prefer default over new

crates/hir-def/src/dyn_map.rs

@@ -112,6 +112,10 @@ pub struct Key<K, V, P = (K, V)> {
 }
 
 impl<K, V, P> Key<K, V, P> {
+    #[allow(
+        clippy::new_without_default,
+        reason = "this a const fn, so it can't be default yet. See <https://github.com/rust-lang/rust/issues/63065>"
+    )]
     pub(crate) const fn new() -> Key<K, V, P> {
         Key { _phantom: PhantomData }
     }
@@ -148,16 +152,11 @@ impl<K: Hash + Eq + 'static, V: 'static> Policy for (K, V) {
     }
 }
 
+#[derive(Default)]
 pub struct DynMap {
     pub(crate) map: Map,
 }
 
-impl Default for DynMap {
-    fn default() -> Self {
-        DynMap { map: Map::new() }
-    }
-}
-
 #[repr(transparent)]
 pub struct KeyMap<KEY> {
     map: DynMap,

crates/hir-def/src/expr_store/lower.rs

@@ -2053,7 +2053,7 @@ impl ExprCollector<'_> {
         f: ast::FormatArgsExpr,
         syntax_ptr: AstPtr<ast::Expr>,
     ) -> ExprId {
-        let mut args = FormatArgumentsCollector::new();
+        let mut args = FormatArgumentsCollector::default();
         f.args().for_each(|arg| {
             args.add(FormatArgument {
                 kind: match arg.name() {

crates/hir-def/src/hir/format_args.rs

@@ -460,10 +460,6 @@ impl FormatArgumentsCollector {
         }
     }
 
-    pub fn new() -> Self {
-        Default::default()
-    }
-
     pub fn add(&mut self, arg: FormatArgument) -> usize {
         let index = self.arguments.len();
         if let Some(name) = arg.kind.ident() {