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### 2988. Clause 32 cleanup missed one `typename`

Section: 33.5.2 [atomics.syn] Status: C++20 Submitter: Jens Maurer Opened: 2017-06-25 Last modified: 2021-02-25

Priority: 0

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Discussion:

P0558R1 missed updating one of the `std::atomic_exchange` signatures to avoid independent deduction for `T` on the second parameter.

[ 2017-06-26 Moved to Tentatively Ready after 6 positive votes on c++std-lib. ]

Proposed resolution:

This wording is relative to N4659.

1. Edit 33.5.2 [atomics.syn], header `<atomic>` synopsis, as indicated:

   >     template<class T>
   >     T atomic_exchange(volatile atomic<T>*, typename atomic<T>::value_type) noexcept;