Add operator| overload to make OpenMesh XY_range(...) work with std::ranges

Wraps the OpenMesh with iota and forwards the adapter

1 files changed, 24 insertions, 7 deletions

diff --git a/thirdparty/openmesh/helpers.h b/thirdparty/openmesh/helpers.h
index bed885c..d148c06 100644
--- a/thirdparty/openmesh/helpers.h
+++ b/thirdparty/openmesh/helpers.h
@@ -1,11 +1,28 @@
 #pragma once
 #include <OpenMesh/Core/Mesh/BaseKernel.hh>
+#include <OpenMesh/Core/Mesh/PolyConnectivity.hh>
+#include <ranges>
 
-namespace OpenMesh::Helpers {
-	template<typename Type, template<typename> typename PropertyT> struct Property : public PropertyT<Type> {
-		template<typename... Params> explicit Property(OpenMesh::BaseKernel * kernel, Params &&... params)
-		{
-			kernel->add_property(*this, std::forward<Params>(params)...);
-		}
-	};
+namespace OpenMesh {
+	template<typename Iter, typename CenterEntityHandle>
+	using IteratorFunction = Iter (OpenMesh::PolyConnectivity::*)(CenterEntityHandle) const;
+
+	template<typename Iter, typename CenterEntityHandle, IteratorFunction<Iter, CenterEntityHandle> BeginFunc,
+			IteratorFunction<Iter, CenterEntityHandle> EndFunc, typename Adaptor>
+	auto
+	operator|(const OpenMesh::PolyConnectivity::CirculatorRange<OpenMesh::PolyConnectivity, Iter, CenterEntityHandle,
+					  BeginFunc, EndFunc> & range,
+			Adaptor && adaptor)
+	{
+		return std::views::iota(range.begin(), range.end()) | std::forward<Adaptor>(adaptor);
+	}
+
+	namespace Helpers {
+		template<typename Type, template<typename> typename PropertyT> struct Property : public PropertyT<Type> {
+			template<typename... Params> explicit Property(OpenMesh::BaseKernel * kernel, Params &&... params)
+			{
+				kernel->add_property(*this, std::forward<Params>(params)...);
+			}
+		};
+	}
 }