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* [gcc r12-5311] libstdc++: Use hidden friends for vector<bool>::reference swap overloads
@ 2021-11-16 16:43 Jonathan Wakely
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From: Jonathan Wakely @ 2021-11-16 16:43 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:59434931fb658f0a180ce3f3305cb3987ed2b56d
commit r12-5311-g59434931fb658f0a180ce3f3305cb3987ed2b56d
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Thu Nov 11 20:51:15 2021 +0000
libstdc++: Use hidden friends for vector<bool>::reference swap overloads
These swap overloads are non-standard, but are needed to make swap work
for vector<bool>::reference rvalues. They don't need to be called
explicitly, only via ADL, so hide them from normal lookup. This is what
I've proposed as the resolution to LWG 3638.
libstdc++-v3/ChangeLog:
* include/bits/stl_bvector.h (swap(_Bit_reference, _Bit_reference))
(swap(_Bit_reference, bool&), swap(bool&, _Bit_reference)):
Define as hidden friends of _Bit_reference.
Diff:
---
libstdc++-v3/include/bits/stl_bvector.h | 50 ++++++++++++++++-----------------
1 file changed, 25 insertions(+), 25 deletions(-)
diff --git a/libstdc++-v3/include/bits/stl_bvector.h b/libstdc++-v3/include/bits/stl_bvector.h
index 381c47b6132..68070685baf 100644
--- a/libstdc++-v3/include/bits/stl_bvector.h
+++ b/libstdc++-v3/include/bits/stl_bvector.h
@@ -125,36 +125,36 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
void
flip() _GLIBCXX_NOEXCEPT
{ *_M_p ^= _M_mask; }
- };
#if __cplusplus >= 201103L
- _GLIBCXX20_CONSTEXPR
- inline void
- swap(_Bit_reference __x, _Bit_reference __y) noexcept
- {
- bool __tmp = __x;
- __x = __y;
- __y = __tmp;
- }
+ _GLIBCXX20_CONSTEXPR
+ friend void
+ swap(_Bit_reference __x, _Bit_reference __y) noexcept
+ {
+ bool __tmp = __x;
+ __x = __y;
+ __y = __tmp;
+ }
- _GLIBCXX20_CONSTEXPR
- inline void
- swap(_Bit_reference __x, bool& __y) noexcept
- {
- bool __tmp = __x;
- __x = __y;
- __y = __tmp;
- }
+ _GLIBCXX20_CONSTEXPR
+ friend void
+ swap(_Bit_reference __x, bool& __y) noexcept
+ {
+ bool __tmp = __x;
+ __x = __y;
+ __y = __tmp;
+ }
- _GLIBCXX20_CONSTEXPR
- inline void
- swap(bool& __x, _Bit_reference __y) noexcept
- {
- bool __tmp = __x;
- __x = __y;
- __y = __tmp;
- }
+ _GLIBCXX20_CONSTEXPR
+ friend void
+ swap(bool& __x, _Bit_reference __y) noexcept
+ {
+ bool __tmp = __x;
+ __x = __y;
+ __y = __tmp;
+ }
#endif
+ };
struct _Bit_iterator_base
: public std::iterator<std::random_access_iterator_tag, bool>
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