letter     [A-Za-z]
name       {letter}[A-Z]{1}[a-z]+(-{letter}[A-Z]{1}[a-z]+){0,1}
identity   [A-Za-z]{1}[0-9]{9}
email      [0-9]+@[a-z]+\.[a-z]+
birthday   ([12][0-9]{3}|[89][0-9]{2})/(0[1-9]|1[0-2])/(0[1-9]|[12][0-9]|3[01])
phone      \+886[0-9]{9}
 
%option noyywrap
 
%%
 
{name}     {ECHO; printf(" is a valid name.\n");}
{identity} {ECHO; printf(" is a valid identity number.\n");}
{email}    {ECHO; printf(" is a valid email.\n");}
{birthday} {ECHO; printf(" is a valid birthday.\n");}
{phone}    {ECHO; printf(" is a valid phone number.\n");}
 
%%
 
int main(int argc, char *argv[]) {
    yylex();
    return(0);
}
 

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