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

16 Jul 2008

      Ok, the subject-line might be a bit confusing. :-)

I have the following template function:

template<class T>
bool is(const string& str);

Its implementation is not important. It checks if a string can be converted
to type T by std::stringstream. I also have the following function:

template <class T>
function<bool (T)> neg(function<bool (T)> func) {
    return !bind(func, _1);
}

Which I use in the following way:

BOOST_CHECK_PREDICATE( neg(is<int>), ("text") );

But the compiler (GCC 4.1.2) complains:

error: no matching function for call to 'neg(<unresolved overloaded function
type>)'

What's the problem. And, also, what's the solution? :-)

Thanks in advance!

-- 
Michiel Helvensteijn