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["Laurent Rineau (GeometryFactory)" <>]

On jeudi 30 juin 2011 16:58:16 updog wrote:
> #include <iostream>
> #include <fstream>
> #include &lt;CGAL/Cartesian.h&gt;
> #include &lt;CGAL/squared_distance_3.h&gt;
> #include &lt;CGAL/Point_3.h&gt;
> typedef CGAL::Point_3< CGAL::Cartesian<double> >     Point;
> 
> using std::cout;
> using std::endl;
> 
> int main() {
>   Point p1, p2;
>   double x = squared_distance(p1, p2);
>   cout << x << endl;
>   return 0;
> }
> 
> Note that I forgot to place "CGAL::" before squared_distance(p1,p2), why
> this still can be compiled?

It is a feature of C++:
  http://en.wikipedia.org/wiki/Argument-dependent_name_lookup

p1 and p2 are objects of types in the CGAL namespace, and name lookup for 
squared_distance searches in that namespace too.

-- 
Laurent Rineau, PhD
R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
Release Manager of the CGAL Project       http://www.cgal.org/