modify code

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

diff --git a/clippy_lints/src/double_parens.rs b/clippy_lints/src/double_parens.rs
index abbcaf43f4151adcdfc44c0954d6e797531667f4..e10f740d24a4193d4c141b7c1f1e96a12239353f 100644 (file)
--- a/clippy_lints/src/double_parens.rs
+++ b/clippy_lints/src/double_parens.rs
@@ -1,17 +1,17 @@
-use crate::utils::span_lint;
+use clippy_utils::diagnostics::span_lint;
 use rustc_ast::ast::{Expr, ExprKind};
 use rustc_lint::{EarlyContext, EarlyLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 
 declare_clippy_lint! {
-    /// **What it does:** Checks for unnecessary double parentheses.
+    /// ### What it does
+    /// Checks for unnecessary double parentheses.
     ///
-    /// **Why is this bad?** This makes code harder to read and might indicate a
+    /// ### Why is this bad?
+    /// This makes code harder to read and might indicate a
     /// mistake.
     ///
-    /// **Known problems:** None.
-    ///
-    /// **Example:**
+    /// ### Example
     /// ```rust
     /// // Bad
     /// fn simple_double_parens() -> i32 {
@@ -32,6 +32,7 @@
     /// // Good
     /// foo(0);
     /// ```
+    #[clippy::version = "pre 1.29.0"]
     pub DOUBLE_PARENS,
     complexity,
     "Warn on unnecessary double parentheses"
@@ -50,7 +51,7 @@ fn check_expr(&mut self, cx: &EarlyContext<'_>, expr: &Expr) {
         match expr.kind {
             ExprKind::Paren(ref in_paren) => match in_paren.kind {
                 ExprKind::Paren(_) | ExprKind::Tup(_) => {
-                    span_lint(cx, DOUBLE_PARENS, expr.span, &msg);
+                    span_lint(cx, DOUBLE_PARENS, expr.span, msg);
                 },
                 _ => {},
             },
@@ -58,7 +59,7 @@ fn check_expr(&mut self, cx: &EarlyContext<'_>, expr: &Expr) {
                 if params.len() == 1 {
                     let param = &params[0];
                     if let ExprKind::Paren(_) = param.kind {
-                        span_lint(cx, DOUBLE_PARENS, param.span, &msg);
+                        span_lint(cx, DOUBLE_PARENS, param.span, msg);
                     }
                 }
             },
@@ -66,7 +67,7 @@ fn check_expr(&mut self, cx: &EarlyContext<'_>, expr: &Expr) {
                 if params.len() == 2 {
                     let param = &params[1];
                     if let ExprKind::Paren(_) = param.kind {
-                        span_lint(cx, DOUBLE_PARENS, param.span, &msg);
+                        span_lint(cx, DOUBLE_PARENS, param.span, msg);
                     }
                 }
             },