mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-14 00:47:16 +00:00
45 lines
1.4 KiB
Rust
45 lines
1.4 KiB
Rust
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#![deny(clippy::iter_out_of_bounds)]
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fn opaque_empty_iter() -> impl Iterator<Item = ()> {
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std::iter::empty()
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}
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fn main() {
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for _ in [1, 2, 3].iter().skip(4) {
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//~^ ERROR: this `.skip()` call skips more items than the iterator will produce
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unreachable!();
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}
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for (i, _) in [1, 2, 3].iter().take(4).enumerate() {
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//~^ ERROR: this `.take()` call takes more items than the iterator will produce
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assert!(i <= 2);
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}
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#[allow(clippy::needless_borrow)]
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for _ in (&&&&&&[1, 2, 3]).iter().take(4) {}
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//~^ ERROR: this `.take()` call takes more items than the iterator will produce
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for _ in [1, 2, 3].iter().skip(4) {}
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//~^ ERROR: this `.skip()` call skips more items than the iterator will produce
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// Should not lint
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for _ in opaque_empty_iter().skip(1) {}
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// Should not lint
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let empty: [i8; 0] = [];
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for _ in empty.iter().skip(1) {}
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let empty = std::iter::empty::<i8>;
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for _ in empty().skip(1) {}
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//~^ ERROR: this `.skip()` call skips more items than the iterator will produce
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for _ in empty().take(1) {}
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//~^ ERROR: this `.take()` call takes more items than the iterator will produce
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for _ in std::iter::once(1).skip(2) {}
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//~^ ERROR: this `.skip()` call skips more items than the iterator will produce
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for _ in std::iter::once(1).take(2) {}
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//~^ ERROR: this `.take()` call takes more items than the iterator will produce
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}
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