Macro namable_closures::call

macro_rules! call {
    (ref $c:ident ()) => { ... };
    (ref $c:ident ($arg:expr)) => { ... };
    (ref $c:ident ($arg1:expr,$($arg2:expr),+)) => { ... };
    (mut $c:ident ()) => { ... };
    (mut $c:ident ($arg:expr)) => { ... };
    (mut $c:ident ($arg1:expr,$($arg2:expr),+)) => { ... };
    ($c:ident ()) => { ... };
    ($c:ident ($arg:expr)) => { ... };
    ($c:ident ($arg1:expr,$($arg2:expr),+)) => { ... };
}