[libcxx-commits] [libcxx] [libc++] LWG3187: P0591R4 reverted DR 2586 fixes to `scoped_allocator_adaptor::construct()` (PR #152424)

[A. Jiang via libcxx-commits]

frederick-vs-ja wrote:

> I think we should rather modify the utilities to have the required behaviour in C++17.

Oh, for `scoped_allocator_adaptor` we need the mechanisms working in C++11 mode. It would be quite non-trivial to rework them for C++11, as (at least) Clang doesn't seem to accept using deduced return types in C++11 mode.

https://github.com/llvm/llvm-project/pull/152424