Fix most of the most pressing warnings

- Fixes #1000
- Fixes #1060
- Fixes #1062
- Fixes #1067

cmake/Modules/FindLuaBuild/LuaVanilla.cmake

@@ -234,7 +234,7 @@ if (LUA_BUILD_LUA_COMPILER)
 endif()
 	set(LUA_VANILLA_GENERATE_LUA_HPP false)
 else()
-	MESSAGE(WARNING "Using Lua 5.4.0-work1 file list for ${LUA_VERSION} version")
+	MESSAGE(WARNING "Using Lua 5.4.1 file list for ${LUA_VERSION} version")
 	set(LUA_VANILLA_LIB_SOURCES lapi.c lauxlib.c lbaselib.c lcode.c lcorolib.c 
 		lctype.c ldblib.c ldebug.c ldo.c ldump.c lfunc.c lgc.c linit.c liolib.c
 		llex.c lmathlib.c lmem.c loadlib.c lobject.c lopcodes.c loslib.c

docs/source/tutorial/all-the-things.rst

@@ -100,7 +100,7 @@ transferring functions (dumping bytecode)
 
 You can dump the bytecode of a function, which allows you to transfer it to another state (or save it, or load it). Note that bytecode is *typically specific to the Lua version*!
 
-.. literalinclude:: ../../../examples/source//dump.cpp
+.. literalinclude:: ../../../examples/source/dump.cpp
 	:linenos:
 
 

examples/CMakeLists.txt

@@ -78,9 +78,9 @@ function (MAKE_EXAMPLE example_source_file example_suffix target_sol)
 	
 	if (MSVC)
 		target_compile_options(${example_name}
-			PRIVATE /std:c++latest /EHsc)
+			PRIVATE /std:c++latest /EHsc /W4)
 		target_compile_definitions(${example_name}
-			PRIVATE UNICODE _UNICODE 
+			PRIVATE UNICODE _UNICODE
 			_CRT_SECURE_NO_WARNINGS _CRT_SECURE_NO_DEPRECATE )
 	else()
 		target_compile_options(${example_name}

examples/source/dump.cpp

@@ -5,13 +5,13 @@
 #include "assert.hpp"
 
 
-int main () {
+int main() {
 	std::cout << "=== dump (serialize between states) ===" << std::endl;
 
 	// 2 states, transferring function from 1 to another
 	sol::state lua;
 	sol::state lua2;
-	
+
 	// we're not going to run the code on the first
 	// state, so we only actually need
 	// the base lib on the second state
@@ -24,10 +24,10 @@ int main () {
 	c_assert(lr.valid());
 
 	// turn it into a function, then dump the bytecode
-	sol::protected_function target = lr;
+	sol::protected_function target = lr.get<sol::protected_function>();
 	sol::bytecode target_bc = target.dump();
 
-	// reload the byte code 
+	// reload the byte code
 	// in the SECOND state
 	auto result2 = lua2.safe_script(target_bc.as_string_view(), sol::script_pass_on_error);
 	// check if it was done properly

examples/source/script_error_handling.cpp

@@ -19,7 +19,7 @@ return 24
 	// Handling code like this can be robust
 	// If you disable exceptions, then obviously you would remove
 	// the try-catch branches,
-	// and then rely on the `lua_atpanic` function being called 
+	// and then rely on the `lua_atpanic` function being called
 	// and trapping errors there before exiting the application
 	{
 		// script_default_on_error throws / panics when the code is bad: trap the error
@@ -30,7 +30,8 @@ return 24
 			c_assert(value == 24);
 		}
 		catch (const sol::error& err) {
-			std::cout << "Something went horribly wrong: thrown error" << "\n\t" << err.what() << std::endl;
+			std::cout << "Something went horribly wrong: thrown error"
+			          << "\n\t" << err.what() << std::endl;
 		}
 	}
 
@@ -45,7 +46,8 @@ return 24
 		if (!result.valid()) {
 			sol::error err = result;
 			sol::call_status status = result.status();
-			std::cout << "Something went horribly wrong: " << sol::to_string(status) << " error" << "\n\t" << err.what() << std::endl;
+			std::cout << "Something went horribly wrong: " << sol::to_string(status) << " error"
+			          << "\n\t" << err.what() << std::endl;
 		}
 	}
 
@@ -63,19 +65,21 @@ return 24
 		if (!loaded_chunk.valid()) {
 			sol::error err = loaded_chunk;
 			sol::load_status status = loaded_chunk.status();
-			std::cout << "Something went horribly wrong loading the code: " << sol::to_string(status) << " error" << "\n\t" << err.what() << std::endl;
+			std::cout << "Something went horribly wrong loading the code: " << sol::to_string(status) << " error"
+			          << "\n\t" << err.what() << std::endl;
 		}
 		else {
 			// Because the syntax is bad, this will never be reached
 			c_assert(false);
 			// If there is a runtime error (lua GC memory error, nil access, etc.)
 			// it will be caught here
-			sol::protected_function script_func = loaded_chunk;
+			sol::protected_function script_func = loaded_chunk.get<sol::protected_function>();
 			sol::protected_function_result result = script_func();
 			if (!result.valid()) {
 				sol::error err = result;
 				sol::call_status status = result.status();
-				std::cout << "Something went horribly wrong running the code: " << sol::to_string(status) << " error" << "\n\t" << err.what() << std::endl;
+				std::cout << "Something went horribly wrong running the code: " << sol::to_string(status) << " error"
+				          << "\n\t" << err.what() << std::endl;
 			}
 		}
 	}

include/sol/demangle.hpp

@@ -138,8 +138,8 @@ namespace sol { namespace detail {
 			{ "operator<", "operator<<", "operator<<=", "operator<=", "operator>", "operator>>", "operator>>=", "operator>=", "operator->", "operator->*" }
 		};
 		int level = 0;
-		std::ptrdiff_t idx = 0;
+		std::size_t idx = 0;
-		for (idx = static_cast<std::ptrdiff_t>(realname.empty() ? 0 : realname.size() - 1); idx > 0; --idx) {
+		for (idx = static_cast<std::size_t>(realname.empty() ? 0 : realname.size() - 1); idx > 0; --idx) {
 			if (level == 0 && realname[idx] == ':') {
 				break;
 			}

single/include/sol/config.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 2020-11-19 20:04:06.393002 UTC
+// Generated 2020-11-19 21:39:27.536445 UTC
-// This header was generated with sol v3.2.3 (revision b8aa189e)
+// This header was generated with sol v3.2.3 (revision 62804667)
 // https://github.com/ThePhD/sol2
 
 #ifndef SOL_SINGLE_CONFIG_HPP

single/include/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 2020-11-19 20:04:06.378005 UTC
+// Generated 2020-11-19 21:39:27.514445 UTC
-// This header was generated with sol v3.2.3 (revision b8aa189e)
+// This header was generated with sol v3.2.3 (revision 62804667)
 // https://github.com/ThePhD/sol2
 
 #ifndef SOL_SINGLE_INCLUDE_FORWARD_HPP

single/include/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 2020-11-19 20:04:05.545004 UTC
+// Generated 2020-11-19 21:39:26.848444 UTC
-// This header was generated with sol v3.2.3 (revision b8aa189e)
+// This header was generated with sol v3.2.3 (revision 62804667)
 // https://github.com/ThePhD/sol2
 
 #ifndef SOL_SINGLE_INCLUDE_HPP
@@ -8309,8 +8309,8 @@ namespace sol { namespace detail {
 			{ "operator<", "operator<<", "operator<<=", "operator<=", "operator>", "operator>>", "operator>>=", "operator>=", "operator->", "operator->*" }
 		};
 		int level = 0;
-		std::ptrdiff_t idx = 0;
+		std::size_t idx = 0;
-		for (idx = static_cast<std::ptrdiff_t>(realname.empty() ? 0 : realname.size() - 1); idx > 0; --idx) {
+		for (idx = static_cast<std::size_t>(realname.empty() ? 0 : realname.size() - 1); idx > 0; --idx) {
 			if (level == 0 && realname[idx] == ':') {
 				break;
 			}

tests/regression_tests/simple/CMakeLists.txt

@@ -36,7 +36,7 @@ function(CREATE_TEST test_target_name test_name target_sol)
 
 	if (MSVC)
 		target_compile_options(${test_target_name}
-			PRIVATE /EHsc /std:c++latest)
+			PRIVATE /EHsc /std:c++latest /W4)
 		target_compile_definitions(${test_target_name}
 			PRIVATE UNICODE _UNICODE 
 			_CRT_SECURE_NO_WARNINGS _CRT_SECURE_NO_DEPRECATE)

tests/regression_tests/simple/source/1067.cpp

@@ -0,0 +1,13 @@
+#define SOL_ALL_SAFETIES_ON 1
+
+#include <sol/sol.hpp>
+
+int regression_1067() {
+	sol::state lua;
+
+	lua.open_libraries(sol::lib::base);
+	lua["fct"] = std::function<int()> { []() { return 42; } };
+	lua.script("print(fct())");
+
+	return 0;
+}

tests/regression_tests/simple/source/main.cpp

@@ -1,11 +1,12 @@
 #include <cstddef>
 
-extern int regression_1008();
 extern int regression_1000();
+extern int regression_1008();
+extern int regression_1067();
 
 int main(int, char*[]) {
 	using f_ptr = int (*)();
-	const f_ptr regressions[] = { &regression_1008, &regression_1000 };
+	const f_ptr regressions[] = { &regression_1008, &regression_1000, &regression_1067 };
 	const int sizeof_regressions = sizeof(regressions) / sizeof(regressions[0]);
 	int r = 0;
 	for (std::size_t i = 0; i < sizeof_regressions; ++i) {