Implement OwningRawPointerContainer utility

kdevplatform/util/CMakeLists.txt

@@ -91,6 +91,7 @@ install( FILES
     convenientfreelist.h
     multilevellistview.h
     objectlist.h
+    owningrawpointercontainer.h
     placeholderitemproxymodel.h
     projecttestjob.h
     widgetcolorizer.h

kdevplatform/util/owningrawpointercontainer.h

+/*
+    SPDX-FileCopyrightText: 2021 Igor Kushnir <igorkuo@gmail.com>
+
+    SPDX-License-Identifier: LGPL-2.0-or-later
+*/
+
+#ifndef KDEVPLATFORM_OWNING_RAW_POINTER_CONTAINER_H
+#define KDEVPLATFORM_OWNING_RAW_POINTER_CONTAINER_H
+
+#include <utility>
+
+namespace KDevelop {
+
+/**
+ * A RAII wrapper for a container of owning raw pointers.
+ *
+ * Storing an OwningRawPointerContainer<C> in a class is equivalent to storing
+ * C @a c itself and calling qDeleteAll(@a c) in the destructor. The only usage
+ * difference is dereferencing OwningRawPointerContainer via operator* or operator->.
+ */
+template<typename C>
+class OwningRawPointerContainer
+{
+public:
+    OwningRawPointerContainer() = default;
+
+    OwningRawPointerContainer(OwningRawPointerContainer&& other)
+        : m_c{std::move(other.m_c)}
+    {
+        other.m_c = {};
+    }
+
+    OwningRawPointerContainer(const OwningRawPointerContainer&) = delete;
+
+    ~OwningRawPointerContainer()
+    {
+        for (const auto* ptr : std::as_const(m_c)) {
+            delete ptr;
+        }
+    }
+
+    OwningRawPointerContainer& operator=(OwningRawPointerContainer&& other)
+    {
+        m_c = std::move(other.m_c);
+        other.m_c = {};
+    }
+
+    OwningRawPointerContainer& operator=(const OwningRawPointerContainer&) = delete;
+
+    const C& operator*() const
+    {
+        return m_c;
+    }
+    C& operator*()
+    {
+        return m_c;
+    }
+
+    const C* operator->() const
+    {
+        return &m_c;
+    }
+    C* operator->()
+    {
+        return &m_c;
+    }
+
+private:
+    C m_c{};
+};
+}
+
+#endif // KDEVPLATFORM_OWNING_RAW_POINTER_CONTAINER_H