Thanks, Then I end up with a constructor that takes any type of data which can not be distinguished from my other constructors. Peter Dimov wrote:

Okko Willeboordse wrote:

...

So I do

class some_class { public: template <class T> some_class(const boost::function1& get_member)

Why not just

template<class F> some_class( F f );

?

boost::function<> is useful when you have to capture an arbitrary function object in a fixed type. Since your boost::function<> above is templated on T, it has a variable type, so you can just use the function object argument as-is.

Thanks, But also without any other constructor (for both some_class and some_other_class) I get the compiler error. I did another test. I created a function with exactly the same signature as the some_class constructor; template <class T> some_func(const boost::function1& some_member) { } and now the compiler says; error C2784: 'int some_func(const boost::function1 &)' : could not deduce template argument for 'const boost::function1 &' from 'boost::_bi::bind_t' with [ R=short *, F=boost::_mfi::mf1, L=boost::_bi::list2>::B1,boost::_bi::list_av_2>::B2> ] c:\Temp\com\com.cpp(14) : see declaration of 'some_func' Somehow the compiler does not instantiate the function properly when a templated argument is only fed into the function wrapper. Any ideas? Okko