poorly::static_max

Poorly_StaticMax.h

// Poorly::static_max allows recursively calculating maximum value from size_t parameters/-packs at compile time
// Easily editable for any concrete parameters by replacing size_t to your desired type

namespace poorly
{
  // Originally taken from: ( https://gist.github.com/tibordp/6909880 )
  // Usage:
  // template<typename Ts...>
  // struct MyStruct { const size_t data_size = static_max<sizeof(Ts)...>::value };
  
  template <size_t arg>
  struct static_max<arg>
  {
  	static const size_t value = arg;
  };
  
  template <size_t arg1, size_t arg2, size_t ... others>
  struct static_max<arg1, arg2, others...>
  {
  	static const size_t value = arg1 >= arg2 ? static_max<arg1, others...>::value :
  		static_max<arg2, others...>::value;
  };
};


// Constexpr-friendly version
namespace poorly
{
  // Usage:
  // template<typename Ts...>
  // struct MyStruct { const size_t data_size = static_max<sizeof(Ts)...>::value() };
  
  template <size_t arg1, size_t ... others>
  struct static_max;
  
  template <size_t arg>
  struct static_max<arg>
  {
  	static constexpr size_t value() noexcept { return arg; }
  };
  
  template <size_t arg1, size_t arg2, size_t ... others>
  struct static_max<arg1, arg2, others...>
  {
  	static constexpr size_t value() noexcept
  	{
  		return arg1 >= arg2 ? static_max<arg1, others...>::value() : static_max<arg2, others...>::value();
  	}
  };
};