1 use clippy_utils::diagnostics::span_lint;
2 use clippy_utils::is_ty_param_diagnostic_item;
3 use rustc_hir::{self as hir, def_id::DefId, QPath};
4 use rustc_lint::LateContext;
5 use rustc_span::symbol::sym;
7 use super::OPTION_OPTION;
9 pub(super) fn check(cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>, qpath: &QPath<'_>, def_id: DefId) -> bool {
10 if cx.tcx.is_diagnostic_item(sym::option_type, def_id)
11 && is_ty_param_diagnostic_item(cx, qpath, sym::option_type).is_some()
17 "consider using `Option<T>` instead of `Option<Option<T>>` or a custom \
18 enum if you need to distinguish all 3 cases",