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Deprecate nested types in std::hash 

* include/bits/c++config (_GLIBCXX17_DEPRECATED): Define.
	* include/bits/functional_hash.h (__hash_base::result_type)
	(__hash_base::argument_type): Add _GLIBCXX17_DEPRECATED.
	* include/std/optional (hash<optional<T>>::result_type)
	(hash<optional<T>>::argument_type): Add deprecated attribute.
	(__is_fast_hash<hash<optional<T>>>): Add partial specialization.
	* include/std/variant (hash<variant<Types...>>::result_type)
	(hash<variant<Types...>>::argument_type): Add deprecated attribute.
	(__is_fast_hash<hash<variant<Types...>>>): Add partial specialization.

From-SVN: r253017
This commit is contained in:
Jonathan Wakely 2017-09-20 17:34:42 +01:00 committed by Jonathan Wakely
parent 7ba0b15a7e
commit f78958c9b4
5 changed files with 34 additions and 8 deletions
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10
libstdc++-v3/ChangeLog
View File

@ -1,5 +1,15 @@
2017-09-20 Jonathan Wakely <jwakely@redhat.com>
* include/bits/c++config (_GLIBCXX17_DEPRECATED): Define.
* include/bits/functional_hash.h (__hash_base::result_type)
(__hash_base::argument_type): Add _GLIBCXX17_DEPRECATED.
* include/std/optional (hash<optional<T>>::result_type)
(hash<optional<T>>::argument_type): Add deprecated attribute.
(__is_fast_hash<hash<optional<T>>>): Add partial specialization.
* include/std/variant (hash<variant<Types...>>::result_type)
(hash<variant<Types...>>::argument_type): Add deprecated attribute.
(__is_fast_hash<hash<variant<Types...>>>): Add partial specialization.
* libsupc++/exception_ptr.h (copy_exception): Remove deprecated
non-standard function.

7
libstdc++-v3/include/bits/c++config
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@ -77,6 +77,7 @@
// Macros for deprecated attributes.
// _GLIBCXX_USE_DEPRECATED
// _GLIBCXX_DEPRECATED
// _GLIBCXX17_DEPRECATED
#ifndef _GLIBCXX_USE_DEPRECATED
# define _GLIBCXX_USE_DEPRECATED 1
#endif
@ -87,6 +88,12 @@
# define _GLIBCXX_DEPRECATED
#endif
#if defined(__DEPRECATED) && (__cplusplus >= 201703L)
# define _GLIBCXX17_DEPRECATED [[__deprecated__]]
#else
# define _GLIBCXX17_DEPRECATED
#endif
// Macros for ABI tag attributes.
#ifndef _GLIBCXX_ABI_TAG_CXX11
# define _GLIBCXX_ABI_TAG_CXX11 __attribute ((__abi_tag__ ("cxx11")))

4
libstdc++-v3/include/bits/functional_hash.h
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@ -49,8 +49,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Result, typename _Arg>
struct __hash_base
{
typedef _Result result_type;
typedef _Arg argument_type;
typedef _Result result_type _GLIBCXX17_DEPRECATED;
typedef _Arg argument_type _GLIBCXX17_DEPRECATED;
};
/// Primary class template hash.

8
libstdc++-v3/include/std/optional
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@ -1028,10 +1028,14 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
: private __poison_hash<remove_const_t<_Tp>>,
public __optional_hash_call_base<_Tp>
{
using result_type = size_t;
using argument_type = optional<_Tp>;
using result_type [[__deprecated__]] = size_t;
using argument_type [[__deprecated__]] = optional<_Tp>;
};
template<typename _Tp>
struct __is_fast_hash<hash<optional<_Tp>>> : __is_fast_hash<hash<_Tp>>
{ };
/// @}
template <typename _Tp> optional(_Tp) -> optional<_Tp>;

13
libstdc++-v3/include/std/variant
View File

@ -1420,15 +1420,15 @@ namespace __variant
variant<_Types...>, std::index_sequence_for<_Types...>>,
public __variant_hash_call_base<_Types...>
{
using result_type = size_t;
using argument_type = variant<_Types...>;
using result_type [[__deprecated__]] = size_t;
using argument_type [[__deprecated__]] = variant<_Types...>;
};
template<>
struct hash<monostate>
{
using result_type = size_t;
using argument_type = monostate;
using result_type [[__deprecated__]] = size_t;
using argument_type [[__deprecated__]] = monostate;
size_t
operator()(const monostate& __t) const noexcept
@ -1438,6 +1438,11 @@ namespace __variant
}
};
template<typename... _Types>
struct __is_fast_hash<hash<variant<_Types...>>>
: bool_constant<(__is_fast_hash<_Types>::value && ...)>
{ };
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std