/// <summary>
/// Divide by x, return self
/// </summary>
// public abstract LispNumber Divide(LispNumber x);
// public abstract int Compare(LispNumber x);
public static SchNum Add(SchNum x, SchNum y)
{
if (object.ReferenceEquals(y, null) || y.isZero)
{
return(x);
}
var xType = x.valueType;
var yType = y.valueType;
if (ValueType.Double == xType || ValueType.Double == yType)
{
return(new SchDouble(x.AsDouble() + y.AsDouble()));
}
else if (ValueType.Single == xType || ValueType.Single == yType)
{
return(new SchFloat(x.AsFloat() + y.AsFloat()));
}
else if (ValueType.UInt64 == xType || ValueType.UInt64 == yType)
{
return(new SchUInt64(x.AsULong() + y.AsULong()));
}
else if (ValueType.Int64 == xType || ValueType.Int64 == yType)
{
return(new SchInt64(x.AsLong() + y.AsLong()));
}
else if (ValueType.UInt32 == xType || ValueType.UInt32 == yType)
{
return(new SchUInt(x.AsUInt() + y.AsUInt()));
}
return(new SchInt(x.AsInt() + y.AsInt()));
}
public static int Compare(SchNum x, SchNum y)
{
return(System.Math.Sign(x.AsDouble() - y.AsDouble()));
}