1 files changed, 110 insertions, 0 deletions
diff --git a/deps/sol2/examples/interop/luwra/source/luwra.cpp b/deps/sol2/examples/interop/luwra/source/luwra.cpp
new file mode 100644
index 0000000..2a12f6c
--- /dev/null
+++ b/deps/sol2/examples/interop/luwra/source/luwra.cpp
@@ -0,0 +1,110 @@
+#define SOL_ALL_SAFETIES_ON 1
+#define SOL_ENABLE_INTEROP 1 // MUST be defined to use interop features
+#include <sol/sol.hpp>
+
+#include <luwra.hpp>
+
+#include <iostream>
+#include <assert.hpp>
+
+// luwra,
+// another C++ wrapper library:
+// https://github.com/vapourismo/luwra
+
+struct ABC {
+	ABC()
+	: v_(0) {
+	}
+	ABC(int value)
+	: v_(value) {
+	}
+	int value() const {
+		return v_;
+	}
+	void setValue(int v) {
+		v_ = v;
+	}
+	void overload1() {
+		std::cout << "call overload1" << std::endl;
+	}
+	void overload2(int) {
+		std::cout << "call overload2" << std::endl;
+	}
+
+private:
+	int v_;
+};
+
+template <typename T, typename Handler>
+inline bool sol_lua_interop_check(sol::types<T>, lua_State* L, int relindex, sol::type index_type, Handler&& handler, sol::stack::record& tracking) {
+	// just marking unused parameters for no compiler warnings
+	(void)index_type;
+	(void)handler;
+	// using 1 element
+	tracking.use(1);
+	int index = lua_absindex(L, relindex);
+	if (lua_getmetatable(L, index) == 1) {
+		luaL_getmetatable(L, luwra::internal::UserTypeReg<T>::name.c_str());
+		bool is_correct_type = lua_rawequal(L, -2, -1) == 1;
+		lua_pop(L, 2);
+		return is_correct_type;
+	}
+	return false;
+}
+
+template <typename T>
+inline std::pair<bool, T*> sol_lua_interop_get(sol::types<T> t, lua_State* L, int relindex, void* unadjusted_pointer, sol::stack::record& tracking) {
+	// you may not need to specialize this method every time:
+	// some libraries are compatible with sol3's layout
+	int index = lua_absindex(L, relindex);
+	if (!sol_lua_interop_check(t, L, index, sol::type::userdata, sol::no_panic, tracking)) {
+		return { false, nullptr };
+	}
+	return { true, static_cast<T*>(unadjusted_pointer) };
+}
+
+void register_sol_stuff(lua_State* L) {
+	// grab raw state and put into state_view
+	// state_view is cheap to construct
+	sol::state_view lua(L);
+	// bind and set up your things: everything is entirely self-contained
+	lua["f"] = sol::overload(
+		[](ABC& from_luwra) {
+			std::cout << "calling 1-argument version with luwra-created ABC { " << from_luwra.value() << " }" << std::endl;
+			c_assert(from_luwra.value() == 24);
+		},
+		[](ABC& from_luwra, int second_arg) {
+			std::cout << "calling 2-argument version with luwra-created ABC { " << from_luwra.value() << " } and integer argument of " << second_arg << std::endl;
+			c_assert(from_luwra.value() == 24);
+			c_assert(second_arg == 5);
+		});
+}
+
+void check_with_sol(lua_State* L) {
+	sol::state_view lua(L);
+	ABC& obj = lua["obj"];
+	(void)obj;
+	c_assert(obj.value() == 24);
+}
+
+int main(int, char* []) {
+
+	std::cout << "=== interop example (luwra) ===" << std::endl;
+	std::cout << "code modified from luwra's documentation examples: https://github.com/vapourismo/luwra" << std::endl;
+
+	luwra::StateWrapper state;
+
+	state.registerUserType<ABC(int)>("ABC", { LUWRA_MEMBER(ABC, value), LUWRA_MEMBER(ABC, setValue) }, {});
+
+	register_sol_stuff(state);
+
+	state.runString(R"(
+obj = ABC(24)
+f(obj) -- call 1 argument version
+f(obj, 5) -- call 2 argument version
+)");
+
+	check_with_sol(state);
+
+	return 0;
+}
+\ No newline at end of file