modify code

[rust.git] / clippy_lints / src / partialeq_ne_impl.rs

diff --git a/clippy_lints/src/partialeq_ne_impl.rs b/clippy_lints/src/partialeq_ne_impl.rs
index 140fb392149954e0612c60cd76cd3da5a137cab3..e827cdaae8728922580a9f4e7d9fbc7cafd5b3b6 100644 (file)
--- a/clippy_lints/src/partialeq_ne_impl.rs
+++ b/clippy_lints/src/partialeq_ne_impl.rs
@@ -1,20 +1,22 @@
-use crate::utils::{is_automatically_derived, span_lint_hir};
+use clippy_utils::diagnostics::span_lint_hir;
+use clippy_utils::is_automatically_derived;
 use if_chain::if_chain;
-use rustc::lint::{LateContext, LateLintPass};
-use rustc_hir::*;
+use rustc_hir::{Impl, Item, ItemKind};
+use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
+use rustc_span::sym;
 
 declare_clippy_lint! {
-    /// **What it does:** Checks for manual re-implementations of `PartialEq::ne`.
+    /// ### What it does
+    /// Checks for manual re-implementations of `PartialEq::ne`.
     ///
-    /// **Why is this bad?** `PartialEq::ne` is required to always return the
+    /// ### Why is this bad?
+    /// `PartialEq::ne` is required to always return the
     /// negated result of `PartialEq::eq`, which is exactly what the default
     /// implementation does. Therefore, there should never be any need to
     /// re-implement it.
     ///
-    /// **Known problems:** None.
-    ///
-    /// **Example:**
+    /// ### Example
     /// ```rust
     /// struct Foo;
     ///
@@ -23,6 +25,7 @@
     ///    fn ne(&self, other: &Foo) -> bool { !(self == other) }
     /// }
     /// ```
+    #[clippy::version = "pre 1.29.0"]
     pub PARTIALEQ_NE_IMPL,
     complexity,
     "re-implementing `PartialEq::ne`"
@@ -30,20 +33,21 @@
 
 declare_lint_pass!(PartialEqNeImpl => [PARTIALEQ_NE_IMPL]);
 
-impl<'a, 'tcx> LateLintPass<'a, 'tcx> for PartialEqNeImpl {
-    fn check_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx Item<'_>) {
+impl<'tcx> LateLintPass<'tcx> for PartialEqNeImpl {
+    fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'_>) {
         if_chain! {
-            if let ItemKind::Impl(_, _, _, _, Some(ref trait_ref), _, impl_items) = item.kind;
-            if !is_automatically_derived(&*item.attrs);
+            if let ItemKind::Impl(Impl { of_trait: Some(ref trait_ref), items: impl_items, .. }) = item.kind;
+            let attrs = cx.tcx.hir().attrs(item.hir_id());
+            if !is_automatically_derived(attrs);
             if let Some(eq_trait) = cx.tcx.lang_items().eq_trait();
             if trait_ref.path.res.def_id() == eq_trait;
             then {
                 for impl_item in impl_items {
-                    if impl_item.ident.name == sym!(ne) {
+                    if impl_item.ident.name == sym::ne {
                         span_lint_hir(
                             cx,
                             PARTIALEQ_NE_IMPL,
-                            impl_item.id.hir_id,
+                            impl_item.id.hir_id(),
                             impl_item.span,
                             "re-implementing `PartialEq::ne` is unnecessary",
                         );