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PR 70564 disambiguate constructors for not_fn call wrapper

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PR libstdc++/70564
	* include/experimental/functional (_Not_fn): Remove.
	(not_fn): Use std::_Not_fn.
	* include/std/functional (_Not_fn): Add second parameter to
	disambiguate copying from initialization by not_fn. Define for C++14.
	(not_fn): Add second argument to initialization.
	* testsuite/20_util/not_fn/1.cc: Copy call wrapper using
	direct-initialization.

From-SVN: r240778
This commit is contained in:
Jonathan Wakely 2016-10-05 13:01:36 +01:00 committed by Jonathan Wakely
parent 496326bcc1
commit 78ec9c15be
5 changed files with 40 additions and 66 deletions
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11
libstdc++-v3/ChangeLog
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@ -1,3 +1,14 @@
2016-10-05 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/70564
* include/experimental/functional (_Not_fn): Remove.
(not_fn): Use std::_Not_fn.
* include/std/functional (_Not_fn): Add second parameter to
disambiguate copying from initialization by not_fn. Define for C++14.
(not_fn): Add second argument to initialization.
* testsuite/20_util/not_fn/1.cc: Copy call wrapper using
direct-initialization.
2016-10-03 François Dumont <fdumont@gcc.gnu.org> 2016-10-03 François Dumont <fdumont@gcc.gnu.org>
* src/c++11/shared_ptr.cc (mask, invalid, get_mutex): Move * src/c++11/shared_ptr.cc (mask, invalid, get_mutex): Move

53
libstdc++-v3/include/experimental/functional
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@ -378,64 +378,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
#define __cpp_lib_experimental_not_fn 201406 #define __cpp_lib_experimental_not_fn 201406
/// Generalized negator.
template<typename _Fn>
class _Not_fn
{
_Fn _M_fn;
public:
template<typename _Fn2>
explicit
_Not_fn(_Fn2&& __fn)
: _M_fn(std::forward<_Fn2>(__fn)) { }
_Not_fn(const _Not_fn& __fn) = default;
_Not_fn(_Not_fn&& __fn) = default;
~_Not_fn() = default;
template<typename... _Args>
auto
operator()(_Args&&... __args) &
noexcept(__is_nothrow_callable<_Fn&(_Args&&...)>::value)
-> decltype(!std::declval<result_of_t<_Fn&(_Args&&...)>>())
{ return !std::__invoke(_M_fn, std::forward<_Args>(__args)...); }
template<typename... _Args>
auto
operator()(_Args&&... __args) const &
noexcept(__is_nothrow_callable<const _Fn&(_Args&&...)>::value)
-> decltype(!std::declval<result_of_t<const _Fn&(_Args&&...)>>())
{ return !std::__invoke(_M_fn, std::forward<_Args>(__args)...); }
template<typename... _Args>
auto
operator()(_Args&&... __args) &&
noexcept(__is_nothrow_callable<_Fn&&(_Args&&...)>::value)
-> decltype(!std::declval<result_of_t<_Fn&&(_Args&&...)>>())
{
return !std::__invoke(std::move(_M_fn),
std::forward<_Args>(__args)...);
}
template<typename... _Args>
auto
operator()(_Args&&... __args) const &&
noexcept(__is_nothrow_callable<const _Fn&&(_Args&&...)>::value)
-> decltype(!std::declval<result_of_t<const _Fn&&(_Args&&...)>>())
{
return !std::__invoke(std::move(_M_fn),
std::forward<_Args>(__args)...);
}
};
/// [func.not_fn] Function template not_fn /// [func.not_fn] Function template not_fn
template<typename _Fn> template<typename _Fn>
inline auto inline auto
not_fn(_Fn&& __fn) not_fn(_Fn&& __fn)
noexcept(std::is_nothrow_constructible<std::decay_t<_Fn>, _Fn&&>::value) noexcept(std::is_nothrow_constructible<std::decay_t<_Fn>, _Fn&&>::value)
{ {
return _Not_fn<std::decay_t<_Fn>>{std::forward<_Fn>(__fn)}; return std::_Not_fn<std::decay_t<_Fn>>{std::forward<_Fn>(__fn), 0};
} }
_GLIBCXX_END_NAMESPACE_VERSION _GLIBCXX_END_NAMESPACE_VERSION

28
libstdc++-v3/include/std/functional
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@ -2139,19 +2139,14 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
swap(function<_Res(_Args...)>& __x, function<_Res(_Args...)>& __y) noexcept swap(function<_Res(_Args...)>& __x, function<_Res(_Args...)>& __y) noexcept
{ __x.swap(__y); } { __x.swap(__y); }
#if __cplusplus >= 201402L
#if __cplusplus > 201402L /// Generalized negator.
#define __cpp_lib_not_fn 201603
/// Generalized negator.
template<typename _Fn> template<typename _Fn>
class _Not_fn class _Not_fn
{ {
public: public:
template<typename _Fn2> template<typename _Fn2>
explicit _Not_fn(_Fn2&& __fn, int)
_Not_fn(_Fn2&& __fn)
: _M_fn(std::forward<_Fn2>(__fn)) { } : _M_fn(std::forward<_Fn2>(__fn)) { }
_Not_fn(const _Not_fn& __fn) = default; _Not_fn(const _Not_fn& __fn) = default;
@ -2161,21 +2156,21 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
template<typename... _Args> template<typename... _Args>
auto auto
operator()(_Args&&... __args) & operator()(_Args&&... __args) &
noexcept(is_nothrow_callable_v<_Fn&(_Args&&...)>) noexcept(__is_nothrow_callable<_Fn&(_Args&&...)>::value)
-> decltype(!std::declval<result_of_t<_Fn&(_Args&&...)>>()) -> decltype(!std::declval<result_of_t<_Fn&(_Args&&...)>>())
{ return !std::__invoke(_M_fn, std::forward<_Args>(__args)...); } { return !std::__invoke(_M_fn, std::forward<_Args>(__args)...); }
template<typename... _Args> template<typename... _Args>
auto auto
operator()(_Args&&... __args) const & operator()(_Args&&... __args) const &
noexcept(is_nothrow_callable_v<const _Fn&(_Args&&...)>) noexcept(__is_nothrow_callable<const _Fn&(_Args&&...)>::value)
-> decltype(!std::declval<result_of_t<const _Fn&(_Args&&...)>>()) -> decltype(!std::declval<result_of_t<const _Fn&(_Args&&...)>>())
{ return !std::__invoke(_M_fn, std::forward<_Args>(__args)...); } { return !std::__invoke(_M_fn, std::forward<_Args>(__args)...); }
template<typename... _Args> template<typename... _Args>
auto auto
operator()(_Args&&... __args) && operator()(_Args&&... __args) &&
noexcept(is_nothrow_callable_v<_Fn&&(_Args&&...)>) noexcept(__is_nothrow_callable<_Fn&&(_Args&&...)>::value)
-> decltype(!std::declval<result_of_t<_Fn&&(_Args&&...)>>()) -> decltype(!std::declval<result_of_t<_Fn&&(_Args&&...)>>())
{ {
return !std::__invoke(std::move(_M_fn), return !std::__invoke(std::move(_M_fn),
@ -2185,7 +2180,7 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
template<typename... _Args> template<typename... _Args>
auto auto
operator()(_Args&&... __args) const && operator()(_Args&&... __args) const &&
noexcept(is_nothrow_callable_v<const _Fn&&(_Args&&...)>) noexcept(__is_nothrow_callable<const _Fn&&(_Args&&...)>::value)
-> decltype(!std::declval<result_of_t<const _Fn&&(_Args&&...)>>()) -> decltype(!std::declval<result_of_t<const _Fn&&(_Args&&...)>>())
{ {
return !std::__invoke(std::move(_M_fn), return !std::__invoke(std::move(_M_fn),
@ -2195,6 +2190,11 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
private: private:
_Fn _M_fn; _Fn _M_fn;
}; };
#endif // C++14
#if __cplusplus > 201402L
#define __cpp_lib_not_fn 201603
/// [func.not_fn] Function template not_fn /// [func.not_fn] Function template not_fn
template<typename _Fn> template<typename _Fn>
@ -2202,7 +2202,7 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
not_fn(_Fn&& __fn) not_fn(_Fn&& __fn)
noexcept(std::is_nothrow_constructible<std::decay_t<_Fn>, _Fn&&>::value) noexcept(std::is_nothrow_constructible<std::decay_t<_Fn>, _Fn&&>::value)
{ {
return _Not_fn<std::decay_t<_Fn>>{std::forward<_Fn>(__fn)}; return _Not_fn<std::decay_t<_Fn>>{std::forward<_Fn>(__fn), 0};
} }
// Searchers // Searchers
@ -2515,7 +2515,7 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
return std::make_pair(__last, __last); return std::make_pair(__last, __last);
} }
#endif #endif // C++17
_GLIBCXX_END_NAMESPACE_VERSION _GLIBCXX_END_NAMESPACE_VERSION
} // namespace std } // namespace std

7
libstdc++-v3/testsuite/20_util/not_fn/1.cc
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@ -84,6 +84,12 @@ test04()
VERIFY( not_fn(f)(d) ); VERIFY( not_fn(f)(d) );
} }
void
test05()
{
auto nf{ std::not_fn([] { return false; }) };
}
int int
main() main()
{ {
@ -91,4 +97,5 @@ main()
test02(); test02();
test03(); test03();
test04(); test04();
test05();
} }

7
libstdc++-v3/testsuite/experimental/functional/not_fn.cc
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@ -84,6 +84,12 @@ test04()
VERIFY( not_fn(f)(d) ); VERIFY( not_fn(f)(d) );
} }
void
test05()
{
auto nf{ not_fn([] { return false; }) };
}
int int
main() main()
{ {
@ -91,4 +97,5 @@ main()
test02(); test02();
test03(); test03();
test04(); test04();
test05();
} }