[atomic.ref.generic] Issues regarding P3323R1

Issue 1: The paper adds this paragraph to multiple sections:

The program is ill-formed if is_always_lock_free is false and is_volatile_v<T> is true.

For the main template, it is OK, but there are issues with the (partial) specializations:

• For the integral and floating-point specializations, there is no template parameter T, so is_volatile_v<T> cannot be well-formed.
• For the pointer partial specialization, T refers to the pointed-to type, testing whether it is volatile is definitely not the intention of the author.

Issue 2: The paper adds this paragraph to [atomics.ref.pointer]:

There are specializations of the atomic_ref class template for all pointer-to-object types. For each such
type pointer-type, the specialization atomic_ref<pointer-type> provides additional atomic operations
appropriate to pointer types.

This paragraph seems to identify the pointer specializations as explicit (full) specializations, but it is impossible to enumerate all pointer(-to-object) types. The wording also implies that pointer-to-function types should match the main template, which is currently not the case. Currently, pointer-to-function types match the partial specialization, and such specializations can invoke the member functions that are also provided in the main template (the additional operations are guarded by [atomics.ref.pointer] p6). We should not change this.

We should keep the partial specialization, and we need to redefine atomic_ref<pointer-type> to make use of the template parameter T.

Suggested resolution (I can file a PR if CWG agrees with this direction):

• [atomics.ref.int] p2: Replace is_volatile_v<T> with is_volatile_v<integral-type>.
• [atomics.ref.float] p2: Replace is_volatile_v<T> with is_volatile_v<floating-point-type>.
• [atomics.ref.pointer] p1: Replace paragraph with:

There are partial specializations of the atomic_ref class template for all pointer types. For each type-id pointer-type among T*, T* const, T* volatile, and T* const volatile, the partial specialization atomic_ref<pointer-type> provides additional atomic operations appropriate to pointer-to-object types.

• [atomics.ref.pointer] p2: Replace is_volatile_v<T> with is_volatile_v<pointer-type>.

Search the draft for [atomics.ref.int], [atomics.ref.float], and [atomics.ref.pointer], then compare the existing paragraphs with the suggested resolution. Done means correcting the is_volatile_v references and describing the pointer cases as partial specializations without changing the stated pointer-to-function behavior.