MutableView

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References

template<typename T>  
decltype(auto) MutableView  
(  
    T & A  
)  
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template<typename T> decltype(auto) MutableView (     T & A )

Remarks

MutableView: safely obtain temporary mutable access to a TObjectPtr's underlying storage.

Basic Usage: void MutatingFunc(TArray& MutableArray);

TArray> Array; MutatingFunc(Array); // unsafe; compile error

MutatingFunc(MutableView(Array)); // ok; Array will safely "catch up" on TObjectPtr semantics when MutatingFunc returns.

/ it's generally preferable to pass references around (to avoid nullptr), / but for compat with existing functions that take a pointer: void NeedsAPointer(TArray* MutableArrayPtr); NeedsAPointer(ToRawPtr(MutableView(Array)));

Scoped Usage: TObjectPtr MyPtr; { auto MyScopedView = MutableView(MyPtr); UObject*& MyRawPtrRef = MyScopedView; // ok

UObject*& MyHardToFindBug = MutableView(MyPtr); // not ok }