auto scan()

in src/common/utils/ArgParse.h [445:472]

• 26 lines of code
• 21 McCabe index (conditional complexity)

  auto scan() -> std::enable_if_t<std::is_arithmetic_v<T>, Argument &> {
    static_assert(!(std::is_const_v<T> || std::is_volatile_v<T>), "T should not be cv-qualified");
    auto is_one_of = [](char c, auto... x) constexpr { return ((c == x) || ...); };

    if constexpr (is_one_of(Shape, 'd') && details::standard_integer<T>) {
      action(details::parse_number<T, details::radix_10>());
    } else if constexpr (is_one_of(Shape, 'i') && details::standard_integer<T>) {
      action(details::parse_number<T>());
    } else if constexpr (is_one_of(Shape, 'u') && details::standard_unsigned_integer<T>) {
      action(details::parse_number<T, details::radix_10>());
    } else if constexpr (is_one_of(Shape, 'o') && details::standard_unsigned_integer<T>) {
      action(details::parse_number<T, details::radix_8>());
    } else if constexpr (is_one_of(Shape, 'x', 'X') && details::standard_unsigned_integer<T>) {
      action(details::parse_number<T, details::radix_16>());
    } else if constexpr (is_one_of(Shape, 'a', 'A') && std::is_floating_point_v<T>) {
      action(details::parse_number<T, details::chars_format::hex>());
    } else if constexpr (is_one_of(Shape, 'e', 'E') && std::is_floating_point_v<T>) {
      action(details::parse_number<T, details::chars_format::scientific>());
    } else if constexpr (is_one_of(Shape, 'f', 'F') && std::is_floating_point_v<T>) {
      action(details::parse_number<T, details::chars_format::fixed>());
    } else if constexpr (is_one_of(Shape, 'g', 'G') && std::is_floating_point_v<T>) {
      action(details::parse_number<T, details::chars_format::general>());
    } else {
      static_assert(alignof(T) == 0, "No scan specification for T");
    }

    return *this;
  }