Macro strom::followed_by

macro_rules! followed_by {
    ($src:expr, $pat:ident!($($args:tt)*), $pat2:ident!($($args2:tt)*)) => { ... };
    ($src:expr, $pat:path, $pat2:ident!($($args2:tt)*)) => { ... };
    ($src:expr, $pat:ident!($($args:tt)*), $pat2:path) => { ... };
    ($src:expr, $pat:path, $pat2:path) => { ... };
}