Smart Pointers

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Purpose

A smart pointer is an abstract data type that has all features of a standard pointer and additionally provides automatic garbage collection. Smart pointers facilitate the dynamic memory operations. Their main advantage is reducing memory leaks and bugs due to poor memory management.

Smart Pointers in Qt

• QSharedDataPointer
• QExplicitlySharedDataPointer
• QtPatternist::AutoPtr (internal class)
• QSharedPointer
• QWeakPointer
• QPointer since Qt5 a wrapper around QWeakPointer. The class was once planned to be deprecated but instead was kept to support legacy code.
• QGuard (internal class)
• QScopedPointer
• QScopedArrayPointer

See also

• Count with me: how many smart pointer classes does Qt have?
• Continue using QPointer

References

Smart Pointer