Very stupid error with simple example, please help me.

Thanks for you help. Now i've typed in one of the first examples and it 
throws me an strange error:

 > flex01.l:99: premature EOF

The code looks like this:

%{
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

enum {
     LOOKUP = 0,
     BOOL,
     INT,
     FLOAT,
     STRING,
     VEC2,
     VEC3,
     VEC4
};

int state;

int add_word(int type, char *word);
int lookup_word(char *word);

⅝}

%%

\n        { state = LOOKUP; }
^bool    { state = BOOL; }
^int    { state = INT; }
^float    { state = FLOAT; }
^string    { state = STRING; }
^vec2    { state = VEC2; }
^vec3    { state = VEC3; }
^vec4    { state = VEC4; }

[a-zA-z] {
             if(state == LOOKUP){
                 add_word(state, yytext);
             }else{
                 switch(lookup_word(yytext)){
                     case BOOL: printf("%s is a bool variable.\n"); break;
                     case INT: printf("%s is a int variable.\n"); break;
                     case FLOAT: printf("%s is a float variable.\n"); 
break;
                     case STRING: printf("%s is a string variable.\n"); 
break;
                     case VEC2: printf("%s is a vec2 variable.\n"); break;
                     case VEC3: printf("%s is a vec3 variable.\n"); break;
                     case VEC4: printf("%s is a vec4 variable.\n"); break;
                     default: { printf("%s not recognized!\n", yytext); 
break; }
                 }
             }
}

%%

struct word {
     char *word_name;
     int word_type;
     struct word *next;
};

struct word *wordlist;

int add_word(int type, char *word)
{
     struct word *wp;

     if(lookup_word(word) != LOOKUP){
         printf("Word %s already in the symbol table!\n", word);
         return 0;
     }

     wp = (struct word *) malloc(sizeof(struct word));

     wp->next = word_list;
     wp->word_name = (char*) malloc((sizeof(char)*strlen(word))+1);
     strcpy(wp->word_name, word);
     wp->word_type = type;
     word_list = wp;
     return 1;
}

int lookup_word(char *word)
{
     struct word *wp = word_list;

     for(; wp; wp=wp->next){
         if(strcmp(wp->word_name, word) == 0){
             return wp->word_type;
         }
     }

     return LOOKUP;
}

int main(int argc, char **argv)
{
     yylex();

     return 0;
}

Why is the there an premature EOF ??


best regards!






On 22.02.19 18:29, Jannick wrote:
> On Fri, 22 Feb 2019 17:02:57 +0100, [email protected] wrote:
>
>> $gcc lex.yy.c -o test -Wall
> Comparing to your earlier compile statement, you dropped '-lfl' which 
> caused the linking error.  To remedy the situation add to the top of 
> the flex file
>
> %option noyywrap
> %option noinput nounput
>
> Then the errors should go away. The first option makes linking against 
> the flex library obsolete.
>
> Enjoy flex.
>
> HTH
> J.
>
>
> _______________________________________________
> [email protected] https://lists.gnu.org/mailman/listinfo/help-bison
>

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