Initial support for require statements

src/ScriptOptions.hpp

@@ -2,28 +2,54 @@
 #define PORYGONLANG_SCRIPTOPTIONS_HPP
 
 #include <string>
-
+#include <utility>
 namespace Porygon{
+    class Script;
+
     class ScriptOptions{
         static Porygon::ScriptOptions DefaultScriptOptions;
-        static void (*_print)(const char16_t* s);
+        static void DefaultPrint(const char16_t* s);
+        static bool DefaultModuleExists(const std::string& moduleName);
+        static Script* DefaultResolveModule(const std::string& moduleName);
+
+        void (*_print)(const char16_t* s) = DefaultPrint;
+        bool (*_doesModuleExist)(const std::string& moduleName) = DefaultModuleExists;
+        Script* (*_resolveModule)(const std::string& moduleName) = DefaultResolveModule;
         static std::streambuf* _printBuffer;
         static std::ostream* _printStream;
+
     public:
         static Porygon::ScriptOptions* GetDefaultScriptOptions(){
             return &DefaultScriptOptions;
         }
 
+
         inline void Print(const char16_t* s) const{
-            ScriptOptions::_print(s);
+            this -> _print(s);
+        }
+
+        inline bool DoesModuleExist(std::string moduleName) const{
+            return _doesModuleExist(std::move(moduleName));
+        }
+
+        inline Script* ResolveModule(std::string moduleName) const{
+            return _resolveModule(std::move(moduleName));
         }
 
         void SetPrintFunc(void (*print)(const char16_t *)){
-            ScriptOptions::_print = print;
+            this -> _print = print;
+        }
+
+        void SetModuleExistsFunc(bool (*doesModuleExist)(const std::string& moduleName)){
+            this ->_doesModuleExist = doesModuleExist;
+        }
+
+        void SetResolveModuleFunc(Script* (*resolveModule)(const std::string& moduleName)){
+            this ->_resolveModule = resolveModule;
         }
 
         std::ostream& GetPrintStream(){
-            return *ScriptOptions::_printStream;
+            return *Porygon::ScriptOptions::_printStream;
         }
 
         void SetPrintStream(std::ostream* stream){