23 lines
583 B
Rust
23 lines
583 B
Rust
#![warn(clippy::unnecessary_first_then_check)]
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#![allow(clippy::useless_vec, clippy::const_is_empty)]
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fn main() {
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let s = [1, 2, 3];
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let _: bool = s.first().is_some();
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let _: bool = s.first().is_none();
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let v = vec![1, 2, 3];
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let _: bool = v.first().is_some();
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let n = [[1, 2, 3], [4, 5, 6]];
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let _: bool = n[0].first().is_some();
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let _: bool = n[0].first().is_none();
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struct Foo {
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bar: &'static [i32],
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}
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let f = [Foo { bar: &[] }];
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let _: bool = f[0].bar.first().is_some();
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let _: bool = f[0].bar.first().is_none();
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}
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