Format with rustfmt (#389)

* Format with rustfmt

* Add rustfmt check to CI

azure-pipelines.yml

@@ -3,9 +3,10 @@ pr: ["master"]
 
 jobs:
 # Check formatting
-# - template: ci/azure-rustfmt.yml
+- template: ci/azure-rustfmt.yml
-#   parameters:
+  parameters:
-#     name: rustfmt
+    name: rustfmt
+    rust_version: stable
 
 # Apply clippy lints
 # - template: ci/azure-clippy.yml
@@ -60,7 +61,7 @@ jobs:
 - template: ci/azure-deploy-docs.yml
   parameters:
     dependsOn:
-      # - rustfmt
+      - rustfmt
       # - clippy
       - stable
       - nightly

benches/buf.rs

@@ -3,8 +3,8 @@
 
 extern crate test;
 
-use test::Bencher;
 use bytes::Buf;
+use test::Bencher;
 
 /// Dummy Buf implementation
 struct TestBuf {

benches/bytes.rs

@@ -3,8 +3,8 @@
 
 extern crate test;
 
-use test::Bencher;
 use bytes::Bytes;
+use test::Bencher;
 
 #[bench]
 fn deref_unique(b: &mut Bencher) {
@@ -42,7 +42,8 @@ fn deref_static(b: &mut Bencher) {
 
 #[bench]
 fn clone_static(b: &mut Bencher) {
-    let bytes = Bytes::from_static("hello world 1234567890 and have a good byte 0987654321".as_bytes());
+    let bytes =
+        Bytes::from_static("hello world 1234567890 and have a good byte 0987654321".as_bytes());
 
     b.iter(|| {
         for _ in 0..1024 {

benches/bytes_mut.rs

@@ -3,8 +3,8 @@
 
 extern crate test;
 
-use test::Bencher;
 use bytes::{BufMut, BytesMut};
+use test::Bencher;
 
 #[bench]
 fn alloc_small(b: &mut Bencher) {
@@ -29,7 +29,6 @@ fn alloc_big(b: &mut Bencher) {
     })
 }
 
-
 #[bench]
 fn deref_unique(b: &mut Bencher) {
     let mut buf = BytesMut::with_capacity(4096);
@@ -92,7 +91,9 @@ fn deref_two(b: &mut Bencher) {
 
 #[bench]
 fn clone_frozen(b: &mut Bencher) {
-    let bytes = BytesMut::from(&b"hello world 1234567890 and have a good byte 0987654321"[..]).split().freeze();
+    let bytes = BytesMut::from(&b"hello world 1234567890 and have a good byte 0987654321"[..])
+        .split()
+        .freeze();
 
     b.iter(|| {
         for _ in 0..1024 {
@@ -137,7 +138,9 @@ fn fmt_write(b: &mut Bencher) {
     b.iter(|| {
         let _ = write!(buf, "{}", s);
         test::black_box(&buf);
-        unsafe { buf.set_len(0); }
+        unsafe {
+            buf.set_len(0);
+        }
     })
 }
 
@@ -152,7 +155,9 @@ fn bytes_mut_extend(b: &mut Bencher) {
             buf.extend(&data);
         }
         test::black_box(&buf);
-        unsafe { buf.set_len(0); }
+        unsafe {
+            buf.set_len(0);
+        }
     });
 }
 
@@ -169,7 +174,9 @@ fn put_slice_bytes_mut(b: &mut Bencher) {
             buf.put_slice(&data);
         }
         test::black_box(&buf);
-        unsafe { buf.set_len(0); }
+        unsafe {
+            buf.set_len(0);
+        }
     });
 }
 
@@ -184,7 +191,9 @@ fn put_u8_bytes_mut(b: &mut Bencher) {
             buf.put_u8(b'x');
         }
         test::black_box(&buf);
-        unsafe { buf.set_len(0); }
+        unsafe {
+            buf.set_len(0);
+        }
     });
 }
 
@@ -199,7 +208,9 @@ fn put_slice_vec(b: &mut Bencher) {
             buf.put_slice(&data);
         }
         test::black_box(&buf);
-        unsafe { buf.set_len(0); }
+        unsafe {
+            buf.set_len(0);
+        }
     });
 }
 
@@ -214,7 +225,9 @@ fn put_u8_vec(b: &mut Bencher) {
             buf.put_u8(b'x');
         }
         test::black_box(&buf);
-        unsafe { buf.set_len(0); }
+        unsafe {
+            buf.set_len(0);
+        }
     });
 }
 
@@ -229,7 +242,9 @@ fn put_slice_vec_extend(b: &mut Bencher) {
             buf.extend_from_slice(&data);
         }
         test::black_box(&buf);
-        unsafe { buf.set_len(0); }
+        unsafe {
+            buf.set_len(0);
+        }
     });
 }
 
@@ -244,6 +259,8 @@ fn put_u8_vec_push(b: &mut Bencher) {
             buf.push(b'x');
         }
         test::black_box(&buf);
-        unsafe { buf.set_len(0); }
+        unsafe {
+            buf.set_len(0);
+        }
     });
 }

ci/azure-rustfmt.yml

@@ -0,0 +1,13 @@
+jobs:
+# Check formatting
+- job: ${{ parameters.name }}
+  displayName: Check rustfmt
+  pool:
+    vmImage: ubuntu-16.04
+  steps:
+    - template: azure-install-rust.yml
+      parameters:
+        rust_version: ${{ parameters.rust_version }}
+    - script: |
+        cargo fmt --all -- --check
+      displayName: Check formatting

src/buf/buf_impl.rs

@@ -1,22 +1,23 @@
-use core::{cmp, ptr, mem};
+use core::{cmp, mem, ptr};
 
 #[cfg(feature = "std")]
 use std::io::IoSlice;
 
-use alloc::{boxed::Box};
+use alloc::boxed::Box;
 
 macro_rules! buf_get_impl {
-    ($this:ident, $typ:tt::$conv:tt) => ({
+    ($this:ident, $typ:tt::$conv:tt) => {{
         const SIZE: usize = mem::size_of::<$typ>();
-         // try to convert directly from the bytes
+        // try to convert directly from the bytes
-         // this Option<ret> trick is to avoid keeping a borrow on self
+        // this Option<ret> trick is to avoid keeping a borrow on self
-         // when advance() is called (mut borrow) and to call bytes() only once
+        // when advance() is called (mut borrow) and to call bytes() only once
-        let ret =  $this.bytes().get(..SIZE).map(|src| unsafe {
+        let ret = $this
-            $typ::$conv(*(src as *const _ as *const [_; SIZE]))
+            .bytes()
-        });
+            .get(..SIZE)
+            .map(|src| unsafe { $typ::$conv(*(src as *const _ as *const [_; SIZE])) });
 
         if let Some(ret) = ret {
-             // if the direct conversion was possible, advance and return
+            // if the direct conversion was possible, advance and return
             $this.advance(SIZE);
             return ret;
         } else {
@@ -25,8 +26,8 @@ macro_rules! buf_get_impl {
             $this.copy_to_slice(&mut buf); // (do the advance)
             return $typ::$conv(buf);
         }
-    });
+    }};
-    (le => $this:ident, $typ:tt, $len_to_read:expr) => ({
+    (le => $this:ident, $typ:tt, $len_to_read:expr) => {{
         debug_assert!(mem::size_of::<$typ>() >= $len_to_read);
 
         // The same trick as above does not improve the best case speed.
@@ -34,12 +35,12 @@ macro_rules! buf_get_impl {
         let mut buf = [0; (mem::size_of::<$typ>())];
         $this.copy_to_slice(&mut buf[..($len_to_read)]);
         return $typ::from_le_bytes(buf);
-    });
+    }};
     (be => $this:ident, $typ:tt, $len_to_read:expr) => {{
         debug_assert!(mem::size_of::<$typ>() >= $len_to_read);
 
         let mut buf = [0; (mem::size_of::<$typ>())];
-        $this.copy_to_slice(&mut buf[mem::size_of::<$typ>()-($len_to_read)..]);
+        $this.copy_to_slice(&mut buf[mem::size_of::<$typ>() - ($len_to_read)..]);
         return $typ::from_be_bytes(buf);
     }};
 }
@@ -251,8 +252,7 @@ pub trait Buf {
                 let src = self.bytes();
                 cnt = cmp::min(src.len(), dst.len() - off);
 
-                ptr::copy_nonoverlapping(
+                ptr::copy_nonoverlapping(src.as_ptr(), dst[off..].as_mut_ptr(), cnt);
-                    src.as_ptr(), dst[off..].as_mut_ptr(), cnt);
 
                 off += cnt;
             }
@@ -810,109 +810,108 @@ pub trait Buf {
 }
 
 macro_rules! deref_forward_buf {
-    () => (
+    () => {
-    fn remaining(&self) -> usize {
+        fn remaining(&self) -> usize {
-        (**self).remaining()
+            (**self).remaining()
-    }
+        }
 
-    fn bytes(&self) -> &[u8] {
+        fn bytes(&self) -> &[u8] {
-        (**self).bytes()
+            (**self).bytes()
-    }
+        }
 
-    #[cfg(feature = "std")]
+        #[cfg(feature = "std")]
-    fn bytes_vectored<'b>(&'b self, dst: &mut [IoSlice<'b>]) -> usize {
+        fn bytes_vectored<'b>(&'b self, dst: &mut [IoSlice<'b>]) -> usize {
-        (**self).bytes_vectored(dst)
+            (**self).bytes_vectored(dst)
-    }
+        }
 
-    fn advance(&mut self, cnt: usize) {
+        fn advance(&mut self, cnt: usize) {
-        (**self).advance(cnt)
+            (**self).advance(cnt)
-    }
+        }
 
-    fn has_remaining(&self) -> bool {
+        fn has_remaining(&self) -> bool {
-        (**self).has_remaining()
+            (**self).has_remaining()
-    }
+        }
 
-    fn copy_to_slice(&mut self, dst: &mut [u8]) {
+        fn copy_to_slice(&mut self, dst: &mut [u8]) {
-        (**self).copy_to_slice(dst)
+            (**self).copy_to_slice(dst)
-    }
+        }
 
-    fn get_u8(&mut self) -> u8 {
+        fn get_u8(&mut self) -> u8 {
-        (**self).get_u8()
+            (**self).get_u8()
-    }
+        }
 
-    fn get_i8(&mut self) -> i8 {
+        fn get_i8(&mut self) -> i8 {
-        (**self).get_i8()
+            (**self).get_i8()
-    }
+        }
 
-    fn get_u16(&mut self) -> u16 {
+        fn get_u16(&mut self) -> u16 {
-        (**self).get_u16()
+            (**self).get_u16()
-    }
+        }
 
-    fn get_u16_le(&mut self) -> u16 {
+        fn get_u16_le(&mut self) -> u16 {
-        (**self).get_u16_le()
+            (**self).get_u16_le()
-    }
+        }
 
-    fn get_i16(&mut self) -> i16 {
+        fn get_i16(&mut self) -> i16 {
-        (**self).get_i16()
+            (**self).get_i16()
-    }
+        }
 
-    fn get_i16_le(&mut self) -> i16 {
+        fn get_i16_le(&mut self) -> i16 {
-        (**self).get_i16_le()
+            (**self).get_i16_le()
-    }
+        }
 
-    fn get_u32(&mut self) -> u32 {
+        fn get_u32(&mut self) -> u32 {
-        (**self).get_u32()
+            (**self).get_u32()
-    }
+        }
 
-    fn get_u32_le(&mut self) -> u32 {
+        fn get_u32_le(&mut self) -> u32 {
-        (**self).get_u32_le()
+            (**self).get_u32_le()
-    }
+        }
 
-    fn get_i32(&mut self) -> i32 {
+        fn get_i32(&mut self) -> i32 {
-        (**self).get_i32()
+            (**self).get_i32()
-    }
+        }
 
-    fn get_i32_le(&mut self) -> i32 {
+        fn get_i32_le(&mut self) -> i32 {
-        (**self).get_i32_le()
+            (**self).get_i32_le()
-    }
+        }
 
-    fn get_u64(&mut self) -> u64 {
+        fn get_u64(&mut self) -> u64 {
-        (**self).get_u64()
+            (**self).get_u64()
-    }
+        }
 
-    fn get_u64_le(&mut self) -> u64 {
+        fn get_u64_le(&mut self) -> u64 {
-        (**self).get_u64_le()
+            (**self).get_u64_le()
-    }
+        }
 
-    fn get_i64(&mut self) -> i64 {
+        fn get_i64(&mut self) -> i64 {
-        (**self).get_i64()
+            (**self).get_i64()
-    }
+        }
 
-    fn get_i64_le(&mut self) -> i64 {
+        fn get_i64_le(&mut self) -> i64 {
-        (**self).get_i64_le()
+            (**self).get_i64_le()
-    }
+        }
 
-    fn get_uint(&mut self, nbytes: usize) -> u64 {
+        fn get_uint(&mut self, nbytes: usize) -> u64 {
-        (**self).get_uint(nbytes)
+            (**self).get_uint(nbytes)
-    }
+        }
 
-    fn get_uint_le(&mut self, nbytes: usize) -> u64 {
+        fn get_uint_le(&mut self, nbytes: usize) -> u64 {
-        (**self).get_uint_le(nbytes)
+            (**self).get_uint_le(nbytes)
-    }
+        }
 
-    fn get_int(&mut self, nbytes: usize) -> i64 {
+        fn get_int(&mut self, nbytes: usize) -> i64 {
-        (**self).get_int(nbytes)
+            (**self).get_int(nbytes)
-    }
+        }
 
-    fn get_int_le(&mut self, nbytes: usize) -> i64 {
+        fn get_int_le(&mut self, nbytes: usize) -> i64 {
-        (**self).get_int_le(nbytes)
+            (**self).get_int_le(nbytes)
-    }
+        }
 
-    fn to_bytes(&mut self) -> crate::Bytes {
+        fn to_bytes(&mut self) -> crate::Bytes {
-        (**self).to_bytes()
+            (**self).to_bytes()
-    }
+        }
-
+    };
-    )
 }
 
 impl<T: Buf + ?Sized> Buf for &mut T {
@@ -950,7 +949,8 @@ impl Buf for Option<[u8; 1]> {
     }
 
     fn bytes(&self) -> &[u8] {
-        self.as_ref().map(AsRef::as_ref)
+        self.as_ref()
+            .map(AsRef::as_ref)
             .unwrap_or(Default::default())
     }
 
@@ -994,7 +994,8 @@ impl<T: AsRef<[u8]>> Buf for std::io::Cursor<T> {
 
     fn advance(&mut self, cnt: usize) {
         let pos = (self.position() as usize)
-            .checked_add(cnt).expect("overflow");
+            .checked_add(cnt)
+            .expect("overflow");
 
         assert!(pos <= self.get_ref().as_ref().len());
         self.set_position(pos as u64);

src/buf/buf_mut.rs

@@ -1,9 +1,13 @@
-use core::{cmp, mem::{self, MaybeUninit}, ptr, usize};
+use core::{
+    cmp,
+    mem::{self, MaybeUninit},
+    ptr, usize,
+};
 
 #[cfg(feature = "std")]
 use std::fmt;
 
-use alloc::{vec::Vec, boxed::Box};
+use alloc::{boxed::Box, vec::Vec};
 
 /// A trait for values that provide sequential write access to bytes.
 ///
@@ -226,7 +230,10 @@ pub trait BufMut {
     /// # Panics
     ///
     /// Panics if `self` does not have enough capacity to contain `src`.
-    fn put<T: super::Buf>(&mut self, mut src: T) where Self: Sized {
+    fn put<T: super::Buf>(&mut self, mut src: T)
+    where
+        Self: Sized,
+    {
         assert!(self.remaining_mut() >= src.remaining());
 
         while src.has_remaining() {
@@ -237,14 +244,13 @@ pub trait BufMut {
                 let d = self.bytes_mut();
                 l = cmp::min(s.len(), d.len());
 
-                ptr::copy_nonoverlapping(
+                ptr::copy_nonoverlapping(s.as_ptr(), d.as_mut_ptr() as *mut u8, l);
-                    s.as_ptr(),
-                    d.as_mut_ptr() as *mut u8,
-                    l);
             }
 
             src.advance(l);
-            unsafe { self.advance_mut(l); }
+            unsafe {
+                self.advance_mut(l);
+            }
         }
     }
 
@@ -270,7 +276,12 @@ pub trait BufMut {
     fn put_slice(&mut self, src: &[u8]) {
         let mut off = 0;
 
-        assert!(self.remaining_mut() >= src.len(), "buffer overflow; remaining = {}; src = {}", self.remaining_mut(), src.len());
+        assert!(
+            self.remaining_mut() >= src.len(),
+            "buffer overflow; remaining = {}; src = {}",
+            self.remaining_mut(),
+            src.len()
+        );
 
         while off < src.len() {
             let cnt;
@@ -279,16 +290,14 @@ pub trait BufMut {
                 let dst = self.bytes_mut();
                 cnt = cmp::min(dst.len(), src.len() - off);
 
-                ptr::copy_nonoverlapping(
+                ptr::copy_nonoverlapping(src[off..].as_ptr(), dst.as_mut_ptr() as *mut u8, cnt);
-                    src[off..].as_ptr(),
-                    dst.as_mut_ptr() as *mut u8,
-                    cnt);
 
                 off += cnt;
-
             }
 
-            unsafe { self.advance_mut(cnt); }
+            unsafe {
+                self.advance_mut(cnt);
+            }
         }
     }
 
@@ -872,84 +881,84 @@ pub trait BufMut {
 }
 
 macro_rules! deref_forward_bufmut {
-    () => (
+    () => {
-    fn remaining_mut(&self) -> usize {
+        fn remaining_mut(&self) -> usize {
-        (**self).remaining_mut()
+            (**self).remaining_mut()
-    }
+        }
 
-    fn bytes_mut(&mut self) -> &mut [MaybeUninit<u8>] {
+        fn bytes_mut(&mut self) -> &mut [MaybeUninit<u8>] {
-        (**self).bytes_mut()
+            (**self).bytes_mut()
-    }
+        }
 
-    #[cfg(feature = "std")]
+        #[cfg(feature = "std")]
-    fn bytes_vectored_mut<'b>(&'b mut self, dst: &mut [IoSliceMut<'b>]) -> usize {
+        fn bytes_vectored_mut<'b>(&'b mut self, dst: &mut [IoSliceMut<'b>]) -> usize {
-        (**self).bytes_vectored_mut(dst)
+            (**self).bytes_vectored_mut(dst)
-    }
+        }
 
-    unsafe fn advance_mut(&mut self, cnt: usize) {
+        unsafe fn advance_mut(&mut self, cnt: usize) {
-        (**self).advance_mut(cnt)
+            (**self).advance_mut(cnt)
-    }
+        }
 
-    fn put_slice(&mut self, src: &[u8]) {
+        fn put_slice(&mut self, src: &[u8]) {
-        (**self).put_slice(src)
+            (**self).put_slice(src)
-    }
+        }
 
-    fn put_u8(&mut self, n: u8) {
+        fn put_u8(&mut self, n: u8) {
-        (**self).put_u8(n)
+            (**self).put_u8(n)
-    }
+        }
 
-    fn put_i8(&mut self, n: i8) {
+        fn put_i8(&mut self, n: i8) {
-        (**self).put_i8(n)
+            (**self).put_i8(n)
-    }
+        }
 
-    fn put_u16(&mut self, n: u16) {
+        fn put_u16(&mut self, n: u16) {
-        (**self).put_u16(n)
+            (**self).put_u16(n)
-    }
+        }
 
-    fn put_u16_le(&mut self, n: u16) {
+        fn put_u16_le(&mut self, n: u16) {
-        (**self).put_u16_le(n)
+            (**self).put_u16_le(n)
-    }
+        }
 
-    fn put_i16(&mut self, n: i16) {
+        fn put_i16(&mut self, n: i16) {
-        (**self).put_i16(n)
+            (**self).put_i16(n)
-    }
+        }
 
-    fn put_i16_le(&mut self, n: i16) {
+        fn put_i16_le(&mut self, n: i16) {
-        (**self).put_i16_le(n)
+            (**self).put_i16_le(n)
-    }
+        }
 
-    fn put_u32(&mut self, n: u32) {
+        fn put_u32(&mut self, n: u32) {
-        (**self).put_u32(n)
+            (**self).put_u32(n)
-    }
+        }
 
-    fn put_u32_le(&mut self, n: u32) {
+        fn put_u32_le(&mut self, n: u32) {
-        (**self).put_u32_le(n)
+            (**self).put_u32_le(n)
-    }
+        }
 
-    fn put_i32(&mut self, n: i32) {
+        fn put_i32(&mut self, n: i32) {
-        (**self).put_i32(n)
+            (**self).put_i32(n)
-    }
+        }
 
-    fn put_i32_le(&mut self, n: i32) {
+        fn put_i32_le(&mut self, n: i32) {
-        (**self).put_i32_le(n)
+            (**self).put_i32_le(n)
-    }
+        }
 
-    fn put_u64(&mut self, n: u64) {
+        fn put_u64(&mut self, n: u64) {
-        (**self).put_u64(n)
+            (**self).put_u64(n)
-    }
+        }
 
-    fn put_u64_le(&mut self, n: u64) {
+        fn put_u64_le(&mut self, n: u64) {
-        (**self).put_u64_le(n)
+            (**self).put_u64_le(n)
-    }
+        }
 
-    fn put_i64(&mut self, n: i64) {
+        fn put_i64(&mut self, n: i64) {
-        (**self).put_i64(n)
+            (**self).put_i64(n)
-    }
+        }
 
-    fn put_i64_le(&mut self, n: i64) {
+        fn put_i64_le(&mut self, n: i64) {
-        (**self).put_i64_le(n)
+            (**self).put_i64_le(n)
-    }
+        }
-    )
+    };
 }
 
 impl<T: BufMut + ?Sized> BufMut for &mut T {
@@ -1013,15 +1022,16 @@ impl BufMut for Vec<u8> {
         let len = self.len();
 
         let ptr = self.as_mut_ptr() as *mut MaybeUninit<u8>;
-        unsafe {
+        unsafe { &mut slice::from_raw_parts_mut(ptr, cap)[len..] }
-            &mut slice::from_raw_parts_mut(ptr, cap)[len..]
-        }
     }
 
     // Specialize these methods so they can skip checking `remaining_mut`
     // and `advance_mut`.
 
-    fn put<T: super::Buf>(&mut self, mut src: T) where Self: Sized {
+    fn put<T: super::Buf>(&mut self, mut src: T)
+    where
+        Self: Sized,
+    {
         // In case the src isn't contiguous, reserve upfront
         self.reserve(src.remaining());
 

src/buf/ext/chain.rs

@@ -1,12 +1,12 @@
-use crate::{Buf, BufMut};
 use crate::buf::IntoIter;
+use crate::{Buf, BufMut};
 
 use core::mem::MaybeUninit;
 
-#[cfg(feature = "std")]
-use std::io::{IoSlice};
 #[cfg(feature = "std")]
 use crate::buf::IoSliceMut;
+#[cfg(feature = "std")]
+use std::io::IoSlice;
 
 /// A `Chain` sequences two buffers.
 ///
@@ -41,10 +41,7 @@ pub struct Chain<T, U> {
 impl<T, U> Chain<T, U> {
     /// Creates a new `Chain` sequencing the provided values.
     pub fn new(a: T, b: U) -> Chain<T, U> {
-        Chain {
+        Chain { a, b }
-            a,
-            b,
-        }
     }
 
     /// Gets a reference to the first underlying `Buf`.
@@ -137,8 +134,9 @@ impl<T, U> Chain<T, U> {
 }
 
 impl<T, U> Buf for Chain<T, U>
-    where T: Buf,
+where
-          U: Buf,
+    T: Buf,
+    U: Buf,
 {
     fn remaining(&self) -> usize {
         self.a.remaining() + self.b.remaining()
@@ -179,8 +177,9 @@ impl<T, U> Buf for Chain<T, U>
 }
 
 impl<T, U> BufMut for Chain<T, U>
-    where T: BufMut,
+where
-          U: BufMut,
+    T: BufMut,
+    U: BufMut,
 {
     fn remaining_mut(&self) -> usize {
         self.a.remaining_mut() + self.b.remaining_mut()

src/buf/ext/limit.rs

@@ -11,10 +11,7 @@ pub struct Limit<T> {
 }
 
 pub(super) fn new<T>(inner: T, limit: usize) -> Limit<T> {
-    Limit {
+    Limit { inner, limit }
-        inner,
-        limit,
-    }
 }
 
 impl<T> Limit<T> {

src/buf/ext/mod.rs

@@ -10,9 +10,9 @@ mod take;
 #[cfg(feature = "std")]
 mod writer;
 
+pub use self::chain::Chain;
 pub use self::limit::Limit;
 pub use self::take::Take;
-pub use self::chain::Chain;
 
 #[cfg(feature = "std")]
 pub use self::{reader::Reader, writer::Writer};
@@ -41,7 +41,8 @@ pub trait BufExt: Buf {
     /// assert_eq!(dst, b" world");
     /// ```
     fn take(self, limit: usize) -> Take<Self>
-        where Self: Sized
+    where
+        Self: Sized,
     {
         take::new(self, limit)
     }
@@ -62,7 +63,8 @@ pub trait BufExt: Buf {
     /// assert_eq!(full.bytes(), b"hello world");
     /// ```
     fn chain<U: Buf>(self, next: U) -> Chain<Self, U>
-        where Self: Sized
+    where
+        Self: Sized,
     {
         Chain::new(self, next)
     }
@@ -91,7 +93,10 @@ pub trait BufExt: Buf {
     /// assert_eq!(&dst[..11], &b"hello world"[..]);
     /// ```
     #[cfg(feature = "std")]
-    fn reader(self) -> Reader<Self> where Self: Sized {
+    fn reader(self) -> Reader<Self>
+    where
+        Self: Sized,
+    {
         reader::new(self)
     }
 }
@@ -114,7 +119,8 @@ pub trait BufMutExt: BufMut {
     /// assert_eq!(dst.remaining_mut(), 10);
     /// ```
     fn limit(self, limit: usize) -> Limit<Self>
-        where Self: Sized
+    where
+        Self: Sized,
     {
         limit::new(self, limit)
     }
@@ -142,7 +148,10 @@ pub trait BufMutExt: BufMut {
     /// assert_eq!(*buf, b"hello world"[..]);
     /// ```
     #[cfg(feature = "std")]
-    fn writer(self) -> Writer<Self> where Self: Sized {
+    fn writer(self) -> Writer<Self>
+    where
+        Self: Sized,
+    {
         writer::new(self)
     }
 
@@ -167,7 +176,8 @@ pub trait BufMutExt: BufMut {
     /// assert_eq!(&b[..], b" world");
     /// ```
     fn chain_mut<U: BufMut>(self, next: U) -> Chain<Self, U>
-        where Self: Sized
+    where
+        Self: Sized,
     {
         Chain::new(self, next)
     }

src/buf/ext/reader.rs

@@ -1,4 +1,4 @@
-use crate::{Buf};
+use crate::Buf;
 
 use std::{cmp, io};
 

src/buf/ext/take.rs

@@ -13,10 +13,7 @@ pub struct Take<T> {
 }
 
 pub fn new<T>(inner: T, limit: usize) -> Take<T> {
-    Take {
+    Take { inner, limit }
-        inner,
-        limit,
-    }
 }
 
 impl<T> Take<T> {

src/buf/iter.rs

@@ -109,7 +109,6 @@ impl<T> IntoIter<T> {
     }
 }
 
-
 impl<T: Buf> Iterator for IntoIter<T> {
     type Item = u8;
 
@@ -130,4 +129,4 @@ impl<T: Buf> Iterator for IntoIter<T> {
     }
 }
 
-impl<T: Buf> ExactSizeIterator for IntoIter<T> { }
+impl<T: Buf> ExactSizeIterator for IntoIter<T> {}

src/buf/mod.rs

@@ -24,8 +24,7 @@ mod vec_deque;
 
 pub use self::buf_impl::Buf;
 pub use self::buf_mut::BufMut;
-pub use self::ext::{BufExt, BufMutExt};
 #[cfg(feature = "std")]
 pub use self::buf_mut::IoSliceMut;
+pub use self::ext::{BufExt, BufMutExt};
 pub use self::iter::IntoIter;
-

src/bytes.rs

@@ -1,15 +1,14 @@
-use core::{cmp, fmt, hash, mem, ptr, slice, usize};
+use core::iter::FromIterator;
-use core::iter::{FromIterator};
 use core::ops::{Deref, RangeBounds};
+use core::{cmp, fmt, hash, mem, ptr, slice, usize};
 
-use alloc::{vec::Vec, string::String, boxed::Box, borrow::Borrow};
+use alloc::{borrow::Borrow, boxed::Box, string::String, vec::Vec};
 
-use crate::Buf;
 use crate::buf::IntoIter;
-use crate::loom::sync::atomic::{self, AtomicPtr, AtomicUsize, Ordering};
 #[allow(unused)]
 use crate::loom::sync::atomic::AtomicMut;
-
+use crate::loom::sync::atomic::{self, AtomicPtr, AtomicUsize, Ordering};
+use crate::Buf;
 
 /// A reference counted contiguous slice of memory.
 ///
@@ -176,7 +175,6 @@ impl Bytes {
         self.len == 0
     }
 
-
     ///Creates `Bytes` instance from slice, by copying it.
     pub fn copy_from_slice(data: &[u8]) -> Self {
         data.to_vec().into()
@@ -238,7 +236,6 @@ impl Bytes {
             return Bytes::new();
         }
 
-
         let mut ret = self.clone();
 
         ret.len = end - begin;
@@ -394,7 +391,6 @@ impl Bytes {
             return Bytes::new();
         }
 
-
         let mut ret = self.clone();
 
         unsafe { self.inc_start(at) };
@@ -429,8 +425,9 @@ impl Bytes {
             // The Vec "promotable" vtables do not store the capacity,
             // so we cannot truncate while using this repr. We *have* to
             // promote using `split_off` so the capacity can be stored.
-            if self.vtable as *const Vtable == &PROMOTABLE_EVEN_VTABLE ||
+            if self.vtable as *const Vtable == &PROMOTABLE_EVEN_VTABLE
-                self.vtable as *const Vtable == &PROMOTABLE_ODD_VTABLE {
+                || self.vtable as *const Vtable == &PROMOTABLE_ODD_VTABLE
+            {
                 drop(self.split_off(len));
             } else {
                 self.len = len;
@@ -455,7 +452,12 @@ impl Bytes {
     }
 
     #[inline]
-    pub(crate) unsafe fn with_vtable(ptr: *const u8, len: usize, data: AtomicPtr<()>, vtable: &'static Vtable) -> Bytes {
+    pub(crate) unsafe fn with_vtable(
+        ptr: *const u8,
+        len: usize,
+        data: AtomicPtr<()>,
+        vtable: &'static Vtable,
+    ) -> Bytes {
         Bytes {
             ptr,
             len,
@@ -468,9 +470,7 @@ impl Bytes {
 
     #[inline]
     fn as_slice(&self) -> &[u8] {
-        unsafe {
+        unsafe { slice::from_raw_parts(self.ptr, self.len) }
-            slice::from_raw_parts(self.ptr, self.len)
-        }
     }
 
     #[inline]
@@ -489,18 +489,14 @@ unsafe impl Sync for Bytes {}
 impl Drop for Bytes {
     #[inline]
     fn drop(&mut self) {
-        unsafe {
+        unsafe { (self.vtable.drop)(&mut self.data, self.ptr, self.len) }
-            (self.vtable.drop)(&mut self.data, self.ptr, self.len)
-        }
     }
 }
 
 impl Clone for Bytes {
     #[inline]
     fn clone(&self) -> Bytes {
-        unsafe {
+        unsafe { (self.vtable.clone)(&self.data, self.ptr, self.len) }
-            (self.vtable.clone)(&self.data, self.ptr, self.len)
-        }
     }
 }
 
@@ -551,7 +547,10 @@ impl AsRef<[u8]> for Bytes {
 }
 
 impl hash::Hash for Bytes {
-    fn hash<H>(&self, state: &mut H) where H: hash::Hasher {
+    fn hash<H>(&self, state: &mut H)
+    where
+        H: hash::Hasher,
+    {
         self.as_slice().hash(state);
     }
 }
@@ -729,7 +728,8 @@ impl PartialOrd<Bytes> for &str {
 }
 
 impl<'a, T: ?Sized> PartialEq<&'a T> for Bytes
-    where Bytes: PartialEq<T>
+where
+    Bytes: PartialEq<T>,
 {
     fn eq(&self, other: &&'a T) -> bool {
         *self == **other
@@ -737,7 +737,8 @@ impl<'a, T: ?Sized> PartialEq<&'a T> for Bytes
 }
 
 impl<'a, T: ?Sized> PartialOrd<&'a T> for Bytes
-    where Bytes: PartialOrd<T>
+where
+    Bytes: PartialOrd<T>,
 {
     fn partial_cmp(&self, other: &&'a T) -> Option<cmp::Ordering> {
         self.partial_cmp(&**other)
@@ -953,7 +954,13 @@ unsafe fn shallow_clone_arc(shared: *mut Shared, ptr: *const u8, len: usize) ->
 }
 
 #[cold]
-unsafe fn shallow_clone_vec(atom: &AtomicPtr<()>, ptr: *const (), buf: *mut u8, offset: *const u8, len: usize) -> Bytes {
+unsafe fn shallow_clone_vec(
+    atom: &AtomicPtr<()>,
+    ptr: *const (),
+    buf: *mut u8,
+    offset: *const u8,
+    len: usize,
+) -> Bytes {
     // If  the buffer is still tracked in a `Vec<u8>`. It is time to
     // promote the vec to an `Arc`. This could potentially be called
     // concurrently, so some care must be taken.

src/bytes_mut.rs

@@ -1,18 +1,22 @@
-use core::{cmp, fmt, hash, isize, slice, usize};
+use core::iter::{FromIterator, Iterator};
 use core::mem::{self, ManuallyDrop};
 use core::ops::{Deref, DerefMut};
 use core::ptr::{self, NonNull};
-use core::iter::{FromIterator, Iterator};
+use core::{cmp, fmt, hash, isize, slice, usize};
 
-use alloc::{vec::Vec, string::String, boxed::Box, borrow::{Borrow, BorrowMut}};
+use alloc::{
+    borrow::{Borrow, BorrowMut},
+    boxed::Box,
+    string::String,
+    vec::Vec,
+};
 
-use crate::{Bytes, Buf, BufMut};
-use crate::bytes::Vtable;
 use crate::buf::IntoIter;
-use crate::loom::sync::atomic::{self, AtomicPtr, AtomicUsize, Ordering};
+use crate::bytes::Vtable;
 #[allow(unused)]
 use crate::loom::sync::atomic::AtomicMut;
-
+use crate::loom::sync::atomic::{self, AtomicPtr, AtomicUsize, Ordering};
+use crate::{Buf, BufMut, Bytes};
 
 /// A unique reference to a contiguous slice of memory.
 ///
@@ -247,9 +251,7 @@ impl BytesMut {
             let len = self.len;
             let data = AtomicPtr::new(self.data as _);
             mem::forget(self);
-            unsafe {
+            unsafe { Bytes::with_vtable(ptr, len, data, &SHARED_VTABLE) }
-                Bytes::with_vtable(ptr, len, data, &SHARED_VTABLE)
-            }
         }
     }
 
@@ -391,7 +393,9 @@ impl BytesMut {
     /// [`split_off`]: #method.split_off
     pub fn truncate(&mut self, len: usize) {
         if len <= self.len() {
-            unsafe { self.set_len(len); }
+            unsafe {
+                self.set_len(len);
+            }
         }
     }
 
@@ -572,7 +576,8 @@ impl BytesMut {
                     self.cap += off;
                 } else {
                     // No space - allocate more
-                    let mut v = ManuallyDrop::new(rebuild_vec(self.ptr.as_ptr(), self.len, self.cap, off));
+                    let mut v =
+                        ManuallyDrop::new(rebuild_vec(self.ptr.as_ptr(), self.len, self.cap, off));
                     v.reserve(additional);
 
                     // Update the info
@@ -588,7 +593,6 @@ impl BytesMut {
         debug_assert_eq!(kind, KIND_ARC);
         let shared: *mut Shared = self.data as _;
 
-
         // Reserving involves abandoning the currently shared buffer and
         // allocating a new vector with the requested capacity.
         //
@@ -632,9 +636,7 @@ impl BytesMut {
                 // check.
                 let double = v.capacity().checked_shl(1).unwrap_or(new_cap);
 
-                new_cap = cmp::max(
+                new_cap = cmp::max(cmp::max(double, new_cap), original_capacity);
-                    cmp::max(double, new_cap),
-                    original_capacity);
             } else {
                 new_cap = cmp::max(new_cap, original_capacity);
             }
@@ -683,14 +685,12 @@ impl BytesMut {
             // Reserved above
             debug_assert!(dst.len() >= cnt);
 
-            ptr::copy_nonoverlapping(
+            ptr::copy_nonoverlapping(extend.as_ptr(), dst.as_mut_ptr() as *mut u8, cnt);
-                extend.as_ptr(),
-                dst.as_mut_ptr() as *mut u8,
-                cnt);
-
         }
 
-        unsafe { self.advance_mut(cnt); }
+        unsafe {
+            self.advance_mut(cnt);
+        }
     }
 
     /// Absorbs a `BytesMut` that was previously split off.
@@ -755,16 +755,12 @@ impl BytesMut {
 
     #[inline]
     fn as_slice(&self) -> &[u8] {
-        unsafe {
+        unsafe { slice::from_raw_parts(self.ptr.as_ptr(), self.len) }
-            slice::from_raw_parts(self.ptr.as_ptr(), self.len)
-        }
     }
 
     #[inline]
     fn as_slice_mut(&mut self) -> &mut [u8] {
-        unsafe {
+        unsafe { slice::from_raw_parts_mut(self.ptr.as_ptr(), self.len) }
-            slice::from_raw_parts_mut(self.ptr.as_ptr(), self.len)
-        }
     }
 
     unsafe fn set_start(&mut self, start: usize) {
@@ -793,7 +789,7 @@ impl BytesMut {
                 // on 64 bit systems and will only happen on 32 bit systems
                 // when shifting past 134,217,727 bytes. As such, we don't
                 // worry too much about performance here.
-                self.promote_to_shared(/*ref_count = */1);
+                self.promote_to_shared(/*ref_count = */ 1);
             }
         }
 
@@ -825,10 +821,10 @@ impl BytesMut {
         }
 
         let ptr = unsafe { self.ptr.as_ptr().offset(self.len as isize) };
-        if ptr == other.ptr.as_ptr() &&
+        if ptr == other.ptr.as_ptr()
-           self.kind() == KIND_ARC &&
+            && self.kind() == KIND_ARC
-           other.kind() == KIND_ARC &&
+            && other.kind() == KIND_ARC
-           self.data == other.data
+            && self.data == other.data
         {
             // Contiguous blocks, just combine directly
             self.len += other.len;
@@ -889,7 +885,7 @@ impl BytesMut {
             increment_shared(self.data);
             ptr::read(self)
         } else {
-            self.promote_to_shared(/*ref_count = */2);
+            self.promote_to_shared(/*ref_count = */ 2);
             ptr::read(self)
         }
     }
@@ -957,7 +953,9 @@ impl Buf for BytesMut {
             cnt,
             self.remaining(),
         );
-        unsafe { self.set_start(cnt); }
+        unsafe {
+            self.set_start(cnt);
+        }
     }
 
     fn to_bytes(&mut self) -> crate::Bytes {
@@ -974,7 +972,12 @@ impl BufMut for BytesMut {
     #[inline]
     unsafe fn advance_mut(&mut self, cnt: usize) {
         let new_len = self.len() + cnt;
-        assert!(new_len <= self.cap, "new_len = {}; capacity = {}", new_len, self.cap);
+        assert!(
+            new_len <= self.cap,
+            "new_len = {}; capacity = {}",
+            new_len,
+            self.cap
+        );
         self.len = new_len;
     }
 
@@ -989,7 +992,10 @@ impl BufMut for BytesMut {
     // Specialize these methods so they can skip checking `remaining_mut`
     // and `advance_mut`.
 
-    fn put<T: crate::Buf>(&mut self, mut src: T) where Self: Sized {
+    fn put<T: crate::Buf>(&mut self, mut src: T)
+    where
+        Self: Sized,
+    {
         while src.has_remaining() {
             let s = src.bytes();
             let l = s.len();
@@ -1068,8 +1074,7 @@ impl Ord for BytesMut {
     }
 }
 
-impl Eq for BytesMut {
+impl Eq for BytesMut {}
-}
 
 impl Default for BytesMut {
     #[inline]
@@ -1079,7 +1084,10 @@ impl Default for BytesMut {
 }
 
 impl hash::Hash for BytesMut {
-    fn hash<H>(&self, state: &mut H) where H: hash::Hasher {
+    fn hash<H>(&self, state: &mut H)
+    where
+        H: hash::Hasher,
+    {
         let s: &[u8] = self.as_ref();
         s.hash(state);
     }
@@ -1139,7 +1147,10 @@ impl<'a> IntoIterator for &'a BytesMut {
 }
 
 impl Extend<u8> for BytesMut {
-    fn extend<T>(&mut self, iter: T) where T: IntoIterator<Item = u8> {
+    fn extend<T>(&mut self, iter: T)
+    where
+        T: IntoIterator<Item = u8>,
+    {
         let iter = iter.into_iter();
 
         let (lower, _) = iter.size_hint();
@@ -1156,7 +1167,10 @@ impl Extend<u8> for BytesMut {
 }
 
 impl<'a> Extend<&'a u8> for BytesMut {
-    fn extend<T>(&mut self, iter: T) where T: IntoIterator<Item = &'a u8> {
+    fn extend<T>(&mut self, iter: T)
+    where
+        T: IntoIterator<Item = &'a u8>,
+    {
         self.extend(iter.into_iter().map(|b| *b))
     }
 }
@@ -1234,7 +1248,10 @@ impl Shared {
 
 fn original_capacity_to_repr(cap: usize) -> usize {
     let width = PTR_WIDTH - ((cap >> MIN_ORIGINAL_CAPACITY_WIDTH).leading_zeros() as usize);
-    cmp::min(width, MAX_ORIGINAL_CAPACITY_WIDTH - MIN_ORIGINAL_CAPACITY_WIDTH)
+    cmp::min(
+        width,
+        MAX_ORIGINAL_CAPACITY_WIDTH - MIN_ORIGINAL_CAPACITY_WIDTH,
+    )
 }
 
 fn original_capacity_from_repr(repr: usize) -> usize {
@@ -1402,7 +1419,8 @@ impl PartialOrd<BytesMut> for String {
 }
 
 impl<'a, T: ?Sized> PartialEq<&'a T> for BytesMut
-    where BytesMut: PartialEq<T>
+where
+    BytesMut: PartialEq<T>,
 {
     fn eq(&self, other: &&'a T) -> bool {
         *self == **other
@@ -1410,7 +1428,8 @@ impl<'a, T: ?Sized> PartialEq<&'a T> for BytesMut
 }
 
 impl<'a, T: ?Sized> PartialOrd<&'a T> for BytesMut
-    where BytesMut: PartialOrd<T>
+where
+    BytesMut: PartialOrd<T>,
 {
     fn partial_cmp(&self, other: &&'a T) -> Option<cmp::Ordering> {
         self.partial_cmp(*other)
@@ -1528,8 +1547,8 @@ mod fuzz {
     use loom::sync::Arc;
     use loom::thread;
 
-    use crate::Bytes;
     use super::BytesMut;
+    use crate::Bytes;
 
     #[test]
     fn bytes_mut_cloning_frozen() {

src/fmt/debug.rs

@@ -1,7 +1,7 @@
 use core::fmt::{Debug, Formatter, Result};
 
-use crate::{Bytes, BytesMut};
 use super::BytesRef;
+use crate::{Bytes, BytesMut};
 
 /// Alternative implementation of `std::fmt::Debug` for byte slice.
 ///

src/fmt/hex.rs

@@ -1,7 +1,7 @@
 use core::fmt::{Formatter, LowerHex, Result, UpperHex};
 
-use crate::{Bytes, BytesMut};
 use super::BytesRef;
+use crate::{Bytes, BytesMut};
 
 impl LowerHex for BytesRef<'_> {
     fn fmt(&self, f: &mut Formatter<'_>) -> Result {

src/lib.rs

@@ -1,4 +1,9 @@
-#![deny(warnings, missing_docs, missing_debug_implementations, rust_2018_idioms)]
+#![deny(
+    warnings,
+    missing_docs,
+    missing_debug_implementations,
+    rust_2018_idioms
+)]
 #![doc(html_root_url = "https://docs.rs/bytes/0.5.4")]
 #![no_std]
 
@@ -72,24 +77,20 @@
 //! perform a syscall, which has the potential of failing. Operations on `Buf`
 //! and `BufMut` are infallible.
 
-
 extern crate alloc;
 
 #[cfg(feature = "std")]
 extern crate std;
 
 pub mod buf;
-pub use crate::buf::{
+pub use crate::buf::{Buf, BufMut};
-    Buf,
-    BufMut,
-};
 
-mod bytes_mut;
 mod bytes;
+mod bytes_mut;
 mod fmt;
 mod loom;
-pub use crate::bytes_mut::BytesMut;
 pub use crate::bytes::Bytes;
+pub use crate::bytes_mut::BytesMut;
 
 // Optional Serde support
 #[cfg(feature = "serde")]

src/serde.rs

@@ -1,15 +1,16 @@
+use super::{Bytes, BytesMut};
 use alloc::string::String;
 use alloc::vec::Vec;
 use core::{cmp, fmt};
-use serde::{Serialize, Serializer, Deserialize, Deserializer, de};
+use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
-use super::{Bytes, BytesMut};
 
 macro_rules! serde_impl {
-    ($ty:ident, $visitor_ty:ident, $from_slice:ident, $from_vec:ident) => (
+    ($ty:ident, $visitor_ty:ident, $from_slice:ident, $from_vec:ident) => {
         impl Serialize for $ty {
             #[inline]
             fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-                where S: Serializer
+            where
+                S: Serializer,
             {
                 serializer.serialize_bytes(&self)
             }
@@ -26,7 +27,8 @@ macro_rules! serde_impl {
 
             #[inline]
             fn visit_seq<V>(self, mut seq: V) -> Result<Self::Value, V::Error>
-                where V: de::SeqAccess<'de>
+            where
+                V: de::SeqAccess<'de>,
             {
                 let len = cmp::min(seq.size_hint().unwrap_or(0), 4096);
                 let mut values: Vec<u8> = Vec::with_capacity(len);
@@ -40,28 +42,32 @@ macro_rules! serde_impl {
 
             #[inline]
             fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
-                where E: de::Error
+            where
+                E: de::Error,
             {
                 Ok($ty::$from_slice(v))
             }
 
             #[inline]
             fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E>
-                where E: de::Error
+            where
+                E: de::Error,
             {
                 Ok($ty::$from_vec(v))
             }
 
             #[inline]
             fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
-                where E: de::Error
+            where
+                E: de::Error,
             {
                 Ok($ty::$from_slice(v.as_bytes()))
             }
 
             #[inline]
             fn visit_string<E>(self, v: String) -> Result<Self::Value, E>
-                where E: de::Error
+            where
+                E: de::Error,
             {
                 Ok($ty::$from_vec(v.into_bytes()))
             }
@@ -70,12 +76,13 @@ macro_rules! serde_impl {
         impl<'de> Deserialize<'de> for $ty {
             #[inline]
             fn deserialize<D>(deserializer: D) -> Result<$ty, D::Error>
-                where D: Deserializer<'de>
+            where
+                D: Deserializer<'de>,
             {
                 deserializer.deserialize_byte_buf($visitor_ty)
             }
         }
-    );
+    };
 }
 
 serde_impl!(Bytes, BytesVisitor, copy_from_slice, from);

tests/test_buf_mut.rs

@@ -1,10 +1,10 @@
 #![deny(warnings, rust_2018_idioms)]
 
-use bytes::{BufMut, BytesMut};
 #[cfg(feature = "std")]
 use bytes::buf::IoSliceMut;
-use core::usize;
+use bytes::{BufMut, BytesMut};
 use core::fmt::Write;
+use core::usize;
 
 #[test]
 fn test_vec_as_mut_buf() {

tests/test_bytes.rs

@@ -1,6 +1,6 @@
 #![deny(warnings, rust_2018_idioms)]
 
-use bytes::{Bytes, BytesMut, Buf, BufMut};
+use bytes::{Buf, BufMut, Bytes, BytesMut};
 
 use std::usize;
 
@@ -44,7 +44,6 @@ fn test_layout() {
         mem::size_of::<Option<BytesMut>>(),
         "BytesMut should be same size as Option<BytesMut>",
     );
-
 }
 
 #[test]
@@ -87,13 +86,11 @@ fn fmt_write() {
     write!(a, "{}", &s[..64]).unwrap();
     assert_eq!(a, s[..64].as_bytes());
 
-
     let mut b = BytesMut::with_capacity(64);
     write!(b, "{}", &s[..32]).unwrap();
     write!(b, "{}", &s[32..64]).unwrap();
     assert_eq!(b, s[..64].as_bytes());
 
-
     let mut c = BytesMut::with_capacity(64);
     write!(c, "{}", s).unwrap();
     assert_eq!(c, s[..].as_bytes());
@@ -305,11 +302,13 @@ fn split_off_to_at_gt_len() {
 
     assert!(panic::catch_unwind(move || {
         let _ = make_bytes().split_to(5);
-    }).is_err());
+    })
+    .is_err());
 
     assert!(panic::catch_unwind(move || {
         let _ = make_bytes().split_off(5);
-    }).is_err());
+    })
+    .is_err());
 }
 
 #[test]
@@ -864,7 +863,6 @@ fn slice_ref_works() {
     test_slice_ref(&bytes, 9, 9, b"");
 }
 
-
 #[test]
 fn slice_ref_empty() {
     let bytes = Bytes::from(&b""[..]);

tests/test_bytes_vec_alloc.rs

@@ -39,7 +39,11 @@ unsafe impl GlobalAlloc for Ledger {
             let off_ptr = (ptr as *mut usize).offset(-1);
             let orig_size = off_ptr.read();
             if orig_size != layout.size() {
-                panic!("bad dealloc: alloc size was {}, dealloc size is {}", orig_size, layout.size());
+                panic!(
+                    "bad dealloc: alloc size was {}, dealloc size is {}",
+                    orig_size,
+                    layout.size()
+                );
             }
 
             let new_layout = match Layout::from_size_align(layout.size() + USIZE_SIZE, 1) {

tests/test_chain.rs

@@ -1,7 +1,7 @@
 #![deny(warnings, rust_2018_idioms)]
 
-use bytes::{Buf, BufMut, Bytes};
 use bytes::buf::{BufExt, BufMutExt};
+use bytes::{Buf, BufMut, Bytes};
 #[cfg(feature = "std")]
 use std::io::IoSlice;
 

tests/test_iter.rs

@@ -11,7 +11,6 @@ fn iter_len() {
     assert_eq!(iter.len(), 11);
 }
 
-
 #[test]
 fn empty_iter_len() {
     let buf = Bytes::from_static(b"");

tests/test_reader.rs

@@ -3,7 +3,7 @@
 
 use std::io::{BufRead, Read};
 
-use bytes::buf::{BufExt};
+use bytes::buf::BufExt;
 
 #[test]
 fn read() {

tests/test_serde.rs

@@ -1,7 +1,7 @@
 #![cfg(feature = "serde")]
 #![deny(warnings, rust_2018_idioms)]
 
-use serde_test::{Token, assert_tokens};
+use serde_test::{assert_tokens, Token};
 
 #[test]
 fn test_ser_de_empty() {