private static Block ParseConcat(Block a, Block b, char type)
{
if (a == null)
{
return(SignBlock.Create(b, OperatorBlock.ToSignType(type)));
}
if (b == null)
{
throw new ArgumentNullException();
}
else
{
return(TwoOperatorBlock.Create(a, b, OperatorBlock.ToTwoOperatorType(type)));
}
}
public override bool OperatorLowPriority(int p)
{
return(c < 0 ? OperatorBlock.GetPriority(SignType.Minus) < p : false);
}