[libcxx-commits] [libcxx] [libc++] Implement a libc++ private version of isascii (PR #122361)

[Nikolas Klauser via libcxx-commits]

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@@ -516,6 +516,8 @@ protected:
 };
 #endif // _LIBCPP_HAS_WIDE_CHARACTERS
 
+inline _LIBCPP_HIDE_FROM_ABI int __libcpp_isascii(int __c) { return (__c & ~0x7F) == 0; }
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philnik777 wrote:

That looks a lot like a C-ism to me. We're returning a boolean expression, so I don't see the harm in making the return type reflect that. We're also not making it part of the locale base API, so there isn't really a direct connection between `__libcpp_isascii` and the extension.

https://github.com/llvm/llvm-project/pull/122361