chore: Inverse if-else tree in Timeline

include/core/timeline.h

@@ -15,7 +15,9 @@ template <class TNote,
 class Timeline
 {
   public:
-    explicit Timeline() : _current_offset(0) {}
+    explicit Timeline() : _current_offset(0)
+    {
+    }
 
     typedef typename std::set<TNote *>::const_iterator Iterator;
 
@@ -24,8 +26,9 @@ class Timeline
         _current_offset = offset;
         expire(_top_note);
 
-        if (!_timeline.empty())
-        {
+        if (_timeline.empty())
+            return;
+
         Iterator head_iterator = _timeline.begin();
 
         while (!isExpired(head_iterator))
@@ -48,7 +51,6 @@ class Timeline
         if (isExpired(_top_note))
             _top_note = _timeline.begin();
     }
-    }
 
     void setNotes(const std::set<TNote *, NotePtrComparator> &notes)
     {
@@ -128,11 +130,20 @@ class Timeline
         iterator = _timeline.end();
     }
 
-    inline Iterator getTopNote() const noexcept { return _top_note; }
+    inline Iterator getTopNote() const noexcept
+    {
+        return _top_note;
+    }
 
-    inline Iterator begin() const noexcept { return _timeline.begin(); }
+    inline Iterator begin() const noexcept
+    {
+        return _timeline.begin();
+    }
 
-    inline Iterator end() const noexcept { return _timeline.end(); }
+    inline Iterator end() const noexcept
+    {
+        return _timeline.end();
+    }
 
   private:
     std::set<TNote *, NotePtrComparator> _timeline;