Update to sol2 v2.20.6

third_party/sol2/examples/interop/luwra/CMakeLists.txt

@@ -0,0 +1,50 @@
+# # # # sol2
+# The MIT License (MIT)
+#
+# Copyright (c) 2013-2018 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.
+
+# # # sol2 interop Examples - luwra
+
+find_package(LuwraBuild)
+
+function (make_luwra_interop_example target_library is_single)
+	set(example_name luwra_interop_example)
+	if (is_single)
+		set(example_name "${example_name}.single")
+	endif(is_single)
+	add_executable(${example_name} luwra.cpp)
+	target_link_libraries(${example_name} PUBLIC ${LUA_LIBRARIES} PRIVATE ${LUWRA_LIBRARIES} ${target_library})
+	if (CMAKE_DL_LIBS)
+		target_link_libraries(${example_name} PRIVATE ${CMAKE_DL_LIBS})
+	endif()
+	if (MSVC)
+		target_compile_options(${example_name} PRIVATE /W1)
+	else()
+		target_compile_options(${example_name} PRIVATE -w)
+	endif()
+	if (TESTS_EXAMPLES)
+		add_test(NAME ${example_name} COMMAND ${example_name})
+	endif()
+endfunction()
+
+make_luwra_interop_example(sol2 FALSE)
+if (SOL2_SINGLE_FOUND AND INTEROP_EXAMPLES_SINGLE)
+	make_luwra_interop_example(sol2_single TRUE)
+endif()

third_party/sol2/examples/interop/luwra/luwra.cpp

@@ -0,0 +1,119 @@
+#define SOL_CHECK_ARGUMENTS 1
+#define SOL_ENABLE_INTEROP 1 // MUST be defined to use interop features
+#include <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_;
+};
+
+namespace sol {
+namespace stack {
+	template <typename T>
+	struct userdata_checker<extensible<T>> {
+		template <typename Handler>
+		static bool check(lua_State* L, int relindex, type index_type, Handler&& handler, 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>
+	struct userdata_getter<extensible<T>> {
+		static std::pair<bool, T*> get(lua_State* L, int relindex, void* unadjusted_pointer, record& tracking) {
+			// you may not need to specialize this method every time:
+			// some libraries are compatible with sol2's layout
+			int index = lua_absindex(L, relindex);
+			if (!userdata_checker<extensible<T>>::check(L, index, type::userdata, no_panic, tracking)) {
+				return { false, nullptr };
+			}
+			return { true, static_cast<T*>(unadjusted_pointer) };
+		}
+	};
+}
+} // namespace sol::stack
+
+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;
+}