Merge pull request #1637 from mo8it/fix-warnings

Run clippy --fix

src/exercise.rs

@@ -110,12 +110,12 @@ impl Exercise {
     pub fn compile(&self) -> Result<CompiledExercise, ExerciseOutput> {
         let cmd = match self.mode {
             Mode::Compile => Command::new("rustc")
-                .args(&[self.path.to_str().unwrap(), "-o", &temp_file()])
+                .args([self.path.to_str().unwrap(), "-o", &temp_file()])
                 .args(RUSTC_COLOR_ARGS)
                 .args(RUSTC_EDITION_ARGS)
                 .output(),
             Mode::Test => Command::new("rustc")
-                .args(&["--test", self.path.to_str().unwrap(), "-o", &temp_file()])
+                .args(["--test", self.path.to_str().unwrap(), "-o", &temp_file()])
                 .args(RUSTC_COLOR_ARGS)
                 .args(RUSTC_EDITION_ARGS)
                 .output(),
@@ -141,7 +141,7 @@ path = "{}.rs""#,
                 // compilation failure, this would silently fail. But we expect
                 // clippy to reflect the same failure while compiling later.
                 Command::new("rustc")
-                    .args(&[self.path.to_str().unwrap(), "-o", &temp_file()])
+                    .args([self.path.to_str().unwrap(), "-o", &temp_file()])
                     .args(RUSTC_COLOR_ARGS)
                     .args(RUSTC_EDITION_ARGS)
                     .output()
@@ -151,14 +151,14 @@ path = "{}.rs""#,
                 // This is already fixed on Clippy's master branch. See this issue to track merging into Cargo:
                 // https://github.com/rust-lang/rust-clippy/issues/3837
                 Command::new("cargo")
-                    .args(&["clean", "--manifest-path", CLIPPY_CARGO_TOML_PATH])
+                    .args(["clean", "--manifest-path", CLIPPY_CARGO_TOML_PATH])
                     .args(RUSTC_COLOR_ARGS)
                     .output()
                     .expect("Failed to run 'cargo clean'");
                 Command::new("cargo")
-                    .args(&["clippy", "--manifest-path", CLIPPY_CARGO_TOML_PATH])
+                    .args(["clippy", "--manifest-path", CLIPPY_CARGO_TOML_PATH])
                     .args(RUSTC_COLOR_ARGS)
-                    .args(&["--", "-D", "warnings", "-D", "clippy::float_cmp"])
+                    .args(["--", "-D", "warnings", "-D", "clippy::float_cmp"])
                     .output()
             }
         }
@@ -183,7 +183,7 @@ path = "{}.rs""#,
             Mode::Test => "--show-output",
             _ => "",
         };
-        let cmd = Command::new(&temp_file())
+        let cmd = Command::new(temp_file())
             .arg(arg)
             .output()
             .expect("Failed to run 'run' command");
@@ -260,7 +260,7 @@ impl Display for Exercise {
 
 #[inline]
 fn clean() {
-    let _ignored = remove_file(&temp_file());
+    let _ignored = remove_file(temp_file());
 }
 
 #[cfg(test)]
@@ -270,7 +270,7 @@ mod test {
 
     #[test]
     fn test_clean() {
-        File::create(&temp_file()).unwrap();
+        File::create(temp_file()).unwrap();
         let exercise = Exercise {
             name: String::from("example"),
             path: PathBuf::from("tests/fixture/state/pending_exercise.rs"),

src/main.rs

@@ -169,7 +169,7 @@ fn main() {
                 let filter_cond = filters
                     .split(',')
                     .filter(|f| !f.trim().is_empty())
-                    .any(|f| e.name.contains(&f) || fname.contains(&f));
+                    .any(|f| e.name.contains(f) || fname.contains(f));
                 let status = if e.looks_done() {
                     exercises_done += 1;
                     "Done"
@@ -429,7 +429,7 @@ fn watch(
 
 fn rustc_exists() -> bool {
     Command::new("rustc")
-        .args(&["--version"])
+        .args(["--version"])
         .stdout(Stdio::null())
         .spawn()
         .and_then(|mut child| child.wait())
@@ -465,7 +465,7 @@ started, here's a couple of notes about how Rustlings operates:
 Got all that? Great! To get started, run `rustlings watch` in order to get the first
 exercise. Make sure to have your editor open!"#;
 
-const FENISH_LINE: &str = r#"+----------------------------------------------------+
+const FENISH_LINE: &str = r"+----------------------------------------------------+
 |          You made it to the Fe-nish line!          |
 +--------------------------  ------------------------+
                           \\/
@@ -490,12 +490,12 @@ If you noticed any issues, please don't hesitate to report them to our repo.
 You can also contribute your own exercises to help the greater community!
 
 Before reporting an issue or contributing, please read our guidelines:
-https://github.com/rust-lang/rustlings/blob/main/CONTRIBUTING.md"#;
+https://github.com/rust-lang/rustlings/blob/main/CONTRIBUTING.md";
 
-const WELCOME: &str = r#"       welcome to...
+const WELCOME: &str = r"       welcome to...
                  _   _ _
   _ __ _   _ ___| |_| (_)_ __   __ _ ___
  | '__| | | / __| __| | | '_ \ / _` / __|
  | |  | |_| \__ \ |_| | | | | | (_| \__ \
  |_|   \__,_|___/\__|_|_|_| |_|\__, |___/
-                               |___/"#;
+                               |___/";

src/project.rs

@@ -86,7 +86,7 @@ impl RustAnalyzerProject {
 
         println!("Determined toolchain: {}\n", &toolchain);
 
-        self.sysroot_src = (std::path::Path::new(&*toolchain)
+        self.sysroot_src = (std::path::Path::new(toolchain)
             .join("lib")
             .join("rustlib")
             .join("src")

src/verify.rs

@@ -134,9 +134,9 @@ fn compile_and_test(
 
 // Compile the given Exercise and return an object with information
 // about the state of the compilation
-fn compile<'a, 'b>(
+fn compile<'a>(
     exercise: &'a Exercise,
-    progress_bar: &'b ProgressBar,
+    progress_bar: &ProgressBar,
 ) -> Result<CompiledExercise<'a>, ()> {
     let compilation_result = exercise.compile();