[feature request] allow to specify operator precedence order

[thomas725]

Hi there!

thank you for your library, I'm using it in my smart home solution (with a user count = 1 = me ;))
See also: https://gitlab.com/thomas351/rust-influxdb-udp-logger/-/commit/879aff808dcdd6cebf2dc9782eb61495a8fc4560

I'd like to request a feature that would enable to modify the order in which operators are processed instead of all of them at the same time (left to right).

[Canop]

It probably won't come soon, I have too many issues on my TODO list right now.