[llvm-branch-commits] [libcxx] [libc++][modules] Improves std.compat module. (PR #76330)

[Chuanqi Xu via llvm-branch-commits]

================
@@ -17,38 +17,17 @@ module;
 
 // The headers of Table 24: C++ library headers [tab:headers.cpp]
 // and the headers of Table 25: C++ headers for C library facilities [tab:headers.cpp.c]
-#include <algorithm>
-#include <any>
-#include <array>
-#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER)
-#  include <atomic>
-#endif
-#if !defined(_LIBCPP_HAS_NO_THREADS)
-#  include <barrier>
-#endif
-#include <bit>
-#include <bitset>
 #include <cassert>
 #include <cctype>
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ChuanqiXu9 wrote:

Let's try to remove the duplicated headers as much as possible. Maybe we can improve it by something like:

```
export module std.compat;
export import std;

export using double_t = std::double_t;
```

https://github.com/llvm/llvm-project/pull/76330