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docs/book/src/contributing/style.md
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@ -236,22 +236,6 @@ In the "Good" version, the precondition check and usage are checked in the same
**Rationale:** non-local code properties degrade under change.
When checking a boolean precondition, prefer `if !invariant` to `if negated_invariant`:
```rust
// GOOD
if !(idx < len) {
return None;
}
// BAD
if idx >= len {
return None;
}
```
**Rationale:** it's useful to see the invariant relied upon by the rest of the function clearly spelled out.
## Control Flow
As a special case of the previous rule, do not hide control flow inside functions, push it to the caller: