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template<int i, char* buffer, int N>
struct SetDigit
{
constexpr static void doIt()
{
int digit = i % 10;
buffer[N] = digit + '0';
SetDigit<i / 10, buffer, N-1>::doIt();
}
};
template<char* buffer, int N>
struct SetDigit<0,buffer, N>
{
constexpr static void doIt()
{
buffer[N]= ' ';
SetDigit<0, buffer, N-1>::doIt();
}
};
template<char* buffer>
struct SetDigit<0, buffer, 0>
{
constexpr static void doIt()
{
buffer[0] = ' ';
}
};
struct IntToStr
{
constexpr static std::size_t MAX = 10;
static inline char buffer[MAX];
template<int i>
constexpr static char* Convert()
{
buffer[MAX - 1] = 0;
SetDigit<i, buffer, MAX - 2>::doIt();
return buffer;
}
};
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