std::shared_future::valid
From cppreference.com
< cpp | thread | shared future
bool valid() const; |
(since C++11) | |
Checks if the future refers to a shared state.
This is the case only for futures that were not default-constructed or moved from. Unlike std::future, std::shared_future
's shared state is not invalidated when get()
is called.
The behavior is undefined if any member function other than the destructor, the move-assignment operator, or valid
is called on a shared_future
that does not refer to shared state (although implementations are encouraged to throw std::future_error indicating no_state
in this case).
Contents |
[edit] Parameters
(none)
[edit] Return value
true if *this refers to a shared state, otherwise false.
[edit] Exceptions
noexcept specification:
noexcept
[edit] Example
This section is incomplete Reason: no example |
[edit] See also
waits for the result to become available (public member function) |