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Subject: Re: [boost] [bind] virtual function pointer woes
From: Eric Niebler (eric_at_[hidden])
Date: 2009-01-09 12:24:18

Jon Biggar wrote:
> Chris wrote:
>> As far as I know, no. If you find a true answer, please tell me.
>> I had this problem once as well and looked into it on the
>> newsgroups. There may be a non-portable way with the vtable and asm,
>> but not generally. My suggestion would be to make a split
>> _nv function that does the call
>> struct B { virtual void f() { f_nv(); } void f_nv()
>> {std::printf("B\n"); } };
>> struct D : B { virtual void f() { f_nv(); } void f_nv() {
>> std::printf("D\n"); } };
>> And then bind _nv;

This is not an option as the classes B and D are not modifiable.

> Or just create a new free function:
> inline void call_B_f(D &d)
> {
> d->B::f();
> }
> boost::bind(&call_B_f, _1)(d);

Sure, but I'm going to need a lot of these little functions and it's a
pain. C++ has what I want (the member function I want to bind to), but
it's not giving it to me. Very frustrating.

Eric Niebler
BoostPro Computing

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