const_destructure_tuple

const_destructure

Macro const_destructure_tuple 

Source 
macro_rules! const_destructure_tuple {
    (let ($($var:ident),*) = $value:expr) => { ... };
    (@impl (); ($($index_rest:tt),*) => ($($ty:tt),*); let ($($index:tt: $var:ident),*) = $value:expr) => { ... };
    (@impl ($var_head:ident $(,$var_tail:ident)*); () => ($($ty:tt),*); let ($($index:tt: $var:ident),*) = $value:expr) => { ... };
    (@impl ($var_head:ident $(,$var_tail:ident)*); ($index_head:tt $(,$index_tail:tt)*) => ($($ty:tt),*); let ($($index:tt: $var:ident),*) = $value:expr) => { ... };
}