Adding sol.scratch.cpp, and will also add CATCH for tests.

.gitignore

@@ -4,8 +4,6 @@ bin/*
 demacro.txt
 Shinobi2
 dev.*
-main.cpp
-sol.scratch.cpp
 lua-5.2.2/
 Debug/
 Release/

sol.scratch.cpp

@@ -0,0 +1,66 @@
+#include <sol.hpp>
+#include <iostream>
+#include <tuple>
+
+std::string free_func_yo() {
+    std::cout << "free_func_yo()" << std::endl;
+    return "test";
+}
+
+struct member_test {
+
+    std::string operator() () {
+        std::cout << "member_test()" << std::endl;
+        return "test";
+    }
+
+};
+
+void run_test(sol::state& lua) {
+    lua.script("assert(os.fun() == \"test\")\n"
+        "assert(os.name == \"windows\")");
+}
+
+int main( ) {
+	sol::state lua;
+	lua.open_libraries( sol::lib::base, sol::lib::os );
+
+	lua.get<sol::table>( "os" ).set( "name", "windows" );
+
+	lua.get<sol::table>( "os" ).set_function( "fun",
+		[ ] ( ) {
+		std::cout << "stateless lambda()" << std::endl;
+		return "test";
+	}
+	);
+	run_test( lua );
+
+	lua.get<sol::table>( "os" ).set_function( "fun", &free_func_yo );
+	run_test( lua );
+
+	// l-value, can optomize
+	auto lval = member_test( );
+	lua.get<sol::table>( "os" ).set_function( "fun", &member_test::operator(), lval );
+	run_test( lua );
+
+	// Tests will begin failing here
+	// stateful lambda: non-convertible, unoptomizable
+	int breakit = 50;
+	lua.get<sol::table>( "os" ).set_function( "fun",
+		[ &breakit ] ( ) {
+		std::cout << "stateless lambda()" << std::endl;
+		return "test";
+	}
+	);
+	run_test( lua );
+
+	// r-value, cannot optomize
+	lua.get<sol::table>( "os" ).set_function( "fun", &member_test::operator(), member_test( ) );
+	run_test( lua );
+
+	// r-value, cannot optomize
+	auto rval = member_test( );
+	lua.get<sol::table>( "os" ).set_function( "fun", &member_test::operator(), std::move( rval ) );
+	run_test( lua );
+
+}