[Issue 21392] New: extern(C++) No support for virtual inheritance ABI
d-bugmail at puremagic.com
d-bugmail at puremagic.com
Sat Nov 14 18:20:01 UTC 2020
https://issues.dlang.org/show_bug.cgi?id=21392
Issue ID: 21392
Summary: extern(C++) No support for virtual inheritance ABI
Product: D
Version: D2
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P1
Component: dmd
Assignee: nobody at puremagic.com
Reporter: ibuclaw at gdcproject.org
Example program
---
#include <stdio.h>
struct A {
virtual void f2 () {};
virtual void f3 () {};
};
struct B : virtual public A {
virtual void f3 () {};
};
struct C : public A, public B {
virtual void f4 () {};
};
struct D : virtual public B, virtual public C, virtual public A
{
virtual void f2 () { };
virtual void f3 () { printf("this = %p\n", this); }
virtual void f4 () { };
virtual void f5 () { };
virtual void f6 () { };
};
D *makeD()
{
return new D;
}
---
extern(C++, struct)
{
interface A {
void f2();
void f3();
}
interface B : A {
void f3();
}
interface C : A, B {
void f4();
}
interface D : B, C, A
{
void f2();
void f3();
void f4();
void f5();
void f6();
}
D makeD();
}
int main()
{
C c = makeD();
(cast(B)c).f3(); // !!! SEGV !!!
return 0;
}
---
--
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