# std::experimental::promise (concurrency TS)

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This page is about the modified version of std::promise provided by the concurrency TS supporting the `std::future` improvements made by that TS. For the version of `promise` with type-erased allocator support provided by the Library Fundamentals TSes, see `std::experimental::fundamentals_v2::promise`.

Defined in header `<experimental/future>` |  |
template< class R > class promise; | (1) | (concurrency TS)
template< class R > class promise<R&>; | (2) | (concurrency TS)
template<> class promise<void>; | (3) | (concurrency TS)

`std::experimental::concurrency_v1::promise` is a modified version of std::promise provided by the concurrency TS that works with std::experimental::future.

The only change from std::promise is that the `get_future()` member function returns a std::experimental::future.

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