================
@@ -428,50 +630,87 @@ _LIBCPP_CONSTEXPR_SINCE_CXX20 void __split_buffer<_Tp,
_Allocator>::shrink_to_fi
}
}
-template <class _Tp, class _Allocator>
+// Need to use this because C++03 doesn't permit constexpr if :(
+template <bool>
+struct __maybe_update_sentinel;
+
+template <>
+struct __maybe_update_sentinel<true> {
+ template <class _SplitBuffer, class _DifferenceType>
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI static void
+ __update_size(_SplitBuffer& __data, _DifferenceType __d) {
+ __data.__update_sentinel(__data.size() + __d);
+ }
+
+ template <class _SplitBuffer>
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI static void
__update_end(_SplitBuffer& __data) {
+ __data.update_sentinel(__data.end() + 1);
+ }
+};
+
+template <>
+struct __maybe_update_sentinel<false> {
+ template <class _SplitBuffer, class _DifferenceType>
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI static void
__update_size(_SplitBuffer&, _DifferenceType) {}
+
+ template <class _SplitBuffer>
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI static void
__update_end(_SplitBuffer&) {}
+};
----------------
philnik777 wrote:
This looks like it should be part of the layout class. The whole point of that
is that we have a uniform interface, which we apparently don't quite have.
https://github.com/llvm/llvm-project/pull/139632
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