Re: [Boost-Users] Using boost::function with VC6

[Edward Diener]

Is there any way to use boost::function and member function pointers with VC6 . I realize it is deficient in partial specialization but I was still hoping to be able to use it. All my attempts to compile meet with failure although the compiler tests say that VC6 succeeds both with boost::function and boost::bind.

It works for me :-)

If I try the bind1st.cpp example in libs\function\example directory I get the error:

error C2784: 'class std::mem_fun_t<_R,_Ty> __cdecl std::mem_fun(_R (__thiscall _Ty::*)(void))' : could not deduce template argument for '<Unknown>' from 'int (__thiscall X::*)(int)'

If I try some code of my own and use boost::bind instead, I get an error:

error C2780: 'class boost::_bi::bind_t,class boost::_bi::list9

...

__cdecl boost::bind(R (__thiscall T::*)(B1,B2 ,B3,B4,B5,B6,B7,B8) const,A1,A2,A3,A4,A5,A6,A7,A8,A9)' : expects 10 arguments - 2 provided

Amazing. I was struggling with both these very same compiler errors only this morning. Finally I realised I had left something out! Lets have a look at your code and see if you have done the same...

My own code is:

#include "stdafx.h" #include #include

class MyClass { public: int MyMember(int,int,int); };

int MyClass::MyMember(int x,int y,int z) { int a = x + y + z; }

int main(int argc, char* argv[]) { MyClass mcl; boost::function3 bf; bf = boost::bind(&MyClass::MyMember,&mcl); bf(2,3,4); return 0; }

Yep, there it is... you need to tell bind the ordinal positions of each argument to bind to. Just rewrite the line that constructs bind something like this: bf = boost::bind(&MyClass::MyMember,&mcl, _1, _2, _3); ...and it should work. I have not tried to compile the above since I am not on my development machine at the moment, but I'm fairly confident that should do it (or at least point you in the right direction). Regards, [)o IhIL..