Function gluon::import::add_extern_module

pub fn add_extern_module<F>(thread: &Thread, name: &str, loader: F)
where
    F: Fn(&Thread) -> Result<ExternModule> + Send + Sync + 'static,

Adds an extern module to thread, letting it be loaded with import! name from gluon code.

use gluon::vm::{self, ExternModule};
use gluon::{primitive, record, Thread, ThreadExt};
use gluon::import::add_extern_module;

fn yell(s: &str) -> String {
    s.to_uppercase()
}

fn my_module(thread: &Thread) -> vm::Result<ExternModule> {
    ExternModule::new(
        thread,
        record!{
            message => "Hello World!",
            yell => primitive!(1, yell)
        }
    )
}

#[tokio::main]
async fn main() -> gluon::Result<()> {
    let thread = gluon::new_vm_async().await;
    add_extern_module(&thread, "my_module", my_module);
    let script = r#"
        let module = import! "my_module"
        module.yell module.message
    "#;
    let (result, _) = thread.run_expr_async::<String>("example", script).await?;
    assert_eq!(result, "HELLO WORLD!");
    Ok(())
}