Function IsASCIINumeric

libs/base/string_utils.hpp:148–151

bool IsASCIIDigit(UniChar c);
template <class StringT>
bool IsASCIINumeric(StringT const & str)
{
  return !std::empty(str) && std::all_of(std::begin(str), std::end(str), &IsASCIIDigit);
}
inline bool IsASCIINumeric(char const * s)
{
  return IsASCIINumeric(std::string_view(s));