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-rw-r--r--crates/hir/src/semantics.rs2
-rw-r--r--crates/hir/src/source_analyzer.rs2
-rw-r--r--crates/hir_def/src/attr.rs2
-rw-r--r--crates/hir_def/src/generics.rs2
-rw-r--r--crates/hir_def/src/item_tree/pretty.rs4
-rw-r--r--crates/hir_def/src/macro_expansion_tests.rs4
-rw-r--r--crates/hir_def/src/type_ref.rs2
-rw-r--r--crates/hir_expand/src/db.rs6
-rw-r--r--crates/hir_expand/src/eager.rs2
-rw-r--r--crates/hir_ty/src/consteval.rs2
-rw-r--r--crates/hir_ty/src/method_resolution.rs8
-rw-r--r--crates/ide/src/hover.rs2
-rw-r--r--crates/ide/src/hover/render.rs2
-rw-r--r--crates/ide_assists/src/handlers/add_missing_match_arms.rs2
-rw-r--r--crates/ide_assists/src/handlers/extract_function.rs2
-rw-r--r--crates/ide_assists/src/handlers/extract_module.rs20
-rw-r--r--crates/ide_assists/src/handlers/extract_variable.rs2
-rw-r--r--crates/ide_assists/src/handlers/generate_documentation_template.rs6
-rw-r--r--crates/ide_assists/src/handlers/inline_call.rs8
-rw-r--r--crates/ide_assists/src/handlers/merge_match_arms.rs6
-rw-r--r--crates/ide_assists/src/handlers/qualify_method_call.rs2
-rw-r--r--crates/ide_assists/src/utils/gen_trait_fn_body.rs6
-rw-r--r--crates/ide_completion/src/completions/attribute/cfg.rs2
-rw-r--r--crates/ide_completion/src/completions/fn_param.rs4
-rw-r--r--crates/ide_completion/src/completions/postfix.rs4
-rw-r--r--crates/ide_completion/src/completions/qualified_path.rs2
-rw-r--r--crates/ide_completion/src/completions/snippet.rs2
-rw-r--r--crates/ide_db/src/defs.rs4
-rw-r--r--crates/ide_db/src/imports/merge_imports.rs4
-rw-r--r--crates/ide_db/src/syntax_helpers/insert_whitespace_into_node.rs2
-rw-r--r--crates/ide_db/src/tests/sourcegen_lints.rs10
-rw-r--r--crates/mbe/src/syntax_bridge.rs8
-rw-r--r--crates/proc_macro_api/src/msg.rs7
-rw-r--r--crates/proc_macro_srv/src/dylib.rs2
-rw-r--r--crates/rust-analyzer/src/diagnostics/to_proto.rs4
-rw-r--r--crates/rust-analyzer/src/dispatch.rs2
36 files changed, 74 insertions, 77 deletions
diff --git a/crates/hir/src/semantics.rs b/crates/hir/src/semantics.rs
index 45544559eab..236487d8e52 100644
--- a/crates/hir/src/semantics.rs
+++ b/crates/hir/src/semantics.rs
@@ -398,7 +398,7 @@ impl<'db, DB: HirDatabase> Semantics<'db, DB> {
     }
 
     pub fn scope_at_offset(&self, node: &SyntaxNode, offset: TextSize) -> SemanticsScope<'db> {
-        self.imp.scope_at_offset(&node, offset)
+        self.imp.scope_at_offset(node, offset)
     }
 
     pub fn scope_for_def(&self, def: Trait) -> SemanticsScope<'db> {
diff --git a/crates/hir/src/source_analyzer.rs b/crates/hir/src/source_analyzer.rs
index 1789fc319a3..499817b6b8a 100644
--- a/crates/hir/src/source_analyzer.rs
+++ b/crates/hir/src/source_analyzer.rs
@@ -603,7 +603,7 @@ fn resolve_hir_path_(
         // within the trait's associated types.
         if let (Some(unresolved), &TypeNs::TraitId(trait_id)) = (&unresolved, &ty) {
             if let Some(type_alias_id) =
-                db.trait_data(trait_id).associated_type_by_name(&unresolved.name)
+                db.trait_data(trait_id).associated_type_by_name(unresolved.name)
             {
                 return Some(PathResolution::Def(ModuleDefId::from(type_alias_id).into()));
             }
diff --git a/crates/hir_def/src/attr.rs b/crates/hir_def/src/attr.rs
index d0801825543..81054f83b0e 100644
--- a/crates/hir_def/src/attr.rs
+++ b/crates/hir_def/src/attr.rs
@@ -667,7 +667,7 @@ impl DocsRangeMap {
         let InFile { file_id, value: source } = self.source_map.source_of_id(idx);
         match source {
             Either::Left(attr) => {
-                let string = get_doc_string_in_attr(&attr)?;
+                let string = get_doc_string_in_attr(attr)?;
                 let text_range = string.open_quote_text_range()?;
                 let range = TextRange::at(
                     text_range.end() + original_line_src_range.start() + relative_range.start(),
diff --git a/crates/hir_def/src/generics.rs b/crates/hir_def/src/generics.rs
index 60d79f1473e..6d7b98f3b16 100644
--- a/crates/hir_def/src/generics.rs
+++ b/crates/hir_def/src/generics.rs
@@ -72,7 +72,7 @@ impl TypeOrConstParamData {
 
     pub fn type_param(&self) -> Option<&TypeParamData> {
         match self {
-            TypeOrConstParamData::TypeParamData(x) => Some(&x),
+            TypeOrConstParamData::TypeParamData(x) => Some(x),
             TypeOrConstParamData::ConstParamData(_) => None,
         }
     }
diff --git a/crates/hir_def/src/item_tree/pretty.rs b/crates/hir_def/src/item_tree/pretty.rs
index ca164148a1d..34bea5bd459 100644
--- a/crates/hir_def/src/item_tree/pretty.rs
+++ b/crates/hir_def/src/item_tree/pretty.rs
@@ -500,7 +500,7 @@ impl<'a> Printer<'a> {
                     if i != 0 {
                         w!(self, ", ");
                     }
-                    self.print_type_ref(&typeref);
+                    self.print_type_ref(typeref);
                 }
                 if *varargs {
                     if !args.is_empty() {
@@ -509,7 +509,7 @@ impl<'a> Printer<'a> {
                     w!(self, "...");
                 }
                 w!(self, ") -> ");
-                self.print_type_ref(&return_type);
+                self.print_type_ref(return_type);
             }
             TypeRef::Macro(_ast_id) => {
                 w!(self, "<macro>");
diff --git a/crates/hir_def/src/macro_expansion_tests.rs b/crates/hir_def/src/macro_expansion_tests.rs
index 7e0598f4a0f..489a3c67e54 100644
--- a/crates/hir_def/src/macro_expansion_tests.rs
+++ b/crates/hir_def/src/macro_expansion_tests.rs
@@ -191,7 +191,7 @@ pub fn identity_when_valid(_attr: TokenStream, item: TokenStream) -> TokenStream
             if let Some((tree, map, _)) = arg.as_deref() {
                 let tt_range = call.token_tree().unwrap().syntax().text_range();
                 let mut ranges = Vec::new();
-                extract_id_ranges(&mut ranges, &map, &tree);
+                extract_id_ranges(&mut ranges, map, tree);
                 for (range, id) in ranges {
                     let idx = (tt_range.start() + range.end()).into();
                     text_edits.push((idx..idx, format!("#{}", id.0)));
@@ -269,7 +269,7 @@ fn reindent(indent: IndentLevel, pp: String) -> String {
     let mut res = lines.next().unwrap().to_string();
     for line in lines {
         if line.trim().is_empty() {
-            res.push_str(&line)
+            res.push_str(line)
         } else {
             format_to!(res, "{}{}", indent, line)
         }
diff --git a/crates/hir_def/src/type_ref.rs b/crates/hir_def/src/type_ref.rs
index ee8ef6caa30..027c410cdf5 100644
--- a/crates/hir_def/src/type_ref.rs
+++ b/crates/hir_def/src/type_ref.rs
@@ -245,7 +245,7 @@ impl TypeRef {
             f(type_ref);
             match type_ref {
                 TypeRef::Fn(params, _) => {
-                    params.iter().for_each(|(_, param_type)| go(&param_type, f))
+                    params.iter().for_each(|(_, param_type)| go(param_type, f))
                 }
                 TypeRef::Tuple(types) => types.iter().for_each(|t| go(t, f)),
                 TypeRef::RawPtr(type_ref, _)
diff --git a/crates/hir_expand/src/db.rs b/crates/hir_expand/src/db.rs
index 9fe414de264..ac07daa0ab3 100644
--- a/crates/hir_expand/src/db.rs
+++ b/crates/hir_expand/src/db.rs
@@ -149,11 +149,11 @@ pub fn expand_speculative(
     let token_range = token_to_map.text_range();
 
     // Build the subtree and token mapping for the speculative args
-    let censor = censor_for_macro_input(&loc, &speculative_args);
-    let mut fixups = fixup::fixup_syntax(&speculative_args);
+    let censor = censor_for_macro_input(&loc, speculative_args);
+    let mut fixups = fixup::fixup_syntax(speculative_args);
     fixups.replace.extend(censor.into_iter().map(|node| (node, Vec::new())));
     let (mut tt, spec_args_tmap, _) = mbe::syntax_node_to_token_tree_with_modifications(
-        &speculative_args,
+        speculative_args,
         fixups.token_map,
         fixups.next_id,
         fixups.replace,
diff --git a/crates/hir_expand/src/eager.rs b/crates/hir_expand/src/eager.rs
index 1de0d5a77d6..a24c24cfb06 100644
--- a/crates/hir_expand/src/eager.rs
+++ b/crates/hir_expand/src/eager.rs
@@ -207,7 +207,7 @@ fn eager_macro_recur(
 
     // Collect replacement
     for child in children {
-        let def = match child.path().and_then(|path| ModPath::from_src(db, path, &hygiene)) {
+        let def = match child.path().and_then(|path| ModPath::from_src(db, path, hygiene)) {
             Some(path) => macro_resolver(path.clone()).ok_or_else(|| UnresolvedMacro { path })?,
             None => {
                 diagnostic_sink(ExpandError::Other("malformed macro invocation".into()));
diff --git a/crates/hir_ty/src/consteval.rs b/crates/hir_ty/src/consteval.rs
index 68e6e0582e3..0139c5d589d 100644
--- a/crates/hir_ty/src/consteval.rs
+++ b/crates/hir_ty/src/consteval.rs
@@ -293,7 +293,7 @@ pub fn eval_const(expr: &Expr, ctx: &mut ConstEvalCtx<'_>) -> Result<ComputedExp
 
 pub fn eval_usize(expr: Idx<Expr>, mut ctx: ConstEvalCtx<'_>) -> Option<u64> {
     let expr = &ctx.exprs[expr];
-    if let Ok(ce) = eval_const(&expr, &mut ctx) {
+    if let Ok(ce) = eval_const(expr, &mut ctx) {
         match ce {
             ComputedExpr::Literal(Literal::Int(x, _)) => return x.try_into().ok(),
             ComputedExpr::Literal(Literal::Uint(x, _)) => return x.try_into().ok(),
diff --git a/crates/hir_ty/src/method_resolution.rs b/crates/hir_ty/src/method_resolution.rs
index 44ece57a8e0..fdf884a76d3 100644
--- a/crates/hir_ty/src/method_resolution.rs
+++ b/crates/hir_ty/src/method_resolution.rs
@@ -693,7 +693,7 @@ fn iterate_method_candidates_with_autoref(
     iterate_method_candidates_by_receiver(
         receiver_ty,
         first_adjustment.clone(),
-        &rest,
+        rest,
         db,
         env.clone(),
         traits_in_scope,
@@ -973,7 +973,7 @@ fn iterate_inherent_methods(
                 // already happens in `is_valid_candidate` above; if not, we
                 // check it here
                 if receiver_ty.is_none()
-                    && inherent_impl_substs(db, env.clone(), impl_def, &self_ty).is_none()
+                    && inherent_impl_substs(db, env.clone(), impl_def, self_ty).is_none()
                 {
                     cov_mark::hit!(impl_self_type_match_without_receiver);
                     continue;
@@ -1152,7 +1152,7 @@ pub fn implements_trait(
     env: Arc<TraitEnvironment>,
     trait_: TraitId,
 ) -> bool {
-    let goal = generic_implements_goal(db, env.clone(), trait_, &ty);
+    let goal = generic_implements_goal(db, env.clone(), trait_, ty);
     let solution = db.trait_solve(env.krate, goal.cast(Interner));
 
     solution.is_some()
@@ -1164,7 +1164,7 @@ pub fn implements_trait_unique(
     env: Arc<TraitEnvironment>,
     trait_: TraitId,
 ) -> bool {
-    let goal = generic_implements_goal(db, env.clone(), trait_, &ty);
+    let goal = generic_implements_goal(db, env.clone(), trait_, ty);
     let solution = db.trait_solve(env.krate, goal.cast(Interner));
 
     matches!(solution, Some(crate::Solution::Unique(_)))
diff --git a/crates/ide/src/hover.rs b/crates/ide/src/hover.rs
index 4a762ad1f85..ec0435aad06 100644
--- a/crates/ide/src/hover.rs
+++ b/crates/ide/src/hover.rs
@@ -145,7 +145,7 @@ pub(crate) fn hover(
     if result.is_none() {
         // fallbacks, show keywords or types
 
-        let res = descended.iter().find_map(|token| render::keyword(sema, config, &token));
+        let res = descended.iter().find_map(|token| render::keyword(sema, config, token));
         if let Some(res) = res {
             return Some(RangeInfo::new(original_token.text_range(), res));
         }
diff --git a/crates/ide/src/hover/render.rs b/crates/ide/src/hover/render.rs
index 2e141600e80..b2b74ccce32 100644
--- a/crates/ide/src/hover/render.rs
+++ b/crates/ide/src/hover/render.rs
@@ -103,7 +103,7 @@ pub(super) fn try_expr(
 
     let adts = inner_ty.as_adt().zip(body_ty.as_adt());
     if let Some((hir::Adt::Enum(inner), hir::Adt::Enum(body))) = adts {
-        let famous_defs = FamousDefs(sema, sema.scope(&try_expr.syntax()).krate());
+        let famous_defs = FamousDefs(sema, sema.scope(try_expr.syntax()).krate());
         // special case for two options, there is no value in showing them
         if let Some(option_enum) = famous_defs.core_option_Option() {
             if inner == option_enum && body == option_enum {
diff --git a/crates/ide_assists/src/handlers/add_missing_match_arms.rs b/crates/ide_assists/src/handlers/add_missing_match_arms.rs
index 9b6a1ad169f..2070cca142e 100644
--- a/crates/ide_assists/src/handlers/add_missing_match_arms.rs
+++ b/crates/ide_assists/src/handlers/add_missing_match_arms.rs
@@ -41,7 +41,7 @@ pub(crate) fn add_missing_match_arms(acc: &mut Assists, ctx: &AssistContext) ->
     let match_arm_list = match_expr.match_arm_list()?;
     let target_range = ctx.sema.original_range(match_expr.syntax()).range;
 
-    if let None = cursor_at_trivial_match_arm_list(&ctx, &match_expr, &match_arm_list) {
+    if let None = cursor_at_trivial_match_arm_list(ctx, &match_expr, &match_arm_list) {
         let arm_list_range = ctx.sema.original_range(match_arm_list.syntax()).range;
         let cursor_in_range = arm_list_range.contains_range(ctx.selection_trimmed());
         if cursor_in_range {
diff --git a/crates/ide_assists/src/handlers/extract_function.rs b/crates/ide_assists/src/handlers/extract_function.rs
index 5f86957ba2e..4cc4860ed58 100644
--- a/crates/ide_assists/src/handlers/extract_function.rs
+++ b/crates/ide_assists/src/handlers/extract_function.rs
@@ -1448,7 +1448,7 @@ fn make_body(
                 .filter(|it| text_range.contains_range(it.text_range()))
                 .map(|it| match &it {
                     syntax::NodeOrToken::Node(n) => syntax::NodeOrToken::Node(
-                        rewrite_body_segment(ctx, &fun.params, &handler, &n),
+                        rewrite_body_segment(ctx, &fun.params, &handler, n),
                     ),
                     _ => it,
                 })
diff --git a/crates/ide_assists/src/handlers/extract_module.rs b/crates/ide_assists/src/handlers/extract_module.rs
index 9e1481b2f63..d8dda784c55 100644
--- a/crates/ide_assists/src/handlers/extract_module.rs
+++ b/crates/ide_assists/src/handlers/extract_module.rs
@@ -103,7 +103,7 @@ pub(crate) fn extract_module(acc: &mut Assists, ctx: &AssistContext) -> Option<(
     //for change_visibility and usages for first point mentioned above in the process
     let (usages_to_be_processed, record_fields) = module.get_usages_and_record_fields(ctx);
 
-    let import_paths_to_be_removed = module.resolve_imports(curr_parent_module, &ctx);
+    let import_paths_to_be_removed = module.resolve_imports(curr_parent_module, ctx);
     module.body_items = module.change_visibility(record_fields)?;
     if module.body_items.len() == 0 {
         return None;
@@ -203,7 +203,7 @@ pub(crate) fn extract_module(acc: &mut Assists, ctx: &AssistContext) -> Option<(
 
                 builder.delete(node_to_be_removed.text_range());
                 // Remove preceding indentation from node
-                if let Some(range) = indent_range_before_given_node(&node_to_be_removed) {
+                if let Some(range) = indent_range_before_given_node(node_to_be_removed) {
                     builder.delete(range);
                 }
 
@@ -700,7 +700,7 @@ fn does_source_exists_outside_sel_in_same_mod(
             if let Some(ast_module) = &curr_parent_module {
                 if let Some(hir_module) = x.parent(ctx.db()) {
                     have_same_parent =
-                        compare_hir_and_ast_module(&ast_module, hir_module, ctx).is_some();
+                        compare_hir_and_ast_module(ast_module, hir_module, ctx).is_some();
                 } else {
                     let source_file_id = source.file_id.original_file(ctx.db());
                     have_same_parent = source_file_id == curr_file_id;
@@ -725,7 +725,7 @@ fn does_source_exists_outside_sel_in_same_mod(
                 let have_same_parent;
                 if let Some(ast_module) = &curr_parent_module {
                     have_same_parent =
-                        compare_hir_and_ast_module(&ast_module, x.module(ctx.db()), ctx).is_some();
+                        compare_hir_and_ast_module(ast_module, x.module(ctx.db()), ctx).is_some();
                 } else {
                     let source_file_id = source.file_id.original_file(ctx.db());
                     have_same_parent = source_file_id == curr_file_id;
@@ -742,7 +742,7 @@ fn does_source_exists_outside_sel_in_same_mod(
                 let have_same_parent;
                 if let Some(ast_module) = &curr_parent_module {
                     have_same_parent =
-                        compare_hir_and_ast_module(&ast_module, x.module(ctx.db()), ctx).is_some();
+                        compare_hir_and_ast_module(ast_module, x.module(ctx.db()), ctx).is_some();
                 } else {
                     let source_file_id = source.file_id.original_file(ctx.db());
                     have_same_parent = source_file_id == curr_file_id;
@@ -759,7 +759,7 @@ fn does_source_exists_outside_sel_in_same_mod(
                 let have_same_parent;
                 if let Some(ast_module) = &curr_parent_module {
                     have_same_parent =
-                        compare_hir_and_ast_module(&ast_module, x.module(ctx.db()), ctx).is_some();
+                        compare_hir_and_ast_module(ast_module, x.module(ctx.db()), ctx).is_some();
                 } else {
                     let source_file_id = source.file_id.original_file(ctx.db());
                     have_same_parent = source_file_id == curr_file_id;
@@ -776,7 +776,7 @@ fn does_source_exists_outside_sel_in_same_mod(
                 let have_same_parent;
                 if let Some(ast_module) = &curr_parent_module {
                     have_same_parent =
-                        compare_hir_and_ast_module(&ast_module, x.module(ctx.db()), ctx).is_some();
+                        compare_hir_and_ast_module(ast_module, x.module(ctx.db()), ctx).is_some();
                 } else {
                     let source_file_id = source.file_id.original_file(ctx.db());
                     have_same_parent = source_file_id == curr_file_id;
@@ -793,7 +793,7 @@ fn does_source_exists_outside_sel_in_same_mod(
                 let have_same_parent;
                 if let Some(ast_module) = &curr_parent_module {
                     have_same_parent =
-                        compare_hir_and_ast_module(&ast_module, x.module(ctx.db()), ctx).is_some();
+                        compare_hir_and_ast_module(ast_module, x.module(ctx.db()), ctx).is_some();
                 } else {
                     let source_file_id = source.file_id.original_file(ctx.db());
                     have_same_parent = source_file_id == curr_file_id;
@@ -810,7 +810,7 @@ fn does_source_exists_outside_sel_in_same_mod(
                 let have_same_parent;
                 if let Some(ast_module) = &curr_parent_module {
                     have_same_parent =
-                        compare_hir_and_ast_module(&ast_module, x.module(ctx.db()), ctx).is_some();
+                        compare_hir_and_ast_module(ast_module, x.module(ctx.db()), ctx).is_some();
                 } else {
                     let source_file_id = source.file_id.original_file(ctx.db());
                     have_same_parent = source_file_id == curr_file_id;
@@ -827,7 +827,7 @@ fn does_source_exists_outside_sel_in_same_mod(
                 let have_same_parent;
                 if let Some(ast_module) = &curr_parent_module {
                     have_same_parent =
-                        compare_hir_and_ast_module(&ast_module, x.module(ctx.db()), ctx).is_some();
+                        compare_hir_and_ast_module(ast_module, x.module(ctx.db()), ctx).is_some();
                 } else {
                     let source_file_id = source.file_id.original_file(ctx.db());
                     have_same_parent = source_file_id == curr_file_id;
diff --git a/crates/ide_assists/src/handlers/extract_variable.rs b/crates/ide_assists/src/handlers/extract_variable.rs
index aaed2b67fe8..ecf9feb0e55 100644
--- a/crates/ide_assists/src/handlers/extract_variable.rs
+++ b/crates/ide_assists/src/handlers/extract_variable.rs
@@ -52,7 +52,7 @@ pub(crate) fn extract_variable(acc: &mut Assists, ctx: &AssistContext) -> Option
         }
     }
 
-    let reference_modifier = match get_receiver_type(&ctx, &to_extract) {
+    let reference_modifier = match get_receiver_type(ctx, &to_extract) {
         Some(receiver_type) if receiver_type.is_mutable_reference() => "&mut ",
         Some(receiver_type) if receiver_type.is_reference() => "&",
         _ => "",
diff --git a/crates/ide_assists/src/handlers/generate_documentation_template.rs b/crates/ide_assists/src/handlers/generate_documentation_template.rs
index bb7c8b10102..15a07492ec0 100644
--- a/crates/ide_assists/src/handlers/generate_documentation_template.rs
+++ b/crates/ide_assists/src/handlers/generate_documentation_template.rs
@@ -52,7 +52,7 @@ pub(crate) fn generate_documentation_template(
 
     let parent_syntax = ast_func.syntax();
     let text_range = parent_syntax.text_range();
-    let indent_level = IndentLevel::from_node(&parent_syntax);
+    let indent_level = IndentLevel::from_node(parent_syntax);
 
     acc.add(
         AssistId("generate_documentation_template", AssistKind::Generate),
@@ -202,7 +202,7 @@ fn all_parent_mods_public(hir_func: &hir::Function, ctx: &AssistContext) -> bool
 
 /// Returns the name of the current crate
 fn crate_name(ast_func: &ast::Fn, ctx: &AssistContext) -> Option<String> {
-    let krate = ctx.sema.scope(&ast_func.syntax()).module()?.krate();
+    let krate = ctx.sema.scope(ast_func.syntax()).module()?.krate();
     Some(krate.display_name(ctx.db())?.to_string())
 }
 
@@ -338,7 +338,7 @@ fn function_call(
     is_unsafe: bool,
 ) -> Option<String> {
     let name = ast_func.name()?;
-    let arguments = arguments_from_params(&param_list);
+    let arguments = arguments_from_params(param_list);
     let function_call = if param_list.self_param().is_some() {
         format!("{}.{}({})", self_name?, name, arguments)
     } else if let Some(implementation) = self_partial_type(ast_func) {
diff --git a/crates/ide_assists/src/handlers/inline_call.rs b/crates/ide_assists/src/handlers/inline_call.rs
index 5e9f5618061..1bcddeb9ac9 100644
--- a/crates/ide_assists/src/handlers/inline_call.rs
+++ b/crates/ide_assists/src/handlers/inline_call.rs
@@ -305,7 +305,7 @@ fn inline(
     let body = fn_body.clone_for_update();
     let usages_for_locals = |local| {
         Definition::Local(local)
-            .usages(&sema)
+            .usages(sema)
             .all()
             .references
             .remove(&function_def_file_id)
@@ -369,12 +369,12 @@ fn inline(
             // inline single use literals
             [usage] if matches!(expr, ast::Expr::Literal(_)) => {
                 cov_mark::hit!(inline_call_inline_literal);
-                inline_direct(usage, &expr);
+                inline_direct(usage, expr);
             }
             // inline direct local arguments
-            [_, ..] if expr_as_name_ref(&expr).is_some() => {
+            [_, ..] if expr_as_name_ref(expr).is_some() => {
                 cov_mark::hit!(inline_call_inline_locals);
-                usages.into_iter().for_each(|usage| inline_direct(usage, &expr));
+                usages.into_iter().for_each(|usage| inline_direct(usage, expr));
             }
             // can't inline, emit a let statement
             _ => {
diff --git a/crates/ide_assists/src/handlers/merge_match_arms.rs b/crates/ide_assists/src/handlers/merge_match_arms.rs
index 622ead81f10..83d7f0338a8 100644
--- a/crates/ide_assists/src/handlers/merge_match_arms.rs
+++ b/crates/ide_assists/src/handlers/merge_match_arms.rs
@@ -40,7 +40,7 @@ pub(crate) fn merge_match_arms(acc: &mut Assists, ctx: &AssistContext) -> Option
     }
     let current_expr = current_arm.expr()?;
     let current_text_range = current_arm.syntax().text_range();
-    let current_arm_types = get_arm_types(&ctx, &current_arm);
+    let current_arm_types = get_arm_types(ctx, &current_arm);
 
     // We check if the following match arms match this one. We could, but don't,
     // compare to the previous match arm as well.
@@ -99,7 +99,7 @@ fn are_same_types(
     arm: &ast::MatchArm,
     ctx: &AssistContext,
 ) -> bool {
-    let arm_types = get_arm_types(&ctx, &arm);
+    let arm_types = get_arm_types(ctx, arm);
     for (other_arm_type_name, other_arm_type) in arm_types {
         match (current_arm_types.get(&other_arm_type_name), other_arm_type) {
             (Some(Some(current_arm_type)), Some(other_arm_type))
@@ -163,7 +163,7 @@ fn get_arm_types(
         }
     }
 
-    recurse(&mut mapping, &context, &arm.pat());
+    recurse(&mut mapping, context, &arm.pat());
     mapping
 }
 
diff --git a/crates/ide_assists/src/handlers/qualify_method_call.rs b/crates/ide_assists/src/handlers/qualify_method_call.rs
index 61c16aa0445..0f232caab63 100644
--- a/crates/ide_assists/src/handlers/qualify_method_call.rs
+++ b/crates/ide_assists/src/handlers/qualify_method_call.rs
@@ -44,7 +44,7 @@ pub(crate) fn qualify_method_call(acc: &mut Assists, ctx: &AssistContext) -> Opt
     let range = call.syntax().text_range();
     let resolved_call = ctx.sema.resolve_method_call(&call)?;
 
-    let current_module = ctx.sema.scope(&call.syntax()).module()?;
+    let current_module = ctx.sema.scope(call.syntax()).module()?;
     let target_module_def = ModuleDef::from(resolved_call);
     let item_in_ns = ItemInNs::from(target_module_def);
     let receiver_path = current_module
diff --git a/crates/ide_assists/src/utils/gen_trait_fn_body.rs b/crates/ide_assists/src/utils/gen_trait_fn_body.rs
index 908bb136beb..944346b555f 100644
--- a/crates/ide_assists/src/utils/gen_trait_fn_body.rs
+++ b/crates/ide_assists/src/utils/gen_trait_fn_body.rs
@@ -406,7 +406,7 @@ fn gen_partial_eq(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
     }
 
     fn gen_record_pat_field(field_name: &str, pat_name: &str) -> ast::RecordPatField {
-        let pat = make::ext::simple_ident_pat(make::name(&pat_name));
+        let pat = make::ext::simple_ident_pat(make::name(pat_name));
         let name_ref = make::name_ref(field_name);
         make::record_pat_field(name_ref, pat.into())
     }
@@ -455,10 +455,10 @@ fn gen_partial_eq(adt: &ast::Adt, func: &ast::Fn) -> Option<()> {
                             let field_name = field.name()?.to_string();
 
                             let l_name = &format!("l_{}", field_name);
-                            l_fields.push(gen_record_pat_field(&field_name, &l_name));
+                            l_fields.push(gen_record_pat_field(&field_name, l_name));
 
                             let r_name = &format!("r_{}", field_name);
-                            r_fields.push(gen_record_pat_field(&field_name, &r_name));
+                            r_fields.push(gen_record_pat_field(&field_name, r_name));
 
                             let lhs = make::expr_path(make::ext::ident_path(l_name));
                             let rhs = make::expr_path(make::ext::ident_path(r_name));
diff --git a/crates/ide_completion/src/completions/attribute/cfg.rs b/crates/ide_completion/src/completions/attribute/cfg.rs
index e53bf491743..58d0a399496 100644
--- a/crates/ide_completion/src/completions/attribute/cfg.rs
+++ b/crates/ide_completion/src/completions/attribute/cfg.rs
@@ -29,7 +29,7 @@ pub(crate) fn complete_cfg(acc: &mut Completions, ctx: &CompletionContext) {
         Some("target_endian") => ["little", "big"].into_iter().for_each(add_completion),
         Some(name) => {
             if let Some(krate) = ctx.krate {
-                krate.potential_cfg(ctx.db).get_cfg_values(&name).cloned().for_each(|s| {
+                krate.potential_cfg(ctx.db).get_cfg_values(name).cloned().for_each(|s| {
                     let insert_text = format!(r#""{}""#, s);
                     let mut item =
                         CompletionItem::new(SymbolKind::BuiltinAttr, ctx.source_range(), s);
diff --git a/crates/ide_completion/src/completions/fn_param.rs b/crates/ide_completion/src/completions/fn_param.rs
index 961681c20cb..c5bc91d73d0 100644
--- a/crates/ide_completion/src/completions/fn_param.rs
+++ b/crates/ide_completion/src/completions/fn_param.rs
@@ -31,7 +31,7 @@ pub(crate) fn complete_fn_param(acc: &mut Completions, ctx: &CompletionContext)
             CompletionItem::new(CompletionItemKind::Binding, ctx.source_range(), label)
         };
         let mut item = match &comma_wrapper {
-            Some(fmt) => mk_item(&fmt(&label)),
+            Some(fmt) => mk_item(&fmt(label)),
             None => mk_item(label),
         };
         item.lookup_by(lookup);
@@ -40,7 +40,7 @@ pub(crate) fn complete_fn_param(acc: &mut Completions, ctx: &CompletionContext)
 
     match param_kind {
         ParamKind::Function(function) => {
-            fill_fn_params(ctx, function, &param_list, add_new_item_to_acc);
+            fill_fn_params(ctx, function, param_list, add_new_item_to_acc);
         }
         ParamKind::Closure(closure) => {
             let stmt_list = closure.syntax().ancestors().find_map(ast::StmtList::cast)?;
diff --git a/crates/ide_completion/src/completions/postfix.rs b/crates/ide_completion/src/completions/postfix.rs
index 23d4310aa9c..ead957a3f1a 100644
--- a/crates/ide_completion/src/completions/postfix.rs
+++ b/crates/ide_completion/src/completions/postfix.rs
@@ -51,7 +51,7 @@ pub(crate) fn complete_postfix(acc: &mut Completions, ctx: &CompletionContext) {
         None => return,
     };
 
-    let postfix_snippet = match build_postfix_snippet_builder(ctx, cap, &dot_receiver) {
+    let postfix_snippet = match build_postfix_snippet_builder(ctx, cap, dot_receiver) {
         Some(it) => it,
         None => return,
     };
@@ -265,7 +265,7 @@ fn add_custom_postfix_completions(
                 Some(imports) => imports,
                 None => return,
             };
-            let body = snippet.postfix_snippet(&receiver_text);
+            let body = snippet.postfix_snippet(receiver_text);
             let mut builder =
                 postfix_snippet(trigger, snippet.description.as_deref().unwrap_or_default(), &body);
             builder.documentation(Documentation::new(format!("```rust\n{}\n```", body)));
diff --git a/crates/ide_completion/src/completions/qualified_path.rs b/crates/ide_completion/src/completions/qualified_path.rs
index 86b1f534b27..ad93be4210a 100644
--- a/crates/ide_completion/src/completions/qualified_path.rs
+++ b/crates/ide_completion/src/completions/qualified_path.rs
@@ -74,7 +74,7 @@ pub(crate) fn complete_qualified_path(acc: &mut Completions, ctx: &CompletionCon
         }
         _ => {
             // Add associated types on type parameters and `Self`.
-            ctx.scope.assoc_type_shorthand_candidates(&resolution, |_, alias| {
+            ctx.scope.assoc_type_shorthand_candidates(resolution, |_, alias| {
                 acc.add_type_alias(ctx, alias);
                 None::<()>
             });
diff --git a/crates/ide_completion/src/completions/snippet.rs b/crates/ide_completion/src/completions/snippet.rs
index e4c4899477e..673ee51f78f 100644
--- a/crates/ide_completion/src/completions/snippet.rs
+++ b/crates/ide_completion/src/completions/snippet.rs
@@ -112,7 +112,7 @@ fn add_custom_completions(
                 None => return,
             };
             let body = snip.snippet();
-            let mut builder = snippet(ctx, cap, &trigger, &body);
+            let mut builder = snippet(ctx, cap, trigger, &body);
             builder.documentation(Documentation::new(format!("```rust\n{}\n```", body)));
             for import in imports.into_iter() {
                 builder.add_import(import);
diff --git a/crates/ide_db/src/defs.rs b/crates/ide_db/src/defs.rs
index d3d8ec6cbe1..fc48e642f0d 100644
--- a/crates/ide_db/src/defs.rs
+++ b/crates/ide_db/src/defs.rs
@@ -150,9 +150,9 @@ impl IdentClass {
         sema: &Semantics<RootDatabase>,
         lifetime: &ast::Lifetime,
     ) -> Option<IdentClass> {
-        NameRefClass::classify_lifetime(sema, &lifetime)
+        NameRefClass::classify_lifetime(sema, lifetime)
             .map(IdentClass::NameRefClass)
-            .or_else(|| NameClass::classify_lifetime(sema, &lifetime).map(IdentClass::NameClass))
+            .or_else(|| NameClass::classify_lifetime(sema, lifetime).map(IdentClass::NameClass))
     }
 
     pub fn definitions(self) -> ArrayVec<Definition, 2> {
diff --git a/crates/ide_db/src/imports/merge_imports.rs b/crates/ide_db/src/imports/merge_imports.rs
index 71859b7fc7d..9a9097ba5e2 100644
--- a/crates/ide_db/src/imports/merge_imports.rs
+++ b/crates/ide_db/src/imports/merge_imports.rs
@@ -75,7 +75,7 @@ fn try_merge_trees_mut(lhs: &ast::UseTree, rhs: &ast::UseTree, merge: MergeBehav
         lhs.split_prefix(&lhs_prefix);
         rhs.split_prefix(&rhs_prefix);
     }
-    recursive_merge(&lhs, &rhs, merge)
+    recursive_merge(lhs, rhs, merge)
 }
 
 /// Recursively merges rhs to lhs
@@ -157,7 +157,7 @@ fn recursive_merge(lhs: &ast::UseTree, rhs: &ast::UseTree, merge: MergeBehavior)
                 }
                 lhs_t.split_prefix(&lhs_prefix);
                 rhs_t.split_prefix(&rhs_prefix);
-                recursive_merge(&lhs_t, &rhs_t, merge)?;
+                recursive_merge(lhs_t, &rhs_t, merge)?;
             }
             Err(_)
                 if merge == MergeBehavior::Module
diff --git a/crates/ide_db/src/syntax_helpers/insert_whitespace_into_node.rs b/crates/ide_db/src/syntax_helpers/insert_whitespace_into_node.rs
index d59f13b9a1c..0f1dd96f6ff 100644
--- a/crates/ide_db/src/syntax_helpers/insert_whitespace_into_node.rs
+++ b/crates/ide_db/src/syntax_helpers/insert_whitespace_into_node.rs
@@ -69,7 +69,7 @@ pub fn insert_ws_into(syn: SyntaxNode) -> SyntaxNode {
                 if indent > 0 {
                     mods.push(do_indent(after, tok, indent));
                 }
-                mods.push(do_nl(after, &tok));
+                mods.push(do_nl(after, tok));
             }
             R_CURLY if is_last(|it| it != L_CURLY, true) => {
                 indent = indent.saturating_sub(1);
diff --git a/crates/ide_db/src/tests/sourcegen_lints.rs b/crates/ide_db/src/tests/sourcegen_lints.rs
index 44f8f217951..1555bad54e8 100644
--- a/crates/ide_db/src/tests/sourcegen_lints.rs
+++ b/crates/ide_db/src/tests/sourcegen_lints.rs
@@ -85,7 +85,7 @@ fn generate_lint_descriptor(buf: &mut String) {
         .sorted_by(|(ident, ..), (ident2, ..)| ident.cmp(ident2))
         .collect::<Vec<_>>();
     for (name, description, ..) in &lints {
-        push_lint_completion(buf, &name.replace("-", "_"), &description);
+        push_lint_completion(buf, &name.replace("-", "_"), description);
     }
     buf.push_str("];\n");
     buf.push_str(r#"pub const DEFAULT_LINT_GROUPS: &[LintGroup] = &["#);
@@ -93,10 +93,10 @@ fn generate_lint_descriptor(buf: &mut String) {
         if !children.is_empty() {
             // HACK: warnings is emitted with a general description, not with its members
             if name == &"warnings" {
-                push_lint_group(buf, &name, &description, &Vec::new());
+                push_lint_group(buf, name, description, &Vec::new());
                 continue;
             }
-            push_lint_group(buf, &name.replace("-", "_"), &description, children);
+            push_lint_group(buf, &name.replace("-", "_"), description, children);
         }
     }
     buf.push('\n');
@@ -136,14 +136,14 @@ fn generate_lint_descriptor(buf: &mut String) {
         .collect::<Vec<_>>();
 
     for (name, description, ..) in &lints_rustdoc {
-        push_lint_completion(buf, &name.replace("-", "_"), &description)
+        push_lint_completion(buf, &name.replace("-", "_"), description)
     }
     buf.push_str("];\n");
 
     buf.push_str(r#"pub const RUSTDOC_LINT_GROUPS: &[LintGroup] = &["#);
     for (name, description, children) in &lints_rustdoc {
         if !children.is_empty() {
-            push_lint_group(buf, &name.replace("-", "_"), &description, children);
+            push_lint_group(buf, &name.replace("-", "_"), description, children);
         }
     }
     buf.push('\n');
diff --git a/crates/mbe/src/syntax_bridge.rs b/crates/mbe/src/syntax_bridge.rs
index 7e12647cd86..21a0aa4284a 100644
--- a/crates/mbe/src/syntax_bridge.rs
+++ b/crates/mbe/src/syntax_bridge.rs
@@ -170,9 +170,9 @@ fn convert_tokens<C: TokenConvertor>(conv: &mut C) -> tt::Subtree {
             Some(it) => it,
             None => break,
         };
-        let synth_id = token.synthetic_id(&conv);
+        let synth_id = token.synthetic_id(conv);
 
-        let kind = token.kind(&conv);
+        let kind = token.kind(conv);
         if kind == COMMENT {
             if let Some(tokens) = conv.convert_doc_comment(&token) {
                 // FIXME: There has to be a better way to do this
@@ -227,7 +227,7 @@ fn convert_tokens<C: TokenConvertor>(conv: &mut C) -> tt::Subtree {
                 continue;
             }
 
-            let spacing = match conv.peek().map(|next| next.kind(&conv)) {
+            let spacing = match conv.peek().map(|next| next.kind(conv)) {
                 Some(kind)
                     if !kind.is_trivia()
                         && kind.is_punct()
@@ -240,7 +240,7 @@ fn convert_tokens<C: TokenConvertor>(conv: &mut C) -> tt::Subtree {
                 }
                 _ => tt::Spacing::Alone,
             };
-            let char = match token.to_char(&conv) {
+            let char = match token.to_char(conv) {
                 Some(c) => c,
                 None => {
                     panic!("Token from lexer must be single char: token = {:#?}", token);
diff --git a/crates/proc_macro_api/src/msg.rs b/crates/proc_macro_api/src/msg.rs
index da96c81d49f..f9c2b9fda3a 100644
--- a/crates/proc_macro_api/src/msg.rs
+++ b/crates/proc_macro_api/src/msg.rs
@@ -74,14 +74,11 @@ pub trait Message: Serialize + DeserializeOwned {
 impl Message for Request {}
 impl Message for Response {}
 
-fn read_json<'a>(
-    inp: &mut impl BufRead,
-    mut buf: &'a mut String,
-) -> io::Result<Option<&'a String>> {
+fn read_json<'a>(inp: &mut impl BufRead, buf: &'a mut String) -> io::Result<Option<&'a String>> {
     loop {
         buf.clear();
 
-        inp.read_line(&mut buf)?;
+        inp.read_line(buf)?;
         buf.pop(); // Remove trailing '\n'
 
         if buf.is_empty() {
diff --git a/crates/proc_macro_srv/src/dylib.rs b/crates/proc_macro_srv/src/dylib.rs
index cc0b816a535..2b6c070fece 100644
--- a/crates/proc_macro_srv/src/dylib.rs
+++ b/crates/proc_macro_srv/src/dylib.rs
@@ -121,7 +121,7 @@ impl ProcMacroLibraryLibloading {
         let abs_file: &AbsPath = file.try_into().map_err(|_| {
             invalid_data_err(format!("expected an absolute path, got {}", file.display()))
         })?;
-        let version_info = read_dylib_info(&abs_file)?;
+        let version_info = read_dylib_info(abs_file)?;
 
         let lib = load_library(file).map_err(invalid_data_err)?;
         let abi = Abi::from_lib(&lib, symbol_name, version_info)?;
diff --git a/crates/rust-analyzer/src/diagnostics/to_proto.rs b/crates/rust-analyzer/src/diagnostics/to_proto.rs
index 5f936ee0865..dd59923cb34 100644
--- a/crates/rust-analyzer/src/diagnostics/to_proto.rs
+++ b/crates/rust-analyzer/src/diagnostics/to_proto.rs
@@ -24,7 +24,7 @@ fn diagnostic_severity(
             // HACK: special case for `warnings` rustc lint.
             Some(code)
                 if config.warnings_as_hint.iter().any(|lint| {
-                    lint == "warnings" || ide_db::helpers::lint_eq_or_in_group(&code.code, &lint)
+                    lint == "warnings" || ide_db::helpers::lint_eq_or_in_group(&code.code, lint)
                 }) =>
             {
                 lsp_types::DiagnosticSeverity::HINT
@@ -32,7 +32,7 @@ fn diagnostic_severity(
             // HACK: special case for `warnings` rustc lint.
             Some(code)
                 if config.warnings_as_info.iter().any(|lint| {
-                    lint == "warnings" || ide_db::helpers::lint_eq_or_in_group(&code.code, &lint)
+                    lint == "warnings" || ide_db::helpers::lint_eq_or_in_group(&code.code, lint)
                 }) =>
             {
                 lsp_types::DiagnosticSeverity::INFORMATION
diff --git a/crates/rust-analyzer/src/dispatch.rs b/crates/rust-analyzer/src/dispatch.rs
index 19aa33fe978..8a7ee7e9c23 100644
--- a/crates/rust-analyzer/src/dispatch.rs
+++ b/crates/rust-analyzer/src/dispatch.rs
@@ -48,7 +48,7 @@ impl<'a> RequestDispatcher<'a> {
         };
         let _pctx = stdx::panic_context::enter(panic_context);
 
-        let result = f(&mut self.global_state, params);
+        let result = f(self.global_state, params);
         let response = result_to_response::<R>(id, result);
 
         self.global_state.respond(response);