mirror of
https://github.com/rust-lang/rust-clippy
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29 lines
1.1 KiB
Rust
29 lines
1.1 KiB
Rust
// 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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#![feature(tool_lints)]
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use std::collections::{HashMap, HashSet, BTreeSet};
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#[warn(clippy::needless_collect)]
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#[allow(unused_variables, clippy::iter_cloned_collect)]
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fn main() {
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let sample = [1; 5];
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let len = sample.iter().collect::<Vec<_>>().len();
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if sample.iter().collect::<Vec<_>>().is_empty() {
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// Empty
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}
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sample.iter().cloned().collect::<Vec<_>>().contains(&1);
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sample.iter().map(|x| (x, x)).collect::<HashMap<_, _>>().len();
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// Notice the `HashSet`--this should not be linted
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sample.iter().collect::<HashSet<_>>().len();
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// Neither should this
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sample.iter().collect::<BTreeSet<_>>().len();
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}
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