macro_rules! __known_path {
(core :: iter :: IntoIterator) => { ... };
(core :: iter :: Iterator) => { ... };
(core :: result :: Result) => { ... };
(core :: option :: Option) => { ... };
(core :: ops :: Range) => { ... };
(core :: ops :: RangeFrom) => { ... };
(core :: ops :: RangeFull) => { ... };
(core :: ops :: RangeTo) => { ... };
(core :: ops :: RangeToInclusive) => { ... };
(core :: ops :: RangeInclusive) => { ... };
(core :: future :: Future) => { ... };
(core :: ops :: Try) => { ... };
($path : path) => { ... };
}