cpp14

Describe the bug
When compiler flags are such that __FILE__ macro is replaced with a relative file path (on MSVC no /Z7, /Zi or /ZI and no /FC) then it might be replaced with just a filename with no path separators. In this case tags for tests with --filenames-as-tags do not contain '#' symbol.

The bug is present in the 2.x branch, but not in the main branch where the relevant code has

There is constexpr, consteval but constinit is not described.
It could be worth to add it.

First of all, great library!

I am having some confusion in understanding the role of values_first2 in set_difference_by_key as mentioned here.

In general terms, the result of set difference D = A - B will not contain values from B therefore values_first2 can never be part of D. So `val

I would like to be able to determine my device-wide primitive's temp_storage_bytes before I have all of the primitive's arguments ready. The interface for obtaining it ostensibly requires everything to be ready for the actual run - and the documentation does not make it clear what arguments it actually needs and what it's going to do with them (e.g. will it look at the input at all, in any way? Pr

This is for first-time-contributors :
Add functions which belong to a particular header file in its corresponding .md file inside the header folder.
For example
std::sort belongs to algorithm header file, so make a new file sort.md inside the algorithm directory while maintaining the CONTIBUTING gu