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Update if-let-expressions.md (#237)

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Mention `let else` in the speaker notes.
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Igor Petruk 2023-01-23 18:05:06 +00:00 committed by GitHub
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src/control-flow/if-let-expressions.md
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@ -19,6 +19,7 @@ Rust.
<details>
* `if let` can be more concise than `match`, e.g., when only one case is interesting. In contrast, `match` requires all branches to be covered.
* For the similar use case consider demonstrating a newly stabilized [`let else`](https://github.com/rust-lang/rust/pull/93628) feature.
* A common usage is handling `Some` values when working with `Option`.
* Unlike `match`, `if let` does not support guard clauses for pattern matching.