std::shared_future::valid

 

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std::shared_future

Member functions

shared_future::shared_future

shared_future::~shared_future

shared_future::operator=

Getting the result

shared_future::get

State

shared_future::valid

shared_future::wait

shared_future::wait_for

shared_future::wait_until

 

bool valid() const;		(since C++11)

Checks if the future refers to a shared state. This is the case only for futures returned by std::promise::get_future(), std::packaged_task::get_future() or std::async() until the first time get() is called.

Parameters

(none)

Return value

true if *this refers to a shared state, otherwise false.

Exceptions

noexcept specification:  

noexcept

  (since C++11)

See also

wait	waits for the result to become available (public member function)