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Implemented and alternative for compile time dispatching, which might work with MSVC 14.

This commit is contained in:
Efi Fogel 2023-04-26 19:32:43 +03:00
parent 3e07f88ab5
commit 3f65c37eda
1 changed files with 20 additions and 2 deletions
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22
Arrangement_on_surface_2/include/CGAL/draw_arrangement_2.h
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@ -405,6 +405,7 @@ protected:
/*! Compile time dispatching
*/
#if 0
template <typename T>
auto draw_point_impl2(const Point& p, T const&, long) -> decltype(void())
{ add_point(p); }
@ -422,14 +423,31 @@ protected:
auto draw_point_impl1(const Point& p, T const& traits, int) ->
decltype(traits.approximate_2_object(), void()) {
using Approximate = typename Gt::Approximate_2;
draw_point_impl2<Approximate>(p, traits.approximate_2_object(), 0);
draw_point_impl2<Approximate>(p, traits.approximate_2_object(), true);
}
#else
template <typename T>
void draw_point_impl2(const Point& p, T const&, ...) { add_point(p); }
template <typename T, typename = decltype(T().approximate_2_object()(Point()))>
void draw_point_impl2(const Point& p, T const& traits, bool) {
auto approx = traits.approximate_2_object();
add_point(approx(p));
}
template <typename T>
void draw_point_impl1(const Point& p, T const&, ...) { add_point(p); }
template <typename T, typename = decltype(T().approximate_2_object())>
void draw_point_impl1(const Point& p, T const& traits, bool)
{ draw_point_impl2<Gt>(p, traits, true); }
#endif
/*! Draw a point.
*/
void draw_point(const Point& p) {
const auto* traits = m_arr.geometry_traits();
draw_point_impl1(p, *traits, 0);
draw_point_impl1(p, *traits, true);
}
/*! Add a Connected Component of the Boundary.