[][src]Function rustc::ty::is_impl_trait_defn

pub fn is_impl_trait_defn(tcx: TyCtxt, def_id: DefId) -> Option<DefId>
🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Yields the parent function's DefId if def_id is an impl Trait definition