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

extern int CURRENT_LINE_NUMBER;
extern char *yytext;

void yyerror(const char *s) {
    fprintf(stderr, "\033[91mError at line %i\033[0m", CURRENT_LINE_NUMBER);
    exit(1);
}
extern int yylex();
extern FILE *yyin;
%}

%union {
    char *str;
}

%token <str> TEXT
%token LBRACE RBRACE

%%

block: 
    LBRACE content RBRACE 
    ;

content:
    | content TEXT { 
        printf("TOKEN ('%s')\n", $2); 
        free($2); } 
    | content block
    ;
%%

int main(int argc, char **argv) {
    CURRENT_LINE_NUMBER = 1;

    if (argc > 1) {
        FILE *f = fopen(argv[1], "r");
        if (!f) {
            perror("\033[91mFail open file\033[0m");
            return 1;
        }
        yyin = f;
    }
    yyparse();
    return 0;
}