rust/tests/ui/bytecount.rs

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#[deny(clippy::naive_bytecount)]
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fn main() {
let x = vec![0_u8; 16];
let _ = x.iter().filter(|&&a| a == 0).count(); // naive byte count
let _ = (&x[..]).iter().filter(|&a| *a == 0).count(); // naive byte count
let _ = x.iter().filter(|a| **a > 0).count(); // not an equality count, OK.
let _ = x.iter().map(|a| a + 1).filter(|&a| a < 15).count(); // not a slice
let b = 0;
let _ = x.iter().filter(|_| b > 0).count(); // woah there
let _ = x.iter().filter(|_a| b == b + 1).count(); // nothing to see here, move along
let _ = x.iter().filter(|a| b + 1 == **a).count(); // naive byte count
let y = vec![0_u16; 3];
let _ = y.iter().filter(|&&a| a == 0).count(); // naive count, but not bytes
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}