Fix clippy issues

Author: djc

src/ansi.rs

@@ -314,7 +314,7 @@ mod tests {
 
         fn _check_all_strings_of_len(len: usize, chunk: &mut Vec<u8>) {
             if len == 0 {
-                if let Ok(s) = std::str::from_utf8(chunk) {
+                if let Ok(s) = core::str::from_utf8(chunk) {
                     let old_matches: Vec<_> = STRIP_ANSI_RE.find_iter(s).collect();
                     let new_matches: Vec<_> = Matches::new(s).collect();
                     assert_eq!(old_matches, new_matches);

src/unix_term.rs

@@ -1,3 +1,5 @@
+#[cfg(target_os = "macos")]
+use core::ptr;
 use core::{fmt::Display, mem, str};
 use std::env;
 use std::fs;
@@ -163,7 +165,7 @@ fn select_fd(fd: RawFd, timeout: i32) -> io::Result<bool> {
 
         let mut timeout_val;
         let timeout = if timeout < 0 {
-            std::ptr::null_mut()
+            ptr::null_mut()
         } else {
             timeout_val = libc::timeval {
                 tv_sec: (timeout / 1000) as _,
@@ -177,8 +179,8 @@ fn select_fd(fd: RawFd, timeout: i32) -> io::Result<bool> {
         let ret = libc::select(
             fd + 1,
             &mut read_fd_set,
-            std::ptr::null_mut(),
-            std::ptr::null_mut(),
+            ptr::null_mut(),
+            ptr::null_mut(),
             timeout,
         );
         if ret < 0 {

src/windows_term/colors.rs

@@ -1,7 +1,8 @@
+use crate::ansi::AnsiCodeIterator;
+use core::mem;
+use core::str::{from_utf8, Bytes};
 use std::io;
-use std::mem;
 use std::os::windows::io::AsRawHandle;
-use std::str::Bytes;
 
 use windows_sys::Win32::Foundation::HANDLE;
 use windows_sys::Win32::System::Console::{
@@ -289,9 +290,6 @@ impl Color {
 }
 
 pub(crate) fn console_colors(out: &Term, mut con: Console, bytes: &[u8]) -> io::Result<()> {
-    use crate::ansi::AnsiCodeIterator;
-    use std::str::from_utf8;
-
     let s = from_utf8(bytes).expect("data to be printed is not an ansi string");
     let mut iter = AnsiCodeIterator::new(s);
 

src/windows_term/mod.rs

@@ -1,14 +1,13 @@
-use std::cmp;
+use core::fmt::Display;
+use core::iter::once;
+use core::mem::{self, MaybeUninit};
+use core::{char, cmp};
 use std::env;
 use std::ffi::OsStr;
-use std::fmt::Display;
 use std::io;
-use std::iter::once;
-use std::mem;
 use std::os::raw::c_void;
 use std::os::windows::ffi::OsStrExt;
 use std::os::windows::io::AsRawHandle;
-use std::{char, mem::MaybeUninit};
 
 use encode_unicode::error::Utf16TupleError;
 use encode_unicode::CharExt;
@@ -590,7 +589,7 @@ pub(crate) fn msys_tty_on(term: &Term) -> bool {
             handle as HANDLE,
             FileNameInfo,
             &mut name_info as *mut _ as *mut c_void,
-            std::mem::size_of::<FILE_NAME_INFO>() as u32,
+            mem::size_of::<FILE_NAME_INFO>() as u32,
         );
         if res == 0 {
             return false;