Show HN: Shy – A Shunting Yard Rules Engine in Rust

These toy-intepreters are very useful for putting scripting support in your applications.

I recently wrote something similar for allowing evaluation to be applied to arbitrary golang objects/structures - so that I could write simple scripts rather than hard-coding logic in my application.

With only a few primitives it becomes very useful!

https://github.com/skx/evalfilter