ch06 Enumとパターンマッチングの和訳を最新版に更新

rust-lang/book@19c40bf

listings/ch06-enums-and-pattern-matching/listing-06-01/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/listing-06-02/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/listing-06-03/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/listing-06-04/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/listing-06-04/src/main.rs

@@ -1,9 +1,9 @@
 // ANCHOR: here
-#[derive(Debug)] // so we can inspect the state in a minute
+#[derive(Debug)] // すぐに州を検査できるように
 enum UsState {
     Alabama,
     Alaska,
-    // --snip--
+    // --略--
 }
 
 enum Coin {

listings/ch06-enums-and-pattern-matching/listing-06-05/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/listing-06-06/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/listing-06-06/src/main.rs

@@ -1,8 +1,8 @@
 fn main() {
     // ANCHOR: here
-    let some_u8_value = Some(0u8);
-    match some_u8_value {
-        Some(3) => println!("three"),
+    let config_max = Some(3u8);
+    match config_max {
+        Some(max) => println!("The maximum is configured to be {}", max),
         _ => (),
     }
     // ANCHOR_END: here

listings/ch06-enums-and-pattern-matching/no-listing-01-defining-enums/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/no-listing-02-enum-with-data/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/no-listing-03-variants-with-different-data/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/no-listing-04-structs-similar-to-message-enum/src/main.rs

@@ -1,11 +1,11 @@
 // ANCHOR: here
-struct QuitMessage; // unit struct
+struct QuitMessage; // ユニット構造体
 struct MoveMessage {
     x: i32,
     y: i32,
 }
-struct WriteMessage(String); // tuple struct
-struct ChangeColorMessage(i32, i32, i32); // tuple struct
+struct WriteMessage(String); // タプル構造体
+struct ChangeColorMessage(i32, i32, i32); // タプル構造体
                                           // ANCHOR_END: here
 
 fn main() {}

listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/no-listing-05-methods-on-enums/src/main.rs

@@ -9,7 +9,7 @@ fn main() {
     // ANCHOR: here
     impl Message {
         fn call(&self) {
-            // method body would be defined here
+            // メソッド本体はここで定義されます
         }
     }
 

listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/no-listing-06-option-examples/src/main.rs

@@ -1,7 +1,7 @@
 fn main() {
     // ANCHOR: here
     let some_number = Some(5);
-    let some_string = Some("a string");
+    let some_char = Some('e');
 
     let absent_number: Option<i32> = None;
     // ANCHOR_END: here

listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/output.txt

@@ -1,16 +1,21 @@
 $ cargo run
    Compiling enums v0.1.0 (file:///projects/enums)
-error[E0277]: cannot add `std::option::Option<i8>` to `i8`
+error[E0277]: cannot add `Option<i8>` to `i8`
+(エラー: `Option<i8>`を`i8`に足すことはできません)
  --> src/main.rs:5:17
   |
 5 |     let sum = x + y;
-  |                 ^ no implementation for `i8 + std::option::Option<i8>`
+  |                 ^ no implementation for `i8 + Option<i8>`
+                      (`i8 + `Option<i8>`のための実装がありません)
   |
-  = help: the trait `std::ops::Add<std::option::Option<i8>>` is not implemented for `i8`
-
-error: aborting due to previous error
+  = help: the trait `Add<Option<i8>>` is not implemented for `i8`
+    (ヘルプ: トレイト`Add<Option<i8>`が`i8`に対して実装されていません)
+  = help: the following other types implement trait `Add<Rhs>`:
+    (ヘルプ: 以下の型であればトレイト`Add<Rhs>`を実装しています:)
+            <i8 as Add>
+            <i8 as Add<&i8>>
+            <&'a i8 as Add<i8>>
+            <&i8 as Add<&i8>>
 
 For more information about this error, try `rustc --explain E0277`.
-error: could not compile `enums`.
-
-To learn more, run the command again with --verbose.
+error: could not compile `enums` (bin "enums") due to 1 previous error

listings/ch06-enums-and-pattern-matching/no-listing-08-match-arm-multiple-lines/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/no-listing-09-variable-in-pattern/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/output.txt

@@ -1,16 +1,25 @@
 $ cargo run
    Compiling enums v0.1.0 (file:///projects/enums)
 error[E0004]: non-exhaustive patterns: `None` not covered
+(エラー: 包括的でないパターン: `None`が網羅されていません)
  --> src/main.rs:3:15
   |
 3 |         match x {
   |               ^ pattern `None` not covered
+                    (パターン`None`が網羅されていません)
+  |
+note: `Option<i32>` defined here
+ --> /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/option.rs:570:1
+ ::: /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/option.rs:574:5
+  |
+  = note: not covered
+  = note: the matched value is of type `Option<i32>`
+help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown
+(ヘルプ: ワイルドカードパターンか、以下に示すように明示的なパターンを持つアームを追加することで、すべての可能な場合が確実に処理されるようにしてください)
+  |
+4 ~             Some(i) => Some(i + 1),
+5 ~             None => todo!(),
   |
-  = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
-
-error: aborting due to previous error
 
 For more information about this error, try `rustc --explain E0004`.
-error: could not compile `enums`.
-
-To learn more, run the command again with --verbose.
+error: could not compile `enums` (bin "enums") due to 1 previous error

listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/no-listing-12-if-let/src/main.rs

@@ -1,8 +1,8 @@
 fn main() {
-    let some_u8_value = Some(0u8);
     // ANCHOR: here
-    if let Some(3) = some_u8_value {
-        println!("three");
+    let config_max = Some(3u8);
+    if let Some(max) = config_max {
+        println!("The maximum is configured to be {}", max);
     }
     // ANCHOR_END: here
 }

listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/no-listing-13-count-and-announce-match/src/main.rs

@@ -2,7 +2,7 @@
 enum UsState {
     Alabama,
     Alaska,
-    // --snip--
+    // --略--
 }
 
 enum Coin {

listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/no-listing-14-count-and-announce-if-let-else/src/main.rs

@@ -2,7 +2,7 @@
 enum UsState {
     Alabama,
     Alaska,
-    // --snip--
+    // --略--
 }
 
 enum Coin {

listings/ch06-enums-and-pattern-matching/no-listing-11-underscore-placeholder/Cargo.toml → listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/Cargo.toml

@@ -1,7 +1,6 @@
 [package]
 name = "enums"
 version = "0.1.0"
-authors = ["Your Name <[email protected]>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]

listings/ch06-enums-and-pattern-matching/no-listing-15-binding-catchall/src/main.rs

@@ -0,0 +1,14 @@
+fn main() {
+    // ANCHOR: here
+    let dice_roll = 9;
+    match dice_roll {
+        3 => add_fancy_hat(),
+        7 => remove_fancy_hat(),
+        other => move_player(other),
+    }
+
+    fn add_fancy_hat() {}
+    fn remove_fancy_hat() {}
+    fn move_player(num_spaces: u8) {}
+    // ANCHOR_END: here
+}

listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

listings/ch06-enums-and-pattern-matching/no-listing-16-underscore-catchall/src/main.rs

@@ -0,0 +1,14 @@
+fn main() {
+    // ANCHOR: here
+    let dice_roll = 9;
+    match dice_roll {
+        3 => add_fancy_hat(),
+        7 => remove_fancy_hat(),
+        _ => reroll(),
+    }
+
+    fn add_fancy_hat() {}
+    fn remove_fancy_hat() {}
+    fn reroll() {}
+    // ANCHOR_END: here
+}

listings/ch06-enums-and-pattern-matching/no-listing-17-underscore-unit/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "enums"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]