[libc++][NFCI] Remove uses of _LIBCPP_INLINE_VAR
All supported compilers provide support for inline variables in C++17 now.
Also, as a fly-by fix, replace some uses of _LIBCPP_CONSTEXPR by just
constexpr.
The only exception in this patch is `std::ignore`, which is provided
prior to C++17. Since it is defined in an anonymous namespace, it always
has internal linkage anyway, so using an inline variable there doesn't
provide any benefit. Instead, `inline` was removed entirely on `std::ignore`.
Differential Revision: https://reviews.llvm.org/D110243
NOKEYCHECK=True
GitOrigin-RevId: cb793e1a3655b8a571cb621db9d221c46f32ba9f
diff --git a/include/tuple b/include/tuple
index 01073e6..93b6e60 100644
--- a/include/tuple
+++ b/include/tuple
@@ -1250,7 +1250,7 @@
};
namespace {
- _LIBCPP_INLINE_VAR constexpr __ignore_t<unsigned char> ignore = __ignore_t<unsigned char>();
+ constexpr __ignore_t<unsigned char> ignore = __ignore_t<unsigned char>();
}
template <class... _Tp>
@@ -1525,7 +1525,7 @@
#if _LIBCPP_STD_VER > 14
template <class _Tp>
-_LIBCPP_INLINE_VAR constexpr size_t tuple_size_v = tuple_size<_Tp>::value;
+inline constexpr size_t tuple_size_v = tuple_size<_Tp>::value;
#define _LIBCPP_NOEXCEPT_RETURN(...) noexcept(noexcept(__VA_ARGS__)) { return __VA_ARGS__; }