https://issues.dlang.org/show_bug.cgi?id=12607
Issue ID: 12607
Summary: IUnknown classes cannot define or override a toString
method
Product: D
Version: D2
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P1
Component: DMD
Assignee: [email protected]
Reporter: [email protected]
Test 1:
-----
import core.sys.windows.windows;
import std.c.windows.com;
class C : IUnknown
{
string toString() { return "E"; }
extern(Windows) HRESULT QueryInterface(const(IID)*, void**) { return
typeof(return).init; }
extern(Windows) uint AddRef() { return 0; }
extern(Windows) uint Release() { return 0; }
}
void main() { }
-----
$ dmd test.d
> Deprecation: class test.C use of object.Object.toString() hidden by C is
> deprecated. Use 'alias Object.toString toString;' to introduce base class
> overload set.
Test 2:
-----
import core.sys.windows.windows;
import std.c.windows.com;
class C : IUnknown
{
override string toString() { return "E"; }
extern(Windows) HRESULT QueryInterface(const(IID)*, void**) { return
typeof(return).init; }
extern(Windows) uint AddRef() { return 0; }
extern(Windows) uint Release() { return 0; }
}
void main() { }
-----
$ dmd test.d
> Error: function test.C.toString does not override any function, did you mean
> to override 'object.Object.toString'?
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