Function rustc_mir_build::thir::pattern::pat_from_hir

pub(crate) fn pat_from_hir<'a, 'tcx>(
    tcx: TyCtxt<'tcx>, 
    param_env: ParamEnv<'tcx>, 
    typeck_results: &'a TypeckResults<'tcx>, 
    pat: &'tcx Pat<'tcx>
) -> Pat<'tcx>