1 /* $NetBSD: err_inherit4.y,v 1.2 2017/02/11 19:33:12 christos Exp $ */
2
3 %locations
4 %{
5 #include <stdlib.h>
6
7 typedef enum {cGLOBAL, cLOCAL} class;
8 typedef enum {tREAL, tINTEGER} type;
9 typedef char * name;
10
11 struct symbol { class c; type t; name id; };
12 typedef struct symbol symbol;
13
14 struct namelist { symbol *s; struct namelist *next; };
15 typedef struct namelist namelist;
16
17 extern symbol *mksymbol(type t, class c, name id);
18
19 #ifdef YYBISON
20 #define YYLEX_DECL() yylex(void)
21 #define YYERROR_DECL() yyerror(const char *s)
22 #endif
23 %}
24
25 %token <cval> GLOBAL LOCAL
26 %token <tval> REAL INTEGER
27 %token <id> NAME
28
29 %type <nlist> declaration namelist(<cval>, <tval>) locnamelist(<tval>)
30 %destructor { } <nlist>
31 %type <cval> class
32 %type <tval> type
33
34 %destructor {
35 namelist *p = $$;
36 while (p != NULL)
37 { namelist *pp = p;
38 p = p->next;
39 free(pp->s); free(pp);
40 }
41 } <nlist>
42
43 %union
44 {
45 class cval;
46 type tval;
47 namelist * nlist;
48 name id;
49 }
50
51 %start declaration
52
53 %%
54 declaration: class type namelist($1, $2)
55 { $$ = $3; @$ = @3; }
56 | type locnamelist($1)
57 { $$ = $2; @$ = @-1; }
58 ;
59
60 class : GLOBAL { $$ = cGLOBAL; }
61 | LOCAL { $$ = cLOCAL; }
62 ;
63
64 type : REAL { $$ = tREAL; }
65 | INTEGER { $$ = tINTEGER; }
66 ;
67
namelist($c,$t)68 namelist($c, $t): namelist NAME
69 { $$->s = mksymbol($t, $c, $2);
70 $$->next = $1;
71 }
72 | NAME
73 { $$->s = mksymbol($t, $c, $1);
74 $$->next = NULL;
75 }
76 ;
77
locnamelist($t)78 locnamelist($t): namelist
79 { $$ = $1; @$ = @2; }
80 ;
81 %%
82
83 extern int YYLEX_DECL();
84 extern void YYERROR_DECL();
85