= proc_scope
-> list
-> next
;
2410 param
-> parent
= proc
;
2411 param
= param
-> next
;
2417 oberon_proc_decl_body(ctx
, proc
);
2422 oberon_const_decl(oberon_context_t
* ctx
)
2424 oberon_item_t
* value
;
2425 oberon_object_t
* constant
;
2427 constant
= oberon_ident_def(ctx
, OBERON_CLASS_CONST
, false);
2428 oberon_assert_token(ctx
, EQUAL
);
2429 value
= oberon_const_expr(ctx
);
2430 constant
-> value
= value
;
2434 oberon_make_array_type(oberon_context_t
* ctx
, oberon_expr_t
* size
, oberon_type_t
* base
, oberon_type_t
** type
)
2436 if(size
-> is_item
== 0)
2438 oberon_error(ctx
, "requires constant");
2441 if(size
-> item
.mode
!= MODE_INTEGER
)
2443 oberon_error(ctx
, "requires integer constant");
2446 oberon_type_t
* arr
;
2448 arr
-> class = OBERON_TYPE_ARRAY
;
2449 arr
-> size
= size
-> item
.integer
;
2454 oberon_qualident_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2457 oberon_object_t
* to
;
2459 to
= oberon_qualident(ctx
, &name
, 0);
2461 //name = oberon_assert_ident(ctx);
2462 //to = oberon_find_object(ctx -> decl, name, 0);
2466 if(to
-> class != OBERON_CLASS_TYPE
)
2468 oberon_error(ctx
, "not a type");
2473 to
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, false, false, false);
2474 to
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2480 static void oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
);
2483 * Правило граматики "type". Указатель type должен указывать на существующий объект!
2487 oberon_make_multiarray(oberon_context_t
* ctx
, oberon_expr_t
* sizes
, oberon_type_t
* base
, oberon_type_t
** type
)
2495 oberon_type_t
* dim
;
2496 dim
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2498 oberon_make_multiarray(ctx
, sizes
-> next
, base
, &dim
);
2500 oberon_make_array_type(ctx
, sizes
, dim
, type
);
2504 oberon_make_open_array(oberon_context_t
* ctx
, oberon_type_t
* base
, oberon_type_t
* type
)
2506 type
-> class = OBERON_TYPE_ARRAY
;
2508 type
-> base
= base
;
2512 oberon_field_list(oberon_context_t
* ctx
, oberon_type_t
* rec
, oberon_scope_t
* modscope
)
2514 if(ctx
-> token
== IDENT
)
2517 oberon_object_t
* list
;
2518 oberon_type_t
* type
;
2519 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2521 oberon_ident_list(ctx
, OBERON_CLASS_FIELD
, true, &num
, &list
);
2522 oberon_assert_token(ctx
, COLON
);
2524 oberon_scope_t
* current
= ctx
-> decl
;
2525 ctx
-> decl
= modscope
;
2526 oberon_type(ctx
, &type
);
2527 ctx
-> decl
= current
;
2529 oberon_object_t
* field
= list
;
2530 for(int i
= 0; i
< num
; i
++)
2532 field
-> type
= type
;
2533 field
= field
-> next
;
2536 rec
-> num_decl
+= num
;
2541 oberon_type_record_body(oberon_context_t
* ctx
, oberon_type_t
* rec
)
2543 oberon_scope_t
* modscope
= ctx
-> mod
-> decl
;
2544 oberon_scope_t
* oldscope
= ctx
-> decl
;
2545 ctx
-> decl
= modscope
;
2547 if(ctx
-> token
== LPAREN
)
2549 oberon_assert_token(ctx
, LPAREN
);
2551 oberon_object_t
* typeobj
;
2552 typeobj
= oberon_qualident(ctx
, NULL
, true);
2554 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2556 oberon_error(ctx
, "base must be type");
2559 oberon_type_t
* base
= typeobj
-> type
;
2560 if(base
-> class == OBERON_TYPE_POINTER
)
2562 base
= base
-> base
;
2565 if(base
-> class != OBERON_TYPE_RECORD
)
2567 oberon_error(ctx
, "base must be record type");
2571 ctx
-> decl
= base
-> scope
;
2573 oberon_assert_token(ctx
, RPAREN
);
2580 oberon_scope_t
* this_scope
;
2581 this_scope
= oberon_open_scope(ctx
);
2582 this_scope
-> local
= true;
2583 this_scope
-> parent
= NULL
;
2584 this_scope
-> parent_type
= rec
;
2586 oberon_field_list(ctx
, rec
, modscope
);
2587 while(ctx
-> token
== SEMICOLON
)
2589 oberon_assert_token(ctx
, SEMICOLON
);
2590 oberon_field_list(ctx
, rec
, modscope
);
2593 rec
-> scope
= this_scope
;
2594 rec
-> decl
= this_scope
-> list
-> next
;
2595 ctx
-> decl
= oldscope
;
2599 oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2601 if(ctx
-> token
== IDENT
)
2603 oberon_qualident_type(ctx
, type
);
2605 else if(ctx
-> token
== ARRAY
)
2607 oberon_assert_token(ctx
, ARRAY
);
2610 oberon_expr_t
* sizes
;
2612 if(ISEXPR(ctx
-> token
))
2614 oberon_expr_list(ctx
, &num_sizes
, &sizes
, 1);
2617 oberon_assert_token(ctx
, OF
);
2619 oberon_type_t
* base
;
2620 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2621 oberon_type(ctx
, &base
);
2625 oberon_make_open_array(ctx
, base
, *type
);
2629 oberon_make_multiarray(ctx
, sizes
, base
, type
);
2632 else if(ctx
-> token
== RECORD
)
2634 oberon_type_t
* rec
;
2636 rec
-> class = OBERON_TYPE_RECORD
;
2637 rec
-> module
= ctx
-> mod
;
2639 oberon_assert_token(ctx
, RECORD
);
2640 oberon_type_record_body(ctx
, rec
);
2641 oberon_assert_token(ctx
, END
);
2645 else if(ctx
-> token
== POINTER
)
2647 oberon_assert_token(ctx
, POINTER
);
2648 oberon_assert_token(ctx
, TO
);
2650 oberon_type_t
* base
;
2651 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2652 oberon_type(ctx
, &base
);
2654 oberon_type_t
* ptr
;
2656 ptr
-> class = OBERON_TYPE_POINTER
;
2659 else if(ctx
-> token
== PROCEDURE
)
2661 oberon_open_scope(ctx
);
2662 oberon_assert_token(ctx
, PROCEDURE
);
2663 oberon_opt_formal_pars(ctx
, type
);
2664 oberon_close_scope(ctx
-> decl
);
2668 oberon_error(ctx
, "invalid type declaration");
2673 oberon_type_decl(oberon_context_t
* ctx
)
2676 oberon_object_t
* newtype
;
2677 oberon_type_t
* type
;
2681 name
= oberon_assert_ident(ctx
);
2682 oberon_def(ctx
, &export
, &read_only
);
2684 newtype
= oberon_find_object(ctx
-> decl
, name
, 0);
2687 newtype
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, export
, read_only
, false);
2688 newtype
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2689 assert(newtype
-> type
);
2693 if(newtype
-> class != OBERON_CLASS_TYPE
)
2695 oberon_error(ctx
, "mult definition");
2698 if(newtype
-> linked
)
2700 oberon_error(ctx
, "mult definition - already linked");
2703 newtype
-> export
= export
;
2704 newtype
-> read_only
= read_only
;
2707 oberon_assert_token(ctx
, EQUAL
);
2709 type
= newtype
-> type
;
2710 oberon_type(ctx
, &type
);
2712 if(type
-> class == OBERON_TYPE_NOTYPE
)
2714 oberon_error(ctx
, "recursive alias declaration");
2717 newtype
-> type
= type
;
2718 newtype
-> linked
= 1;
2721 static void oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2722 static void oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2725 oberon_prevent_recursive_pointer(oberon_context_t
* ctx
, oberon_type_t
* type
)
2727 if(type
-> class != OBERON_TYPE_POINTER
2728 && type
-> class != OBERON_TYPE_ARRAY
)
2733 if(type
-> recursive
)
2735 oberon_error(ctx
, "recursive pointer declaration");
2738 if(type
-> class == OBERON_TYPE_POINTER
2739 && type
-> base
-> class == OBERON_TYPE_POINTER
)
2741 oberon_error(ctx
, "attempt to make pointer to pointer");
2744 type
-> recursive
= 1;
2746 oberon_prevent_recursive_pointer(ctx
, type
-> base
);
2748 type
-> recursive
= 0;
2752 oberon_prevent_recursive_record(oberon_context_t
* ctx
, oberon_type_t
* type
)
2754 if(type
-> class != OBERON_TYPE_RECORD
)
2759 if(type
-> recursive
)
2761 oberon_error(ctx
, "recursive record declaration");
2764 type
-> recursive
= 1;
2768 oberon_prevent_recursive_record(ctx
, type
-> base
);
2771 int num_fields
= type
-> num_decl
;
2772 oberon_object_t
* field
= type
-> decl
;
2773 for(int i
= 0; i
< num_fields
; i
++)
2775 oberon_prevent_recursive_object(ctx
, field
);
2776 field
= field
-> next
;
2779 type
-> recursive
= 0;
2782 oberon_prevent_recursive_procedure(oberon_context_t
* ctx
, oberon_type_t
* type
)
2784 if(type
-> class != OBERON_TYPE_PROCEDURE
)
2789 if(type
-> recursive
)
2791 oberon_error(ctx
, "recursive procedure declaration");
2794 type
-> recursive
= 1;
2796 int num_fields
= type
-> num_decl
;
2797 oberon_object_t
* field
= type
-> decl
;
2798 for(int i
= 0; i
< num_fields
; i
++)
2800 oberon_prevent_recursive_object(ctx
, field
);
2801 field
= field
-> next
;
2804 type
-> recursive
= 0;
2808 oberon_prevent_recursive_array(oberon_context_t
* ctx
, oberon_type_t
* type
)
2810 if(type
-> class != OBERON_TYPE_ARRAY
)
2815 if(type
-> recursive
)
2817 oberon_error(ctx
, "recursive array declaration");
2820 type
-> recursive
= 1;
2822 oberon_prevent_recursive_type(ctx
, type
-> base
);
2824 type
-> recursive
= 0;
2828 oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2830 if(type
-> class == OBERON_TYPE_POINTER
)
2832 oberon_prevent_recursive_pointer(ctx
, type
);
2834 else if(type
-> class == OBERON_TYPE_RECORD
)
2836 oberon_prevent_recursive_record(ctx
, type
);
2838 else if(type
-> class == OBERON_TYPE_ARRAY
)
2840 oberon_prevent_recursive_array(ctx
, type
);
2842 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2844 oberon_prevent_recursive_procedure(ctx
, type
);
2849 oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2853 case OBERON_CLASS_VAR
:
2854 case OBERON_CLASS_TYPE
:
2855 case OBERON_CLASS_PARAM
:
2856 case OBERON_CLASS_VAR_PARAM
:
2857 case OBERON_CLASS_FIELD
:
2858 oberon_prevent_recursive_type(ctx
, x
-> type
);
2860 case OBERON_CLASS_CONST
:
2861 case OBERON_CLASS_PROC
:
2862 case OBERON_CLASS_MODULE
:
2865 oberon_error(ctx
, "oberon_prevent_recursive_object: wat");
2871 oberon_prevent_recursive_decl(oberon_context_t
* ctx
)
2873 oberon_object_t
* x
= ctx
-> decl
-> list
-> next
;
2877 oberon_prevent_recursive_object(ctx
, x
);
2882 static void oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2883 static void oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2886 oberon_initialize_record_fields(oberon_context_t
* ctx
, oberon_type_t
* type
)
2888 if(type
-> class != OBERON_TYPE_RECORD
)
2893 int num_fields
= type
-> num_decl
;
2894 oberon_object_t
* field
= type
-> decl
;
2895 for(int i
= 0; i
< num_fields
; i
++)
2897 if(field
-> type
-> class == OBERON_TYPE_POINTER
)
2899 oberon_initialize_type(ctx
, field
-> type
);
2902 oberon_initialize_object(ctx
, field
);
2903 field
= field
-> next
;
2906 oberon_generator_init_record(ctx
, type
);
2910 oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2912 if(type
-> class == OBERON_TYPE_NOTYPE
)
2914 oberon_error(ctx
, "undeclarated type");
2917 if(type
-> initialized
)
2922 type
-> initialized
= 1;
2924 if(type
-> class == OBERON_TYPE_POINTER
)
2926 oberon_initialize_type(ctx
, type
-> base
);
2927 oberon_generator_init_type(ctx
, type
);
2929 else if(type
-> class == OBERON_TYPE_ARRAY
)
2931 if(type
-> size
!= 0)
2933 if(type
-> base
-> class == OBERON_TYPE_ARRAY
)
2935 if(type
-> base
-> size
== 0)
2937 oberon_error(ctx
, "open array not allowed as array element");
2942 oberon_initialize_type(ctx
, type
-> base
);
2943 oberon_generator_init_type(ctx
, type
);
2945 else if(type
-> class == OBERON_TYPE_RECORD
)
2947 oberon_generator_init_type(ctx
, type
);
2948 oberon_initialize_record_fields(ctx
, type
);
2950 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2952 int num_fields
= type
-> num_decl
;
2953 oberon_object_t
* field
= type
-> decl
;
2954 for(int i
= 0; i
< num_fields
; i
++)
2956 //oberon_initialize_object(ctx, field);
2957 oberon_initialize_type(ctx
, field
-> type
);
2958 field
= field
-> next
;
2961 oberon_generator_init_type(ctx
, type
);
2965 oberon_generator_init_type(ctx
, type
);
2970 oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2972 if(x
-> initialized
)
2977 x
-> initialized
= 1;
2981 case OBERON_CLASS_TYPE
:
2982 oberon_initialize_type(ctx
, x
-> type
);
2984 case OBERON_CLASS_VAR
:
2985 case OBERON_CLASS_FIELD
:
2986 if(x
-> type
-> class == OBERON_TYPE_ARRAY
)
2988 if(x
-> type
-> size
== 0)
2990 oberon_error(ctx
, "open array not allowed as variable or field");
2993 oberon_initialize_type(ctx
, x
-> type
);
2994 oberon_generator_init_var(ctx
, x
);
2996 case OBERON_CLASS_PARAM
:
2997 case OBERON_CLASS_VAR_PARAM
:
2998 oberon_initialize_type(ctx
, x
-> type
);
2999 oberon_generator_init_var(ctx
, x
);
3001 case OBERON_CLASS_CONST
:
3002 case OBERON_CLASS_PROC
:
3003 case OBERON_CLASS_MODULE
:
3006 oberon_error(ctx
, "oberon_initialize_object: wat");
3012 oberon_initialize_decl(oberon_context_t
* ctx
)
3014 oberon_object_t
* x
= ctx
-> decl
-> list
;
3018 oberon_initialize_object(ctx
, x
-> next
);
3024 oberon_prevent_undeclarated_procedures(oberon_context_t
* ctx
)
3026 oberon_object_t
* x
= ctx
-> decl
-> list
;
3030 if(x
-> next
-> class == OBERON_CLASS_PROC
)
3032 if(x
-> next
-> linked
== 0)
3034 oberon_error(ctx
, "unresolved forward declaration");
3042 oberon_decl_seq(oberon_context_t
* ctx
)
3044 if(ctx
-> token
== CONST
)
3046 oberon_assert_token(ctx
, CONST
);
3047 while(ctx
-> token
== IDENT
)
3049 oberon_const_decl(ctx
);
3050 oberon_assert_token(ctx
, SEMICOLON
);
3054 if(ctx
-> token
== TYPE
)
3056 oberon_assert_token(ctx
, TYPE
);
3057 while(ctx
-> token
== IDENT
)
3059 oberon_type_decl(ctx
);
3060 oberon_assert_token(ctx
, SEMICOLON
);
3064 if(ctx
-> token
== VAR
)
3066 oberon_assert_token(ctx
, VAR
);
3067 while(ctx
-> token
== IDENT
)
3069 oberon_var_decl(ctx
);
3070 oberon_assert_token(ctx
, SEMICOLON
);
3074 oberon_prevent_recursive_decl(ctx
);
3075 oberon_initialize_decl(ctx
);
3077 while(ctx
-> token
== PROCEDURE
)
3079 oberon_proc_decl(ctx
);
3080 oberon_assert_token(ctx
, SEMICOLON
);
3083 oberon_prevent_undeclarated_procedures(ctx
);
3086 static oberon_expr_t
*
3087 oberon_make_temp_var_item(oberon_context_t
* ctx
, oberon_type_t
* type
)
3089 oberon_object_t
* x
;
3090 oberon_expr_t
* expr
;
3092 x
= oberon_create_object(ctx
-> decl
, "TEMP", OBERON_CLASS_VAR
, false, false);
3095 oberon_generator_init_temp_var(ctx
, x
);
3097 expr
= oberon_new_item(MODE_VAR
, type
, false);
3098 expr
-> item
.var
= x
;
3103 oberon_statement_seq(oberon_context_t
* ctx
);
3106 oberon_assign(oberon_context_t
* ctx
, oberon_expr_t
* src
, oberon_expr_t
* dst
)
3108 oberon_check_dst(ctx
, dst
);
3109 oberon_check_assignment_compatible(ctx
, src
, dst
-> result
);
3111 if(oberon_is_array_of_char_type(dst
-> result
)
3112 && oberon_is_string_type(src
-> result
))
3115 oberon_make_copy_call(ctx
, 2, src
);
3119 src
= oberon_cast_expr(ctx
, src
, dst
-> result
);
3120 oberon_generate_assign(ctx
, src
, dst
);
3124 static oberon_expr_t
*
3125 oberon_case_labels(oberon_context_t
* ctx
, oberon_expr_t
* val
)
3129 oberon_expr_t
* cond
;
3130 oberon_expr_t
* cond2
;
3132 e1
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3135 if(ctx
-> token
== DOTDOT
)
3137 oberon_assert_token(ctx
, DOTDOT
);
3138 e2
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3144 cond
= oberon_make_bin_op(ctx
, EQUAL
, val
, e1
);
3148 /* val >= e1 && val <= e2 */
3149 cond
= oberon_make_bin_op(ctx
, GEQ
, val
, e1
);
3150 cond2
= oberon_make_bin_op(ctx
, LEQ
, val
, e2
);
3151 cond
= oberon_make_bin_op(ctx
, AND
, cond
, cond2
);
3158 oberon_case(oberon_context_t
* ctx
, oberon_expr_t
* val
, gen_label_t
* end
)
3160 oberon_expr_t
* cond
;
3161 oberon_expr_t
* cond2
;
3162 gen_label_t
* this_end
;
3164 if(ISEXPR(ctx
-> token
))
3166 this_end
= oberon_generator_reserve_label(ctx
);
3168 cond
= oberon_case_labels(ctx
, val
);
3169 while(ctx
-> token
== COMMA
)
3171 oberon_assert_token(ctx
, COMMA
);
3173 cond2
= oberon_case_labels(ctx
, val
);
3174 cond
= oberon_make_bin_op(ctx
, OR
, cond
, cond2
);
3176 oberon_assert_token(ctx
, COLON
);
3178 oberon_generate_branch(ctx
, cond
, false, this_end
);
3179 oberon_statement_seq(ctx
);
3180 oberon_generate_goto(ctx
, end
);
3182 oberon_generate_label(ctx
, this_end
);
3187 oberon_case_statement(oberon_context_t
* ctx
)
3189 oberon_expr_t
* val
;
3190 oberon_expr_t
* expr
;
3193 end
= oberon_generator_reserve_label(ctx
);
3195 oberon_assert_token(ctx
, CASE
);
3196 expr
= oberon_expr(ctx
);
3197 val
= oberon_make_temp_var_item(ctx
, expr
-> result
);
3198 oberon_assign(ctx
, expr
, val
);
3199 oberon_assert_token(ctx
, OF
);
3200 oberon_case(ctx
, val
, end
);
3201 while(ctx
-> token
== BAR
)
3203 oberon_assert_token(ctx
, BAR
);
3204 oberon_case(ctx
, val
, end
);
3207 if(ctx
-> token
== ELSE
)
3209 oberon_assert_token(ctx
, ELSE
);
3210 oberon_statement_seq(ctx
);
3214 oberon_generate_trap(ctx
, -1);
3217 oberon_generate_label(ctx
, end
);
3218 oberon_assert_token(ctx
, END
);
3222 oberon_with_guard_do(oberon_context_t
* ctx
, gen_label_t
* end
)
3224 oberon_expr_t
* val
;
3225 oberon_expr_t
* var
;
3226 oberon_expr_t
* type
;
3227 oberon_expr_t
* cond
;
3228 oberon_expr_t
* cast
;
3229 oberon_type_t
* old_type
;
3230 gen_var_t
* old_var
;
3231 gen_label_t
* this_end
;
3233 this_end
= oberon_generator_reserve_label(ctx
);
3235 var
= oberon_qualident_expr(ctx
);
3236 oberon_assert_token(ctx
, COLON
);
3237 type
= oberon_qualident_expr(ctx
);
3238 cond
= oberon_make_bin_op(ctx
, IS
, var
, type
);
3240 oberon_assert_token(ctx
, DO
);
3241 oberon_generate_branch(ctx
, cond
, false, this_end
);
3243 /* Сохраняем ссылку во временной переменной */
3244 val
= oberon_make_temp_var_item(ctx
, type
-> result
);
3245 //cast = oberno_make_record_cast(ctx, var, type -> result);
3246 cast
= oberon_cast_expr(ctx
, var
, type
-> result
);
3247 oberon_assign(ctx
, cast
, val
);
3248 /* Подменяем тип у оригинальной переменной */
3249 old_type
= var
-> item
.var
-> type
;
3250 var
-> item
.var
-> type
= type
-> result
;
3251 /* Подменяем ссылку на переменную */
3252 old_var
= var
-> item
.var
-> gen_var
;
3253 var
-> item
.var
-> gen_var
= val
-> item
.var
-> gen_var
;
3255 oberon_statement_seq(ctx
);
3256 oberon_generate_goto(ctx
, end
);
3257 oberon_generate_label(ctx
, this_end
);
3259 /* Возвращаем исходное состояние */
3260 var
-> item
.var
-> gen_var
= old_var
;
3261 var
-> item
.var
-> type
= old_type
;
3265 oberon_with_statement(oberon_context_t
* ctx
)
3268 end
= oberon_generator_reserve_label(ctx
);
3270 oberon_assert_token(ctx
, WITH
);
3271 oberon_with_guard_do(ctx
, end
);
3272 while(ctx
-> token
== BAR
)
3274 oberon_assert_token(ctx
, BAR
);
3275 oberon_with_guard_do(ctx
, end
);
3278 if(ctx
-> token
== ELSE
)
3280 oberon_assert_token(ctx
, ELSE
);
3281 oberon_statement_seq(ctx
);
3285 oberon_generate_trap(ctx
, -2);
3288 oberon_generate_label(ctx
, end
);
3289 oberon_assert_token(ctx
, END
);
3293 oberon_statement(oberon_context_t
* ctx
)
3295 oberon_expr_t
* item1
;
3296 oberon_expr_t
* item2
;
3298 if(ctx
-> token
== IDENT
)
3300 item1
= oberon_designator(ctx
);
3301 if(ctx
-> token
== ASSIGN
)
3303 oberon_assert_token(ctx
, ASSIGN
);
3304 item2
= oberon_expr(ctx
);
3305 oberon_assign(ctx
, item2
, item1
);
3309 oberon_opt_proc_parens(ctx
, item1
);
3312 else if(ctx
-> token
== IF
)
3316 oberon_expr_t
* cond
;
3318 els
= oberon_generator_reserve_label(ctx
);
3319 end
= oberon_generator_reserve_label(ctx
);
3321 oberon_assert_token(ctx
, IF
);
3322 cond
= oberon_expr(ctx
);
3323 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3325 oberon_error(ctx
, "condition must be boolean");
3327 oberon_assert_token(ctx
, THEN
);
3328 oberon_generate_branch(ctx
, cond
, false, els
);
3329 oberon_statement_seq(ctx
);
3330 oberon_generate_goto(ctx
, end
);
3331 oberon_generate_label(ctx
, els
);
3333 while(ctx
-> token
== ELSIF
)
3335 els
= oberon_generator_reserve_label(ctx
);
3337 oberon_assert_token(ctx
, ELSIF
);
3338 cond
= oberon_expr(ctx
);
3339 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3341 oberon_error(ctx
, "condition must be boolean");
3343 oberon_assert_token(ctx
, THEN
);
3344 oberon_generate_branch(ctx
, cond
, false, els
);
3345 oberon_statement_seq(ctx
);
3346 oberon_generate_goto(ctx
, end
);
3347 oberon_generate_label(ctx
, els
);
3350 if(ctx
-> token
== ELSE
)
3352 oberon_assert_token(ctx
, ELSE
);
3353 oberon_statement_seq(ctx
);
3356 oberon_generate_label(ctx
, end
);
3357 oberon_assert_token(ctx
, END
);
3359 else if(ctx
-> token
== WHILE
)
3361 gen_label_t
* begin
;
3363 oberon_expr_t
* cond
;
3365 begin
= oberon_generator_reserve_label(ctx
);
3366 end
= oberon_generator_reserve_label(ctx
);
3368 oberon_assert_token(ctx
, WHILE
);
3369 oberon_generate_label(ctx
, begin
);
3370 cond
= oberon_expr(ctx
);
3371 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3373 oberon_error(ctx
, "condition must be boolean");
3375 oberon_generate_branch(ctx
, cond
, false, end
);
3377 oberon_assert_token(ctx
, DO
);
3378 oberon_statement_seq(ctx
);
3379 oberon_generate_goto(ctx
, begin
);
3381 oberon_assert_token(ctx
, END
);
3382 oberon_generate_label(ctx
, end
);
3384 else if(ctx
-> token
== REPEAT
)
3386 gen_label_t
* begin
;
3387 oberon_expr_t
* cond
;
3389 begin
= oberon_generator_reserve_label(ctx
);
3390 oberon_generate_label(ctx
, begin
);
3391 oberon_assert_token(ctx
, REPEAT
);
3393 oberon_statement_seq(ctx
);
3395 oberon_assert_token(ctx
, UNTIL
);
3397 cond
= oberon_expr(ctx
);
3398 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3400 oberon_error(ctx
, "condition must be boolean");
3403 oberon_generate_branch(ctx
, cond
, true, begin
);
3405 else if(ctx
-> token
== FOR
)
3407 oberon_expr_t
* from
;
3408 oberon_expr_t
* index
;
3410 oberon_expr_t
* bound
;
3412 oberon_expr_t
* cond
;
3413 oberon_expr_t
* count
;
3414 gen_label_t
* begin
;
3419 begin
= oberon_generator_reserve_label(ctx
);
3420 end
= oberon_generator_reserve_label(ctx
);
3422 oberon_assert_token(ctx
, FOR
);
3423 iname
= oberon_assert_ident(ctx
);
3424 index
= oberon_ident_item(ctx
, iname
);
3425 oberon_assert_token(ctx
, ASSIGN
);
3426 from
= oberon_expr(ctx
);
3427 oberon_assert_token(ctx
, TO
);
3428 bound
= oberon_make_temp_var_item(ctx
, index
-> result
);
3429 to
= oberon_expr(ctx
);
3430 oberon_assign(ctx
, to
, bound
); // сначала temp
3431 oberon_assign(ctx
, from
, index
); // потом i
3432 if(ctx
-> token
== BY
)
3434 oberon_assert_token(ctx
, BY
);
3435 by
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3439 by
= oberon_make_integer(ctx
, 1);
3442 if(by
-> result
-> class != OBERON_TYPE_INTEGER
)
3444 oberon_error(ctx
, "must be integer");
3447 if(by
-> item
.integer
> 0)
3451 else if(by
-> item
.integer
< 0)
3457 oberon_error(ctx
, "zero step not allowed");
3460 oberon_assert_token(ctx
, DO
);
3461 oberon_generate_label(ctx
, begin
);
3462 cond
= oberon_make_bin_op(ctx
, op
, index
, bound
);
3463 oberon_generate_branch(ctx
, cond
, false, end
);
3464 oberon_statement_seq(ctx
);
3465 count
= oberon_make_bin_op(ctx
, PLUS
, index
, by
);
3466 oberon_assign(ctx
, count
, index
);
3467 oberon_generate_goto(ctx
, begin
);
3468 oberon_generate_label(ctx
, end
);
3469 oberon_assert_token(ctx
, END
);
3471 else if(ctx
-> token
== LOOP
)
3473 gen_label_t
* begin
;
3476 begin
= oberon_generator_reserve_label(ctx
);
3477 end
= oberon_generator_reserve_label(ctx
);
3479 oberon_open_scope(ctx
);
3480 oberon_assert_token(ctx
, LOOP
);
3481 oberon_generate_label(ctx
, begin
);
3482 ctx
-> decl
-> exit_label
= end
;
3483 oberon_statement_seq(ctx
);
3484 oberon_generate_goto(ctx
, begin
);
3485 oberon_generate_label(ctx
, end
);
3486 oberon_assert_token(ctx
, END
);
3487 oberon_close_scope(ctx
-> decl
);
3489 else if(ctx
-> token
== EXIT
)
3491 oberon_assert_token(ctx
, EXIT
);
3492 if(ctx
-> decl
-> exit_label
== NULL
)
3494 oberon_error(ctx
, "not in LOOP-END");
3496 oberon_generate_goto(ctx
, ctx
-> decl
-> exit_label
);
3498 else if(ctx
-> token
== CASE
)
3500 oberon_case_statement(ctx
);
3502 else if(ctx
-> token
== WITH
)
3504 oberon_with_statement(ctx
);
3506 else if(ctx
-> token
== RETURN
)
3508 oberon_assert_token(ctx
, RETURN
);
3509 if(ISEXPR(ctx
-> token
))
3511 oberon_expr_t
* expr
;
3512 expr
= oberon_expr(ctx
);
3513 oberon_make_return(ctx
, expr
);
3517 oberon_make_return(ctx
, NULL
);
3523 oberon_statement_seq(oberon_context_t
* ctx
)
3525 oberon_statement(ctx
);
3526 while(ctx
-> token
== SEMICOLON
)
3528 oberon_assert_token(ctx
, SEMICOLON
);
3529 oberon_statement(ctx
);
3534 oberon_import_module(oberon_context_t
* ctx
, char * alias
, char * name
)
3536 oberon_module_t
* m
= ctx
-> module_list
;
3537 while(m
&& strcmp(m
-> name
, name
) != 0)
3545 code
= ctx
-> import_module(name
);
3548 oberon_error(ctx
, "no such module");
3551 m
= oberon_compile_module(ctx
, code
);
3557 oberon_error(ctx
, "cyclic module import");
3560 oberon_object_t
* ident
;
3561 ident
= oberon_define_object(ctx
-> decl
, alias
, OBERON_CLASS_MODULE
, false, false, false);
3562 ident
-> module
= m
;
3566 oberon_import_decl(oberon_context_t
* ctx
)
3571 alias
= name
= oberon_assert_ident(ctx
);
3572 if(ctx
-> token
== ASSIGN
)
3574 oberon_assert_token(ctx
, ASSIGN
);
3575 name
= oberon_assert_ident(ctx
);
3578 oberon_import_module(ctx
, alias
, name
);
3582 oberon_import_list(oberon_context_t
* ctx
)
3584 oberon_assert_token(ctx
, IMPORT
);
3586 oberon_import_decl(ctx
);
3587 while(ctx
-> token
== COMMA
)
3589 oberon_assert_token(ctx
, COMMA
);
3590 oberon_import_decl(ctx
);
3593 oberon_assert_token(ctx
, SEMICOLON
);
3597 oberon_parse_module(oberon_context_t
* ctx
)
3601 oberon_read_token(ctx
);
3603 oberon_assert_token(ctx
, MODULE
);
3604 name1
= oberon_assert_ident(ctx
);
3605 oberon_assert_token(ctx
, SEMICOLON
);
3606 ctx
-> mod
-> name
= name1
;
3608 oberon_generator_init_module(ctx
, ctx
-> mod
);
3610 if(ctx
-> token
== IMPORT
)
3612 oberon_import_list(ctx
);
3615 oberon_decl_seq(ctx
);
3617 oberon_generate_begin_module(ctx
);
3618 if(ctx
-> token
== BEGIN
)
3620 oberon_assert_token(ctx
, BEGIN
);
3621 oberon_statement_seq(ctx
);
3623 oberon_generate_end_module(ctx
);
3625 oberon_assert_token(ctx
, END
);
3626 name2
= oberon_assert_ident(ctx
);
3627 oberon_expect_token(ctx
, DOT
);
3629 if(strcmp(name1
, name2
) != 0)
3631 oberon_error(ctx
, "module name not matched");
3634 oberon_generator_fini_module(ctx
-> mod
);
3637 // =======================================================================
3639 // =======================================================================
3641 static oberon_expr_t
*
3642 oberon_make_min_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3646 oberon_error(ctx
, "too few arguments");
3651 oberon_error(ctx
, "too mach arguments");
3654 oberon_expr_t
* arg
;
3657 if(!oberon_is_type_expr(arg
))
3659 oberon_error(ctx
, "MIN accept only type");
3662 oberon_expr_t
* expr
;
3663 int bits
= arg
-> result
-> size
* 8;
3664 switch(arg
-> result
-> class)
3666 case OBERON_TYPE_INTEGER
:
3667 expr
= oberon_make_integer(ctx
, -powl(2, bits
- 1));
3669 case OBERON_TYPE_BOOLEAN
:
3670 expr
= oberon_make_boolean(ctx
, false);
3672 case OBERON_TYPE_CHAR
:
3673 expr
= oberon_make_char(ctx
, 0);
3675 case OBERON_TYPE_REAL
:
3676 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (-FLT_MAX
) : (-DBL_MAX
), arg
-> result
);
3678 case OBERON_TYPE_SET
:
3679 expr
= oberon_make_integer(ctx
, 0);
3682 oberon_error(ctx
, "allowed only basic types");
3689 static oberon_expr_t
*
3690 oberon_make_max_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3694 oberon_error(ctx
, "too few arguments");
3699 oberon_error(ctx
, "too mach arguments");
3702 oberon_expr_t
* arg
;
3705 if(!oberon_is_type_expr(arg
))
3707 oberon_error(ctx
, "MAX accept only type");
3710 oberon_expr_t
* expr
;
3711 int bits
= arg
-> result
-> size
* 8;
3712 switch(arg
-> result
-> class)
3714 case OBERON_TYPE_INTEGER
:
3715 expr
= oberon_make_integer(ctx
, powl(2, bits
- 1) - 1);
3717 case OBERON_TYPE_BOOLEAN
:
3718 expr
= oberon_make_boolean(ctx
, true);
3720 case OBERON_TYPE_CHAR
:
3721 expr
= oberon_make_char(ctx
, powl(2, bits
) - 1);
3723 case OBERON_TYPE_REAL
:
3724 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (FLT_MAX
) : (DBL_MAX
), arg
-> result
);
3726 case OBERON_TYPE_SET
:
3727 expr
= oberon_make_integer(ctx
, bits
);
3730 oberon_error(ctx
, "allowed only basic types");
3737 static oberon_expr_t
*
3738 oberon_make_size_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3742 oberon_error(ctx
, "too few arguments");
3747 oberon_error(ctx
, "too mach arguments");
3750 oberon_expr_t
* arg
;
3752 if(!oberon_is_type_expr(arg
))
3754 oberon_error(ctx
, "SIZE accept only type");
3758 oberon_expr_t
* expr
;
3759 oberon_type_t
* type
= arg
-> result
;
3760 switch(type
-> class)
3762 case OBERON_TYPE_INTEGER
:
3763 case OBERON_TYPE_BOOLEAN
:
3764 case OBERON_TYPE_REAL
:
3765 case OBERON_TYPE_CHAR
:
3766 case OBERON_TYPE_SET
:
3767 size
= type
-> size
;
3770 oberon_error(ctx
, "TODO SIZE");
3774 expr
= oberon_make_integer(ctx
, size
);
3778 static oberon_expr_t
*
3779 oberon_make_abs_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3783 oberon_error(ctx
, "too few arguments");
3788 oberon_error(ctx
, "too mach arguments");
3791 oberon_expr_t
* arg
;
3793 oberon_check_src(ctx
, arg
);
3795 if(oberon_is_number_type(arg
-> result
))
3797 oberon_error(ctx
, "ABS accepts only numbers");
3800 oberon_expr_t
* expr
;
3801 if(oberon_is_const(arg
))
3803 if(oberon_is_real_type(arg
-> result
))
3805 double x
= arg
-> item
.real
;
3806 expr
= oberon_make_real(ctx
, fabsl(x
), arg
-> result
);
3810 int64_t x
= arg
-> item
.integer
;
3811 expr
= oberon_make_integer(ctx
, llabs(x
));
3816 expr
= oberon_new_operator(OP_ABS
, arg
-> result
, arg
, NULL
);
3822 oberon_make_inc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3826 oberon_error(ctx
, "too few arguments");
3831 oberon_error(ctx
, "too mach arguments");
3834 oberon_expr_t
* dst
;
3836 oberon_check_dst(ctx
, dst
);
3838 if(!oberon_is_integer_type(dst
-> result
))
3840 oberon_error(ctx
, "expect integer");
3843 oberon_expr_t
* expr
;
3844 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_make_integer(ctx
, 1));
3845 oberon_assign(ctx
, expr
, dst
);
3849 oberon_make_incl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3853 oberon_error(ctx
, "too few arguments");
3858 oberon_error(ctx
, "too mach arguments");
3861 oberon_expr_t
* dst
;
3863 oberon_check_dst(ctx
, dst
);
3865 if(!oberon_is_set_type(dst
-> result
))
3867 oberon_error(ctx
, "expect integer");
3871 x
= list_args
-> next
;
3872 oberon_check_src(ctx
, x
);
3874 if(!oberon_is_integer_type(x
-> result
))
3876 oberon_error(ctx
, "expect integer");
3879 oberon_expr_t
* expr
;
3880 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
3881 oberon_assign(ctx
, expr
, dst
);
3885 oberon_make_excl_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_set_type(dst
-> result
))
3903 oberon_error(ctx
, "expect integer");
3907 x
= list_args
-> next
;
3908 oberon_check_src(ctx
, x
);
3910 if(!oberon_is_integer_type(x
-> result
))
3912 oberon_error(ctx
, "expect integer");
3915 oberon_expr_t
* expr
;
3916 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
3917 oberon_assign(ctx
, expr
, dst
);
3921 oberon_make_dec_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3925 oberon_error(ctx
, "too few arguments");
3930 oberon_error(ctx
, "too mach arguments");
3933 oberon_expr_t
* dst
;
3935 oberon_check_dst(ctx
, dst
);
3937 if(!oberon_is_integer_type(dst
-> result
))
3939 oberon_error(ctx
, "expect integer");
3942 oberon_expr_t
* expr
;
3943 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_make_integer(ctx
, 1));
3944 oberon_assign(ctx
, expr
, dst
);
3948 oberon_make_new_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3952 oberon_error(ctx
, "too few arguments");
3955 oberon_expr_t
* dst
;
3957 oberon_check_dst(ctx
, dst
);
3959 oberon_type_t
* type
;
3960 type
= dst
-> result
;
3962 if(type
-> class != OBERON_TYPE_POINTER
)
3964 oberon_error(ctx
, "not a pointer");
3967 type
= type
-> base
;
3969 oberon_expr_t
* src
;
3970 src
= oberon_new_item(MODE_NEW
, dst
-> result
, 0);
3971 src
-> item
.num_args
= 0;
3972 src
-> item
.args
= NULL
;
3975 if(type
-> class == OBERON_TYPE_ARRAY
)
3977 if(type
-> size
== 0)
3979 oberon_type_t
* x
= type
;
3980 while(x
-> class == OBERON_TYPE_ARRAY
)
3990 if(num_args
< max_args
)
3992 oberon_error(ctx
, "too few arguments");
3995 if(num_args
> max_args
)
3997 oberon_error(ctx
, "too mach arguments");
4000 int num_sizes
= max_args
- 1;
4001 oberon_expr_t
* size_list
= list_args
-> next
;
4003 oberon_expr_t
* arg
= size_list
;
4004 for(int i
= 0; i
< max_args
- 1; i
++)
4006 oberon_check_src(ctx
, arg
);
4007 if(arg
-> result
-> class != OBERON_TYPE_INTEGER
)
4009 oberon_error(ctx
, "size must be integer");
4014 src
-> item
.num_args
= num_sizes
;
4015 src
-> item
.args
= size_list
;
4017 else if(type
-> class != OBERON_TYPE_RECORD
)
4019 oberon_error(ctx
, "oberon_make_new_call: wat");
4022 if(num_args
> max_args
)
4024 oberon_error(ctx
, "too mach arguments");
4027 oberon_assign(ctx
, src
, dst
);
4031 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4035 oberon_error(ctx
, "too few arguments");
4040 oberon_error(ctx
, "too mach arguments");
4043 oberon_expr_t
* src
;
4045 oberon_check_src(ctx
, src
);
4047 oberon_expr_t
* dst
;
4048 dst
= list_args
-> next
;
4049 oberon_check_dst(ctx
, dst
);
4051 if(!oberon_is_string_type(src
-> result
) && !oberon_is_array_of_char_type(src
-> result
))
4053 oberon_error(ctx
, "source must be string or array of char");
4056 if(!oberon_is_array_of_char_type(dst
-> result
))
4058 oberon_error(ctx
, "dst must be array of char");
4061 oberon_generate_copy(ctx
, src
, dst
);
4065 oberon_make_assert_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4069 oberon_error(ctx
, "too few arguments");
4074 oberon_error(ctx
, "too mach arguments");
4077 oberon_expr_t
* cond
;
4079 oberon_check_src(ctx
, cond
);
4081 if(!oberon_is_boolean_type(cond
-> result
))
4083 oberon_error(ctx
, "expected boolean");
4088 oberon_generate_assert(ctx
, cond
);
4092 oberon_expr_t
* num
;
4093 num
= list_args
-> next
;
4094 oberon_check_src(ctx
, num
);
4096 if(!oberon_is_integer_type(num
-> result
))
4098 oberon_error(ctx
, "expected integer");
4101 oberon_check_const(ctx
, num
);
4103 oberon_generate_assert_n(ctx
, cond
, num
-> item
.integer
);
4108 oberon_make_halt_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4112 oberon_error(ctx
, "too few arguments");
4117 oberon_error(ctx
, "too mach arguments");
4120 oberon_expr_t
* num
;
4122 oberon_check_src(ctx
, num
);
4124 if(num
-> result
-> class != OBERON_TYPE_INTEGER
)
4126 oberon_error(ctx
, "expected integer");
4129 oberon_check_const(ctx
, num
);
4131 oberon_generate_halt(ctx
, num
-> item
.integer
);
4134 static oberon_expr_t
*
4135 oberon_make_ash_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4139 oberon_error(ctx
, "too few arguments");
4144 oberon_error(ctx
, "too mach arguments");
4147 oberon_expr_t
* arg1
;
4149 oberon_check_src(ctx
, arg1
);
4150 if(arg1
-> result
-> class != OBERON_TYPE_INTEGER
)
4152 oberon_error(ctx
, "expected integer");
4155 oberon_expr_t
* arg2
;
4156 arg2
= list_args
-> next
;
4157 oberon_check_src(ctx
, arg2
);
4158 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4160 oberon_error(ctx
, "expected integer");
4163 oberon_expr_t
* expr
;
4164 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4166 int64_t x
= arg1
-> item
.integer
;
4167 int64_t y
= arg2
-> item
.integer
;
4168 expr
= oberon_make_integer(ctx
, x
* powl(2, y
));
4172 expr
= oberon_new_operator(OP_ASH
, arg1
-> result
, arg1
, arg2
);
4178 static oberon_expr_t
*
4179 oberon_make_cap_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4183 oberon_error(ctx
, "too few arguments");
4188 oberon_error(ctx
, "too mach arguments");
4191 oberon_expr_t
* arg
;
4193 oberon_check_src(ctx
, arg
);
4195 if(!oberon_is_char_type(arg
-> result
))
4197 oberon_error(ctx
, "expected char");
4200 oberon_expr_t
* expr
;
4201 if(oberon_is_const(arg
))
4203 expr
= oberon_make_char(ctx
, toupper(arg
-> item
.integer
));
4207 expr
= oberon_new_operator(OP_CAP
, arg
-> result
, arg
, NULL
);
4213 static oberon_expr_t
*
4214 oberon_make_chr_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4218 oberon_error(ctx
, "too few arguments");
4223 oberon_error(ctx
, "too mach arguments");
4226 oberon_expr_t
* arg
;
4228 oberon_check_src(ctx
, arg
);
4230 if(!oberon_is_integer_type(arg
-> result
))
4232 oberon_error(ctx
, "expected integer");
4235 oberon_expr_t
* expr
;
4236 if(oberon_is_const(arg
))
4238 expr
= oberon_make_char(ctx
, arg
-> item
.integer
);
4242 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> char_type
);
4247 static oberon_expr_t
*
4248 oberon_make_ord_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4252 oberon_error(ctx
, "too few arguments");
4257 oberon_error(ctx
, "too mach arguments");
4260 oberon_expr_t
* arg
;
4262 oberon_check_src(ctx
, arg
);
4264 if(!oberon_is_char_type(arg
-> result
))
4266 oberon_error(ctx
, "expected char");
4269 oberon_expr_t
* expr
;
4270 if(oberon_is_const(arg
))
4272 expr
= oberon_make_integer(ctx
, arg
-> item
.integer
);
4276 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> int_type
);
4281 static oberon_expr_t
*
4282 oberon_make_entier_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4286 oberon_error(ctx
, "too few arguments");
4291 oberon_error(ctx
, "too mach arguments");
4294 oberon_expr_t
* arg
;
4296 oberon_check_src(ctx
, arg
);
4298 if(!oberon_is_real_type(arg
-> result
))
4300 oberon_error(ctx
, "expected real");
4303 oberon_expr_t
* expr
;
4304 if(oberon_is_const(arg
))
4306 expr
= oberon_make_integer(ctx
, floor(arg
-> item
.real
));
4310 expr
= oberon_new_operator(OP_ENTIER
, ctx
-> int_type
, arg
, NULL
);
4315 static oberon_expr_t
*
4316 oberon_make_odd_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4320 oberon_error(ctx
, "too few arguments");
4325 oberon_error(ctx
, "too mach arguments");
4328 oberon_expr_t
* arg
;
4330 oberon_check_src(ctx
, arg
);
4332 if(!oberon_is_integer_type(arg
-> result
))
4334 oberon_error(ctx
, "expected integer");
4337 oberon_expr_t
* expr
;
4338 expr
= oberon_make_bin_op(ctx
, MOD
, arg
, oberon_make_integer(ctx
, 2));
4339 expr
= oberon_make_bin_op(ctx
, EQUAL
, expr
, oberon_make_integer(ctx
, 1));
4343 static oberon_expr_t
*
4344 oberon_make_short_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4348 oberon_error(ctx
, "too few arguments");
4353 oberon_error(ctx
, "too mach arguments");
4356 oberon_expr_t
* arg
;
4358 oberon_check_src(ctx
, arg
);
4360 if(arg
-> result
-> shorter
== NULL
)
4362 oberon_error(ctx
, "already shorter");
4365 oberon_expr_t
* expr
;
4366 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> shorter
);
4370 static oberon_expr_t
*
4371 oberon_make_long_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4375 oberon_error(ctx
, "too few arguments");
4380 oberon_error(ctx
, "too mach arguments");
4383 oberon_expr_t
* arg
;
4385 oberon_check_src(ctx
, arg
);
4387 if(arg
-> result
-> longer
== NULL
)
4389 oberon_error(ctx
, "already longer");
4392 oberon_expr_t
* expr
;
4393 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> longer
);
4397 static oberon_expr_t
*
4398 oberon_make_len_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4402 oberon_error(ctx
, "too few arguments");
4407 oberon_error(ctx
, "too mach arguments");
4412 oberon_check_src(ctx
, v
);
4414 if(!oberon_is_array_type(v
-> result
))
4416 oberon_error(ctx
, "expected array");
4422 oberon_expr_t
* num
;
4423 num
= list_args
-> next
;
4424 oberon_check_src(ctx
, num
);
4426 if(!oberon_is_integer_type(num
-> result
))
4428 oberon_error(ctx
, "expected integer");
4430 oberon_check_const(ctx
, num
);
4432 n
= num
-> item
.integer
;
4436 oberon_type_t
* arr
= v
-> result
;
4437 while(arr
-> class == OBERON_TYPE_ARRAY
)
4443 if(n
< 0 || n
> dim
)
4445 oberon_error(ctx
, "not in range 0..%i", dim
- 1);
4448 assert(v
-> is_item
);
4450 oberon_expr_t
* expr
;
4451 expr
= oberon_new_item(MODE_LEN
, ctx
-> int_type
, true);
4452 expr
-> item
.parent
= (oberon_item_t
*) v
;
4453 expr
-> item
.integer
= n
;
4458 oberon_new_const(oberon_context_t
* ctx
, char * name
, oberon_expr_t
* expr
)
4460 oberon_object_t
* constant
;
4461 constant
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_CONST
, true, false, false);
4462 oberon_check_const(ctx
, expr
);
4463 constant
-> value
= (oberon_item_t
*) expr
;
4467 register_default_types(oberon_context_t
* ctx
)
4469 ctx
-> notype_type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
4470 oberon_generator_init_type(ctx
, ctx
-> notype_type
);
4472 ctx
-> nil_type
= oberon_new_type_ptr(OBERON_TYPE_NIL
);
4473 oberon_generator_init_type(ctx
, ctx
-> nil_type
);
4475 ctx
-> string_type
= oberon_new_type_string(1);
4476 oberon_generator_init_type(ctx
, ctx
-> string_type
);
4478 ctx
-> bool_type
= oberon_new_type_boolean();
4479 oberon_define_type(ctx
-> world_scope
, "BOOLEAN", ctx
-> bool_type
, 1);
4481 ctx
-> char_type
= oberon_new_type_char(1);
4482 oberon_define_type(ctx
-> world_scope
, "CHAR", ctx
-> char_type
, 1);
4484 ctx
-> byte_type
= oberon_new_type_integer(1);
4485 oberon_define_type(ctx
-> world_scope
, "SHORTINT", ctx
-> byte_type
, 1);
4487 ctx
-> shortint_type
= oberon_new_type_integer(2);
4488 oberon_define_type(ctx
-> world_scope
, "INTEGER", ctx
-> shortint_type
, 1);
4490 ctx
-> int_type
= oberon_new_type_integer(4);
4491 oberon_define_type(ctx
-> world_scope
, "LONGINT", ctx
-> int_type
, 1);
4493 ctx
-> longint_type
= oberon_new_type_integer(8);
4494 oberon_define_type(ctx
-> world_scope
, "HUGEINT", ctx
-> longint_type
, 1);
4496 ctx
-> real_type
= oberon_new_type_real(4);
4497 oberon_define_type(ctx
-> world_scope
, "REAL", ctx
-> real_type
, 1);
4499 ctx
-> longreal_type
= oberon_new_type_real(8);
4500 oberon_define_type(ctx
-> world_scope
, "LONGREAL", ctx
-> longreal_type
, 1);
4502 ctx
-> set_type
= oberon_new_type_set(4);
4503 oberon_define_type(ctx
-> world_scope
, "SET", ctx
-> set_type
, 1);
4507 ctx
-> byte_type
-> shorter
= NULL
;
4508 ctx
-> byte_type
-> longer
= ctx
-> shortint_type
;
4510 ctx
-> shortint_type
-> shorter
= ctx
-> byte_type
;
4511 ctx
-> shortint_type
-> longer
= ctx
-> int_type
;
4513 ctx
-> int_type
-> shorter
= ctx
-> shortint_type
;
4514 ctx
-> int_type
-> longer
= ctx
-> longint_type
;
4516 ctx
-> longint_type
-> shorter
= ctx
-> int_type
;
4517 ctx
-> longint_type
-> longer
= NULL
;
4519 ctx
-> real_type
-> shorter
= NULL
;
4520 ctx
-> real_type
-> longer
= ctx
-> longreal_type
;
4522 ctx
-> longreal_type
-> shorter
= ctx
-> real_type
;
4523 ctx
-> longreal_type
-> longer
= NULL
;
4527 oberon_new_intrinsic(oberon_context_t
* ctx
, char * name
, GenerateFuncCallback f
, GenerateProcCallback p
)
4529 oberon_object_t
* proc
;
4530 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, true, false, false);
4531 proc
-> type
= oberon_new_type_ptr(OBERON_TYPE_PROCEDURE
);
4532 proc
-> type
-> sysproc
= true;
4533 proc
-> type
-> genfunc
= f
;
4534 proc
-> type
-> genproc
= p
;
4538 oberon_create_context(ModuleImportCallback import_module
)
4540 oberon_context_t
* ctx
= GC_MALLOC(sizeof *ctx
);
4541 memset(ctx
, 0, sizeof *ctx
);
4543 oberon_scope_t
* world_scope
;
4544 world_scope
= oberon_open_scope(ctx
);
4545 ctx
-> world_scope
= world_scope
;
4547 ctx
-> import_module
= import_module
;
4549 oberon_generator_init_context(ctx
);
4551 register_default_types(ctx
);
4554 oberon_new_const(ctx
, "TRUE", oberon_make_boolean(ctx
, true));
4555 oberon_new_const(ctx
, "FALSE", oberon_make_boolean(ctx
, false));
4558 oberon_new_intrinsic(ctx
, "ABS", oberon_make_abs_call
, NULL
);
4559 oberon_new_intrinsic(ctx
, "ASH", oberon_make_ash_call
, NULL
);
4560 oberon_new_intrinsic(ctx
, "CAP", oberon_make_cap_call
, NULL
);
4561 oberon_new_intrinsic(ctx
, "CHR", oberon_make_chr_call
, NULL
);
4562 oberon_new_intrinsic(ctx
, "ENTIER", oberon_make_entier_call
, NULL
);
4563 oberon_new_intrinsic(ctx
, "LEN", oberon_make_len_call
, NULL
);
4564 oberon_new_intrinsic(ctx
, "LONG", oberon_make_long_call
, NULL
);
4565 oberon_new_intrinsic(ctx
, "MAX", oberon_make_max_call
, NULL
);
4566 oberon_new_intrinsic(ctx
, "MIN", oberon_make_min_call
, NULL
);
4567 oberon_new_intrinsic(ctx
, "ODD", oberon_make_odd_call
, NULL
);
4568 oberon_new_intrinsic(ctx
, "ORD", oberon_make_ord_call
, NULL
);
4569 oberon_new_intrinsic(ctx
, "SHORT", oberon_make_short_call
, NULL
);
4570 oberon_new_intrinsic(ctx
, "SIZE", oberon_make_size_call
, NULL
);
4573 oberon_new_intrinsic(ctx
, "ASSERT", NULL
, oberon_make_assert_call
);
4574 oberon_new_intrinsic(ctx
, "COPY", NULL
, oberon_make_copy_call
);
4575 oberon_new_intrinsic(ctx
, "DEC", NULL
, oberon_make_dec_call
);
4576 oberon_new_intrinsic(ctx
, "EXCL", NULL
, oberon_make_excl_call
);
4577 oberon_new_intrinsic(ctx
, "HALT", NULL
, oberon_make_halt_call
);
4578 oberon_new_intrinsic(ctx
, "INC", NULL
, oberon_make_inc_call
);
4579 oberon_new_intrinsic(ctx
, "INCL", NULL
, oberon_make_incl_call
);
4580 oberon_new_intrinsic(ctx
, "NEW", NULL
, oberon_make_new_call
);
4586 oberon_destroy_context(oberon_context_t
* ctx
)
4588 oberon_generator_destroy_context(ctx
);
4592 oberon_compile_module(oberon_context_t
* ctx
, const char * newcode
)
4594 const char * code
= ctx
-> code
;
4595 int code_index
= ctx
-> code_index
;
4597 int token
= ctx
-> token
;
4598 char * string
= ctx
-> string
;
4599 int integer
= ctx
-> integer
;
4600 int real
= ctx
-> real
;
4601 bool longmode
= ctx
-> longmode
;
4602 oberon_scope_t
* decl
= ctx
-> decl
;
4603 oberon_module_t
* mod
= ctx
-> mod
;
4605 oberon_scope_t
* module_scope
;
4606 module_scope
= oberon_open_scope(ctx
);
4608 oberon_module_t
* module
;
4609 module
= GC_MALLOC(sizeof *module
);
4610 memset(module
, 0, sizeof *module
);
4611 module
-> decl
= module_scope
;
4612 module
-> next
= ctx
-> module_list
;
4614 ctx
-> mod
= module
;
4615 ctx
-> module_list
= module
;
4617 oberon_init_scaner(ctx
, newcode
);
4618 oberon_parse_module(ctx
);
4620 module
-> ready
= 1;
4623 ctx
-> code_index
= code_index
;
4625 ctx
-> token
= token
;
4626 ctx
-> string
= string
;
4627 ctx
-> integer
= integer
;
4629 ctx
-> longmode
= longmode
;