update original

Author: funkill

rustbook-en/listings/ch19-patterns-and-matching/listing-19-01/src/main.rs

@@ -1,19 +1,5 @@
 fn main() {
-    let favorite_color: Option<&str> = None;
-    let is_tuesday = false;
-    let age: Result<u8, _> = "34".parse();
-
-    if let Some(color) = favorite_color {
-        println!("Using your favorite color, {color}, as the background");
-    } else if is_tuesday {
-        println!("Tuesday is green day!");
-    } else if let Ok(age) = age {
-        if age > 30 {
-            println!("Using purple as the background color");
-        } else {
-            println!("Using orange as the background color");
-        }
-    } else {
-        println!("Using blue as the background color");
-    }
+    // ANCHOR: here
+    let (x, y, z) = (1, 2, 3);
+    // ANCHOR_END: here
 }

rustbook-en/listings/ch19-patterns-and-matching/listing-19-02/output.txt

@@ -0,0 +1,15 @@
+$ cargo run
+   Compiling patterns v0.1.0 (file:///projects/patterns)
+error[E0308]: mismatched types
+ --> src/main.rs:2:9
+  |
+2 |     let (x, y) = (1, 2, 3);
+  |         ^^^^^^   --------- this expression has type `({integer}, {integer}, {integer})`
+  |         |
+  |         expected a tuple with 3 elements, found one with 2 elements
+  |
+  = note: expected tuple `({integer}, {integer}, {integer})`
+             found tuple `(_, _)`
+
+For more information about this error, try `rustc --explain E0308`.
+error: could not compile `patterns` (bin "patterns") due to 1 previous error

rustbook-en/listings/ch19-patterns-and-matching/listing-19-02/src/main.rs

@@ -1,14 +1,5 @@
 fn main() {
     // ANCHOR: here
-    let (tx, rx) = std::sync::mpsc::channel();
-    std::thread::spawn(move || {
-        for val in [1, 2, 3] {
-            tx.send(val).unwrap();
-        }
-    });
-
-    while let Ok(value) = rx.recv() {
-        println!("{value}");
-    }
+    let (x, y) = (1, 2, 3);
     // ANCHOR_END: here
 }

rustbook-en/listings/ch19-patterns-and-matching/listing-19-03/output.txt

@@ -1,9 +1,19 @@
 fn main() {
-    // ANCHOR: here
-    let v = vec!['a', 'b', 'c'];
+    let favorite_color: Option<&str> = None;
+    let is_tuesday = false;
+    let age: Result<u8, _> = "34".parse();
 
-    for (index, value) in v.iter().enumerate() {
-        println!("{value} is at index {index}");
+    if let Some(color) = favorite_color {
+        println!("Using your favorite color, {color}, as the background");
+    } else if is_tuesday {
+        println!("Tuesday is green day!");
+    } else if let Ok(age) = age {
+        if age > 30 {
+            println!("Using purple as the background color");
+        } else {
+            println!("Using orange as the background color");
+        }
+    } else {
+        println!("Using blue as the background color");
     }
-    // ANCHOR_END: here
 }

rustbook-en/listings/ch19-patterns-and-matching/listing-19-03/src/main.rs

@@ -1,5 +1,14 @@
 fn main() {
     // ANCHOR: here
-    let (x, y, z) = (1, 2, 3);
+    let (tx, rx) = std::sync::mpsc::channel();
+    std::thread::spawn(move || {
+        for val in [1, 2, 3] {
+            tx.send(val).unwrap();
+        }
+    });
+
+    while let Ok(value) = rx.recv() {
+        println!("{value}");
+    }
     // ANCHOR_END: here
 }

rustbook-en/listings/ch19-patterns-and-matching/listing-19-04/src/main.rs

@@ -1,15 +1,7 @@
 $ cargo run
    Compiling patterns v0.1.0 (file:///projects/patterns)
-error[E0308]: mismatched types
- --> src/main.rs:2:9
-  |
-2 |     let (x, y) = (1, 2, 3);
-  |         ^^^^^^   --------- this expression has type `({integer}, {integer}, {integer})`
-  |         |
-  |         expected a tuple with 3 elements, found one with 2 elements
-  |
-  = note: expected tuple `({integer}, {integer}, {integer})`
-             found tuple `(_, _)`
-
-For more information about this error, try `rustc --explain E0308`.
-error: could not compile `patterns` (bin "patterns") due to 1 previous error
+    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.52s
+     Running `target/debug/patterns`
+a is at index 0
+b is at index 1
+c is at index 2

rustbook-en/listings/ch19-patterns-and-matching/listing-19-05/output.txt

@@ -1,5 +1,9 @@
 fn main() {
     // ANCHOR: here
-    let (x, y) = (1, 2, 3);
+    let v = vec!['a', 'b', 'c'];
+
+    for (index, value) in v.iter().enumerate() {
+        println!("{value} is at index {index}");
+    }
     // ANCHOR_END: here
 }

rustbook-en/listings/ch19-patterns-and-matching/listing-19-05/src/main.rs

@@ -8,8 +8,8 @@ fn main() {
 
     match msg {
         Message::Hello {
-            id: id_variable @ 3..=7,
-        } => println!("Found an id in range: {id_variable}"),
+            id: id @ 3..=7,
+        } => println!("Found an id in range: {id}"),
         Message::Hello { id: 10..=12 } => {
             println!("Found an id in another range")
         }