From 07e61f5e729884f8bdc19cf213c919ea6a98369c Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sun, 20 Aug 2023 01:52:30 +0100
Subject: Create Optional ModelParts as unique_ptrs

---
 slicer/slicer/modelParts.h           | 1 +
 slicer/slicer/modelPartsTypes.h      | 2 +-
 slicer/slicer/modelPartsTypes.impl.h | 4 ++--
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/slicer/slicer/modelParts.h b/slicer/slicer/modelParts.h
index 39149fd..f521257 100644
--- a/slicer/slicer/modelParts.h
+++ b/slicer/slicer/modelParts.h
@@ -79,6 +79,7 @@ namespace Slicer {
 	class HookCommon;
 
 	using ModelPartPtr = std::shared_ptr<ModelPart>;
+	using ModelPartUPtr = std::unique_ptr<ModelPart>;
 	using ModelPartForRootPtr = std::unique_ptr<ModelPartForRootBase>;
 	using ModelPartParam = any_ptr<ModelPart>;
 	using ModelPartForRootParam = any_ptr<ModelPartForRootBase>;
diff --git a/slicer/slicer/modelPartsTypes.h b/slicer/slicer/modelPartsTypes.h
index ab262f3..838bbd0 100644
--- a/slicer/slicer/modelPartsTypes.h
+++ b/slicer/slicer/modelPartsTypes.h
@@ -113,7 +113,7 @@ namespace Slicer {
 
 	protected:
 		virtual bool hasModel() const = 0;
-		ModelPartPtr modelPart;
+		ModelPartUPtr modelPart;
 	};
 
 	template<typename T>
diff --git a/slicer/slicer/modelPartsTypes.impl.h b/slicer/slicer/modelPartsTypes.impl.h
index 7884a02..3a4076e 100644
--- a/slicer/slicer/modelPartsTypes.impl.h
+++ b/slicer/slicer/modelPartsTypes.impl.h
@@ -300,7 +300,7 @@ namespace Slicer {
 		ModelPartModel<Ice::optional<typename T::element_type>>(h)
 	{
 		if (this->Model && *this->Model) {
-			modelPart = std::make_shared<T>(&**this->Model);
+			modelPart = std::make_unique<T>(&**this->Model);
 		}
 	}
 
@@ -319,7 +319,7 @@ namespace Slicer {
 		BOOST_ASSERT(this->Model);
 		if (!*this->Model) {
 			*this->Model = typename T::element_type();
-			modelPart = std::make_shared<T>(&**this->Model);
+			modelPart = std::make_unique<T>(&**this->Model);
 			modelPart->Create();
 		}
 	}
-- 
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