Macro query_interface::interfaces

macro_rules! interfaces {
    (@unbracket $(($($v:tt)*))*) => { ... };
    (@inner $imp:tt $cond:tt $name:ty: $($iface:ty),+ {}) => { ... };
    (@imp ($($result:tt)*) $name:ty: $($iface:ty),+ $(where $($cond:tt)*)*) => { ... };
    (@parse < $($rest:tt)*) => { ... };
    (@parse $($rest:tt)*) => { ... };
    (@parseArg ($($result:tt)*) $name:ident , $($rest:tt)*) => { ... };
    (@parseArg ($($result:tt)*) $name:ident : $($rest:tt)*) => { ... };
    (@parseArg ($($result:tt)*) $name:ident > $($rest:tt)*) => { ... };
    (@parseBound ($($result:tt)*) $bound:tt + $($rest:tt)*) => { ... };
    (@parseBound ($($result:tt)*) $bound:tt , $($rest:tt)*) => { ... };
    (@parseBound ($($result:tt)*) $bound:tt > $($rest:tt)*) => { ... };
    (< $($rest:tt)*) => { ... };
    ($x:ty: $($rest:tt)*) => { ... };
    (@expand2 ($name:ty) ($($rest:tt)*)) => { ... };
    (@expand {$($name:ty),*} $rest:tt) => { ... };
    ({$($name:ty),*} $($rest:tt)*) => { ... };
}

Allow a set of traits to be dynamically queried from a type when it is stored as an Object trait object.

Example use:

#[derive(Clone)]
struct Foo;
interfaces!(Foo: ObjectClone);