[libcxx-commits] [libcxx] [libc++] <algorithm>: __is_callable checks whether the callable can be called with rvalue (PR #73451)

[Nhat Nguyen via libcxx-commits]

changkhothuychung wrote:

@ldionne it looks like there is a bug with the use of `std::lower_bound(begin(collatenames), end(collatenames), s, use_strcmp());` in the file regex.cpp, because `use_strcmp` doesn't have a const reference operator overloading. Should we add one to that code? 

https://github.com/llvm/llvm-project/pull/73451