Hi Laura,
I would start with a global linked list that is filled in the semantic
actions. Building on your example:
================
%{
#include <stdio.h>
#include <stdlib.h>
typedef struct elem {
char *val;
struct elem *next;
} elem_t;
elem_t *words = NULL;
void add_word(char *val) {
elem_t *word = (elem_t *)malloc(sizeof(elem_t));
if (word == NULL) {
fprintf (stderr, "%s", "malloc failed");
exit(1); }
word->val = val;
word->next = words;
words = word;
}
%}
%output "parser.c"
%defines "parser.h"
%union { char *str; }
%token <str> WORD
%start Input
%%
Input
: WORD { add_word(yylval.str);
printf("word: %s\n", yylval.str); }
| Input WORD { add_word(yylval.str);
printf("word: %s\n", yylval.str); }
;
%%
================
Yours, Alex
On 04/02/2017 11:20 AM, Laura Morales wrote:
> I have this simple grammar which basically simply split symbols at white space
>
> ================
> %{
> #include <stdio.h>
> #include <stdlib.h>
> %}
>
> %output "parser.c"
> %defines "parser.h"
>
> %union { char *str; }
>
> %token <str> WORD
>
> %start Input
>
> %%
>
> Input
> : WORD { printf("word: %s\n", yylval.str); }
> | Input WORD { printf("word: %s\n", yylval.str); }
> ;
>
> %%
> ================
>
> I'm trying to put this into a library, so the main() is in another file. This
> works, it's printing all the words. However what I want to do instead is
> return some data structure such as an array with all the WORDs (printf() is
> only there for testing). So... how can I achieve this?
>
> _______________________________________________
> help-bison@gnu.org https://lists.gnu.org/mailman/listinfo/help-bison
>
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