[llvm-branch-commits] [libc++] Annotate classes with _LIBCXX_PFP to enable pointer field protection (PR #151652)

[Peter Collingbourne via llvm-branch-commits]

pcc wrote:

> What is the reasoning behind this? Could we document something when to apply the attribute?

I added this to types which are commonly used, as mentioned in the commit message. I will document that in the coding guidelines.

https://github.com/llvm/llvm-project/pull/151652