Program Listing for File number.hpp

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#ifndef RIPPLE_UTILITY_NUMBER_HPP
#define RIPPLE_UTILITY_NUMBER_HPP

#include "portability.hpp"

namespace ripple {

template <size_t Value>
struct Num {
  static constexpr auto value = size_t{Value};

  ripple_all constexpr operator size_t() const noexcept {
    return Value;
  }
};

template <int64_t Value>
struct Int64 {
  static constexpr auto value = int64_t{Value};

  ripple_all constexpr operator int64_t() const noexcept {
    return Value;
  }
};

namespace detail {

template <typename T>
struct IsNumber {
  static constexpr bool value = false;
};

template <size_t Value>
struct IsNumber<Num<Value>> {
  static constexpr bool value = true;
};

template <int64_t Value>
struct IsNumber<Int64<Value>> {
  static constexpr bool value = true;
};

} // namespace detail

template <typename T>
static constexpr bool is_number_v = detail::IsNumber<std::decay_t<T>>::value;

} // namespace ripple

#endif // RIPPLE_UTILITY_NUMBER_HPP