Created
February 5, 2018 13:55
-
-
Save dwilliamson/593a61e17d8195c96ce23ed71e138e80 to your computer and use it in GitHub Desktop.
C++11 string-to-type
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#include <stdio.h> | |
int main() | |
{ | |
using T = TYPE_STRING("helo"); | |
printf("%s\n", T::string); | |
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
template <char... C> | |
struct TypeString | |
{ | |
static constexpr const char string[sizeof...(C)+1] = { C...,'\0' }; | |
}; | |
template <int N, int M> | |
constexpr char GetChar(char const(&c)[M]) | |
{ | |
return N < M ? c[N] : 0; | |
} | |
#define TYPE_STRING(str) TypeString< \ | |
GetChar<0>(str), \ | |
GetChar<1>(str), \ | |
GetChar<2>(str), \ | |
GetChar<3>(str), \ | |
GetChar<4>(str), \ | |
GetChar<5>(str), \ | |
GetChar<6>(str), \ | |
GetChar<7>(str), \ | |
GetChar<8>(str), \ | |
GetChar<9>(str), \ | |
GetChar<10>(str), \ | |
GetChar<11>(str), \ | |
GetChar<12>(str), \ | |
GetChar<13>(str), \ | |
GetChar<14>(str), \ | |
GetChar<15>(str), \ | |
GetChar<16>(str), \ | |
GetChar<17>(str), \ | |
GetChar<18>(str), \ | |
GetChar<19>(str), \ | |
GetChar<20>(str), \ | |
GetChar<21>(str), \ | |
GetChar<22>(str), \ | |
GetChar<23>(str), \ | |
GetChar<24>(str), \ | |
GetChar<25>(str), \ | |
GetChar<26>(str), \ | |
GetChar<27>(str), \ | |
GetChar<28>(str), \ | |
GetChar<29>(str), \ | |
GetChar<30>(str), \ | |
GetChar<31>(str) \ | |
> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment