std::make_optional

 

C++

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Experimental libraries

Experimental standard libraries

optional (library fundamentals TS)

any (library fundamentals TS)

basic_string_view (library fundamentals TS)

Polymorphic allocator library (library fundamentals TS)

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std::experimental::optional

Member functions

optional::optional

optional::~optional

optional::operator=

Observers

optional::operator->optional::operator*

optional::operator bool

optional::value

optional::value_or

Modifiers

optional::emplace

optional::swap

Non-member functions

operator==operator<

make_optional

swap

Helper classes

hash

 

Defined in header <experimental/optional>
template< class T > constexpr optional<typename std::decay<T>::type>     make_optional( T&& value );		(library fundamentals TS)

Creates an optional object from value. Effectively calls optional<typename std::decay<T>::type>(std::forward<T>(v))

Parameters

value

-

the value to construct optional object with

Return value

An optional object with value as the contained value.

Exceptions

Throws any exception thrown by the constructor of T.

See also

(constructor)

constructs the optional object (public member function)