wlambda 0.8.1

WLambda is an embeddable scripting language for Rust
Documentation 
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// Copyright (c) 2020-2022 Weird Constructor <weirdconstructor@gmail.com>
// This is a part of WLambda. See README.md and COPYING for details.

/*!

  Provides a convenience macro for creating OO interfaces from
  Rust. See `set_vval_method` macro.

*/

/// This macro helps with exporting something with a more OO interface
/// instead of using a VValUserData trait implementation.
///
///```
/// use wlambda::*;
/// use wlambda::set_vval_method;
///
/// let mut ctx = EvalContext::new_default();
///
/// let some_ref = std::rc::Rc::new(std::cell::RefCell::new(10));
/// let obj = VVal::map();
///
/// set_vval_method!(obj, some_ref, get_it, None, None, _env, _argc, {
///     Ok(VVal::Int(*some_ref.borrow()))
/// });
///
/// ctx.set_global_var("I", &obj);
///
/// assert_eq!(ctx.eval("I.get_it[]").unwrap().s(), "10");
/// *some_ref.borrow_mut() += 11;
/// assert_eq!(ctx.eval("I.get_it[]").unwrap().s(), "21");
///```
#[macro_export]
macro_rules! set_vval_method {
    ($vv: expr, $obj: ident, $method: tt, $min: expr, $max: expr, $env: ident, $argc: ident, $b: block) => {
        {
            let $obj = $obj.clone();
            $vv.set_map_key_fun(&stringify!($method).to_string(),
                move |$env: &mut $crate::Env, $argc: usize| $b, $min, $max, false);
        }
    }
}