Namespaces
Variants
Views
Actions

std::nullopt

From cppreference.com
< cpp‎ | utility
Revision as of 16:54, 1 July 2013 by P12bot (Talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Defined in header <optional>
constexpr nullopt_t nullopt{/*unspecified*/};
(since C++14)

std::nullopt is a constant of type std::nullopt_t that is used to indicate optional type with uninitialized state.

[edit] See also

(C++14)
indicator of optional type with uninitialized state
(class) [edit]