std::variant<Types...>:: ~variant

If valueless_by_exception() is true , does nothing. Otherwise, destroys the currently contained object.

This destructor is trivial if std:: is_trivially_destructible_v < T_i > is true for all T_i in Types... .

Notes

Example

#include <cstdio>
#include <variant>
 
int main()
{
    struct X { ~X() { puts("X::~X();"); } };
    struct Y { ~Y() { puts("Y::~Y();"); } };
 
    {
        puts("entering block #1");
        std::variant<X,Y> var;
        puts("leaving block #1");
    }
 
    {
        puts("entering block #2");
        std::variant<X,Y> var{ std::in_place_index_t<1>{} }; // constructs var(Y)
        puts("leaving block #2");
    }
}

entering block #1
leaving block #1
X::~X();
entering block #2
leaving block #2
Y::~Y();

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.