Fix clippy warnings

src/common.rs

@@ -15,10 +15,7 @@ macro_rules! werr {
 }
 
 pub(crate) fn to_utf16<P: AsRef<OsStr>>(s: P) -> Vec<u16> {
-    s.as_ref()
-        .encode_wide()
-        .chain(Some(0).into_iter())
-        .collect()
+    s.as_ref().encode_wide().chain(Some(0)).collect()
 }
 
 pub(crate) fn v16_to_v8(v: &[u16]) -> Vec<u8> {

src/decoder/serialization_serde.rs

@@ -14,7 +14,7 @@ impl Error for DecoderError {
     }
 }
 
-impl<'de, 'a> Deserializer<'de> for &'a mut Decoder {
+impl<'de> Deserializer<'de> for &mut Decoder {
     type Error = DecoderError;
     fn deserialize_any<V>(self, visitor: V) -> DecodeResult<V::Value>
     where

src/encoder/mod.rs

@@ -101,7 +101,7 @@ impl Encoder<&Transaction> {
         key: &RegKey,
         tr: &'a Transaction,
     ) -> EncodeResult<Encoder<&'a Transaction>> {
-        key.open_subkey_transacted_with_flags("", &tr, ENCODER_SAM)
+        key.open_subkey_transacted_with_flags("", tr, ENCODER_SAM)
             .map(|k| Encoder::new_transacted(k, tr))
             .map_err(EncoderError::IoError)
     }

src/encoder/serialization_serde.rs

@@ -458,9 +458,9 @@ impl serde::Serializer for MapKeySerializer {
         Err(EncoderError::KeyMustBeAString)
     }
 
-    fn collect_str<T: ?Sized>(self, value: &T) -> EncodeResult<String>
+    fn collect_str<T>(self, value: &T) -> EncodeResult<String>
     where
-        T: fmt::Display,
+        T: fmt::Display + ?Sized,
     {
         Ok(value.to_string())
     }
@@ -471,7 +471,7 @@ pub struct StructMapEncoder<'a, Tr: AsRef<Transaction>> {
     is_root: bool,
 }
 
-impl<'a, Tr: AsRef<Transaction>> SerializeStruct for StructMapEncoder<'a, Tr> {
+impl<Tr: AsRef<Transaction>> SerializeStruct for StructMapEncoder<'_, Tr> {
     type Ok = ();
     type Error = EncoderError;
 
@@ -492,7 +492,7 @@ impl<'a, Tr: AsRef<Transaction>> SerializeStruct for StructMapEncoder<'a, Tr> {
     }
 }
 
-impl<'a, Tr: AsRef<Transaction>> SerializeMap for StructMapEncoder<'a, Tr> {
+impl<Tr: AsRef<Transaction>> SerializeMap for StructMapEncoder<'_, Tr> {
     type Ok = ();
     type Error = EncoderError;
 

src/reg_key.rs

@@ -670,7 +670,7 @@ impl RegKey {
             match unsafe {
                 winapi_reg::RegQueryValueExW(
                     self.hkey,
-                    c_name.as_ptr() as *const u16,
+                    c_name.as_ptr(),
                     ptr::null_mut(),
                     &mut buf_type,
                     buf.as_mut_ptr() as LPBYTE,
@@ -1020,7 +1020,7 @@ pub struct EnumKeys<'key> {
     index: DWORD,
 }
 
-impl<'key> Iterator for EnumKeys<'key> {
+impl Iterator for EnumKeys<'_> {
     type Item = io::Result<String>;
 
     fn next(&mut self) -> Option<io::Result<String>> {
@@ -1045,7 +1045,7 @@ pub struct EnumValues<'key> {
     index: DWORD,
 }
 
-impl<'key> Iterator for EnumValues<'key> {
+impl Iterator for EnumValues<'_> {
     type Item = io::Result<(String, RegValue)>;
 
     fn next(&mut self) -> Option<io::Result<(String, RegValue)>> {

src/transaction.rs

@@ -37,7 +37,6 @@
 //!    }
 //!}
 //!```
-#![cfg(feature = "transactions")]
 use std::io;
 use std::ptr;
 use winapi::um::handleapi;