[libc-commits] [libc] [libc][CPP] Add vector container and unit tests (PR #222972)

[Alexey Samsonov via libc-commits]

vonosmas wrote:

I'll let @kaladron follow-up, but I feel that we were able to get far w/o explicit memory management, but we've started hitting the functions where avoiding dynamic reallocation and `realloc` is tough. E.g. we didn't do any memory management for `<pwd.h>` functions, but `<grp.h>` ones are materially different. There's also upcoming `scandir` from `<dirent.h>`, and probably `glob()`.

https://github.com/llvm/llvm-project/pull/222972