cpp_standard

constexpr _::cpp_standard_t< 0 > spy::cpp_standard {}

inlineconstexpr

C++ standard version reporting value.

The spy::current_standard object can be compared to any other current_standard related value to verify if the code being compiled with a specific version of the C++ standard.

Example

#include <spy/spy.hpp>
 
#include <iostream>
 
int main()
{
  std::cout << "This code compiled with " << spy::cpp_standard << ".\n";
 
  // Version checks
  using namespace spy::literal;
  if constexpr(spy::cpp_standard == 20_cpp) std::cout << "This code compiled with C++ 20.\n";
  if constexpr(spy::cpp_standard == 20) std::cout << "This code compiled with C++ 20.\n";
  if constexpr(spy::cpp_standard >= 17_cpp)
    std::cout << "This code compiled with C++ 17 or ulterior.\n";
  if constexpr(spy::cpp_standard >= 17)
    std::cout << "This code compiled with C++ 17 or ulterior.\n";
}