Function clippy_lints::utils::implements_trait

pub fn implements_trait<'a, 'tcx>(
    cx: &LateContext<'a, 'tcx>, 
    ty: Ty<'tcx>, 
    trait_id: DefId, 
    ty_params: &[Ty<'tcx>]
) -> bool

Check whether a type implements a trait. See also get_trait_def_id.