printf 整数类型都用 uint8_t

#include <iostream>

#include <string>

#include <tuple>  

#include <utility>  

#include <array>  

#include <string>  

template<char...>

struct STRING 

{

};

template<typename>

struct STRING_LITERAL;

template<char... S>

struct STRING_LITERAL<STRING<S...>> 

{

  static const char s[sizeof...(S)+1];

};

template<char... S>

const char STRING_LITERAL<STRING<S...>>::s[sizeof...(S)+1] = {S..., 0};

template<typename>

struct MOD;

template<>

struct MOD<unsigned char> 

{

  using TYPE = STRING<'h', 'h', 'u'>;

};

template<>

struct MOD<signed char> 

{

  using TYPE = STRING<'h', 'h', 'u'>;

};

template<>

struct MOD<unsigned short> 

{

  using TYPE = STRING<'h', 'u'>;

};

template<typename, typename>

struct CONCAT;

template<char... S1, char... S2>

struct CONCAT<STRING<S1...>, STRING<S2...>> 

{

  using TYPE = STRING<S1..., S2...>;

};

template<char...>

struct CONVERT;

template<>

struct CONVERT<> {

  using TYPE = STRING<>;

};

template<char... S>

struct CONVERT<'`', '`', S...> 

{

  using TYPE = typename CONCAT<STRING<'`'>, typename CONVERT<S...>::TYPE>::TYPE;

};

template<char... S>

struct CONVERT<'`', '8', 'u', S...> 

{

  using TYPE = typename CONCAT<typename MOD<uint8_t>::TYPE, typename CONVERT<S...>::TYPE>::TYPE;

};

template<char... S>

struct CONVERT<'`', '8', 'd', S...> 

{

  using TYPE = typename CONCAT<typename MOD<int8_t>::TYPE, typename CONVERT<S...>::TYPE>::TYPE;

};

template<char C, char... S>

struct CONVERT<C, S...> 

{

  using TYPE = typename CONCAT<STRING<C>, typename CONVERT<S...>::TYPE>::TYPE;

};

template<typename, typename>

struct MAKE_STRING;

template<typename S, template<typename U, U...> class T, typename U, U... I>

struct MAKE_STRING<S, T<U, I...>> 

{

  using TYPE = typename CONVERT<S{}.s[I]...>::TYPE;

};

template<typename S>

using FORMAT_STRING = STRING_LITERAL<typename MAKE_STRING<S, std::make_index_sequence<sizeof(S)-1>>::TYPE>;

#define FORMAT(str) ({ struct S { const char s[sizeof(str)] = (str); }; FORMAT_STRING<S>::s;})

int main()

{

  uint8_t x = 100;

  printf(FORMAT("``%`8u\n"), x);

  

}