Macro def_package

macro_rules! def_package {
    ($($(#[$outer:meta])* $mod:vis $package:ident($lib:ident)
                $( : $($(#[$base_meta:meta])* $base_pkg:ty),+ )?
                $block:block
                $( |> | $engine:ident | $init_engine:block )?
    )+) => { ... };
    ($($(#[$outer:meta])* $root:ident :: $package:ident => | $lib:ident | $block:block)+) => { ... };
    ($root:ident : $package:ident : $comment:expr , $lib:ident , $block:stmt) => { ... };
}

Macro that makes it easy to define a package (which is basically a shared module) and register functions into it.

Functions can be added to the package using Module::set_native_fn.

Example

Define a package named MyPackage with a single function named my_add:

use rhai::{Dynamic, EvalAltResult};
use rhai::def_package;

fn add(x: i64, y: i64) -> Result<i64, Box<EvalAltResult>> { Ok(x + y) }

def_package! {
    /// My super-duper package.
    pub MyPackage(module) {
        // Load a native Rust function.
        module.set_native_fn("my_add", add);
    }
}