Function rustc::traits::overlapping_impls

pub fn overlapping_impls<'cx, 'gcx, 'tcx>(infcx: &InferCtxt<'cx, 'gcx, 'tcx>, impl1_def_id: DefId, impl2_def_id: DefId) -> Option<ImplHeader<'tcx>>

Unstable (rustc_private)

If there are types that satisfy both impls, returns a suitably-freshened ImplHeader with those types substituted