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uses_allocator.h (__uses_allocator_helper): Simplify.

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* include/bits/uses_allocator.h (__uses_allocator_helper): Simplify.
	(__uses_allocator_arg): Remove unused type.
	(__uses_alloc0): Turn into a trivial type.
	(__uses_alloc): Add missing template parameter in primary template.
	(__uses_alloc_impl): Rename to __uses_alloc_t.

From-SVN: r211121
This commit is contained in:
Jonathan Wakely 2014-06-01 23:35:42 +01:00 • committed by Jonathan Wakely
parent 54dbf90c37
commit 314efb66cf
2 changed files with 20 additions and 17 deletions
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6
libstdc++-v3/ChangeLog
View file

@ -19,6 +19,12 @@
Likewise.
* testsuite/experimental/string_view/operations/to_string/1.cc: New.
* include/bits/uses_allocator.h (__uses_allocator_helper): Simplify.
(__uses_allocator_arg): Remove unused type.
(__uses_alloc0): Turn into a trivial type.
(__uses_alloc): Add missing template parameter in primary template.
(__uses_alloc_impl): Rename to __uses_alloc_t.
2014-05-30 Jonathan Wakely <jwakely@redhat.com>
* testsuite/lib/libstdc++.exp (libstdc++_init): Adjust regexp to

31
libstdc++-v3/include/bits/uses_allocator.h
View file

@ -45,35 +45,33 @@ _GLIBCXX_HAS_NESTED_TYPE(allocator_type)
template<typename _Tp, typename _Alloc,
bool = __has_allocator_type<_Tp>::value>
struct __uses_allocator_helper
: public false_type { };
: false_type { };
template<typename _Tp, typename _Alloc>
struct __uses_allocator_helper<_Tp, _Alloc, true>
: public integral_constant<bool, is_convertible<_Alloc,
typename _Tp::allocator_type>::value>
: is_convertible<_Alloc, typename _Tp::allocator_type>::type
{ };
/// [allocator.uses.trait]
template<typename _Tp, typename _Alloc>
struct uses_allocator
: public integral_constant<bool,
__uses_allocator_helper<_Tp, _Alloc>::value>
: __uses_allocator_helper<_Tp, _Alloc>::type
{ };
template<typename _Tp, typename _Alloc, typename... _Args>
struct __uses_allocator_arg
: is_constructible<_Tp, _Alloc, _Args...>
{ static_assert( uses_allocator<_Tp, _Alloc>::value, "uses allocator" ); };
struct __uses_alloc_base { };
struct __uses_alloc0 : __uses_alloc_base
{ struct _Anything { _Anything(...) { } } _M_a; };
{
struct _Sink { void operator=(const void*) { } } _M_a;
};
template<typename _Alloc>
struct __uses_alloc1 : __uses_alloc_base { const _Alloc* _M_a; };
template<typename _Alloc>
struct __uses_alloc2 : __uses_alloc_base { const _Alloc* _M_a; };
template<bool, typename _Alloc, typename... _Args>
template<bool, typename _Tp, typename _Alloc, typename... _Args>
struct __uses_alloc;
template<typename _Tp, typename _Alloc, typename... _Args>
@ -89,15 +87,14 @@ _GLIBCXX_HAS_NESTED_TYPE(allocator_type)
: __uses_alloc0 { };
template<typename _Tp, typename _Alloc, typename... _Args>
struct __uses_alloc_impl
: __uses_alloc<uses_allocator<_Tp, _Alloc>::value, _Tp, _Alloc, _Args...>
{ };
using __uses_alloc_t =
__uses_alloc<uses_allocator<_Tp, _Alloc>::value, _Tp, _Alloc, _Args...>;
template<typename _Tp, typename _Alloc, typename... _Args>
__uses_alloc_impl<_Tp, _Alloc, _Args...>
inline __uses_alloc_t<_Tp, _Alloc, _Args...>
__use_alloc(const _Alloc& __a)
{
__uses_alloc_impl<_Tp, _Alloc, _Args...> __ret;
__uses_alloc_t<_Tp, _Alloc, _Args...> __ret;
__ret._M_a = &__a;
return __ret;
}