modify code

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

diff --git a/clippy_lints/src/redundant_slicing.rs b/clippy_lints/src/redundant_slicing.rs
index 9c6cd7b4fa625f0200a16891a1ac4ea7331b22dd..7c88b42ea3199a771b40f5692f95923cf6928fa6 100644 (file)
--- a/clippy_lints/src/redundant_slicing.rs
+++ b/clippy_lints/src/redundant_slicing.rs
@@ -1,7 +1,7 @@
 use clippy_utils::diagnostics::span_lint_and_sugg;
+use clippy_utils::get_parent_expr;
 use clippy_utils::source::snippet_with_context;
 use clippy_utils::ty::is_type_lang_item;
-use clippy_utils::{get_parent_expr, in_macro};
 use if_chain::if_chain;
 use rustc_errors::Applicability;
 use rustc_hir::{BorrowKind, Expr, ExprKind, LangItem, Mutability};
@@ -10,17 +10,19 @@
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 
 declare_clippy_lint! {
-    /// **What it does:** Checks for redundant slicing expressions which use the full range, and
+    /// ### What it does
+    /// Checks for redundant slicing expressions which use the full range, and
     /// do not change the type.
     ///
-    /// **Why is this bad?** It unnecessarily adds complexity to the expression.
+    /// ### Why is this bad?
+    /// It unnecessarily adds complexity to the expression.
     ///
-    /// **Known problems:** If the type being sliced has an implementation of `Index<RangeFull>`
+    /// ### Known problems
+    /// If the type being sliced has an implementation of `Index<RangeFull>`
     /// that actually changes anything then it can't be removed. However, this would be surprising
     /// to people reading the code and should have a note with it.
     ///
-    /// **Example:**
-    ///
+    /// ### Example
     /// ```ignore
     /// fn get_slice(x: &[u32]) -> &[u32] {
     ///     &x[..]
@@ -32,6 +34,7 @@
     ///     x
     /// }
     /// ```
+    #[clippy::version = "1.51.0"]
     pub REDUNDANT_SLICING,
     complexity,
     "redundant slicing of the whole range of a type"
@@ -39,9 +42,9 @@
 
 declare_lint_pass!(RedundantSlicing => [REDUNDANT_SLICING]);
 
-impl LateLintPass<'_> for RedundantSlicing {
+impl<'tcx> LateLintPass<'tcx> for RedundantSlicing {
     fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
-        if in_macro(expr.span) {
+        if expr.span.from_expansion() {
             return;
         }