Use inline format argument syntax

exercises/clippy/clippy2.rs

@@ -9,5 +9,5 @@ fn main() {
     for x in option {
         res += x;
     }
-    println!("{}", res);
+    println!("{res}");
 }

exercises/clippy/clippy3.rs

@@ -14,15 +14,15 @@ fn main() {
         -1, -2, -3
         -4, -5, -6
     ];
-    println!("My array! Here it is: {:?}", my_arr);
+    println!("My array! Here it is: {my_arr:?}");
 
     let my_empty_vec = vec![1, 2, 3, 4, 5].resize(0, 5);
-    println!("This Vec is empty, see? {:?}", my_empty_vec);
+    println!("This Vec is empty, see? {my_empty_vec:?}");
 
     let mut value_a = 45;
     let mut value_b = 66;
     // Let's swap these two!
     value_a = value_b;
     value_b = value_a;
-    println!("value a: {}; value b: {}", value_a, value_b);
+    println!("value a: {value_a}; value b: {value_b}");
 }

exercises/conversions/from_str.rs

@@ -51,7 +51,7 @@ impl FromStr for Person {
 
 fn main() {
     let p = "Mark,20".parse::<Person>().unwrap();
-    println!("{:?}", p);
+    println!("{p:?}");
 }
 
 #[cfg(test)]

exercises/enums/enums3.rs

@@ -29,7 +29,7 @@ impl State {
     }
 
     fn echo(&self, s: String) {
-        println!("{}", s);
+        println!("{s}");
     }
 
     fn move_position(&mut self, p: Point) {

exercises/error_handling/errors1.rs

@@ -12,7 +12,7 @@ pub fn generate_nametag_text(name: String) -> Option<String> {
         // Empty names aren't allowed.
         None
     } else {
-        Some(format!("Hi! My name is {}", name))
+        Some(format!("Hi! My name is {name}"))
     }
 }
 

exercises/error_handling/errors3.rs

@@ -18,7 +18,7 @@ fn main() {
         println!("You can't afford that many!");
     } else {
         tokens -= cost;
-        println!("You now have {} tokens.", tokens);
+        println!("You now have {tokens} tokens.");
     }
 }
 

exercises/functions/functions5.rs

@@ -5,7 +5,7 @@
 
 fn main() {
     let answer = square(3);
-    println!("The square of 3 is {}", answer);
+    println!("The square of 3 is {answer}");
 }
 
 fn square(num: i32) -> i32 {

exercises/lifetimes/lifetimes1.rs

@@ -22,5 +22,5 @@ fn main() {
     let string2 = "xyz";
 
     let result = longest(string1.as_str(), string2);
-    println!("The longest string is '{}'", result);
+    println!("The longest string is '{result}'");
 }

exercises/lifetimes/lifetimes2.rs

@@ -23,5 +23,5 @@ fn main() {
         let string2 = String::from("xyz");
         result = longest(string1.as_str(), string2.as_str());
     }
-    println!("The longest string is '{}'", result);
+    println!("The longest string is '{result}'");
 }

exercises/move_semantics/move_semantics1.rs

@@ -8,11 +8,11 @@ fn main() {
 
     let vec1 = fill_vec(vec0);
 
-    println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
+    println!("{} has length {} content `{vec1:?}`", "vec1", vec1.len());
 
     vec1.push(88);
 
-    println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
+    println!("{} has length {} content `{vec1:?}`", "vec1", vec1.len());
 }
 
 fn fill_vec(vec: Vec<i32>) -> Vec<i32> {

exercises/move_semantics/move_semantics2.rs

@@ -10,11 +10,11 @@ fn main() {
     let mut vec1 = fill_vec(vec0);
 
     // Do not change the following line!
-    println!("{} has length {} content `{:?}`", "vec0", vec0.len(), vec0);
+    println!("{} has length {} content `{vec0:?}`", "vec0", vec0.len());
 
     vec1.push(88);
 
-    println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
+    println!("{} has length {} content `{vec1:?}`", "vec1", vec1.len());
 }
 
 fn fill_vec(vec: Vec<i32>) -> Vec<i32> {

exercises/move_semantics/move_semantics3.rs

@@ -10,11 +10,11 @@ fn main() {
 
     let mut vec1 = fill_vec(vec0);
 
-    println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
+    println!("{} has length {} content `{vec1:?}`", "vec1", vec1.len());
 
     vec1.push(88);
 
-    println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
+    println!("{} has length {} content `{vec1:?}`", "vec1", vec1.len());
 }
 
 fn fill_vec(vec: Vec<i32>) -> Vec<i32> {

exercises/move_semantics/move_semantics4.rs

@@ -11,11 +11,11 @@ fn main() {
 
     let mut vec1 = fill_vec(vec0);
 
-    println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
+    println!("{} has length {} content `{vec1:?}`", "vec1", vec1.len());
 
     vec1.push(88);
 
-    println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
+    println!("{} has length {} content `{vec1:?}`", "vec1", vec1.len());
 }
 
 // `fill_vec()` no longer takes `vec: Vec<i32>` as argument

exercises/move_semantics/move_semantics6.rs

@@ -21,5 +21,5 @@ fn get_char(data: String) -> char {
 fn string_uppercase(mut data: &String) {
     data = &data.to_uppercase();
 
-    println!("{}", data);
+    println!("{data}");
 }

exercises/primitive_types/primitive_types5.rs

@@ -8,5 +8,5 @@ fn main() {
     let cat = ("Furry McFurson", 3.5);
     let /* your pattern here */ = cat;
 
-    println!("{} is {} years old.", name, age);
+    println!("{name} is {age} years old.");
 }

exercises/smart_pointers/arc1.rs

@@ -33,7 +33,7 @@ fn main() {
         let child_numbers = // TODO
         joinhandles.push(thread::spawn(move || {
             let sum: u32 = child_numbers.iter().filter(|n| *n % 8 == offset).sum();
-            println!("Sum of offset {} is {}", offset, sum);
+            println!("Sum of offset {offset} is {sum}");
         }));
     }
     for handle in joinhandles.into_iter() {

exercises/smart_pointers/rc1.rs

@@ -26,7 +26,7 @@ enum Planet {
 
 impl Planet {
     fn details(&self) {
-        println!("Hi from {:?}!", self)
+        println!("Hi from {self:?}!")
     }
 }
 

exercises/strings/strings1.rs

@@ -6,7 +6,7 @@
 
 fn main() {
     let answer = current_favorite_color();
-    println!("My current favorite color is {}", answer);
+    println!("My current favorite color is {answer}");
 }
 
 fn current_favorite_color() -> String {

exercises/strings/strings4.rs

@@ -9,10 +9,10 @@
 // I AM NOT DONE
 
 fn string_slice(arg: &str) {
-    println!("{}", arg);
+    println!("{arg}");
 }
 fn string(arg: String) {
-    println!("{}", arg);
+    println!("{arg}");
 }
 
 fn main() {

exercises/structs/structs1.rs

@@ -41,7 +41,7 @@ mod tests {
     fn unit_structs() {
         // TODO: Instantiate a unit-like struct!
         // let unit_like_struct =
-        let message = format!("{:?}s are fun!", unit_like_struct);
+        let message = format!("{unit_like_struct:?}s are fun!");
 
         assert_eq!(message, "UnitLikeStructs are fun!");
     }

exercises/threads/threads1.rs

@@ -14,7 +14,7 @@ fn main() {
     for i in 0..10 {
         thread::spawn(move || {
             thread::sleep(Duration::from_millis(250));
-            println!("thread {} is complete", i);
+            println!("thread {i} is complete");
         });
     }
 

exercises/threads/threads3.rs

@@ -31,7 +31,7 @@ fn send_tx(q: Queue, tx: mpsc::Sender<u32>) -> () {
 
     thread::spawn(move || {
         for val in &qc1.first_half {
-            println!("sending {:?}", val);
+            println!("sending {val:?}");
             tx.send(*val).unwrap();
             thread::sleep(Duration::from_secs(1));
         }
@@ -39,7 +39,7 @@ fn send_tx(q: Queue, tx: mpsc::Sender<u32>) -> () {
 
     thread::spawn(move || {
         for val in &qc2.second_half {
-            println!("sending {:?}", val);
+            println!("sending {val:?}");
             tx.send(*val).unwrap();
             thread::sleep(Duration::from_secs(1));
         }
@@ -55,10 +55,10 @@ fn main() {
 
     let mut total_received: u32 = 0;
     for received in rx {
-        println!("Got: {}", received);
+        println!("Got: {received}");
         total_received += 1;
     }
 
-    println!("total numbers received: {}", total_received);
+    println!("total numbers received: {total_received:?}");
     assert_eq!(total_received, queue_length)
 }

exercises/traits/traits1.rs

@@ -22,7 +22,7 @@ impl AppendBar for String {
 fn main() {
     let s = String::from("Foo");
     let s = s.append_bar();
-    println!("s: {}", s);
+    println!("s: {s}");
 }
 
 #[cfg(test)]

exercises/variables/variables1.rs

@@ -6,5 +6,5 @@
 
 fn main() {
     x = 5;
-    println!("x has the value {}", x);
+    println!("x has the value {x}");
 }

exercises/variables/variables3.rs

@@ -5,5 +5,5 @@
 
 fn main() {
     let x: i32;
-    println!("Number {}", x);
+    println!("Number {x}");
 }

exercises/variables/variables4.rs

@@ -5,7 +5,7 @@
 
 fn main() {
     let x = 3;
-    println!("Number {}", x);
+    println!("Number {x}");
     x = 5; // don't change this line
-    println!("Number {}", x);
+    println!("Number {x}");
 }

exercises/variables/variables5.rs

@@ -5,7 +5,7 @@
 
 fn main() {
     let number = "T-H-R-E-E"; // don't change this line
-    println!("Spell a Number : {}", number);
+    println!("Spell a Number : {number}");
     number = 3; // don't rename this variable
     println!("Number plus two is : {}", number + 2);
 }

exercises/variables/variables6.rs

@@ -5,5 +5,5 @@
 
 const NUMBER = 3;
 fn main() {
-    println!("Number {}", NUMBER);
+    println!("Number {NUMBER}");
 }