closure-pass is a crate for passing arguments to a closure with capture feature of C++ lambdas.

Usage

So far, this crate requires two nightly features: stmt_expr_attributes and proc_macro_hygiene. Usage is pretty straightforward, the following code:

let a = /*..*/;
let b = /*..*/;

#[closure_pass(a, b = b.f()]
move || {
    // ..
}

Will expand to something like:

let a = /*..*/;
let b = /*..*/;

{
    let a = a.clone();
    let b = b.f();
    move || {
        // ..
    }
}