Hello all,
Can anyone give me a hint on how to call a functor on the differences of two same size mpl::vector types?
For example, given:
typedef boost::mpl::vector<int, char, short, double> v0_type;
typedef boost::mpl::vector<int, int, short, std::string> v1_type;
We can see that the second and third elements don't match, so I wish to call a functor twice, with the following signature:
struct SomeFunctor {
template <typename T, typename U>
void operator()(T t, U u) const {
// do something nice here
}
};
In this example, functor would be called twice: once with [T=char, U=int] and another with [T=short, U=std::string], along with their values.
Looks like using a zip_view [1] followed by a filter_view [2] followed by a for_each [3] will get you what you want. E.g., (untested)
typedef mpl::filter_view< zip_view_type, mpl::not_< boost::is_same< mpl::_1, mpl::_2 > > > filter_view_type;