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How to use TGuard?

How to use TGuard expression?

I see the following in CharacterMovementComponent.cpp

 TGuardValue<FVector> RestoreAcceleration(Acceleration, FVector::ZeroVector);
                 TGuardValue<FVector> RestoreVelocity(Velocity, Velocity);

I don't understand what its doing and why

Product Version: UE 4.10
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asked Dec 01 '15 at 10:35 AM in C++ Programming

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Commander Shepard
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Exception-safe guard around saving/restoring a value. Commonly used to make sure a value is restored even if the code early outs in the future. Usage: TGuardValue GuardSomeBool(bSomeBool, false); /// Sets bSomeBool to false, and restores it in dtor.

Meh!. dtor is abbrevation for destructor

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answered Dec 01 '15 at 11:56 PM

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Commander Shepard
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