Re: [Boost-users] function object wrapper problem

On Aug 29, 2005, at 4:44 PM, Okko Willeboordse wrote:

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,

Then I end up with a constructor that takes any type of data which can not be distinguished from my other constructors.

I'm not sure what your other constructors look like, but perhaps you could constrain F such that there is no question that the templated constructor will accidently bind to the wrong call. For example: class some_class { public: some_class(int i); template <class T> template<class F> some_class( F f, typename enable_if::value>::type* = 0); }; -Howard