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Add temporary polyfill for foa table's assignment operator so that the definition of the allocator copy-assignment operator isn't required

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This commit is contained in:
Christian Mazakas
2022-10-03 14:47:41 -07:00
parent ddb9f370af
commit bdfe294e61
1 changed files with 19 additions and 4 deletions
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23
include/boost/unordered/detail/foa.hpp
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@ -975,16 +975,31 @@ public:
delete_arrays(arrays);
}
template <class AllocTraits>
typename std::enable_if<
!AllocTraits::propagate_on_container_copy_assignment::value,
void
>::type
copy_assign_helper(const table&) {}
template <class AllocTraits>
typename std::enable_if<
AllocTraits::propagate_on_container_copy_assignment::value,
void
>::type
copy_assign_helper(const table& x)
{
if(al()!=x.al())reserve(0);
al()=x.al();
}
table& operator=(const table& x)
{
if(this!=&x){
clear();
h()=x.h();
pred()=x.pred();
if(alloc_traits::propagate_on_container_copy_assignment::value){
if(al()!=x.al())reserve(0);
al()=x.al();
}
copy_assign_helper<alloc_traits>(x);
// TODO may shrink arrays and miss an opportunity for memory reuse
reserve(x.size());
x.for_all_elements([this](value_type* p){