inline bool is_mergeable (const range<iter1_t> &src1,
const range<iter2_t> &src2, compare comp )
{ //---------------------------- begin ------------------------------------
typedef typename iterator_traits<iter1_t>::value_type type1 ;
typedef typename iterator_traits<iter2_t>::value_type type2 ;
static_assert ( std::is_same<type1, type2>::value,
"Incompatible iterators\n");
//---------------------------- begin --------------------------------------
return comp ( *(src2.front()), *(src1.back()));
};
inline type::bool_t intersects(range<entity<Segments ... >> const & one, range<entity<Segments ... >> const & two) noexcept
{
return (one.front() <= two.back()) && (two.front() <= one.back());
}