1 files changed, 87 insertions, 0 deletions
diff --git a/lib/sol2/include/sol/object_base.hpp b/lib/sol2/include/sol/object_base.hpp
new file mode 100644
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+++ b/lib/sol2/include/sol/object_base.hpp
@@ -0,0 +1,87 @@
+// sol3 
+
+// The MIT License (MIT)
+
+// Copyright (c) 2013-2019 Rapptz, ThePhD and contributors
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy of
+// this software and associated documentation files (the "Software"), to deal in
+// the Software without restriction, including without limitation the rights to
+// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+// the Software, and to permit persons to whom the Software is furnished to do so,
+// subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+#ifndef SOL_OBJECT_BASE_HPP
+#define SOL_OBJECT_BASE_HPP
+
+#include "reference.hpp"
+#include "stack.hpp"
+
+namespace sol {
+
+	template <typename ref_t>
+	class basic_object_base : public ref_t {
+	private:
+		using base_t = ref_t;
+		
+		template <typename T>
+		decltype(auto) as_stack(std::true_type) const {
+			return stack::get<T>(base_t::lua_state(), base_t::stack_index());
+		}
+
+		template <typename T>
+		decltype(auto) as_stack(std::false_type) const {
+			base_t::push();
+			return stack::pop<T>(base_t::lua_state());
+		}
+
+		template <typename T>
+		bool is_stack(std::true_type) const {
+			return stack::check<T>(base_t::lua_state(), base_t::stack_index(), no_panic);
+		}
+
+		template <typename T>
+		bool is_stack(std::false_type) const {
+			int r = base_t::registry_index();
+			if (r == LUA_REFNIL)
+				return meta::any_same<meta::unqualified_t<T>, lua_nil_t, nullopt_t, std::nullptr_t>::value ? true : false;
+			if (r == LUA_NOREF)
+				return false;
+			auto pp = stack::push_pop(*this);
+			return stack::check<T>(base_t::lua_state(), -1, no_panic);
+		}
+
+	public:
+		basic_object_base() noexcept = default;
+		basic_object_base(const basic_object_base&) = default;
+		basic_object_base(basic_object_base&&) = default;
+		basic_object_base& operator=(const basic_object_base&) = default;
+		basic_object_base& operator=(basic_object_base&&) = default;
+		template <typename T, typename... Args, meta::enable<meta::neg<std::is_same<meta::unqualified_t<T>, basic_object_base>>> = meta::enabler>
+		basic_object_base(T&& arg, Args&&... args)
+		: base_t(std::forward<T>(arg), std::forward<Args>(args)...) {
+		}
+
+		template <typename T>
+		decltype(auto) as() const {
+			return as_stack<T>(is_stack_based<base_t>());
+		}
+
+		template <typename T>
+		bool is() const {
+			return is_stack<T>(is_stack_based<base_t>());
+		}
+	};
+} // namespace sol
+
+#endif // SOL_OBJECT_BASE_HPP