相关疑难解决方法(0)

有没有办法在编译时替换元组元素？

例如,

using a_t = std::tuple<std::string,unsigned>;  // start with some n-tuple
using b_t = element_replace<a_t,1,double>;     // std::tuple<std::string,double>
using c_t = element_replace<b_t,0,char>;       // std::tuple<char,double>