The long-arrow-operator is poorly implemented in most of today's compilers:

while (0 <-- count) { ... }

We're reaching out to you to support us in our mission to finally have the long-arrow-operator properly implemented in the majority of open source and free compilers:
Clang
GCC
...and many others, but mainly Clang and GCC

Find the full story here:
https://iccb.dev/posts/long-arrow-operator/