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Auto merge of #12413 - high-cloud:fix_assign_ops2, r=flip1995

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[`misrefactored_assign_op`]: Fix duplicate diagnostics

Relate to #12379

The following diagnostics appear twice
```
  --> tests/ui/assign_ops2.rs:26:5
   |
LL |     a *= a * a;
   |     ^^^^^^^^^^
   |
help: did you mean `a = a * a` or `a = a * a * a`? Consider replacing it with
```

because `a` (lhs) appears in both left operand and right operand in the right hand side.
This PR fixes the issue so that if a diagnostic is created for an operand, the check of the other operand will be skipped. It's fine because the result is always the same in the affected operators.

changelog: [`misrefactored_assign_op`]: Fix duplicate diagnostics
This commit is contained in:
bors 2024-03-05 14:34:56 +00:00
commit 2d9d404448
3 changed files with 12 additions and 15 deletions
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5
clippy_lints/src/operators/misrefactored_assign_op.rs
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@ -21,9 +21,8 @@ pub(super) fn check<'tcx>(
// lhs op= l op r
if eq_expr_value(cx, lhs, l) {
lint_misrefactored_assign_op(cx, expr, op, rhs, lhs, r);
}
// lhs op= l commutative_op r
if is_commutative(op) && eq_expr_value(cx, lhs, r) {
} else if is_commutative(op) && eq_expr_value(cx, lhs, r) {
// lhs op= l commutative_op r
lint_misrefactored_assign_op(cx, expr, op, rhs, lhs, l);
}
}