Make incomplete array fields copiable.

These aren't extremely great, since this usually requires extra bookkeeping. But
C allows it, so let's keep the same semantics.

Author: emilio

tests/expectations/tests/class.rs

@@ -31,6 +31,11 @@ impl <T> ::std::fmt::Debug for __IncompleteArrayField<T> {
         fmt.write_str("__IncompleteArrayField")
     }
 }
+impl <T> ::std::clone::Clone for __IncompleteArrayField<T> {
+    #[inline]
+    fn clone(&self) -> Self { Self::new() }
+}
+impl <T> ::std::marker::Copy for __IncompleteArrayField<T> { }
 #[repr(C)]
 pub struct __BindgenUnionField<T>(::std::marker::PhantomData<T>);
 impl <T> __BindgenUnionField<T> {
@@ -112,6 +117,16 @@ fn bindgen_test_layout_WithDtor() {
     assert_eq!(::std::mem::align_of::<WithDtor>() , 4usize);
 }
 #[repr(C)]
+pub struct IncompleteArrayNonCopiable {
+    pub whatever: *mut ::std::os::raw::c_void,
+    pub incomplete_array: __IncompleteArrayField<C>,
+}
+#[test]
+fn bindgen_test_layout_IncompleteArrayNonCopiable() {
+    assert_eq!(::std::mem::size_of::<IncompleteArrayNonCopiable>() , 8usize);
+    assert_eq!(::std::mem::align_of::<IncompleteArrayNonCopiable>() , 8usize);
+}
+#[repr(C)]
 #[derive(Debug, Copy)]
 pub struct Union {
     pub d: __BindgenUnionField<f32>,

tests/headers/class.hpp

@@ -32,6 +32,11 @@ class WithDtor {
     ~WithDtor() {}
 };
 
+class IncompleteArrayNonCopiable {
+  void* whatever;
+  C incomplete_array[];
+};
+
 union Union {
     float d;
     int i;