Re: [boost] [proto][can_be_called]

Subject: Re: [boost] [proto][can_be_called]
From: Andy Venikov (avenikov_at_[hidden])
Date: 2010-05-06 13:47:57

Andy Venikov wrote:
> Currently,
> can_be_called<> expects only functors.
> 
> Is it possible to extend it so that it can take any type and return true 
> if that type can be called with the list of given parameters.
> 
> For example,
> 
> 
> function<int (int, char, long)> functor;
> int f(int, char, long);
> int dummyInt;
> 
> 
> int main(int argc, char ** argv)
> {
>     assert(false == test(functor, argc, 11, argv));
>     assert(true == test(functor, 10, 11, 12));
> 
>     assert(true == test(f, 10, 11, 12));
>     assert(false == test(dummyInt, 1));
> }
> 
<snip>

Sorry, forgot the implementation of function template test:

template <typename Func, typename ... Prms>
inline
bool test(Func && func, Prms && ... prms)
{
     return can_be_called<Func, Prms...>::value;
}