Fix clippy

Author: DoumanAsh

src/windows/dcb.rs

@@ -11,9 +11,9 @@ pub(crate) fn get_dcb(handle: HANDLE) -> Result<DCB> {
     dcb.DCBlength = std::mem::size_of::<DCB>() as u32;
 
     if unsafe { GetCommState(handle, &mut dcb) } != 0 {
-        return Ok(dcb);
+        Ok(dcb)
     } else {
-        return Err(super::error::last_os_error());
+        Err(super::error::last_os_error())
     }
 }
 
@@ -57,9 +57,9 @@ pub(crate) fn init(dcb: &mut DCB) {
 
 pub(crate) fn set_dcb(handle: HANDLE, mut dcb: DCB) -> Result<()> {
     if unsafe { SetCommState(handle, &mut dcb as *mut _) != 0 } {
-        return Ok(());
+        Ok(())
     } else {
-        return Err(super::error::last_os_error());
+        Err(super::error::last_os_error())
     }
 }
 

src/windows/enumerate.rs

@@ -29,8 +29,7 @@ fn get_ports_guids() -> Result<Vec<GUID>> {
 
     // Size vector to hold 1 result (which is the most common result).
     let mut num_guids: DWORD = 0;
-    let mut guids: Vec<GUID> = Vec::new();
-    guids.push(GUID_NULL); // Placeholder for first result
+    let mut guids = vec![GUID_NULL]; // Placeholder for first result
 
     // Find out how many GUIDs are associated with "Ports". Initially we assume
     // that there is only 1. num_guids will tell us how many there actually are.
@@ -272,10 +271,8 @@ impl PortDevice {
                 ptr::null_mut(),
             )
         };
-        if res == FALSE {
-            if unsafe { GetLastError() } != ERROR_INSUFFICIENT_BUFFER {
-                return None;
-            }
+        if res == FALSE && unsafe { GetLastError() } != ERROR_INSUFFICIENT_BUFFER {
+            return None;
         }
         let end_of_buffer = result_buf.len() - 1;
         result_buf[end_of_buffer] = 0;
@@ -307,7 +304,7 @@ pub fn available_ports() -> Result<Vec<SerialPortInfo>> {
             }
 
             ports.push(SerialPortInfo {
-                port_name: port_name,
+                port_name,
                 port_type: port_device.port_type(),
             });
         }

src/windows/error.rs

@@ -7,7 +7,7 @@ use winapi::um::errhandlingapi::GetLastError;
 use winapi::um::winbase::{
     FormatMessageW, FORMAT_MESSAGE_FROM_SYSTEM, FORMAT_MESSAGE_IGNORE_INSERTS,
 };
-use winapi::um::winnt::{LANG_SYSTEM_DEFAULT, MAKELANGID, SUBLANG_SYS_DEFAULT, WCHAR};
+use winapi::um::winnt::{LANG_SYSTEM_DEFAULT, MAKELANGID, SUBLANG_SYS_DEFAULT};
 
 use crate::{Error, ErrorKind};
 
@@ -35,7 +35,7 @@ fn error_string(errnum: u32) -> String {
     // MAKELANGID(LANG_SYSTEM_DEFAULT, SUBLANG_SYS_DEFAULT)
     let langId = MAKELANGID(LANG_SYSTEM_DEFAULT, SUBLANG_SYS_DEFAULT) as DWORD;
 
-    let mut buf = [0 as WCHAR; 2048];
+    let mut buf = [0u16; 2048];
 
     unsafe {
         let res = FormatMessageW(