Macro perspective_client::clone

macro_rules! clone {
    (impl @bind $i:tt { $($orig:tt)* } { }) => { ... };
    (impl @bind $i:tt { $($orig:tt)* } { $binder:tt }) => { ... };
    (impl @expand { $($orig:tt)* } { $($binder:tt)* } $i:tt) => { ... };
    (impl @expand { $($orig:tt)* } { $($binder:tt)* } $i:tt ()) => { ... };
    (impl @expand { $($orig:tt)* } { $($binder:tt)* } $i:tt . 0) => { ... };
    (impl @expand { $($orig:tt)* } { $($binder:tt)* } $i:tt . 1) => { ... };
    (impl @expand { $($orig:tt)* } { $($binder:tt)* } $i:tt . 2) => { ... };
    (impl @expand { $($orig:tt)* } { $($binder:tt)* } $i:tt . 3) => { ... };
    (impl @expand { $($orig:tt)* } { $($binder:tt)* } $i:tt = $($tail:tt)+) => { ... };
    (impl @expand { $($orig:tt)* } { $($binder:tt)* } $i:tt $($tail:tt)+) => { ... };
    (impl @context { $($orig:tt)* } $tail:tt) => { ... };
    (impl @context { $($orig:tt)* } , $($tail:tt)+) => { ... };
    (impl @context { $($orig:tt)* } $i:tt $($tail:tt)+) => { ... };
    ($($tail:tt)+) => { ... };
}

A helper to for the pattern let x2 = x; necessary to clone structs destined for an async or 'static closure stack. This is like move || { .. } or move async { .. }, but for clone semantics. clone!() works with symbols as well as properties and methods, using the last symbol name in the method chain, or an alias via x = ... syntax.

Examples

clone!(my_struct.option_method(), alias = my_struct.prop1.my_rc);
println!("These bindings exist: {:?} {:?}", option_method, alias);