Re: [boost] Getting the types of arguments for a bind.

Subject: Re: [boost] Getting the types of arguments for a bind.
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2008-10-10 17:19:24

AMDG

Michael Marcin wrote:
> I want to take a boost::bind functor and get the type of its arguments.
>
> I can't find any sort of introspection api documented. I tried using 
> mpl but what I came up with doesn't seem to work.
>
> Is there a way to do this?

It isn't possible in general, because function objects created with bind 
are polymorphic.

#include <boost/bind.hpp>

struct F {
    typedef void result_type;
    template<class T>
    void operator()(const T&) const {}
};

template<class F>
void call(const F& f) {
    f(1);
    f("test");
}

int main() {
    call(boost::bind(F(), _1));
}

In Christ,
Steven Watanabe