FConcertClientLocalDataStore::CompareExchange

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

References

template<typename T>  
TConcertDataStoreResult< T > CompareExchange  
&40;  
    const FName & Key,  
    const T & Expected,  
    const T & Desired  
&41;  
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template<typename T> TConcertDataStoreResult< T > CompareExchange &40;     const FName & Key,     const T & Expected,     const T & Desired &41;

Remarks

Exchanges the stored value to Desired if a stored value corresponding to Key exists, has the same type and its value is equal to Expected, otherwise, the operation fails. The operation result. The possible result codes are:

• EConcertDataStoreResultCode::Exchanged if the desired value was sucessfully exchanged and stored. The result holds a pointer on the newly stored value.
• EConcertDataStoreResultCode::Fetched if the stored value was not the expected one. The stored value was fetched instead. The result holds a pointer on the fetched value.
• EConcertDataStoreResultCode::NotFound if the key could not be found. The result holds a null pointer.
• EConcertDataStoreResultCode::TypeMismatch if the stored data type did not match the expected/desired type. The result holds a null pointer.

Parameters

See Also

The class documentation for an example.