Replace NULL with nullptr

core/array.cpp

@@ -67,7 +67,7 @@ void Array::_unref() const {
 	if (_p->refcount.unref()) {
 		memdelete(_p);
 	}
-	_p = NULL;
+	_p = nullptr;
 }
 
 Variant &Array::operator[](int p_idx) {
@@ -467,7 +467,7 @@ const void *Array::id() const {
 
 Array::Array(const Array &p_from) {
 
-	_p = NULL;
+	_p = nullptr;
 	_ref(p_from);
 }
 

core/bind/core_bind.cpp

@@ -62,7 +62,7 @@ static const unsigned int MONTH_DAYS_TABLE[2][12] = {
 	{ 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
 };
 
-_ResourceLoader *_ResourceLoader::singleton = NULL;
+_ResourceLoader *_ResourceLoader::singleton = nullptr;
 
 Error _ResourceLoader::load_threaded_request(const String &p_path, const String &p_type_hint, bool p_use_sub_threads) {
 
@@ -173,7 +173,7 @@ Vector<String> _ResourceSaver::get_recognized_extensions(const RES &p_resource)
 	return ret;
 }
 
-_ResourceSaver *_ResourceSaver::singleton = NULL;
+_ResourceSaver *_ResourceSaver::singleton = nullptr;
 
 void _ResourceSaver::_bind_methods() {
 
@@ -778,7 +778,7 @@ Vector<String> _OS::get_granted_permissions() const {
 String _OS::get_unique_id() const {
 	return OS::get_singleton()->get_unique_id();
 }
-_OS *_OS::singleton = NULL;
+_OS *_OS::singleton = nullptr;
 
 void _OS::_bind_methods() {
 
@@ -916,7 +916,7 @@ _OS::_OS() {
 
 ///////////////////// GEOMETRY
 
-_Geometry *_Geometry::singleton = NULL;
+_Geometry *_Geometry::singleton = nullptr;
 
 _Geometry *_Geometry::get_singleton() {
 
@@ -1363,11 +1363,11 @@ void _File::close() {
 
 	if (f)
 		memdelete(f);
-	f = NULL;
+	f = nullptr;
 }
 bool _File::is_open() const {
 
-	return f != NULL;
+	return f != nullptr;
 }
 String _File::get_path() const {
 
@@ -1630,7 +1630,7 @@ void _File::store_var(const Variant &p_var, bool p_full_objects) {
 
 	ERR_FAIL_COND_MSG(!f, "File must be opened before use.");
 	int len;
-	Error err = encode_variant(p_var, NULL, len, p_full_objects);
+	Error err = encode_variant(p_var, nullptr, len, p_full_objects);
 	ERR_FAIL_COND_MSG(err != OK, "Error when trying to encode Variant.");
 
 	Vector<uint8_t> buff;
@@ -1654,7 +1654,7 @@ Variant _File::get_var(bool p_allow_objects) const {
 	const uint8_t *r = buff.ptr();
 
 	Variant v;
-	Error err = decode_variant(v, &r[0], len, NULL, p_allow_objects);
+	Error err = decode_variant(v, &r[0], len, nullptr, p_allow_objects);
 	ERR_FAIL_COND_V_MSG(err != OK, Variant(), "Error when trying to encode Variant.");
 
 	return v;
@@ -1733,7 +1733,7 @@ void _File::_bind_methods() {
 
 _File::_File() {
 
-	f = NULL;
+	f = nullptr;
 	eswap = false;
 }
 
@@ -1934,7 +1934,7 @@ _Directory::~_Directory() {
 		memdelete(d);
 }
 
-_Marshalls *_Marshalls::singleton = NULL;
+_Marshalls *_Marshalls::singleton = nullptr;
 
 _Marshalls *_Marshalls::get_singleton() {
 	return singleton;
@@ -1943,7 +1943,7 @@ _Marshalls *_Marshalls::get_singleton() {
 String _Marshalls::variant_to_base64(const Variant &p_var, bool p_full_objects) {
 
 	int len;
-	Error err = encode_variant(p_var, NULL, len, p_full_objects);
+	Error err = encode_variant(p_var, nullptr, len, p_full_objects);
 	ERR_FAIL_COND_V_MSG(err != OK, "", "Error when trying to encode Variant.");
 
 	Vector<uint8_t> buff;
@@ -1972,7 +1972,7 @@ Variant _Marshalls::base64_to_variant(const String &p_str, bool p_allow_objects)
 	ERR_FAIL_COND_V(CryptoCore::b64_decode(&w[0], buf.size(), &len, (unsigned char *)cstr.get_data(), strlen) != OK, Variant());
 
 	Variant v;
-	Error err = decode_variant(v, &w[0], len, NULL, p_allow_objects);
+	Error err = decode_variant(v, &w[0], len, nullptr, p_allow_objects);
 	ERR_FAIL_COND_V_MSG(err != OK, Variant(), "Error when trying to decode Variant.");
 
 	return v;
@@ -2151,7 +2151,7 @@ Error _Thread::start(Object *p_instance, const StringName &p_method, const Varia
 	if (!thread) {
 		active = false;
 		target_method = StringName();
-		target_instance = NULL;
+		target_instance = nullptr;
 		userdata = Variant();
 		return ERR_CANT_CREATE;
 	}
@@ -2179,11 +2179,11 @@ Variant _Thread::wait_to_finish() {
 	Variant r = ret;
 	active = false;
 	target_method = StringName();
-	target_instance = NULL;
+	target_instance = nullptr;
 	userdata = Variant();
 	if (thread)
 		memdelete(thread);
-	thread = NULL;
+	thread = nullptr;
 
 	return r;
 }
@@ -2202,8 +2202,8 @@ void _Thread::_bind_methods() {
 _Thread::_Thread() {
 
 	active = false;
-	thread = NULL;
+	thread = nullptr;
-	target_instance = NULL;
+	target_instance = nullptr;
 }
 
 _Thread::~_Thread() {
@@ -2581,7 +2581,7 @@ void _Engine::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "physics_jitter_fix"), "set_physics_jitter_fix", "get_physics_jitter_fix");
 }
 
-_Engine *_Engine::singleton = NULL;
+_Engine *_Engine::singleton = nullptr;
 
 _Engine::_Engine() {
 	singleton = this;
@@ -2657,7 +2657,7 @@ Ref<JSONParseResult> _JSON::parse(const String &p_json) {
 	return result;
 }
 
-_JSON *_JSON::singleton = NULL;
+_JSON *_JSON::singleton = nullptr;
 
 _JSON::_JSON() {
 	singleton = this;

core/bind/core_bind.h

@@ -502,7 +502,7 @@ public:
 	String base64_to_utf8(const String &p_str);
 
 	_Marshalls() { singleton = this; }
-	~_Marshalls() { singleton = NULL; }
+	~_Marshalls() { singleton = nullptr; }
 };
 
 class _Mutex : public Reference {

core/callable.cpp

@@ -79,7 +79,7 @@ StringName Callable::get_method() const {
 }
 
 CallableCustom *Callable::get_custom() const {
-	ERR_FAIL_COND_V_MSG(!is_custom(), NULL,
+	ERR_FAIL_COND_V_MSG(!is_custom(), nullptr,
 			vformat("Can't get custom on non-CallableCustom \"%s\".", operator String()));
 	return custom;
 }

core/class_db.cpp

@@ -262,8 +262,8 @@ ClassDB::ClassInfo::ClassInfo() {
 
 	api = API_NONE;
 	class_ptr = nullptr;
-	creation_func = NULL;
+	creation_func = nullptr;
-	inherits_ptr = NULL;
+	inherits_ptr = nullptr;
 	disabled = false;
 	exposed = false;
 }
@@ -290,7 +290,7 @@ void ClassDB::get_class_list(List<StringName> *p_classes) {
 
 	OBJTYPE_RLOCK;
 
-	const StringName *k = NULL;
+	const StringName *k = nullptr;
 
 	while ((k = classes.next(k))) {
 
@@ -304,7 +304,7 @@ void ClassDB::get_inheriters_from_class(const StringName &p_class, List<StringNa
 
 	OBJTYPE_RLOCK;
 
-	const StringName *k = NULL;
+	const StringName *k = nullptr;
 
 	while ((k = classes.next(k))) {
 
@@ -317,7 +317,7 @@ void ClassDB::get_direct_inheriters_from_class(const StringName &p_class, List<S
 
 	OBJTYPE_RLOCK;
 
-	const StringName *k = NULL;
+	const StringName *k = nullptr;
 
 	while ((k = classes.next(k))) {
 
@@ -377,7 +377,7 @@ uint64_t ClassDB::get_api_hash(APIType p_api) {
 
 	List<StringName> names;
 
-	const StringName *k = NULL;
+	const StringName *k = nullptr;
 
 	while ((k = classes.next(k))) {
 
@@ -399,7 +399,7 @@ uint64_t ClassDB::get_api_hash(APIType p_api) {
 
 			List<StringName> snames;
 
-			k = NULL;
+			k = nullptr;
 
 			while ((k = t->method_map.next(k))) {
 
@@ -446,7 +446,7 @@ uint64_t ClassDB::get_api_hash(APIType p_api) {
 
 			List<StringName> snames;
 
-			k = NULL;
+			k = nullptr;
 
 			while ((k = t->constant_map.next(k))) {
 
@@ -466,7 +466,7 @@ uint64_t ClassDB::get_api_hash(APIType p_api) {
 
 			List<StringName> snames;
 
-			k = NULL;
+			k = nullptr;
 
 			while ((k = t->signal_map.next(k))) {
 
@@ -489,7 +489,7 @@ uint64_t ClassDB::get_api_hash(APIType p_api) {
 
 			List<StringName> snames;
 
-			k = NULL;
+			k = nullptr;
 
 			while ((k = t->property_setget.next(k))) {
 
@@ -549,14 +549,14 @@ Object *ClassDB::instance(const StringName &p_class) {
 				ti = classes.getptr(compat_classes[p_class]);
 			}
 		}
-		ERR_FAIL_COND_V_MSG(!ti, NULL, "Cannot get class '" + String(p_class) + "'.");
+		ERR_FAIL_COND_V_MSG(!ti, nullptr, "Cannot get class '" + String(p_class) + "'.");
-		ERR_FAIL_COND_V_MSG(ti->disabled, NULL, "Class '" + String(p_class) + "' is disabled.");
+		ERR_FAIL_COND_V_MSG(ti->disabled, nullptr, "Class '" + String(p_class) + "' is disabled.");
-		ERR_FAIL_COND_V(!ti->creation_func, NULL);
+		ERR_FAIL_COND_V(!ti->creation_func, nullptr);
 	}
 #ifdef TOOLS_ENABLED
 	if (ti->api == API_EDITOR && !Engine::get_singleton()->is_editor_hint()) {
 		ERR_PRINT("Class '" + String(p_class) + "' can only be instantiated by editor.");
-		return NULL;
+		return nullptr;
 	}
 #endif
 	return ti->creation_func();
@@ -572,7 +572,7 @@ bool ClassDB::can_instance(const StringName &p_class) {
 		return false;
 	}
 #endif
-	return (!ti->disabled && ti->creation_func != NULL);
+	return (!ti->disabled && ti->creation_func != nullptr);
 }
 
 void ClassDB::_add_class2(const StringName &p_class, const StringName &p_inherits) {
@@ -595,7 +595,7 @@ void ClassDB::_add_class2(const StringName &p_class, const StringName &p_inherit
 		ti.inherits_ptr = &classes[ti.inherits];
 
 	} else {
-		ti.inherits_ptr = NULL;
+		ti.inherits_ptr = nullptr;
 	}
 }
 
@@ -653,7 +653,7 @@ void ClassDB::get_method_list(StringName p_class, List<MethodInfo> *p_methods, b
 
 #else
 
-		const StringName *K = NULL;
+		const StringName *K = nullptr;
 
 		while ((K = type->method_map.next(K))) {
 
@@ -685,7 +685,7 @@ MethodBind *ClassDB::get_method(StringName p_class, StringName p_name) {
 			return *method;
 		type = type->inherits_ptr;
 	}
-	return NULL;
+	return nullptr;
 }
 
 void ClassDB::bind_integer_constant(const StringName &p_class, const StringName &p_enum, const StringName &p_name, int p_constant) {
@@ -737,7 +737,7 @@ void ClassDB::get_integer_constant_list(const StringName &p_class, List<String>
 		for (List<StringName>::Element *E = type->constant_order.front(); E; E = E->next())
 			p_constants->push_back(E->get());
 #else
-		const StringName *K = NULL;
+		const StringName *K = nullptr;
 
 		while ((K = type->constant_map.next(K))) {
 			p_constants->push_back(*K);
@@ -784,7 +784,7 @@ StringName ClassDB::get_integer_constant_enum(const StringName &p_class, const S
 
 	while (type) {
 
-		const StringName *k = NULL;
+		const StringName *k = nullptr;
 		while ((k = type->enum_map.next(k))) {
 
 			List<StringName> &constants_list = type->enum_map.get(*k);
@@ -810,7 +810,7 @@ void ClassDB::get_enum_list(const StringName &p_class, List<StringName> *p_enums
 
 	while (type) {
 
-		const StringName *k = NULL;
+		const StringName *k = nullptr;
 		while ((k = type->enum_map.next(k))) {
 			p_enums->push_back(*k);
 		}
@@ -876,7 +876,7 @@ void ClassDB::get_signal_list(StringName p_class, List<MethodInfo> *p_signals, b
 
 	while (check) {
 
-		const StringName *S = NULL;
+		const StringName *S = nullptr;
 		while ((S = check->signal_map.next(S))) {
 
 			p_signals->push_back(check->signal_map[*S]);
@@ -938,7 +938,7 @@ void ClassDB::add_property(StringName p_class, const PropertyInfo &p_pinfo, cons
 
 	ERR_FAIL_COND(!type);
 
-	MethodBind *mb_set = NULL;
+	MethodBind *mb_set = nullptr;
 	if (p_setter) {
 		mb_set = get_method(p_class, p_setter);
 #ifdef DEBUG_METHODS_ENABLED
@@ -950,7 +950,7 @@ void ClassDB::add_property(StringName p_class, const PropertyInfo &p_pinfo, cons
 #endif
 	}
 
-	MethodBind *mb_get = NULL;
+	MethodBind *mb_get = nullptr;
 	if (p_getter) {
 
 		mb_get = get_method(p_class, p_getter);
@@ -1087,9 +1087,9 @@ bool ClassDB::get_property(Object *p_object, const StringName &p_property, Varia
 				Callable::CallError ce;
 				if (psg->_getptr) {
 
-					r_value = psg->_getptr->call(p_object, NULL, 0, ce);
+					r_value = psg->_getptr->call(p_object, nullptr, 0, ce);
 				} else {
-					r_value = p_object->call(psg->getter, NULL, 0, ce);
+					r_value = p_object->call(psg->getter, nullptr, 0, ce);
 				}
 			}
 			return true;
@@ -1246,33 +1246,33 @@ MethodBind *ClassDB::bind_methodfi(uint32_t p_flags, MethodBind *p_bind, const c
 #endif
 
 	OBJTYPE_WLOCK;
-	ERR_FAIL_COND_V(!p_bind, NULL);
+	ERR_FAIL_COND_V(!p_bind, nullptr);
 	p_bind->set_name(mdname);
 
 	String instance_type = p_bind->get_instance_class();
 
 #ifdef DEBUG_ENABLED
 
-	ERR_FAIL_COND_V_MSG(has_method(instance_type, mdname), NULL, "Class " + String(instance_type) + " already has a method " + String(mdname) + ".");
+	ERR_FAIL_COND_V_MSG(has_method(instance_type, mdname), nullptr, "Class " + String(instance_type) + " already has a method " + String(mdname) + ".");
 #endif
 
 	ClassInfo *type = classes.getptr(instance_type);
 	if (!type) {
 		memdelete(p_bind);
-		ERR_FAIL_V_MSG(NULL, "Couldn't bind method '" + mdname + "' for instance '" + instance_type + "'.");
+		ERR_FAIL_V_MSG(nullptr, "Couldn't bind method '" + mdname + "' for instance '" + instance_type + "'.");
 	}
 
 	if (type->method_map.has(mdname)) {
 		memdelete(p_bind);
 		// overloading not supported
-		ERR_FAIL_V_MSG(NULL, "Method already bound '" + instance_type + "::" + mdname + "'.");
+		ERR_FAIL_V_MSG(nullptr, "Method already bound '" + instance_type + "::" + mdname + "'.");
 	}
 
 #ifdef DEBUG_METHODS_ENABLED
 
 	if (method_name.args.size() > p_bind->get_argument_count()) {
 		memdelete(p_bind);
-		ERR_FAIL_V_MSG(NULL, "Method definition provides more arguments than the method actually has '" + instance_type + "::" + mdname + "'.");
+		ERR_FAIL_V_MSG(nullptr, "Method definition provides more arguments than the method actually has '" + instance_type + "::" + mdname + "'.");
 	}
 
 	p_bind->set_argument_names(method_name.args);
@@ -1383,7 +1383,7 @@ void ClassDB::add_resource_base_extension(const StringName &p_extension, const S
 
 void ClassDB::get_resource_base_extensions(List<String> *p_extensions) {
 
-	const StringName *K = NULL;
+	const StringName *K = nullptr;
 
 	while ((K = resource_base_extensions.next(K))) {
 
@@ -1393,7 +1393,7 @@ void ClassDB::get_resource_base_extensions(List<String> *p_extensions) {
 
 void ClassDB::get_extensions_for_type(const StringName &p_class, List<String> *p_extensions) {
 
-	const StringName *K = NULL;
+	const StringName *K = nullptr;
 
 	while ((K = resource_base_extensions.next(K))) {
 		StringName cmp = resource_base_extensions[*K];
@@ -1413,7 +1413,7 @@ Variant ClassDB::class_get_default_property_value(const StringName &p_class, con
 			default_values[p_class] = HashMap<StringName, Variant>();
 		}
 
-		Object *c = NULL;
+		Object *c = nullptr;
 		bool cleanup_c = false;
 
 		if (Engine::get_singleton()->has_singleton(p_class)) {
@@ -1447,20 +1447,20 @@ Variant ClassDB::class_get_default_property_value(const StringName &p_class, con
 	}
 
 	if (!default_values.has(p_class)) {
-		if (r_valid != NULL) *r_valid = false;
+		if (r_valid != nullptr) *r_valid = false;
 		return Variant();
 	}
 
 	if (!default_values[p_class].has(p_property)) {
-		if (r_valid != NULL) *r_valid = false;
+		if (r_valid != nullptr) *r_valid = false;
 		return Variant();
 	}
 
-	if (r_valid != NULL) *r_valid = true;
+	if (r_valid != nullptr) *r_valid = true;
 	return default_values[p_class][p_property];
 }
 
-RWLock *ClassDB::lock = NULL;
+RWLock *ClassDB::lock = nullptr;
 
 void ClassDB::init() {
 
@@ -1477,13 +1477,13 @@ void ClassDB::cleanup() {
 
 	//OBJTYPE_LOCK; hah not here
 
-	const StringName *k = NULL;
+	const StringName *k = nullptr;
 
 	while ((k = classes.next(k))) {
 
 		ClassInfo &ti = classes[*k];
 
-		const StringName *m = NULL;
+		const StringName *m = nullptr;
 		while ((m = ti.method_map.next(m))) {
 
 			memdelete(ti.method_map[*m]);

core/class_db.h

@@ -234,7 +234,7 @@ public:
 
 		MethodBind *bind = create_method_bind(p_method);
 
-		return bind_methodfi(METHOD_FLAGS_DEFAULT, bind, p_method_name, NULL, 0); //use static function, much smaller binary usage
+		return bind_methodfi(METHOD_FLAGS_DEFAULT, bind, p_method_name, nullptr, 0); //use static function, much smaller binary usage
 	}
 
 	template <class N, class M>
@@ -315,7 +315,7 @@ public:
 		GLOBAL_LOCK_FUNCTION;
 
 		MethodBind *bind = create_vararg_method_bind(p_method, p_info, p_return_nil_is_variant);
-		ERR_FAIL_COND_V(!bind, NULL);
+		ERR_FAIL_COND_V(!bind, nullptr);
 
 		bind->set_name(p_name);
 		bind->set_default_arguments(p_default_args);
@@ -325,13 +325,13 @@ public:
 		ClassInfo *type = classes.getptr(instance_type);
 		if (!type) {
 			memdelete(bind);
-			ERR_FAIL_COND_V(!type, NULL);
+			ERR_FAIL_COND_V(!type, nullptr);
 		}
 
 		if (type->method_map.has(p_name)) {
 			memdelete(bind);
 			// overloading not supported
-			ERR_FAIL_V_MSG(NULL, "Method already bound: " + instance_type + "::" + p_name + ".");
+			ERR_FAIL_V_MSG(nullptr, "Method already bound: " + instance_type + "::" + p_name + ".");
 		}
 		type->method_map[p_name] = bind;
 #ifdef DEBUG_METHODS_ENABLED
@@ -351,12 +351,12 @@ public:
 	static void add_property_group(StringName p_class, const String &p_name, const String &p_prefix = "");
 	static void add_property(StringName p_class, const PropertyInfo &p_pinfo, const StringName &p_setter, const StringName &p_getter, int p_index = -1);
 	static void set_property_default_value(StringName p_class, const StringName &p_name, const Variant &p_default);
-	static void get_property_list(StringName p_class, List<PropertyInfo> *p_list, bool p_no_inheritance = false, const Object *p_validator = NULL);
+	static void get_property_list(StringName p_class, List<PropertyInfo> *p_list, bool p_no_inheritance = false, const Object *p_validator = nullptr);
-	static bool set_property(Object *p_object, const StringName &p_property, const Variant &p_value, bool *r_valid = NULL);
+	static bool set_property(Object *p_object, const StringName &p_property, const Variant &p_value, bool *r_valid = nullptr);
 	static bool get_property(Object *p_object, const StringName &p_property, Variant &r_value);
 	static bool has_property(const StringName &p_class, const StringName &p_property, bool p_no_inheritance = false);
-	static int get_property_index(const StringName &p_class, const StringName &p_property, bool *r_is_valid = NULL);
+	static int get_property_index(const StringName &p_class, const StringName &p_property, bool *r_is_valid = nullptr);
-	static Variant::Type get_property_type(const StringName &p_class, const StringName &p_property, bool *r_is_valid = NULL);
+	static Variant::Type get_property_type(const StringName &p_class, const StringName &p_property, bool *r_is_valid = nullptr);
 	static StringName get_property_setter(StringName p_class, const StringName &p_property);
 	static StringName get_property_getter(StringName p_class, const StringName &p_property);
 
@@ -371,13 +371,13 @@ public:
 
 	static void bind_integer_constant(const StringName &p_class, const StringName &p_enum, const StringName &p_name, int p_constant);
 	static void get_integer_constant_list(const StringName &p_class, List<String> *p_constants, bool p_no_inheritance = false);
-	static int get_integer_constant(const StringName &p_class, const StringName &p_name, bool *p_success = NULL);
+	static int get_integer_constant(const StringName &p_class, const StringName &p_name, bool *p_success = nullptr);
 
 	static StringName get_integer_constant_enum(const StringName &p_class, const StringName &p_name, bool p_no_inheritance = false);
 	static void get_enum_list(const StringName &p_class, List<StringName> *p_enums, bool p_no_inheritance = false);
 	static void get_enum_constants(const StringName &p_class, const StringName &p_enum, List<StringName> *p_constants, bool p_no_inheritance = false);
 
-	static Variant class_get_default_property_value(const StringName &p_class, const StringName &p_property, bool *r_valid = NULL);
+	static Variant class_get_default_property_value(const StringName &p_class, const StringName &p_property, bool *r_valid = nullptr);
 
 	static StringName get_category(const StringName &p_node);
 

core/command_queue_mt.cpp

@@ -113,7 +113,7 @@ CommandQueueMT::CommandQueueMT(bool p_sync) {
 	if (p_sync)
 		sync = memnew(Semaphore);
 	else
-		sync = NULL;
+		sync = nullptr;
 }
 
 CommandQueueMT::~CommandQueueMT() {

core/command_queue_mt.h

@@ -360,7 +360,7 @@ class CommandQueueMT {
 				if (dealloc_one()) {
 					goto tryagain;
 				}
-				return NULL;
+				return nullptr;
 			}
 		} else {
 			// ahead of dealloc_ptr, check that there is room
@@ -374,11 +374,11 @@ class CommandQueueMT {
 					if (dealloc_one()) {
 						goto tryagain;
 					}
-					return NULL;
+					return nullptr;
 				}
 
 				// if this happens, it's a bug
-				ERR_FAIL_COND_V((COMMAND_MEM_SIZE - write_ptr) < 8, NULL);
+				ERR_FAIL_COND_V((COMMAND_MEM_SIZE - write_ptr) < 8, nullptr);
 				// zero means, wrap to beginning
 
 				uint32_t *p = (uint32_t *)&command_mem[write_ptr];
@@ -406,7 +406,7 @@ class CommandQueueMT {
 		lock();
 		T *ret;
 
-		while ((ret = allocate<T>()) == NULL) {
+		while ((ret = allocate<T>()) == nullptr) {
 
 			unlock();
 			// sleep a little until fetch happened and some room is made

core/core_string_names.cpp

@@ -30,7 +30,7 @@
 
 #include "core_string_names.h"
 
-CoreStringNames *CoreStringNames::singleton = NULL;
+CoreStringNames *CoreStringNames::singleton = nullptr;
 
 CoreStringNames::CoreStringNames() :
 		_free(StaticCString::create("free")),

core/core_string_names.h

@@ -41,7 +41,7 @@ class CoreStringNames {
 	static void create() { singleton = memnew(CoreStringNames); }
 	static void free() {
 		memdelete(singleton);
-		singleton = NULL;
+		singleton = nullptr;
 	}
 
 	CoreStringNames();

core/cowdata.h

@@ -61,7 +61,7 @@ private:
 	_FORCE_INLINE_ uint32_t *_get_refcount() const {
 
 		if (!_ptr)
-			return NULL;
+			return nullptr;
 
 		return reinterpret_cast<uint32_t *>(_ptr) - 2;
 	}
@@ -69,7 +69,7 @@ private:
 	_FORCE_INLINE_ uint32_t *_get_size() const {
 
 		if (!_ptr)
-			return NULL;
+			return nullptr;
 
 		return reinterpret_cast<uint32_t *>(_ptr) - 1;
 	}
@@ -77,7 +77,7 @@ private:
 	_FORCE_INLINE_ T *_get_data() const {
 
 		if (!_ptr)
-			return NULL;
+			return nullptr;
 		return reinterpret_cast<T *>(_ptr);
 	}
 
@@ -261,7 +261,7 @@ Error CowData<T>::resize(int p_size) {
 	if (p_size == 0) {
 		// wants to clean up
 		_unref(_ptr);
-		_ptr = NULL;
+		_ptr = nullptr;
 		return OK;
 	}
 
@@ -356,7 +356,7 @@ void CowData<T>::_ref(const CowData &p_from) {
 		return; // self assign, do nothing.
 
 	_unref(_ptr);
-	_ptr = NULL;
+	_ptr = nullptr;
 
 	if (!p_from._ptr)
 		return; //nothing to do
@@ -369,7 +369,7 @@ void CowData<T>::_ref(const CowData &p_from) {
 template <class T>
 CowData<T>::CowData() {
 
-	_ptr = NULL;
+	_ptr = nullptr;
 }
 
 template <class T>

core/crypto/crypto.cpp

@@ -36,11 +36,11 @@
 
 /// Resources
 
-CryptoKey *(*CryptoKey::_create)() = NULL;
+CryptoKey *(*CryptoKey::_create)() = nullptr;
 CryptoKey *CryptoKey::create() {
 	if (_create)
 		return _create();
-	return NULL;
+	return nullptr;
 }
 
 void CryptoKey::_bind_methods() {
@@ -48,11 +48,11 @@ void CryptoKey::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("load", "path"), &CryptoKey::load);
 }
 
-X509Certificate *(*X509Certificate::_create)() = NULL;
+X509Certificate *(*X509Certificate::_create)() = nullptr;
 X509Certificate *X509Certificate::create() {
 	if (_create)
 		return _create();
-	return NULL;
+	return nullptr;
 }
 
 void X509Certificate::_bind_methods() {
@@ -62,8 +62,8 @@ void X509Certificate::_bind_methods() {
 
 /// Crypto
 
-void (*Crypto::_load_default_certificates)(String p_path) = NULL;
+void (*Crypto::_load_default_certificates)(String p_path) = nullptr;
-Crypto *(*Crypto::_create)() = NULL;
+Crypto *(*Crypto::_create)() = nullptr;
 Crypto *Crypto::create() {
 	if (_create)
 		return _create();
@@ -87,11 +87,11 @@ PackedByteArray Crypto::generate_random_bytes(int p_bytes) {
 }
 
 Ref<CryptoKey> Crypto::generate_rsa(int p_bytes) {
-	ERR_FAIL_V_MSG(NULL, "generate_rsa is not available when mbedtls module is disabled.");
+	ERR_FAIL_V_MSG(nullptr, "generate_rsa is not available when mbedtls module is disabled.");
 }
 
 Ref<X509Certificate> Crypto::generate_self_signed_certificate(Ref<CryptoKey> p_key, String p_issuer_name, String p_not_before, String p_not_after) {
-	ERR_FAIL_V_MSG(NULL, "generate_self_signed_certificate is not available when mbedtls module is disabled.");
+	ERR_FAIL_V_MSG(nullptr, "generate_self_signed_certificate is not available when mbedtls module is disabled.");
 }
 
 Crypto::Crypto() {
@@ -113,7 +113,7 @@ RES ResourceFormatLoaderCrypto::load(const String &p_path, const String &p_origi
 			key->load(p_path);
 		return key;
 	}
-	return NULL;
+	return nullptr;
 }
 
 void ResourceFormatLoaderCrypto::get_recognized_extensions(List<String> *p_extensions) const {

core/crypto/crypto.h

@@ -87,7 +87,7 @@ class ResourceFormatLoaderCrypto : public ResourceFormatLoader {
 	GDCLASS(ResourceFormatLoaderCrypto, ResourceFormatLoader);
 
 public:
-	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = NULL, bool p_use_sub_threads = false, float *r_progress = nullptr);
+	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = nullptr, bool p_use_sub_threads = false, float *r_progress = nullptr);
 	virtual void get_recognized_extensions(List<String> *p_extensions) const;
 	virtual bool handles_type(const String &p_type) const;
 	virtual String get_resource_type(const String &p_path) const;

core/crypto/hashing_context.cpp

@@ -33,9 +33,9 @@
 #include "core/crypto/crypto_core.h"
 
 Error HashingContext::start(HashType p_type) {
-	ERR_FAIL_COND_V(ctx != NULL, ERR_ALREADY_IN_USE);
+	ERR_FAIL_COND_V(ctx != nullptr, ERR_ALREADY_IN_USE);
 	_create_ctx(p_type);
-	ERR_FAIL_COND_V(ctx == NULL, ERR_UNAVAILABLE);
+	ERR_FAIL_COND_V(ctx == nullptr, ERR_UNAVAILABLE);
 	switch (type) {
 		case HASH_MD5:
 			return ((CryptoCore::MD5Context *)ctx)->start();
@@ -48,7 +48,7 @@ Error HashingContext::start(HashType p_type) {
 }
 
 Error HashingContext::update(PackedByteArray p_chunk) {
-	ERR_FAIL_COND_V(ctx == NULL, ERR_UNCONFIGURED);
+	ERR_FAIL_COND_V(ctx == nullptr, ERR_UNCONFIGURED);
 	size_t len = p_chunk.size();
 	ERR_FAIL_COND_V(len == 0, FAILED);
 	const uint8_t *r = p_chunk.ptr();
@@ -64,7 +64,7 @@ Error HashingContext::update(PackedByteArray p_chunk) {
 }
 
 PackedByteArray HashingContext::finish() {
-	ERR_FAIL_COND_V(ctx == NULL, PackedByteArray());
+	ERR_FAIL_COND_V(ctx == nullptr, PackedByteArray());
 	PackedByteArray out;
 	Error err = FAILED;
 	switch (type) {
@@ -99,7 +99,7 @@ void HashingContext::_create_ctx(HashType p_type) {
 			ctx = memnew(CryptoCore::SHA256Context);
 			break;
 		default:
-			ctx = NULL;
+			ctx = nullptr;
 	}
 }
 
@@ -116,7 +116,7 @@ void HashingContext::_delete_ctx() {
 			memdelete((CryptoCore::SHA256Context *)ctx);
 			break;
 	}
-	ctx = NULL;
+	ctx = nullptr;
 }
 
 void HashingContext::_bind_methods() {
@@ -129,10 +129,10 @@ void HashingContext::_bind_methods() {
 }
 
 HashingContext::HashingContext() {
-	ctx = NULL;
+	ctx = nullptr;
 }
 
 HashingContext::~HashingContext() {
-	if (ctx != NULL)
+	if (ctx != nullptr)
 		_delete_ctx();
 }

core/debugger/debugger_marshalls.cpp

@@ -227,7 +227,7 @@ Array DebuggerMarshalls::ScriptStackVariable::serialize(int max_size) {
 	}
 
 	int len = 0;
-	Error err = encode_variant(var, NULL, len, true);
+	Error err = encode_variant(var, nullptr, len, true);
 	if (err != OK)
 		ERR_PRINT("Failed to encode variant.");
 

core/debugger/engine_debugger.cpp

@@ -35,8 +35,8 @@
 #include "core/debugger/script_debugger.h"
 #include "core/os/os.h"
 
-EngineDebugger *EngineDebugger::singleton = NULL;
+EngineDebugger *EngineDebugger::singleton = nullptr;
-ScriptDebugger *EngineDebugger::script_debugger = NULL;
+ScriptDebugger *EngineDebugger::script_debugger = nullptr;
 
 Map<StringName, EngineDebugger::Profiler> EngineDebugger::profilers;
 Map<StringName, EngineDebugger::Capture> EngineDebugger::captures;
@@ -173,7 +173,7 @@ void EngineDebugger::deinitialize() {
 	singleton->poll_events(false);
 
 	memdelete(singleton);
-	singleton = NULL;
+	singleton = nullptr;
 	profilers.clear();
 	captures.clear();
 }
@@ -181,6 +181,6 @@ void EngineDebugger::deinitialize() {
 EngineDebugger::~EngineDebugger() {
 	if (script_debugger)
 		memdelete(script_debugger);
-	script_debugger = NULL;
+	script_debugger = nullptr;
-	singleton = NULL;
+	singleton = nullptr;
 }

core/debugger/engine_debugger.h

@@ -50,10 +50,10 @@ public:
 	class Profiler {
 		friend class EngineDebugger;
 
-		ProfilingToggle toggle = NULL;
+		ProfilingToggle toggle = nullptr;
-		ProfilingAdd add = NULL;
+		ProfilingAdd add = nullptr;
-		ProfilingTick tick = NULL;
+		ProfilingTick tick = nullptr;
-		void *data = NULL;
+		void *data = nullptr;
 		bool active = false;
 
 	public:
@@ -69,8 +69,8 @@ public:
 	class Capture {
 		friend class EngineDebugger;
 
-		CaptureFunc capture = NULL;
+		CaptureFunc capture = nullptr;
-		void *data = NULL;
+		void *data = nullptr;
 
 	public:
 		Capture() {}
@@ -97,7 +97,7 @@ protected:
 
 public:
 	_FORCE_INLINE_ static EngineDebugger *get_singleton() { return singleton; }
-	_FORCE_INLINE_ static bool is_active() { return singleton != NULL && script_debugger != NULL; }
+	_FORCE_INLINE_ static bool is_active() { return singleton != nullptr && script_debugger != nullptr; }
 
 	_FORCE_INLINE_ static ScriptDebugger *get_script_debugger() { return script_debugger; };
 

core/debugger/local_debugger.cpp

@@ -402,7 +402,7 @@ LocalDebugger::LocalDebugger() {
 			[](void *p_user, bool p_enable, const Array &p_opts) {
 				((ScriptsProfiler *)p_user)->toggle(p_enable, p_opts);
 			},
-			NULL,
+			nullptr,
 			[](void *p_user, float p_frame_time, float p_idle_time, float p_physics_time, float p_physics_frame_time) {
 				((ScriptsProfiler *)p_user)->tick(p_frame_time, p_idle_time, p_physics_time, p_physics_frame_time);
 			});

core/debugger/local_debugger.h

@@ -40,7 +40,7 @@ class LocalDebugger : public EngineDebugger {
 private:
 	struct ScriptsProfiler;
 
-	ScriptsProfiler *scripts_profiler = NULL;
+	ScriptsProfiler *scripts_profiler = nullptr;
 
 	String target_function;
 	Map<String, String> options;

core/debugger/remote_debugger.cpp

@@ -373,7 +373,7 @@ struct RemoteDebugger::VisualProfiler {
 
 struct RemoteDebugger::PerformanceProfiler {
 
-	Object *performance = NULL;
+	Object *performance = nullptr;
 	int last_perf_time = 0;
 
 	void toggle(bool p_enable, const Array &p_opts) {}
@@ -867,7 +867,7 @@ RemoteDebugger *RemoteDebugger::create_for_uri(const String &p_uri) {
 	Ref<RemoteDebuggerPeer> peer = RemoteDebuggerPeer::create_from_uri(p_uri);
 	if (peer.is_valid())
 		return memnew(RemoteDebugger(peer));
-	return NULL;
+	return nullptr;
 }
 
 RemoteDebugger::RemoteDebugger(Ref<RemoteDebuggerPeer> p_peer) {

core/debugger/remote_debugger.h

@@ -50,10 +50,10 @@ private:
 	struct VisualProfiler;
 	struct PerformanceProfiler;
 
-	NetworkProfiler *network_profiler = NULL;
+	NetworkProfiler *network_profiler = nullptr;
-	ServersProfiler *servers_profiler = NULL;
+	ServersProfiler *servers_profiler = nullptr;
-	VisualProfiler *visual_profiler = NULL;
+	VisualProfiler *visual_profiler = nullptr;
-	PerformanceProfiler *performance_profiler = NULL;
+	PerformanceProfiler *performance_profiler = nullptr;
 
 	Ref<RemoteDebuggerPeer> peer;
 

core/debugger/remote_debugger_peer.cpp

@@ -68,7 +68,7 @@ void RemoteDebuggerPeerTCP::close() {
 		running = false;
 		Thread::wait_to_finish(thread);
 		memdelete(thread);
-		thread = NULL;
+		thread = nullptr;
 	}
 	tcp_client->disconnect_from_host();
 	out_buf.resize(0);
@@ -106,7 +106,7 @@ void RemoteDebuggerPeerTCP::_write_out() {
 			out_queue.pop_front();
 			mutex.unlock();
 			int size = 0;
-			Error err = encode_variant(var, NULL, size);
+			Error err = encode_variant(var, nullptr, size);
 			ERR_CONTINUE(err != OK || size > out_buf.size() - 4); // 4 bytes separator.
 			encode_uint32(size, buf);
 			encode_variant(var, buf + 4, size);

core/debugger/remote_debugger_peer.h

@@ -58,7 +58,7 @@ class RemoteDebuggerPeerTCP : public RemoteDebuggerPeer {
 private:
 	Ref<StreamPeerTCP> tcp_client;
 	Mutex mutex;
-	Thread *thread = NULL;
+	Thread *thread = nullptr;
 	List<Array> in_queue;
 	List<Array> out_queue;
 	int out_left = 0;

core/debugger/script_debugger.h

@@ -47,7 +47,7 @@ class ScriptDebugger {
 
 	Map<int, Set<StringName>> breakpoints;
 
-	ScriptLanguage *break_lang = NULL;
+	ScriptLanguage *break_lang = nullptr;
 	Vector<StackInfo> error_stack_info;
 
 public:

core/dictionary.cpp

@@ -90,7 +90,7 @@ const Variant *Dictionary::getptr(const Variant &p_key) const {
 	OrderedHashMap<Variant, Variant, VariantHasher, VariantComparator>::ConstElement E = ((const OrderedHashMap<Variant, Variant, VariantHasher, VariantComparator> *)&_p->variant_map)->find(p_key);
 
 	if (!E)
-		return NULL;
+		return nullptr;
 	return &E.get();
 }
 
@@ -99,7 +99,7 @@ Variant *Dictionary::getptr(const Variant &p_key) {
 	OrderedHashMap<Variant, Variant, VariantHasher, VariantComparator>::Element E = _p->variant_map.find(p_key);
 
 	if (!E)
-		return NULL;
+		return nullptr;
 	return &E.get();
 }
 
@@ -186,7 +186,7 @@ void Dictionary::_unref() const {
 	if (_p->refcount.unref()) {
 		memdelete(_p);
 	}
-	_p = NULL;
+	_p = nullptr;
 }
 uint32_t Dictionary::hash() const {
 
@@ -236,17 +236,17 @@ Array Dictionary::values() const {
 
 const Variant *Dictionary::next(const Variant *p_key) const {
 
-	if (p_key == NULL) {
+	if (p_key == nullptr) {
 		// caller wants to get the first element
 		if (_p->variant_map.front())
 			return &_p->variant_map.front().key();
-		return NULL;
+		return nullptr;
 	}
 	OrderedHashMap<Variant, Variant, VariantHasher, VariantComparator>::Element E = _p->variant_map.find(*p_key);
 
 	if (E && E.next())
 		return &E.next().key();
-	return NULL;
+	return nullptr;
 }
 
 Dictionary Dictionary::duplicate(bool p_deep) const {
@@ -270,7 +270,7 @@ const void *Dictionary::id() const {
 }
 
 Dictionary::Dictionary(const Dictionary &p_from) {
-	_p = NULL;
+	_p = nullptr;
 	_ref(p_from);
 }
 

core/dictionary.h

@@ -75,7 +75,7 @@ public:
 	uint32_t hash() const;
 	void operator=(const Dictionary &p_dictionary);
 
-	const Variant *next(const Variant *p_key = NULL) const;
+	const Variant *next(const Variant *p_key = nullptr) const;
 
 	Array keys() const;
 	Array values() const;

core/engine.cpp

@@ -114,7 +114,7 @@ Dictionary Engine::get_version_info() const {
 
 static Array array_from_info(const char *const *info_list) {
 	Array arr;
-	for (int i = 0; info_list[i] != NULL; i++) {
+	for (int i = 0; info_list[i] != nullptr; i++) {
 		arr.push_back(info_list[i]);
 	}
 	return arr;
@@ -193,7 +193,7 @@ void Engine::add_singleton(const Singleton &p_singleton) {
 Object *Engine::get_singleton_object(const String &p_name) const {
 
 	const Map<StringName, Object *>::Element *E = singleton_ptrs.find(p_name);
-	ERR_FAIL_COND_V_MSG(!E, NULL, "Failed to retrieve non-existent singleton '" + p_name + "'.");
+	ERR_FAIL_COND_V_MSG(!E, nullptr, "Failed to retrieve non-existent singleton '" + p_name + "'.");
 	return E->get();
 };
 
@@ -208,7 +208,7 @@ void Engine::get_singletons(List<Singleton> *p_singletons) {
 		p_singletons->push_back(E->get());
 }
 
-Engine *Engine::singleton = NULL;
+Engine *Engine::singleton = nullptr;
 
 Engine *Engine::get_singleton() {
 	return singleton;

core/engine.h

@@ -42,7 +42,7 @@ public:
 	struct Singleton {
 		StringName name;
 		Object *ptr;
-		Singleton(const StringName &p_name = StringName(), Object *p_ptr = NULL) :
+		Singleton(const StringName &p_name = StringName(), Object *p_ptr = nullptr) :
 				name(p_name),
 				ptr(p_ptr) {
 		}

core/error_macros.cpp

@@ -34,7 +34,7 @@
 #include "core/ustring.h"
 #include "os/os.h"
 
-static ErrorHandlerList *error_handler_list = NULL;
+static ErrorHandlerList *error_handler_list = nullptr;
 
 void add_error_handler(ErrorHandlerList *p_handler) {
 
@@ -48,7 +48,7 @@ void remove_error_handler(ErrorHandlerList *p_handler) {
 
 	_global_lock();
 
-	ErrorHandlerList *prev = NULL;
+	ErrorHandlerList *prev = nullptr;
 	ErrorHandlerList *l = error_handler_list;
 
 	while (l) {

core/hash_map.h

@@ -197,14 +197,14 @@ private:
 			e = e->next;
 		}
 
-		return NULL;
+		return nullptr;
 	}
 
 	Element *create_element(const TKey &p_key) {
 
 		/* if element doesn't exist, create it */
 		Element *e = memnew(Element);
-		ERR_FAIL_COND_V_MSG(!e, NULL, "Out of memory.");
+		ERR_FAIL_COND_V_MSG(!e, nullptr, "Out of memory.");
 		uint32_t hash = Hasher::hash(p_key);
 		uint32_t index = hash & ((1 << hash_table_power) - 1);
 		e->next = hash_table[index];
@@ -234,7 +234,7 @@ private:
 
 		for (int i = 0; i < (1 << p_t.hash_table_power); i++) {
 
-			hash_table[i] = NULL;
+			hash_table[i] = nullptr;
 
 			const Element *e = p_t.hash_table[i];
 
@@ -260,7 +260,7 @@ public:
 
 	Element *set(const Pair &p_pair) {
 
-		Element *e = NULL;
+		Element *e = nullptr;
 		if (!hash_table)
 			make_hash_table(); // if no table, make one
 		else
@@ -272,7 +272,7 @@ public:
 
 			e = create_element(p_pair.key);
 			if (!e)
-				return NULL;
+				return nullptr;
 			check_hash_table(); // perform mantenience routine
 		}
 
@@ -282,12 +282,12 @@ public:
 
 	bool has(const TKey &p_key) const {
 
-		return getptr(p_key) != NULL;
+		return getptr(p_key) != nullptr;
 	}
 
 	/**
 	 * Get a key from data, return a const reference.
-	 * WARNING: this doesn't check errors, use either getptr and check NULL, or check
+	 * WARNING: this doesn't check errors, use either getptr and check nullptr, or check
 	 * first with has(key)
 	 */
 
@@ -306,38 +306,38 @@ public:
 	}
 
 	/**
-	 * Same as get, except it can return NULL when item was not found.
+	 * Same as get, except it can return nullptr  when item was not found.
 	 * This is mainly used for speed purposes.
 	 */
 
 	_FORCE_INLINE_ TData *getptr(const TKey &p_key) {
 
 		if (unlikely(!hash_table))
-			return NULL;
+			return nullptr;
 
 		Element *e = const_cast<Element *>(get_element(p_key));
 
 		if (e)
 			return &e->pair.data;
 
-		return NULL;
+		return nullptr;
 	}
 
 	_FORCE_INLINE_ const TData *getptr(const TKey &p_key) const {
 
 		if (unlikely(!hash_table))
-			return NULL;
+			return nullptr;
 
 		const Element *e = const_cast<Element *>(get_element(p_key));
 
 		if (e)
 			return &e->pair.data;
 
-		return NULL;
+		return nullptr;
 	}
 
 	/**
-	 * Same as get, except it can return NULL when item was not found.
+	 * Same as get, except it can return nullptr  when item was not found.
 	 * This version is custom, will take a hash and a custom key (that should support operator==()
 	 */
 
@@ -345,7 +345,7 @@ public:
 	_FORCE_INLINE_ TData *custom_getptr(C p_custom_key, uint32_t p_custom_hash) {
 
 		if (unlikely(!hash_table))
-			return NULL;
+			return nullptr;
 
 		uint32_t hash = p_custom_hash;
 		uint32_t index = hash & ((1 << hash_table_power) - 1);
@@ -364,14 +364,14 @@ public:
 			e = e->next;
 		}
 
-		return NULL;
+		return nullptr;
 	}
 
 	template <class C>
 	_FORCE_INLINE_ const TData *custom_getptr(C p_custom_key, uint32_t p_custom_hash) const {
 
 		if (unlikely(!hash_table))
-			return NULL;
+			return nullptr;
 
 		uint32_t hash = p_custom_hash;
 		uint32_t index = hash & ((1 << hash_table_power) - 1);
@@ -390,7 +390,7 @@ public:
 			e = e->next;
 		}
 
-		return NULL;
+		return nullptr;
 	}
 
 	/**
@@ -406,7 +406,7 @@ public:
 		uint32_t index = hash & ((1 << hash_table_power) - 1);
 
 		Element *e = hash_table[index];
-		Element *p = NULL;
+		Element *p = nullptr;
 		while (e) {
 
 			/* checking hash first avoids comparing key, which may take longer */
@@ -443,7 +443,7 @@ public:
 	}
 	inline TData &operator[](const TKey &p_key) { //assignment
 
-		Element *e = NULL;
+		Element *e = nullptr;
 		if (!hash_table)
 			make_hash_table(); // if no table, make one
 		else
@@ -462,12 +462,12 @@ public:
 
 	/**
 	 * Get the next key to p_key, and the first key if p_key is null.
-	 * Returns a pointer to the next key if found, NULL otherwise.
+	 * Returns a pointer to the next key if found, nullptr  otherwise.
 	 * Adding/Removing elements while iterating will, of course, have unexpected results, don't do it.
 	 *
 	 * Example:
 	 *
-	 * 	const TKey *k=NULL;
+	 * 	const TKey *k=nullptr;
 	 *
 	 * 	while( (k=table.next(k)) ) {
 	 *
@@ -478,7 +478,7 @@ public:
 	const TKey *next(const TKey *p_key) const {
 
 		if (unlikely(!hash_table))
-			return NULL;
+			return nullptr;
 
 		if (!p_key) { /* get the first key */
 
@@ -492,7 +492,7 @@ public:
 		} else { /* get the next key */
 
 			const Element *e = get_element(*p_key);
-			ERR_FAIL_COND_V_MSG(!e, NULL, "Invalid key supplied.");
+			ERR_FAIL_COND_V_MSG(!e, nullptr, "Invalid key supplied.");
 			if (e->next) {
 				/* if there is a "next" in the list, return that */
 				return &e->next->pair.key;
@@ -511,7 +511,7 @@ public:
 			/* nothing found, was at end */
 		}
 
-		return NULL; /* nothing found */
+		return nullptr; /* nothing found */
 	}
 
 	inline unsigned int size() const {
@@ -552,7 +552,7 @@ public:
 	}
 
 	HashMap() {
-		hash_table = NULL;
+		hash_table = nullptr;
 		elements = 0;
 		hash_table_power = 0;
 	}
@@ -586,7 +586,7 @@ public:
 
 	HashMap(const HashMap &p_table) {
 
-		hash_table = NULL;
+		hash_table = nullptr;
 		elements = 0;
 		hash_table_power = 0;
 

core/image.cpp

@@ -84,10 +84,10 @@ const char *Image::format_names[Image::FORMAT_MAX] = {
 
 };
 
-SavePNGFunc Image::save_png_func = NULL;
+SavePNGFunc Image::save_png_func = nullptr;
-SaveEXRFunc Image::save_exr_func = NULL;
+SaveEXRFunc Image::save_exr_func = nullptr;
 
-SavePNGBufferFunc Image::save_png_buffer_func = NULL;
+SavePNGBufferFunc Image::save_png_buffer_func = nullptr;
 
 void Image::_put_pixelb(int p_x, int p_y, uint32_t p_pixelsize, uint8_t *p_data, const uint8_t *p_pixel) {
 
@@ -2099,14 +2099,14 @@ Error Image::load(const String &p_path) {
 
 Error Image::save_png(const String &p_path) const {
 
-	if (save_png_func == NULL)
+	if (save_png_func == nullptr)
 		return ERR_UNAVAILABLE;
 
 	return save_png_func(p_path, Ref<Image>((Image *)this));
 }
 
 Vector<uint8_t> Image::save_png_to_buffer() const {
-	if (save_png_buffer_func == NULL) {
+	if (save_png_buffer_func == nullptr) {
 		return Vector<uint8_t>();
 	}
 
@@ -2115,7 +2115,7 @@ Vector<uint8_t> Image::save_png_to_buffer() const {
 
 Error Image::save_exr(const String &p_path, bool p_grayscale) const {
 
-	if (save_exr_func == NULL)
+	if (save_exr_func == nullptr)
 		return ERR_UNAVAILABLE;
 
 	return save_exr_func(p_path, Ref<Image>((Image *)this), p_grayscale);
@@ -2533,28 +2533,28 @@ void Image::fill(const Color &c) {
 	}
 }
 
-ImageMemLoadFunc Image::_png_mem_loader_func = NULL;
+ImageMemLoadFunc Image::_png_mem_loader_func = nullptr;
-ImageMemLoadFunc Image::_jpg_mem_loader_func = NULL;
+ImageMemLoadFunc Image::_jpg_mem_loader_func = nullptr;
-ImageMemLoadFunc Image::_webp_mem_loader_func = NULL;
+ImageMemLoadFunc Image::_webp_mem_loader_func = nullptr;
 
-void (*Image::_image_compress_bc_func)(Image *, float, Image::UsedChannels) = NULL;
+void (*Image::_image_compress_bc_func)(Image *, float, Image::UsedChannels) = nullptr;
-void (*Image::_image_compress_bptc_func)(Image *, float, Image::UsedChannels) = NULL;
+void (*Image::_image_compress_bptc_func)(Image *, float, Image::UsedChannels) = nullptr;
-void (*Image::_image_compress_pvrtc2_func)(Image *) = NULL;
+void (*Image::_image_compress_pvrtc2_func)(Image *) = nullptr;
-void (*Image::_image_compress_pvrtc4_func)(Image *) = NULL;
+void (*Image::_image_compress_pvrtc4_func)(Image *) = nullptr;
-void (*Image::_image_compress_etc1_func)(Image *, float) = NULL;
+void (*Image::_image_compress_etc1_func)(Image *, float) = nullptr;
-void (*Image::_image_compress_etc2_func)(Image *, float, Image::UsedChannels) = NULL;
+void (*Image::_image_compress_etc2_func)(Image *, float, Image::UsedChannels) = nullptr;
-void (*Image::_image_decompress_pvrtc)(Image *) = NULL;
+void (*Image::_image_decompress_pvrtc)(Image *) = nullptr;
-void (*Image::_image_decompress_bc)(Image *) = NULL;
+void (*Image::_image_decompress_bc)(Image *) = nullptr;
-void (*Image::_image_decompress_bptc)(Image *) = NULL;
+void (*Image::_image_decompress_bptc)(Image *) = nullptr;
-void (*Image::_image_decompress_etc1)(Image *) = NULL;
+void (*Image::_image_decompress_etc1)(Image *) = nullptr;
-void (*Image::_image_decompress_etc2)(Image *) = NULL;
+void (*Image::_image_decompress_etc2)(Image *) = nullptr;
 
-Vector<uint8_t> (*Image::lossy_packer)(const Ref<Image> &, float) = NULL;
+Vector<uint8_t> (*Image::lossy_packer)(const Ref<Image> &, float) = nullptr;
-Ref<Image> (*Image::lossy_unpacker)(const Vector<uint8_t> &) = NULL;
+Ref<Image> (*Image::lossy_unpacker)(const Vector<uint8_t> &) = nullptr;
-Vector<uint8_t> (*Image::lossless_packer)(const Ref<Image> &) = NULL;
+Vector<uint8_t> (*Image::lossless_packer)(const Ref<Image> &) = nullptr;
-Ref<Image> (*Image::lossless_unpacker)(const Vector<uint8_t> &) = NULL;
+Ref<Image> (*Image::lossless_unpacker)(const Vector<uint8_t> &) = nullptr;
-Vector<uint8_t> (*Image::basis_universal_packer)(const Ref<Image> &, Image::UsedChannels) = NULL;
+Vector<uint8_t> (*Image::basis_universal_packer)(const Ref<Image> &, Image::UsedChannels) = nullptr;
-Ref<Image> (*Image::basis_universal_unpacker)(const Vector<uint8_t> &) = NULL;
+Ref<Image> (*Image::basis_universal_unpacker)(const Vector<uint8_t> &) = nullptr;
 
 void Image::_set_data(const Dictionary &p_data) {
 

core/image.h

@@ -187,7 +187,7 @@ private:
 
 	_FORCE_INLINE_ void _get_mipmap_offset_and_size(int p_mipmap, int &r_offset, int &r_width, int &r_height) const; //get where the mipmap begins in data
 
-	static int _get_dst_image_size(int p_width, int p_height, Format p_format, int &r_mipmaps, int p_mipmaps = -1, int *r_mm_width = NULL, int *r_mm_height = NULL);
+	static int _get_dst_image_size(int p_width, int p_height, Format p_format, int &r_mipmaps, int p_mipmaps = -1, int *r_mm_width = nullptr, int *r_mm_height = nullptr);
 	bool _can_modify(Format p_format) const;
 
 	_FORCE_INLINE_ void _put_pixelb(int p_x, int p_y, uint32_t p_pixelsize, uint8_t *p_data, const uint8_t *p_pixel);

core/input/input_event.cpp

@@ -366,10 +366,10 @@ bool InputEventKey::action_match(const Ref<InputEvent> &p_event, bool *p_pressed
 		match = get_keycode() == key->get_keycode() && (!key->is_pressed() || (code & event_code) == code);
 	}
 	if (match) {
-		if (p_pressed != NULL)
+		if (p_pressed != nullptr)
 			*p_pressed = key->is_pressed();
-		if (p_strength != NULL)
+		if (p_strength != nullptr)
-			*p_strength = (p_pressed != NULL && *p_pressed) ? 1.0f : 0.0f;
+			*p_strength = (p_pressed != nullptr && *p_pressed) ? 1.0f : 0.0f;
 	}
 	return match;
 }
@@ -541,10 +541,10 @@ bool InputEventMouseButton::action_match(const Ref<InputEvent> &p_event, bool *p
 
 	bool match = mb->button_index == button_index;
 	if (match) {
-		if (p_pressed != NULL)
+		if (p_pressed != nullptr)
 			*p_pressed = mb->is_pressed();
-		if (p_strength != NULL)
+		if (p_strength != nullptr)
-			*p_strength = (p_pressed != NULL && *p_pressed) ? 1.0f : 0.0f;
+			*p_strength = (p_pressed != nullptr && *p_pressed) ? 1.0f : 0.0f;
 	}
 
 	return match;
@@ -815,9 +815,9 @@ bool InputEventJoypadMotion::action_match(const Ref<InputEvent> &p_event, bool *
 	if (match) {
 		bool same_direction = (((axis_value < 0) == (jm->axis_value < 0)) || jm->axis_value == 0);
 		bool pressed = same_direction ? Math::abs(jm->get_axis_value()) >= p_deadzone : false;
-		if (p_pressed != NULL)
+		if (p_pressed != nullptr)
 			*p_pressed = pressed;
-		if (p_strength != NULL) {
+		if (p_strength != nullptr) {
 			if (pressed) {
 				if (p_deadzone == 1.0f) {
 					*p_strength = 1.0f;
@@ -892,10 +892,10 @@ bool InputEventJoypadButton::action_match(const Ref<InputEvent> &p_event, bool *
 
 	bool match = button_index == jb->button_index;
 	if (match) {
-		if (p_pressed != NULL)
+		if (p_pressed != nullptr)
 			*p_pressed = jb->is_pressed();
-		if (p_strength != NULL)
+		if (p_strength != nullptr)
-			*p_strength = (p_pressed != NULL && *p_pressed) ? 1.0f : 0.0f;
+			*p_strength = (p_pressed != nullptr && *p_pressed) ? 1.0f : 0.0f;
 	}
 
 	return match;
@@ -1140,10 +1140,10 @@ bool InputEventAction::action_match(const Ref<InputEvent> &p_event, bool *p_pres
 
 	bool match = action == act->action;
 	if (match) {
-		if (p_pressed != NULL)
+		if (p_pressed != nullptr)
 			*p_pressed = act->pressed;
-		if (p_strength != NULL)
+		if (p_strength != nullptr)
-			*p_strength = (p_pressed != NULL && *p_pressed) ? 1.0f : 0.0f;
+			*p_strength = (p_pressed != nullptr && *p_pressed) ? 1.0f : 0.0f;
 	}
 	return match;
 }

core/input/input_filter.cpp

@@ -39,7 +39,7 @@
 #include "editor/editor_settings.h"
 #endif
 
-InputFilter *InputFilter::singleton = NULL;
+InputFilter *InputFilter::singleton = nullptr;
 
 void (*InputFilter::set_mouse_mode_func)(InputFilter::MouseMode) = nullptr;
 InputFilter::MouseMode (*InputFilter::get_mouse_mode_func)() = nullptr;
@@ -1028,9 +1028,9 @@ void InputFilter::_axis_event(int p_device, int p_axis, float p_value) {
 InputFilter::JoyEvent InputFilter::_find_to_event(String p_to) {
 
 	// string names of the SDL buttons in the same order as input_event.h godot buttons
-	static const char *buttons[] = { "a", "b", "x", "y", "leftshoulder", "rightshoulder", "lefttrigger", "righttrigger", "leftstick", "rightstick", "back", "start", "dpup", "dpdown", "dpleft", "dpright", "guide", NULL };
+	static const char *buttons[] = { "a", "b", "x", "y", "leftshoulder", "rightshoulder", "lefttrigger", "righttrigger", "leftstick", "rightstick", "back", "start", "dpup", "dpdown", "dpleft", "dpright", "guide", nullptr };
 
-	static const char *axis[] = { "leftx", "lefty", "rightx", "righty", NULL };
+	static const char *axis[] = { "leftx", "lefty", "rightx", "righty", nullptr };
 
 	JoyEvent ret;
 	ret.type = -1;

core/input/input_map.cpp

@@ -33,7 +33,7 @@
 #include "core/os/keyboard.h"
 #include "core/project_settings.h"
 
-InputMap *InputMap::singleton = NULL;
+InputMap *InputMap::singleton = nullptr;
 
 int InputMap::ALL_DEVICES = -1;
 
@@ -116,7 +116,7 @@ List<Ref<InputEvent>>::Element *InputMap::_find_event(Action &p_action, const Re
 		}
 	}
 
-	return NULL;
+	return nullptr;
 }
 
 bool InputMap::has_action(const StringName &p_action) const {
@@ -144,7 +144,7 @@ void InputMap::action_add_event(const StringName &p_action, const Ref<InputEvent
 bool InputMap::action_has_event(const StringName &p_action, const Ref<InputEvent> &p_event) {
 
 	ERR_FAIL_COND_V_MSG(!input_map.has(p_action), false, "Request for nonexistent InputMap action '" + String(p_action) + "'.");
-	return (_find_event(input_map[p_action], p_event) != NULL);
+	return (_find_event(input_map[p_action], p_event) != nullptr);
 }
 
 void InputMap::action_erase_event(const StringName &p_action, const Ref<InputEvent> &p_event) {
@@ -181,7 +181,7 @@ const List<Ref<InputEvent>> *InputMap::get_action_list(const StringName &p_actio
 
 	const Map<StringName, Action>::Element *E = input_map.find(p_action);
 	if (!E)
-		return NULL;
+		return nullptr;
 
 	return &E->get().inputs;
 }
@@ -196,20 +196,20 @@ bool InputMap::event_get_action_status(const Ref<InputEvent> &p_event, const Str
 
 	Ref<InputEventAction> input_event_action = p_event;
 	if (input_event_action.is_valid()) {
-		if (p_pressed != NULL)
+		if (p_pressed != nullptr)
 			*p_pressed = input_event_action->is_pressed();
-		if (p_strength != NULL)
+		if (p_strength != nullptr)
-			*p_strength = (p_pressed != NULL && *p_pressed) ? input_event_action->get_strength() : 0.0f;
+			*p_strength = (p_pressed != nullptr && *p_pressed) ? input_event_action->get_strength() : 0.0f;
 		return input_event_action->get_action() == p_action;
 	}
 
 	bool pressed;
 	float strength;
 	List<Ref<InputEvent>>::Element *event = _find_event(E->get(), p_event, &pressed, &strength);
-	if (event != NULL) {
+	if (event != nullptr) {
-		if (p_pressed != NULL)
+		if (p_pressed != nullptr)
 			*p_pressed = pressed;
-		if (p_strength != NULL)
+		if (p_strength != nullptr)
 			*p_strength = strength;
 		return true;
 	} else {

core/input/input_map.h

@@ -55,7 +55,7 @@ private:
 
 	mutable Map<StringName, Action> input_map;
 
-	List<Ref<InputEvent>>::Element *_find_event(Action &p_action, const Ref<InputEvent> &p_event, bool *p_pressed = NULL, float *p_strength = NULL) const;
+	List<Ref<InputEvent>>::Element *_find_event(Action &p_action, const Ref<InputEvent> &p_event, bool *p_pressed = nullptr, float *p_strength = nullptr) const;
 
 	Array _get_action_list(const StringName &p_action);
 	Array _get_actions();
@@ -79,7 +79,7 @@ public:
 
 	const List<Ref<InputEvent>> *get_action_list(const StringName &p_action);
 	bool event_is_action(const Ref<InputEvent> &p_event, const StringName &p_action) const;
-	bool event_get_action_status(const Ref<InputEvent> &p_event, const StringName &p_action, bool *p_pressed = NULL, float *p_strength = NULL) const;
+	bool event_get_action_status(const Ref<InputEvent> &p_event, const StringName &p_action, bool *p_pressed = nullptr, float *p_strength = nullptr) const;
 
 	const Map<StringName, Action> &get_action_map() const;
 	void load_from_globals();

core/io/config_file.cpp

@@ -290,7 +290,7 @@ Error ConfigFile::_parse(const String &p_path, VariantParser::Stream *p_stream)
 		next_tag.fields.clear();
 		next_tag.name = String();
 
-		Error err = VariantParser::parse_tag_assign_eof(p_stream, lines, error_text, next_tag, assign, value, NULL, true);
+		Error err = VariantParser::parse_tag_assign_eof(p_stream, lines, error_text, next_tag, assign, value, nullptr, true);
 		if (err == ERR_FILE_EOF) {
 			return OK;
 		} else if (err != OK) {

core/io/dtls_server.cpp

@@ -32,7 +32,7 @@
 #include "core/os/file_access.h"
 #include "core/project_settings.h"
 
-DTLSServer *(*DTLSServer::_create)() = NULL;
+DTLSServer *(*DTLSServer::_create)() = nullptr;
 bool DTLSServer::available = false;
 
 DTLSServer *DTLSServer::create() {

core/io/file_access_compressed.cpp

@@ -64,7 +64,7 @@ Error FileAccessCompressed::open_after_magic(FileAccess *p_base) {
 	cmode = (Compression::Mode)f->get_32();
 	block_size = f->get_32();
 	if (block_size == 0) {
-		f = NULL; // Let the caller to handle the FileAccess object if failed to open as compressed file.
+		f = nullptr; // Let the caller to handle the FileAccess object if failed to open as compressed file.
 		ERR_FAIL_V_MSG(ERR_FILE_CORRUPT, "Can't open compressed file '" + p_base->get_path() + "' with block size 0, it is corrupted.");
 	}
 	read_total = f->get_32();
@@ -109,7 +109,7 @@ Error FileAccessCompressed::_open(const String &p_path, int p_mode_flags) {
 	if (err != OK) {
 		//not openable
 
-		f = NULL;
+		f = nullptr;
 		return err;
 	}
 
@@ -131,7 +131,7 @@ Error FileAccessCompressed::_open(const String &p_path, int p_mode_flags) {
 		rmagic[4] = 0;
 		if (magic != rmagic || open_after_magic(f) != OK) {
 			memdelete(f);
-			f = NULL;
+			f = nullptr;
 			return ERR_FILE_UNRECOGNIZED;
 		}
 	}
@@ -187,12 +187,12 @@ void FileAccessCompressed::close() {
 	}
 
 	memdelete(f);
-	f = NULL;
+	f = nullptr;
 }
 
 bool FileAccessCompressed::is_open() const {
 
-	return f != NULL;
+	return f != nullptr;
 }
 
 void FileAccessCompressed::seek(size_t p_position) {
@@ -392,20 +392,20 @@ Error FileAccessCompressed::_set_unix_permissions(const String &p_file, uint32_t
 FileAccessCompressed::FileAccessCompressed() :
 		cmode(Compression::MODE_ZSTD),
 		writing(false),
-		write_ptr(0),
+		write_ptr(nullptr),
 		write_buffer_size(0),
 		write_max(0),
 		block_size(0),
 		read_eof(false),
 		at_end(false),
-		read_ptr(NULL),
+		read_ptr(nullptr),
 		read_block(0),
 		read_block_count(0),
 		read_block_size(0),
 		read_pos(0),
 		read_total(0),
 		magic("GCMP"),
-		f(NULL) {
+		f(nullptr) {
 }
 
 FileAccessCompressed::~FileAccessCompressed() {

core/io/file_access_encrypted.cpp

@@ -41,7 +41,7 @@
 
 Error FileAccessEncrypted::open_and_parse(FileAccess *p_base, const Vector<uint8_t> &p_key, Mode p_mode) {
 
-	ERR_FAIL_COND_V_MSG(file != NULL, ERR_ALREADY_IN_USE, "Can't open file while another file from path '" + file->get_path_absolute() + "' is open.");
+	ERR_FAIL_COND_V_MSG(file != nullptr, ERR_ALREADY_IN_USE, "Can't open file while another file from path '" + file->get_path_absolute() + "' is open.");
 	ERR_FAIL_COND_V(p_key.size() != 32, ERR_INVALID_PARAMETER);
 
 	pos = 0;
@@ -159,7 +159,7 @@ void FileAccessEncrypted::close() {
 		file->store_buffer(compressed.ptr(), compressed.size());
 		file->close();
 		memdelete(file);
-		file = NULL;
+		file = nullptr;
 		data.clear();
 
 	} else {
@@ -167,13 +167,13 @@ void FileAccessEncrypted::close() {
 		file->close();
 		memdelete(file);
 		data.clear();
-		file = NULL;
+		file = nullptr;
 	}
 }
 
 bool FileAccessEncrypted::is_open() const {
 
-	return file != NULL;
+	return file != nullptr;
 }
 
 String FileAccessEncrypted::get_path() const {
@@ -319,7 +319,7 @@ Error FileAccessEncrypted::_set_unix_permissions(const String &p_file, uint32_t
 
 FileAccessEncrypted::FileAccessEncrypted() {
 
-	file = NULL;
+	file = nullptr;
 	pos = 0;
 	eofed = false;
 	mode = MODE_MAX;

core/io/file_access_memory.cpp

@@ -35,7 +35,7 @@
 #include "core/os/dir_access.h"
 #include "core/project_settings.h"
 
-static Map<String, Vector<uint8_t>> *files = NULL;
+static Map<String, Vector<uint8_t>> *files = nullptr;
 
 void FileAccessMemory::register_file(String p_name, Vector<uint8_t> p_data) {
 
@@ -71,7 +71,7 @@ bool FileAccessMemory::file_exists(const String &p_name) {
 	String name = fix_path(p_name);
 	//name = DirAccess::normalize_path(name);
 
-	return files && (files->find(name) != NULL);
+	return files && (files->find(name) != nullptr);
 }
 
 Error FileAccessMemory::open_custom(const uint8_t *p_data, int p_len) {
@@ -101,12 +101,12 @@ Error FileAccessMemory::_open(const String &p_path, int p_mode_flags) {
 
 void FileAccessMemory::close() {
 
-	data = NULL;
+	data = nullptr;
 }
 
 bool FileAccessMemory::is_open() const {
 
-	return data != NULL;
+	return data != nullptr;
 }
 
 void FileAccessMemory::seek(size_t p_position) {
@@ -196,5 +196,5 @@ void FileAccessMemory::store_buffer(const uint8_t *p_src, int p_length) {
 
 FileAccessMemory::FileAccessMemory() {
 
-	data = NULL;
+	data = nullptr;
 }

core/io/file_access_network.cpp

@@ -114,7 +114,7 @@ void FileAccessNetworkClient::_thread_func() {
 		int response = get_32();
 		DEBUG_PRINT("GET RESPONSE: " + itos(response));
 
-		FileAccessNetwork *fa = NULL;
+		FileAccessNetwork *fa = nullptr;
 
 		if (response != FileAccessNetwork::RESPONSE_DATA) {
 			if (!accesses.has(id)) {
@@ -219,11 +219,11 @@ Error FileAccessNetworkClient::connect(const String &p_host, int p_port, const S
 	return OK;
 }
 
-FileAccessNetworkClient *FileAccessNetworkClient::singleton = NULL;
+FileAccessNetworkClient *FileAccessNetworkClient::singleton = nullptr;
 
 FileAccessNetworkClient::FileAccessNetworkClient() {
 
-	thread = NULL;
+	thread = nullptr;
 	quit = false;
 	singleton = this;
 	last_id = 0;
@@ -295,7 +295,7 @@ Error FileAccessNetwork::_open(const String &p_path, int p_mode_flags) {
 	pos = 0;
 	eof_flag = false;
 	last_page = -1;
-	last_page_buff = NULL;
+	last_page_buff = nullptr;
 
 	//buffers.clear();
 	nc->unlock_mutex();

core/io/file_access_pack.cpp

@@ -98,18 +98,18 @@ void PackedData::add_path(const String &pkg_path, const String &path, uint64_t o
 
 void PackedData::add_pack_source(PackSource *p_source) {
 
-	if (p_source != NULL) {
+	if (p_source != nullptr) {
 		sources.push_back(p_source);
 	}
 };
 
-PackedData *PackedData::singleton = NULL;
+PackedData *PackedData::singleton = nullptr;
 
 PackedData::PackedData() {
 
 	singleton = this;
 	root = memnew(PackedDir);
-	root->parent = NULL;
+	root->parent = nullptr;
 	disabled = false;
 
 	add_pack_source(memnew(PackedSourcePCK));

core/io/file_access_pack.h

@@ -185,9 +185,9 @@ FileAccess *PackedData::try_open_path(const String &p_path) {
 	PathMD5 pmd5(p_path.md5_buffer());
 	Map<PathMD5, PackedFile>::Element *E = files.find(pmd5);
 	if (!E)
-		return NULL; //not found
+		return nullptr; //not found
 	if (E->get().offset == 0)
-		return NULL; //was erased
+		return nullptr; //was erased
 
 	return E->get().src->get_file(p_path, &E->get());
 }

core/io/file_access_zip.cpp

@@ -35,20 +35,20 @@
 #include "core/os/copymem.h"
 #include "core/os/file_access.h"
 
-ZipArchive *ZipArchive::instance = NULL;
+ZipArchive *ZipArchive::instance = nullptr;
 
 extern "C" {
 
 static void *godot_open(void *data, const char *p_fname, int mode) {
 
 	if (mode & ZLIB_FILEFUNC_MODE_WRITE) {
-		return NULL;
+		return nullptr;
 	}
 
 	FileAccess *f = (FileAccess *)data;
 	f->open(p_fname, FileAccess::READ);
 
-	return f->is_open() ? data : NULL;
+	return f->is_open() ? data : nullptr;
 }
 
 static uLong godot_read(void *data, void *fdata, void *buf, uLong size) {
@@ -126,11 +126,11 @@ void ZipArchive::close_handle(unzFile p_file) const {
 
 unzFile ZipArchive::get_file_handle(String p_file) const {
 
-	ERR_FAIL_COND_V_MSG(!file_exists(p_file), NULL, "File '" + p_file + " doesn't exist.");
+	ERR_FAIL_COND_V_MSG(!file_exists(p_file), nullptr, "File '" + p_file + " doesn't exist.");
 	File file = files[p_file];
 
 	FileAccess *f = FileAccess::open(packages[file.package].filename, FileAccess::READ);
-	ERR_FAIL_COND_V_MSG(!f, NULL, "Cannot open file '" + packages[file.package].filename + "'.");
+	ERR_FAIL_COND_V_MSG(!f, nullptr, "Cannot open file '" + packages[file.package].filename + "'.");
 
 	zlib_filefunc_def io;
 	zeromem(&io, sizeof(io));
@@ -149,12 +149,12 @@ unzFile ZipArchive::get_file_handle(String p_file) const {
 	io.free_mem = godot_free;
 
 	unzFile pkg = unzOpen2(packages[file.package].filename.utf8().get_data(), &io);
-	ERR_FAIL_COND_V(!pkg, NULL);
+	ERR_FAIL_COND_V(!pkg, nullptr);
 	int unz_err = unzGoToFilePos(pkg, &file.file_pos);
 	if (unz_err != UNZ_OK || unzOpenCurrentFile(pkg) != UNZ_OK) {
 
 		unzClose(pkg);
-		ERR_FAIL_V(NULL);
+		ERR_FAIL_V(nullptr);
 	}
 
 	return pkg;
@@ -199,7 +199,7 @@ bool ZipArchive::try_open_pack(const String &p_path, bool p_replace_files) {
 		char filename_inzip[256];
 
 		unz_file_info64 file_info;
-		err = unzGetCurrentFileInfo64(zfile, &file_info, filename_inzip, sizeof(filename_inzip), NULL, 0, NULL, 0);
+		err = unzGetCurrentFileInfo64(zfile, &file_info, filename_inzip, sizeof(filename_inzip), nullptr, 0, nullptr, 0);
 		ERR_CONTINUE(err != UNZ_OK);
 
 		File f;
@@ -233,7 +233,7 @@ FileAccess *ZipArchive::get_file(const String &p_path, PackedData::PackedFile *p
 
 ZipArchive *ZipArchive::get_singleton() {
 
-	if (instance == NULL) {
+	if (instance == nullptr) {
 		instance = memnew(ZipArchive);
 	}
 
@@ -268,7 +268,7 @@ Error FileAccessZip::_open(const String &p_path, int p_mode_flags) {
 	zfile = arch->get_file_handle(p_path);
 	ERR_FAIL_COND_V(!zfile, FAILED);
 
-	int err = unzGetCurrentFileInfo64(zfile, &file_info, NULL, 0, NULL, 0, NULL, 0);
+	int err = unzGetCurrentFileInfo64(zfile, &file_info, nullptr, 0, nullptr, 0, nullptr, 0);
 	ERR_FAIL_COND_V(err != UNZ_OK, FAILED);
 
 	return OK;
@@ -282,12 +282,12 @@ void FileAccessZip::close() {
 	ZipArchive *arch = ZipArchive::get_singleton();
 	ERR_FAIL_COND(!arch);
 	arch->close_handle(zfile);
-	zfile = NULL;
+	zfile = nullptr;
 }
 
 bool FileAccessZip::is_open() const {
 
-	return zfile != NULL;
+	return zfile != nullptr;
 }
 
 void FileAccessZip::seek(size_t p_position) {
@@ -370,7 +370,7 @@ bool FileAccessZip::file_exists(const String &p_name) {
 }
 
 FileAccessZip::FileAccessZip(const String &p_path, const PackedData::PackedFile &p_file) :
-		zfile(NULL) {
+		zfile(nullptr) {
 	_open(p_path, FileAccess::READ);
 }
 

core/io/image_loader.cpp

@@ -100,7 +100,7 @@ ImageFormatLoader *ImageLoader::recognize(const String &p_extension) {
 			return loader[i];
 	}
 
-	return NULL;
+	return nullptr;
 }
 
 Vector<ImageFormatLoader *> ImageLoader::loader;

core/io/image_loader.h

@@ -59,7 +59,7 @@ class ImageLoader {
 
 protected:
 public:
-	static Error load_image(String p_file, Ref<Image> p_image, FileAccess *p_custom = NULL, bool p_force_linear = false, float p_scale = 1.0);
+	static Error load_image(String p_file, Ref<Image> p_image, FileAccess *p_custom = nullptr, bool p_force_linear = false, float p_scale = 1.0);
 	static void get_recognized_extensions(List<String> *p_extensions);
 	static ImageFormatLoader *recognize(const String &p_extension);
 
@@ -73,7 +73,7 @@ public:
 
 class ResourceFormatLoaderImage : public ResourceFormatLoader {
 public:
-	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = NULL, bool p_use_sub_threads = false, float *r_progress = nullptr);
+	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = nullptr, bool p_use_sub_threads = false, float *r_progress = nullptr);
 	virtual void get_recognized_extensions(List<String> *p_extensions) const;
 	virtual bool handles_type(const String &p_type) const;
 	virtual String get_resource_type(const String &p_path) const;

core/io/ip.cpp

@@ -280,19 +280,19 @@ void IP::_bind_methods() {
 	BIND_ENUM_CONSTANT(TYPE_ANY);
 }
 
-IP *IP::singleton = NULL;
+IP *IP::singleton = nullptr;
 
 IP *IP::get_singleton() {
 
 	return singleton;
 }
 
-IP *(*IP::_create)() = NULL;
+IP *(*IP::_create)() = nullptr;
 
 IP *IP::create() {
 
-	ERR_FAIL_COND_V_MSG(singleton, NULL, "IP singleton already exist.");
+	ERR_FAIL_COND_V_MSG(singleton, nullptr, "IP singleton already exist.");
-	ERR_FAIL_COND_V(!_create, NULL);
+	ERR_FAIL_COND_V(!_create, nullptr);
 	return _create();
 }
 
@@ -307,7 +307,7 @@ IP::IP() {
 
 	resolver->thread = Thread::create(_IP_ResolverPrivate::_thread_function, resolver);
 #else
-	resolver->thread = NULL;
+	resolver->thread = nullptr;
 #endif
 }
 

core/io/logger.cpp

@@ -108,7 +108,7 @@ Logger::~Logger() {}
 void RotatedFileLogger::close_file() {
 	if (file) {
 		memdelete(file);
-		file = NULL;
+		file = nullptr;
 	}
 }
 
@@ -182,7 +182,7 @@ void RotatedFileLogger::rotate_file() {
 RotatedFileLogger::RotatedFileLogger(const String &p_base_path, int p_max_files) :
 		base_path(p_base_path.simplify_path()),
 		max_files(p_max_files > 0 ? p_max_files : 1),
-		file(NULL) {
+		file(nullptr) {
 	rotate_file();
 }
 

core/io/marshalls.cpp

@@ -439,7 +439,7 @@ Error decode_variant(Variant &r_variant, const uint8_t *p_buffer, int p_len, int
 					(*r_len) += 8;
 
 				if (val.is_null()) {
-					r_variant = (Object *)NULL;
+					r_variant = (Object *)nullptr;
 				} else {
 					Ref<EncodedObjectAsID> obj_as_id;
 					obj_as_id.instance();
@@ -457,7 +457,7 @@ Error decode_variant(Variant &r_variant, const uint8_t *p_buffer, int p_len, int
 					return err;
 
 				if (str == String()) {
-					r_variant = (Object *)NULL;
+					r_variant = (Object *)nullptr;
 				} else {
 
 					Object *obj = ClassDB::instance(str);
@@ -917,7 +917,7 @@ Error encode_variant(const Variant &p_variant, uint8_t *r_buffer, int &r_len, bo
 			// Test for potential wrong values sent by the debugger when it breaks.
 			Object *obj = p_variant.get_validated_object();
 			if (!obj) {
-				// Object is invalid, send a NULL instead.
+				// Object is invalid, send a nullptr  instead.
 				if (buf) {
 					encode_uint32(Variant::NIL, buf);
 				}

core/io/marshalls.h

@@ -199,7 +199,7 @@ public:
 	EncodedObjectAsID();
 };
 
-Error decode_variant(Variant &r_variant, const uint8_t *p_buffer, int p_len, int *r_len = NULL, bool p_allow_objects = false);
+Error decode_variant(Variant &r_variant, const uint8_t *p_buffer, int p_len, int *r_len = nullptr, bool p_allow_objects = false);
 Error encode_variant(const Variant &p_variant, uint8_t *r_buffer, int &r_len, bool p_full_objects = false);
 
 #endif // MARSHALLS_H

core/io/multiplayer_api.cpp

@@ -207,7 +207,7 @@ int get_packet_len(uint32_t p_node_target, int p_packet_len) {
 
 void MultiplayerAPI::_process_packet(int p_from, const uint8_t *p_packet, int p_packet_len) {
 
-	ERR_FAIL_COND_MSG(root_node == NULL, "Multiplayer root node was not initialized. If you are using custom multiplayer, remember to set the root node via MultiplayerAPI.set_root_node before using it.");
+	ERR_FAIL_COND_MSG(root_node == nullptr, "Multiplayer root node was not initialized. If you are using custom multiplayer, remember to set the root node via MultiplayerAPI.set_root_node before using it.");
 	ERR_FAIL_COND_MSG(p_packet_len < 1, "Invalid packet received. Size too small.");
 
 #ifdef DEBUG_ENABLED
@@ -285,7 +285,7 @@ void MultiplayerAPI::_process_packet(int p_from, const uint8_t *p_packet, int p_
 			}
 
 			Node *node = _process_get_node(p_from, p_packet, node_target, p_packet_len);
-			ERR_FAIL_COND_MSG(node == NULL, "Invalid packet received. Requested node was not found.");
+			ERR_FAIL_COND_MSG(node == nullptr, "Invalid packet received. Requested node was not found.");
 
 			uint16_t name_id = 0;
 			switch (name_id_compression) {
@@ -321,14 +321,14 @@ void MultiplayerAPI::_process_packet(int p_from, const uint8_t *p_packet, int p_
 
 Node *MultiplayerAPI::_process_get_node(int p_from, const uint8_t *p_packet, uint32_t p_node_target, int p_packet_len) {
 
-	Node *node = NULL;
+	Node *node = nullptr;
 
 	if (p_node_target & 0x80000000) {
 		// Use full path (not cached yet).
 
 		int ofs = p_node_target & 0x7FFFFFFF;
 
-		ERR_FAIL_COND_V_MSG(ofs >= p_packet_len, NULL, "Invalid packet received. Size smaller than declared.");
+		ERR_FAIL_COND_V_MSG(ofs >= p_packet_len, nullptr, "Invalid packet received. Size smaller than declared.");
 
 		String paths;
 		paths.parse_utf8((const char *)&p_packet[ofs], p_packet_len - ofs);
@@ -344,10 +344,10 @@ Node *MultiplayerAPI::_process_get_node(int p_from, const uint8_t *p_packet, uin
 		int id = p_node_target;
 
 		Map<int, PathGetCache>::Element *E = path_get_cache.find(p_from);
-		ERR_FAIL_COND_V_MSG(!E, NULL, "Invalid packet received. Requests invalid peer cache.");
+		ERR_FAIL_COND_V_MSG(!E, nullptr, "Invalid packet received. Requests invalid peer cache.");
 
 		Map<int, PathGetCache::NodeInfo>::Element *F = E->get().nodes.find(id);
-		ERR_FAIL_COND_V_MSG(!F, NULL, "Invalid packet received. Unabled to find requested cached node.");
+		ERR_FAIL_COND_V_MSG(!F, nullptr, "Invalid packet received. Unabled to find requested cached node.");
 
 		PathGetCache::NodeInfo *ni = &F->get();
 		// Do proper caching later.
@@ -456,7 +456,7 @@ void MultiplayerAPI::_process_rset(Node *p_node, const uint16_t p_rpc_property_i
 #endif
 
 	Variant value;
-	Error err = _decode_and_decompress_variant(value, &p_packet[p_offset], p_packet_len - p_offset, NULL);
+	Error err = _decode_and_decompress_variant(value, &p_packet[p_offset], p_packet_len - p_offset, nullptr);
 
 	ERR_FAIL_COND_MSG(err != OK, "Invalid packet received. Unable to decode RSET value.");
 
@@ -491,7 +491,7 @@ void MultiplayerAPI::_process_simplify_path(int p_from, const uint8_t *p_packet,
 	}
 
 	Node *node = root_node->get_node(path);
-	ERR_FAIL_COND(node == NULL);
+	ERR_FAIL_COND(node == nullptr);
 	const bool valid_rpc_checksum = node->get_rpc_md5() == methods_md5;
 	if (valid_rpc_checksum == false) {
 		ERR_PRINT("The rpc node checksum failed. Make sure to have the same methods on both nodes. Node path: " + path);
@@ -504,7 +504,7 @@ void MultiplayerAPI::_process_simplify_path(int p_from, const uint8_t *p_packet,
 
 	// Encode path to send ack.
 	CharString pname = String(path).utf8();
-	int len = encode_cstring(pname.get_data(), NULL);
+	int len = encode_cstring(pname.get_data(), nullptr);
 
 	Vector<uint8_t> packet;
 
@@ -572,7 +572,7 @@ bool MultiplayerAPI::_send_confirm_path(Node *p_node, NodePath p_path, PathSentC
 
 		// Encode function name.
 		const CharString path = String(p_path).utf8();
-		const int path_len = encode_cstring(path.get_data(), NULL);
+		const int path_len = encode_cstring(path.get_data(), nullptr);
 
 		// Extract MD5 from rpc methods list.
 		const String methods_md5 = p_node->get_rpc_md5();
@@ -862,7 +862,7 @@ void MultiplayerAPI::_send_rpc(Node *p_from, int p_to, bool p_unreliable, bool p
 
 		// Set argument.
 		int len(0);
-		Error err = _encode_and_compress_variant(*p_arg[0], NULL, len);
+		Error err = _encode_and_compress_variant(*p_arg[0], nullptr, len);
 		ERR_FAIL_COND_MSG(err != OK, "Unable to encode RSET value. THIS IS LIKELY A BUG IN THE ENGINE!");
 		MAKE_ROOM(ofs + len);
 		_encode_and_compress_variant(*p_arg[0], &(packet_cache.write[ofs]), len);
@@ -907,7 +907,7 @@ void MultiplayerAPI::_send_rpc(Node *p_from, int p_to, bool p_unreliable, bool p
 			ofs += 1;
 			for (int i = 0; i < p_argcount; i++) {
 				int len(0);
-				Error err = _encode_and_compress_variant(*p_arg[i], NULL, len);
+				Error err = _encode_and_compress_variant(*p_arg[i], nullptr, len);
 				ERR_FAIL_COND_MSG(err != OK, "Unable to encode RPC argument. THIS IS LIKELY A BUG IN THE ENGINE!");
 				MAKE_ROOM(ofs + len);
 				_encode_and_compress_variant(*p_arg[i], &(packet_cache.write[ofs]), len);
@@ -943,7 +943,7 @@ void MultiplayerAPI::_send_rpc(Node *p_from, int p_to, bool p_unreliable, bool p
 
 		// Append path at the end, since we will need it for some packets.
 		CharString pname = String(from_path).utf8();
-		int path_len = encode_cstring(pname.get_data(), NULL);
+		int path_len = encode_cstring(pname.get_data(), nullptr);
 		MAKE_ROOM(ofs + path_len);
 		encode_cstring(pname.get_data(), &(packet_cache.write[ofs]));
 
@@ -1262,7 +1262,7 @@ void MultiplayerAPI::_bind_methods() {
 MultiplayerAPI::MultiplayerAPI() :
 		allow_object_decoding(false) {
 	rpc_sender_id = 0;
-	root_node = NULL;
+	root_node = nullptr;
 	clear();
 }
 

core/io/net_socket.cpp

@@ -30,7 +30,7 @@
 
 #include "net_socket.h"
 
-NetSocket *(*NetSocket::_create)() = NULL;
+NetSocket *(*NetSocket::_create)() = nullptr;
 
 NetSocket *NetSocket::create() {
 
@@ -38,5 +38,5 @@ NetSocket *NetSocket::create() {
 		return _create();
 
 	ERR_PRINT("Unable to create network socket, platform not supported");
-	return NULL;
+	return nullptr;
 }

core/io/packet_peer.cpp

@@ -90,13 +90,13 @@ Error PacketPeer::get_var(Variant &r_variant, bool p_allow_objects) {
 	if (err)
 		return err;
 
-	return decode_variant(r_variant, buffer, buffer_size, NULL, p_allow_objects);
+	return decode_variant(r_variant, buffer, buffer_size, nullptr, p_allow_objects);
 }
 
 Error PacketPeer::put_var(const Variant &p_packet, bool p_full_objects) {
 
 	int len;
-	Error err = encode_variant(p_packet, NULL, len, p_full_objects); // compute len first
+	Error err = encode_variant(p_packet, nullptr, len, p_full_objects); // compute len first
 	if (err)
 		return err;
 

core/io/packet_peer_dtls.cpp

@@ -32,7 +32,7 @@
 #include "core/os/file_access.h"
 #include "core/project_settings.h"
 
-PacketPeerDTLS *(*PacketPeerDTLS::_create)() = NULL;
+PacketPeerDTLS *(*PacketPeerDTLS::_create)() = nullptr;
 bool PacketPeerDTLS::available = false;
 
 PacketPeerDTLS *PacketPeerDTLS::create() {

core/io/pck_packer.cpp

@@ -63,7 +63,7 @@ void PCKPacker::_bind_methods() {
 
 Error PCKPacker::pck_start(const String &p_file, int p_alignment) {
 
-	if (file != NULL) {
+	if (file != nullptr) {
 		memdelete(file);
 	}
 
@@ -182,12 +182,12 @@ Error PCKPacker::flush(bool p_verbose) {
 
 PCKPacker::PCKPacker() {
 
-	file = NULL;
+	file = nullptr;
 };
 
 PCKPacker::~PCKPacker() {
-	if (file != NULL) {
+	if (file != nullptr) {
 		memdelete(file);
 	};
-	file = NULL;
+	file = nullptr;
 };

core/io/resource_format_binary.cpp

@@ -1009,7 +1009,7 @@ String ResourceLoaderBinary::recognize(FileAccess *p_f) {
 ResourceLoaderBinary::ResourceLoaderBinary() :
 		translation_remapped(false),
 		ver_format(0),
-		f(NULL),
+		f(nullptr),
 		importmd_ofs(0),
 		error(OK) {
 
@@ -1107,7 +1107,7 @@ Error ResourceFormatLoaderBinary::rename_dependencies(const String &p_path, cons
 	FileAccess *f = FileAccess::open(p_path, FileAccess::READ);
 	ERR_FAIL_COND_V_MSG(!f, ERR_CANT_OPEN, "Cannot open file '" + p_path + "'.");
 
-	FileAccess *fw = NULL; //=FileAccess::open(p_path+".depren");
+	FileAccess *fw = nullptr; //=FileAccess::open(p_path+".depren");
 
 	String local_path = p_path.get_base_dir();
 
@@ -2095,7 +2095,7 @@ void ResourceFormatSaverBinary::get_recognized_extensions(const RES &p_resource,
 		p_extensions->push_back("res");
 }
 
-ResourceFormatSaverBinary *ResourceFormatSaverBinary::singleton = NULL;
+ResourceFormatSaverBinary *ResourceFormatSaverBinary::singleton = nullptr;
 
 ResourceFormatSaverBinary::ResourceFormatSaverBinary() {
 

core/io/resource_format_binary.h

@@ -101,7 +101,7 @@ public:
 
 class ResourceFormatLoaderBinary : public ResourceFormatLoader {
 public:
-	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = NULL, bool p_use_sub_threads = false, float *r_progress = nullptr);
+	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = nullptr, bool p_use_sub_threads = false, float *r_progress = nullptr);
 	virtual void get_recognized_extensions_for_type(const String &p_type, List<String> *p_extensions) const;
 	virtual void get_recognized_extensions(List<String> *p_extensions) const;
 	virtual bool handles_type(const String &p_type) const;

core/io/resource_importer.cpp

@@ -69,7 +69,7 @@ Error ResourceFormatImporter::_get_path_and_type(const String &p_path, PathAndTy
 		next_tag.fields.clear();
 		next_tag.name = String();
 
-		err = VariantParser::parse_tag_assign_eof(&stream, lines, error_text, next_tag, assign, value, NULL, true);
+		err = VariantParser::parse_tag_assign_eof(&stream, lines, error_text, next_tag, assign, value, nullptr, true);
 		if (err == ERR_FILE_EOF) {
 			memdelete(f);
 			return OK;
@@ -274,7 +274,7 @@ void ResourceFormatImporter::get_internal_resource_path_list(const String &p_pat
 		next_tag.fields.clear();
 		next_tag.name = String();
 
-		err = VariantParser::parse_tag_assign_eof(&stream, lines, error_text, next_tag, assign, value, NULL, true);
+		err = VariantParser::parse_tag_assign_eof(&stream, lines, error_text, next_tag, assign, value, nullptr, true);
 		if (err == ERR_FILE_EOF) {
 			memdelete(f);
 			return;
@@ -434,7 +434,7 @@ String ResourceFormatImporter::get_import_settings_hash() const {
 	return hash.md5_text();
 }
 
-ResourceFormatImporter *ResourceFormatImporter::singleton = NULL;
+ResourceFormatImporter *ResourceFormatImporter::singleton = nullptr;
 
 ResourceFormatImporter::ResourceFormatImporter() {
 	singleton = this;

core/io/resource_importer.h

@@ -45,7 +45,7 @@ class ResourceFormatImporter : public ResourceFormatLoader {
 		Variant metadata;
 	};
 
-	Error _get_path_and_type(const String &p_path, PathAndType &r_path_and_type, bool *r_valid = NULL) const;
+	Error _get_path_and_type(const String &p_path, PathAndType &r_path_and_type, bool *r_valid = nullptr) const;
 
 	static ResourceFormatImporter *singleton;
 
@@ -58,7 +58,7 @@ class ResourceFormatImporter : public ResourceFormatLoader {
 
 public:
 	static ResourceFormatImporter *get_singleton() { return singleton; }
-	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = NULL, bool p_use_sub_threads = false, float *r_progress = nullptr);
+	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = nullptr, bool p_use_sub_threads = false, float *r_progress = nullptr);
 	virtual void get_recognized_extensions(List<String> *p_extensions) const;
 	virtual void get_recognized_extensions_for_type(const String &p_type, List<String> *p_extensions) const;
 	virtual bool recognize_path(const String &p_path, const String &p_for_type = String()) const;
@@ -123,7 +123,7 @@ public:
 	virtual bool get_option_visibility(const String &p_option, const Map<StringName, Variant> &p_options) const = 0;
 	virtual String get_option_group_file() const { return String(); }
 
-	virtual Error import(const String &p_source_file, const String &p_save_path, const Map<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = NULL, Variant *r_metadata = NULL) = 0;
+	virtual Error import(const String &p_source_file, const String &p_save_path, const Map<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = nullptr, Variant *r_metadata = nullptr) = 0;
 
 	virtual Error import_group_file(const String &p_group_file, const Map<String, Map<StringName, Variant>> &p_source_file_options, const Map<String, String> &p_base_paths) { return ERR_UNAVAILABLE; }
 	virtual bool are_import_settings_valid(const String &p_path) const { return true; }

core/io/resource_loader.cpp

@@ -936,7 +936,7 @@ String ResourceLoader::_path_remap(const String &p_path, bool *r_translation_rem
 				next_tag.fields.clear();
 				next_tag.name = String();
 
-				err = VariantParser::parse_tag_assign_eof(&stream, lines, error_text, next_tag, assign, value, NULL, true);
+				err = VariantParser::parse_tag_assign_eof(&stream, lines, error_text, next_tag, assign, value, nullptr, true);
 				if (err == ERR_FILE_EOF) {
 					break;
 				} else if (err != OK) {
@@ -1048,7 +1048,7 @@ void ResourceLoader::set_load_callback(ResourceLoadedCallback p_callback) {
 	_loaded_callback = p_callback;
 }
 
-ResourceLoadedCallback ResourceLoader::_loaded_callback = NULL;
+ResourceLoadedCallback ResourceLoader::_loaded_callback = nullptr;
 
 Ref<ResourceFormatLoader> ResourceLoader::_find_custom_resource_format_loader(String path) {
 	for (int i = 0; i < loader_count; ++i) {
@@ -1075,7 +1075,7 @@ bool ResourceLoader::add_custom_resource_format_loader(String script_path) {
 
 	Object *obj = ClassDB::instance(ibt);
 
-	ERR_FAIL_COND_V_MSG(obj == NULL, false, "Cannot instance script as custom resource loader, expected 'ResourceFormatLoader' inheritance, got: " + String(ibt) + ".");
+	ERR_FAIL_COND_V_MSG(obj == nullptr, false, "Cannot instance script as custom resource loader, expected 'ResourceFormatLoader' inheritance, got: " + String(ibt) + ".");
 
 	ResourceFormatLoader *crl = Object::cast_to<ResourceFormatLoader>(obj);
 	crl->set_script(s);
@@ -1140,11 +1140,11 @@ void ResourceLoader::finalize() {
 	memdelete(thread_load_semaphore);
 }
 
-ResourceLoadErrorNotify ResourceLoader::err_notify = NULL;
+ResourceLoadErrorNotify ResourceLoader::err_notify = nullptr;
-void *ResourceLoader::err_notify_ud = NULL;
+void *ResourceLoader::err_notify_ud = nullptr;
 
-DependencyErrorNotify ResourceLoader::dep_err_notify = NULL;
+DependencyErrorNotify ResourceLoader::dep_err_notify = nullptr;
-void *ResourceLoader::dep_err_notify_ud = NULL;
+void *ResourceLoader::dep_err_notify_ud = nullptr;
 
 bool ResourceLoader::abort_on_missing_resource = true;
 bool ResourceLoader::timestamp_on_load = false;
@@ -1162,4 +1162,4 @@ SelfList<Resource>::List ResourceLoader::remapped_list;
 HashMap<String, Vector<String>> ResourceLoader::translation_remaps;
 HashMap<String, String> ResourceLoader::path_remaps;
 
-ResourceLoaderImport ResourceLoader::import = NULL;
+ResourceLoaderImport ResourceLoader::import = nullptr;

core/io/resource_loader.h

@@ -43,7 +43,7 @@ protected:
 	static void _bind_methods();
 
 public:
-	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = NULL, bool p_use_sub_threads = false, float *r_progress = nullptr);
+	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = nullptr, bool p_use_sub_threads = false, float *r_progress = nullptr);
 	virtual bool exists(const String &p_path) const;
 	virtual void get_recognized_extensions(List<String> *p_extensions) const;
 	virtual void get_recognized_extensions_for_type(const String &p_type, List<String> *p_extensions) const;
@@ -93,7 +93,7 @@ private:
 	static HashMap<String, Vector<String>> translation_remaps;
 	static HashMap<String, String> path_remaps;
 
-	static String _path_remap(const String &p_path, bool *r_translation_remapped = NULL);
+	static String _path_remap(const String &p_path, bool *r_translation_remapped = nullptr);
 	friend class Resource;
 
 	static SelfList<Resource>::List remapped_list;
@@ -140,9 +140,9 @@ private:
 public:
 	static Error load_threaded_request(const String &p_path, const String &p_type_hint = "", bool p_use_sub_threads = false, const String &p_source_resource = String());
 	static ThreadLoadStatus load_threaded_get_status(const String &p_path, float *r_progress = nullptr);
-	static RES load_threaded_get(const String &p_path, Error *r_error = NULL);
+	static RES load_threaded_get(const String &p_path, Error *r_error = nullptr);
 
-	static RES load(const String &p_path, const String &p_type_hint = "", bool p_no_cache = false, Error *r_error = NULL);
+	static RES load(const String &p_path, const String &p_type_hint = "", bool p_no_cache = false, Error *r_error = nullptr);
 	static bool exists(const String &p_path, const String &p_type_hint = "");
 
 	static void get_recognized_extensions_for_type(const String &p_type, List<String> *p_extensions);

core/io/resource_saver.cpp

@@ -38,7 +38,7 @@ Ref<ResourceFormatSaver> ResourceSaver::saver[MAX_SAVERS];
 
 int ResourceSaver::saver_count = 0;
 bool ResourceSaver::timestamp_on_save = false;
-ResourceSavedCallback ResourceSaver::save_callback = 0;
+ResourceSavedCallback ResourceSaver::save_callback = nullptr;
 
 Error ResourceFormatSaver::save(const String &p_path, const RES &p_resource, uint32_t p_flags) {
 
@@ -218,7 +218,7 @@ bool ResourceSaver::add_custom_resource_format_saver(String script_path) {
 
 	Object *obj = ClassDB::instance(ibt);
 
-	ERR_FAIL_COND_V_MSG(obj == NULL, false, "Cannot instance script as custom resource saver, expected 'ResourceFormatSaver' inheritance, got: " + String(ibt) + ".");
+	ERR_FAIL_COND_V_MSG(obj == nullptr, false, "Cannot instance script as custom resource saver, expected 'ResourceFormatSaver' inheritance, got: " + String(ibt) + ".");
 
 	ResourceFormatSaver *crl = Object::cast_to<ResourceFormatSaver>(obj);
 	crl->set_script(s);

core/io/stream_peer.cpp

@@ -224,7 +224,7 @@ void StreamPeer::put_var(const Variant &p_variant, bool p_full_objects) {
 
 	int len = 0;
 	Vector<uint8_t> buf;
-	encode_variant(p_variant, NULL, len, p_full_objects);
+	encode_variant(p_variant, nullptr, len, p_full_objects);
 	buf.resize(len);
 	put_32(len);
 	encode_variant(p_variant, buf.ptrw(), len, p_full_objects);
@@ -368,7 +368,7 @@ Variant StreamPeer::get_var(bool p_allow_objects) {
 	ERR_FAIL_COND_V(err != OK, Variant());
 
 	Variant ret;
-	err = decode_variant(ret, var.ptr(), len, NULL, p_allow_objects);
+	err = decode_variant(ret, var.ptr(), len, nullptr, p_allow_objects);
 	ERR_FAIL_COND_V_MSG(err != OK, Variant(), "Error when trying to decode Variant.");
 
 	return ret;

core/io/stream_peer_ssl.cpp

@@ -32,13 +32,13 @@
 
 #include "core/engine.h"
 
-StreamPeerSSL *(*StreamPeerSSL::_create)() = NULL;
+StreamPeerSSL *(*StreamPeerSSL::_create)() = nullptr;
 
 StreamPeerSSL *StreamPeerSSL::create() {
 
 	if (_create)
 		return _create();
-	return NULL;
+	return nullptr;
 }
 
 bool StreamPeerSSL::available = false;

core/io/translation_loader_po.h

@@ -37,8 +37,8 @@
 
 class TranslationLoaderPO : public ResourceFormatLoader {
 public:
-	static RES load_translation(FileAccess *f, Error *r_error = NULL);
+	static RES load_translation(FileAccess *f, Error *r_error = nullptr);
-	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = NULL, bool p_use_sub_threads = false, float *r_progress = nullptr);
+	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = nullptr, bool p_use_sub_threads = false, float *r_progress = nullptr);
 	virtual void get_recognized_extensions(List<String> *p_extensions) const;
 	virtual bool handles_type(const String &p_type) const;
 	virtual String get_resource_type(const String &p_path) const;

core/io/xml_parser.cpp

@@ -165,7 +165,7 @@ bool XMLParser::_parse_cdata() {
 		return true;
 
 	char *cDataBegin = P;
-	char *cDataEnd = 0;
+	char *cDataEnd = nullptr;
 
 	// find end of CDATA
 	while (*P && !cDataEnd) {
@@ -529,9 +529,9 @@ void XMLParser::close() {
 
 	if (data)
 		memdelete_arr(data);
-	data = NULL;
+	data = nullptr;
 	length = 0;
-	P = NULL;
+	P = nullptr;
 	node_empty = false;
 	node_type = NODE_NONE;
 	node_offset = 0;
@@ -544,7 +544,7 @@ int XMLParser::get_current_line() const {
 
 XMLParser::XMLParser() {
 
-	data = NULL;
+	data = nullptr;
 	close();
 	special_characters.push_back("&");
 	special_characters.push_back("<lt;");

core/io/zip_io.cpp

@@ -47,7 +47,7 @@ void *zipio_open(void *data, const char *p_fname, int mode) {
 	}
 
 	if (!f)
-		return NULL;
+		return nullptr;
 
 	return data;
 }
@@ -98,7 +98,7 @@ int zipio_close(voidpf opaque, voidpf stream) {
 	if (f) {
 		f->close();
 		memdelete(f);
-		f = NULL;
+		f = nullptr;
 	}
 	return 0;
 }

core/list.h

@@ -142,7 +142,7 @@ public:
 		_FORCE_INLINE_ Element() {
 			next_ptr = 0;
 			prev_ptr = 0;
-			data = NULL;
+			data = nullptr;
 		};
 	};
 
@@ -220,8 +220,8 @@ public:
 		if (!_data) {
 
 			_data = memnew_allocator(_Data, A);
-			_data->first = NULL;
+			_data->first = nullptr;
-			_data->last = NULL;
+			_data->last = nullptr;
 			_data->size_cache = 0;
 		}
 
@@ -261,8 +261,8 @@ public:
 		if (!_data) {
 
 			_data = memnew_allocator(_Data, A);
-			_data->first = NULL;
+			_data->first = nullptr;
-			_data->last = NULL;
+			_data->last = nullptr;
 			_data->size_cache = 0;
 		}
 
@@ -357,7 +357,7 @@ public:
 			it = it->next();
 		};
 
-		return NULL;
+		return nullptr;
 	};
 
 	/**
@@ -370,7 +370,7 @@ public:
 
 			if (_data->size_cache == 0) {
 				memdelete_allocator<_Data, A>(_data);
-				_data = NULL;
+				_data = nullptr;
 			}
 
 			return ret;
@@ -498,7 +498,7 @@ public:
 
 		_data->last->next_ptr = p_I;
 		p_I->prev_ptr = _data->last;
-		p_I->next_ptr = NULL;
+		p_I->next_ptr = nullptr;
 		_data->last = p_I;
 	}
 
@@ -535,7 +535,7 @@ public:
 
 		_data->first->prev_ptr = p_I;
 		p_I->next_ptr = _data->first;
-		p_I->prev_ptr = NULL;
+		p_I->prev_ptr = nullptr;
 		_data->first = p_I;
 	}
 
@@ -595,7 +595,7 @@ public:
 
 			if (from != current) {
 
-				current->prev_ptr = NULL;
+				current->prev_ptr = nullptr;
 				current->next_ptr = from;
 
 				Element *find = from;
@@ -618,8 +618,8 @@ public:
 					to = current;
 			} else {
 
-				current->prev_ptr = NULL;
+				current->prev_ptr = nullptr;
-				current->next_ptr = NULL;
+				current->next_ptr = nullptr;
 			}
 
 			current = next;
@@ -661,12 +661,12 @@ public:
 		sort.sort(aux_buffer, s);
 
 		_data->first = aux_buffer[0];
-		aux_buffer[0]->prev_ptr = NULL;
+		aux_buffer[0]->prev_ptr = nullptr;
 		aux_buffer[0]->next_ptr = aux_buffer[1];
 
 		_data->last = aux_buffer[s - 1];
 		aux_buffer[s - 1]->prev_ptr = aux_buffer[s - 2];
-		aux_buffer[s - 1]->next_ptr = NULL;
+		aux_buffer[s - 1]->next_ptr = nullptr;
 
 		for (int i = 1; i < s - 1; i++) {
 
@@ -686,7 +686,7 @@ public:
 	 */
 	List(const List &p_list) {
 
-		_data = NULL;
+		_data = nullptr;
 		const Element *it = p_list.front();
 		while (it) {
 
@@ -696,7 +696,7 @@ public:
 	}
 
 	List() {
-		_data = NULL;
+		_data = nullptr;
 	};
 	~List() {
 		clear();

core/map.h

@@ -95,11 +95,11 @@ public:
 		};
 		Element() {
 			color = RED;
-			right = NULL;
+			right = nullptr;
-			left = NULL;
+			left = nullptr;
-			parent = NULL;
+			parent = nullptr;
-			_next = NULL;
+			_next = nullptr;
-			_prev = NULL;
+			_prev = nullptr;
 		};
 	};
 
@@ -118,7 +118,7 @@ private:
 #else
 			_nil = (Element *)&_GlobalNilClass::_nil;
 #endif
-			_root = NULL;
+			_root = nullptr;
 			size_cache = 0;
 		}
 
@@ -133,7 +133,7 @@ private:
 
 			if (_root) {
 				memdelete_allocator<Element, A>(_root);
-				_root = NULL;
+				_root = nullptr;
 			}
 		}
 
@@ -205,7 +205,7 @@ private:
 			}
 
 			if (node->parent == _data._root)
-				return NULL; // No successor, as p_node = last node
+				return nullptr; // No successor, as p_node = last node
 			return node->parent;
 		}
 	}
@@ -227,7 +227,7 @@ private:
 			}
 
 			if (node == _data._root)
-				return NULL; // No predecessor, as p_node = first node
+				return nullptr; // No predecessor, as p_node = first node
 			return node->parent;
 		}
 	}
@@ -246,13 +246,13 @@ private:
 				return node; // found
 		}
 
-		return NULL;
+		return nullptr;
 	}
 
 	Element *_find_closest(const K &p_key) const {
 
 		Element *node = _data._root->left;
-		Element *prev = NULL;
+		Element *prev = nullptr;
 		C less;
 
 		while (node != _data._nil) {
@@ -266,8 +266,8 @@ private:
 				return node; // found
 		}
 
-		if (prev == NULL)
+		if (prev == nullptr)
-			return NULL; // tree empty
+			return nullptr; // tree empty
 
 		if (less(p_key, prev->_key))
 			prev = prev->_prev;
@@ -519,7 +519,7 @@ public:
 	const Element *find(const K &p_key) const {
 
 		if (!_data._root)
-			return NULL;
+			return nullptr;
 
 		const Element *res = _find(p_key);
 		return res;
@@ -528,7 +528,7 @@ public:
 	Element *find(const K &p_key) {
 
 		if (!_data._root)
-			return NULL;
+			return nullptr;
 
 		Element *res = _find(p_key);
 		return res;
@@ -537,7 +537,7 @@ public:
 	const Element *find_closest(const K &p_key) const {
 
 		if (!_data._root)
-			return NULL;
+			return nullptr;
 
 		const Element *res = _find_closest(p_key);
 		return res;
@@ -546,7 +546,7 @@ public:
 	Element *find_closest(const K &p_key) {
 
 		if (!_data._root)
-			return NULL;
+			return nullptr;
 
 		Element *res = _find_closest(p_key);
 		return res;
@@ -554,7 +554,7 @@ public:
 
 	bool has(const K &p_key) const {
 
-		return find(p_key) != NULL;
+		return find(p_key) != nullptr;
 	}
 
 	Element *insert(const K &p_key, const V &p_value) {
@@ -612,11 +612,11 @@ public:
 	Element *front() const {
 
 		if (!_data._root)
-			return NULL;
+			return nullptr;
 
 		Element *e = _data._root->left;
 		if (e == _data._nil)
-			return NULL;
+			return nullptr;
 
 		while (e->left != _data._nil)
 			e = e->left;
@@ -627,11 +627,11 @@ public:
 	Element *back() const {
 
 		if (!_data._root)
-			return NULL;
+			return nullptr;
 
 		Element *e = _data._root->left;
 		if (e == _data._nil)
-			return NULL;
+			return nullptr;
 
 		while (e->right != _data._nil)
 			e = e->right;

core/math/a_star.cpp

@@ -66,7 +66,7 @@ void AStar::add_point(int p_id, const Vector3 &p_pos, real_t p_weight_scale) {
 		pt->id = p_id;
 		pt->pos = p_pos;
 		pt->weight_scale = p_weight_scale;
-		pt->prev_point = NULL;
+		pt->prev_point = nullptr;
 		pt->open_pass = 0;
 		pt->closed_pass = 0;
 		pt->enabled = true;
@@ -167,7 +167,7 @@ void AStar::connect_points(int p_id, int p_with_id, bool bidirectional) {
 	if (bidirectional) s.direction = Segment::BIDIRECTIONAL;
 
 	Set<Segment>::Element *element = segments.find(s);
-	if (element != NULL) {
+	if (element != nullptr) {
 		s.direction |= element->get().direction;
 		if (s.direction == Segment::BIDIRECTIONAL) {
 			// Both are neighbours of each other now
@@ -194,7 +194,7 @@ void AStar::disconnect_points(int p_id, int p_with_id, bool bidirectional) {
 	int remove_direction = bidirectional ? (int)Segment::BIDIRECTIONAL : s.direction;
 
 	Set<Segment>::Element *element = segments.find(s);
-	if (element != NULL) {
+	if (element != nullptr) {
 		// s is the new segment
 		// Erase the directions to be removed
 		s.direction = (element->get().direction & ~remove_direction);
@@ -255,7 +255,7 @@ bool AStar::are_points_connected(int p_id, int p_with_id, bool bidirectional) co
 	Segment s(p_id, p_with_id);
 	const Set<Segment>::Element *element = segments.find(s);
 
-	return element != NULL &&
+	return element != nullptr &&
 		   (bidirectional || (element->get().direction & s.direction) == s.direction);
 }
 

core/math/aabb.h

@@ -72,8 +72,8 @@ public:
 	AABB merge(const AABB &p_with) const;
 	void merge_with(const AABB &p_aabb); ///merge with another AABB
 	AABB intersection(const AABB &p_aabb) const; ///get box where two intersect, empty if no intersection occurs
-	bool intersects_segment(const Vector3 &p_from, const Vector3 &p_to, Vector3 *r_clip = NULL, Vector3 *r_normal = NULL) const;
+	bool intersects_segment(const Vector3 &p_from, const Vector3 &p_to, Vector3 *r_clip = nullptr, Vector3 *r_normal = nullptr) const;
-	bool intersects_ray(const Vector3 &p_from, const Vector3 &p_dir, Vector3 *r_clip = NULL, Vector3 *r_normal = NULL) const;
+	bool intersects_ray(const Vector3 &p_from, const Vector3 &p_dir, Vector3 *r_clip = nullptr, Vector3 *r_normal = nullptr) const;
 	_FORCE_INLINE_ bool smits_intersect_ray(const Vector3 &p_from, const Vector3 &p_dir, real_t t0, real_t t1) const;
 
 	_FORCE_INLINE_ bool intersects_convex_shape(const Plane *p_planes, int p_plane_count) const;

core/math/expression.cpp

@@ -760,7 +760,7 @@ void Expression::exec_func(BuiltinFunc p_func, const Variant **p_inputs, Variant
 			PackedByteArray barr;
 			bool full_objects = *p_inputs[1];
 			int len;
-			Error err = encode_variant(*p_inputs[0], NULL, len, full_objects);
+			Error err = encode_variant(*p_inputs[0], nullptr, len, full_objects);
 			if (err) {
 				r_error.error = Callable::CallError::CALL_ERROR_INVALID_ARGUMENT;
 				r_error.argument = 0;
@@ -791,7 +791,7 @@ void Expression::exec_func(BuiltinFunc p_func, const Variant **p_inputs, Variant
 			Variant ret;
 			{
 				const uint8_t *r = varr.ptr();
-				Error err = decode_variant(ret, r, varr.size(), NULL, allow_objects);
+				Error err = decode_variant(ret, r, varr.size(), nullptr, allow_objects);
 				if (err != OK) {
 					r_error_str = RTR("Not enough bytes for decoding bytes, or invalid format.");
 					r_error.error = Callable::CallError::CALL_ERROR_INVALID_ARGUMENT;
@@ -1298,12 +1298,12 @@ Expression::ENode *Expression::_parse_expression() {
 
 	while (true) {
 		//keep appending stuff to expression
-		ENode *expr = NULL;
+		ENode *expr = nullptr;
 
 		Token tk;
 		_get_token(tk);
 		if (error_set)
-			return NULL;
+			return nullptr;
 
 		switch (tk.type) {
 			case TK_CURLY_BRACKET_OPEN: {
@@ -1321,18 +1321,18 @@ Expression::ENode *Expression::_parse_expression() {
 					//parse an expression
 					ENode *subexpr = _parse_expression();
 					if (!subexpr)
-						return NULL;
+						return nullptr;
 					dn->dict.push_back(subexpr);
 
 					_get_token(tk);
 					if (tk.type != TK_COLON) {
 						_set_error("Expected ':'");
-						return NULL;
+						return nullptr;
 					}
 
 					subexpr = _parse_expression();
 					if (!subexpr)
-						return NULL;
+						return nullptr;
 
 					dn->dict.push_back(subexpr);
 
@@ -1365,7 +1365,7 @@ Expression::ENode *Expression::_parse_expression() {
 					//parse an expression
 					ENode *subexpr = _parse_expression();
 					if (!subexpr)
-						return NULL;
+						return nullptr;
 					an->array.push_back(subexpr);
 
 					cofs = str_ofs;
@@ -1385,11 +1385,11 @@ Expression::ENode *Expression::_parse_expression() {
 				//a suexpression
 				ENode *e = _parse_expression();
 				if (error_set)
-					return NULL;
+					return nullptr;
 				_get_token(tk);
 				if (tk.type != TK_PARENTHESIS_CLOSE) {
 					_set_error("Expected ')'");
-					return NULL;
+					return nullptr;
 				}
 
 				expr = e;
@@ -1419,7 +1419,7 @@ Expression::ENode *Expression::_parse_expression() {
 						//parse an expression
 						ENode *subexpr = _parse_expression();
 						if (!subexpr)
-							return NULL;
+							return nullptr;
 
 						func_call->arguments.push_back(subexpr);
 
@@ -1484,7 +1484,7 @@ Expression::ENode *Expression::_parse_expression() {
 				_get_token(tk);
 				if (tk.type != TK_PARENTHESIS_OPEN) {
 					_set_error("Expected '('");
-					return NULL;
+					return nullptr;
 				}
 
 				ConstructorNode *constructor = alloc_node<ConstructorNode>();
@@ -1501,7 +1501,7 @@ Expression::ENode *Expression::_parse_expression() {
 					//parse an expression
 					ENode *subexpr = _parse_expression();
 					if (!subexpr)
-						return NULL;
+						return nullptr;
 
 					constructor->arguments.push_back(subexpr);
 
@@ -1525,7 +1525,7 @@ Expression::ENode *Expression::_parse_expression() {
 				_get_token(tk);
 				if (tk.type != TK_PARENTHESIS_OPEN) {
 					_set_error("Expected '('");
-					return NULL;
+					return nullptr;
 				}
 
 				BuiltinFuncNode *bifunc = alloc_node<BuiltinFuncNode>();
@@ -1542,7 +1542,7 @@ Expression::ENode *Expression::_parse_expression() {
 					//parse an expression
 					ENode *subexpr = _parse_expression();
 					if (!subexpr)
-						return NULL;
+						return nullptr;
 
 					bifunc->arguments.push_back(subexpr);
 
@@ -1584,7 +1584,7 @@ Expression::ENode *Expression::_parse_expression() {
 
 			default: {
 				_set_error("Expected expression.");
-				return NULL;
+				return nullptr;
 			} break;
 		}
 
@@ -1594,7 +1594,7 @@ Expression::ENode *Expression::_parse_expression() {
 			int cofs2 = str_ofs;
 			_get_token(tk);
 			if (error_set)
-				return NULL;
+				return nullptr;
 
 			bool done = false;
 
@@ -1607,14 +1607,14 @@ Expression::ENode *Expression::_parse_expression() {
 
 					ENode *what = _parse_expression();
 					if (!what)
-						return NULL;
+						return nullptr;
 
 					index->index = what;
 
 					_get_token(tk);
 					if (tk.type != TK_BRACKET_CLOSE) {
 						_set_error("Expected ']' at end of index.");
-						return NULL;
+						return nullptr;
 					}
 					expr = index;
 
@@ -1624,7 +1624,7 @@ Expression::ENode *Expression::_parse_expression() {
 					_get_token(tk);
 					if (tk.type != TK_IDENTIFIER) {
 						_set_error("Expected identifier after '.'");
-						return NULL;
+						return nullptr;
 					}
 
 					StringName identifier = tk.value;
@@ -1648,7 +1648,7 @@ Expression::ENode *Expression::_parse_expression() {
 							//parse an expression
 							ENode *subexpr = _parse_expression();
 							if (!subexpr)
-								return NULL;
+								return nullptr;
 
 							func_call->arguments.push_back(subexpr);
 
@@ -1698,7 +1698,7 @@ Expression::ENode *Expression::_parse_expression() {
 		int cofs = str_ofs;
 		_get_token(tk);
 		if (error_set)
-			return NULL;
+			return nullptr;
 
 		Variant::Operator op = Variant::OP_MAX;
 
@@ -1805,7 +1805,7 @@ Expression::ENode *Expression::_parse_expression() {
 
 				default: {
 					_set_error("Parser bug, invalid operator in expression: " + itos(expression[i].op));
-					return NULL;
+					return nullptr;
 				}
 			}
 
@@ -1822,7 +1822,7 @@ Expression::ENode *Expression::_parse_expression() {
 		if (next_op == -1) {
 
 			_set_error("Yet another parser bug....");
-			ERR_FAIL_V(NULL);
+			ERR_FAIL_V(nullptr);
 		}
 
 		// OK! create operator..
@@ -1835,7 +1835,7 @@ Expression::ENode *Expression::_parse_expression() {
 				if (expr_pos == expression.size()) {
 					//can happen..
 					_set_error("Unexpected end of expression...");
-					return NULL;
+					return nullptr;
 				}
 			}
 
@@ -1845,7 +1845,7 @@ Expression::ENode *Expression::_parse_expression() {
 				OperatorNode *op = alloc_node<OperatorNode>();
 				op->op = expression[i].op;
 				op->nodes[0] = expression[i + 1].node;
-				op->nodes[1] = NULL;
+				op->nodes[1] = nullptr;
 				expression.write[i].is_op = false;
 				expression.write[i].node = op;
 				expression.remove(i + 1);
@@ -1855,7 +1855,7 @@ Expression::ENode *Expression::_parse_expression() {
 
 			if (next_op < 1 || next_op >= (expression.size() - 1)) {
 				_set_error("Parser bug...");
-				ERR_FAIL_V(NULL);
+				ERR_FAIL_V(nullptr);
 			}
 
 			OperatorNode *op = alloc_node<OperatorNode>();
@@ -1864,7 +1864,7 @@ Expression::ENode *Expression::_parse_expression() {
 			if (expression[next_op - 1].is_op) {
 
 				_set_error("Parser bug...");
-				ERR_FAIL_V(NULL);
+				ERR_FAIL_V(nullptr);
 			}
 
 			if (expression[next_op + 1].is_op) {
@@ -1874,7 +1874,7 @@ Expression::ENode *Expression::_parse_expression() {
 				// due to how precedence works, unaries will always disappear first
 
 				_set_error("Unexpected two consecutive operators.");
-				return NULL;
+				return nullptr;
 			}
 
 			op->nodes[0] = expression[next_op - 1].node; //expression goes as left
@@ -1897,8 +1897,8 @@ bool Expression::_compile_expression() {
 
 	if (nodes) {
 		memdelete(nodes);
-		nodes = NULL;
+		nodes = nullptr;
-		root = NULL;
+		root = nullptr;
 	}
 
 	error_str = String();
@@ -1908,11 +1908,11 @@ bool Expression::_compile_expression() {
 	root = _parse_expression();
 
 	if (error_set) {
-		root = NULL;
+		root = nullptr;
 		if (nodes) {
 			memdelete(nodes);
 		}
-		nodes = NULL;
+		nodes = nullptr;
 		return true;
 	}
 
@@ -2151,8 +2151,8 @@ Error Expression::parse(const String &p_expression, const Vector<String> &p_inpu
 
 	if (nodes) {
 		memdelete(nodes);
-		nodes = NULL;
+		nodes = nullptr;
-		root = NULL;
+		root = nullptr;
 	}
 
 	error_str = String();
@@ -2164,11 +2164,11 @@ Error Expression::parse(const String &p_expression, const Vector<String> &p_inpu
 	root = _parse_expression();
 
 	if (error_set) {
-		root = NULL;
+		root = nullptr;
 		if (nodes) {
 			memdelete(nodes);
 		}
-		nodes = NULL;
+		nodes = nullptr;
 		return ERR_INVALID_PARAMETER;
 	}
 
@@ -2212,8 +2212,8 @@ Expression::Expression() :
 		output_type(Variant::NIL),
 		sequenced(false),
 		error_set(true),
-		root(NULL),
+		root(nullptr),
-		nodes(NULL),
+		nodes(nullptr),
 		execution_error(false) {
 	str_ofs = 0;
 	expression_dirty = false;

core/math/expression.h

@@ -219,7 +219,7 @@ private:
 
 		Type type;
 
-		ENode() { next = NULL; }
+		ENode() { next = nullptr; }
 		virtual ~ENode() {
 			if (next) {
 				memdelete(next);
@@ -352,7 +352,7 @@ protected:
 
 public:
 	Error parse(const String &p_expression, const Vector<String> &p_input_names = Vector<String>());
-	Variant execute(Array p_inputs, Object *p_base = NULL, bool p_show_error = true);
+	Variant execute(Array p_inputs, Object *p_base = nullptr, bool p_show_error = true);
 	bool has_execute_failed() const;
 	String get_error_text() const;
 

core/math/geometry.h

@@ -891,7 +891,7 @@ public:
 		for (int i = 0; i < c; i++) {
 			const Vector2 &v1 = p[i];
 			const Vector2 &v2 = p[(i + 1) % c];
-			if (segment_intersects_segment_2d(v1, v2, p_point, further_away, NULL)) {
+			if (segment_intersects_segment_2d(v1, v2, p_point, further_away, nullptr)) {
 				intersections++;
 			}
 		}
@@ -902,7 +902,7 @@ public:
 	static Vector<Vector<Face3>> separate_objects(Vector<Face3> p_array);
 
 	// Create a "wrap" that encloses the given geometry.
-	static Vector<Face3> wrap_geometry(Vector<Face3> p_array, real_t *p_error = NULL);
+	static Vector<Face3> wrap_geometry(Vector<Face3> p_array, real_t *p_error = nullptr);
 
 	struct MeshData {
 

core/math/octree.h

@@ -119,9 +119,9 @@ private:
 			children_count = 0;
 			parent_index = -1;
 			last_pass = 0;
-			parent = NULL;
+			parent = nullptr;
 			for (int i = 0; i < 8; i++)
-				children[i] = NULL;
+				children[i] = nullptr;
 		}
 
 		~Octant() {
@@ -171,7 +171,7 @@ private:
 			octree = 0;
 			pairable_mask = 0;
 			pairable_type = 0;
-			common_parent = NULL;
+			common_parent = nullptr;
 		}
 	};
 
@@ -308,19 +308,19 @@ private:
 
 		while (root && root->children_count < 2 && !root->elements.size() && !(use_pairs && root->pairable_elements.size())) {
 
-			Octant *new_root = NULL;
+			Octant *new_root = nullptr;
 			if (root->children_count == 1) {
 
 				for (int i = 0; i < 8; i++) {
 
 					if (root->children[i]) {
 						new_root = root->children[i];
-						root->children[i] = NULL;
+						root->children[i] = nullptr;
 						break;
 					}
 				}
 				ERR_FAIL_COND(!new_root);
-				new_root->parent = NULL;
+				new_root->parent = nullptr;
 				new_root->parent_index = -1;
 			}
 
@@ -332,7 +332,7 @@ private:
 
 	void _insert_element(Element *p_element, Octant *p_octant);
 	void _ensure_valid_root(const AABB &p_aabb);
-	bool _remove_element_from_octant(Element *p_element, Octant *p_octant, Octant *p_limit = NULL);
+	bool _remove_element_from_octant(Element *p_element, Octant *p_octant, Octant *p_limit = nullptr);
 	void _remove_element(Element *p_element);
 	void _pair_element(Element *p_element, Octant *p_octant);
 	void _unpair_element(Element *p_element, Octant *p_octant);
@@ -377,10 +377,10 @@ public:
 	int get_subindex(OctreeElementID p_id) const;
 
 	int cull_convex(const Vector<Plane> &p_convex, T **p_result_array, int p_result_max, uint32_t p_mask = 0xFFFFFFFF);
-	int cull_aabb(const AABB &p_aabb, T **p_result_array, int p_result_max, int *p_subindex_array = NULL, uint32_t p_mask = 0xFFFFFFFF);
+	int cull_aabb(const AABB &p_aabb, T **p_result_array, int p_result_max, int *p_subindex_array = nullptr, uint32_t p_mask = 0xFFFFFFFF);
-	int cull_segment(const Vector3 &p_from, const Vector3 &p_to, T **p_result_array, int p_result_max, int *p_subindex_array = NULL, uint32_t p_mask = 0xFFFFFFFF);
+	int cull_segment(const Vector3 &p_from, const Vector3 &p_to, T **p_result_array, int p_result_max, int *p_subindex_array = nullptr, uint32_t p_mask = 0xFFFFFFFF);
 
-	int cull_point(const Vector3 &p_point, T **p_result_array, int p_result_max, int *p_subindex_array = NULL, uint32_t p_mask = 0xFFFFFFFF);
+	int cull_point(const Vector3 &p_point, T **p_result_array, int p_result_max, int *p_subindex_array = nullptr, uint32_t p_mask = 0xFFFFFFFF);
 
 	void set_pair_callback(PairCallback p_callback, void *p_userdata);
 	void set_unpair_callback(UnpairCallback p_callback, void *p_userdata);
@@ -396,7 +396,7 @@ public:
 template <class T, bool use_pairs, class AL>
 T *Octree<T, use_pairs, AL>::get(OctreeElementID p_id) const {
 	const typename ElementMap::Element *E = element_map.find(p_id);
-	ERR_FAIL_COND_V(!E, NULL);
+	ERR_FAIL_COND_V(!E, nullptr);
 	return E->get().userdata;
 }
 
@@ -442,7 +442,7 @@ void Octree<T, use_pairs, AL>::_insert_element(Element *p_element, Octant *p_oct
 
 		p_element->octant_owners.push_back(owner);
 
-		if (p_element->common_parent == NULL) {
+		if (p_element->common_parent == nullptr) {
 			p_element->common_parent = p_octant;
 			p_element->container_aabb = p_octant->aabb;
 		} else {
@@ -463,7 +463,7 @@ void Octree<T, use_pairs, AL>::_insert_element(Element *p_element, Octant *p_oct
 	} else {
 		/* not big enough, send it to subitems */
 		int splits = 0;
-		bool candidate = p_element->common_parent == NULL;
+		bool candidate = p_element->common_parent == nullptr;
 
 		for (int i = 0; i < 8; i++) {
 
@@ -552,7 +552,7 @@ void Octree<T, use_pairs, AL>::_ensure_valid_root(const AABB &p_aabb) {
 
 		root = memnew_allocator(Octant, AL);
 
-		root->parent = NULL;
+		root->parent = nullptr;
 		root->parent_index = -1;
 		root->aabb = base;
 
@@ -634,11 +634,11 @@ bool Octree<T, use_pairs, AL>::_remove_element_from_octant(Element *p_element, O
 
 			if (p_octant == root) { // won't have a parent, just erase
 
-				root = NULL;
+				root = nullptr;
 			} else {
 				ERR_FAIL_INDEX_V(p_octant->parent_index, 8, octant_removed);
 
-				parent->children[p_octant->parent_index] = NULL;
+				parent->children[p_octant->parent_index] = nullptr;
 				parent->children_count--;
 			}
 
@@ -852,12 +852,12 @@ void Octree<T, use_pairs, AL>::move(OctreeElementID p_id, const AABB &p_aabb) {
 
 		if (old_has_surf) {
 			_remove_element(&e); // removing
-			e.common_parent = NULL;
+			e.common_parent = nullptr;
 			e.aabb = AABB();
 			_optimize();
 		} else {
 			_ensure_valid_root(p_aabb); // inserting
-			e.common_parent = NULL;
+			e.common_parent = nullptr;
 			e.aabb = p_aabb;
 			_insert_element(&e, root);
 			if (use_pairs)
@@ -884,7 +884,7 @@ void Octree<T, use_pairs, AL>::move(OctreeElementID p_id, const AABB &p_aabb) {
 	combined.merge_with(p_aabb);
 	_ensure_valid_root(combined);
 
-	ERR_FAIL_COND(e.octant_owners.front() == NULL);
+	ERR_FAIL_COND(e.octant_owners.front() == nullptr);
 
 	/* FIND COMMON PARENT */
 
@@ -902,7 +902,7 @@ void Octree<T, use_pairs, AL>::move(OctreeElementID p_id, const AABB &p_aabb) {
 
 	//prepare for reinsert
 	e.octant_owners.clear();
-	e.common_parent = NULL;
+	e.common_parent = nullptr;
 	e.aabb = p_aabb;
 
 	_insert_element(&e, common_parent); // reinsert from this point
@@ -971,7 +971,7 @@ void Octree<T, use_pairs, AL>::set_pairable(OctreeElementID p_id, bool p_pairabl
 	e.pairable = p_pairable;
 	e.pairable_type = p_pairable_type;
 	e.pairable_mask = p_pairable_mask;
-	e.common_parent = NULL;
+	e.common_parent = nullptr;
 
 	if (!e.aabb.has_no_surface()) {
 		_ensure_valid_root(e.aabb);
@@ -1364,15 +1364,15 @@ Octree<T, use_pairs, AL>::Octree(real_t p_unit_size) {
 	last_element_id = 1;
 	pass = 1;
 	unit_size = p_unit_size;
-	root = NULL;
+	root = nullptr;
 
 	octant_count = 0;
 	pair_count = 0;
 
-	pair_callback = NULL;
+	pair_callback = nullptr;
-	unpair_callback = NULL;
+	unpair_callback = nullptr;
-	pair_callback_userdata = NULL;
+	pair_callback_userdata = nullptr;
-	unpair_callback_userdata = NULL;
+	unpair_callback_userdata = nullptr;
 }
 
 #endif // OCTREE_H

core/math/quick_hull.cpp

@@ -399,7 +399,7 @@ Error QuickHull::build(const Vector<Vector3> &p_points, Geometry::MeshData &r_me
 			ERR_CONTINUE(!F);
 			List<Geometry::MeshData::Face>::Element *O = F->get().left == E ? F->get().right : F->get().left;
 			ERR_CONTINUE(O == E);
-			ERR_CONTINUE(O == NULL);
+			ERR_CONTINUE(O == nullptr);
 
 			if (O->get().plane.is_equal_approx(f.plane)) {
 				//merge and delete edge and contiguous face, while repointing edges (uuugh!)
@@ -440,10 +440,10 @@ Error QuickHull::build(const Vector<Vector3> &p_points, Geometry::MeshData &r_me
 				// remove all edge connections to this face
 				for (Map<Edge, RetFaceConnect>::Element *G = ret_edges.front(); G; G = G->next()) {
 					if (G->get().left == O)
-						G->get().left = NULL;
+						G->get().left = nullptr;
 
 					if (G->get().right == O)
-						G->get().right = NULL;
+						G->get().right = nullptr;
 				}
 
 				ret_edges.erase(F); //remove the edge

core/math/quick_hull.h

@@ -77,15 +77,15 @@ private:
 	struct FaceConnect {
 		List<Face>::Element *left, *right;
 		FaceConnect() {
-			left = NULL;
+			left = nullptr;
-			right = NULL;
+			right = nullptr;
 		}
 	};
 	struct RetFaceConnect {
 		List<Geometry::MeshData::Face>::Element *left, *right;
 		RetFaceConnect() {
-			left = NULL;
+			left = nullptr;
-			right = NULL;
+			right = nullptr;
 		}
 	};
 

core/math/rect2.h

@@ -105,7 +105,7 @@ struct Rect2 {
 
 	bool intersects_transformed(const Transform2D &p_xform, const Rect2 &p_rect) const;
 
-	bool intersects_segment(const Point2 &p_from, const Point2 &p_to, Point2 *r_pos = NULL, Point2 *r_normal = NULL) const;
+	bool intersects_segment(const Point2 &p_from, const Point2 &p_to, Point2 *r_pos = nullptr, Point2 *r_normal = nullptr) const;
 
 	inline bool encloses(const Rect2 &p_rect) const {
 

core/message_queue.cpp

@@ -34,7 +34,7 @@
 #include "core/project_settings.h"
 #include "core/script_language.h"
 
-MessageQueue *MessageQueue::singleton = NULL;
+MessageQueue *MessageQueue::singleton = nullptr;
 
 MessageQueue *MessageQueue::get_singleton() {
 
@@ -174,7 +174,7 @@ void MessageQueue::statistics() {
 
 		Object *target = message->callable.get_object();
 
-		if (target != NULL) {
+		if (target != nullptr) {
 
 			switch (message->type & FLAG_MASK) {
 
@@ -240,7 +240,7 @@ int MessageQueue::get_max_buffer_usage() const {
 
 void MessageQueue::_call_function(const Callable &p_callable, const Variant *p_args, int p_argcount, bool p_show_error) {
 
-	const Variant **argptrs = NULL;
+	const Variant **argptrs = nullptr;
 	if (p_argcount) {
 		argptrs = (const Variant **)alloca(sizeof(Variant *) * p_argcount);
 		for (int i = 0; i < p_argcount; i++) {
@@ -291,7 +291,7 @@ void MessageQueue::flush() {
 
 		Object *target = message->callable.get_object();
 
-		if (target != NULL) {
+		if (target != nullptr) {
 
 			switch (message->type & FLAG_MASK) {
 				case TYPE_CALL: {
@@ -343,7 +343,7 @@ bool MessageQueue::is_flushing() const {
 
 MessageQueue::MessageQueue() {
 
-	ERR_FAIL_COND_MSG(singleton != NULL, "A MessageQueue singleton already exists.");
+	ERR_FAIL_COND_MSG(singleton != nullptr, "A MessageQueue singleton already exists.");
 	singleton = this;
 	flushing = false;
 
@@ -375,6 +375,6 @@ MessageQueue::~MessageQueue() {
 			read_pos += sizeof(Variant) * message->args;
 	}
 
-	singleton = NULL;
+	singleton = nullptr;
 	memdelete_arr(buffer);
 }

core/method_bind.cpp

@@ -108,7 +108,7 @@ MethodBind::MethodBind() {
 	argument_count = 0;
 	default_argument_count = 0;
 #ifdef DEBUG_METHODS_ENABLED
-	argument_types = NULL;
+	argument_types = nullptr;
 #endif
 	_const = false;
 	_returns = false;

core/method_bind.h

@@ -382,7 +382,7 @@ public:
 	virtual bool is_vararg() const { return true; }
 
 	MethodBindVarArg() {
-		call_method = NULL;
+		call_method = nullptr;
 		_set_returns(true);
 	}
 };

core/node_path.cpp

@@ -99,7 +99,7 @@ void NodePath::unref() {
 
 		memdelete(data);
 	}
-	data = NULL;
+	data = nullptr;
 }
 
 bool NodePath::operator==(const NodePath &p_path) const {
@@ -189,7 +189,7 @@ NodePath::operator String() const {
 
 NodePath::NodePath(const NodePath &p_path) {
 
-	data = NULL;
+	data = nullptr;
 
 	if (p_path.data && p_path.data->refcount.ref()) {
 
@@ -287,7 +287,7 @@ NodePath NodePath::get_as_property_path() const {
 
 NodePath::NodePath(const Vector<StringName> &p_path, bool p_absolute) {
 
-	data = NULL;
+	data = nullptr;
 
 	if (p_path.size() == 0)
 		return;
@@ -302,7 +302,7 @@ NodePath::NodePath(const Vector<StringName> &p_path, bool p_absolute) {
 
 NodePath::NodePath(const Vector<StringName> &p_path, const Vector<StringName> &p_subpath, bool p_absolute) {
 
-	data = NULL;
+	data = nullptr;
 
 	if (p_path.size() == 0 && p_subpath.size() == 0)
 		return;
@@ -349,7 +349,7 @@ NodePath NodePath::simplified() const {
 
 NodePath::NodePath(const String &p_path) {
 
-	data = NULL;
+	data = nullptr;
 
 	if (p_path.length() == 0)
 		return;
@@ -442,7 +442,7 @@ bool NodePath::is_empty() const {
 }
 NodePath::NodePath() {
 
-	data = NULL;
+	data = nullptr;
 }
 
 NodePath::~NodePath() {

core/oa_hash_map.h

@@ -224,7 +224,7 @@ public:
 	/**
 	 * returns true if the value was found, false otherwise.
 	 *
-	 * if r_data is not NULL then the value will be written to the object
+	 * if r_data is not nullptr  then the value will be written to the object
 	 * it points to.
 	 */
 	bool lookup(const TKey &p_key, TValue &r_data) const {
@@ -243,7 +243,7 @@ public:
 	/**
 	 * returns true if the value was found, false otherwise.
 	 *
-	 * if r_data is not NULL then the value will be written to the object
+	 * if r_data is not nullptr  then the value will be written to the object
 	 * it points to.
 	 */
 	TValue *lookup_ptr(const TKey &p_key) const {
@@ -253,7 +253,7 @@ public:
 		if (exists) {
 			return &values[pos];
 		}
-		return NULL;
+		return nullptr;
 	}
 
 	_FORCE_INLINE_ bool has(const TKey &p_key) const {
@@ -325,8 +325,8 @@ public:
 		Iterator it;
 		it.valid = false;
 		it.pos = p_iter.pos;
-		it.key = NULL;
+		it.key = nullptr;
-		it.value = NULL;
+		it.value = nullptr;
 
 		for (uint32_t i = it.pos; i < capacity; i++) {
 			it.pos = i + 1;

core/object.cpp

@@ -368,7 +368,7 @@ bool Object::_predelete() {
 	_predelete_ok = 1;
 	notification(NOTIFICATION_PREDELETE, true);
 	if (_predelete_ok) {
-		_class_ptr = NULL; //must restore so destructors can access class ptr correctly
+		_class_ptr = nullptr; //must restore so destructors can access class ptr correctly
 	}
 	return _predelete_ok;
 }
@@ -781,7 +781,7 @@ bool Object::has_method(const StringName &p_method) const {
 
 	MethodBind *method = ClassDB::get_method(get_class_name(), p_method);
 
-	return method != NULL;
+	return method != nullptr;
 }
 
 Variant Object::getvar(const Variant &p_key, bool *r_valid) const {
@@ -797,7 +797,7 @@ void Object::setvar(const Variant &p_key, const Variant &p_value, bool *r_valid)
 }
 
 Variant Object::callv(const StringName &p_method, const Array &p_args) {
-	const Variant **argptrs = NULL;
+	const Variant **argptrs = nullptr;
 
 	if (p_args.size() > 0) {
 		argptrs = (const Variant **)alloca(sizeof(Variant *) * p_args.size());
@@ -955,7 +955,7 @@ void Object::set_script_and_instance(const Variant &p_script, ScriptInstance *p_
 	//this function is not meant to be used in any of these ways
 	ERR_FAIL_COND(p_script.is_null());
 	ERR_FAIL_COND(!p_instance);
-	ERR_FAIL_COND(script_instance != NULL || !script.is_null());
+	ERR_FAIL_COND(script_instance != nullptr || !script.is_null());
 
 	script = p_script;
 	script_instance = p_instance;
@@ -968,7 +968,7 @@ void Object::set_script(const Variant &p_script) {
 
 	if (script_instance) {
 		memdelete(script_instance);
-		script_instance = NULL;
+		script_instance = nullptr;
 	}
 
 	script = p_script;
@@ -1119,7 +1119,7 @@ Variant Object::_emit_signal(const Variant **p_args, int p_argcount, Callable::C
 
 	StringName signal = *p_args[0];
 
-	const Variant **args = NULL;
+	const Variant **args = nullptr;
 
 	int argc = p_argcount - 1;
 	if (argc) {
@@ -1354,7 +1354,7 @@ void Object::get_signal_list(List<MethodInfo> *p_signals) const {
 
 	ClassDB::get_signal_list(get_class_name(), p_signals);
 	//find maybe usersignals?
-	const StringName *S = NULL;
+	const StringName *S = nullptr;
 
 	while ((S = signal_map.next(S))) {
 
@@ -1367,7 +1367,7 @@ void Object::get_signal_list(List<MethodInfo> *p_signals) const {
 
 void Object::get_all_signal_connections(List<Connection> *p_connections) const {
 
-	const StringName *S = NULL;
+	const StringName *S = nullptr;
 
 	while ((S = signal_map.next(S))) {
 
@@ -1393,7 +1393,7 @@ void Object::get_signal_connection_list(const StringName &p_signal, List<Connect
 int Object::get_persistent_signal_connection_count() const {
 
 	int count = 0;
-	const StringName *S = NULL;
+	const StringName *S = nullptr;
 
 	while ((S = signal_map.next(S))) {
 
@@ -1505,7 +1505,7 @@ bool Object::is_connected(const StringName &p_signal, const Callable &p_callable
 
 	return s->slot_map.has(target);
 	//const Map<Signal::Target,Signal::Slot>::Element *E = s->slot_map.find(target);
-	//return (E!=NULL);
+	//return (E!=nullptr );
 }
 
 void Object::disconnect_compat(const StringName &p_signal, Object *p_to_object, const StringName &p_to_method) {
@@ -1840,7 +1840,7 @@ Variant::Type Object::get_static_property_type_indexed(const Vector<StringName>
 	}
 
 	Callable::CallError ce;
-	Variant check = Variant::construct(t, NULL, 0, ce);
+	Variant check = Variant::construct(t, nullptr, 0, ce);
 
 	for (int i = 1; i < p_path.size(); i++) {
 		if (check.get_type() == Variant::OBJECT || check.get_type() == Variant::DICTIONARY || check.get_type() == Variant::ARRAY) {
@@ -1889,7 +1889,7 @@ uint32_t Object::get_edited_version() const {
 
 void *Object::get_script_instance_binding(int p_script_language_index) {
 #ifdef DEBUG_ENABLED
-	ERR_FAIL_INDEX_V(p_script_language_index, MAX_SCRIPT_INSTANCE_BINDINGS, NULL);
+	ERR_FAIL_INDEX_V(p_script_language_index, MAX_SCRIPT_INSTANCE_BINDINGS, nullptr);
 #endif
 
 	//it's up to the script language to make this thread safe, if the function is called twice due to threads being out of syncro
@@ -1910,19 +1910,19 @@ void *Object::get_script_instance_binding(int p_script_language_index) {
 
 bool Object::has_script_instance_binding(int p_script_language_index) {
 
-	return _script_instance_bindings[p_script_language_index] != NULL;
+	return _script_instance_bindings[p_script_language_index] != nullptr;
 }
 
 void Object::set_script_instance_binding(int p_script_language_index, void *p_data) {
 #ifdef DEBUG_ENABLED
-	CRASH_COND(_script_instance_bindings[p_script_language_index] != NULL);
+	CRASH_COND(_script_instance_bindings[p_script_language_index] != nullptr);
 #endif
 	_script_instance_bindings[p_script_language_index] = p_data;
 }
 
 void Object::_construct_object(bool p_reference) {
 	type_is_reference = p_reference;
-	_class_ptr = NULL;
+	_class_ptr = nullptr;
 	_block_signals = false;
 	_predelete_ok = 0;
 	_instance_id = ObjectDB::add_instance(this);
@@ -1931,7 +1931,7 @@ void Object::_construct_object(bool p_reference) {
 	_emitting = false;
 	instance_binding_count = 0;
 	memset(_script_instance_bindings, 0, sizeof(void *) * MAX_SCRIPT_INSTANCE_BINDINGS);
-	script_instance = NULL;
+	script_instance = nullptr;
 #ifdef TOOLS_ENABLED
 
 	_edited = false;
@@ -1955,16 +1955,16 @@ Object::~Object() {
 
 	if (script_instance)
 		memdelete(script_instance);
-	script_instance = NULL;
+	script_instance = nullptr;
 
-	const StringName *S = NULL;
+	const StringName *S = nullptr;
 
 	if (_emitting) {
 		//@todo this may need to actually reach the debugger prioritarily somehow because it may crash before
 		ERR_PRINT("Object " + to_string() + " was freed or unreferenced while a signal is being emitted from it. Try connecting to the signal using 'CONNECT_DEFERRED' flag, or use queue_free() to free the object (if this object is a Node) to avoid this error and potential crashes.");
 	}
 
-	while ((S = signal_map.next(NULL))) {
+	while ((S = signal_map.next(nullptr))) {
 
 		SignalData *s = &signal_map[*S];
 

core/object.h

@@ -242,7 +242,7 @@ struct MethodInfo {
 //if ( is_type(T::get_class_static()) )
 //return static_cast<T*>(this);
 ////else
-//return NULL;
+//return nullptr;
 
 /*
    the following is an incomprehensible blob of hacks and workarounds to compensate for many of the fallencies in C++. As a plus, this macro pretty much alone defines the object model.
@@ -591,11 +591,11 @@ public:
 		return dynamic_cast<T *>(p_object);
 #else
 		if (!p_object)
-			return NULL;
+			return nullptr;
 		if (p_object->is_class_ptr(T::get_class_ptr_static()))
 			return static_cast<T *>(p_object);
 		else
-			return NULL;
+			return nullptr;
 #endif
 	}
 
@@ -605,11 +605,11 @@ public:
 		return dynamic_cast<const T *>(p_object);
 #else
 		if (!p_object)
-			return NULL;
+			return nullptr;
 		if (p_object->is_class_ptr(T::get_class_ptr_static()))
 			return static_cast<const T *>(p_object);
 		else
-			return NULL;
+			return nullptr;
 #endif
 	}
 
@@ -644,10 +644,10 @@ public:
 	//void set(const String& p_name, const Variant& p_value);
 	//Variant get(const String& p_name) const;
 
-	void set(const StringName &p_name, const Variant &p_value, bool *r_valid = NULL);
+	void set(const StringName &p_name, const Variant &p_value, bool *r_valid = nullptr);
-	Variant get(const StringName &p_name, bool *r_valid = NULL) const;
+	Variant get(const StringName &p_name, bool *r_valid = nullptr) const;
-	void set_indexed(const Vector<StringName> &p_names, const Variant &p_value, bool *r_valid = NULL);
+	void set_indexed(const Vector<StringName> &p_names, const Variant &p_value, bool *r_valid = nullptr);
-	Variant get_indexed(const Vector<StringName> &p_names, bool *r_valid = NULL) const;
+	Variant get_indexed(const Vector<StringName> &p_names, bool *r_valid = nullptr) const;
 
 	void get_property_list(List<PropertyInfo> *p_list, bool p_reversed = false) const;
 
@@ -664,8 +664,8 @@ public:
 	String to_string();
 
 	//used mainly by script, get and set all INCLUDING string
-	virtual Variant getvar(const Variant &p_key, bool *r_valid = NULL) const;
+	virtual Variant getvar(const Variant &p_key, bool *r_valid = nullptr) const;
-	virtual void setvar(const Variant &p_key, const Variant &p_value, bool *r_valid = NULL);
+	virtual void setvar(const Variant &p_key, const Variant &p_value, bool *r_valid = nullptr);
 
 	/* SCRIPT */
 
@@ -715,8 +715,8 @@ public:
 	void set_block_signals(bool p_block);
 	bool is_blocking_signals() const;
 
-	Variant::Type get_static_property_type(const StringName &p_property, bool *r_valid = NULL) const;
+	Variant::Type get_static_property_type(const StringName &p_property, bool *r_valid = nullptr) const;
-	Variant::Type get_static_property_type_indexed(const Vector<StringName> &p_path, bool *r_valid = NULL) const;
+	Variant::Type get_static_property_type_indexed(const Vector<StringName> &p_path, bool *r_valid = nullptr) const;
 
 	virtual void get_translatable_strings(List<String> *p_strings) const;
 

core/ordered_hash_map.h

@@ -70,9 +70,9 @@ public:
 
 	public:
 		_FORCE_INLINE_ Element() :
-				list_element(NULL),
+				list_element(nullptr),
-				prev_element(NULL),
+				prev_element(nullptr),
-				next_element(NULL) {
+				next_element(nullptr) {
 		}
 
 		Element next() const {
@@ -104,7 +104,7 @@ public:
 		}
 
 		operator bool() const {
-			return (list_element != NULL);
+			return (list_element != nullptr);
 		}
 
 		const K &key() const {
@@ -144,7 +144,7 @@ public:
 
 	public:
 		_FORCE_INLINE_ ConstElement() :
-				list_element(NULL) {
+				list_element(nullptr) {
 		}
 
 		ConstElement(const ConstElement &other) :
@@ -157,11 +157,11 @@ public:
 		}
 
 		ConstElement next() const {
-			return ConstElement(list_element ? list_element->next() : NULL);
+			return ConstElement(list_element ? list_element->next() : nullptr);
 		}
 
 		ConstElement prev() const {
-			return ConstElement(list_element ? list_element->prev() : NULL);
+			return ConstElement(list_element ? list_element->prev() : nullptr);
 		}
 
 		_FORCE_INLINE_ bool operator==(const ConstElement &p_other) const {
@@ -172,7 +172,7 @@ public:
 		}
 
 		operator bool() const {
-			return (list_element != NULL);
+			return (list_element != nullptr);
 		}
 
 		const K &key() const {
@@ -196,7 +196,7 @@ public:
 		if (list_element) {
 			return ConstElement(*list_element);
 		}
-		return ConstElement(NULL);
+		return ConstElement(nullptr);
 	}
 
 	Element find(const K &p_key) {
@@ -204,7 +204,7 @@ public:
 		if (list_element) {
 			return Element(*list_element);
 		}
-		return Element(NULL);
+		return Element(nullptr);
 	}
 
 	Element insert(const K &p_key, const V &p_value) {
@@ -213,7 +213,7 @@ public:
 			(*list_element)->get().second = p_value;
 			return Element(*list_element);
 		}
-		typename InternalList::Element *new_element = list.push_back(Pair<const K *, V>(NULL, p_value));
+		typename InternalList::Element *new_element = list.push_back(Pair<const K *, V>(nullptr, p_value));
 		typename InternalMap::Element *e = map.set(p_key, new_element);
 		new_element->get().first = &e->key();
 
@@ -223,7 +223,7 @@ public:
 	void erase(Element &p_element) {
 		map.erase(p_element.key());
 		list.erase(p_element.list_element);
-		p_element.list_element = NULL;
+		p_element.list_element = nullptr;
 	}
 
 	bool erase(const K &p_key) {

core/os/dir_access.cpp

@@ -226,11 +226,11 @@ String DirAccess::fix_path(String p_path) const {
 	return p_path;
 }
 
-DirAccess::CreateFunc DirAccess::create_func[ACCESS_MAX] = { 0, 0, 0 };
+DirAccess::CreateFunc DirAccess::create_func[ACCESS_MAX] = { nullptr, nullptr, nullptr };
 
 DirAccess *DirAccess::create_for_path(const String &p_path) {
 
-	DirAccess *da = NULL;
+	DirAccess *da = nullptr;
 	if (p_path.begins_with("res://")) {
 
 		da = create(ACCESS_RESOURCES);
@@ -249,13 +249,13 @@ DirAccess *DirAccess::open(const String &p_path, Error *r_error) {
 
 	DirAccess *da = create_for_path(p_path);
 
-	ERR_FAIL_COND_V_MSG(!da, NULL, "Cannot create DirAccess for path '" + p_path + "'.");
+	ERR_FAIL_COND_V_MSG(!da, nullptr, "Cannot create DirAccess for path '" + p_path + "'.");
 	Error err = da->change_dir(p_path);
 	if (r_error)
 		*r_error = err;
 	if (err != OK) {
 		memdelete(da);
-		return NULL;
+		return nullptr;
 	}
 
 	return da;
@@ -263,7 +263,7 @@ DirAccess *DirAccess::open(const String &p_path, Error *r_error) {
 
 DirAccess *DirAccess::create(AccessType p_access) {
 
-	DirAccess *da = create_func[p_access] ? create_func[p_access]() : NULL;
+	DirAccess *da = create_func[p_access] ? create_func[p_access]() : nullptr;
 	if (da) {
 		da->_access_type = p_access;
 	}

core/os/dir_access.h

@@ -128,7 +128,7 @@ public:
 		create_func[p_access] = _create_builtin<T>;
 	}
 
-	static DirAccess *open(const String &p_path, Error *r_error = NULL);
+	static DirAccess *open(const String &p_path, Error *r_error = nullptr);
 
 	DirAccess();
 	virtual ~DirAccess();
@@ -141,7 +141,7 @@ struct DirAccessRef {
 		return f;
 	}
 
-	operator bool() const { return f != NULL; }
+	operator bool() const { return f != nullptr; }
 	DirAccess *f;
 	DirAccessRef(DirAccess *fa) { f = fa; }
 	~DirAccessRef() {

core/os/file_access.cpp

@@ -36,15 +36,15 @@
 #include "core/os/os.h"
 #include "core/project_settings.h"
 
-FileAccess::CreateFunc FileAccess::create_func[ACCESS_MAX] = { 0, 0 };
+FileAccess::CreateFunc FileAccess::create_func[ACCESS_MAX] = { nullptr, nullptr };
 
-FileAccess::FileCloseFailNotify FileAccess::close_fail_notify = NULL;
+FileAccess::FileCloseFailNotify FileAccess::close_fail_notify = nullptr;
 
 bool FileAccess::backup_save = false;
 
 FileAccess *FileAccess::create(AccessType p_access) {
 
-	ERR_FAIL_INDEX_V(p_access, ACCESS_MAX, 0);
+	ERR_FAIL_INDEX_V(p_access, ACCESS_MAX, nullptr);
 
 	FileAccess *ret = create_func[p_access]();
 	ret->_set_access_type(p_access);
@@ -70,7 +70,7 @@ void FileAccess::_set_access_type(AccessType p_access) {
 
 FileAccess *FileAccess::create_for_path(const String &p_path) {
 
-	FileAccess *ret = NULL;
+	FileAccess *ret = nullptr;
 	if (p_path.begins_with("res://")) {
 
 		ret = create(ACCESS_RESOURCES);
@@ -95,7 +95,7 @@ FileAccess *FileAccess::open(const String &p_path, int p_mode_flags, Error *r_er
 
 	//try packed data first
 
-	FileAccess *ret = NULL;
+	FileAccess *ret = nullptr;
 	if (!(p_mode_flags & WRITE) && PackedData::get_singleton() && !PackedData::get_singleton()->is_disabled()) {
 		ret = PackedData::get_singleton()->try_open_path(p_path);
 		if (ret) {
@@ -113,7 +113,7 @@ FileAccess *FileAccess::open(const String &p_path, int p_mode_flags, Error *r_er
 	if (err != OK) {
 
 		memdelete(ret);
-		ret = NULL;
+		ret = nullptr;
 	}
 
 	return ret;

core/os/file_access.h

@@ -153,7 +153,7 @@ public:
 
 	static FileAccess *create(AccessType p_access); /// Create a file access (for the current platform) this is the only portable way of accessing files.
 	static FileAccess *create_for_path(const String &p_path);
-	static FileAccess *open(const String &p_path, int p_mode_flags, Error *r_error = NULL); /// Create a file access (for the current platform) this is the only portable way of accessing files.
+	static FileAccess *open(const String &p_path, int p_mode_flags, Error *r_error = nullptr); /// Create a file access (for the current platform) this is the only portable way of accessing files.
 	static CreateFunc get_create_func(AccessType p_access);
 	static bool exists(const String &p_name); ///< return true if a file exists
 	static uint64_t get_modified_time(const String &p_file);
@@ -167,8 +167,8 @@ public:
 	static String get_sha256(const String &p_file);
 	static String get_multiple_md5(const Vector<String> &p_file);
 
-	static Vector<uint8_t> get_file_as_array(const String &p_path, Error *r_error = NULL);
+	static Vector<uint8_t> get_file_as_array(const String &p_path, Error *r_error = nullptr);
-	static String get_file_as_string(const String &p_path, Error *r_error = NULL);
+	static String get_file_as_string(const String &p_path, Error *r_error = nullptr);
 
 	template <class T>
 	static void make_default(AccessType p_access) {
@@ -187,7 +187,7 @@ struct FileAccessRef {
 		return f;
 	}
 
-	operator bool() const { return f != NULL; }
+	operator bool() const { return f != nullptr; }
 	FileAccess *f;
 	operator FileAccess *() { return f; }
 	FileAccessRef(FileAccess *fa) { f = fa; }

core/os/keyboard.cpp

@@ -288,7 +288,7 @@ static const _KeyCodeText _keycodes[] = {
 
 		{KEY_DIVISION                      ,"Division"},
 		{KEY_YDIAERESIS                    ,"Ydiaeresis"},
-		{0                                 ,0}
+		{0                                 ,nullptr}
 	/* clang-format on */
 };
 

core/os/memory.cpp

@@ -81,7 +81,7 @@ void *Memory::alloc_static(size_t p_bytes, bool p_pad_align) {
 
 	void *mem = malloc(p_bytes + (prepad ? PAD_ALIGN : 0));
 
-	ERR_FAIL_COND_V(!mem, NULL);
+	ERR_FAIL_COND_V(!mem, nullptr);
 
 	atomic_increment(&alloc_count);
 
@@ -103,7 +103,7 @@ void *Memory::alloc_static(size_t p_bytes, bool p_pad_align) {
 
 void *Memory::realloc_static(void *p_memory, size_t p_bytes, bool p_pad_align) {
 
-	if (p_memory == NULL) {
+	if (p_memory == nullptr) {
 		return alloc_static(p_bytes, p_pad_align);
 	}
 
@@ -130,12 +130,12 @@ void *Memory::realloc_static(void *p_memory, size_t p_bytes, bool p_pad_align) {
 
 		if (p_bytes == 0) {
 			free(mem);
-			return NULL;
+			return nullptr;
 		} else {
 			*s = p_bytes;
 
 			mem = (uint8_t *)realloc(mem, p_bytes + PAD_ALIGN);
-			ERR_FAIL_COND_V(!mem, NULL);
+			ERR_FAIL_COND_V(!mem, nullptr);
 
 			s = (uint64_t *)mem;
 
@@ -147,7 +147,7 @@ void *Memory::realloc_static(void *p_memory, size_t p_bytes, bool p_pad_align) {
 
 		mem = (uint8_t *)realloc(mem, p_bytes);
 
-		ERR_FAIL_COND_V(mem == NULL && p_bytes > 0, NULL);
+		ERR_FAIL_COND_V(mem == nullptr && p_bytes > 0, nullptr);
 
 		return mem;
 	}
@@ -155,7 +155,7 @@ void *Memory::realloc_static(void *p_memory, size_t p_bytes, bool p_pad_align) {
 
 void Memory::free_static(void *p_ptr, bool p_pad_align) {
 
-	ERR_FAIL_COND(p_ptr == NULL);
+	ERR_FAIL_COND(p_ptr == nullptr);
 
 	uint8_t *mem = (uint8_t *)p_ptr;
 

core/os/midi_driver.cpp

@@ -34,7 +34,7 @@
 #include "core/os/os.h"
 
 uint8_t MIDIDriver::last_received_message = 0x00;
-MIDIDriver *MIDIDriver::singleton = NULL;
+MIDIDriver *MIDIDriver::singleton = nullptr;
 MIDIDriver *MIDIDriver::get_singleton() {
 
 	return singleton;

core/os/os.cpp

@@ -40,7 +40,7 @@
 
 #include <stdarg.h>
 
-OS *OS::singleton = NULL;
+OS *OS::singleton = nullptr;
 
 OS *OS::get_singleton() {
 
@@ -184,7 +184,7 @@ void OS::dump_memory_to_file(const char *p_file) {
 	//Memory::dump_static_mem_to_file(p_file);
 }
 
-static FileAccess *_OSPRF = NULL;
+static FileAccess *_OSPRF = nullptr;
 
 static void _OS_printres(Object *p_obj) {
 
@@ -207,7 +207,7 @@ void OS::print_all_resources(String p_to_file) {
 		Error err;
 		_OSPRF = FileAccess::open(p_to_file, FileAccess::WRITE, &err);
 		if (err != OK) {
-			_OSPRF = NULL;
+			_OSPRF = nullptr;
 			ERR_FAIL_MSG("Can't print all resources to file: " + String(p_to_file) + ".");
 		}
 	}
@@ -218,13 +218,13 @@ void OS::print_all_resources(String p_to_file) {
 
 		if (_OSPRF)
 			memdelete(_OSPRF);
-		_OSPRF = NULL;
+		_OSPRF = nullptr;
 	}
 }
 
 void OS::print_resources_in_use(bool p_short) {
 
-	ResourceCache::dump(NULL, p_short);
+	ResourceCache::dump(nullptr, p_short);
 }
 
 void OS::dump_resources_to_file(const char *p_file) {
@@ -523,9 +523,9 @@ OS::OS() {
 	_allow_layered = false;
 	_stack_bottom = (void *)(&stack_bottom);
 
-	_logger = NULL;
+	_logger = nullptr;
 
-	has_server_feature_callback = NULL;
+	has_server_feature_callback = nullptr;
 
 	Vector<Logger *> loggers;
 	loggers.push_back(memnew(StdLogger));
@@ -534,5 +534,5 @@ OS::OS() {
 
 OS::~OS() {
 	memdelete(_logger);
-	singleton = NULL;
+	singleton = nullptr;
 }

core/os/os.h

@@ -130,7 +130,7 @@ public:
 	virtual int get_low_processor_usage_mode_sleep_usec() const;
 
 	virtual String get_executable_path() const;
-	virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking = true, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL, bool read_stderr = false, Mutex *p_pipe_mutex = NULL) = 0;
+	virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking = true, ProcessID *r_child_id = nullptr, String *r_pipe = nullptr, int *r_exitcode = nullptr, bool read_stderr = false, Mutex *p_pipe_mutex = nullptr) = 0;
 	virtual Error kill(const ProcessID &p_pid) = 0;
 	virtual int get_process_id() const;
 	virtual void vibrate_handheld(int p_duration_ms = 500);

core/os/rw_lock.cpp

@@ -34,11 +34,11 @@
 
 #include <stddef.h>
 
-RWLock *(*RWLock::create_func)() = 0;
+RWLock *(*RWLock::create_func)() = nullptr;
 
 RWLock *RWLock::create() {
 
-	ERR_FAIL_COND_V(!create_func, 0);
+	ERR_FAIL_COND_V(!create_func, nullptr);
 
 	return create_func();
 }

core/os/thread.cpp

@@ -30,10 +30,10 @@
 
 #include "thread.h"
 
-Thread *(*Thread::create_func)(ThreadCreateCallback, void *, const Settings &) = NULL;
+Thread *(*Thread::create_func)(ThreadCreateCallback, void *, const Settings &) = nullptr;
-Thread::ID (*Thread::get_thread_id_func)() = NULL;
+Thread::ID (*Thread::get_thread_id_func)() = nullptr;
-void (*Thread::wait_to_finish_func)(Thread *) = NULL;
+void (*Thread::wait_to_finish_func)(Thread *) = nullptr;
-Error (*Thread::set_name_func)(const String &) = NULL;
+Error (*Thread::set_name_func)(const String &) = nullptr;
 
 Thread::ID Thread::_main_thread_id = 0;
 
@@ -50,7 +50,7 @@ Thread *Thread::create(ThreadCreateCallback p_callback, void *p_user, const Sett
 
 		return create_func(p_callback, p_user, p_settings);
 	}
-	return NULL;
+	return nullptr;
 }
 
 void Thread::wait_to_finish(Thread *p_thread) {

core/packed_data_container.cpp

@@ -114,7 +114,7 @@ Variant PackedDataContainer::_get_at_ofs(uint32_t p_ofs, const uint8_t *p_buf, b
 	} else {
 
 		Variant v;
-		Error rerr = decode_variant(v, p_buf + p_ofs, datalen - p_ofs, NULL, false);
+		Error rerr = decode_variant(v, p_buf + p_ofs, datalen - p_ofs, nullptr, false);
 
 		if (rerr != OK) {
 
@@ -254,7 +254,7 @@ uint32_t PackedDataContainer::_pack(const Variant &p_data, Vector<uint8_t> &tmpd
 
 			uint32_t pos = tmpdata.size();
 			int len;
-			encode_variant(p_data, NULL, len, false);
+			encode_variant(p_data, nullptr, len, false);
 			tmpdata.resize(tmpdata.size() + len);
 			encode_variant(p_data, &tmpdata.write[pos], len, false);
 			return pos;

core/packed_data_container.h

@@ -73,7 +73,7 @@ protected:
 	static void _bind_methods();
 
 public:
-	virtual Variant getvar(const Variant &p_key, bool *r_valid = NULL) const;
+	virtual Variant getvar(const Variant &p_key, bool *r_valid = nullptr) const;
 	Error pack(const Variant &p_data);
 
 	int size() const;
@@ -98,7 +98,7 @@ public:
 	bool _is_dictionary() const;
 
 	int size() const;
-	virtual Variant getvar(const Variant &p_key, bool *r_valid = NULL) const;
+	virtual Variant getvar(const Variant &p_key, bool *r_valid = nullptr) const;
 
 	PackedDataContainerRef();
 };