style: fix clippy

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rust_util"
-version = "0.5.0"
+version = "0.6.0"
 authors = ["Hatter Jiang <jht5945@gmail.com>"]
 edition = "2018"
 description = "Hatter's Rust Util"

src/lib.rs

@@ -2,7 +2,7 @@
 extern crate lazy_static;
 extern crate term;
 
-use std::io::{ Error, ErrorKind, };
+use std::io::{ Error, ErrorKind };
 
 pub mod util_io;
 pub mod util_os;
@@ -16,11 +16,8 @@ pub mod util_time;
 
 /// iff!(condition, result_when_true, result_when_false)
 #[macro_export] macro_rules! iff {
-    ($c:expr, $t:expr, $f:expr) => {
-        if $c { $t } else { $f }
-    };
+    ($c:expr, $t:expr, $f:expr) => ( if $c { $t } else { $f } )
 }
-
 #[macro_export] macro_rules! information {
     ($($arg:tt)+) => ( crate::util_msg::print_info(&format!($($arg)+)); )
 }

src/util_cmd.rs

@@ -1,6 +1,5 @@
-
 use std::{
-    io::{self, Error, ErrorKind},
+    io::{ self, Error, ErrorKind },
     process::Command,
 };
 

src/util_file.rs

@@ -1,9 +1,9 @@
 
 use std::{
     env,
-    fs::{self, File},
-    io::{Lines, BufReader},
-    path::{Path, PathBuf},
+    fs::{ self, File },
+    io::{ Lines, BufReader },
+    path::{ Path, PathBuf },
 };
 
 use super::{
@@ -143,8 +143,8 @@ pub fn walk_dir<FError, FProcess, FFilter>(dir: &Path,
         func_walk_error: &FError,
         func_process_file: &FProcess,
         func_filter_dir: &FFilter) -> XResult<()>
-        where FError: Fn(&Path, Box<dyn std::error::Error>) -> (),
-              FProcess: Fn(&Path) -> (),
+        where FError: Fn(&Path, Box<dyn std::error::Error>),
+              FProcess: Fn(&Path),
               FFilter: Fn(&Path) -> bool {
     walk_dir_with_depth_check(&mut 0u32, dir, func_walk_error, func_process_file, func_filter_dir)
 }
@@ -153,8 +153,8 @@ fn walk_dir_with_depth_check<FError, FProcess, FFilter>(depth: &mut u32, dir: &P
         func_walk_error: &FError,
         func_process_file: &FProcess,
         func_filter_dir: &FFilter) -> XResult<()>
-        where FError: Fn(&Path, Box<dyn std::error::Error>) -> (),
-              FProcess: Fn(&Path) -> (),
+        where FError: Fn(&Path, Box<dyn std::error::Error>),
+              FProcess: Fn(&Path),
               FFilter: Fn(&Path) -> bool {
     if *depth > 100u32 {
         return Err(new_box_ioerror(&format!("Depth exceed, depth: {}, path: {:?}", *depth, dir)));

src/util_io.rs

@@ -1,11 +1,7 @@
-
 use std::{
     fs::File,
-    io::{self,
-        ErrorKind,
-        prelude::*,
-    },
-    time::{SystemTime, Duration},
+    io::{ self, ErrorKind, prelude::* },
+    time::{ SystemTime, Duration },
 };
 
 use super::{ XResult, new_box_ioerror, };
@@ -66,12 +62,9 @@ pub fn print_status_last_line(head: &str, total: i64, written: i64, cost: Durati
 
 pub fn copy_io_with_head<R: ?Sized, W: ?Sized>(reader: &mut R, writer: &mut W, total: i64, head: &str) -> io::Result<u64>
         where R: io::Read, W: io::Write {
-    //let written_cell = RefCell::new(0u64);
     let start = SystemTime::now();
     let written = copy_io_callback(reader, writer, total, &|total, written, _len| {
-        //written_cell.replace_with(|&mut w| w + len as u64);
-        //let written = *written_cell.borrow();
-        let cost = SystemTime::now().duration_since(start.clone()).unwrap();
+        let cost = SystemTime::now().duration_since(start).unwrap();
         print_status_last_line(head, total, written as i64, cost);
     });
     println!();
@@ -81,7 +74,7 @@ pub fn copy_io_with_head<R: ?Sized, W: ?Sized>(reader: &mut R, writer: &mut W, t
 pub fn copy_io_callback<R: ?Sized, W: ?Sized, FCallback>(reader: &mut R, writer: &mut W, total: i64, callback: &FCallback) -> io::Result<u64>
         where R: io::Read,
               W: io::Write,
-              FCallback: Fn(i64, u64, usize) -> () {
+              FCallback: Fn(i64, u64, usize) {
     let mut written = 0u64;
     let mut buf: [u8; DEFAULT_BUF_SIZE] = [0u8; DEFAULT_BUF_SIZE];
     loop {

src/util_msg.rs

@@ -1,6 +1,6 @@
 use std::{
-    io::{self, Write},
-    sync::{Arc, Mutex},
+    io::{ self, Write },
+    sync::{ Arc, Mutex },
 };
 
 lazy_static! {