Fix clippy warnings

src/bindgen/bitflags.rs

@@ -137,13 +137,13 @@ struct FlagValueFold<'a> {
     out_of_line: bool,
 }
 
-impl<'a> FlagValueFold<'a> {
+impl FlagValueFold<'_> {
     fn is_self(&self, ident: &syn::Ident) -> bool {
         ident == self.struct_name || ident == "Self"
     }
 }
 
-impl<'a> Fold for FlagValueFold<'a> {
+impl Fold for FlagValueFold<'_> {
     fn fold_expr(&mut self, node: syn::Expr) -> syn::Expr {
         // bitflags 2 doesn't expose `bits` publically anymore, and the documented way to
         // combine flags is using the `bits` method, e.g.

src/bindgen/ir/cfg.rs

@@ -15,7 +15,7 @@ enum DefineKey<'a> {
     Named(&'a str, &'a str),
 }
 
-impl<'a> DefineKey<'a> {
+impl DefineKey<'_> {
     fn load(key: &str) -> DefineKey {
         // TODO: dirty parser
         if !key.contains('=') {

src/bindgen/parser.rs

@@ -106,7 +106,7 @@ struct Parser<'a> {
     out: Parse,
 }
 
-impl<'a> Parser<'a> {
+impl Parser<'_> {
     fn should_parse_dependency(&self, pkg_name: &str) -> bool {
         if self.parsed_crates.contains(pkg_name) {
             return false;

src/bindgen/rename.rs

@@ -15,7 +15,7 @@ pub enum IdentifierType<'a> {
     Enum,
 }
 
-impl<'a> IdentifierType<'a> {
+impl IdentifierType<'_> {
     fn to_str(self) -> &'static str {
         match self {
             IdentifierType::StructMember => "m",

src/bindgen/writer.rs

@@ -21,7 +21,7 @@ pub enum ListType<'a> {
 /// A utility wrapper to write unbuffered data and correctly adjust positions.
 struct InnerWriter<'a, 'b: 'a, F: 'a + Write>(&'a mut SourceWriter<'b, F>);
 
-impl<'a, 'b, F: Write> Write for InnerWriter<'a, 'b, F> {
+impl<F: Write> Write for InnerWriter<'_, '_, F> {
     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
         let writer = &mut self.0;