Macro emacs::use_symbols

macro_rules! use_symbols {
    ($($name : ident $(=> $lisp_name : expr) ?) *) => { ... };
}

Defines static &OnceGlobalRef variables that point to corresponding Lisp symbols.

This macro accepts a space-separated list of identifiers, and determine the Lisp symbol names by replacing underscores with hyphens.

It can be used only once per Rust mod.