fix existing clippy tests

clippy_lints/src/use_self.rs

@@ -34,7 +34,7 @@ declare_clippy_lint! {
     ///
     /// ### Example
     /// ```rust
-    /// struct Foo {}
+    /// struct Foo;
     /// impl Foo {
     ///     fn new() -> Foo {
     ///         Foo {}
@@ -43,7 +43,7 @@ declare_clippy_lint! {
     /// ```
     /// could be
     /// ```rust
-    /// struct Foo {}
+    /// struct Foo;
     /// impl Foo {
     ///     fn new() -> Self {
     ///         Self {}

tests/ui-toml/struct_excessive_bools/test.rs

@@ -4,6 +4,6 @@ struct S {
     a: bool,
 }
 
-struct Foo {}
+struct Foo;
 
 fn main() {}

tests/ui/case_sensitive_file_extension_comparisons.rs

@@ -2,7 +2,7 @@
 
 use std::string::String;
 
-struct TestStruct {}
+struct TestStruct;
 
 impl TestStruct {
     fn ends_with(self, arg: &str) {}

tests/ui/crashes/ice-2774.rs

@@ -8,7 +8,7 @@ pub struct Bar {
 }
 
 #[derive(Eq, PartialEq, Debug, Hash)]
-pub struct Foo {}
+pub struct Foo;
 
 #[allow(clippy::implicit_hasher)]
 // This should not cause a "cannot relate bound region" ICE.

tests/ui/crashes/ice-6179.rs

@@ -4,7 +4,7 @@
 #![warn(clippy::use_self)]
 #![allow(dead_code)]
 
-struct Foo {}
+struct Foo;
 
 impl Foo {
     fn new() -> Self {

tests/ui/crashes/ice-6792.rs

@@ -7,7 +7,7 @@ trait Trait {
     fn broken() -> Self::Ty;
 }
 
-struct Foo {}
+struct Foo;
 
 impl Trait for Foo {
     type Ty = Foo;

tests/ui/crashes/needless_lifetimes_impl_trait.rs

@@ -3,7 +3,7 @@
 
 trait Foo {}
 
-struct Bar {}
+struct Bar;
 
 struct Baz<'a> {
     bar: &'a Bar,

tests/ui/crashes/regressions.rs

@@ -6,6 +6,6 @@ pub fn foo(bar: *const u8) {
 
 // Regression test for https://github.com/rust-lang/rust-clippy/issues/4917
 /// <foo
-struct A {}
+struct A;
 
 fn main() {}

tests/ui/default_numeric_fallback_f64.fixed

@@ -134,7 +134,7 @@ mod enum_ctor {
 }
 
 mod method_calls {
-    struct StructForMethodCallTest {}
+    struct StructForMethodCallTest;
 
     impl StructForMethodCallTest {
         fn concrete_arg(&self, f: f64) {}

tests/ui/default_numeric_fallback_f64.rs

@@ -134,7 +134,7 @@ mod enum_ctor {
 }
 
 mod method_calls {
-    struct StructForMethodCallTest {}
+    struct StructForMethodCallTest;
 
     impl StructForMethodCallTest {
         fn concrete_arg(&self, f: f64) {}

tests/ui/default_numeric_fallback_i32.fixed

@@ -133,7 +133,7 @@ mod enum_ctor {
 }
 
 mod method_calls {
-    struct StructForMethodCallTest {}
+    struct StructForMethodCallTest;
 
     impl StructForMethodCallTest {
         fn concrete_arg(&self, x: i32) {}

tests/ui/default_numeric_fallback_i32.rs

@@ -133,7 +133,7 @@ mod enum_ctor {
 }
 
 mod method_calls {
-    struct StructForMethodCallTest {}
+    struct StructForMethodCallTest;
 
     impl StructForMethodCallTest {
         fn concrete_arg(&self, x: i32) {}

tests/ui/drop_forget_copy.rs

@@ -5,7 +5,7 @@ use std::mem::{drop, forget};
 use std::vec::Vec;
 
 #[derive(Copy, Clone)]
-struct SomeStruct {}
+struct SomeStruct;
 
 struct AnotherStruct {
     x: u8,

tests/ui/fn_params_excessive_bools.rs

@@ -20,7 +20,7 @@ fn h(_: bool, _: bool, _: bool) {}
 fn e(_: S, _: S, _: Box<S>, _: Vec<u32>) {}
 fn t(_: S, _: S, _: Box<S>, _: Vec<u32>, _: bool, _: bool, _: bool, _: bool) {}
 
-struct S {}
+struct S;
 trait Trait {
     fn f(_: bool, _: bool, _: bool, _: bool);
     fn g(_: bool, _: bool, _: bool, _: Vec<u32>);

tests/ui/implicit_clone.rs

@@ -30,7 +30,7 @@ where
 }
 
 #[derive(Copy, Clone)]
-struct Kitten {}
+struct Kitten;
 impl Kitten {
     // badly named method
     fn to_vec(self) -> Kitten {
@@ -44,7 +44,7 @@ impl Borrow<BorrowedKitten> for Kitten {
     }
 }
 
-struct BorrowedKitten {}
+struct BorrowedKitten;
 impl ToOwned for BorrowedKitten {
     type Owned = Kitten;
     fn to_owned(&self) -> Kitten {

tests/ui/iter_nth_zero.fixed

@@ -3,7 +3,7 @@
 #![warn(clippy::iter_nth_zero)]
 use std::collections::HashSet;
 
-struct Foo {}
+struct Foo;
 
 impl Foo {
     fn nth(&self, index: usize) -> usize {

tests/ui/iter_nth_zero.rs

@@ -3,7 +3,7 @@
 #![warn(clippy::iter_nth_zero)]
 use std::collections::HashSet;
 
-struct Foo {}
+struct Foo;
 
 impl Foo {
     fn nth(&self, index: usize) -> usize {

tests/ui/large_types_passed_by_value.rs

@@ -37,7 +37,7 @@ pub trait PubLargeTypeDevourer {
     fn devoure_array_in_public(&self, array: [u8; 6666]);
 }
 
-struct S {}
+struct S;
 impl LargeTypeDevourer for S {
     fn devoure_array(&self, array: [u8; 6666]) {
         todo!();

tests/ui/let_and_return.rs

@@ -88,7 +88,7 @@ mod no_lint_if_stmt_borrows {
             ret
         }
 
-        struct Bar {}
+        struct Bar;
 
         impl Bar {
             fn new() -> Self {

tests/ui/let_underscore_must_use.rs

@@ -26,7 +26,7 @@ fn h() -> u32 {
     0
 }
 
-struct S {}
+struct S;
 
 impl S {
     #[must_use]

tests/ui/manual_async_fn.fixed

@@ -38,7 +38,7 @@ async fn already_async() -> impl Future<Output = i32> {
     async { 42 }
 }
 
-struct S {}
+struct S;
 impl S {
     async fn inh_fut() -> i32 {
         // NOTE: this code is here just to check that the indentation is correct in the suggested fix

tests/ui/manual_async_fn.rs

@@ -52,7 +52,7 @@ async fn already_async() -> impl Future<Output = i32> {
     async { 42 }
 }
 
-struct S {}
+struct S;
 impl S {
     fn inh_fut() -> impl Future<Output = i32> {
         async {

tests/ui/manual_unwrap_or.fixed

@@ -78,7 +78,7 @@ fn result_unwrap_or() {
     (Ok(1) as Result<i32, &str>).unwrap_or(42);
 
     // method call case, suggestion must not surround Result expr `s.method()` with parentheses
-    struct S {}
+    struct S;
     impl S {
         fn method(self) -> Option<i32> {
             Some(42)

tests/ui/manual_unwrap_or.rs

@@ -102,7 +102,7 @@ fn result_unwrap_or() {
     };
 
     // method call case, suggestion must not surround Result expr `s.method()` with parentheses
-    struct S {}
+    struct S;
     impl S {
         fn method(self) -> Option<i32> {
             Some(42)

tests/ui/map_unit_fn.rs

@@ -1,5 +1,5 @@
 #![allow(unused)]
-struct Mappable {}
+struct Mappable;
 
 impl Mappable {
     pub fn map(&self) {}

tests/ui/min_rust_version_attr.rs

@@ -99,7 +99,7 @@ pub fn manual_range_contains() {
 }
 
 pub fn use_self() {
-    struct Foo {}
+    struct Foo;
 
     impl Foo {
         fn new() -> Foo {

tests/ui/missing_inline.rs

@@ -7,8 +7,8 @@
 type Typedef = String;
 pub type PubTypedef = String;
 
-struct Foo {} // ok
-pub struct PubFoo {} // ok
+struct Foo; // ok
+pub struct PubFoo; // ok
 enum FooE {} // ok
 pub enum PubFooE {} // ok
 
@@ -63,4 +63,4 @@ impl PubFoo {
 
 // do not lint this since users cannot control the external code
 #[derive(Debug)]
-pub struct S {}
+pub struct S;

tests/ui/module_name_repetitions.rs

@@ -7,7 +7,7 @@ mod foo {
     pub fn foo() {}
     pub fn foo_bar() {}
     pub fn bar_foo() {}
-    pub struct FooCake {}
+    pub struct FooCake;
     pub enum CakeFoo {}
     pub struct Foo7Bar;
 

tests/ui/needless_arbitrary_self_type_unfixable.rs

@@ -14,7 +14,7 @@ mod issue_6089 {
                 fn test(self: &Self);
             }
 
-            struct S1 {}
+            struct S1;
 
             impl T1 for S1 {
                 fn test(self: &Self) {}
@@ -32,7 +32,7 @@ mod issue_6089 {
         fn call_with_mut_self(&mut self);
     }
 
-    struct S2 {}
+    struct S2;
 
     // The method's signature will be expanded to:
     //  fn call_with_mut_self<'life0>(self: &'life0 mut Self) {}

tests/ui/needless_lifetimes.rs

@@ -268,7 +268,7 @@ mod issue4291 {
 
 mod issue2944 {
     trait Foo {}
-    struct Bar {}
+    struct Bar;
     struct Baz<'a> {
         bar: &'a Bar,
     }

tests/ui/no_effect.rs

@@ -68,7 +68,7 @@ impl FnOnce<(&str,)> for GreetStruct1 {
     }
 }
 
-struct GreetStruct2();
+struct GreetStruct2;
 
 impl FnOnce<(&str,)> for GreetStruct2 {
     type Output = ();
@@ -78,7 +78,7 @@ impl FnOnce<(&str,)> for GreetStruct2 {
     }
 }
 
-struct GreetStruct3 {}
+struct GreetStruct3;
 
 impl FnOnce<(&str,)> for GreetStruct3 {
     type Output = ();

tests/ui/or_then_unwrap.fixed

@@ -3,7 +3,7 @@
 #![warn(clippy::or_then_unwrap)]
 #![allow(clippy::map_identity)]
 
-struct SomeStruct {}
+struct SomeStruct;
 impl SomeStruct {
     fn or(self, _: Option<Self>) -> Self {
         self
@@ -11,7 +11,7 @@ impl SomeStruct {
     fn unwrap(&self) {}
 }
 
-struct SomeOtherStruct {}
+struct SomeOtherStruct;
 impl SomeOtherStruct {
     fn or(self) -> Self {
         self

tests/ui/or_then_unwrap.rs

@@ -3,7 +3,7 @@
 #![warn(clippy::or_then_unwrap)]
 #![allow(clippy::map_identity)]
 
-struct SomeStruct {}
+struct SomeStruct;
 impl SomeStruct {
     fn or(self, _: Option<Self>) -> Self {
         self
@@ -11,7 +11,7 @@ impl SomeStruct {
     fn unwrap(&self) {}
 }
 
-struct SomeOtherStruct {}
+struct SomeOtherStruct;
 impl SomeOtherStruct {
     fn or(self) -> Self {
         self

tests/ui/ptr_arg.rs

@@ -112,7 +112,7 @@ mod issue_5644 {
     ) {
     }
 
-    struct S {}
+    struct S;
     impl S {
         fn allowed(
             #[allow(clippy::ptr_arg)] _v: &Vec<u32>,

tests/ui/recursive_format_impl.rs

@@ -66,7 +66,7 @@ impl std::fmt::Display for D {
 
 // Check for use of self as Display, in Display impl
 // Triggers on direct use of self
-struct G {}
+struct G;
 
 impl std::fmt::Display for G {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
@@ -75,7 +75,7 @@ impl std::fmt::Display for G {
 }
 
 // Triggers on reference to self
-struct H {}
+struct H;
 
 impl std::fmt::Display for H {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
@@ -90,7 +90,7 @@ impl std::fmt::Debug for H {
 }
 
 // Triggers on multiple reference to self
-struct H2 {}
+struct H2;
 
 impl std::fmt::Display for H2 {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
@@ -99,7 +99,7 @@ impl std::fmt::Display for H2 {
 }
 
 // Doesn't trigger on correct deref
-struct I {}
+struct I;
 
 impl std::ops::Deref for I {
     type Target = str;
@@ -122,7 +122,7 @@ impl std::fmt::Debug for I {
 }
 
 // Doesn't trigger on multiple correct deref
-struct I2 {}
+struct I2;
 
 impl std::ops::Deref for I2 {
     type Target = str;
@@ -139,7 +139,7 @@ impl std::fmt::Display for I2 {
 }
 
 // Doesn't trigger on multiple correct deref
-struct I3 {}
+struct I3;
 
 impl std::ops::Deref for I3 {
     type Target = str;
@@ -156,7 +156,7 @@ impl std::fmt::Display for I3 {
 }
 
 // Does trigger when deref resolves to self
-struct J {}
+struct J;
 
 impl std::ops::Deref for J {
     type Target = str;
@@ -178,7 +178,7 @@ impl std::fmt::Debug for J {
     }
 }
 
-struct J2 {}
+struct J2;
 
 impl std::ops::Deref for J2 {
     type Target = str;
@@ -194,7 +194,7 @@ impl std::fmt::Display for J2 {
     }
 }
 
-struct J3 {}
+struct J3;
 
 impl std::ops::Deref for J3 {
     type Target = str;
@@ -210,7 +210,7 @@ impl std::fmt::Display for J3 {
     }
 }
 
-struct J4 {}
+struct J4;
 
 impl std::ops::Deref for J4 {
     type Target = str;
@@ -227,7 +227,7 @@ impl std::fmt::Display for J4 {
 }
 
 // Doesn't trigger on Debug from Display
-struct K {}
+struct K;
 
 impl std::fmt::Debug for K {
     fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
@@ -242,7 +242,7 @@ impl std::fmt::Display for K {
 }
 
 // Doesn't trigger on Display from Debug
-struct K2 {}
+struct K2;
 
 impl std::fmt::Debug for K2 {
     fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {

tests/ui/redundant_allocation.rs

@@ -3,7 +3,7 @@
 #![allow(clippy::blacklisted_name, unused_variables, dead_code)]
 #![allow(unused_imports)]
 
-pub struct MyStruct {}
+pub struct MyStruct;
 
 pub struct SubT<T> {
     foo: T,

tests/ui/redundant_allocation_fixable.fixed

@@ -4,7 +4,7 @@
 #![allow(clippy::blacklisted_name, unused_variables, dead_code)]
 #![allow(unused_imports)]
 
-pub struct MyStruct {}
+pub struct MyStruct;
 
 pub struct SubT<T> {
     foo: T,

tests/ui/redundant_static_lifetimes.fixed

@@ -3,7 +3,7 @@
 #![allow(unused)]
 
 #[derive(Debug)]
-struct Foo {}
+struct Foo;
 
 const VAR_ONE: &str = "Test constant #1"; // ERROR Consider removing 'static.
 

tests/ui/redundant_static_lifetimes.rs

@@ -3,7 +3,7 @@
 #![allow(unused)]
 
 #[derive(Debug)]
-struct Foo {}
+struct Foo;
 
 const VAR_ONE: &'static str = "Test constant #1"; // ERROR Consider removing 'static.
 

tests/ui/same_item_push.rs

@@ -120,7 +120,7 @@ fn main() {
     }
     // Fix #5979
     #[derive(Clone)]
-    struct S {}
+    struct S;
 
     trait T {}
     impl T for S {}

tests/ui/trait_duplication_in_bounds.rs

@@ -62,7 +62,7 @@ trait BadTrait: Default + Clone {
 }
 
 #[derive(Default, Clone)]
-struct Life {}
+struct Life;
 
 impl T for Life {
     // this should not warn
@@ -85,7 +85,7 @@ trait Iter: Iterator {
     }
 }
 
-struct Foo {}
+struct Foo;
 
 trait FooIter: Iterator<Item = Foo> {
     fn bar()

tests/ui/unit_like_struct_brackets.fixed

@@ -2,12 +2,13 @@
 #![warn(clippy::unit_like_struct_brackets)]
 #![allow(dead_code)]
 
-pub struct MyEmptyStruct;             // should trigger lint
-struct MyEmptyTupleStruct;            // should trigger lint
+pub struct MyEmptyStruct; // should trigger lint
+struct MyEmptyTupleStruct; // should trigger lint
 
-struct MyStruct {                       // should not trigger lint
+struct MyStruct {
+    // should not trigger lint
     field: u8,
 }
-struct MyTupleStruct(usize, String);    // should not trigger lint
+struct MyTupleStruct(usize, String); // should not trigger lint
 
 fn main() {}

tests/ui/unit_like_struct_brackets.rs

@@ -2,12 +2,13 @@
 #![warn(clippy::unit_like_struct_brackets)]
 #![allow(dead_code)]
 
-pub struct MyEmptyStruct {}             // should trigger lint
-struct MyEmptyTupleStruct();            // should trigger lint
+pub struct MyEmptyStruct {} // should trigger lint
+struct MyEmptyTupleStruct(); // should trigger lint
 
-struct MyStruct {                       // should not trigger lint
+struct MyStruct {
+    // should not trigger lint
     field: u8,
 }
-struct MyTupleStruct(usize, String);    // should not trigger lint
+struct MyTupleStruct(usize, String); // should not trigger lint
 
 fn main() {}

tests/ui/unsafe_derive_deserialize.rs

@@ -6,7 +6,7 @@ extern crate serde;
 use serde::Deserialize;
 
 #[derive(Deserialize)]
-pub struct A {}
+pub struct A;
 impl A {
     pub unsafe fn new(_a: i32, _b: i32) -> Self {
         Self {}
@@ -14,13 +14,13 @@ impl A {
 }
 
 #[derive(Deserialize)]
-pub struct B {}
+pub struct B;
 impl B {
     pub unsafe fn unsafe_method(&self) {}
 }
 
 #[derive(Deserialize)]
-pub struct C {}
+pub struct C;
 impl C {
     pub fn unsafe_block(&self) {
         unsafe {}
@@ -28,7 +28,7 @@ impl C {
 }
 
 #[derive(Deserialize)]
-pub struct D {}
+pub struct D;
 impl D {
     pub fn inner_unsafe_fn(&self) {
         unsafe fn inner() {}
@@ -36,7 +36,7 @@ impl D {
 }
 
 // Does not derive `Deserialize`, should be ignored
-pub struct E {}
+pub struct E;
 impl E {
     pub unsafe fn new(_a: i32, _b: i32) -> Self {
         Self {}
@@ -55,12 +55,12 @@ impl E {
 
 // Does not have methods using `unsafe`, should be ignored
 #[derive(Deserialize)]
-pub struct F {}
+pub struct F;
 
 // Check that we honor the `allow` attribute on the ADT
 #[allow(clippy::unsafe_derive_deserialize)]
 #[derive(Deserialize)]
-pub struct G {}
+pub struct G;
 impl G {
     pub fn unsafe_block(&self) {
         unsafe {}

tests/ui/unsafe_removed_from_name.rs

@@ -14,8 +14,8 @@ use std::cell::UnsafeCell as Dangerunsafe;
 use std::cell::UnsafeCell as Bombsawayunsafe;
 
 mod mod_with_some_unsafe_things {
-    pub struct Safe {}
-    pub struct Unsafe {}
+    pub struct Safe;
+    pub struct Unsafe;
 }
 
 use mod_with_some_unsafe_things::Unsafe as LieAboutModSafety;

tests/ui/unused_self.rs

@@ -5,7 +5,7 @@ mod unused_self {
     use std::pin::Pin;
     use std::sync::{Arc, Mutex};
 
-    struct A {}
+    struct A;
 
     impl A {
         fn unused_self_move(self) {}
@@ -27,7 +27,7 @@ mod unused_self {
 }
 
 mod unused_self_allow {
-    struct A {}
+    struct A;
 
     impl A {
         // shouldn't trigger
@@ -35,7 +35,7 @@ mod unused_self_allow {
         fn unused_self_move(self) {}
     }
 
-    struct B {}
+    struct B;
 
     // shouldn't trigger
     #[allow(clippy::unused_self)]
@@ -43,7 +43,7 @@ mod unused_self_allow {
         fn unused_self_move(self) {}
     }
 
-    struct C {}
+    struct C;
 
     #[allow(clippy::unused_self)]
     impl C {
@@ -120,7 +120,7 @@ mod used_self {
 mod not_applicable {
     use std::fmt;
 
-    struct A {}
+    struct A;
 
     impl fmt::Debug for A {
         fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {

tests/ui/use_self.fixed

@@ -16,7 +16,7 @@ extern crate proc_macro_derive;
 fn main() {}
 
 mod use_self {
-    struct Foo {}
+    struct Foo;
 
     impl Foo {
         fn new() -> Self {
@@ -35,7 +35,7 @@ mod use_self {
 }
 
 mod better {
-    struct Foo {}
+    struct Foo;
 
     impl Foo {
         fn new() -> Self {
@@ -123,7 +123,7 @@ mod macros {
         };
     }
 
-    struct Foo {}
+    struct Foo;
 
     impl Foo {
         use_self_expand!(); // Should not lint in local macros
@@ -134,7 +134,7 @@ mod macros {
 }
 
 mod nesting {
-    struct Foo {}
+    struct Foo;
     impl Foo {
         fn foo() {
             #[allow(unused_imports)]
@@ -209,7 +209,7 @@ mod issue3410 {
 #[allow(clippy::no_effect, path_statements)]
 mod rustfix {
     mod nested {
-        pub struct A {}
+        pub struct A;
     }
 
     impl nested::A {
@@ -227,7 +227,7 @@ mod rustfix {
 }
 
 mod issue3567 {
-    struct TestStruct {}
+    struct TestStruct;
     impl TestStruct {
         fn from_something() -> Self {
             Self {}
@@ -248,7 +248,7 @@ mod issue3567 {
 mod paths_created_by_lowering {
     use std::ops::Range;
 
-    struct S {}
+    struct S;
 
     impl S {
         const A: usize = 0;
@@ -382,7 +382,7 @@ mod issue4305 {
 }
 
 mod lint_at_item_level {
-    struct Foo {}
+    struct Foo;
 
     #[allow(clippy::use_self)]
     impl Foo {
@@ -400,7 +400,7 @@ mod lint_at_item_level {
 }
 
 mod lint_at_impl_item_level {
-    struct Foo {}
+    struct Foo;
 
     impl Foo {
         #[allow(clippy::use_self)]
@@ -433,8 +433,8 @@ mod issue4734 {
 mod nested_paths {
     use std::convert::Into;
     mod submod {
-        pub struct B {}
-        pub struct C {}
+        pub struct B;
+        pub struct C;
 
         impl Into<C> for B {
             fn into(self) -> C {

tests/ui/use_self.rs

@@ -16,7 +16,7 @@ extern crate proc_macro_derive;
 fn main() {}
 
 mod use_self {
-    struct Foo {}
+    struct Foo;
 
     impl Foo {
         fn new() -> Foo {
@@ -35,7 +35,7 @@ mod use_self {
 }
 
 mod better {
-    struct Foo {}
+    struct Foo;
 
     impl Foo {
         fn new() -> Self {
@@ -123,7 +123,7 @@ mod macros {
         };
     }
 
-    struct Foo {}
+    struct Foo;
 
     impl Foo {
         use_self_expand!(); // Should not lint in local macros
@@ -134,7 +134,7 @@ mod macros {
 }
 
 mod nesting {
-    struct Foo {}
+    struct Foo;
     impl Foo {
         fn foo() {
             #[allow(unused_imports)]
@@ -209,7 +209,7 @@ mod issue3410 {
 #[allow(clippy::no_effect, path_statements)]
 mod rustfix {
     mod nested {
-        pub struct A {}
+        pub struct A;
     }
 
     impl nested::A {
@@ -227,7 +227,7 @@ mod rustfix {
 }
 
 mod issue3567 {
-    struct TestStruct {}
+    struct TestStruct;
     impl TestStruct {
         fn from_something() -> Self {
             Self {}
@@ -248,7 +248,7 @@ mod issue3567 {
 mod paths_created_by_lowering {
     use std::ops::Range;
 
-    struct S {}
+    struct S;
 
     impl S {
         const A: usize = 0;
@@ -382,7 +382,7 @@ mod issue4305 {
 }
 
 mod lint_at_item_level {
-    struct Foo {}
+    struct Foo;
 
     #[allow(clippy::use_self)]
     impl Foo {
@@ -400,7 +400,7 @@ mod lint_at_item_level {
 }
 
 mod lint_at_impl_item_level {
-    struct Foo {}
+    struct Foo;
 
     impl Foo {
         #[allow(clippy::use_self)]
@@ -433,8 +433,8 @@ mod issue4734 {
 mod nested_paths {
     use std::convert::Into;
     mod submod {
-        pub struct B {}
-        pub struct C {}
+        pub struct B;
+        pub struct C;
 
         impl Into<C> for B {
             fn into(self) -> C {

tests/ui/useless_attribute.fixed

@@ -42,7 +42,7 @@ mod a {
     mod b {
         #[allow(dead_code)]
         #[allow(unreachable_pub)]
-        pub struct C {}
+        pub struct C;
     }
 
     #[allow(unreachable_pub)]

tests/ui/useless_attribute.rs

@@ -42,7 +42,7 @@ mod a {
     mod b {
         #[allow(dead_code)]
         #[allow(unreachable_pub)]
-        pub struct C {}
+        pub struct C;
     }
 
     #[allow(unreachable_pub)]