Function rustc_typeck::middle::ty::trait_of_itemUnstable
[-] [+]
[src]
pub fn trait_of_item(tcx: &ctxt, def_id: DefId) -> Option<DefId>
If the given def ID describes an item belonging to a trait (either a
default method or an implementation of a trait method), return the ID of
the trait that the method belongs to. Otherwise, return None
.