Dev twon allocator pointer

[Twon]

No description provided.

[Twon]

This could use tests. Something like https://www.boost.org/doc/libs/1_83_0/doc/html/interprocess/offset_ptr.html would be idea to demonstrate this works.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (bfbd46e) 100.00% compared to head (dfe53a7) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #103   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            4         4           
  Lines          474       474           
=========================================
  Hits           474       474           

Files	Coverage Δ
indirect.h	100.00% <100.00%> (ø)
polymorphic.h	100.00% <100.00%> (ø)

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[jbcoe]

Testing this is non-trivial so I'd defer for now.

[Ukilele]

At least line 58 T* mem = allocator_traits::allocate(alloc_, 1); will fail to compile as we still expect a T* and not a allocator_traits::pointer.

[Twon]

Testing this is non-trivial so I'd defer for now.

I'm going to add a branch using Conan to fetch boost so that I can at least test this again boost::interprocess::offset_ptr to flush out all of the issues like the one @Ukilele has raised. We won't check in these changes, but we can at least verify we've updated all of the places that should be using pointer

[jbcoe]

Does this PR need accompanying wording changes? If so, we need these very soon.

[Twon]

Does this PR need accompanying wording changes? If so, we need these very soon.

I believe the wording in the draft is now updated. Please take a look and make sure you are happy with it. We should get this checked in but this still needs further testing against boost interprocess allocators there are compiler errors to resolve in the test branch.

[jbcoe]

Great work. Approved with minor tweaks to whitespace.