Fix miscellaneous Clippy lints

crates/syntax/src/algo.rs

@@ -112,14 +112,14 @@ impl TreeDiff {
     pub fn into_text_edit(&self, builder: &mut TextEditBuilder) {
         let _p = profile::span("into_text_edit");
 
-        for (anchor, to) in self.insertions.iter() {
+        for (anchor, to) in &self.insertions {
             let offset = match anchor {
                 TreeDiffInsertPos::After(it) => it.text_range().end(),
                 TreeDiffInsertPos::AsFirstChild(it) => it.text_range().start(),
             };
             to.iter().for_each(|to| builder.insert(offset, to.to_string()));
         }
-        for (from, to) in self.replacements.iter() {
+        for (from, to) in &self.replacements {
             builder.replace(from.text_range(), to.to_string());
         }
         for text_range in self.deletions.iter().map(SyntaxElement::text_range) {
@@ -217,9 +217,8 @@ pub fn diff(from: &SyntaxNode, to: &SyntaxNode) -> TreeDiff {
                             cov_mark::hit!(diff_insertions);
                             insert = true;
                             break;
-                        } else {
-                            look_ahead_scratch.push(rhs_child);
                         }
+                        look_ahead_scratch.push(rhs_child);
                     }
                     let drain = look_ahead_scratch.drain(..);
                     if insert {

crates/syntax/src/ast/edit_in_place.rs

@@ -275,7 +275,7 @@ impl ast::PathSegment {
 
 impl ast::UseTree {
     pub fn remove(&self) {
-        for &dir in [Direction::Next, Direction::Prev].iter() {
+        for dir in [Direction::Next, Direction::Prev] {
             if let Some(next_use_tree) = neighbor(self, dir) {
                 let separators = self
                     .syntax()

crates/syntax/src/ast/node_ext.rs

@@ -276,9 +276,9 @@ impl ast::Path {
 
 impl ast::Use {
     pub fn is_simple_glob(&self) -> bool {
-        self.use_tree()
-            .map(|use_tree| use_tree.use_tree_list().is_none() && use_tree.star_token().is_some())
-            .unwrap_or(false)
+        self.use_tree().map_or(false, |use_tree| {
+            use_tree.use_tree_list().is_none() && use_tree.star_token().is_some()
+        })
     }
 }
 

crates/syntax/src/ast/token_ext.rs

@@ -688,7 +688,7 @@ impl Radix {
     pub const ALL: &'static [Radix] =
         &[Radix::Binary, Radix::Octal, Radix::Decimal, Radix::Hexadecimal];
 
-    const fn prefix_len(&self) -> usize {
+    const fn prefix_len(self) -> usize {
         match self {
             Self::Decimal => 0,
             _ => 2,

crates/syntax/src/parsing/text_token_source.rs

@@ -44,8 +44,7 @@ impl<'t> TokenSource for TextTokenSource<'t> {
     fn is_keyword(&self, kw: &str) -> bool {
         self.token_offset_pairs
             .get(self.curr.1)
-            .map(|(token, offset)| &self.text[TextRange::at(*offset, token.len)] == kw)
-            .unwrap_or(false)
+            .map_or(false, |(token, offset)| &self.text[TextRange::at(*offset, token.len)] == kw)
     }
 }
 
@@ -55,8 +54,7 @@ fn mk_token(pos: usize, token_offset_pairs: &[(Token, TextSize)]) -> parser::Tok
             token.kind,
             token_offset_pairs
                 .get(pos + 1)
-                .map(|(_, next_offset)| offset + token.len == *next_offset)
-                .unwrap_or(false),
+                .map_or(false, |(_, next_offset)| offset + token.len == *next_offset),
         ),
         None => (EOF, false),
     };

crates/syntax/src/tests/sourcegen_ast.rs

@@ -215,7 +215,7 @@ fn generate_nodes(kinds: KindsSrc<'_>, grammar: &AstSrc) -> String {
         .flat_map(|node| node.traits.iter().map(move |t| (t, node)))
         .into_group_map()
         .into_iter()
-        .sorted_by_key(|(k, _)| k.clone())
+        .sorted_by_key(|(k, _)| *k)
         .map(|(trait_name, nodes)| {
             let name = format_ident!("Any{}", trait_name);
             let trait_name = format_ident!("{}", trait_name);
@@ -558,12 +558,13 @@ impl Field {
 }
 
 fn lower(grammar: &Grammar) -> AstSrc {
-    let mut res = AstSrc::default();
-
-    res.tokens = "Whitespace Comment String ByteString IntNumber FloatNumber"
-        .split_ascii_whitespace()
-        .map(|it| it.to_string())
-        .collect::<Vec<_>>();
+    let mut res = AstSrc {
+        tokens: "Whitespace Comment String ByteString IntNumber FloatNumber"
+            .split_ascii_whitespace()
+            .map(|it| it.to_string())
+            .collect::<Vec<_>>(),
+        ..Default::default()
+    };
 
     let nodes = grammar.iter().collect::<Vec<_>>();