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Update emplace() to no longer needlessly rebind its allocator

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This commit is contained in:
Christian Mazakas
2023-03-02 15:47:18 -08:00
parent 5c63cd2bdb
commit 45d6c07be6
1 changed files with 2 additions and 12 deletions
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14
include/boost/unordered/detail/foa.hpp
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@ -1449,22 +1449,12 @@ public:
emplace_type,element_type
>::type;
using alloc_insert_type=typename std::conditional<
std::is_constructible<
value_type,emplace_type>::value,
emplace_type,value_type
>::type;
using alloc_type=
typename boost::allocator_rebind<Allocator,alloc_insert_type>::type;
storage<insert_type> s;
alloc_type alloc{al()};
auto *p=std::addressof(s.t_);
type_policy::construct(alloc,p,std::forward<Args>(args)...);
type_policy::construct(al(),p,std::forward<Args>(args)...);
drop_guard<type_policy,alloc_type,insert_type> guard{alloc,p};
drop_guard<type_policy,Allocator,insert_type> guard{al(),p};
return emplace_impl(type_policy::move(*p));
}