Auto merge of #1228 - emilio:repr-c-enums, r=fitzgen

codegen: Don't generate repr(C) for enums.

That's only undefined for enums with fields.

Fixes #1224
See also: https://botbot.me/mozilla/rustc/2018-01-19/?msg=95934948&page=2

45 files changed, 1 insertions, 172 deletions

diff --git a/src/codegen/mod.rs b/src/codegen/mod.rs
index 16ff79fb..5641b84d 100644
--- a/src/codegen/mod.rs
+++ b/src/codegen/mod.rs
@@ -2442,9 +2442,7 @@ impl CodeGenerator for Enum {
         // TODO(emilio): Delegate this to the builders?
         if variation.is_rust() {
             attrs.push(attributes::repr(repr_name));
-        }
-
-        if variation.is_bitfield() || variation.is_rust() {
+        } else if variation.is_bitfield() {
             attrs.push(attributes::repr("C"));
         }
 
diff --git a/tests/expectations/tests/anon_enum.rs b/tests/expectations/tests/anon_enum.rs
index c482530c..76d6089f 100644
--- a/tests/expectations/tests/anon_enum.rs
+++ b/tests/expectations/tests/anon_enum.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 #[derive(Debug, Default, Copy, Clone, PartialEq)]
 pub struct Test {
@@ -12,7 +10,6 @@ pub struct Test {
 }
 pub const Test_T_NONE: Test__bindgen_ty_1 = Test__bindgen_ty_1::T_NONE;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Test__bindgen_ty_1 {
     T_NONE = 0,
@@ -41,7 +38,6 @@ fn bindgen_test_layout_Test() {
     );
 }
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Baz {
     Foo = 0,
diff --git a/tests/expectations/tests/anon_enum_trait.rs b/tests/expectations/tests/anon_enum_trait.rs
index 21d22879..6eb9f440 100644
--- a/tests/expectations/tests/anon_enum_trait.rs
+++ b/tests/expectations/tests/anon_enum_trait.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 #[derive(Debug, Default, Copy, Clone, Hash, PartialEq, Eq)]
 pub struct DataType {
@@ -19,7 +17,6 @@ pub const DataType_channels: DataType__bindgen_ty_1 = DataType__bindgen_ty_1::ge
 pub const DataType_fmt: DataType__bindgen_ty_1 = DataType__bindgen_ty_1::generic_type;
 pub const DataType_type_: DataType__bindgen_ty_1 = DataType__bindgen_ty_1::generic_type;
 #[repr(i32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum DataType__bindgen_ty_1 {
     generic_type = 0,
@@ -32,7 +29,6 @@ pub struct Foo {
 pub const Foo_Bar: Foo__bindgen_ty_1 = Foo__bindgen_ty_1::Bar;
 pub const Foo_Baz: Foo__bindgen_ty_1 = Foo__bindgen_ty_1::Bar;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Foo__bindgen_ty_1 {
     Bar = 0,
diff --git a/tests/expectations/tests/anon_enum_whitelist.rs b/tests/expectations/tests/anon_enum_whitelist.rs
index 45b858fd..267d9229 100644
--- a/tests/expectations/tests/anon_enum_whitelist.rs
+++ b/tests/expectations/tests/anon_enum_whitelist.rs
@@ -1,13 +1,10 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 pub const NODE_FLAG_FOO: _bindgen_ty_1 = _bindgen_ty_1::NODE_FLAG_FOO;
 pub const NODE_FLAG_BAR: _bindgen_ty_1 = _bindgen_ty_1::NODE_FLAG_BAR;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum _bindgen_ty_1 {
     NODE_FLAG_FOO = 0,
diff --git a/tests/expectations/tests/anon_union.rs b/tests/expectations/tests/anon_union.rs
index da990ae9..68927914 100644
--- a/tests/expectations/tests/anon_union.rs
+++ b/tests/expectations/tests/anon_union.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 pub struct TErrorResult {
     pub mResult: ::std::os::raw::c_int,
@@ -14,7 +12,6 @@ pub struct TErrorResult {
 pub const TErrorResult_UnionState_HasException: TErrorResult_UnionState =
     TErrorResult_UnionState::HasMessage;
 #[repr(i32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum TErrorResult_UnionState {
     HasMessage = 0,
diff --git a/tests/expectations/tests/anon_union_1_0.rs b/tests/expectations/tests/anon_union_1_0.rs
index 67a332c0..80111b90 100644
--- a/tests/expectations/tests/anon_union_1_0.rs
+++ b/tests/expectations/tests/anon_union_1_0.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 pub struct __BindgenUnionField<T>(::std::marker::PhantomData<T>);
 impl<T> __BindgenUnionField<T> {
@@ -58,7 +56,6 @@ pub struct TErrorResult {
 pub const TErrorResult_UnionState_HasException: TErrorResult_UnionState =
     TErrorResult_UnionState::HasMessage;
 #[repr(i32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum TErrorResult_UnionState {
     HasMessage = 0,
diff --git a/tests/expectations/tests/bitfield_align_2.rs b/tests/expectations/tests/bitfield_align_2.rs
index 5174d1aa..5d63699d 100644
--- a/tests/expectations/tests/bitfield_align_2.rs
+++ b/tests/expectations/tests/bitfield_align_2.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 #[derive(Copy, Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct __BindgenBitfieldUnit<Storage, Align>
@@ -84,7 +82,6 @@ where
     }
 }
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum MyEnum {
     ONE = 0,
diff --git a/tests/expectations/tests/class_with_inner_struct.rs b/tests/expectations/tests/class_with_inner_struct.rs
index f6560125..265d7c5b 100644
--- a/tests/expectations/tests/class_with_inner_struct.rs
+++ b/tests/expectations/tests/class_with_inner_struct.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 #[derive(Copy, Clone)]
 pub struct A {
@@ -214,7 +212,6 @@ fn bindgen_test_layout_B() {
     );
 }
 #[repr(i32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum StepSyntax {
     Keyword = 0,
diff --git a/tests/expectations/tests/class_with_inner_struct_1_0.rs b/tests/expectations/tests/class_with_inner_struct_1_0.rs
index e8072362..a2c01b4e 100644
--- a/tests/expectations/tests/class_with_inner_struct_1_0.rs
+++ b/tests/expectations/tests/class_with_inner_struct_1_0.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 pub struct __BindgenUnionField<T>(::std::marker::PhantomData<T>);
 impl<T> __BindgenUnionField<T> {
@@ -272,7 +270,6 @@ impl Clone for B {
     }
 }
 #[repr(i32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum StepSyntax {
     Keyword = 0,
diff --git a/tests/expectations/tests/const_enum_unnamed.rs b/tests/expectations/tests/const_enum_unnamed.rs
index 833f8351..6b04c7dd 100644
--- a/tests/expectations/tests/const_enum_unnamed.rs
+++ b/tests/expectations/tests/const_enum_unnamed.rs
@@ -1,13 +1,10 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 pub const FOO_BAR: _bindgen_ty_1 = _bindgen_ty_1::FOO_BAR;
 pub const FOO_BAZ: _bindgen_ty_1 = _bindgen_ty_1::FOO_BAZ;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum _bindgen_ty_1 {
     FOO_BAR = 0,
@@ -20,7 +17,6 @@ pub struct Foo {
 }
 pub const Foo_FOO_BAR: Foo__bindgen_ty_1 = Foo__bindgen_ty_1::FOO_BAR;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Foo__bindgen_ty_1 {
     FOO_BAR = 10,
diff --git a/tests/expectations/tests/constify-enum.rs b/tests/expectations/tests/constify-enum.rs
index 79fc4dff..dd46e085 100644
--- a/tests/expectations/tests/constify-enum.rs
+++ b/tests/expectations/tests/constify-enum.rs
@@ -1,15 +1,12 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 pub const nsCSSPropertyID_eCSSProperty_COUNT_unexistingVariantValue: nsCSSPropertyID =
     nsCSSPropertyID::eCSSProperty_COUNT_unexistingVariantValue;
 pub const nsCSSPropertyID_eCSSProperty_COUNT: nsCSSPropertyID =
     nsCSSPropertyID::eCSSPropertyAlias_aa;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum nsCSSPropertyID {
     eCSSProperty_a = 0,
diff --git a/tests/expectations/tests/empty-enum.rs b/tests/expectations/tests/empty-enum.rs
index 4ec7df8a..99ffc27e 100644
--- a/tests/expectations/tests/empty-enum.rs
+++ b/tests/expectations/tests/empty-enum.rs
@@ -1,12 +1,9 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 pub type EmptyConstified = ::std::os::raw::c_uint;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum EmptyRustified {
     __bindgen_cannot_repr_c_on_empty_enum = 0,
@@ -15,7 +12,6 @@ pub mod EmptyModule {
     pub type Type = ::std::os::raw::c_uint;
 }
 #[repr(i8)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum EmptyClassRustified {
     __bindgen_cannot_repr_c_on_empty_enum = 0,
@@ -25,7 +21,6 @@ pub mod EmptyClassModule {
     pub type Type = ::std::os::raw::c_char;
 }
 #[repr(i8)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum ForwardClassRustified {
     __bindgen_cannot_repr_c_on_empty_enum = 0,
diff --git a/tests/expectations/tests/enum.rs b/tests/expectations/tests/enum.rs
index b1920aae..2ed5d187 100644
--- a/tests/expectations/tests/enum.rs
+++ b/tests/expectations/tests/enum.rs
@@ -1,18 +1,14 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Foo {
     Bar = 0,
     Qux = 1,
 }
 #[repr(i32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Neg {
     MinusOne = -1,
diff --git a/tests/expectations/tests/enum_alias.rs b/tests/expectations/tests/enum_alias.rs
index cde429f7..30a4f62a 100644
--- a/tests/expectations/tests/enum_alias.rs
+++ b/tests/expectations/tests/enum_alias.rs
@@ -1,11 +1,8 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(u8)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Bar {
     VAL = 0,
diff --git a/tests/expectations/tests/enum_and_vtable_mangling.rs b/tests/expectations/tests/enum_and_vtable_mangling.rs
index 42ee3832..76e28aaf 100644
--- a/tests/expectations/tests/enum_and_vtable_mangling.rs
+++ b/tests/expectations/tests/enum_and_vtable_mangling.rs
@@ -1,13 +1,10 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 pub const match_: _bindgen_ty_1 = _bindgen_ty_1::match_;
 pub const whatever_else: _bindgen_ty_1 = _bindgen_ty_1::whatever_else;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum _bindgen_ty_1 {
     match_ = 0,
diff --git a/tests/expectations/tests/enum_dupe.rs b/tests/expectations/tests/enum_dupe.rs
index 151b2cd0..29bd7502 100644
--- a/tests/expectations/tests/enum_dupe.rs
+++ b/tests/expectations/tests/enum_dupe.rs
@@ -1,12 +1,9 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 pub const Foo_Dupe: Foo = Foo::Bar;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Foo {
     Bar = 1,
diff --git a/tests/expectations/tests/enum_explicit_type.rs b/tests/expectations/tests/enum_explicit_type.rs
index 644a1cea..17f135b3 100644
--- a/tests/expectations/tests/enum_explicit_type.rs
+++ b/tests/expectations/tests/enum_explicit_type.rs
@@ -1,44 +1,36 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(u8)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Foo {
     Bar = 0,
     Qux = 1,
 }
 #[repr(i8)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Neg {
     MinusOne = -1,
     One = 1,
 }
 #[repr(u16)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Bigger {
     Much = 255,
     Larger = 256,
 }
 #[repr(i64)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum MuchLong {
     MuchLow = -4294967296,
 }
 #[repr(i64)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum MuchLongLong {
     I64_MIN = -9223372036854775808,
 }
 #[repr(u64)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum MuchULongLong {
     MuchHigh = 4294967296,
diff --git a/tests/expectations/tests/enum_in_template_with_typedef.rs b/tests/expectations/tests/enum_in_template_with_typedef.rs
index 588bb42b..a3b4e776 100644
--- a/tests/expectations/tests/enum_in_template_with_typedef.rs
+++ b/tests/expectations/tests/enum_in_template_with_typedef.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 #[derive(Debug, Default, Copy, Clone)]
 pub struct std_fbstring_core {
@@ -13,7 +11,6 @@ pub type std_fbstring_core_category_type = u8;
 pub const std_fbstring_core_Category_Bar: std_fbstring_core_Category =
     std_fbstring_core_Category::Foo;
 #[repr(u8)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum std_fbstring_core_Category {
     Foo = 0,
diff --git a/tests/expectations/tests/enum_negative.rs b/tests/expectations/tests/enum_negative.rs
index 1fe2f6a4..e066968d 100644
--- a/tests/expectations/tests/enum_negative.rs
+++ b/tests/expectations/tests/enum_negative.rs
@@ -1,11 +1,8 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(i32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Foo {
     Bar = -2,
diff --git a/tests/expectations/tests/enum_packed.rs b/tests/expectations/tests/enum_packed.rs
index d8e96b0f..d388b5ed 100644
--- a/tests/expectations/tests/enum_packed.rs
+++ b/tests/expectations/tests/enum_packed.rs
@@ -1,25 +1,20 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(u8)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Foo {
     Bar = 0,
     Qux = 1,
 }
 #[repr(i8)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Neg {
     MinusOne = -1,
     One = 1,
 }
 #[repr(u16)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Bigger {
     Much = 255,
diff --git a/tests/expectations/tests/forward-enum-decl.rs b/tests/expectations/tests/forward-enum-decl.rs
index c2dea97a..d327cb72 100644
--- a/tests/expectations/tests/forward-enum-decl.rs
+++ b/tests/expectations/tests/forward-enum-decl.rs
@@ -1,11 +1,8 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(i32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum CSSPseudoClassType {
     empty = 0,
diff --git a/tests/expectations/tests/func_ptr_in_struct.rs b/tests/expectations/tests/func_ptr_in_struct.rs
index 33d908e2..d66ce84d 100644
--- a/tests/expectations/tests/func_ptr_in_struct.rs
+++ b/tests/expectations/tests/func_ptr_in_struct.rs
@@ -1,11 +1,8 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(i32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum baz {
     __bindgen_cannot_repr_c_on_empty_enum = 0,
diff --git a/tests/expectations/tests/issue-372.rs b/tests/expectations/tests/issue-372.rs
index f9040a99..a146573b 100644
--- a/tests/expectations/tests/issue-372.rs
+++ b/tests/expectations/tests/issue-372.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[allow(non_snake_case, non_camel_case_types, non_upper_case_globals)]
 pub mod root {
     #[allow(unused_imports)]
@@ -77,7 +75,6 @@ pub mod root {
         }
     }
     #[repr(u32)]
-    #[repr(C)]
     #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
     pub enum n {
         o = 0,
diff --git a/tests/expectations/tests/issue-410.rs b/tests/expectations/tests/issue-410.rs
index f23462bf..e1ce9df5 100644
--- a/tests/expectations/tests/issue-410.rs
+++ b/tests/expectations/tests/issue-410.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[allow(non_snake_case, non_camel_case_types, non_upper_case_globals)]
 pub mod root {
     #[allow(unused_imports)]
@@ -41,7 +39,6 @@ pub mod root {
         }
     }
     #[repr(u32)]
-    #[repr(C)]
     #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
     pub enum JSWhyMagic {
         __bindgen_cannot_repr_c_on_empty_enum = 0,
diff --git a/tests/expectations/tests/issue-493.rs b/tests/expectations/tests/issue-493.rs
index d338e30c..69003faf 100644
--- a/tests/expectations/tests/issue-493.rs
+++ b/tests/expectations/tests/issue-493.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 pub struct __BindgenUnionField<T>(::std::marker::PhantomData<T>);
 impl<T> __BindgenUnionField<T> {
@@ -70,7 +68,6 @@ impl Default for basic_string___long {
 pub const basic_string___min_cap: basic_string__bindgen_ty_1 =
     basic_string__bindgen_ty_1::__min_cap;
 #[repr(i32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum basic_string__bindgen_ty_1 {
     __min_cap = 0,
@@ -110,7 +107,6 @@ impl Default for basic_string___ulx {
 pub const basic_string___n_words: basic_string__bindgen_ty_2 =
     basic_string__bindgen_ty_2::__n_words;
 #[repr(i32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum basic_string__bindgen_ty_2 {
     __n_words = 0,
diff --git a/tests/expectations/tests/issue-493_1_0.rs b/tests/expectations/tests/issue-493_1_0.rs
index 4dfc26d8..a65cd3e8 100644
--- a/tests/expectations/tests/issue-493_1_0.rs
+++ b/tests/expectations/tests/issue-493_1_0.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 pub struct __BindgenUnionField<T>(::std::marker::PhantomData<T>);
 impl<T> __BindgenUnionField<T> {
@@ -70,7 +68,6 @@ impl Default for basic_string___long {
 pub const basic_string___min_cap: basic_string__bindgen_ty_1 =
     basic_string__bindgen_ty_1::__min_cap;
 #[repr(i32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum basic_string__bindgen_ty_1 {
     __min_cap = 0,
@@ -108,7 +105,6 @@ impl Default for basic_string___ulx {
 pub const basic_string___n_words: basic_string__bindgen_ty_2 =
     basic_string__bindgen_ty_2::__n_words;
 #[repr(i32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum basic_string__bindgen_ty_2 {
     __n_words = 0,
diff --git a/tests/expectations/tests/issue-569-non-type-template-params-causing-layout-test-failures.rs b/tests/expectations/tests/issue-569-non-type-template-params-causing-layout-test-failures.rs
index 3029a670..1119b7e7 100644
--- a/tests/expectations/tests/issue-569-non-type-template-params-causing-layout-test-failures.rs
+++ b/tests/expectations/tests/issue-569-non-type-template-params-causing-layout-test-failures.rs
@@ -1,13 +1,10 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 pub const ENUM_VARIANT_1: _bindgen_ty_1 = _bindgen_ty_1::ENUM_VARIANT_1;
 pub const ENUM_VARIANT_2: _bindgen_ty_1 = _bindgen_ty_1::ENUM_VARIANT_2;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum _bindgen_ty_1 {
     ENUM_VARIANT_1 = 0,
diff --git a/tests/expectations/tests/issue-888-enum-var-decl-jump.rs b/tests/expectations/tests/issue-888-enum-var-decl-jump.rs
index c0ac112d..df48ae24 100644
--- a/tests/expectations/tests/issue-888-enum-var-decl-jump.rs
+++ b/tests/expectations/tests/issue-888-enum-var-decl-jump.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[allow(non_snake_case, non_camel_case_types, non_upper_case_globals)]
 pub mod root {
     #[allow(unused_imports)]
@@ -35,7 +33,6 @@ pub mod root {
         }
     }
     #[repr(u32)]
-    #[repr(C)]
     #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
     pub enum a {
         __bindgen_cannot_repr_c_on_empty_enum = 0,
diff --git a/tests/expectations/tests/jsval_layout_opaque.rs b/tests/expectations/tests/jsval_layout_opaque.rs
index 2b2d0d77..fa4999ca 100644
--- a/tests/expectations/tests/jsval_layout_opaque.rs
+++ b/tests/expectations/tests/jsval_layout_opaque.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 #[derive(Copy, Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct __BindgenBitfieldUnit<Storage, Align>
@@ -87,7 +85,6 @@ pub const JSVAL_TAG_SHIFT: ::std::os::raw::c_uint = 47;
 pub const JSVAL_PAYLOAD_MASK: ::std::os::raw::c_ulonglong = 140737488355327;
 pub const JSVAL_TAG_MASK: ::std::os::raw::c_longlong = -140737488355328;
 #[repr(u8)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum JSValueType {
     JSVAL_TYPE_DOUBLE = 0,
@@ -103,7 +100,6 @@ pub enum JSValueType {
     JSVAL_TYPE_MISSING = 33,
 }
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum JSValueTag {
     JSVAL_TAG_MAX_DOUBLE = 131056,
@@ -117,7 +113,6 @@ pub enum JSValueTag {
     JSVAL_TAG_OBJECT = 131064,
 }
 #[repr(u64)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum JSValueShiftedTag {
     JSVAL_SHIFTED_TAG_MAX_DOUBLE = 18444492278190833663,
@@ -131,7 +126,6 @@ pub enum JSValueShiftedTag {
     JSVAL_SHIFTED_TAG_OBJECT = 18445618173802708992,
 }
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum JSWhyMagic {
     JS_ELEMENTS_HOLE = 0,
diff --git a/tests/expectations/tests/jsval_layout_opaque_1_0.rs b/tests/expectations/tests/jsval_layout_opaque_1_0.rs
index ab11a231..dc41c49c 100644
--- a/tests/expectations/tests/jsval_layout_opaque_1_0.rs
+++ b/tests/expectations/tests/jsval_layout_opaque_1_0.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 #[derive(Copy, Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct __BindgenBitfieldUnit<Storage, Align>
@@ -130,7 +128,6 @@ pub const JSVAL_TAG_SHIFT: ::std::os::raw::c_uint = 47;
 pub const JSVAL_PAYLOAD_MASK: ::std::os::raw::c_ulonglong = 140737488355327;
 pub const JSVAL_TAG_MASK: ::std::os::raw::c_longlong = -140737488355328;
 #[repr(u8)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum JSValueType {
     JSVAL_TYPE_DOUBLE = 0,
@@ -146,7 +143,6 @@ pub enum JSValueType {
     JSVAL_TYPE_MISSING = 33,
 }
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum JSValueTag {
     JSVAL_TAG_MAX_DOUBLE = 131056,
@@ -160,7 +156,6 @@ pub enum JSValueTag {
     JSVAL_TAG_OBJECT = 131064,
 }
 #[repr(u64)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum JSValueShiftedTag {
     JSVAL_SHIFTED_TAG_MAX_DOUBLE = 18444492278190833663,
@@ -174,7 +169,6 @@ pub enum JSValueShiftedTag {
     JSVAL_SHIFTED_TAG_OBJECT = 18445618173802708992,
 }
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum JSWhyMagic {
     JS_ELEMENTS_HOLE = 0,
diff --git a/tests/expectations/tests/layout_array_too_long.rs b/tests/expectations/tests/layout_array_too_long.rs
index 59884451..bb98704f 100644
--- a/tests/expectations/tests/layout_array_too_long.rs
+++ b/tests/expectations/tests/layout_array_too_long.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 pub const RTE_CACHE_LINE_SIZE: ::std::os::raw::c_uint = 64;
 pub const RTE_LIBRTE_IP_FRAG_MAX_FRAG: ::std::os::raw::c_uint = 4;
 pub const IP_LAST_FRAG_IDX: _bindgen_ty_1 = _bindgen_ty_1::IP_LAST_FRAG_IDX;
@@ -11,7 +9,6 @@ pub const IP_FIRST_FRAG_IDX: _bindgen_ty_1 = _bindgen_ty_1::IP_FIRST_FRAG_IDX;
 pub const IP_MIN_FRAG_NUM: _bindgen_ty_1 = _bindgen_ty_1::IP_MIN_FRAG_NUM;
 pub const IP_MAX_FRAG_NUM: _bindgen_ty_1 = _bindgen_ty_1::IP_MAX_FRAG_NUM;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum _bindgen_ty_1 {
     IP_LAST_FRAG_IDX = 0,
diff --git a/tests/expectations/tests/layout_cmdline_token.rs b/tests/expectations/tests/layout_cmdline_token.rs
index 2cde7c42..d583e641 100644
--- a/tests/expectations/tests/layout_cmdline_token.rs
+++ b/tests/expectations/tests/layout_cmdline_token.rs
@@ -1,10 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
-
 /// Stores a pointer to the ops struct, and the offset: the place to
 /// write the parsed result in the destination structure.
 #[repr(C)]
@@ -166,7 +163,6 @@ impl Default for cmdline_token_ops {
     }
 }
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum cmdline_numtype {
     UINT8 = 0,
diff --git a/tests/expectations/tests/layout_eth_conf.rs b/tests/expectations/tests/layout_eth_conf.rs
index 599f9788..176e0d55 100644
--- a/tests/expectations/tests/layout_eth_conf.rs
+++ b/tests/expectations/tests/layout_eth_conf.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 #[derive(Copy, Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct __BindgenBitfieldUnit<Storage, Align>
@@ -116,7 +114,6 @@ pub const RTE_ETH_FLOW_GENEVE: ::std::os::raw::c_uint = 20;
 pub const RTE_ETH_FLOW_NVGRE: ::std::os::raw::c_uint = 21;
 pub const RTE_ETH_FLOW_MAX: ::std::os::raw::c_uint = 22;
 #[repr(u32)]
-#[repr(C)]
 /// A set of values to identify what method is to be used to route
 /// packets to multiple queues.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
@@ -344,7 +341,6 @@ impl rte_eth_rxmode {
     }
 }
 #[repr(u32)]
-#[repr(C)]
 /// A set of values to identify what method is to be used to transmit
 /// packets using multi-TCs.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
@@ -534,7 +530,6 @@ impl Default for rte_eth_rss_conf {
     }
 }
 #[repr(u32)]
-#[repr(C)]
 /// This enum indicates the possible number of traffic classes
 /// in DCB configratioins
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
@@ -543,7 +538,6 @@ pub enum rte_eth_nb_tcs {
     ETH_8_TCS = 8,
 }
 #[repr(u32)]
-#[repr(C)]
 /// This enum indicates the possible number of queue pools
 /// in VMDQ configurations.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
@@ -1058,7 +1052,6 @@ impl Default for rte_eth_vmdq_rx_conf {
     }
 }
 #[repr(u32)]
-#[repr(C)]
 /// Flow Director setting modes: none, signature or perfect.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum rte_fdir_mode {
@@ -1069,7 +1062,6 @@ pub enum rte_fdir_mode {
     RTE_FDIR_MODE_PERFECT_TUNNEL = 4,
 }
 #[repr(u32)]
-#[repr(C)]
 /// Memory space that can be configured to store Flow Director filters
 /// in the board memory.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
@@ -1079,7 +1071,6 @@ pub enum rte_fdir_pballoc_type {
     RTE_FDIR_PBALLOC_256K = 2,
 }
 #[repr(u32)]
-#[repr(C)]
 /// Select report mode of FDIR hash information in RX descriptors.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum rte_fdir_status_mode {
@@ -1373,7 +1364,6 @@ fn bindgen_test_layout_rte_eth_fdir_masks() {
     );
 }
 #[repr(u32)]
-#[repr(C)]
 /// Payload type
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum rte_eth_payload_type {
diff --git a/tests/expectations/tests/layout_eth_conf_1_0.rs b/tests/expectations/tests/layout_eth_conf_1_0.rs
index 532fcae8..8323460a 100644
--- a/tests/expectations/tests/layout_eth_conf_1_0.rs
+++ b/tests/expectations/tests/layout_eth_conf_1_0.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 #[derive(Copy, Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct __BindgenBitfieldUnit<Storage, Align>
@@ -159,7 +157,6 @@ pub const RTE_ETH_FLOW_GENEVE: ::std::os::raw::c_uint = 20;
 pub const RTE_ETH_FLOW_NVGRE: ::std::os::raw::c_uint = 21;
 pub const RTE_ETH_FLOW_MAX: ::std::os::raw::c_uint = 22;
 #[repr(u32)]
-#[repr(C)]
 /// A set of values to identify what method is to be used to route
 /// packets to multiple queues.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
@@ -392,7 +389,6 @@ impl rte_eth_rxmode {
     }
 }
 #[repr(u32)]
-#[repr(C)]
 /// A set of values to identify what method is to be used to transmit
 /// packets using multi-TCs.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
@@ -592,7 +588,6 @@ impl Default for rte_eth_rss_conf {
     }
 }
 #[repr(u32)]
-#[repr(C)]
 /// This enum indicates the possible number of traffic classes
 /// in DCB configratioins
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
@@ -601,7 +596,6 @@ pub enum rte_eth_nb_tcs {
     ETH_8_TCS = 8,
 }
 #[repr(u32)]
-#[repr(C)]
 /// This enum indicates the possible number of queue pools
 /// in VMDQ configurations.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
@@ -1156,7 +1150,6 @@ impl Default for rte_eth_vmdq_rx_conf {
     }
 }
 #[repr(u32)]
-#[repr(C)]
 /// Flow Director setting modes: none, signature or perfect.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum rte_fdir_mode {
@@ -1167,7 +1160,6 @@ pub enum rte_fdir_mode {
     RTE_FDIR_MODE_PERFECT_TUNNEL = 4,
 }
 #[repr(u32)]
-#[repr(C)]
 /// Memory space that can be configured to store Flow Director filters
 /// in the board memory.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
@@ -1177,7 +1169,6 @@ pub enum rte_fdir_pballoc_type {
     RTE_FDIR_PBALLOC_256K = 2,
 }
 #[repr(u32)]
-#[repr(C)]
 /// Select report mode of FDIR hash information in RX descriptors.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum rte_fdir_status_mode {
@@ -1486,7 +1477,6 @@ impl Clone for rte_eth_fdir_masks {
     }
 }
 #[repr(u32)]
-#[repr(C)]
 /// Payload type
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum rte_eth_payload_type {
diff --git a/tests/expectations/tests/layout_large_align_field.rs b/tests/expectations/tests/layout_large_align_field.rs
index 501e1bce..cbe84e3b 100644
--- a/tests/expectations/tests/layout_large_align_field.rs
+++ b/tests/expectations/tests/layout_large_align_field.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 #[derive(Default)]
 pub struct __IncompleteArrayField<T>(::std::marker::PhantomData<T>);
@@ -48,7 +46,6 @@ pub const IP_FIRST_FRAG_IDX: _bindgen_ty_1 = _bindgen_ty_1::IP_FIRST_FRAG_IDX;
 pub const IP_MIN_FRAG_NUM: _bindgen_ty_1 = _bindgen_ty_1::IP_MIN_FRAG_NUM;
 pub const IP_MAX_FRAG_NUM: _bindgen_ty_1 = _bindgen_ty_1::IP_MAX_FRAG_NUM;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum _bindgen_ty_1 {
     IP_LAST_FRAG_IDX = 0,
diff --git a/tests/expectations/tests/libclang-3.8/constant-evaluate.rs b/tests/expectations/tests/libclang-3.8/constant-evaluate.rs
index 1b6aca15..8faddfe9 100644
--- a/tests/expectations/tests/libclang-3.8/constant-evaluate.rs
+++ b/tests/expectations/tests/libclang-3.8/constant-evaluate.rs
@@ -7,7 +7,6 @@
 pub const foo: _bindgen_ty_1 = _bindgen_ty_1::foo;
 pub const bar: _bindgen_ty_1 = _bindgen_ty_1::bar;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum _bindgen_ty_1 { foo = 4, bar = 8, }
 pub type EasyToOverflow = ::std::os::raw::c_ulonglong;
diff --git a/tests/expectations/tests/libclang-3.9/constant-evaluate.rs b/tests/expectations/tests/libclang-3.9/constant-evaluate.rs
index 76cbf24e..096bc182 100644
--- a/tests/expectations/tests/libclang-3.9/constant-evaluate.rs
+++ b/tests/expectations/tests/libclang-3.9/constant-evaluate.rs
@@ -7,7 +7,6 @@
 pub const foo: _bindgen_ty_1 = _bindgen_ty_1::foo;
 pub const bar: _bindgen_ty_1 = _bindgen_ty_1::bar;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum _bindgen_ty_1 {
     foo = 4,
diff --git a/tests/expectations/tests/libclang-4/constant-evaluate.rs b/tests/expectations/tests/libclang-4/constant-evaluate.rs
index 76cbf24e..51365df5 100644
--- a/tests/expectations/tests/libclang-4/constant-evaluate.rs
+++ b/tests/expectations/tests/libclang-4/constant-evaluate.rs
@@ -1,13 +1,10 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 pub const foo: _bindgen_ty_1 = _bindgen_ty_1::foo;
 pub const bar: _bindgen_ty_1 = _bindgen_ty_1::bar;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum _bindgen_ty_1 {
     foo = 4,
diff --git a/tests/expectations/tests/nsStyleAutoArray.rs b/tests/expectations/tests/nsStyleAutoArray.rs
index 199222ec..bd5e7f4b 100644
--- a/tests/expectations/tests/nsStyleAutoArray.rs
+++ b/tests/expectations/tests/nsStyleAutoArray.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
 pub struct nsTArray<T> {
@@ -23,7 +21,6 @@ pub struct nsStyleAutoArray<T> {
     pub _phantom_0: ::std::marker::PhantomData<::std::cell::UnsafeCell<T>>,
 }
 #[repr(i32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum nsStyleAutoArray_WithSingleInitialElement {
     WITH_SINGLE_INITIAL_ELEMENT = 0,
diff --git a/tests/expectations/tests/overflowed_enum.rs b/tests/expectations/tests/overflowed_enum.rs
index 9104867d..25e91786 100644
--- a/tests/expectations/tests/overflowed_enum.rs
+++ b/tests/expectations/tests/overflowed_enum.rs
@@ -1,11 +1,8 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Foo {
     BAP_ARM = 9698489,
@@ -13,7 +10,6 @@ pub enum Foo {
     BAP_X86_64 = 3128633167,
 }
 #[repr(u16)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Bar {
     One = 1,
diff --git a/tests/expectations/tests/prepend-enum-constified-variant.rs b/tests/expectations/tests/prepend-enum-constified-variant.rs
index afe2c0b1..7f3b6746 100644
--- a/tests/expectations/tests/prepend-enum-constified-variant.rs
+++ b/tests/expectations/tests/prepend-enum-constified-variant.rs
@@ -1,12 +1,9 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 pub const AV_CODEC_ID_TTF: AVCodecID = AVCodecID::AV_CODEC_ID_FIRST_UNKNOWN;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum AVCodecID {
     AV_CODEC_ID_FIRST_UNKNOWN = 98304,
diff --git a/tests/expectations/tests/short-enums.rs b/tests/expectations/tests/short-enums.rs
index 882b368c..a7739f21 100644
--- a/tests/expectations/tests/short-enums.rs
+++ b/tests/expectations/tests/short-enums.rs
@@ -1,23 +1,18 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(u8)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum one_byte_t {
     SOME_VALUE = 1,
 }
 #[repr(u16)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum two_byte_t {
     SOME_OTHER_VALUE = 256,
 }
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum four_byte_t {
     SOME_BIGGER_VALUE = 16777216,
diff --git a/tests/expectations/tests/struct_typedef.rs b/tests/expectations/tests/struct_typedef.rs
index 0e615144..f85aeb4c 100644
--- a/tests/expectations/tests/struct_typedef.rs
+++ b/tests/expectations/tests/struct_typedef.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 #[derive(Debug, Default, Copy, Clone, Hash, PartialEq, Eq)]
 pub struct typedef_named_struct {
@@ -68,14 +66,12 @@ impl Default for _bindgen_ty_1 {
 pub type struct_ptr_t = *mut _bindgen_ty_1;
 pub type struct_ptr_ptr_t = *mut *mut _bindgen_ty_1;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum typedef_named_enum {
     ENUM_HAS_NAME = 1,
 }
 pub const ENUM_IS_ANON: _bindgen_ty_2 = _bindgen_ty_2::ENUM_IS_ANON;
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum _bindgen_ty_2 {
     ENUM_IS_ANON = 0,
diff --git a/tests/expectations/tests/struct_typedef_ns.rs b/tests/expectations/tests/struct_typedef_ns.rs
index cbbdaa7b..79fa38de 100644
--- a/tests/expectations/tests/struct_typedef_ns.rs
+++ b/tests/expectations/tests/struct_typedef_ns.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[allow(non_snake_case, non_camel_case_types, non_upper_case_globals)]
 pub mod root {
     #[allow(unused_imports)]
@@ -40,7 +38,6 @@ pub mod root {
             );
         }
         #[repr(u32)]
-        #[repr(C)]
         #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
         pub enum typedef_enum {
             BAR = 1,
@@ -81,7 +78,6 @@ pub mod root {
         pub const _bindgen_mod_id_12_BAR: root::_bindgen_mod_id_12::_bindgen_ty_2 =
             _bindgen_ty_2::BAR;
         #[repr(u32)]
-        #[repr(C)]
         #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
         pub enum _bindgen_ty_2 {
             BAR = 1,
diff --git a/tests/expectations/tests/weird_bitfields.rs b/tests/expectations/tests/weird_bitfields.rs
index 22cd8ea5..8ab2987c 100644
--- a/tests/expectations/tests/weird_bitfields.rs
+++ b/tests/expectations/tests/weird_bitfields.rs
@@ -1,9 +1,7 @@
 /* automatically generated by rust-bindgen */
 
-
 #![allow(dead_code, non_snake_case, non_camel_case_types, non_upper_case_globals)]
 
-
 #[repr(C)]
 #[derive(Copy, Clone, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct __BindgenBitfieldUnit<Storage, Align>
@@ -84,7 +82,6 @@ where
     }
 }
 #[repr(u32)]
-#[repr(C)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum nsStyleSVGOpacitySource {
     eStyleSVGOpacitySource_Normal = 0,