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Implement the first part of N4258 - allocator_traits<X>::is_always_equal. Also fixes PR#23723

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@238848 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Marshall Clow
2015-06-02 16:34:03 +00:00
parent 8731c5da46
commit f0324bcaa1
4 changed files with 91 additions and 1 deletions
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14
include/scoped_allocator
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@@ -38,6 +38,7 @@ public:
typedef see below propagate_on_container_copy_assignment;
typedef see below propagate_on_container_move_assignment;
typedef see below propagate_on_container_swap;
typedef see below is_always_equal;
template <class Tp>
struct rebind
@@ -170,6 +171,14 @@ struct __get_poc_swap<_A0, _Allocs...>
__get_poc_swap<_Allocs...>::value;
};
template <class _A0, class ..._Allocs>
struct __get_poc_always_equal<_A0, _Allocs...>
{
static const bool value =
allocator_traits<_A0>::is_always_equal::value ||
__get_poc_always_equal<_Allocs...>::value;
};
template <class ..._Allocs>
class __scoped_allocator_storage;
@@ -397,6 +406,11 @@ public:
bool,
__get_poc_swap<outer_allocator_type, _InnerAllocs...>::value
> propagate_on_container_swap;
typedef integral_constant
<
bool,
__get_poc_always_equal<outer_allocator_type, _InnerAllocs...>::value
> is_always_equal;
template <class _Tp>
struct rebind