mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-12-11 22:02:55 +00:00
80 lines
1.9 KiB
Rust
80 lines
1.9 KiB
Rust
#![warn(clippy::self_assignment)]
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#![allow(clippy::useless_vec, clippy::needless_pass_by_ref_mut)]
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pub struct S<'a> {
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a: i32,
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b: [i32; 10],
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c: Vec<Vec<i32>>,
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e: &'a mut i32,
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f: &'a mut i32,
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}
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pub fn positives(mut a: usize, b: &mut u32, mut s: S) {
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a = a;
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//~^ ERROR: self-assignment of `a` to `a`
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//~| NOTE: `-D clippy::self-assignment` implied by `-D warnings`
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*b = *b;
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//~^ ERROR: self-assignment of `*b` to `*b`
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s = s;
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//~^ ERROR: self-assignment of `s` to `s`
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s.a = s.a;
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//~^ ERROR: self-assignment of `s.a` to `s.a`
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s.b[9] = s.b[5 + 4];
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//~^ ERROR: self-assignment of `s.b[5 + 4]` to `s.b[9]`
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s.c[0][1] = s.c[0][1];
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//~^ ERROR: self-assignment of `s.c[0][1]` to `s.c[0][1]`
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s.b[a] = s.b[a];
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//~^ ERROR: self-assignment of `s.b[a]` to `s.b[a]`
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*s.e = *s.e;
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//~^ ERROR: self-assignment of `*s.e` to `*s.e`
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s.b[a + 10] = s.b[10 + a];
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//~^ ERROR: self-assignment of `s.b[10 + a]` to `s.b[a + 10]`
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let mut t = (0, 1);
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t.1 = t.1;
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//~^ ERROR: self-assignment of `t.1` to `t.1`
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t.0 = (t.0);
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//~^ ERROR: self-assignment of `(t.0)` to `t.0`
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}
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pub fn negatives_not_equal(mut a: usize, b: &mut usize, mut s: S) {
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dbg!(&a);
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a = *b;
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dbg!(&a);
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s.b[1] += s.b[1];
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s.b[1] = s.b[2];
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s.c[1][0] = s.c[0][1];
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s.b[a] = s.b[*b];
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s.b[a + 10] = s.b[a + 11];
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*s.e = *s.f;
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let mut t = (0, 1);
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t.0 = t.1;
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}
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#[allow(clippy::mixed_read_write_in_expression)]
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pub fn negatives_side_effects() {
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let mut v = vec![1, 2, 3, 4, 5];
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let mut i = 0;
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v[{
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i += 1;
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i
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}] = v[{
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i += 1;
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i
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}];
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fn next(n: &mut usize) -> usize {
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let v = *n;
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*n += 1;
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v
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}
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let mut w = vec![1, 2, 3, 4, 5];
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let mut i = 0;
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let i = &mut i;
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w[next(i)] = w[next(i)];
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w[next(i)] = w[next(i)];
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}
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fn main() {}
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