Mark all vtable functions as unsafe extern "C"

src/codegen/mod.rs

@@ -1082,7 +1082,7 @@ impl<'a> CodeGenerator for Vtable<'a> {
                     };
 
                     Some(quote! {
-                        pub #function_name : fn( #( #args ),* ) #ret
+                        pub #function_name : unsafe extern "C" fn( #( #args ),* ) #ret
                     })
                 })
                 .collect::<Vec<_>>();

tests/expectations/tests/enum_and_vtable_mangling.rs

@@ -15,7 +15,7 @@ pub enum _bindgen_ty_1 {
 }
 #[repr(C)]
 pub struct C__bindgen_vtable {
-    pub C_match: fn(this: &mut C),
+    pub C_match: unsafe extern "C" fn(this: &mut C),
 }
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]

tests/expectations/tests/nested_vtable.rs

@@ -8,7 +8,7 @@
 #[repr(C)]
 pub struct nsISupports__bindgen_vtable {
     pub nsISupports_QueryInterface:
-        fn(this: &mut nsISupports) -> *mut nsISupports,
+        unsafe extern "C" fn(this: &mut nsISupports) -> *mut nsISupports,
 }
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]

tests/expectations/tests/ref_argument_array.rs

@@ -8,8 +8,10 @@
 pub const NSID_LENGTH: u32 = 10;
 #[repr(C)]
 pub struct nsID__bindgen_vtable {
-    pub nsID_ToProvidedString:
-        fn(this: &mut nsID, aDest: *mut [::std::os::raw::c_char; 10usize]),
+    pub nsID_ToProvidedString: unsafe extern "C" fn(
+        this: &mut nsID,
+        aDest: *mut [::std::os::raw::c_char; 10usize],
+    ),
 }
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]

tests/expectations/tests/virtual_interface.rs

@@ -7,9 +7,11 @@
 
 #[repr(C)]
 pub struct PureVirtualIFace__bindgen_vtable {
-    pub PureVirtualIFace_Foo: fn(this: &mut PureVirtualIFace),
-    pub PureVirtualIFace_Bar:
-        fn(this: &mut PureVirtualIFace, arg1: ::std::os::raw::c_uint),
+    pub PureVirtualIFace_Foo: unsafe extern "C" fn(this: &mut PureVirtualIFace),
+    pub PureVirtualIFace_Bar: unsafe extern "C" fn(
+        this: &mut PureVirtualIFace,
+        arg1: ::std::os::raw::c_uint,
+    ),
 }
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
@@ -40,7 +42,7 @@ impl Default for PureVirtualIFace {
 }
 #[repr(C)]
 pub struct AnotherInterface__bindgen_vtable {
-    pub AnotherInterface_Baz: fn(this: &mut AnotherInterface),
+    pub AnotherInterface_Baz: unsafe extern "C" fn(this: &mut AnotherInterface),
 }
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]

tests/expectations/tests/virtual_overloaded.rs

@@ -7,8 +7,10 @@
 
 #[repr(C)]
 pub struct C__bindgen_vtable {
-    pub C_do_thing: fn(this: &mut C, arg1: ::std::os::raw::c_char),
-    pub C_do_thing1: fn(this: &mut C, arg1: ::std::os::raw::c_int),
+    pub C_do_thing:
+        unsafe extern "C" fn(this: &mut C, arg1: ::std::os::raw::c_char),
+    pub C_do_thing1:
+        unsafe extern "C" fn(this: &mut C, arg1: ::std::os::raw::c_int),
 }
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]

tests/expectations/tests/vtable_recursive_sig.rs

@@ -7,7 +7,7 @@
 
 #[repr(C)]
 pub struct Base__bindgen_vtable {
-    pub Base_AsDerived: fn(this: &mut Base) -> *mut Derived,
+    pub Base_AsDerived: unsafe extern "C" fn(this: &mut Base) -> *mut Derived,
 }
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]