C++でコンパイル時eval(誇張あり) ref: http://qiita.com/minamiyama1994/items/60213c62a54998bb431e

file0.cpp

#include<typeinfo>
#include"CTE/CTE.hpp"
auto main ( ) -> int
{
    auto eval1 = CTE_EVAL ( "1+20*10/(5+5)" ) ;
    auto eval2 = CTE_EVAL ( "1+20*10/(5+5)+.5" ) ;
    auto eval3 = CTE_EVAL ( u8R"*****("Hello"+" "+"World")*****" ) ;
    std::cout << eval1 << std::endl ;
    std::cout << typeid ( eval1 ).name ( ) << std::endl ;
    std::cout << eval2 << std::endl ;
    std::cout << typeid ( eval2 ).name ( ) << std::endl ;
    std::cout << eval3 << std::endl ;
    std::cout << typeid ( eval3 ).name ( ) << std::endl ;
}

file1.txt

$ ./prog
21
i
21.5
d
Hello World
Ss