Added `clippy::version` attribute to all normal lints

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

diff --git a/clippy_lints/src/neg_cmp_op_on_partial_ord.rs b/clippy_lints/src/neg_cmp_op_on_partial_ord.rs
index 95613a1b82ef0f32101c061c696730dabea56ea7..efe31a1544187ebeec7ca98fb3e6e034272f9312 100644 (file)
--- a/clippy_lints/src/neg_cmp_op_on_partial_ord.rs
+++ b/clippy_lints/src/neg_cmp_op_on_partial_ord.rs
@@ -1,25 +1,23 @@
+use clippy_utils::diagnostics::span_lint;
+use clippy_utils::ty::implements_trait;
+use clippy_utils::{self, get_trait_def_id, paths};
 use if_chain::if_chain;
 use rustc_hir::{BinOpKind, Expr, ExprKind, UnOp};
 use rustc_lint::{LateContext, LateLintPass, LintContext};
 use rustc_middle::lint::in_external_macro;
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 
-use crate::utils::{self, paths, span_lint};
-
 declare_clippy_lint! {
-    /// **What it does:**
+    /// ### What it does
     /// Checks for the usage of negated comparison operators on types which only implement
     /// `PartialOrd` (e.g., `f64`).
     ///
-    /// **Why is this bad?**
+    /// ### Why is this bad?
     /// These operators make it easy to forget that the underlying types actually allow not only three
     /// potential Orderings (Less, Equal, Greater) but also a fourth one (Uncomparable). This is
     /// especially easy to miss if the operator based comparison result is negated.
     ///
-    /// **Known problems:** None.
-    ///
-    /// **Example:**
-    ///
+    /// ### Example
     /// ```rust
     /// use std::cmp::Ordering;
     ///
@@ -38,6 +36,7 @@
     ///     _ => false,
     /// };
     /// ```
+    #[clippy::version = "pre 1.29.0"]
     pub NEG_CMP_OP_ON_PARTIAL_ORD,
     complexity,
     "The use of negated comparison operators on partially ordered types may produce confusing code."
@@ -50,8 +49,8 @@ fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
         if_chain! {
 
             if !in_external_macro(cx.sess(), expr.span);
-            if let ExprKind::Unary(UnOp::UnNot, ref inner) = expr.kind;
-            if let ExprKind::Binary(ref op, ref left, _) = inner.kind;
+            if let ExprKind::Unary(UnOp::Not, inner) = expr.kind;
+            if let ExprKind::Binary(ref op, left, _) = inner.kind;
             if let BinOpKind::Le | BinOpKind::Ge | BinOpKind::Lt | BinOpKind::Gt = op.node;
 
             then {
@@ -59,8 +58,8 @@ fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
                 let ty = cx.typeck_results().expr_ty(left);
 
                 let implements_ord = {
-                    if let Some(id) = utils::get_trait_def_id(cx, &paths::ORD) {
-                        utils::implements_trait(cx, ty, id, &[])
+                    if let Some(id) = get_trait_def_id(cx, &paths::ORD) {
+                        implements_trait(cx, ty, id, &[])
                     } else {
                         return;
                     }
@@ -68,7 +67,7 @@ fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
 
                 let implements_partial_ord = {
                     if let Some(id) = cx.tcx.lang_items().partial_ord_trait() {
-                        utils::implements_trait(cx, ty, id, &[])
+                        implements_trait(cx, ty, id, &[])
                     } else {
                         return;
                     }
@@ -79,11 +78,11 @@ fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
                         cx,
                         NEG_CMP_OP_ON_PARTIAL_ORD,
                         expr.span,
-                        "The use of negated comparison operators on partially ordered \
-                        types produces code that is hard to read and refactor. Please \
+                        "the use of negated comparison operators on partially ordered \
+                        types produces code that is hard to read and refactor, please \
                         consider using the `partial_cmp` method instead, to make it \
-                        clear that the two values could be incomparable."
-                    )
+                        clear that the two values could be incomparable"
+                    );
                 }
             }
         }