std::variant<Types...>::variant - cppreference.com ([original](http://en.cppreference.com/w/cpp/utility/variant/variant.html)) (raw)

| ~variant(); | | (since C++17) (constexpr since C++20) | | ------------ | | ------------------------------------- |

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....

[edit] Notes

[edit] Example

#include #include   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"); } }

Output:

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

[edit] Defect reports

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