[llvm-branch-commits] [clang] [Clang] [C++26] Expansion Statements (Part 10: Expansion Limit) (PR #169689)

[Corentin Jabot via llvm-branch-commits]

https://github.com/cor3ntin commented:

Is an actual performance concern here?

Unlike recursive things it's bound to terminate, and it's not adding recursion in itself  - the limit from the compiler perspective is the number of instantiations / objects in the declaration context.

I expect people will want to iterate over the member of `::` or `::std` and expect that to somehow work.

So i think this is fine for now but we will probably have to adjust with use cases

https://github.com/llvm/llvm-project/pull/169689