add pointer() method

single/sol/sol.hpp

@@ -20,8 +20,8 @@
 // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 // This file was generated with a script.
-// Generated 2018-06-27 11:15:40.545352 UTC
+// Generated 2018-06-27 15:33:51.932186 UTC
-// This header was generated with sol v2.20.4 (revision 3935dc4)
+// This header was generated with sol v2.20.4 (revision 60ee53a)
 // https://github.com/ThePhD/sol2
 
 #ifndef SOL_SINGLE_INCLUDE_HPP
@@ -5530,6 +5530,9 @@ namespace sol {
 		template <>
 		struct lua_type_of<void*> : std::integral_constant<type, type::lightuserdata> {};
 
+		template <>
+		struct lua_type_of<const void*> : std::integral_constant<type, type::lightuserdata> {};
+
 		template <>
 		struct lua_type_of<lightuserdata_value> : std::integral_constant<type, type::lightuserdata> {};
 
@@ -6513,6 +6516,11 @@ namespace sol {
 			return index;
 		}
 
+		const void* pointer() const noexcept {
+			const void* vp = lua_topointer(lua_state(), stack_index());
+			return vp;
+		}
+
 		type get_type() const noexcept {
 			int result = lua_type(lua_state(), index);
 			return static_cast<type>(result);
@@ -6957,6 +6965,12 @@ namespace sol {
 			return !(ref == LUA_NOREF || ref == LUA_REFNIL);
 		}
 
+		const void* pointer() const noexcept {
+			int si = push();
+			const void* vp = lua_topointer(lua_state(), -si);
+			return vp;
+		}
+
 		explicit operator bool() const noexcept {
 			return valid();
 		}
@@ -9843,6 +9857,14 @@ namespace stack {
 		}
 	};
 
+	template <>
+	struct getter<const void*> {
+		static const void* get(lua_State* L, int index, record& tracking) {
+			tracking.use(1);
+			return lua_touserdata(L, index);
+		}
+	};
+
 	template <typename T>
 	struct getter<detail::as_value_tag<T>> {
 		static T* get_no_lua_nil(lua_State* L, int index, record& tracking) {
@@ -10673,6 +10695,14 @@ namespace stack {
 		}
 	};
 
+	template <>
+	struct pusher<const void*> {
+		static int push(lua_State* L, const void* userdata) {
+			lua_pushlightuserdata(L, const_cast<void*>(userdata));
+			return 1;
+		}
+	};
+
 	template <>
 	struct pusher<lightuserdata_value> {
 		static int push(lua_State* L, lightuserdata_value userdata) {

single/sol/sol_forward.hpp

@@ -20,8 +20,8 @@
 // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 // This file was generated with a script.
-// Generated 2018-06-27 11:15:40.807656 UTC
+// Generated 2018-06-27 15:33:52.214419 UTC
-// This header was generated with sol v2.20.4 (revision 3935dc4)
+// This header was generated with sol v2.20.4 (revision 60ee53a)
 // https://github.com/ThePhD/sol2
 
 #ifndef SOL_SINGLE_INCLUDE_FORWARD_HPP

sol/reference.hpp

@@ -429,6 +429,12 @@ namespace sol {
 			return !(ref == LUA_NOREF || ref == LUA_REFNIL);
 		}
 
+		const void* pointer() const noexcept {
+			int si = push();
+			const void* vp = lua_topointer(lua_state(), -si);
+			return vp;
+		}
+
 		explicit operator bool() const noexcept {
 			return valid();
 		}

sol/stack_get_unqualified.hpp

@@ -739,6 +739,14 @@ namespace stack {
 		}
 	};
 
+	template <>
+	struct getter<const void*> {
+		static const void* get(lua_State* L, int index, record& tracking) {
+			tracking.use(1);
+			return lua_touserdata(L, index);
+		}
+	};
+
 	template <typename T>
 	struct getter<detail::as_value_tag<T>> {
 		static T* get_no_lua_nil(lua_State* L, int index, record& tracking) {

sol/stack_push.hpp

@@ -469,6 +469,14 @@ namespace stack {
 		}
 	};
 
+	template <>
+	struct pusher<const void*> {
+		static int push(lua_State* L, const void* userdata) {
+			lua_pushlightuserdata(L, const_cast<void*>(userdata));
+			return 1;
+		}
+	};
+
 	template <>
 	struct pusher<lightuserdata_value> {
 		static int push(lua_State* L, lightuserdata_value userdata) {

sol/stack_reference.hpp

@@ -113,6 +113,11 @@ namespace sol {
 			return index;
 		}
 
+		const void* pointer() const noexcept {
+			const void* vp = lua_topointer(lua_state(), stack_index());
+			return vp;
+		}
+
 		type get_type() const noexcept {
 			int result = lua_type(lua_state(), index);
 			return static_cast<type>(result);

sol/types.hpp

@@ -950,6 +950,9 @@ namespace sol {
 		template <>
 		struct lua_type_of<void*> : std::integral_constant<type, type::lightuserdata> {};
 
+		template <>
+		struct lua_type_of<const void*> : std::integral_constant<type, type::lightuserdata> {};
+
 		template <>
 		struct lua_type_of<lightuserdata_value> : std::integral_constant<type, type::lightuserdata> {};
 

tests/test_utility.cpp

@@ -134,6 +134,27 @@ TEST_CASE("utility/thread", "fire up lots of threads at the same time to make su
 	}());
 }
 
+TEST_CASE("utility/pointer", "check we can get pointer value from references") {
+	sol::state lua;
+	lua.set_function("f", [](bool aorb, sol::reference a, sol::stack_reference b) {
+		if (aorb) {
+			return a.pointer();
+		}
+		return b.pointer();
+	});
+	auto result0 = lua.safe_script("v0 = 'hi'", sol::script_pass_on_error);
+	REQUIRE(result0.valid());
+	auto result1 = lua.safe_script("v1 = f(true, v0)", sol::script_pass_on_error);
+	REQUIRE(result1.valid());
+	auto result2 = lua.safe_script("v2 = f(false, nil, v0)", sol::script_pass_on_error);
+	REQUIRE(result2.valid());
+	const void* ap = lua["v1"];
+	const void* bp = lua["v2"];
+	REQUIRE(ap != nullptr);
+	REQUIRE(bp != nullptr);
+	REQUIRE(ap == bp);
+}
+
 TEST_CASE("utility/this_state", "Ensure this_state argument can be gotten anywhere in the function.") {
 	struct bark {
 		int with_state(sol::this_state l, int a, int b) {