clown

An approximation of "capture-by-clone" lambdas in Rust.
Requires nightly and #![feature(proc_macro_hygiene, stmt_expr_attributes)]

Turns this:

#[clown] || do_call(honk!(foo.bar))

into this:

{
    let __honk_0 = ::core::clone::Clone::clone(&foo.bar);
    move || do_call(__honk_0)
}