New get_trapezoids() implementation. Maybe heavier but it doesn't fail with some versions of GCC like the one provided by Boost.Polygon. #1965

xs/src/Polygon.cpp

@@ -15,6 +15,18 @@ Polygon::operator Polygons() const
     return pp;
 }
 
+Point&
+Polygon::operator[](Points::size_type idx)
+{
+    return this->points[idx];
+}
+
+const Point&
+Polygon::operator[](Points::size_type idx) const
+{
+    return this->points[idx];
+}
+
 Point
 Polygon::last_point() const
 {