1 files changed, 41 insertions, 0 deletions
diff --git a/src/DI/interfaces/copyable_functor.hpp b/src/DI/interfaces/copyable_functor.hpp
new file mode 100644
index 0000000..46b7588
--- /dev/null
+++ b/src/DI/interfaces/copyable_functor.hpp
@@ -0,0 +1,41 @@
+#pragma once
+
+#include <typeinfo>
+
+/**
+ * A copyable function object.
+ */
+template <class Function>
+class ICopyableFunctor;
+
+template <class Return, class... Args>
+class ICopyableFunctor<Return(Args...)>
+{
+public:
+	ICopyableFunctor() = default;
+
+	ICopyableFunctor(const ICopyableFunctor &) = delete;
+
+	ICopyableFunctor(ICopyableFunctor &&) = delete;
+
+	virtual ~ICopyableFunctor() = default;
+
+	[[nodiscard]] virtual auto clone() const -> ICopyableFunctor * = 0;
+
+	virtual void clone(ICopyableFunctor *) const = 0;
+
+	virtual void destroy() noexcept = 0;
+
+	virtual void destroy_deallocate() noexcept = 0;
+
+	virtual auto operator()(Args &&...) -> Return = 0;
+
+	auto operator=(const ICopyableFunctor &) = delete;
+
+	auto operator=(ICopyableFunctor &&) = delete;
+
+	[[nodiscard]] virtual auto target(const std::type_info &) const noexcept -> const
+		void * = 0;
+
+	[[nodiscard]] virtual auto target_type() const noexcept -> const std::type_info & = 0;
+};