rlua 0.14.2

High level bindings to Lua 5.3
Documentation 
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extern crate rlua;

use rlua::*;

fn main() {
    struct Test {
        field: i32,
    }

    let lua = Lua::new();
    lua.scope(|scope| {
        let mut inner: Option<Table> = None;
        let f = scope
            .create_function_mut(move |lua, t: Table| {
                //~^ error: cannot infer an appropriate lifetime for autoref due to conflicting requirements
                if let Some(old) = inner.take() {
                    // Access old callback `Lua`.
                }
                inner = Some(t);
                Ok(())
            })
            .unwrap();
        f.call::<_, ()>(lua.create_table()).unwrap();
    });
}