gplib/include/gp/text/ascii.hpp

#pragma once

inline bool is_digit(char v) {
    return v >= '0' && v <= '9';
}

inline bool is_alpha(char v) {
    return (v >= 'a' && v <= 'z' )||(v >= 'A' && v <= 'Z');
}

inline bool is_alnum(char v) {
    return is_alpha(v) || is_digit(v);
}