Exemplo n.º 1
0
result<Ok, Error> from_maybe(const Error& err, const maybe<Ok>& maybe)
{
    if (is_just(maybe))
        return ok<Ok, Error>(unsafe_get_just(maybe));
    else
        return error<Ok, Error>(err);
}
bool is_infix_of(const Container& token, const Container& xs)
{
    return is_just(find_first_instance_of_token(token, xs));
}