std::experimental::optional<T>::emplace

Constructs the contained value in-place. If *this already contains a value before the call, the contained value is destroyed by calling its destructor.

# Declarations

template< class... Args >
void emplace( Args&&... args );

(library fundamentals TS)

template< class U, class... Args >
void emplace( std::initializer_list<U> ilist, Args&&... args );

(library fundamentals TS)

# Parameters

• args...: the arguments to pass to the constructor
• ilist: the initializer list to pass to the constructor

# Return value

(none)

# See also

• operator=