-// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-use crate::rustc::hir::{Item, ItemKind};
-use crate::rustc::lint::{LateContext, LateLintPass, LintArray, LintPass};
-use crate::rustc::{declare_tool_lint, lint_array};
use crate::utils::{is_copy, match_path, paths, span_note_and_lint};
+use rustc::hir::{Item, ItemKind};
+use rustc::lint::{LateContext, LateLintPass, LintArray, LintPass};
+use rustc::{declare_lint_pass, declare_tool_lint};
-/// **What it does:** Checks for types that implement `Copy` as well as
-/// `Iterator`.
-///
-/// **Why is this bad?** Implicit copies can be confusing when working with
-/// iterator combinators.
-///
-/// **Known problems:** None.
-///
-/// **Example:**
-/// ```rust
-/// #[derive(Copy, Clone)]
-/// struct Countdown(u8);
-///
-/// impl Iterator for Countdown {
-/// // ...
-/// }
-///
-/// let a: Vec<_> = my_iterator.take(1).collect();
-/// let b: Vec<_> = my_iterator.collect();
-/// ```
declare_clippy_lint! {
+ /// **What it does:** Checks for types that implement `Copy` as well as
+ /// `Iterator`.
+ ///
+ /// **Why is this bad?** Implicit copies can be confusing when working with
+ /// iterator combinators.
+ ///
+ /// **Known problems:** None.
+ ///
+ /// **Example:**
+ /// ```rust,ignore
+ /// #[derive(Copy, Clone)]
+ /// struct Countdown(u8);
+ ///
+ /// impl Iterator for Countdown {
+ /// // ...
+ /// }
+ ///
+ /// let a: Vec<_> = my_iterator.take(1).collect();
+ /// let b: Vec<_> = my_iterator.collect();
+ /// ```
pub COPY_ITERATOR,
pedantic,
"implementing `Iterator` on a `Copy` type"
}
-pub struct CopyIterator;
-
-impl LintPass for CopyIterator {
- fn get_lints(&self) -> LintArray {
- lint_array![COPY_ITERATOR]
- }
-}
+declare_lint_pass!(CopyIterator => [COPY_ITERATOR]);
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for CopyIterator {
fn check_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx Item) {
- if let ItemKind::Impl(_, _, _, _, Some(ref trait_ref), _, _) = item.node {
- let ty = cx.tcx.type_of(cx.tcx.hir().local_def_id(item.id));
+ if let ItemKind::Impl(_, _, _, _, Some(ref trait_ref), _, _) = item.kind {
+ let ty = cx.tcx.type_of(cx.tcx.hir().local_def_id(item.hir_id));
if is_copy(cx, ty) && match_path(&trait_ref.path, &paths::ITERATOR) {
span_note_and_lint(