static void InvertSign(nsStyleAnimation::Value& aValue) { switch (aValue.GetUnit()) { case nsStyleAnimation::eUnit_Coord: aValue.SetCoordValue(-aValue.GetCoordValue()); break; case nsStyleAnimation::eUnit_Percent: aValue.SetPercentValue(-aValue.GetPercentValue()); break; case nsStyleAnimation::eUnit_Float: aValue.SetFloatValue(-aValue.GetFloatValue()); break; default: NS_NOTREACHED("Calling InvertSign with an unsupported unit"); break; } }