61 lines
1.2 KiB
Rust
61 lines
1.2 KiB
Rust
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#![warn(clippy::zero_repeat_side_effects)]
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#![allow(clippy::unnecessary_operation)]
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#![allow(clippy::useless_vec)]
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#![allow(clippy::needless_late_init)]
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fn f() -> i32 {
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println!("side effect");
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10
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}
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fn main() {
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const N: usize = 0;
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const M: usize = 1;
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// should trigger
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// on arrays
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f(); let a: [i32; 0] = [];
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f(); let a: [i32; 0] = [];
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let mut b;
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f(); b = [] as [i32; 0];
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f(); b = [] as [i32; 0];
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// on vecs
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// vecs dont support infering value of consts
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f(); let c: std::vec::Vec<i32> = vec![];
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let d;
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f(); d = vec![] as std::vec::Vec<i32>;
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// for macros
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println!("side effect"); let e: [(); 0] = [];
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// for nested calls
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{ f() }; let g: [i32; 0] = [];
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// as function param
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drop({ f(); vec![] as std::vec::Vec<i32> });
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// when singled out/not part of assignment/local
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{ f(); vec![] as std::vec::Vec<i32> };
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{ f(); [] as [i32; 0] };
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{ f(); [] as [i32; 0] };
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// should not trigger
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// on arrays with > 0 repeat
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let a = [f(); 1];
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let a = [f(); M];
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let mut b;
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b = [f(); 1];
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b = [f(); M];
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// on vecs with > 0 repeat
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let c = vec![f(); 1];
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let d;
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d = vec![f(); 1];
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// as function param
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drop(vec![f(); 1]);
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}
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