57 lines
1.4 KiB
Rust
57 lines
1.4 KiB
Rust
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// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![warn(clippy::for_kv_map)]
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#![allow(clippy::used_underscore_binding)]
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use std::collections::*;
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use std::rc::Rc;
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fn main() {
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let m: HashMap<u64, u64> = HashMap::new();
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for (_, v) in &m {
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let _v = v;
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}
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let m: Rc<HashMap<u64, u64>> = Rc::new(HashMap::new());
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for (_, v) in &*m {
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let _v = v;
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// Here the `*` is not actually necessary, but the test tests that we don't
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// suggest
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// `in *m.values()` as we used to
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}
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let mut m: HashMap<u64, u64> = HashMap::new();
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for (_, v) in &mut m {
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let _v = v;
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}
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let m: &mut HashMap<u64, u64> = &mut HashMap::new();
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for (_, v) in &mut *m {
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let _v = v;
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}
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let m: HashMap<u64, u64> = HashMap::new();
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let rm = &m;
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for (k, _value) in rm {
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let _k = k;
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}
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test_for_kv_map();
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}
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fn test_for_kv_map() {
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let m: HashMap<u64, u64> = HashMap::new();
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// No error, _value is actually used
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for (k, _value) in &m {
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let _ = _value;
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let _k = k;
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}
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}
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