lst-0090-book.cpp
// https://godbolt.org/z/1eco9Wcr3
#include <any>
#include <iostream>
#include <vector>
#include <string>
int main() {
std::any a = 5;
std::cout << std::any_cast<int>(a) << '\n';
a = 3.456;
std::cout << std::any_cast<double>(a) << '\n';
using namespace std::literals;
std::vector<std::any> data { 4, 8.976, "Geronimo"s };
std::cout << std::any_cast<double>( data[1] ) << '\n';
std::cout << data[1].type().name() << '\n';
}