#include <iostream>
#include <string>
 
struct SomeClass {};
 
struct Container
{
	Container() = default;
	explicit Container(int) {}
	explicit Container(double) {}
	explicit Container(const std::string&) {}
	explicit Container(const SomeClass&) {}
 
	explicit operator int () const {return {}; }
	explicit operator double () const {return {}; }
	explicit operator std::string () const {return {}; }
	explicit operator SomeClass () const {return {}; }
};
 
const Container cont1(int{});
const Container cont2(double{});
const Container cont3(std::string{});
const Container cont4(SomeClass{});
 
const double v1(cont1);
const int v2(cont2);
const std::string v3(cont3);
const SomeClass v4(cont4);
 
int main() {
}

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