I've looked through the mailing list but found no answer ...

On 23.02.19 06:00, [email protected] wrote:
> 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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> _______________________________________________
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