moved files into src/common

src/common/NullablePtr.hpp

@@ -0,0 +1,59 @@
+#pragma once
+
+namespace chatterino {
+
+template <typename T>
+class NullablePtr
+{
+public:
+    NullablePtr()
+        : element_(nullptr)
+    {
+    }
+
+    NullablePtr(T *element)
+        : element_(element)
+    {
+    }
+
+    T *operator->() const
+    {
+        assert(this->hasElement());
+
+        return element_;
+    }
+
+    T &operator*() const
+    {
+        assert(this->hasElement());
+
+        return *element_;
+    }
+
+    T *get() const
+    {
+        assert(this->hasElement());
+
+        return this->element_;
+    }
+
+    bool isNull() const
+    {
+        return this->element_ == nullptr;
+    }
+
+    bool hasElement() const
+    {
+        return this->element_ != nullptr;
+    }
+
+    operator bool() const
+    {
+        return this->hasElement();
+    }
+
+private:
+    T *element_;
+};
+
+}  // namespace chatterino