On 09/12/24 13:22 +0100, Giuseppe D'Angelo wrote:
Hello,
This aligns __is_bitwise_relocatable with its modern meaning, that is,
checking for trivial move construction and destruction.
Looks good, thanks.
Thanks,
--
Giuseppe D'Angelo
From 0666e993066818ab0940c61d8d9539e883848b29 Mon Sep 17 00:00:00 2001
From: Giuseppe D'Angelo <giuseppe.dang...@kdab.com>
Date: Mon, 9 Dec 2024 02:11:19 +0100
Subject: [PATCH 3/6] libstdc++: port bitwise relocatable away from is_trivial
MIME-Version: 1.0
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In preparation for the deprecation of is_trivial (P3247R2).
"bitwise relocation" (or "trivial relocation" à la P1144/P2786)
doesn't need the full-fledged notion of triviality, just checking for a
trivial move constructor and a trivial destructor is sufficient.
libstdc++-v3/ChangeLog:
* include/bits/stl_uninitialized.h: Amended the
__is_bitwise_relocatable type trait.
Signed-off-by: Giuseppe D'Angelo <giuseppe.dang...@kdab.com>
---
libstdc++-v3/include/bits/stl_uninitialized.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libstdc++-v3/include/bits/stl_uninitialized.h
b/libstdc++-v3/include/bits/stl_uninitialized.h
index 2190261134e..916288352d7 100644
--- a/libstdc++-v3/include/bits/stl_uninitialized.h
+++ b/libstdc++-v3/include/bits/stl_uninitialized.h
@@ -1248,7 +1248,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// Also known as is_trivially_relocatable.
template<typename _Tp, typename = void>
struct __is_bitwise_relocatable
- : is_trivial<_Tp> { };
+ : __and_<is_trivially_move_constructible<_Tp>,
is_trivially_destructible<_Tp>> { };
template <typename _InputIterator, typename _ForwardIterator,
typename _Allocator>
--
2.34.1
