Fix warnings

exercises/06_move_semantics/move_semantics5.rs

@@ -1,3 +1,5 @@
+#![allow(clippy::ptr_arg)]
+
 // TODO: Fix the compiler errors without changing anything except adding or
 // removing references (the character `&`).
 

exercises/08_enums/enums2.rs

@@ -1,3 +1,4 @@
+#[allow(dead_code)]
 #[derive(Debug)]
 enum Message {
     // TODO: Define the different variants used below.
@@ -5,7 +6,7 @@ enum Message {
 
 impl Message {
     fn call(&self) {
-        println!("{:?}", self);
+        println!("{self:?}");
     }
 }
 

exercises/10_modules/modules2.rs

@@ -1,6 +1,7 @@
 // You can bring module paths into scopes and provide new names for them with
 // the `use` and `as` keywords.
 
+#[allow(dead_code)]
 mod delicious_snacks {
     // TODO: Add the following two `use` statements after fixing them.
     // use self::fruits::PEAR as ???;

exercises/13_error_handling/errors4.rs

@@ -1,3 +1,5 @@
+#![allow(clippy::comparison_chain)]
+
 #[derive(PartialEq, Debug)]
 enum CreationError {
     Negative,

exercises/13_error_handling/errors6.rs

@@ -35,7 +35,7 @@ impl PositiveNonzeroInteger {
     fn new(value: i64) -> Result<Self, CreationError> {
         match value {
             x if x < 0 => Err(CreationError::Negative),
-            x if x == 0 => Err(CreationError::Zero),
+            0 => Err(CreationError::Zero),
             x => Ok(Self(x as u64)),
         }
     }
@@ -55,7 +55,6 @@ fn main() {
 #[cfg(test)]
 mod test {
     use super::*;
-    use std::num::IntErrorKind;
 
     #[test]
     fn test_parse_error() {

exercises/15_traits/traits3.rs

@@ -1,3 +1,5 @@
+#![allow(dead_code)]
+
 trait Licensed {
     // TODO: Add a default implementation for `licensing_info` so that
     // implementors like the two structs below can share that default behavior

exercises/19_smart_pointers/rc1.rs

@@ -8,6 +8,7 @@ use std::rc::Rc;
 #[derive(Debug)]
 struct Sun;
 
+#[allow(dead_code)]
 #[derive(Debug)]
 enum Planet {
     Mercury(Rc<Sun>),

solutions/01_variables/variables3.rs

@@ -1,3 +1,5 @@
+#![allow(clippy::needless_late_init)]
+
 fn main() {
     // Reading uninitialized variables isn't allowed in Rust!
     // Therefore, we need to assign a value first.

solutions/06_move_semantics/move_semantics5.rs

@@ -1,3 +1,5 @@
+#![allow(clippy::ptr_arg)]
+
 fn main() {
     let data = "Rust is great!".to_string();
 

solutions/08_enums/enums2.rs

@@ -1,3 +1,4 @@
+#[allow(dead_code)]
 #[derive(Debug)]
 enum Message {
     Move { x: i64, y: i64 },
@@ -8,7 +9,7 @@ enum Message {
 
 impl Message {
     fn call(&self) {
-        println!("{:?}", self);
+        println!("{self:?}");
     }
 }
 

solutions/10_modules/modules2.rs

@@ -1,3 +1,4 @@
+#[allow(dead_code)]
 mod delicious_snacks {
     // Added `pub` and used the expected alias after `as`.
     pub use self::fruits::PEAR as fruit;

solutions/11_hashmaps/hashmaps3.rs

@@ -28,13 +28,13 @@ fn build_scores_table(results: &str) -> HashMap<&str, Team> {
         let team_2_score: u8 = split_iterator.next().unwrap().parse().unwrap();
 
         // Insert the default with zeros if a team doesn't exist yet.
-        let mut team_1 = scores.entry(team_1_name).or_insert_with(|| Team::default());
+        let team_1 = scores.entry(team_1_name).or_insert_with(Team::default);
         // Update the values.
         team_1.goals_scored += team_1_score;
         team_1.goals_conceded += team_2_score;
 
         // Similarely for the second team.
-        let mut team_2 = scores.entry(team_2_name).or_insert_with(|| Team::default());
+        let team_2 = scores.entry(team_2_name).or_insert_with(Team::default);
         team_2.goals_scored += team_2_score;
         team_2.goals_conceded += team_1_score;
     }

solutions/13_error_handling/errors2.rs

@@ -16,6 +16,7 @@
 
 use std::num::ParseIntError;
 
+#[allow(unused_variables)]
 fn total_cost(item_quantity: &str) -> Result<i32, ParseIntError> {
     let processing_fee = 1;
     let cost_per_item = 5;

solutions/13_error_handling/errors4.rs

@@ -1,3 +1,5 @@
+#![allow(clippy::comparison_chain)]
+
 #[derive(PartialEq, Debug)]
 enum CreationError {
     Negative,

solutions/13_error_handling/errors6.rs

@@ -36,7 +36,7 @@ impl PositiveNonzeroInteger {
     fn new(value: i64) -> Result<Self, CreationError> {
         match value {
             x if x < 0 => Err(CreationError::Negative),
-            x if x == 0 => Err(CreationError::Zero),
+            0 => Err(CreationError::Zero),
             x => Ok(Self(x as u64)),
         }
     }
@@ -57,7 +57,6 @@ fn main() {
 #[cfg(test)]
 mod test {
     use super::*;
-    use std::num::IntErrorKind;
 
     #[test]
     fn test_parse_error() {

solutions/15_traits/traits3.rs

@@ -1,3 +1,5 @@
+#![allow(dead_code)]
+
 trait Licensed {
     fn licensing_info(&self) -> String {
         "Default license".to_string()

solutions/19_smart_pointers/rc1.rs

@@ -8,6 +8,7 @@ use std::rc::Rc;
 #[derive(Debug)]
 struct Sun;
 
+#[allow(dead_code)]
 #[derive(Debug)]
 enum Planet {
     Mercury(Rc<Sun>),

solutions/23_conversions/try_from_into.rs

@@ -4,6 +4,7 @@
 // type itself. You can read more about it in the documentation:
 // https://doc.rust-lang.org/std/convert/trait.TryFrom.html
 
+#![allow(clippy::useless_vec)]
 use std::convert::{TryFrom, TryInto};
 
 #[derive(Debug, PartialEq)]