Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 38 insertions, 0 deletions

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+% Match
+
+<small>There is a new edition of the book and this is an old link.</small>
+
+> `match` allows us to compare a value against a series of patterns and then execute code based on which pattern matches.
+> Patterns can be made up of literal values, variable names, wildcards, and many other things.
+
+```rust
+enum Coin {
+    Penny,
+    Nickel,
+    Dime,
+    Quarter,
+}
+
+fn value_in_cents(coin: Coin) -> u32 {
+    match coin {
+        Coin::Penny => 1,
+        Coin::Nickel => 5,
+        Coin::Dime => 10,
+        Coin::Quarter => 25,
+    }
+}
+```
+
+---
+
+Here are the relevant sections in the new and old books:
+
+* **[in the current edition: Ch 6.02 — The `match` Control Flow Operator][2]**
+* [in the current edition: Ch 18.00 — Patterns][3]
+* <small>[In the first edition: Ch 3.14 — Match][1]</small>
+
+
+[1]: https://doc.rust-lang.org/1.30.0/book/first-edition/match.html
+[2]: ch06-02-match.html
+[3]: ch18-00-patterns.html
+