[libc-commits] [libc] [llvm] [libc] Add user defined literals to ease testing (PR #81267)

[Nick Desaulniers via libc-commits]

https://github.com/nickdesaulniers approved this pull request.

Cool, yeah sounds useful in multiple places then. Consider adding more context to the commit description.

https://github.com/llvm/llvm-project/pull/81267