Re: [Boost-users] [function,bind] Templated function<> function

16 Jul 2008

      AMDG

Michiel Helvensteijn wrote:
...
But you understand why I'd like the templated version to
work. I have other predicates to test
Ok.  The compiler can't deduce T in

template <class T>
function<bool (T)> neg(function<bool (T)> func);

unless the argument is already a boost::function.  No implicit conversions
allowed.

template<class F>
struct not_t {
    typedef bool result_type;
    template<class T>
    bool operator()(const T& t) { return(!f(t)); }
    F f;
};

template<class F>
not_t<F> neg(F f) {
    not_t<F> result = { f };
    return(result);
}

In Christ,
Steven Watanabe