[Issue 15608] New: extern(C++) mangling problem

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15608

          Issue ID: 15608
           Summary: extern(C++) mangling problem
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Windows
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nob...@puremagic.com
          Reporter: turkey...@gmail.com

C++:

class IComponent
{
  virtual Variant CallMethod(String method, Slice<const Variant> args) = 0;
};

class Component : public IComponent
{
  Variant CallMethod(String method, Slice<const Variant> args) override final;
};


D:

extern(C++) interface IComponent
{
  Variant CallMethod(String method, Slice!(const(Variant)) args);
}

extern (C++) class Component : IComponent
{
  final override Variant CallMethod(String method, Slice!(const(Variant))
args);
}


I think override + final is messing up the C++ mangling.

C++:
?CallMethod@Component@ep@@UEAA?AUVariant@2@U?$BaseString@D@2@U?$Slice@$$CBUVariant@ep@@@2@@Z
D:  
?CallMethod@Component@ep@@QEAA?AUVariant@2@U?$BaseString@D@2@U?$Slice@UVariant@ep@@@2@@Z

'U' is a 'Q', and C++ has a bonus '$$CB'

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