[libc-commits] [libc] [libc] Implement vasprintf (PR #98824)

[Michael Jones via libc-commits]

michaelrj-google wrote:

I think the overall idea is good, but I don't think that `WriteBuffer` needs to be refactored for this. It should be possible to add this with minimal changes to `WriteBuffer`.

https://github.com/llvm/llvm-project/pull/98824