std::promise<R>::promise
promise(); |
(1) | (since C++11) |
template< class Alloc > promise( std::allocator_arg_t, const Alloc& alloc ); |
(2) | (since C++11) |
promise( promise&& other ) noexcept; |
(3) | (since C++11) |
promise( const promise& other ) = delete; |
(4) | (since C++11) |
Constructs a promise
object.
1) Default constructor. Constructs the promise with an empty shared state.
2) Constructs the promise with an empty shared state. The shared state is allocated using
alloc
. Alloc
must meet the requirements of Allocator.3) Move constructor. Constructs the promise with the shared state of
other
using move semantics. After construction, other
has no shared state.4)
promise
is not copyable.Parameters
alloc | - | allocator to use to allocate the shared state |
other | - | another promise to acquire the state from
|
Exceptions
1-2) (none)