X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=clippy_lints%2Fsrc%2Fidentity_op.rs;h=a4575c2c38fa2a37176b42f545351902bead4419;hb=e5a5b0a0774625eebbe7b29c67b49dc6431544d1;hp=31e955dc570c99a9b8522574ebbafb2ae8df31f8;hpb=712d2d4fa106e9713f9578e120439892efed289b;p=rust.git

diff --git a/clippy_lints/src/identity_op.rs b/clippy_lints/src/identity_op.rs
index 31e955dc570..a4575c2c38f 100644
--- a/clippy_lints/src/identity_op.rs
+++ b/clippy_lints/src/identity_op.rs
@@ -1,43 +1,39 @@
-use crate::consts::{constant_simple, Constant};
+use rustc::declare_lint_pass;
 use rustc::hir::*;
-use rustc::lint::*;
-use rustc::{declare_lint, lint_array};
-use syntax::source_map::Span;
-use crate::utils::{in_macro, snippet, span_lint, unsext, clip};
+use rustc::lint::{LateContext, LateLintPass, LintArray, LintPass};
 use rustc::ty;
+use rustc_session::declare_tool_lint;
+use syntax::source_map::Span;
+
+use crate::consts::{constant_simple, Constant};
+use crate::utils::{clip, snippet, span_lint, unsext};
 
-/// **What it does:** Checks for identity operations, e.g. `x + 0`.
-///
-/// **Why is this bad?** This code can be removed without changing the
-/// meaning. So it just obscures what's going on. Delete it mercilessly.
-///
-/// **Known problems:** None.
-///
-/// **Example:**
-/// ```rust
-/// x / 1 + 0 * 1 - 0 | 0
-/// ```
 declare_clippy_lint! {
+    /// **What it does:** Checks for identity operations, e.g., `x + 0`.
+    ///
+    /// **Why is this bad?** This code can be removed without changing the
+    /// meaning. So it just obscures what's going on. Delete it mercilessly.
+    ///
+    /// **Known problems:** None.
+    ///
+    /// **Example:**
+    /// ```rust
+    /// # let x = 1;
+    /// x / 1 + 0 * 1 - 0 | 0;
+    /// ```
     pub IDENTITY_OP,
     complexity,
-    "using identity operations, e.g. `x + 0` or `y / 1`"
+    "using identity operations, e.g., `x + 0` or `y / 1`"
 }
 
-#[derive(Copy, Clone)]
-pub struct IdentityOp;
-
-impl LintPass for IdentityOp {
-    fn get_lints(&self) -> LintArray {
-        lint_array!(IDENTITY_OP)
-    }
-}
+declare_lint_pass!(IdentityOp => [IDENTITY_OP]);
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for IdentityOp {
     fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, e: &'tcx Expr) {
-        if in_macro(e.span) {
+        if e.span.from_expansion() {
             return;
         }
-        if let ExprKind::Binary(ref cmp, ref left, ref right) = e.node {
+        if let ExprKind::Binary(ref cmp, ref left, ref right) = e.kind {
             match cmp.node {
                 BinOpKind::Add | BinOpKind::BitOr | BinOpKind::BitXor => {
                     check(cx, left, 0, e.span, right.span);
@@ -59,10 +55,10 @@ fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, e: &'tcx Expr) {
     }
 }
 
-#[allow(cast_possible_wrap)]
+#[allow(clippy::cast_possible_wrap)]
 fn check(cx: &LateContext<'_, '_>, e: &Expr, m: i8, span: Span, arg: Span) {
     if let Some(Constant::Int(v)) = constant_simple(cx, cx.tables, e) {
-        let check = match cx.tables.expr_ty(e).sty {
+        let check = match cx.tables.expr_ty(e).kind {
             ty::Int(ity) => unsext(cx.tcx, -1_i128, ity),
             ty::Uint(uty) => clip(cx.tcx, !0, uty),
             _ => return,