[Issue 11178] Class may implement same interface multiple times with different interface pointers, breaking (a is b) semantics

[d-bugmail at puremagic.com]

https://d.puremagic.com/issues/show_bug.cgi?id=11178


Iain Buclaw <ibuclaw at ubuntu.com> changed:

           What    |Removed                     |Added
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                 CC|                            |ibuclaw at ubuntu.com


--- Comment #1 from Iain Buclaw <ibuclaw at ubuntu.com> 2013-11-17 07:55:43 PST ---
Pasting in test case in comments just incase gist.github removes the pastebin.
=)


module testcase;

import std.stdio;

interface I1 { }
interface I2 : I1 { }

class C1 : I2 {
void foo() {
writefln("These should REALLY not be the same:");
writefln(": %s", cast(void*) cast(I2) cast(I1) this);
writefln(": %s", cast(void*) cast(I2) this);
writefln("for comparison");
Object obj = cast(Object) this;
writefln(": %s", cast(void*) cast(I2) cast(I1) obj);
writefln(": %s", cast(void*) cast(I2) obj);
}
}
class C2 : C1, I2 { }

void main() {
(new C2).foo();
}

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