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libstdc++: Add conditional noexcept to remaining range access functions

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Add conditional noexcept to the remaining range access functions that
were not changed in r15-5669-g8692cb10e82e72. This is now being proposed
for C++26 by P3623R0 (not published yet).

libstdc++-v3/ChangeLog:

	* include/bits/range_access.h (rbegin, rend, crbegin, crend):
	Add conditional noexcept, as per P3623R0.
	* testsuite/24_iterators/headers/iterator/range_access.cc: Add
	noexcept-specifier to rbegin, rend, crbegin and crend
	declarations.
This commit is contained in:
Jonathan Wakely 2025-02-12 19:43:05 +00:00 • committed by Jonathan Wakely
parent 08f70200ce
commit 7bc72a3d20
No known key found for this signature in database
2 changed files with 23 additions and 17 deletions
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18
libstdc++-v3/include/bits/range_access.h
View file

@ -153,7 +153,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Container>
[[__nodiscard__, __gnu__::__always_inline__]]
inline _GLIBCXX17_CONSTEXPR auto
rbegin(_Container& __cont) -> decltype(__cont.rbegin())
rbegin(_Container& __cont) noexcept(noexcept(__cont.rbegin()))
-> decltype(__cont.rbegin())
{ return __cont.rbegin(); }
/**
@ -164,7 +165,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Container>
[[__nodiscard__, __gnu__::__always_inline__]]
inline _GLIBCXX17_CONSTEXPR auto
rbegin(const _Container& __cont) -> decltype(__cont.rbegin())
rbegin(const _Container& __cont) noexcept(noexcept(__cont.rbegin()))
-> decltype(__cont.rbegin())
{ return __cont.rbegin(); }
/**
@ -175,7 +177,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Container>
[[__nodiscard__, __gnu__::__always_inline__]]
inline _GLIBCXX17_CONSTEXPR auto
rend(_Container& __cont) -> decltype(__cont.rend())
rend(_Container& __cont) noexcept(noexcept(__cont.rend()))
-> decltype(__cont.rend())
{ return __cont.rend(); }
/**
@ -186,7 +189,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Container>
[[__nodiscard__, __gnu__::__always_inline__]]
inline _GLIBCXX17_CONSTEXPR auto
rend(const _Container& __cont) -> decltype(__cont.rend())
rend(const _Container& __cont) noexcept(noexcept(__cont.rend()))
-> decltype(__cont.rend())
{ return __cont.rend(); }
/**
@ -241,7 +245,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Container>
[[__nodiscard__, __gnu__::__always_inline__]]
inline _GLIBCXX17_CONSTEXPR auto
crbegin(const _Container& __cont) -> decltype(std::rbegin(__cont))
crbegin(const _Container& __cont) noexcept(noexcept(std::rbegin(__cont)))
-> decltype(std::rbegin(__cont))
{ return std::rbegin(__cont); }
/**
@ -252,7 +257,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Container>
[[__nodiscard__, __gnu__::__always_inline__]]
inline _GLIBCXX17_CONSTEXPR auto
crend(const _Container& __cont) -> decltype(std::rend(__cont))
crend(const _Container& __cont) noexcept(noexcept(std::rend(__cont)))
-> decltype(std::rend(__cont))
{ return std::rend(__cont); }
#endif // C++14

22
libstdc++-v3/testsuite/24_iterators/headers/iterator/range_access.cc
View file

@ -21,7 +21,7 @@
#ifdef _GLIBCXX_RELEASE
// Conditional noexcept on these functions is a libstdc++ extension
# define NOTHROW(F) noexcept(noexcept(c.F()))
# define NOTHROW(F) noexcept(noexcept(F))
#else
# define NOTHROW(F)
#endif
@ -42,17 +42,17 @@ namespace std
{
template<class C>
CONSTEXPR_17 auto
begin(C& c) NOTHROW(begin) -> decltype(c.begin());
begin(C& c) NOTHROW(c.begin()) -> decltype(c.begin());
template<class C>
CONSTEXPR_17 auto
begin(const C& c) NOTHROW(begin) -> decltype(c.begin());
begin(const C& c) NOTHROW(c.begin()) -> decltype(c.begin());
template<class C>
CONSTEXPR_17 auto
end(C& c) NOTHROW(end) -> decltype(c.end());
end(C& c) NOTHROW(c.end()) -> decltype(c.end());
template<class C>
CONSTEXPR_17 auto
end(const C& c) NOTHROW(end) -> decltype(c.end());
end(const C& c) NOTHROW(c.end()) -> decltype(c.end());
template<class T, size_t N>
CONSTEXPR_14 T*
@ -71,17 +71,17 @@ namespace std
template<class C>
CONSTEXPR_17 auto
rbegin(C& c) -> decltype(c.rbegin());
rbegin(C& c) NOTHROW(c.rbegin()) -> decltype(c.rbegin());
template<class C>
CONSTEXPR_17 auto
rbegin(const C& c) -> decltype(c.rbegin());
rbegin(const C& c) NOTHROW(c.rbegin()) -> decltype(c.rbegin());
template<class C>
CONSTEXPR_17 auto
rend(C& c) -> decltype(c.rend());
rend(C& c) NOTHROW(c.rend()) -> decltype(c.rend());
template<class C>
CONSTEXPR_17 auto
rend(const C& c) -> decltype(c.rend());
rend(const C& c) NOTHROW(c.rend()) -> decltype(c.rend());
template<class T, size_t N>
CONSTEXPR_17 reverse_iterator<T*>
@ -99,9 +99,9 @@ namespace std
template<class C>
CONSTEXPR_17 auto
crbegin(const C& c) -> decltype(std::rbegin(c));
crbegin(const C& c) NOTHROW(std::rbegin(c)) -> decltype(std::rbegin(c));
template<class C>
CONSTEXPR_17 auto
cend(const C& c) -> decltype(std::rend(c));
cend(const C& c) NOTHROW(std::rend(c)) -> decltype(std::rend(c));
#endif // C++14
}