Clippy fixes

src/core/body.rs

@@ -11,7 +11,7 @@
 
 use crate::{AttachmentIterator, BodyPartIterator, Message, MessagePart, MessagePartId, PartType};
 
-impl<'x> PartType<'x> {
+impl PartType<'_> {
     #[allow(clippy::len_without_is_empty)]
     pub fn len(&self) -> usize {
         match self {

src/core/header.rs

@@ -259,7 +259,7 @@ impl PartialEq for HeaderName<'_> {
     }
 }
 
-impl<'x> Hash for HeaderName<'x> {
+impl Hash for HeaderName<'_> {
     fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
         match self {
             HeaderName::Other(value) => {
@@ -280,7 +280,7 @@ impl<'x> From<HeaderName<'x>> for u8 {
     }
 }
 
-impl<'x> HeaderName<'x> {
+impl HeaderName<'_> {
     pub fn to_owned(&self) -> HeaderName<'static> {
         match self {
             HeaderName::Other(name) => HeaderName::Other(name.to_string().into()),
@@ -712,7 +712,7 @@ impl<'x> MessagePart<'x> {
     }
 }
 
-impl<'x> fmt::Display for MessagePart<'x> {
+impl fmt::Display for MessagePart<'_> {
     fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt.write_str(self.text_contents().unwrap_or("[no contents]"))
     }
@@ -911,7 +911,7 @@ impl<'x> Received<'x> {
 }
 
 /// A hostname or IP address.
-impl<'x> Host<'x> {
+impl Host<'_> {
     pub fn into_owned(self) -> Host<'static> {
         match self {
             Host::Name(name) => Host::Name(name.into_owned().into()),
@@ -946,7 +946,7 @@ impl<'x> From<Cow<'x, str>> for HeaderName<'x> {
     }
 }
 
-impl<'x> From<String> for HeaderName<'x> {
+impl From<String> for HeaderName<'_> {
     fn from(value: String) -> Self {
         HeaderName::parse(value).unwrap_or(HeaderName::Other("".into()))
     }

src/decoders/encoded_word.rs

@@ -20,7 +20,7 @@ enum Rfc2047State {
     Data,
 }
 
-impl<'x> MessageStream<'x> {
+impl MessageStream<'_> {
     pub fn decode_rfc2047(&mut self) -> Option<String> {
         let mut state = Rfc2047State::Init;
 

src/lib.rs

@@ -359,7 +359,7 @@ pub enum PartType<'x> {
     Multipart(Vec<MessagePartId>),
 }
 
-impl<'x> Default for PartType<'x> {
+impl Default for PartType<'_> {
     fn default() -> Self {
         PartType::Multipart(Vec::with_capacity(0))
     }

src/parsers/fields/received.rs

@@ -365,7 +365,7 @@ impl<'x> MessageStream<'x> {
     }
 }
 
-impl<'x, 'y> Iterator for Tokenizer<'x, 'y> {
+impl<'x> Iterator for Tokenizer<'x, '_> {
     type Item = TokenData<'x>;
 
     fn next(&mut self) -> Option<Self::Item> {
@@ -789,7 +789,7 @@ impl<'x, 'y> Tokenizer<'x, 'y> {
     }
 }
 
-impl<'x> From<Token> for TokenData<'x> {
+impl From<Token> for TokenData<'_> {
     fn from(token: Token) -> Self {
         Self {
             token,