id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12768	Provide intrusive unordered_set with automatic bucket management	fdegros@…	Ion Gaztañaga	"The current intrusive unordered_set and unordered_multiset containers require the user to manually take care of the bucket management.

I've written a wrapper class template that takes care of the bucket management, automatically allocating them and rehashing as the set is growing. However, writing this code is still cumbersome and tricky.

Boost intrusive would be more usable and useful if it was providing this kind of functionality out of the box.

Consider providing unordered intrusive containers with automatic bucket management. Maybe this can be done by extending the existing unordered_set and unordered_multiset through some template option, or maybe it will require an entirely new class template.

Some points to consider:

These containers should be default-constructible. A default-constructed container should be valid and empty. Ideally, the default constructor should not dynamically allocate memory. Move and swap operations should be constant-time and no-throw."	Feature Requests	new	To Be Determined	intrusive	Boost 1.63.0	Problem			fdegros@…