diff --git a/crates/ide_completion/src/completions/attribute/cfg.rs b/crates/ide_completion/src/completions/attribute/cfg.rs
index 847e6529a1b..72b68f3b9f9 100644
--- a/crates/ide_completion/src/completions/attribute/cfg.rs
+++ b/crates/ide_completion/src/completions/attribute/cfg.rs
@@ -32,7 +32,7 @@ pub(crate) fn complete_cfg(acc: &mut Completions, ctx: &CompletionContext) {
         Some("target_vendor") => KNOWN_VENDOR.iter().for_each(add_completion),
         Some("target_endian") => ["little", "big"].iter().for_each(add_completion),
         Some(name) => {
-            ctx.krate.map(|krate| {
+            if let Some(krate) = ctx.krate {
                 krate.potential_cfg(ctx.db).get_cfg_values(&name).iter().for_each(|s| {
                     let mut item = CompletionItem::new(
                         CompletionKind::Attribute,
@@ -43,10 +43,10 @@ pub(crate) fn complete_cfg(acc: &mut Completions, ctx: &CompletionContext) {
 
                     acc.add(item.build());
                 })
-            });
+            };
         }
         None => {
-            ctx.krate.map(|krate| {
+            if let Some(krate) = ctx.krate {
                 krate.potential_cfg(ctx.db).get_cfg_keys().iter().for_each(|s| {
                     let item = CompletionItem::new(
                         CompletionKind::Attribute,
@@ -55,12 +55,12 @@ pub(crate) fn complete_cfg(acc: &mut Completions, ctx: &CompletionContext) {
                     );
                     acc.add(item.build());
                 })
-            });
+            }
         }
     };
 }
 
-const KNOWN_ARCH: [&'static str; 19] = [
+const KNOWN_ARCH: [&str; 19] = [
     "aarch64",
     "arm",
     "avr",
@@ -82,10 +82,9 @@ pub(crate) fn complete_cfg(acc: &mut Completions, ctx: &CompletionContext) {
     "x86_64",
 ];
 
-const KNOWN_ENV: [&'static str; 7] =
-    ["eabihf", "gnu", "gnueabihf", "msvc", "relibc", "sgx", "uclibc"];
+const KNOWN_ENV: [&str; 7] = ["eabihf", "gnu", "gnueabihf", "msvc", "relibc", "sgx", "uclibc"];
 
-const KNOWN_OS: [&'static str; 20] = [
+const KNOWN_OS: [&str; 20] = [
     "cuda",
     "dragonfly",
     "emscripten",
@@ -108,5 +107,5 @@ pub(crate) fn complete_cfg(acc: &mut Completions, ctx: &CompletionContext) {
     "windows",
 ];
 
-const KNOWN_VENDOR: [&'static str; 8] =
+const KNOWN_VENDOR: [&str; 8] =
     ["apple", "fortanix", "nvidia", "pc", "sony", "unknown", "wrs", "uwp"];
diff --git a/crates/ide_completion/src/completions/attribute/lint.rs b/crates/ide_completion/src/completions/attribute/lint.rs
index bb7f4c8d3b3..8b17be09b1c 100644
--- a/crates/ide_completion/src/completions/attribute/lint.rs
+++ b/crates/ide_completion/src/completions/attribute/lint.rs
@@ -15,9 +15,8 @@ pub(super) fn complete_lint(
     lints_completions: &[Lint],
 ) {
     if let Some(existing_lints) = super::parse_comma_sep_input(derive_input) {
-        for lint_completion in lints_completions
-            .into_iter()
-            .filter(|completion| !existing_lints.contains(completion.label))
+        for lint_completion in
+            lints_completions.iter().filter(|completion| !existing_lints.contains(completion.label))
         {
             let mut item = CompletionItem::new(
                 CompletionKind::Attribute,
diff --git a/crates/ide_completion/src/completions/postfix.rs b/crates/ide_completion/src/completions/postfix.rs
index 8aaaa104779..8ac54cc1b4a 100644
--- a/crates/ide_completion/src/completions/postfix.rs
+++ b/crates/ide_completion/src/completions/postfix.rs
@@ -322,8 +322,8 @@ fn postfix_snippet(
     let mut item = CompletionItem::new(CompletionKind::Postfix, ctx.source_range(), label);
     item.detail(detail).kind(CompletionItemKind::Snippet).snippet_edit(cap, edit);
     if ctx.original_token.text() == label {
-        let mut relevance = CompletionRelevance::default();
-        relevance.exact_postfix_snippet_match = true;
+        let relevance =
+            CompletionRelevance { exact_postfix_snippet_match: true, ..Default::default() };
         item.set_relevance(relevance);
     }
 
diff --git a/crates/ide_completion/src/completions/postfix/format_like.rs b/crates/ide_completion/src/completions/postfix/format_like.rs
index 2dc13c293a6..d4061203c71 100644
--- a/crates/ide_completion/src/completions/postfix/format_like.rs
+++ b/crates/ide_completion/src/completions/postfix/format_like.rs
@@ -51,7 +51,7 @@ pub(crate) fn add_format_like_completions(
 
     if parser.parse().is_ok() {
         for (label, macro_name) in KINDS {
-            let snippet = parser.into_suggestion(macro_name);
+            let snippet = parser.to_suggestion(macro_name);
 
             postfix_snippet(ctx, cap, dot_receiver, label, macro_name, &snippet).add_to(acc);
         }
@@ -201,7 +201,7 @@ pub(crate) fn parse(&mut self) -> Result<(), ()> {
         Ok(())
     }
 
-    pub(crate) fn into_suggestion(&self, macro_name: &str) -> String {
+    pub(crate) fn to_suggestion(&self, macro_name: &str) -> String {
         assert!(self.parsed, "Attempt to get a suggestion from not parsed expression");
 
         let expressions_as_string = self.extracted_expressions.join(", ");
@@ -283,7 +283,7 @@ fn test_into_suggestion() {
             let mut parser = FormatStrParser::new((*input).to_owned());
             parser.parse().expect("Parsing must succeed");
 
-            assert_eq!(&parser.into_suggestion(*kind), output);
+            assert_eq!(&parser.to_suggestion(*kind), output);
         }
     }
 }
diff --git a/crates/ide_completion/src/render/const_.rs b/crates/ide_completion/src/render/const_.rs
index 0a17d8023d8..4609f2e9675 100644
--- a/crates/ide_completion/src/render/const_.rs
+++ b/crates/ide_completion/src/render/const_.rs
@@ -12,10 +12,7 @@
     render::RenderContext,
 };
 
-pub(crate) fn render_const<'a>(
-    ctx: RenderContext<'a>,
-    const_: hir::Const,
-) -> Option<CompletionItem> {
+pub(crate) fn render_const(ctx: RenderContext<'_>, const_: hir::Const) -> Option<CompletionItem> {
     ConstRender::new(ctx, const_)?.render()
 }
 
@@ -50,7 +47,7 @@ fn render(self) -> Option<CompletionItem> {
         if let Some(actm) = self.const_.as_assoc_item(db) {
             if let Some(trt) = actm.containing_trait_or_trait_impl(db) {
                 item.trait_name(trt.name(db).to_string());
-                item.insert_text(name.clone());
+                item.insert_text(name);
             }
         }
 
diff --git a/crates/ide_completion/src/render/enum_variant.rs b/crates/ide_completion/src/render/enum_variant.rs
index 91dc178f345..44a5ceb25ad 100644
--- a/crates/ide_completion/src/render/enum_variant.rs
+++ b/crates/ide_completion/src/render/enum_variant.rs
@@ -12,8 +12,8 @@
     CompletionRelevance,
 };
 
-pub(crate) fn render_variant<'a>(
-    ctx: RenderContext<'a>,
+pub(crate) fn render_variant(
+    ctx: RenderContext<'_>,
     import_to_add: Option<ImportEdit>,
     local_name: Option<hir::Name>,
     variant: hir::Variant,
diff --git a/crates/ide_completion/src/render/function.rs b/crates/ide_completion/src/render/function.rs
index 5ad1c899eeb..87714def967 100644
--- a/crates/ide_completion/src/render/function.rs
+++ b/crates/ide_completion/src/render/function.rs
@@ -13,8 +13,8 @@
     },
 };
 
-pub(crate) fn render_fn<'a>(
-    ctx: RenderContext<'a>,
+pub(crate) fn render_fn(
+    ctx: RenderContext<'_>,
     import_to_add: Option<ImportEdit>,
     local_name: Option<hir::Name>,
     fn_: hir::Function,
@@ -23,8 +23,8 @@ pub(crate) fn render_fn<'a>(
     Some(FunctionRender::new(ctx, None, local_name, fn_, false)?.render(import_to_add))
 }
 
-pub(crate) fn render_method<'a>(
-    ctx: RenderContext<'a>,
+pub(crate) fn render_method(
+    ctx: RenderContext<'_>,
     import_to_add: Option<ImportEdit>,
     receiver: Option<hir::Name>,
     local_name: Option<hir::Name>,
diff --git a/crates/ide_completion/src/render/macro_.rs b/crates/ide_completion/src/render/macro_.rs
index 4d5179c4f95..80c05273ca3 100644
--- a/crates/ide_completion/src/render/macro_.rs
+++ b/crates/ide_completion/src/render/macro_.rs
@@ -10,8 +10,8 @@
     render::RenderContext,
 };
 
-pub(crate) fn render_macro<'a>(
-    ctx: RenderContext<'a>,
+pub(crate) fn render_macro(
+    ctx: RenderContext<'_>,
     import_to_add: Option<ImportEdit>,
     name: hir::Name,
     macro_: hir::MacroDef,
@@ -76,12 +76,10 @@ fn needs_bang(&self) -> bool {
     fn label(&self) -> String {
         if self.needs_bang() && self.ctx.snippet_cap().is_some() {
             format!("{}!{}…{}", self.name, self.bra, self.ket)
+        } else if self.macro_.kind() == hir::MacroKind::Derive {
+            self.name.to_string()
         } else {
-            if self.macro_.kind() == hir::MacroKind::Derive {
-                self.name.to_string()
-            } else {
-                self.banged_name()
-            }
+            self.banged_name()
         }
     }
 
diff --git a/crates/ide_completion/src/render/pattern.rs b/crates/ide_completion/src/render/pattern.rs
index 3717a0409a9..17dd6662f5f 100644
--- a/crates/ide_completion/src/render/pattern.rs
+++ b/crates/ide_completion/src/render/pattern.rs
@@ -139,7 +139,7 @@ fn visible_fields(
     let module = ctx.completion.scope.module()?;
     let n_fields = fields.len();
     let fields = fields
-        .into_iter()
+        .iter()
         .filter(|field| field.is_visible_from(ctx.db(), module))
         .copied()
         .collect::<Vec<_>>();
diff --git a/crates/ide_completion/src/render/type_alias.rs b/crates/ide_completion/src/render/type_alias.rs
index 9549678b69e..6021448e784 100644
--- a/crates/ide_completion/src/render/type_alias.rs
+++ b/crates/ide_completion/src/render/type_alias.rs
@@ -12,15 +12,15 @@
     render::RenderContext,
 };
 
-pub(crate) fn render_type_alias<'a>(
-    ctx: RenderContext<'a>,
+pub(crate) fn render_type_alias(
+    ctx: RenderContext<'_>,
     type_alias: hir::TypeAlias,
 ) -> Option<CompletionItem> {
     TypeAliasRender::new(ctx, type_alias)?.render(false)
 }
 
-pub(crate) fn render_type_alias_with_eq<'a>(
-    ctx: RenderContext<'a>,
+pub(crate) fn render_type_alias_with_eq(
+    ctx: RenderContext<'_>,
     type_alias: hir::TypeAlias,
 ) -> Option<CompletionItem> {
     TypeAliasRender::new(ctx, type_alias)?.render(true)
@@ -63,7 +63,7 @@ fn render(self, with_eq: bool) -> Option<CompletionItem> {
         if let Some(actm) = self.type_alias.as_assoc_item(db) {
             if let Some(trt) = actm.containing_trait_or_trait_impl(db) {
                 item.trait_name(trt.name(db).to_string());
-                item.insert_text(name.clone());
+                item.insert_text(name);
             }
         }