Sergey Kopienko

> > I think alternative approach available too: #1548 My assumption that better to include all required headers to have all required and used definition. Because lazy define initialization you...

In this PR we have a lot of destructors, declared as `= default`. I understand why we need that in case when destructor also declared as `virtual`. But for that...

> > The second concern - there are many files on each std range. Each file checks just one part of functionality of the range. > > as an example,...

Probably after merge the PR https://github.com/oneapi-src/oneDPL/pull/1250 this issue isn't actual. @danhoeflinger, @kboyarinov how do you thinks?