tests: Add virtual base tests.

Author: emilio

libbindgen/tests/expectations/tests/virtual_inheritance.rs

@@ -0,0 +1,68 @@
+/* automatically generated by rust-bindgen */
+
+
+#![allow(non_snake_case)]
+
+
+#[repr(C)]
+#[derive(Debug, Copy)]
+pub struct A {
+    pub foo: ::std::os::raw::c_int,
+}
+#[test]
+fn bindgen_test_layout_A() {
+    assert_eq!(::std::mem::size_of::<A>() , 4usize);
+    assert_eq!(::std::mem::align_of::<A>() , 4usize);
+}
+impl Clone for A {
+    fn clone(&self) -> Self { *self }
+}
+#[repr(C)]
+pub struct B__bindgen_vtable {
+}
+#[repr(C)]
+#[derive(Debug, Copy)]
+pub struct B {
+    pub vtable_: *const B__bindgen_vtable,
+    pub bar: ::std::os::raw::c_int,
+}
+#[test]
+fn bindgen_test_layout_B() {
+    assert_eq!(::std::mem::size_of::<B>() , 16usize);
+    assert_eq!(::std::mem::align_of::<B>() , 8usize);
+}
+impl Clone for B {
+    fn clone(&self) -> Self { *self }
+}
+#[repr(C)]
+pub struct C__bindgen_vtable {
+}
+#[repr(C)]
+#[derive(Debug, Copy)]
+pub struct C {
+    pub vtable_: *const C__bindgen_vtable,
+    pub baz: ::std::os::raw::c_int,
+}
+#[test]
+fn bindgen_test_layout_C() {
+    assert_eq!(::std::mem::size_of::<C>() , 16usize);
+    assert_eq!(::std::mem::align_of::<C>() , 8usize);
+}
+impl Clone for C {
+    fn clone(&self) -> Self { *self }
+}
+#[repr(C)]
+#[derive(Debug, Copy)]
+pub struct D {
+    pub _base: C,
+    pub _base_1: B,
+    pub bazz: ::std::os::raw::c_int,
+}
+#[test]
+fn bindgen_test_layout_D() {
+    assert_eq!(::std::mem::size_of::<D>() , 40usize);
+    assert_eq!(::std::mem::align_of::<D>() , 8usize);
+}
+impl Clone for D {
+    fn clone(&self) -> Self { *self }
+}

libbindgen/tests/headers/virtual_inheritance.hpp

@@ -0,0 +1,16 @@
+
+class A {
+  int foo;
+};
+
+class B: public virtual A {
+  int bar;
+};
+
+class C: public virtual A {
+  int baz;
+};
+
+class D: public C, public B {
+  int bazz;
+};