for run preprocessor code write preprocessor directives
You can use define(C++ like)
#define RickRoll println
RickRoll("Rick Astley")
You can include funcs and classes from another file
#include "test.fels"
You can install library from github repository using:
#linklude "Buffer.fels"
#linklude - install and include file from repos
You can create region:
#region reg
/*
You code
*/
#endregion reg
#define var 60
println(var)
#error this is simple error
Lets run Linux cmd command:
#cmdc ls