FConcertClientLocalDataStore::FetchOrAdd

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Unreal Engine C++ API Reference > Plugins > ConcertSyncClient > FConcertClientLocalDataStore

References

template<typename T>  
TConcertDataStoreResult< T > FetchOrAdd  
&40;  
    const FName & Key,  
    const T & InitialValue  
&41;  
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template<typename T> TConcertDataStoreResult< T > FetchOrAdd &40;     const FName & Key,     const T & InitialValue &41;

Remarks

Searches the store for the specified key, if not found, adds a new key/value pair, otherwise, if the stored value type matches the initial value type, fetches the stored value. The function accepts a USTRUCT() type or a supported basic type directly. To store complex types such as TArray<> TMap<> or TSet<>, wrap the type in a USTRUCT(). The operation result. The possible result codes are:

• EConcertDataStoreResultCode::Added if the key/value was added. The result holds a pointer on the newly added value.
• EConcertDataStoreResultCode::Fetched if the key was already taken and type matched. The result holds a pointer on the fetched value.
• EConcertDataStoreResultCode::TypeMismatch if the key was already taken but the types did not match. The result holds a null pointer.

Parameters

See Also

The class documentation for an example.