Modules and Imports

All files in QangLang are modules. Modules are declared using the mod keyword and path to the module is provided with the import keyword.

mod lib = import("./lib.ql");

When a module is imported the first time, it is executed and cached.

lib.ql

println("Library imported!");

main.ql

mod lib = import("./lib.ql"); // "Library imported!"

fn main() {
  mod lib = import("./lib.ql");
}

main(); // Nothing prints because the lib.ql has already executed.

Modules are also readonly, so a field on a module cannot be reassigned.

mod math = import("./math.ql");

math.sqrt = identity; // This is an error because math.sqrt cannot be reassigned.