[C++] notes about allocator

https://vsdmars.blogspot.com/2017/10/c-allocator-template-code.html

https://howardhinnant.github.io/allocator_boilerplate.html

https://vsdmars.blogspot.com/2015/10/c17-allocatorawarecontainer-notes.html

https://vsdmars.blogspot.com/2018/06/ccppcon-2018note-allocator-is-handle-to.html

https://vsdmars.blogspot.com/2018/11/cppcon-2018-allocator-is-handle-to-heap.html

https://vsdmars.blogspot.com/2018/06/ccppcon-2018note-david-sankel-c17s-std.html

https://stackoverflow.com/questions/38010544/polymorphic-allocator-when-and-why-should-i-use-it

This is why we have [pmr]
https://vsdmars.blogspot.com/2018/11/cppcon-2016-high-performance-code-201.html

https://en.cppreference.com/w/cpp/named_req/AllocatorAwareContainer

https://en.cppreference.com/w/cpp/memory/allocator_traits