[libc-commits] [libc] [libc] add `LLVM_LIBC_CAST` macro. (PR #127319)

[Roland McGrath via libc-commits]

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@@ -47,6 +47,9 @@
 #define __NOEXCEPT throw()
 #endif
 
+#undef LLVM_LIBC_CAST
+#define LLVM_LIBC_CAST(cast, type, value) (cast<type>(value))
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frobtech wrote:

This merits a comment about its intended uses.
No macro should be defined in this file unless it's in the implementation namespace.
Sticking to the `__` prefix seems like the best convention, with the exception of the C11 keywords that are in the `_[A-Z]` part of the implementation namespace.

https://github.com/llvm/llvm-project/pull/127319