std::future<T>::operator=

Threads

(C++11)

hardware_destructive_interference_sizehardware_constructive_interference_size

(C++17)(C++17)

this_thread namespace

get_id (C++11)
yield (C++11)

sleep_for (C++11)
sleep_until (C++11)

Mutual exclusion

mutex (C++11)
recursive_mutex (C++11)
shared_mutex (C++17)

timed_mutex (C++11)
recursive_timed_mutex (C++11)
shared_timed_mutex (C++14)

Generic lock management

lock_guard (C++11)
scoped_lock (C++17)
unique_lock (C++11)
shared_lock (C++14)
defer_lock_ttry_to_lock_tadopt_lock_t (C++11)(C++11)(C++11)

lock (C++11)
try_lock (C++11)
defer_locktry_to_lockadopt_lock (C++11)(C++11)(C++11)
once_flag (C++11)
call_once (C++11)

Condition variables

condition_variable

(C++11)

condition_variable_any

(C++11)

notify_all_at_thread_exit

(C++11)

cv_status

(C++11)

Futures

promise (C++11)
future (C++11)
shared_future (C++11)
packaged_task (C++11)
async (C++11)

launch (C++11)
future_status (C++11)
future_error (C++11)
future_category (C++11)
future_errc (C++11)

future& operator=( future&& other ) noexcept;	(1)	(since C++11)
future& operator=( const future& other ) = delete;	(2)	(since C++11)

Assigns the contents of another future object.

1) Releases any shared state and move-assigns the contents of other to *this. After the assignment, other.valid() == false and this->valid() will yield the same value as other.valid() before the assignment.

2) std::future is not CopyAssignable.

Parameters

other - a std::future that will transfer state to *this

Return value

*this

Language
Standard Library Headers
Freestanding and hosted implementations
Named requirements
Language support library
Concepts library (C++20)
Diagnostics library
Utilities library
Strings library
Containers library
Iterators library
Ranges library (C++20)
Algorithms library
Numerics library
Input/output library
Localizations library
Regular expressions library (C++11)
Atomic operations library (C++11)
Thread support library (C++11)
Filesystem library (C++17)
Technical Specifications

future::future
future::~future
future::operator=
future::share
Getting the result
future::get
State
future::valid
future::wait
future::wait_for
future::wait_until