public override DynValue Visit(DecrementationNode decrementationNode)
{
var numValue = Visit(decrementationNode.Target);
if (numValue.Type != DynValueType.Number)
{
throw new RuntimeException(
"Cannot decrement this value because it's not a number.", decrementationNode.Line
);
}
if (decrementationNode.IsPrefix)
{
var retVal = new DynValue(numValue.Number - 1);
numValue.CopyFrom(retVal);
return(retVal);
}
else
{
var retVal = numValue.Copy();
numValue.CopyFrom(new DynValue(numValue.Number - 1));
return(retVal);
}
}
public abstract DynValue Visit(DecrementationNode decrementationNode);