fbf0c455fabcf926d582592fe5f23c86a726d928
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)
269 static oberon_object_t
*
270 oberon_find_object(oberon_scope_t
* scope
, char * name
, bool check_it
)
272 oberon_object_t
* result
= NULL
;
274 oberon_scope_t
* s
= scope
;
275 while(result
== NULL
&& s
!= NULL
)
277 result
= oberon_find_object_in_list(s
-> list
, name
);
281 if(check_it
&& result
== NULL
)
283 oberon_error(scope
-> ctx
, "undefined ident %s", name
);
289 static oberon_object_t
*
290 oberon_create_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
)
292 oberon_object_t
* newvar
= GC_MALLOC(sizeof *newvar
);
293 memset(newvar
, 0, sizeof *newvar
);
294 newvar
-> name
= name
;
295 newvar
-> class = class;
296 newvar
-> export
= export
;
297 newvar
-> read_only
= read_only
;
298 newvar
-> local
= scope
-> local
;
299 newvar
-> parent
= scope
-> parent
;
300 newvar
-> parent_type
= scope
-> parent_type
;
301 newvar
-> module
= scope
-> ctx
-> mod
;
305 static oberon_object_t
*
306 oberon_define_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
, bool check_upscope
)
310 if(oberon_find_object(scope
-> up
, name
, false))
312 oberon_error(scope
-> ctx
, "already defined");
316 oberon_object_t
* x
= scope
-> list
;
317 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
324 oberon_error(scope
-> ctx
, "already defined");
327 oberon_object_t
* newvar
;
328 newvar
= oberon_create_object(scope
, name
, class, export
, read_only
);
334 // =======================================================================
336 // =======================================================================
339 oberon_get_char(oberon_context_t
* ctx
)
341 if(ctx
-> code
[ctx
-> code_index
])
343 ctx
-> code_index
+= 1;
344 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
349 oberon_init_scaner(oberon_context_t
* ctx
, const char * code
)
352 ctx
-> code_index
= 0;
353 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
357 oberon_read_ident(oberon_context_t
* ctx
)
359 int start
= ctx
-> code_index
;
361 oberon_get_char(ctx
);
362 while(isalnum(ctx
-> c
) || ctx
-> c
== '_')
364 oberon_get_char(ctx
);
367 int end
= ctx
-> code_index
;
369 char * ident
= GC_MALLOC(end
- start
+ 1);
370 memcpy(ident
, &ctx
-> code
[start
], end
- start
);
371 ident
[end
- start
] = 0;
373 ctx
-> string
= ident
;
374 ctx
-> token
= IDENT
;
376 if(strcmp(ident
, "MODULE") == 0)
378 ctx
-> token
= MODULE
;
380 else if(strcmp(ident
, "END") == 0)
384 else if(strcmp(ident
, "VAR") == 0)
388 else if(strcmp(ident
, "BEGIN") == 0)
390 ctx
-> token
= BEGIN
;
392 else if(strcmp(ident
, "OR") == 0)
396 else if(strcmp(ident
, "DIV") == 0)
400 else if(strcmp(ident
, "MOD") == 0)
404 else if(strcmp(ident
, "PROCEDURE") == 0)
406 ctx
-> token
= PROCEDURE
;
408 else if(strcmp(ident
, "RETURN") == 0)
410 ctx
-> token
= RETURN
;
412 else if(strcmp(ident
, "CONST") == 0)
414 ctx
-> token
= CONST
;
416 else if(strcmp(ident
, "TYPE") == 0)
420 else if(strcmp(ident
, "ARRAY") == 0)
422 ctx
-> token
= ARRAY
;
424 else if(strcmp(ident
, "OF") == 0)
428 else if(strcmp(ident
, "RECORD") == 0)
430 ctx
-> token
= RECORD
;
432 else if(strcmp(ident
, "POINTER") == 0)
434 ctx
-> token
= POINTER
;
436 else if(strcmp(ident
, "TO") == 0)
440 else if(strcmp(ident
, "NIL") == 0)
444 else if(strcmp(ident
, "IMPORT") == 0)
446 ctx
-> token
= IMPORT
;
448 else if(strcmp(ident
, "IN") == 0)
452 else if(strcmp(ident
, "IS") == 0)
456 else if(strcmp(ident
, "IF") == 0)
460 else if(strcmp(ident
, "THEN") == 0)
464 else if(strcmp(ident
, "ELSE") == 0)
468 else if(strcmp(ident
, "ELSIF") == 0)
470 ctx
-> token
= ELSIF
;
472 else if(strcmp(ident
, "WHILE") == 0)
474 ctx
-> token
= WHILE
;
476 else if(strcmp(ident
, "DO") == 0)
480 else if(strcmp(ident
, "REPEAT") == 0)
482 ctx
-> token
= REPEAT
;
484 else if(strcmp(ident
, "UNTIL") == 0)
486 ctx
-> token
= UNTIL
;
488 else if(strcmp(ident
, "FOR") == 0)
492 else if(strcmp(ident
, "BY") == 0)
496 else if(strcmp(ident
, "LOOP") == 0)
500 else if(strcmp(ident
, "EXIT") == 0)
504 else if(strcmp(ident
, "CASE") == 0)
508 else if(strcmp(ident
, "WITH") == 0)
514 #define ISHEXDIGIT(x) \
515 (((x) >= '0' && (x) <= '9') || ((x) >= 'A' && (x) <= 'F'))
518 oberon_read_number(oberon_context_t
* ctx
)
531 * mode = 3 == LONGREAL
535 start_i
= ctx
-> code_index
;
537 while(isdigit(ctx
-> c
))
539 oberon_get_char(ctx
);
542 end_i
= ctx
-> code_index
;
544 if(ISHEXDIGIT(ctx
-> c
))
547 while(ISHEXDIGIT(ctx
-> c
))
549 oberon_get_char(ctx
);
552 end_i
= ctx
-> code_index
;
557 oberon_get_char(ctx
);
559 else if(ctx
-> c
== 'X')
562 oberon_get_char(ctx
);
566 oberon_error(ctx
, "invalid hex number");
569 else if(ctx
-> c
== '.')
571 oberon_get_char(ctx
);
574 /* Чит: избегаем конфликта с DOTDOT */
575 ctx
-> code_index
-= 1;
581 while(isdigit(ctx
-> c
))
583 oberon_get_char(ctx
);
586 if(ctx
-> c
== 'E' || ctx
-> c
== 'D')
588 exp_i
= ctx
-> code_index
;
595 oberon_get_char(ctx
);
597 if(ctx
-> c
== '+' || ctx
-> c
== '-')
599 oberon_get_char(ctx
);
602 while(isdigit(ctx
-> c
))
604 oberon_get_char(ctx
);
608 end_i
= ctx
-> code_index
;
616 oberon_get_char(ctx
);
618 else if(ctx
-> c
== 'X')
621 oberon_get_char(ctx
);
625 int len
= end_i
- start_i
;
626 ident
= GC_MALLOC(len
+ 1);
627 memcpy(ident
, &ctx
-> code
[start_i
], len
);
630 ctx
-> longmode
= false;
633 int i
= exp_i
- start_i
;
635 ctx
-> longmode
= true;
641 integer
= atol(ident
);
643 ctx
-> token
= INTEGER
;
646 sscanf(ident
, "%lx", &integer
);
648 ctx
-> token
= INTEGER
;
652 sscanf(ident
, "%lf", &real
);
657 sscanf(ident
, "%lx", &integer
);
662 oberon_error(ctx
, "oberon_read_number: wat");
666 ctx
-> string
= ident
;
667 ctx
-> integer
= integer
;
672 oberon_skip_space(oberon_context_t
* ctx
)
674 while(isspace(ctx
-> c
))
676 oberon_get_char(ctx
);
681 oberon_read_comment(oberon_context_t
* ctx
)
688 oberon_get_char(ctx
);
691 oberon_get_char(ctx
);
695 else if(ctx
-> c
== '*')
697 oberon_get_char(ctx
);
700 oberon_get_char(ctx
);
704 else if(ctx
-> c
== 0)
706 oberon_error(ctx
, "unterminated comment");
710 oberon_get_char(ctx
);
715 static void oberon_read_string(oberon_context_t
* ctx
)
718 oberon_get_char(ctx
);
720 int start
= ctx
-> code_index
;
722 while(ctx
-> c
!= 0 && ctx
-> c
!= c
)
724 oberon_get_char(ctx
);
729 oberon_error(ctx
, "unterminated string");
732 int end
= ctx
-> code_index
;
734 oberon_get_char(ctx
);
736 char * string
= GC_MALLOC(end
- start
+ 1);
737 strncpy(string
, &ctx
-> code
[start
], end
- start
);
738 string
[end
- start
] = 0;
740 ctx
-> token
= STRING
;
741 ctx
-> string
= string
;
742 ctx
-> integer
= string
[0];
745 static void oberon_read_token(oberon_context_t
* ctx
);
748 oberon_read_symbol(oberon_context_t
* ctx
)
757 ctx
-> token
= SEMICOLON
;
758 oberon_get_char(ctx
);
761 ctx
-> token
= COLON
;
762 oberon_get_char(ctx
);
765 ctx
-> token
= ASSIGN
;
766 oberon_get_char(ctx
);
771 oberon_get_char(ctx
);
774 ctx
-> token
= DOTDOT
;
775 oberon_get_char(ctx
);
779 ctx
-> token
= LPAREN
;
780 oberon_get_char(ctx
);
783 oberon_get_char(ctx
);
784 oberon_read_comment(ctx
);
785 oberon_read_token(ctx
);
789 ctx
-> token
= RPAREN
;
790 oberon_get_char(ctx
);
793 ctx
-> token
= EQUAL
;
794 oberon_get_char(ctx
);
798 oberon_get_char(ctx
);
802 oberon_get_char(ctx
);
806 oberon_get_char(ctx
);
810 ctx
-> token
= GREAT
;
811 oberon_get_char(ctx
);
815 oberon_get_char(ctx
);
820 oberon_get_char(ctx
);
823 ctx
-> token
= MINUS
;
824 oberon_get_char(ctx
);
828 oberon_get_char(ctx
);
831 oberon_get_char(ctx
);
832 oberon_error(ctx
, "unstarted comment");
836 ctx
-> token
= SLASH
;
837 oberon_get_char(ctx
);
841 oberon_get_char(ctx
);
845 oberon_get_char(ctx
);
848 ctx
-> token
= COMMA
;
849 oberon_get_char(ctx
);
852 ctx
-> token
= LBRACK
;
853 oberon_get_char(ctx
);
856 ctx
-> token
= RBRACK
;
857 oberon_get_char(ctx
);
860 ctx
-> token
= UPARROW
;
861 oberon_get_char(ctx
);
864 oberon_read_string(ctx
);
867 oberon_read_string(ctx
);
870 ctx
-> token
= LBRACE
;
871 oberon_get_char(ctx
);
874 ctx
-> token
= RBRACE
;
875 oberon_get_char(ctx
);
879 oberon_get_char(ctx
);
882 oberon_error(ctx
, "invalid char %c", ctx
-> c
);
888 oberon_read_token(oberon_context_t
* ctx
)
890 oberon_skip_space(ctx
);
893 if(isalpha(c
) || c
== '_')
895 oberon_read_ident(ctx
);
899 oberon_read_number(ctx
);
903 oberon_read_symbol(ctx
);
907 // =======================================================================
909 // =======================================================================
911 static void oberon_expect_token(oberon_context_t
* ctx
, int token
);
912 static oberon_expr_t
* oberon_expr(oberon_context_t
* ctx
);
913 static void oberon_assert_token(oberon_context_t
* ctx
, int token
);
914 static char * oberon_assert_ident(oberon_context_t
* ctx
);
915 static void oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
);
916 static oberon_item_t
* oberon_const_expr(oberon_context_t
* ctx
);
917 static oberon_expr_t
* oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
);
918 static bool oberon_is_const(oberon_expr_t
* expr
);
920 static oberon_expr_t
*
921 oberon_make_unary_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
)
923 oberon_expr_t
* expr
;
924 oberon_type_t
* result
;
926 result
= a
-> result
;
930 if(result
-> class == OBERON_TYPE_SET
)
932 if(oberon_is_const(a
))
934 expr
= oberon_make_set(ctx
, ~(a
-> item
.integer
));
938 expr
= oberon_new_operator(OP_COMPLEMENTATION
, result
, a
, NULL
);
941 else if(result
-> class == OBERON_TYPE_INTEGER
)
943 if(oberon_is_const(a
))
945 expr
= oberon_make_integer(ctx
, -(a
-> item
.integer
));
949 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
952 else if(result
-> class == OBERON_TYPE_REAL
)
954 if(oberon_is_const(a
))
956 expr
= oberon_make_real_typed(ctx
, -(a
-> item
.real
), result
);
960 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
965 oberon_error(ctx
, "incompatible operator type");
968 else if(token
== NOT
)
970 if(result
-> class != OBERON_TYPE_BOOLEAN
)
972 oberon_error(ctx
, "incompatible operator type");
975 if(oberon_is_const(a
))
977 expr
= oberon_make_boolean(ctx
, !(a
-> item
.integer
));
981 expr
= oberon_new_operator(OP_LOGIC_NOT
, result
, a
, NULL
);
986 oberon_error(ctx
, "oberon_make_unary_op: wat");
993 oberon_expr_list(oberon_context_t
* ctx
, int * num_expr
, oberon_expr_t
** first
, int const_expr
)
995 oberon_expr_t
* last
;
1000 *first
= last
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1004 *first
= last
= oberon_expr(ctx
);
1006 while(ctx
-> token
== COMMA
)
1008 oberon_assert_token(ctx
, COMMA
);
1009 oberon_expr_t
* current
;
1013 current
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1017 current
= oberon_expr(ctx
);
1020 last
-> next
= current
;
1026 static oberon_expr_t
*
1027 oberon_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1029 oberon_expr_t
* cast
;
1031 if((oberon_is_char_type(pref
) && oberon_is_const_string(expr
) && strlen(expr
-> item
.string
) == 1))
1033 /* Автоматически преобразуем строку единичного размера в символ */
1034 cast
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
1035 cast
-> item
.integer
= expr
-> item
.string
[0];
1037 else if(!oberon_is_some_types(expr
-> result
, pref
))
1039 cast
= oberon_new_operator(OP_CAST
, pref
, expr
, NULL
);
1050 oberon_check_dst(oberon_context_t
* ctx
, oberon_expr_t
* dst
)
1052 if(dst
-> read_only
)
1054 oberon_error(ctx
, "read-only destination");
1057 if(dst
-> is_item
== false)
1059 oberon_error(ctx
, "not variable");
1062 switch(dst
-> item
.mode
)
1073 oberon_error(ctx
, "not variable");
1079 oberon_check_src(oberon_context_t
* ctx
, oberon_expr_t
* src
)
1083 if(src
-> item
.mode
== MODE_TYPE
)
1085 oberon_error(ctx
, "not variable");
1091 oberon_autocast_call(oberon_context_t
* ctx
, oberon_item_t
* desig
)
1093 if(desig
-> mode
!= MODE_CALL
)
1095 oberon_error(ctx
, "expected mode CALL");
1098 oberon_type_t
* fn
= desig
-> parent
-> result
;
1099 int num_args
= desig
-> num_args
;
1100 int num_decl
= fn
-> num_decl
;
1102 if(num_args
< num_decl
)
1104 oberon_error(ctx
, "too few arguments");
1106 else if(num_args
> num_decl
)
1108 oberon_error(ctx
, "too many arguments");
1111 /* Делаем проверку на запись и делаем автокаст */
1112 oberon_expr_t
* casted
[num_args
];
1113 oberon_expr_t
* arg
= desig
-> args
;
1114 oberon_object_t
* param
= fn
-> decl
;
1115 for(int i
= 0; i
< num_args
; i
++)
1117 if(param
-> class == OBERON_CLASS_VAR_PARAM
)
1119 oberon_check_dst(ctx
, arg
);
1120 if(!oberon_is_compatible_arrays(param
, arg
))
1122 oberon_check_compatible_var_param(ctx
, param
-> type
, arg
-> result
);
1125 //casted[i] = oberon_cast_expr(ctx, arg, param -> type);
1129 oberon_check_src(ctx
, arg
);
1130 if(!oberon_is_compatible_arrays(param
, arg
))
1132 oberon_check_assignment_compatible(ctx
, arg
, param
-> type
);
1134 casted
[i
] = oberon_cast_expr(ctx
, arg
, param
-> type
);
1138 param
= param
-> next
;
1141 /* Создаём новый список выражений */
1145 for(int i
= 0; i
< num_args
- 1; i
++)
1147 casted
[i
] -> next
= casted
[i
+ 1];
1149 desig
-> args
= arg
;
1153 static oberon_expr_t
*
1154 oberon_make_call_func(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1156 oberon_type_t
* signature
= item
-> result
;
1157 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1159 oberon_error(ctx
, "not a procedure");
1162 oberon_expr_t
* call
;
1164 if(signature
-> sysproc
)
1166 if(signature
-> genfunc
== NULL
)
1168 oberon_error(ctx
, "not a function-procedure");
1171 call
= signature
-> genfunc(ctx
, num_args
, list_args
);
1175 if(signature
-> base
-> class == OBERON_TYPE_NOTYPE
)
1177 oberon_error(ctx
, "attempt to call procedure in expression");
1180 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1181 call
-> item
.parent
= item
;
1182 call
-> item
.num_args
= num_args
;
1183 call
-> item
.args
= list_args
;
1184 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1191 oberon_make_call_proc(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1193 oberon_type_t
* signature
= item
-> result
;
1194 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1196 oberon_error(ctx
, "not a procedure");
1199 oberon_expr_t
* call
;
1201 if(signature
-> sysproc
)
1203 if(signature
-> genproc
== NULL
)
1205 oberon_error(ctx
, "not a procedure");
1208 signature
-> genproc(ctx
, num_args
, list_args
);
1212 if(signature
-> base
-> class != OBERON_TYPE_NOTYPE
)
1214 oberon_error(ctx
, "attempt to call function as non-typed procedure");
1217 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1218 call
-> item
.parent
= item
;
1219 call
-> item
.num_args
= num_args
;
1220 call
-> item
.args
= list_args
;
1221 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1222 oberon_generate_call_proc(ctx
, call
);
1230 || ((x) == INTEGER) \
1233 || ((x) == STRING) \
1235 || ((x) == LPAREN) \
1238 static oberon_expr_t
*
1239 oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1241 if(expr
-> result
-> class != OBERON_TYPE_POINTER
)
1243 oberon_error(ctx
, "not a pointer");
1246 assert(expr
-> is_item
);
1248 oberon_expr_t
* selector
;
1249 selector
= oberon_new_item(MODE_DEREF
, expr
-> result
-> base
, false);
1250 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1255 static oberon_expr_t
*
1256 oberon_make_array_selector(oberon_context_t
* ctx
, oberon_expr_t
* desig
, oberon_expr_t
* index
)
1258 if(desig
-> result
-> class == OBERON_TYPE_POINTER
)
1260 desig
= oberno_make_dereferencing(ctx
, desig
);
1263 assert(desig
-> is_item
);
1265 if(desig
-> result
-> class != OBERON_TYPE_ARRAY
)
1267 oberon_error(ctx
, "not array");
1270 oberon_type_t
* base
;
1271 base
= desig
-> result
-> base
;
1273 if(index
-> result
-> class != OBERON_TYPE_INTEGER
)
1275 oberon_error(ctx
, "index must be integer");
1278 // Статическая проверка границ массива
1279 if(desig
-> result
-> size
!= 0)
1281 if(index
-> is_item
)
1283 if(index
-> item
.mode
== MODE_INTEGER
)
1285 int arr_size
= desig
-> result
-> size
;
1286 int index_int
= index
-> item
.integer
;
1287 if(index_int
< 0 || index_int
> arr_size
- 1)
1289 oberon_error(ctx
, "not in range (dimension size 0..%i)", arr_size
- 1);
1295 oberon_expr_t
* selector
;
1296 selector
= oberon_new_item(MODE_INDEX
, base
, desig
-> read_only
);
1297 selector
-> item
.parent
= (oberon_item_t
*) desig
;
1298 selector
-> item
.num_args
= 1;
1299 selector
-> item
.args
= index
;
1304 static oberon_expr_t
*
1305 oberon_make_record_selector(oberon_context_t
* ctx
, oberon_expr_t
* expr
, char * name
)
1307 if(expr
-> result
-> class == OBERON_TYPE_POINTER
)
1309 expr
= oberno_make_dereferencing(ctx
, expr
);
1312 assert(expr
-> is_item
);
1314 if(expr
-> result
-> class != OBERON_TYPE_RECORD
)
1316 oberon_error(ctx
, "not record");
1319 oberon_type_t
* rec
= expr
-> result
;
1321 oberon_object_t
* field
;
1322 field
= oberon_find_object(rec
-> scope
, name
, true);
1324 if(field
-> export
== 0)
1326 if(field
-> module
!= ctx
-> mod
)
1328 oberon_error(ctx
, "field not exported");
1332 int read_only
= expr
-> read_only
;
1333 if(field
-> read_only
)
1335 if(field
-> module
!= ctx
-> mod
)
1341 oberon_expr_t
* selector
;
1342 selector
= oberon_new_item(MODE_FIELD
, field
-> type
, read_only
);
1343 selector
-> item
.var
= field
;
1344 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1349 #define ISSELECTOR(x) \
1352 || ((x) == UPARROW) \
1355 static oberon_object_t
*
1356 oberon_qualident(oberon_context_t
* ctx
, char ** xname
, int check
)
1359 oberon_object_t
* x
;
1361 name
= oberon_assert_ident(ctx
);
1362 x
= oberon_find_object(ctx
-> decl
, name
, check
);
1366 if(x
-> class == OBERON_CLASS_MODULE
)
1368 oberon_assert_token(ctx
, DOT
);
1369 name
= oberon_assert_ident(ctx
);
1370 /* Наличие объектов в левых модулях всегда проверяется */
1371 x
= oberon_find_object(x
-> module
-> decl
, name
, 1);
1373 if(x
-> export
== 0)
1375 oberon_error(ctx
, "not exported");
1388 static oberon_expr_t
*
1389 oberon_ident_item(oberon_context_t
* ctx
, char * name
)
1392 oberon_object_t
* x
;
1393 oberon_expr_t
* expr
;
1395 x
= oberon_find_object(ctx
-> decl
, name
, true);
1398 if(x
-> class == OBERON_CLASS_CONST
|| x
-> class == OBERON_CLASS_PROC
)
1403 expr
= oberon_new_item(MODE_VAR
, x
-> type
, read_only
);
1404 expr
-> item
.var
= x
;
1408 static oberon_expr_t
*
1409 oberon_qualident_expr(oberon_context_t
* ctx
)
1411 oberon_object_t
* var
;
1412 oberon_expr_t
* expr
;
1414 var
= oberon_qualident(ctx
, NULL
, 1);
1417 if(var
-> read_only
)
1419 if(var
-> module
!= ctx
-> mod
)
1425 switch(var
-> class)
1427 case OBERON_CLASS_CONST
:
1429 expr
= (oberon_expr_t
*) var
-> value
;
1431 case OBERON_CLASS_TYPE
:
1432 expr
= oberon_new_item(MODE_TYPE
, var
-> type
, read_only
);
1434 case OBERON_CLASS_VAR
:
1435 case OBERON_CLASS_VAR_PARAM
:
1436 case OBERON_CLASS_PARAM
:
1437 expr
= oberon_new_item(MODE_VAR
, var
-> type
, read_only
);
1439 case OBERON_CLASS_PROC
:
1440 expr
= oberon_new_item(MODE_VAR
, var
-> type
, true);
1443 oberon_error(ctx
, "invalid designator");
1447 expr
-> item
.var
= var
;
1452 static oberon_expr_t
*
1453 oberon_designator(oberon_context_t
* ctx
)
1456 oberon_expr_t
* expr
;
1457 oberon_object_t
* objtype
;
1459 expr
= oberon_qualident_expr(ctx
);
1461 while(expr
-> result
-> class != OBERON_TYPE_PROCEDURE
&& ISSELECTOR(ctx
-> token
))
1463 switch(ctx
-> token
)
1466 oberon_assert_token(ctx
, DOT
);
1467 name
= oberon_assert_ident(ctx
);
1468 expr
= oberon_make_record_selector(ctx
, expr
, name
);
1471 oberon_assert_token(ctx
, LBRACK
);
1472 int num_indexes
= 0;
1473 oberon_expr_t
* indexes
= NULL
;
1474 oberon_expr_list(ctx
, &num_indexes
, &indexes
, 0);
1475 oberon_assert_token(ctx
, RBRACK
);
1477 for(int i
= 0; i
< num_indexes
; i
++)
1479 expr
= oberon_make_array_selector(ctx
, expr
, indexes
);
1480 indexes
= indexes
-> next
;
1484 oberon_assert_token(ctx
, UPARROW
);
1485 expr
= oberno_make_dereferencing(ctx
, expr
);
1488 oberon_assert_token(ctx
, LPAREN
);
1489 objtype
= oberon_qualident(ctx
, NULL
, true);
1490 oberon_assert_token(ctx
, RPAREN
);
1491 oberon_check_extension_of(ctx
, expr
-> result
, objtype
-> type
);
1492 expr
= oberon_cast_expr(ctx
, expr
, objtype
-> type
);
1495 oberon_error(ctx
, "oberon_designator: wat");
1503 static oberon_expr_t
*
1504 oberon_opt_func_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1506 /* Если есть скобки - значит вызов. Если нет, то передаём указатель. */
1507 if(ctx
-> token
== LPAREN
)
1509 oberon_assert_token(ctx
, LPAREN
);
1512 oberon_expr_t
* arguments
= NULL
;
1514 if(ISEXPR(ctx
-> token
))
1516 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1519 assert(expr
-> is_item
== 1);
1520 expr
= oberon_make_call_func(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1522 oberon_assert_token(ctx
, RPAREN
);
1529 oberon_opt_proc_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1531 assert(expr
-> is_item
);
1534 oberon_expr_t
* arguments
= NULL
;
1536 if(ctx
-> token
== LPAREN
)
1538 oberon_assert_token(ctx
, LPAREN
);
1540 if(ISEXPR(ctx
-> token
))
1542 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1545 oberon_assert_token(ctx
, RPAREN
);
1548 /* Вызов происходит даже без скобок */
1549 oberon_make_call_proc(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1552 static oberon_expr_t
*
1553 oberon_element(oberon_context_t
* ctx
)
1558 e1
= oberon_expr(ctx
);
1559 oberon_check_src(ctx
, e1
);
1560 if(e1
-> result
-> class != OBERON_TYPE_INTEGER
)
1562 oberon_error(ctx
, "expected integer");
1566 if(ctx
-> token
== DOTDOT
)
1568 oberon_assert_token(ctx
, DOTDOT
);
1569 e2
= oberon_expr(ctx
);
1570 oberon_check_src(ctx
, e2
);
1571 if(e2
-> result
-> class != OBERON_TYPE_INTEGER
)
1573 oberon_error(ctx
, "expected integer");
1577 oberon_expr_t
* set
;
1578 if(e2
== NULL
&& oberon_is_const(e1
))
1580 set
= oberon_make_set_index(ctx
, e1
-> item
.integer
);
1582 else if(e2
!= NULL
&& oberon_is_const(e1
) && oberon_is_const(e2
))
1584 set
= oberon_make_set_range(ctx
, e1
-> item
.integer
, e2
-> item
.integer
);
1588 set
= oberon_new_operator(OP_RANGE
, ctx
-> set_type
, e1
, e2
);
1593 static oberon_expr_t
*
1594 oberon_make_set_union(oberon_context_t
* ctx
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1596 if(oberon_is_const(a
) && oberon_is_const(b
))
1598 return oberon_make_set(ctx
, (a
-> item
.integer
| b
-> item
.integer
));
1602 return oberon_new_operator(OP_UNION
, ctx
-> set_type
, a
, b
);
1606 static oberon_expr_t
*
1607 oberon_set(oberon_context_t
* ctx
)
1609 oberon_expr_t
* set
;
1610 oberon_expr_t
* elements
;
1611 set
= oberon_make_set(ctx
, 0);
1613 oberon_assert_token(ctx
, LBRACE
);
1614 if(ISEXPR(ctx
-> token
))
1616 elements
= oberon_element(ctx
);
1617 set
= oberon_make_set_union(ctx
, set
, elements
);
1618 while(ctx
-> token
== COMMA
)
1620 oberon_assert_token(ctx
, COMMA
);
1621 elements
= oberon_element(ctx
);
1622 set
= oberon_make_set_union(ctx
, set
, elements
);
1625 oberon_assert_token(ctx
, RBRACE
);
1630 static oberon_expr_t
*
1631 oberon_factor(oberon_context_t
* ctx
)
1633 oberon_expr_t
* expr
;
1634 oberon_type_t
* result
;
1636 switch(ctx
-> token
)
1639 expr
= oberon_designator(ctx
);
1640 expr
= oberon_opt_func_parens(ctx
, expr
);
1643 expr
= oberon_make_integer(ctx
, ctx
-> integer
);
1644 oberon_assert_token(ctx
, INTEGER
);
1647 result
= ctx
-> char_type
;
1648 expr
= oberon_new_item(MODE_CHAR
, result
, true);
1649 expr
-> item
.integer
= ctx
-> integer
;
1650 oberon_assert_token(ctx
, CHAR
);
1653 result
= ctx
-> string_type
;
1654 expr
= oberon_new_item(MODE_STRING
, result
, true);
1655 expr
-> item
.string
= ctx
-> string
;
1656 oberon_assert_token(ctx
, STRING
);
1659 expr
= oberon_make_real(ctx
, ctx
-> real
, ctx
-> longmode
);
1660 oberon_assert_token(ctx
, REAL
);
1663 expr
= oberon_set(ctx
);
1666 oberon_assert_token(ctx
, LPAREN
);
1667 expr
= oberon_expr(ctx
);
1668 oberon_assert_token(ctx
, RPAREN
);
1671 oberon_assert_token(ctx
, NOT
);
1672 expr
= oberon_factor(ctx
);
1673 expr
= oberon_make_unary_op(ctx
, NOT
, expr
);
1676 oberon_assert_token(ctx
, NIL
);
1677 expr
= oberon_new_item(MODE_NIL
, ctx
-> nil_type
, true);
1680 oberon_error(ctx
, "invalid expression");
1686 static oberon_expr_t
*
1687 oberon_make_bin_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1689 oberon_expr_t
* expr
;
1690 oberon_type_t
* result
;
1692 oberon_check_compatible_bin_expr_types(ctx
, token
, a
-> result
, b
-> result
);
1693 oberon_check_src(ctx
, a
);
1696 oberon_check_src(ctx
, b
);
1701 if(oberon_is_const(a
) && oberon_is_const(b
))
1703 expr
= oberon_make_boolean(ctx
, (1 << a
-> item
.integer
) & b
-> item
.integer
);
1707 expr
= oberon_new_operator(OP_IN
, ctx
-> bool_type
, a
, b
);
1710 else if(token
== IS
)
1712 oberon_check_type_expr(ctx
, b
);
1713 expr
= oberon_new_operator(OP_IS
, ctx
-> bool_type
, a
, b
);
1715 else if((token
>= EQUAL
&& token
<= GEQ
) || token
== OR
|| token
== AND
)
1717 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1719 if(oberon_is_const(a
) && oberon_is_const(b
)
1720 && (oberon_is_real_type(result
) || oberon_is_integer_type(result
)))
1722 if(oberon_is_real_type(result
))
1724 double x
= a
-> item
.real
;
1725 double y
= b
-> item
.real
;
1728 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1729 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1730 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1731 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1732 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1733 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1734 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1735 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1736 default: assert(0); break;
1739 else if(oberon_is_integer_type(result
))
1741 int64_t x
= a
-> item
.integer
;
1742 int64_t y
= b
-> item
.integer
;
1745 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1746 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1747 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1748 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1749 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1750 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1751 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1752 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1753 default: assert(0); break;
1763 a
= oberon_cast_expr(ctx
, a
, result
);
1764 b
= oberon_cast_expr(ctx
, b
, result
);
1765 result
= ctx
-> bool_type
;
1768 case EQUAL
: expr
= oberon_new_operator(OP_EQ
, result
, a
, b
); break;
1769 case NEQ
: expr
= oberon_new_operator(OP_NEQ
, result
, a
, b
); break;
1770 case LESS
: expr
= oberon_new_operator(OP_LSS
, result
, a
, b
); break;
1771 case LEQ
: expr
= oberon_new_operator(OP_LEQ
, result
, a
, b
); break;
1772 case GREAT
: expr
= oberon_new_operator(OP_GRT
, result
, a
, b
); break;
1773 case GEQ
: expr
= oberon_new_operator(OP_GEQ
, result
, a
, b
); break;
1774 case OR
: expr
= oberon_new_operator(OP_LOGIC_OR
, result
, a
, b
); break;
1775 case AND
: expr
= oberon_new_operator(OP_LOGIC_AND
, result
, a
, b
); break;
1776 default: assert(0); break;
1780 else if(token
== SLASH
)
1782 if(oberon_is_set_type(a
-> result
) && oberon_is_set_type(b
-> result
))
1784 if(oberon_is_const(a
) && oberon_is_const(b
))
1786 int64_t x
= a
-> item
.integer
;
1787 int64_t y
= b
-> item
.integer
;
1788 expr
= oberon_make_set(ctx
, x
^ y
);
1792 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1793 a
= oberon_cast_expr(ctx
, a
, result
);
1794 b
= oberon_cast_expr(ctx
, b
, result
);
1795 expr
= oberon_new_operator(OP_SYM_DIFFERENCE
, result
, a
, b
);
1800 result
= oberon_get_longer_real_type(ctx
, a
-> result
, b
-> result
);
1801 if(oberon_is_const(a
) && oberon_is_const(b
))
1803 double x
= a
-> item
.real
;
1804 double y
= b
-> item
.real
;
1805 expr
= oberon_make_real_typed(ctx
, x
/ y
, result
);
1809 a
= oberon_cast_expr(ctx
, a
, result
);
1810 b
= oberon_cast_expr(ctx
, b
, result
);
1811 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
1817 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1819 if(oberon_is_const(a
) && oberon_is_const(b
))
1821 if(oberon_is_set_type(result
))
1823 int64_t x
= a
-> item
.integer
;
1824 int64_t y
= b
-> item
.integer
;
1827 case PLUS
: expr
= oberon_make_set(ctx
, x
| y
); break;
1828 case MINUS
: expr
= oberon_make_set(ctx
, x
& ~y
); break;
1829 case STAR
: expr
= oberon_make_set(ctx
, x
& y
); break;
1830 default: assert(0); break;
1833 if(oberon_is_real_type(result
))
1835 double x
= a
-> item
.real
;
1836 double y
= b
-> item
.real
;
1839 case PLUS
: expr
= oberon_make_real_typed(ctx
, x
+ y
, result
); break;
1840 case MINUS
: expr
= oberon_make_real_typed(ctx
, x
- y
, result
); break;
1841 case STAR
: expr
= oberon_make_real_typed(ctx
, x
* y
, result
); break;
1842 default: assert(0); break;
1845 else if(oberon_is_integer_type(result
))
1847 int64_t x
= a
-> item
.integer
;
1848 int64_t y
= b
-> item
.integer
;
1851 case PLUS
: expr
= oberon_make_integer(ctx
, x
+ y
); break;
1852 case MINUS
: expr
= oberon_make_integer(ctx
, x
- y
); break;
1853 case STAR
: expr
= oberon_make_integer(ctx
, x
* y
); break;
1854 case DIV
: expr
= oberon_make_integer(ctx
, x
/ y
); break;
1855 case MOD
: expr
= oberon_make_integer(ctx
, x
% y
); break;
1856 default: assert(0); break;
1866 a
= oberon_cast_expr(ctx
, a
, result
);
1867 b
= oberon_cast_expr(ctx
, b
, result
);
1870 if(oberon_is_set_type(result
))
1875 expr
= oberon_new_operator(OP_UNION
, result
, a
, b
);
1878 expr
= oberon_new_operator(OP_DIFFERENCE
, result
, a
, b
);
1881 expr
= oberon_new_operator(OP_INTERSECTION
, result
, a
, b
);
1888 else if(oberon_is_number_type(result
))
1893 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
1896 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
1899 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
1916 #define ISMULOP(x) \
1917 ((x) >= STAR && (x) <= AND)
1919 static oberon_expr_t
*
1920 oberon_term_expr(oberon_context_t
* ctx
)
1922 oberon_expr_t
* expr
;
1924 expr
= oberon_factor(ctx
);
1925 while(ISMULOP(ctx
-> token
))
1927 int token
= ctx
-> token
;
1928 oberon_read_token(ctx
);
1930 oberon_expr_t
* inter
= oberon_factor(ctx
);
1931 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
1937 #define ISADDOP(x) \
1938 ((x) >= PLUS && (x) <= OR)
1940 static oberon_expr_t
*
1941 oberon_simple_expr(oberon_context_t
* ctx
)
1943 oberon_expr_t
* expr
;
1946 if(ctx
-> token
== PLUS
)
1949 oberon_assert_token(ctx
, PLUS
);
1951 else if(ctx
-> token
== MINUS
)
1954 oberon_assert_token(ctx
, MINUS
);
1957 expr
= oberon_term_expr(ctx
);
1959 while(ISADDOP(ctx
-> token
))
1961 int token
= ctx
-> token
;
1962 oberon_read_token(ctx
);
1964 oberon_expr_t
* inter
= oberon_term_expr(ctx
);
1965 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
1970 expr
= oberon_make_unary_op(ctx
, MINUS
, expr
);
1976 #define ISRELATION(x) \
1977 ((x) >= EQUAL && (x) <= IS)
1979 static oberon_expr_t
*
1980 oberon_expr(oberon_context_t
* ctx
)
1982 oberon_expr_t
* expr
;
1984 expr
= oberon_simple_expr(ctx
);
1985 while(ISRELATION(ctx
-> token
))
1987 int token
= ctx
-> token
;
1988 oberon_read_token(ctx
);
1990 oberon_expr_t
* inter
= oberon_simple_expr(ctx
);
1991 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
1998 oberon_is_const(oberon_expr_t
* expr
)
2000 if(expr
-> is_item
== false)
2005 switch(expr
-> item
.mode
)
2026 oberon_check_const(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2028 if(!oberon_is_const(expr
))
2030 oberon_error(ctx
, "const expression are required");
2034 static oberon_item_t
*
2035 oberon_const_expr(oberon_context_t
* ctx
)
2037 oberon_expr_t
* expr
;
2038 expr
= oberon_expr(ctx
);
2039 oberon_check_const(ctx
, expr
);
2040 return (oberon_item_t
*) expr
;
2043 // =======================================================================
2045 // =======================================================================
2047 static void oberon_decl_seq(oberon_context_t
* ctx
);
2048 static void oberon_statement_seq(oberon_context_t
* ctx
);
2049 static void oberon_initialize_decl(oberon_context_t
* ctx
);
2052 oberon_expect_token(oberon_context_t
* ctx
, int token
)
2054 if(ctx
-> token
!= token
)
2056 oberon_error(ctx
, "unexpected token %i (%i)", ctx
-> token
, token
);
2061 oberon_assert_token(oberon_context_t
* ctx
, int token
)
2063 oberon_expect_token(ctx
, token
);
2064 oberon_read_token(ctx
);
2068 oberon_assert_ident(oberon_context_t
* ctx
)
2070 oberon_expect_token(ctx
, IDENT
);
2071 char * ident
= ctx
-> string
;
2072 oberon_read_token(ctx
);
2077 oberon_def(oberon_context_t
* ctx
, int * export
, int * read_only
)
2079 switch(ctx
-> token
)
2082 oberon_assert_token(ctx
, STAR
);
2087 oberon_assert_token(ctx
, MINUS
);
2098 static oberon_object_t
*
2099 oberon_ident_def(oberon_context_t
* ctx
, int class, bool check_upscope
)
2104 oberon_object_t
* x
;
2106 name
= oberon_assert_ident(ctx
);
2107 oberon_def(ctx
, &export
, &read_only
);
2109 x
= oberon_define_object(ctx
-> decl
, name
, class, export
, read_only
, check_upscope
);
2114 oberon_ident_list(oberon_context_t
* ctx
, int class, bool check_upscope
, int * num
, oberon_object_t
** list
)
2117 *list
= oberon_ident_def(ctx
, class, check_upscope
);
2118 while(ctx
-> token
== COMMA
)
2120 oberon_assert_token(ctx
, COMMA
);
2121 oberon_ident_def(ctx
, class, check_upscope
);
2127 oberon_var_decl(oberon_context_t
* ctx
)
2130 oberon_object_t
* list
;
2131 oberon_type_t
* type
;
2132 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2134 oberon_ident_list(ctx
, OBERON_CLASS_VAR
, false, &num
, &list
);
2135 oberon_assert_token(ctx
, COLON
);
2136 oberon_type(ctx
, &type
);
2138 oberon_object_t
* var
= list
;
2139 for(int i
= 0; i
< num
; i
++)
2146 static oberon_object_t
*
2147 oberon_fp_section(oberon_context_t
* ctx
, int * num_decl
)
2149 int class = OBERON_CLASS_PARAM
;
2150 if(ctx
-> token
== VAR
)
2152 oberon_read_token(ctx
);
2153 class = OBERON_CLASS_VAR_PARAM
;
2157 oberon_object_t
* list
;
2158 oberon_ident_list(ctx
, class, false, &num
, &list
);
2160 oberon_assert_token(ctx
, COLON
);
2162 oberon_type_t
* type
;
2163 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2164 oberon_type(ctx
, &type
);
2166 oberon_object_t
* param
= list
;
2167 for(int i
= 0; i
< num
; i
++)
2169 param
-> type
= type
;
2170 param
= param
-> next
;
2177 #define ISFPSECTION \
2178 ((ctx -> token == VAR) || (ctx -> token == IDENT))
2181 oberon_formal_pars(oberon_context_t
* ctx
, oberon_type_t
* signature
)
2183 oberon_assert_token(ctx
, LPAREN
);
2187 signature
-> decl
= oberon_fp_section(ctx
, &signature
-> num_decl
);
2188 while(ctx
-> token
== SEMICOLON
)
2190 oberon_assert_token(ctx
, SEMICOLON
);
2191 oberon_fp_section(ctx
, &signature
-> num_decl
);
2195 oberon_assert_token(ctx
, RPAREN
);
2197 if(ctx
-> token
== COLON
)
2199 oberon_assert_token(ctx
, COLON
);
2201 oberon_object_t
* typeobj
;
2202 typeobj
= oberon_qualident(ctx
, NULL
, 1);
2203 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2205 oberon_error(ctx
, "function result is not type");
2207 if(typeobj
-> type
-> class == OBERON_TYPE_RECORD
2208 || typeobj
-> type
-> class == OBERON_TYPE_ARRAY
)
2210 oberon_error(ctx
, "records or arrays could not be result of function");
2212 signature
-> base
= typeobj
-> type
;
2217 oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
)
2219 oberon_type_t
* signature
;
2221 signature
-> class = OBERON_TYPE_PROCEDURE
;
2222 signature
-> num_decl
= 0;
2223 signature
-> base
= ctx
-> notype_type
;
2224 signature
-> decl
= NULL
;
2226 if(ctx
-> token
== LPAREN
)
2228 oberon_formal_pars(ctx
, signature
);
2233 oberon_compare_signatures(oberon_context_t
* ctx
, oberon_type_t
* a
, oberon_type_t
* b
)
2235 if(a
-> num_decl
!= b
-> num_decl
)
2237 oberon_error(ctx
, "number parameters not matched");
2240 int num_param
= a
-> num_decl
;
2241 oberon_object_t
* param_a
= a
-> decl
;
2242 oberon_object_t
* param_b
= b
-> decl
;
2243 for(int i
= 0; i
< num_param
; i
++)
2245 if(strcmp(param_a
-> name
, param_b
-> name
) != 0)
2247 oberon_error(ctx
, "param %i name not matched", i
+ 1);
2250 if(param_a
-> type
!= param_b
-> type
)
2252 oberon_error(ctx
, "param %i type not matched", i
+ 1);
2255 param_a
= param_a
-> next
;
2256 param_b
= param_b
-> next
;
2261 oberon_make_return(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2263 oberon_object_t
* proc
= ctx
-> decl
-> parent
;
2264 oberon_type_t
* result_type
= proc
-> type
-> base
;
2266 if(result_type
-> class == OBERON_TYPE_NOTYPE
)
2270 oberon_error(ctx
, "procedure has no result type");
2277 oberon_error(ctx
, "procedure requires expression on result");
2280 oberon_check_src(ctx
, expr
);
2281 oberon_check_assignment_compatible(ctx
, expr
, result_type
);
2282 expr
= oberon_cast_expr(ctx
, expr
, result_type
);
2285 proc
-> has_return
= 1;
2287 oberon_generate_return(ctx
, expr
);
2291 oberon_proc_decl_body(oberon_context_t
* ctx
, oberon_object_t
* proc
)
2293 oberon_assert_token(ctx
, SEMICOLON
);
2295 ctx
-> decl
= proc
-> scope
;
2297 oberon_decl_seq(ctx
);
2299 oberon_generate_begin_proc(ctx
, proc
);
2301 if(ctx
-> token
== BEGIN
)
2303 oberon_assert_token(ctx
, BEGIN
);
2304 oberon_statement_seq(ctx
);
2307 oberon_assert_token(ctx
, END
);
2308 char * name
= oberon_assert_ident(ctx
);
2309 if(strcmp(name
, proc
-> name
) != 0)
2311 oberon_error(ctx
, "procedure name not matched");
2314 if(proc
-> type
-> base
-> class == OBERON_TYPE_NOTYPE
2315 && proc
-> has_return
== 0)
2317 oberon_make_return(ctx
, NULL
);
2320 if(proc
-> has_return
== 0)
2322 oberon_error(ctx
, "procedure requires return");
2325 oberon_generate_end_proc(ctx
);
2326 oberon_close_scope(ctx
-> decl
);
2330 oberon_proc_decl(oberon_context_t
* ctx
)
2332 oberon_assert_token(ctx
, PROCEDURE
);
2335 if(ctx
-> token
== UPARROW
)
2337 oberon_assert_token(ctx
, UPARROW
);
2344 name
= oberon_assert_ident(ctx
);
2345 oberon_def(ctx
, &export
, &read_only
);
2347 oberon_scope_t
* proc_scope
;
2348 proc_scope
= oberon_open_scope(ctx
);
2349 ctx
-> decl
-> local
= 1;
2351 oberon_type_t
* signature
;
2352 signature
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2353 oberon_opt_formal_pars(ctx
, &signature
);
2355 //oberon_initialize_decl(ctx);
2356 oberon_generator_init_type(ctx
, signature
);
2357 oberon_close_scope(ctx
-> decl
);
2359 oberon_object_t
* proc
;
2360 proc
= oberon_find_object(ctx
-> decl
, name
, 0);
2363 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, export
, read_only
, false);
2364 proc
-> type
= signature
;
2365 proc
-> scope
= proc_scope
;
2366 oberon_generator_init_proc(ctx
, proc
);
2370 if(proc
-> class != OBERON_CLASS_PROC
)
2372 oberon_error(ctx
, "mult definition");
2379 oberon_error(ctx
, "mult procedure definition");
2383 if(proc
-> export
!= export
|| proc
-> read_only
!= read_only
)
2385 oberon_error(ctx
, "export type not matched");
2388 oberon_compare_signatures(ctx
, proc
-> type
, signature
);
2391 proc_scope
-> parent
= proc
;
2392 oberon_object_t
* param
= proc_scope
-> list
-> next
;
2395 param
-> parent
= proc
;
2396 param
= param
-> next
;
2402 oberon_proc_decl_body(ctx
, proc
);
2407 oberon_const_decl(oberon_context_t
* ctx
)
2409 oberon_item_t
* value
;
2410 oberon_object_t
* constant
;
2412 constant
= oberon_ident_def(ctx
, OBERON_CLASS_CONST
, false);
2413 oberon_assert_token(ctx
, EQUAL
);
2414 value
= oberon_const_expr(ctx
);
2415 constant
-> value
= value
;
2419 oberon_make_array_type(oberon_context_t
* ctx
, oberon_expr_t
* size
, oberon_type_t
* base
, oberon_type_t
** type
)
2421 if(size
-> is_item
== 0)
2423 oberon_error(ctx
, "requires constant");
2426 if(size
-> item
.mode
!= MODE_INTEGER
)
2428 oberon_error(ctx
, "requires integer constant");
2431 oberon_type_t
* arr
;
2433 arr
-> class = OBERON_TYPE_ARRAY
;
2434 arr
-> size
= size
-> item
.integer
;
2439 oberon_qualident_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2442 oberon_object_t
* to
;
2444 to
= oberon_qualident(ctx
, &name
, 0);
2446 //name = oberon_assert_ident(ctx);
2447 //to = oberon_find_object(ctx -> decl, name, 0);
2451 if(to
-> class != OBERON_CLASS_TYPE
)
2453 oberon_error(ctx
, "not a type");
2458 to
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, false, false, false);
2459 to
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2465 static void oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
);
2468 * Правило граматики "type". Указатель type должен указывать на существующий объект!
2472 oberon_make_multiarray(oberon_context_t
* ctx
, oberon_expr_t
* sizes
, oberon_type_t
* base
, oberon_type_t
** type
)
2480 oberon_type_t
* dim
;
2481 dim
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2483 oberon_make_multiarray(ctx
, sizes
-> next
, base
, &dim
);
2485 oberon_make_array_type(ctx
, sizes
, dim
, type
);
2489 oberon_make_open_array(oberon_context_t
* ctx
, oberon_type_t
* base
, oberon_type_t
* type
)
2491 type
-> class = OBERON_TYPE_ARRAY
;
2493 type
-> base
= base
;
2497 oberon_field_list(oberon_context_t
* ctx
, oberon_type_t
* rec
, oberon_scope_t
* modscope
)
2499 if(ctx
-> token
== IDENT
)
2502 oberon_object_t
* list
;
2503 oberon_type_t
* type
;
2504 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2506 oberon_ident_list(ctx
, OBERON_CLASS_FIELD
, true, &num
, &list
);
2507 oberon_assert_token(ctx
, COLON
);
2509 oberon_scope_t
* current
= ctx
-> decl
;
2510 ctx
-> decl
= modscope
;
2511 oberon_type(ctx
, &type
);
2512 ctx
-> decl
= current
;
2514 oberon_object_t
* field
= list
;
2515 for(int i
= 0; i
< num
; i
++)
2517 field
-> type
= type
;
2518 field
= field
-> next
;
2521 rec
-> num_decl
+= num
;
2526 oberon_type_record_body(oberon_context_t
* ctx
, oberon_type_t
* rec
)
2528 oberon_scope_t
* modscope
= ctx
-> mod
-> decl
;
2529 oberon_scope_t
* oldscope
= ctx
-> decl
;
2530 ctx
-> decl
= modscope
;
2532 if(ctx
-> token
== LPAREN
)
2534 oberon_assert_token(ctx
, LPAREN
);
2536 oberon_object_t
* typeobj
;
2537 typeobj
= oberon_qualident(ctx
, NULL
, true);
2539 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2541 oberon_error(ctx
, "base must be type");
2544 oberon_type_t
* base
= typeobj
-> type
;
2545 if(base
-> class == OBERON_TYPE_POINTER
)
2547 base
= base
-> base
;
2550 if(base
-> class != OBERON_TYPE_RECORD
)
2552 oberon_error(ctx
, "base must be record type");
2556 ctx
-> decl
= base
-> scope
;
2558 oberon_assert_token(ctx
, RPAREN
);
2565 oberon_scope_t
* this_scope
;
2566 this_scope
= oberon_open_scope(ctx
);
2567 this_scope
-> local
= true;
2568 this_scope
-> parent
= NULL
;
2569 this_scope
-> parent_type
= rec
;
2571 oberon_field_list(ctx
, rec
, modscope
);
2572 while(ctx
-> token
== SEMICOLON
)
2574 oberon_assert_token(ctx
, SEMICOLON
);
2575 oberon_field_list(ctx
, rec
, modscope
);
2578 rec
-> scope
= this_scope
;
2579 rec
-> decl
= this_scope
-> list
-> next
;
2580 ctx
-> decl
= oldscope
;
2584 oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2586 if(ctx
-> token
== IDENT
)
2588 oberon_qualident_type(ctx
, type
);
2590 else if(ctx
-> token
== ARRAY
)
2592 oberon_assert_token(ctx
, ARRAY
);
2595 oberon_expr_t
* sizes
;
2597 if(ISEXPR(ctx
-> token
))
2599 oberon_expr_list(ctx
, &num_sizes
, &sizes
, 1);
2602 oberon_assert_token(ctx
, OF
);
2604 oberon_type_t
* base
;
2605 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2606 oberon_type(ctx
, &base
);
2610 oberon_make_open_array(ctx
, base
, *type
);
2614 oberon_make_multiarray(ctx
, sizes
, base
, type
);
2617 else if(ctx
-> token
== RECORD
)
2619 oberon_type_t
* rec
;
2621 rec
-> class = OBERON_TYPE_RECORD
;
2622 rec
-> module
= ctx
-> mod
;
2624 oberon_assert_token(ctx
, RECORD
);
2625 oberon_type_record_body(ctx
, rec
);
2626 oberon_assert_token(ctx
, END
);
2630 else if(ctx
-> token
== POINTER
)
2632 oberon_assert_token(ctx
, POINTER
);
2633 oberon_assert_token(ctx
, TO
);
2635 oberon_type_t
* base
;
2636 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2637 oberon_type(ctx
, &base
);
2639 oberon_type_t
* ptr
;
2641 ptr
-> class = OBERON_TYPE_POINTER
;
2644 else if(ctx
-> token
== PROCEDURE
)
2646 oberon_open_scope(ctx
);
2647 oberon_assert_token(ctx
, PROCEDURE
);
2648 oberon_opt_formal_pars(ctx
, type
);
2649 oberon_close_scope(ctx
-> decl
);
2653 oberon_error(ctx
, "invalid type declaration");
2658 oberon_type_decl(oberon_context_t
* ctx
)
2661 oberon_object_t
* newtype
;
2662 oberon_type_t
* type
;
2666 name
= oberon_assert_ident(ctx
);
2667 oberon_def(ctx
, &export
, &read_only
);
2669 newtype
= oberon_find_object(ctx
-> decl
, name
, 0);
2672 newtype
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, export
, read_only
, false);
2673 newtype
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2674 assert(newtype
-> type
);
2678 if(newtype
-> class != OBERON_CLASS_TYPE
)
2680 oberon_error(ctx
, "mult definition");
2683 if(newtype
-> linked
)
2685 oberon_error(ctx
, "mult definition - already linked");
2688 newtype
-> export
= export
;
2689 newtype
-> read_only
= read_only
;
2692 oberon_assert_token(ctx
, EQUAL
);
2694 type
= newtype
-> type
;
2695 oberon_type(ctx
, &type
);
2697 if(type
-> class == OBERON_TYPE_NOTYPE
)
2699 oberon_error(ctx
, "recursive alias declaration");
2702 newtype
-> type
= type
;
2703 newtype
-> linked
= 1;
2706 static void oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2707 static void oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2710 oberon_prevent_recursive_pointer(oberon_context_t
* ctx
, oberon_type_t
* type
)
2712 if(type
-> class != OBERON_TYPE_POINTER
2713 && type
-> class != OBERON_TYPE_ARRAY
)
2718 if(type
-> recursive
)
2720 oberon_error(ctx
, "recursive pointer declaration");
2723 if(type
-> class == OBERON_TYPE_POINTER
2724 && type
-> base
-> class == OBERON_TYPE_POINTER
)
2726 oberon_error(ctx
, "attempt to make pointer to pointer");
2729 type
-> recursive
= 1;
2731 oberon_prevent_recursive_pointer(ctx
, type
-> base
);
2733 type
-> recursive
= 0;
2737 oberon_prevent_recursive_record(oberon_context_t
* ctx
, oberon_type_t
* type
)
2739 if(type
-> class != OBERON_TYPE_RECORD
)
2744 if(type
-> recursive
)
2746 oberon_error(ctx
, "recursive record declaration");
2749 type
-> recursive
= 1;
2753 oberon_prevent_recursive_record(ctx
, type
-> base
);
2756 int num_fields
= type
-> num_decl
;
2757 oberon_object_t
* field
= type
-> decl
;
2758 for(int i
= 0; i
< num_fields
; i
++)
2760 oberon_prevent_recursive_object(ctx
, field
);
2761 field
= field
-> next
;
2764 type
-> recursive
= 0;
2767 oberon_prevent_recursive_procedure(oberon_context_t
* ctx
, oberon_type_t
* type
)
2769 if(type
-> class != OBERON_TYPE_PROCEDURE
)
2774 if(type
-> recursive
)
2776 oberon_error(ctx
, "recursive procedure declaration");
2779 type
-> recursive
= 1;
2781 int num_fields
= type
-> num_decl
;
2782 oberon_object_t
* field
= type
-> decl
;
2783 for(int i
= 0; i
< num_fields
; i
++)
2785 oberon_prevent_recursive_object(ctx
, field
);
2786 field
= field
-> next
;
2789 type
-> recursive
= 0;
2793 oberon_prevent_recursive_array(oberon_context_t
* ctx
, oberon_type_t
* type
)
2795 if(type
-> class != OBERON_TYPE_ARRAY
)
2800 if(type
-> recursive
)
2802 oberon_error(ctx
, "recursive array declaration");
2805 type
-> recursive
= 1;
2807 oberon_prevent_recursive_type(ctx
, type
-> base
);
2809 type
-> recursive
= 0;
2813 oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2815 if(type
-> class == OBERON_TYPE_POINTER
)
2817 oberon_prevent_recursive_pointer(ctx
, type
);
2819 else if(type
-> class == OBERON_TYPE_RECORD
)
2821 oberon_prevent_recursive_record(ctx
, type
);
2823 else if(type
-> class == OBERON_TYPE_ARRAY
)
2825 oberon_prevent_recursive_array(ctx
, type
);
2827 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2829 oberon_prevent_recursive_procedure(ctx
, type
);
2834 oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2838 case OBERON_CLASS_VAR
:
2839 case OBERON_CLASS_TYPE
:
2840 case OBERON_CLASS_PARAM
:
2841 case OBERON_CLASS_VAR_PARAM
:
2842 case OBERON_CLASS_FIELD
:
2843 oberon_prevent_recursive_type(ctx
, x
-> type
);
2845 case OBERON_CLASS_CONST
:
2846 case OBERON_CLASS_PROC
:
2847 case OBERON_CLASS_MODULE
:
2850 oberon_error(ctx
, "oberon_prevent_recursive_object: wat");
2856 oberon_prevent_recursive_decl(oberon_context_t
* ctx
)
2858 oberon_object_t
* x
= ctx
-> decl
-> list
-> next
;
2862 oberon_prevent_recursive_object(ctx
, x
);
2867 static void oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2868 static void oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2871 oberon_initialize_record_fields(oberon_context_t
* ctx
, oberon_type_t
* type
)
2873 if(type
-> class != OBERON_TYPE_RECORD
)
2878 int num_fields
= type
-> num_decl
;
2879 oberon_object_t
* field
= type
-> decl
;
2880 for(int i
= 0; i
< num_fields
; i
++)
2882 if(field
-> type
-> class == OBERON_TYPE_POINTER
)
2884 oberon_initialize_type(ctx
, field
-> type
);
2887 oberon_initialize_object(ctx
, field
);
2888 field
= field
-> next
;
2891 oberon_generator_init_record(ctx
, type
);
2895 oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2897 if(type
-> class == OBERON_TYPE_NOTYPE
)
2899 oberon_error(ctx
, "undeclarated type");
2902 if(type
-> initialized
)
2907 type
-> initialized
= 1;
2909 if(type
-> class == OBERON_TYPE_POINTER
)
2911 oberon_initialize_type(ctx
, type
-> base
);
2912 oberon_generator_init_type(ctx
, type
);
2914 else if(type
-> class == OBERON_TYPE_ARRAY
)
2916 if(type
-> size
!= 0)
2918 if(type
-> base
-> class == OBERON_TYPE_ARRAY
)
2920 if(type
-> base
-> size
== 0)
2922 oberon_error(ctx
, "open array not allowed as array element");
2927 oberon_initialize_type(ctx
, type
-> base
);
2928 oberon_generator_init_type(ctx
, type
);
2930 else if(type
-> class == OBERON_TYPE_RECORD
)
2932 oberon_generator_init_type(ctx
, type
);
2933 oberon_initialize_record_fields(ctx
, type
);
2935 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2937 int num_fields
= type
-> num_decl
;
2938 oberon_object_t
* field
= type
-> decl
;
2939 for(int i
= 0; i
< num_fields
; i
++)
2941 //oberon_initialize_object(ctx, field);
2942 oberon_initialize_type(ctx
, field
-> type
);
2943 field
= field
-> next
;
2946 oberon_generator_init_type(ctx
, type
);
2950 oberon_generator_init_type(ctx
, type
);
2955 oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2957 if(x
-> initialized
)
2962 x
-> initialized
= 1;
2966 case OBERON_CLASS_TYPE
:
2967 oberon_initialize_type(ctx
, x
-> type
);
2969 case OBERON_CLASS_VAR
:
2970 case OBERON_CLASS_FIELD
:
2971 if(x
-> type
-> class == OBERON_TYPE_ARRAY
)
2973 if(x
-> type
-> size
== 0)
2975 oberon_error(ctx
, "open array not allowed as variable or field");
2978 oberon_initialize_type(ctx
, x
-> type
);
2979 oberon_generator_init_var(ctx
, x
);
2981 case OBERON_CLASS_PARAM
:
2982 case OBERON_CLASS_VAR_PARAM
:
2983 oberon_initialize_type(ctx
, x
-> type
);
2984 oberon_generator_init_var(ctx
, x
);
2986 case OBERON_CLASS_CONST
:
2987 case OBERON_CLASS_PROC
:
2988 case OBERON_CLASS_MODULE
:
2991 oberon_error(ctx
, "oberon_initialize_object: wat");
2997 oberon_initialize_decl(oberon_context_t
* ctx
)
2999 oberon_object_t
* x
= ctx
-> decl
-> list
;
3003 oberon_initialize_object(ctx
, x
-> next
);
3009 oberon_prevent_undeclarated_procedures(oberon_context_t
* ctx
)
3011 oberon_object_t
* x
= ctx
-> decl
-> list
;
3015 if(x
-> next
-> class == OBERON_CLASS_PROC
)
3017 if(x
-> next
-> linked
== 0)
3019 oberon_error(ctx
, "unresolved forward declaration");
3027 oberon_decl_seq(oberon_context_t
* ctx
)
3029 if(ctx
-> token
== CONST
)
3031 oberon_assert_token(ctx
, CONST
);
3032 while(ctx
-> token
== IDENT
)
3034 oberon_const_decl(ctx
);
3035 oberon_assert_token(ctx
, SEMICOLON
);
3039 if(ctx
-> token
== TYPE
)
3041 oberon_assert_token(ctx
, TYPE
);
3042 while(ctx
-> token
== IDENT
)
3044 oberon_type_decl(ctx
);
3045 oberon_assert_token(ctx
, SEMICOLON
);
3049 if(ctx
-> token
== VAR
)
3051 oberon_assert_token(ctx
, VAR
);
3052 while(ctx
-> token
== IDENT
)
3054 oberon_var_decl(ctx
);
3055 oberon_assert_token(ctx
, SEMICOLON
);
3059 oberon_prevent_recursive_decl(ctx
);
3060 oberon_initialize_decl(ctx
);
3062 while(ctx
-> token
== PROCEDURE
)
3064 oberon_proc_decl(ctx
);
3065 oberon_assert_token(ctx
, SEMICOLON
);
3068 oberon_prevent_undeclarated_procedures(ctx
);
3071 static oberon_expr_t
*
3072 oberon_make_temp_var_item(oberon_context_t
* ctx
, oberon_type_t
* type
)
3074 oberon_object_t
* x
;
3075 oberon_expr_t
* expr
;
3077 x
= oberon_create_object(ctx
-> decl
, "TEMP", OBERON_CLASS_VAR
, false, false);
3080 oberon_generator_init_temp_var(ctx
, x
);
3082 expr
= oberon_new_item(MODE_VAR
, type
, false);
3083 expr
-> item
.var
= x
;
3088 oberon_statement_seq(oberon_context_t
* ctx
);
3091 oberon_assign(oberon_context_t
* ctx
, oberon_expr_t
* src
, oberon_expr_t
* dst
)
3093 oberon_check_dst(ctx
, dst
);
3094 oberon_check_assignment_compatible(ctx
, src
, dst
-> result
);
3096 if(oberon_is_array_of_char_type(dst
-> result
)
3097 && oberon_is_string_type(src
-> result
))
3100 oberon_make_copy_call(ctx
, 2, src
);
3104 src
= oberon_cast_expr(ctx
, src
, dst
-> result
);
3105 oberon_generate_assign(ctx
, src
, dst
);
3109 static oberon_expr_t
*
3110 oberon_case_labels(oberon_context_t
* ctx
, oberon_expr_t
* val
)
3114 oberon_expr_t
* cond
;
3115 oberon_expr_t
* cond2
;
3117 e1
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3120 if(ctx
-> token
== DOTDOT
)
3122 oberon_assert_token(ctx
, DOTDOT
);
3123 e2
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3129 cond
= oberon_make_bin_op(ctx
, EQUAL
, val
, e1
);
3133 /* val >= e1 && val <= e2 */
3134 cond
= oberon_make_bin_op(ctx
, GEQ
, val
, e1
);
3135 cond2
= oberon_make_bin_op(ctx
, LEQ
, val
, e2
);
3136 cond
= oberon_make_bin_op(ctx
, AND
, cond
, cond2
);
3143 oberon_case(oberon_context_t
* ctx
, oberon_expr_t
* val
, gen_label_t
* end
)
3145 oberon_expr_t
* cond
;
3146 oberon_expr_t
* cond2
;
3147 gen_label_t
* this_end
;
3149 if(ISEXPR(ctx
-> token
))
3151 this_end
= oberon_generator_reserve_label(ctx
);
3153 cond
= oberon_case_labels(ctx
, val
);
3154 while(ctx
-> token
== COMMA
)
3156 oberon_assert_token(ctx
, COMMA
);
3158 cond2
= oberon_case_labels(ctx
, val
);
3159 cond
= oberon_make_bin_op(ctx
, OR
, cond
, cond2
);
3161 oberon_assert_token(ctx
, COLON
);
3163 oberon_generate_branch(ctx
, cond
, false, this_end
);
3164 oberon_statement_seq(ctx
);
3165 oberon_generate_goto(ctx
, end
);
3167 oberon_generate_label(ctx
, this_end
);
3172 oberon_case_statement(oberon_context_t
* ctx
)
3174 oberon_expr_t
* val
;
3175 oberon_expr_t
* expr
;
3178 end
= oberon_generator_reserve_label(ctx
);
3180 oberon_assert_token(ctx
, CASE
);
3181 expr
= oberon_expr(ctx
);
3182 val
= oberon_make_temp_var_item(ctx
, expr
-> result
);
3183 oberon_assign(ctx
, expr
, val
);
3184 oberon_assert_token(ctx
, OF
);
3185 oberon_case(ctx
, val
, end
);
3186 while(ctx
-> token
== BAR
)
3188 oberon_assert_token(ctx
, BAR
);
3189 oberon_case(ctx
, val
, end
);
3192 if(ctx
-> token
== ELSE
)
3194 oberon_assert_token(ctx
, ELSE
);
3195 oberon_statement_seq(ctx
);
3199 oberon_generate_trap(ctx
, -1);
3202 oberon_generate_label(ctx
, end
);
3203 oberon_assert_token(ctx
, END
);
3207 oberon_with_guard_do(oberon_context_t
* ctx
, gen_label_t
* end
)
3209 oberon_expr_t
* val
;
3210 oberon_expr_t
* var
;
3211 oberon_expr_t
* type
;
3212 oberon_expr_t
* cond
;
3213 oberon_expr_t
* cast
;
3214 oberon_type_t
* old_type
;
3215 gen_var_t
* old_var
;
3216 gen_label_t
* this_end
;
3218 this_end
= oberon_generator_reserve_label(ctx
);
3220 var
= oberon_qualident_expr(ctx
);
3221 oberon_assert_token(ctx
, COLON
);
3222 type
= oberon_qualident_expr(ctx
);
3223 cond
= oberon_make_bin_op(ctx
, IS
, var
, type
);
3225 oberon_assert_token(ctx
, DO
);
3226 oberon_generate_branch(ctx
, cond
, false, this_end
);
3228 /* Сохраняем ссылку во временной переменной */
3229 val
= oberon_make_temp_var_item(ctx
, type
-> result
);
3230 //cast = oberno_make_record_cast(ctx, var, type -> result);
3231 cast
= oberon_cast_expr(ctx
, var
, type
-> result
);
3232 oberon_assign(ctx
, cast
, val
);
3233 /* Подменяем тип у оригинальной переменной */
3234 old_type
= var
-> item
.var
-> type
;
3235 var
-> item
.var
-> type
= type
-> result
;
3236 /* Подменяем ссылку на переменную */
3237 old_var
= var
-> item
.var
-> gen_var
;
3238 var
-> item
.var
-> gen_var
= val
-> item
.var
-> gen_var
;
3240 oberon_statement_seq(ctx
);
3241 oberon_generate_goto(ctx
, end
);
3242 oberon_generate_label(ctx
, this_end
);
3244 /* Возвращаем исходное состояние */
3245 var
-> item
.var
-> gen_var
= old_var
;
3246 var
-> item
.var
-> type
= old_type
;
3250 oberon_with_statement(oberon_context_t
* ctx
)
3253 end
= oberon_generator_reserve_label(ctx
);
3255 oberon_assert_token(ctx
, WITH
);
3256 oberon_with_guard_do(ctx
, end
);
3257 while(ctx
-> token
== BAR
)
3259 oberon_assert_token(ctx
, BAR
);
3260 oberon_with_guard_do(ctx
, end
);
3263 if(ctx
-> token
== ELSE
)
3265 oberon_assert_token(ctx
, ELSE
);
3266 oberon_statement_seq(ctx
);
3270 oberon_generate_trap(ctx
, -2);
3273 oberon_generate_label(ctx
, end
);
3274 oberon_assert_token(ctx
, END
);
3278 oberon_statement(oberon_context_t
* ctx
)
3280 oberon_expr_t
* item1
;
3281 oberon_expr_t
* item2
;
3283 if(ctx
-> token
== IDENT
)
3285 item1
= oberon_designator(ctx
);
3286 if(ctx
-> token
== ASSIGN
)
3288 oberon_assert_token(ctx
, ASSIGN
);
3289 item2
= oberon_expr(ctx
);
3290 oberon_assign(ctx
, item2
, item1
);
3294 oberon_opt_proc_parens(ctx
, item1
);
3297 else if(ctx
-> token
== IF
)
3301 oberon_expr_t
* cond
;
3303 els
= oberon_generator_reserve_label(ctx
);
3304 end
= oberon_generator_reserve_label(ctx
);
3306 oberon_assert_token(ctx
, IF
);
3307 cond
= oberon_expr(ctx
);
3308 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3310 oberon_error(ctx
, "condition must be boolean");
3312 oberon_assert_token(ctx
, THEN
);
3313 oberon_generate_branch(ctx
, cond
, false, els
);
3314 oberon_statement_seq(ctx
);
3315 oberon_generate_goto(ctx
, end
);
3316 oberon_generate_label(ctx
, els
);
3318 while(ctx
-> token
== ELSIF
)
3320 els
= oberon_generator_reserve_label(ctx
);
3322 oberon_assert_token(ctx
, ELSIF
);
3323 cond
= oberon_expr(ctx
);
3324 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3326 oberon_error(ctx
, "condition must be boolean");
3328 oberon_assert_token(ctx
, THEN
);
3329 oberon_generate_branch(ctx
, cond
, false, els
);
3330 oberon_statement_seq(ctx
);
3331 oberon_generate_goto(ctx
, end
);
3332 oberon_generate_label(ctx
, els
);
3335 if(ctx
-> token
== ELSE
)
3337 oberon_assert_token(ctx
, ELSE
);
3338 oberon_statement_seq(ctx
);
3341 oberon_generate_label(ctx
, end
);
3342 oberon_assert_token(ctx
, END
);
3344 else if(ctx
-> token
== WHILE
)
3346 gen_label_t
* begin
;
3348 oberon_expr_t
* cond
;
3350 begin
= oberon_generator_reserve_label(ctx
);
3351 end
= oberon_generator_reserve_label(ctx
);
3353 oberon_assert_token(ctx
, WHILE
);
3354 oberon_generate_label(ctx
, begin
);
3355 cond
= oberon_expr(ctx
);
3356 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3358 oberon_error(ctx
, "condition must be boolean");
3360 oberon_generate_branch(ctx
, cond
, false, end
);
3362 oberon_assert_token(ctx
, DO
);
3363 oberon_statement_seq(ctx
);
3364 oberon_generate_goto(ctx
, begin
);
3366 oberon_assert_token(ctx
, END
);
3367 oberon_generate_label(ctx
, end
);
3369 else if(ctx
-> token
== REPEAT
)
3371 gen_label_t
* begin
;
3372 oberon_expr_t
* cond
;
3374 begin
= oberon_generator_reserve_label(ctx
);
3375 oberon_generate_label(ctx
, begin
);
3376 oberon_assert_token(ctx
, REPEAT
);
3378 oberon_statement_seq(ctx
);
3380 oberon_assert_token(ctx
, UNTIL
);
3382 cond
= oberon_expr(ctx
);
3383 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3385 oberon_error(ctx
, "condition must be boolean");
3388 oberon_generate_branch(ctx
, cond
, true, begin
);
3390 else if(ctx
-> token
== FOR
)
3392 oberon_expr_t
* from
;
3393 oberon_expr_t
* index
;
3395 oberon_expr_t
* bound
;
3397 oberon_expr_t
* cond
;
3398 oberon_expr_t
* count
;
3399 gen_label_t
* begin
;
3404 begin
= oberon_generator_reserve_label(ctx
);
3405 end
= oberon_generator_reserve_label(ctx
);
3407 oberon_assert_token(ctx
, FOR
);
3408 iname
= oberon_assert_ident(ctx
);
3409 index
= oberon_ident_item(ctx
, iname
);
3410 oberon_assert_token(ctx
, ASSIGN
);
3411 from
= oberon_expr(ctx
);
3412 oberon_assert_token(ctx
, TO
);
3413 bound
= oberon_make_temp_var_item(ctx
, index
-> result
);
3414 to
= oberon_expr(ctx
);
3415 oberon_assign(ctx
, to
, bound
); // сначала temp
3416 oberon_assign(ctx
, from
, index
); // потом i
3417 if(ctx
-> token
== BY
)
3419 oberon_assert_token(ctx
, BY
);
3420 by
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3424 by
= oberon_make_integer(ctx
, 1);
3427 if(by
-> result
-> class != OBERON_TYPE_INTEGER
)
3429 oberon_error(ctx
, "must be integer");
3432 if(by
-> item
.integer
> 0)
3436 else if(by
-> item
.integer
< 0)
3442 oberon_error(ctx
, "zero step not allowed");
3445 oberon_assert_token(ctx
, DO
);
3446 oberon_generate_label(ctx
, begin
);
3447 cond
= oberon_make_bin_op(ctx
, op
, index
, bound
);
3448 oberon_generate_branch(ctx
, cond
, false, end
);
3449 oberon_statement_seq(ctx
);
3450 count
= oberon_make_bin_op(ctx
, PLUS
, index
, by
);
3451 oberon_assign(ctx
, count
, index
);
3452 oberon_generate_goto(ctx
, begin
);
3453 oberon_generate_label(ctx
, end
);
3454 oberon_assert_token(ctx
, END
);
3456 else if(ctx
-> token
== LOOP
)
3458 gen_label_t
* begin
;
3461 begin
= oberon_generator_reserve_label(ctx
);
3462 end
= oberon_generator_reserve_label(ctx
);
3464 oberon_open_scope(ctx
);
3465 oberon_assert_token(ctx
, LOOP
);
3466 oberon_generate_label(ctx
, begin
);
3467 ctx
-> decl
-> exit_label
= end
;
3468 oberon_statement_seq(ctx
);
3469 oberon_generate_goto(ctx
, begin
);
3470 oberon_generate_label(ctx
, end
);
3471 oberon_assert_token(ctx
, END
);
3472 oberon_close_scope(ctx
-> decl
);
3474 else if(ctx
-> token
== EXIT
)
3476 oberon_assert_token(ctx
, EXIT
);
3477 if(ctx
-> decl
-> exit_label
== NULL
)
3479 oberon_error(ctx
, "not in LOOP-END");
3481 oberon_generate_goto(ctx
, ctx
-> decl
-> exit_label
);
3483 else if(ctx
-> token
== CASE
)
3485 oberon_case_statement(ctx
);
3487 else if(ctx
-> token
== WITH
)
3489 oberon_with_statement(ctx
);
3491 else if(ctx
-> token
== RETURN
)
3493 oberon_assert_token(ctx
, RETURN
);
3494 if(ISEXPR(ctx
-> token
))
3496 oberon_expr_t
* expr
;
3497 expr
= oberon_expr(ctx
);
3498 oberon_make_return(ctx
, expr
);
3502 oberon_make_return(ctx
, NULL
);
3508 oberon_statement_seq(oberon_context_t
* ctx
)
3510 oberon_statement(ctx
);
3511 while(ctx
-> token
== SEMICOLON
)
3513 oberon_assert_token(ctx
, SEMICOLON
);
3514 oberon_statement(ctx
);
3519 oberon_import_module(oberon_context_t
* ctx
, char * alias
, char * name
)
3521 oberon_module_t
* m
= ctx
-> module_list
;
3522 while(m
&& strcmp(m
-> name
, name
) != 0)
3530 code
= ctx
-> import_module(name
);
3533 oberon_error(ctx
, "no such module");
3536 m
= oberon_compile_module(ctx
, code
);
3542 oberon_error(ctx
, "cyclic module import");
3545 oberon_object_t
* ident
;
3546 ident
= oberon_define_object(ctx
-> decl
, alias
, OBERON_CLASS_MODULE
, false, false, false);
3547 ident
-> module
= m
;
3551 oberon_import_decl(oberon_context_t
* ctx
)
3556 alias
= name
= oberon_assert_ident(ctx
);
3557 if(ctx
-> token
== ASSIGN
)
3559 oberon_assert_token(ctx
, ASSIGN
);
3560 name
= oberon_assert_ident(ctx
);
3563 oberon_import_module(ctx
, alias
, name
);
3567 oberon_import_list(oberon_context_t
* ctx
)
3569 oberon_assert_token(ctx
, IMPORT
);
3571 oberon_import_decl(ctx
);
3572 while(ctx
-> token
== COMMA
)
3574 oberon_assert_token(ctx
, COMMA
);
3575 oberon_import_decl(ctx
);
3578 oberon_assert_token(ctx
, SEMICOLON
);
3582 oberon_parse_module(oberon_context_t
* ctx
)
3586 oberon_read_token(ctx
);
3588 oberon_assert_token(ctx
, MODULE
);
3589 name1
= oberon_assert_ident(ctx
);
3590 oberon_assert_token(ctx
, SEMICOLON
);
3591 ctx
-> mod
-> name
= name1
;
3593 oberon_generator_init_module(ctx
, ctx
-> mod
);
3595 if(ctx
-> token
== IMPORT
)
3597 oberon_import_list(ctx
);
3600 oberon_decl_seq(ctx
);
3602 oberon_generate_begin_module(ctx
);
3603 if(ctx
-> token
== BEGIN
)
3605 oberon_assert_token(ctx
, BEGIN
);
3606 oberon_statement_seq(ctx
);
3608 oberon_generate_end_module(ctx
);
3610 oberon_assert_token(ctx
, END
);
3611 name2
= oberon_assert_ident(ctx
);
3612 oberon_expect_token(ctx
, DOT
);
3614 if(strcmp(name1
, name2
) != 0)
3616 oberon_error(ctx
, "module name not matched");
3619 oberon_generator_fini_module(ctx
-> mod
);
3622 // =======================================================================
3624 // =======================================================================
3626 static oberon_expr_t
*
3627 oberon_make_min_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3631 oberon_error(ctx
, "too few arguments");
3636 oberon_error(ctx
, "too mach arguments");
3639 oberon_expr_t
* arg
;
3642 if(!oberon_is_type_expr(arg
))
3644 oberon_error(ctx
, "MIN accept only type");
3647 oberon_expr_t
* expr
;
3648 int bits
= arg
-> result
-> size
* 8;
3649 switch(arg
-> result
-> class)
3651 case OBERON_TYPE_INTEGER
:
3652 expr
= oberon_make_integer(ctx
, -powl(2, bits
- 1));
3654 case OBERON_TYPE_BOOLEAN
:
3655 expr
= oberon_make_boolean(ctx
, false);
3657 case OBERON_TYPE_CHAR
:
3658 expr
= oberon_make_char(ctx
, 0);
3660 case OBERON_TYPE_REAL
:
3661 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (-FLT_MAX
) : (-DBL_MAX
), arg
-> result
);
3663 case OBERON_TYPE_SET
:
3664 expr
= oberon_make_integer(ctx
, 0);
3667 oberon_error(ctx
, "allowed only basic types");
3674 static oberon_expr_t
*
3675 oberon_make_max_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3679 oberon_error(ctx
, "too few arguments");
3684 oberon_error(ctx
, "too mach arguments");
3687 oberon_expr_t
* arg
;
3690 if(!oberon_is_type_expr(arg
))
3692 oberon_error(ctx
, "MAX accept only type");
3695 oberon_expr_t
* expr
;
3696 int bits
= arg
-> result
-> size
* 8;
3697 switch(arg
-> result
-> class)
3699 case OBERON_TYPE_INTEGER
:
3700 expr
= oberon_make_integer(ctx
, powl(2, bits
- 1) - 1);
3702 case OBERON_TYPE_BOOLEAN
:
3703 expr
= oberon_make_boolean(ctx
, true);
3705 case OBERON_TYPE_CHAR
:
3706 expr
= oberon_make_char(ctx
, powl(2, bits
) - 1);
3708 case OBERON_TYPE_REAL
:
3709 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (FLT_MAX
) : (DBL_MAX
), arg
-> result
);
3711 case OBERON_TYPE_SET
:
3712 expr
= oberon_make_integer(ctx
, bits
);
3715 oberon_error(ctx
, "allowed only basic types");
3722 static oberon_expr_t
*
3723 oberon_make_size_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3727 oberon_error(ctx
, "too few arguments");
3732 oberon_error(ctx
, "too mach arguments");
3735 oberon_expr_t
* arg
;
3737 if(!oberon_is_type_expr(arg
))
3739 oberon_error(ctx
, "SIZE accept only type");
3743 oberon_expr_t
* expr
;
3744 oberon_type_t
* type
= arg
-> result
;
3745 switch(type
-> class)
3747 case OBERON_TYPE_INTEGER
:
3748 case OBERON_TYPE_BOOLEAN
:
3749 case OBERON_TYPE_REAL
:
3750 case OBERON_TYPE_CHAR
:
3751 case OBERON_TYPE_SET
:
3752 size
= type
-> size
;
3755 oberon_error(ctx
, "TODO SIZE");
3759 expr
= oberon_make_integer(ctx
, size
);
3763 static oberon_expr_t
*
3764 oberon_make_abs_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3768 oberon_error(ctx
, "too few arguments");
3773 oberon_error(ctx
, "too mach arguments");
3776 oberon_expr_t
* arg
;
3778 oberon_check_src(ctx
, arg
);
3780 if(oberon_is_number_type(arg
-> result
))
3782 oberon_error(ctx
, "ABS accepts only numbers");
3785 oberon_expr_t
* expr
;
3786 if(oberon_is_const(arg
))
3788 if(oberon_is_real_type(arg
-> result
))
3790 double x
= arg
-> item
.real
;
3791 expr
= oberon_make_real(ctx
, fabsl(x
), arg
-> result
);
3795 int64_t x
= arg
-> item
.integer
;
3796 expr
= oberon_make_integer(ctx
, llabs(x
));
3801 expr
= oberon_new_operator(OP_ABS
, arg
-> result
, arg
, NULL
);
3807 oberon_make_inc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3811 oberon_error(ctx
, "too few arguments");
3816 oberon_error(ctx
, "too mach arguments");
3819 oberon_expr_t
* dst
;
3821 oberon_check_dst(ctx
, dst
);
3823 if(!oberon_is_integer_type(dst
-> result
))
3825 oberon_error(ctx
, "expect integer");
3828 oberon_expr_t
* expr
;
3829 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_make_integer(ctx
, 1));
3830 oberon_assign(ctx
, expr
, dst
);
3834 oberon_make_incl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3838 oberon_error(ctx
, "too few arguments");
3843 oberon_error(ctx
, "too mach arguments");
3846 oberon_expr_t
* dst
;
3848 oberon_check_dst(ctx
, dst
);
3850 if(!oberon_is_set_type(dst
-> result
))
3852 oberon_error(ctx
, "expect integer");
3856 x
= list_args
-> next
;
3857 oberon_check_src(ctx
, x
);
3859 if(!oberon_is_integer_type(x
-> result
))
3861 oberon_error(ctx
, "expect integer");
3864 oberon_expr_t
* expr
;
3865 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
3866 oberon_assign(ctx
, expr
, dst
);
3870 oberon_make_excl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3874 oberon_error(ctx
, "too few arguments");
3879 oberon_error(ctx
, "too mach arguments");
3882 oberon_expr_t
* dst
;
3884 oberon_check_dst(ctx
, dst
);
3886 if(!oberon_is_set_type(dst
-> result
))
3888 oberon_error(ctx
, "expect integer");
3892 x
= list_args
-> next
;
3893 oberon_check_src(ctx
, x
);
3895 if(!oberon_is_integer_type(x
-> result
))
3897 oberon_error(ctx
, "expect integer");
3900 oberon_expr_t
* expr
;
3901 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
3902 oberon_assign(ctx
, expr
, dst
);
3906 oberon_make_dec_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3910 oberon_error(ctx
, "too few arguments");
3915 oberon_error(ctx
, "too mach arguments");
3918 oberon_expr_t
* dst
;
3920 oberon_check_dst(ctx
, dst
);
3922 if(!oberon_is_integer_type(dst
-> result
))
3924 oberon_error(ctx
, "expect integer");
3927 oberon_expr_t
* expr
;
3928 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_make_integer(ctx
, 1));
3929 oberon_assign(ctx
, expr
, dst
);
3933 oberon_make_new_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3937 oberon_error(ctx
, "too few arguments");
3940 oberon_expr_t
* dst
;
3942 oberon_check_dst(ctx
, dst
);
3944 oberon_type_t
* type
;
3945 type
= dst
-> result
;
3947 if(type
-> class != OBERON_TYPE_POINTER
)
3949 oberon_error(ctx
, "not a pointer");
3952 type
= type
-> base
;
3954 oberon_expr_t
* src
;
3955 src
= oberon_new_item(MODE_NEW
, dst
-> result
, 0);
3956 src
-> item
.num_args
= 0;
3957 src
-> item
.args
= NULL
;
3960 if(type
-> class == OBERON_TYPE_ARRAY
)
3962 if(type
-> size
== 0)
3964 oberon_type_t
* x
= type
;
3965 while(x
-> class == OBERON_TYPE_ARRAY
)
3975 if(num_args
< max_args
)
3977 oberon_error(ctx
, "too few arguments");
3980 if(num_args
> max_args
)
3982 oberon_error(ctx
, "too mach arguments");
3985 int num_sizes
= max_args
- 1;
3986 oberon_expr_t
* size_list
= list_args
-> next
;
3988 oberon_expr_t
* arg
= size_list
;
3989 for(int i
= 0; i
< max_args
- 1; i
++)
3991 oberon_check_src(ctx
, arg
);
3992 if(arg
-> result
-> class != OBERON_TYPE_INTEGER
)
3994 oberon_error(ctx
, "size must be integer");
3999 src
-> item
.num_args
= num_sizes
;
4000 src
-> item
.args
= size_list
;
4002 else if(type
-> class != OBERON_TYPE_RECORD
)
4004 oberon_error(ctx
, "oberon_make_new_call: wat");
4007 if(num_args
> max_args
)
4009 oberon_error(ctx
, "too mach arguments");
4012 oberon_assign(ctx
, src
, dst
);
4016 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4020 oberon_error(ctx
, "too few arguments");
4025 oberon_error(ctx
, "too mach arguments");
4028 oberon_expr_t
* src
;
4030 oberon_check_src(ctx
, src
);
4032 oberon_expr_t
* dst
;
4033 dst
= list_args
-> next
;
4034 oberon_check_dst(ctx
, dst
);
4036 if(!oberon_is_string_type(src
-> result
) && !oberon_is_array_of_char_type(src
-> result
))
4038 oberon_error(ctx
, "source must be string or array of char");
4041 if(!oberon_is_array_of_char_type(dst
-> result
))
4043 oberon_error(ctx
, "dst must be array of char");
4046 oberon_generate_copy(ctx
, src
, dst
);
4050 oberon_make_assert_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4054 oberon_error(ctx
, "too few arguments");
4059 oberon_error(ctx
, "too mach arguments");
4062 oberon_expr_t
* cond
;
4064 oberon_check_src(ctx
, cond
);
4066 if(!oberon_is_boolean_type(cond
-> result
))
4068 oberon_error(ctx
, "expected boolean");
4073 oberon_generate_assert(ctx
, cond
);
4077 oberon_expr_t
* num
;
4078 num
= list_args
-> next
;
4079 oberon_check_src(ctx
, num
);
4081 if(!oberon_is_integer_type(num
-> result
))
4083 oberon_error(ctx
, "expected integer");
4086 oberon_check_const(ctx
, num
);
4088 oberon_generate_assert_n(ctx
, cond
, num
-> item
.integer
);
4093 oberon_make_halt_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4097 oberon_error(ctx
, "too few arguments");
4102 oberon_error(ctx
, "too mach arguments");
4105 oberon_expr_t
* num
;
4107 oberon_check_src(ctx
, num
);
4109 if(num
-> result
-> class != OBERON_TYPE_INTEGER
)
4111 oberon_error(ctx
, "expected integer");
4114 oberon_check_const(ctx
, num
);
4116 oberon_generate_halt(ctx
, num
-> item
.integer
);
4119 static oberon_expr_t
*
4120 oberon_make_ash_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4124 oberon_error(ctx
, "too few arguments");
4129 oberon_error(ctx
, "too mach arguments");
4132 oberon_expr_t
* arg1
;
4134 oberon_check_src(ctx
, arg1
);
4135 if(arg1
-> result
-> class != OBERON_TYPE_INTEGER
)
4137 oberon_error(ctx
, "expected integer");
4140 oberon_expr_t
* arg2
;
4141 arg2
= list_args
-> next
;
4142 oberon_check_src(ctx
, arg2
);
4143 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4145 oberon_error(ctx
, "expected integer");
4148 oberon_expr_t
* expr
;
4149 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4151 int64_t x
= arg1
-> item
.integer
;
4152 int64_t y
= arg2
-> item
.integer
;
4153 expr
= oberon_make_integer(ctx
, x
* powl(2, y
));
4157 expr
= oberon_new_operator(OP_ASH
, arg1
-> result
, arg1
, arg2
);
4163 static oberon_expr_t
*
4164 oberon_make_cap_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4168 oberon_error(ctx
, "too few arguments");
4173 oberon_error(ctx
, "too mach arguments");
4176 oberon_expr_t
* arg
;
4178 oberon_check_src(ctx
, arg
);
4180 if(!oberon_is_char_type(arg
-> result
))
4182 oberon_error(ctx
, "expected char");
4185 oberon_expr_t
* expr
;
4186 if(oberon_is_const(arg
))
4188 expr
= oberon_make_char(ctx
, toupper(arg
-> item
.integer
));
4192 expr
= oberon_new_operator(OP_CAP
, arg
-> result
, arg
, NULL
);
4198 static oberon_expr_t
*
4199 oberon_make_chr_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4203 oberon_error(ctx
, "too few arguments");
4208 oberon_error(ctx
, "too mach arguments");
4211 oberon_expr_t
* arg
;
4213 oberon_check_src(ctx
, arg
);
4215 if(!oberon_is_integer_type(arg
-> result
))
4217 oberon_error(ctx
, "expected integer");
4220 oberon_expr_t
* expr
;
4221 if(oberon_is_const(arg
))
4223 expr
= oberon_make_char(ctx
, arg
-> item
.integer
);
4227 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> char_type
);
4232 static oberon_expr_t
*
4233 oberon_make_ord_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4237 oberon_error(ctx
, "too few arguments");
4242 oberon_error(ctx
, "too mach arguments");
4245 oberon_expr_t
* arg
;
4247 oberon_check_src(ctx
, arg
);
4249 if(!oberon_is_char_type(arg
-> result
))
4251 oberon_error(ctx
, "expected char");
4254 oberon_expr_t
* expr
;
4255 if(oberon_is_const(arg
))
4257 expr
= oberon_make_integer(ctx
, arg
-> item
.integer
);
4261 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> int_type
);
4266 static oberon_expr_t
*
4267 oberon_make_entier_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4271 oberon_error(ctx
, "too few arguments");
4276 oberon_error(ctx
, "too mach arguments");
4279 oberon_expr_t
* arg
;
4281 oberon_check_src(ctx
, arg
);
4283 if(!oberon_is_real_type(arg
-> result
))
4285 oberon_error(ctx
, "expected real");
4288 oberon_expr_t
* expr
;
4289 if(oberon_is_const(arg
))
4291 expr
= oberon_make_integer(ctx
, floor(arg
-> item
.real
));
4295 expr
= oberon_new_operator(OP_ENTIER
, ctx
-> int_type
, arg
, NULL
);
4300 static oberon_expr_t
*
4301 oberon_make_odd_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4305 oberon_error(ctx
, "too few arguments");
4310 oberon_error(ctx
, "too mach arguments");
4313 oberon_expr_t
* arg
;
4315 oberon_check_src(ctx
, arg
);
4317 if(!oberon_is_integer_type(arg
-> result
))
4319 oberon_error(ctx
, "expected integer");
4322 oberon_expr_t
* expr
;
4323 expr
= oberon_make_bin_op(ctx
, MOD
, arg
, oberon_make_integer(ctx
, 2));
4324 expr
= oberon_make_bin_op(ctx
, EQUAL
, expr
, oberon_make_integer(ctx
, 1));
4328 static oberon_expr_t
*
4329 oberon_make_short_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4333 oberon_error(ctx
, "too few arguments");
4338 oberon_error(ctx
, "too mach arguments");
4341 oberon_expr_t
* arg
;
4343 oberon_check_src(ctx
, arg
);
4345 if(arg
-> result
-> shorter
== NULL
)
4347 oberon_error(ctx
, "already shorter");
4350 oberon_expr_t
* expr
;
4351 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> shorter
);
4355 static oberon_expr_t
*
4356 oberon_make_long_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4360 oberon_error(ctx
, "too few arguments");
4365 oberon_error(ctx
, "too mach arguments");
4368 oberon_expr_t
* arg
;
4370 oberon_check_src(ctx
, arg
);
4372 if(arg
-> result
-> longer
== NULL
)
4374 oberon_error(ctx
, "already longer");
4377 oberon_expr_t
* expr
;
4378 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> longer
);
4382 static oberon_expr_t
*
4383 oberon_make_len_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4387 oberon_error(ctx
, "too few arguments");
4392 oberon_error(ctx
, "too mach arguments");
4397 oberon_check_src(ctx
, v
);
4399 if(!oberon_is_array_type(v
-> result
))
4401 oberon_error(ctx
, "expected array");
4407 oberon_expr_t
* num
;
4408 num
= list_args
-> next
;
4409 oberon_check_src(ctx
, num
);
4411 if(!oberon_is_integer_type(num
-> result
))
4413 oberon_error(ctx
, "expected integer");
4415 oberon_check_const(ctx
, num
);
4417 n
= num
-> item
.integer
;
4421 oberon_type_t
* arr
= v
-> result
;
4422 while(arr
-> class == OBERON_TYPE_ARRAY
)
4428 if(n
< 0 || n
> dim
)
4430 oberon_error(ctx
, "not in range 0..%i", dim
- 1);
4433 assert(v
-> is_item
);
4435 oberon_expr_t
* expr
;
4436 expr
= oberon_new_item(MODE_LEN
, ctx
-> int_type
, true);
4437 expr
-> item
.parent
= (oberon_item_t
*) v
;
4438 expr
-> item
.integer
= n
;
4443 oberon_new_const(oberon_context_t
* ctx
, char * name
, oberon_expr_t
* expr
)
4445 oberon_object_t
* constant
;
4446 constant
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_CONST
, true, false, false);
4447 oberon_check_const(ctx
, expr
);
4448 constant
-> value
= (oberon_item_t
*) expr
;
4452 register_default_types(oberon_context_t
* ctx
)
4454 ctx
-> notype_type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
4455 oberon_generator_init_type(ctx
, ctx
-> notype_type
);
4457 ctx
-> nil_type
= oberon_new_type_ptr(OBERON_TYPE_NIL
);
4458 oberon_generator_init_type(ctx
, ctx
-> nil_type
);
4460 ctx
-> string_type
= oberon_new_type_string(1);
4461 oberon_generator_init_type(ctx
, ctx
-> string_type
);
4463 ctx
-> bool_type
= oberon_new_type_boolean();
4464 oberon_generator_init_type(ctx
, ctx
-> bool_type
);
4466 ctx
-> char_type
= oberon_new_type_char(1);
4467 oberon_generator_init_type(ctx
, ctx
-> char_type
);
4469 ctx
-> byte_type
= oberon_new_type_integer(1);
4470 oberon_generator_init_type(ctx
, ctx
-> byte_type
);
4472 ctx
-> shortint_type
= oberon_new_type_integer(2);
4473 oberon_generator_init_type(ctx
, ctx
-> shortint_type
);
4475 ctx
-> int_type
= oberon_new_type_integer(4);
4476 oberon_generator_init_type(ctx
, ctx
-> int_type
);
4478 ctx
-> longint_type
= oberon_new_type_integer(8);
4479 oberon_generator_init_type(ctx
, ctx
-> longint_type
);
4481 ctx
-> real_type
= oberon_new_type_real(4);
4482 oberon_generator_init_type(ctx
, ctx
-> real_type
);
4484 ctx
-> longreal_type
= oberon_new_type_real(8);
4485 oberon_generator_init_type(ctx
, ctx
-> longreal_type
);
4487 ctx
-> set_type
= oberon_new_type_set(4);
4488 oberon_generator_init_type(ctx
, ctx
-> set_type
);
4490 ctx
-> system_byte_type
= oberon_new_type_ptr(OBERON_TYPE_SYSTEM_BYTE
);
4491 oberon_generator_init_type(ctx
, ctx
-> system_byte_type
);
4493 /* LONG / SHORT support */
4494 ctx
-> byte_type
-> shorter
= NULL
;
4495 ctx
-> byte_type
-> longer
= ctx
-> shortint_type
;
4497 ctx
-> shortint_type
-> shorter
= ctx
-> byte_type
;
4498 ctx
-> shortint_type
-> longer
= ctx
-> int_type
;
4500 ctx
-> int_type
-> shorter
= ctx
-> shortint_type
;
4501 ctx
-> int_type
-> longer
= ctx
-> longint_type
;
4503 ctx
-> longint_type
-> shorter
= ctx
-> int_type
;
4504 ctx
-> longint_type
-> longer
= NULL
;
4506 ctx
-> real_type
-> shorter
= NULL
;
4507 ctx
-> real_type
-> longer
= ctx
-> longreal_type
;
4509 ctx
-> longreal_type
-> shorter
= ctx
-> real_type
;
4510 ctx
-> longreal_type
-> longer
= NULL
;
4514 oberon_new_intrinsic(oberon_context_t
* ctx
, char * name
, GenerateFuncCallback f
, GenerateProcCallback p
)
4516 oberon_object_t
* proc
;
4517 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, true, false, false);
4518 proc
-> type
= oberon_new_type_ptr(OBERON_TYPE_PROCEDURE
);
4519 proc
-> type
-> sysproc
= true;
4520 proc
-> type
-> genfunc
= f
;
4521 proc
-> type
-> genproc
= p
;
4524 static void oberon_new_intrinsic_type(oberon_context_t
* ctx
, char * name
, oberon_type_t
* type
)
4526 oberon_object_t
* id
;
4527 id
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, true, false, false);
4532 oberon_begin_intrinsic_module(oberon_context_t
* ctx
, char * name
, oberon_module_t
** m
)
4534 oberon_scope_t
* module_scope
;
4535 module_scope
= oberon_open_scope(ctx
);
4537 oberon_module_t
* module
;
4538 module
= GC_MALLOC(sizeof *module
);
4539 memset(module
, 0, sizeof *module
);
4540 module
-> name
= name
;
4541 module
-> intrinsic
= true;
4542 module
-> decl
= module_scope
;
4543 module
-> next
= ctx
-> module_list
;
4545 ctx
-> mod
= module
;
4546 ctx
-> module_list
= module
;
4552 oberon_end_intrinsic_module(oberon_context_t
* ctx
, oberon_module_t
* m
)
4554 oberon_close_scope(m
-> decl
);
4560 oberon_create_context(ModuleImportCallback import_module
)
4562 oberon_context_t
* ctx
= GC_MALLOC(sizeof *ctx
);
4563 memset(ctx
, 0, sizeof *ctx
);
4565 oberon_scope_t
* world_scope
;
4566 world_scope
= oberon_open_scope(ctx
);
4567 ctx
-> world_scope
= world_scope
;
4569 ctx
-> import_module
= import_module
;
4571 oberon_generator_init_context(ctx
);
4574 register_default_types(ctx
);
4577 oberon_new_const(ctx
, "TRUE", oberon_make_boolean(ctx
, true));
4578 oberon_new_const(ctx
, "FALSE", oberon_make_boolean(ctx
, false));
4581 oberon_new_intrinsic_type(ctx
, "BOOLEAN", ctx
-> bool_type
);
4582 oberon_new_intrinsic_type(ctx
, "CHAR", ctx
-> char_type
);
4583 oberon_new_intrinsic_type(ctx
, "SHORTINT", ctx
-> byte_type
);
4584 oberon_new_intrinsic_type(ctx
, "INTEGER", ctx
-> shortint_type
);
4585 oberon_new_intrinsic_type(ctx
, "LONGINT", ctx
-> int_type
);
4586 oberon_new_intrinsic_type(ctx
, "HUGEINT", ctx
-> longint_type
);
4587 oberon_new_intrinsic_type(ctx
, "REAL", ctx
-> real_type
);
4588 oberon_new_intrinsic_type(ctx
, "LONGREAL", ctx
-> longreal_type
);
4589 oberon_new_intrinsic_type(ctx
, "SET", ctx
-> set_type
);
4592 oberon_new_intrinsic(ctx
, "ABS", oberon_make_abs_call
, NULL
);
4593 oberon_new_intrinsic(ctx
, "ASH", oberon_make_ash_call
, NULL
);
4594 oberon_new_intrinsic(ctx
, "CAP", oberon_make_cap_call
, NULL
);
4595 oberon_new_intrinsic(ctx
, "CHR", oberon_make_chr_call
, NULL
);
4596 oberon_new_intrinsic(ctx
, "ENTIER", oberon_make_entier_call
, NULL
);
4597 oberon_new_intrinsic(ctx
, "LEN", oberon_make_len_call
, NULL
);
4598 oberon_new_intrinsic(ctx
, "LONG", oberon_make_long_call
, NULL
);
4599 oberon_new_intrinsic(ctx
, "MAX", oberon_make_max_call
, NULL
);
4600 oberon_new_intrinsic(ctx
, "MIN", oberon_make_min_call
, NULL
);
4601 oberon_new_intrinsic(ctx
, "ODD", oberon_make_odd_call
, NULL
);
4602 oberon_new_intrinsic(ctx
, "ORD", oberon_make_ord_call
, NULL
);
4603 oberon_new_intrinsic(ctx
, "SHORT", oberon_make_short_call
, NULL
);
4604 oberon_new_intrinsic(ctx
, "SIZE", oberon_make_size_call
, NULL
);
4607 oberon_new_intrinsic(ctx
, "ASSERT", NULL
, oberon_make_assert_call
);
4608 oberon_new_intrinsic(ctx
, "COPY", NULL
, oberon_make_copy_call
);
4609 oberon_new_intrinsic(ctx
, "DEC", NULL
, oberon_make_dec_call
);
4610 oberon_new_intrinsic(ctx
, "EXCL", NULL
, oberon_make_excl_call
);
4611 oberon_new_intrinsic(ctx
, "HALT", NULL
, oberon_make_halt_call
);
4612 oberon_new_intrinsic(ctx
, "INC", NULL
, oberon_make_inc_call
);
4613 oberon_new_intrinsic(ctx
, "INCL", NULL
, oberon_make_incl_call
);
4614 oberon_new_intrinsic(ctx
, "NEW", NULL
, oberon_make_new_call
);
4617 oberon_begin_intrinsic_module(ctx
, "SYSTEM", &ctx
-> system_module
);
4620 oberon_new_intrinsic_type(ctx
, "BYTE", ctx
-> system_byte_type
);
4622 oberon_end_intrinsic_module(ctx
, ctx
-> system_module
);
4628 oberon_destroy_context(oberon_context_t
* ctx
)
4630 oberon_generator_destroy_context(ctx
);
4634 oberon_compile_module(oberon_context_t
* ctx
, const char * newcode
)
4636 const char * code
= ctx
-> code
;
4637 int code_index
= ctx
-> code_index
;
4639 int token
= ctx
-> token
;
4640 char * string
= ctx
-> string
;
4641 int integer
= ctx
-> integer
;
4642 int real
= ctx
-> real
;
4643 bool longmode
= ctx
-> longmode
;
4644 oberon_scope_t
* decl
= ctx
-> decl
;
4645 oberon_module_t
* mod
= ctx
-> mod
;
4647 oberon_scope_t
* module_scope
;
4648 module_scope
= oberon_open_scope(ctx
);
4650 oberon_module_t
* module
;
4651 module
= GC_MALLOC(sizeof *module
);
4652 memset(module
, 0, sizeof *module
);
4653 module
-> decl
= module_scope
;
4654 module
-> next
= ctx
-> module_list
;
4656 ctx
-> mod
= module
;
4657 ctx
-> module_list
= module
;
4659 oberon_init_scaner(ctx
, newcode
);
4660 oberon_parse_module(ctx
);
4662 module
-> ready
= 1;
4665 ctx
-> code_index
= code_index
;
4667 ctx
-> token
= token
;
4668 ctx
-> string
= string
;
4669 ctx
-> integer
= integer
;
4671 ctx
-> longmode
= longmode
;