[libcxx-commits] [libcxx] [libc++] Complete `<charconv>` for 64-bit `long double` platforms (PR #117125)

[A. Jiang via libcxx-commits]

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@@ -1231,6 +1231,12 @@ typedef __char32_t char32_t;
 #    define _LIBCPP_HAS_EXPLICIT_THIS_PARAMETER 0
 #  endif
 
+#  if defined(_MSC_VER) || __SIZEOF_LONG_DOUBLE__ == __SIZEOF_DOUBLE__
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frederick-vs-ja wrote:

We're already using such condition in the test suite. I don't think we support any platform where their sizes are equal but their representations are not.

https://github.com/llvm/llvm-project/pull/117125