Fix clippy warnings for examples

CHANGELOG.adoc

@@ -14,6 +14,12 @@ All notable changes to this project will be documented in this file.
 The format is based on https://keepachangelog.com/[Keep a Changelog], and this
 project adheres to https://semver.org/[Semantic Versioning].
 
+== {compare-url}/v0.7.7\...HEAD[Unreleased]
+
+=== Fixed
+
+* Fix clippy warnings for examples ({pull-request-url}/70[#70])
+
 == {compare-url}/v0.7.6\...v0.7.7[0.7.7] - 2023-12-07
 
 === Changed

examples/cat.rs

@@ -13,12 +13,13 @@
 // Lint levels of Clippy.
 #![warn(clippy::cargo, clippy::nursery, clippy::pedantic)]
 
-#[cfg(feature = "std")]
-use std::io::Read;
-
 #[cfg(feature = "std")]
 fn main() -> std::process::ExitCode {
-    use std::{env, fs, io, process::ExitCode};
+    use std::{
+        env, fs,
+        io::{self, Read},
+        process::ExitCode,
+    };
 
     let args: Vec<_> = env::args_os().skip(1).collect();
 
@@ -34,8 +35,7 @@ fn main() -> std::process::ExitCode {
         Ok(strings) => strings,
         Err(err) => {
             eprintln!("Error: {err}");
-            return sysexits::ExitCode::try_from(err.kind())
-                .map_or(ExitCode::FAILURE, ExitCode::from);
+            return sysexits::ExitCode::from(err).into();
         }
     };
 

examples/cmp.rs

@@ -11,9 +11,6 @@
 // Lint levels of Clippy.
 #![warn(clippy::cargo, clippy::nursery, clippy::pedantic)]
 
-#[cfg(feature = "std")]
-use std::process::Termination;
-
 #[cfg(feature = "std")]
 enum ExitCode {
     Same,
@@ -30,7 +27,7 @@ impl From<sysexits::ExitCode> for ExitCode {
 }
 
 #[cfg(feature = "std")]
-impl Termination for ExitCode {
+impl std::process::Termination for ExitCode {
     fn report(self) -> std::process::ExitCode {
         use std::process::ExitCode;
 
@@ -49,7 +46,7 @@ fn main() -> ExitCode {
 
     let args: Vec<_> = env::args_os().skip(1).take(2).collect();
 
-    let files = if let (Some(from), Some(to)) = (args.get(0), args.get(1)) {
+    let files = if let (Some(from), Some(to)) = (args.first(), args.get(1)) {
         (PathBuf::from(from), PathBuf::from(to))
     } else {
         eprintln!("Error: files are missing");
@@ -60,8 +57,7 @@ fn main() -> ExitCode {
         Ok(bytes) => bytes,
         Err(err) => {
             eprintln!("Error: {err}");
-            return sysexits::ExitCode::try_from(err.kind())
-                .map_or(ExitCode::Trouble, ExitCode::from);
+            return sysexits::ExitCode::from(err).into();
         }
     };
 

examples/isutf8.rs

@@ -12,12 +12,13 @@
 // Lint levels of Clippy.
 #![warn(clippy::cargo, clippy::nursery, clippy::pedantic)]
 
-#[cfg(feature = "std")]
-use std::io::Read;
-
 #[cfg(feature = "std")]
 fn main() -> sysexits::ExitCode {
-    use std::{env, fs, io, str};
+    use std::{
+        env, fs,
+        io::{self, Read},
+        str,
+    };
 
     use sysexits::ExitCode;