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`std::future<>::has_value` Member function

Check if the asynchronous result associated with an instance of std::future is ready, and has a stored value.

bool has_value() const;

Preconditions:: this->valid() would return true.
Returns:: true if the asynchronous result associated with *this is ready and has a stored value, false otherwise.
Throws:: Nothing.

Header

#include <future>

See Also