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Avoid incorrect attribution to the borrow-checker

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LukeMathWalker
2025-07-07 16:05:34 +02:00
parent 41ad768fd6
commit bbd0631fe4
1 changed files with 3 additions and 2 deletions
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src/idiomatic/leveraging-the-type-system/newtype-pattern/parse-don-t-validate.md
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@ -44,8 +44,9 @@ impl Username {
ensuring that all instances of `Username` satisfy those checks. ensuring that all instances of `Username` satisfy those checks.
- The `as_str` method allows consumers to access the raw string representation - The `as_str` method allows consumers to access the raw string representation
(e.g., to store it in a database) but, thanks to Rust's borrow checker, they (e.g., to store it in a database). However, consumers can't modify the
can't modify it. underlying value since `&str`, the returned type, restricts them to read-only
access.
- Stress the importance of evaluating _the entire API surface_ exposed by a - Stress the importance of evaluating _the entire API surface_ exposed by a
newtype to determine if invariants are indeed bullet-proof. newtype to determine if invariants are indeed bullet-proof.