add EditorUI::sliderChanged + Result::ok + bump version

VERSION

@@ -1 +1 @@
-1.0.0-beta.8
+1.0.0-beta.9

bindings/GeometryDash.bro

@@ -1275,6 +1275,7 @@ class EditorUI : cocos2d::CCLayer, FLAlertLayerProtocol, ColorSelectDelegate, GJ
     void alignObjects(cocos2d::CCArray* objs, bool alignY) = mac 0x2cea0, win 0x8f320;
     virtual void scrollWheel(float vertical, float horizontal) = win 0x921d0, mac 0x31370, ios 0x2c4884;
     void createMoveMenu() = mac 0x275e0, win 0x8c0d0;
+    void sliderChanged(cocos2d::CCObject* slider) = win 0x78cc0;
 
     bool m_isPlayingMusic;
     EditButtonBar* m_buttonBar;

loader/include/Geode/utils/Result.hpp

@@ -204,6 +204,50 @@ namespace geode {
         [[nodiscard]] constexpr decltype(auto) errorOr(U&& val) const& {
             return this->Base::error_or(std::forward<U>(val));
         }
+
+        /**
+         * Convert the result into an optional containing the value if Ok, and 
+         * nullopt if Err
+         */
+        [[nodiscard]] constexpr decltype(auto) ok() const& {
+            if (this->isOk()) {
+                return std::optional(this->unwrap());
+            }
+            return std::nullopt;
+        }
+
+        /**
+         * Convert the result into an optional containing the value if Ok, and 
+         * nullopt if Err
+         */
+        [[nodiscard]] constexpr decltype(auto) ok() && {
+            if (this->isOk()) {
+                return std::optional(this->unwrap());
+            }
+            return std::nullopt;
+        }
+
+        /**
+         * Convert the result into an optional containing the error if Err, and 
+         * nullopt if Ok
+         */
+        [[nodiscard]] constexpr decltype(auto) err() const& {
+            if (this->isErr()) {
+                return std::optional(this->unwrapErr());
+            }
+            return std::nullopt;
+        }
+
+        /**
+         * Convert the result into an optional containing the error if Err, and 
+         * nullopt if Ok
+         */
+        [[nodiscard]] constexpr decltype(auto) err() && {
+            if (this->isErr()) {
+                return std::optional(this->unwrapErr());
+            }
+            return std::nullopt;
+        }
     };
 
     template <class T = impl::DefaultValue>