/// <summary>
/// Find the product of the Somes.
/// For numeric values the behaviour is to multiply the Somes (lhs * rhs)
/// For Lst values the behaviour is to multiply all combinations of values in both lists
/// to produce a new list
/// Otherwise if the T type derives from IProductable then the behaviour
/// is to call lhs.Product(rhs);
/// </summary>
/// <param name="lhs">Left-hand side of the operation</param>
/// <param name="rhs">Right-hand side of the operation</param>
/// <returns>lhs * rhs</returns>
public Option <T> Product(Option <T> rhs)
{
if (IsNone)
{
return(this); // zero * rhs = zero
}
if (rhs.IsNone)
{
return(rhs); // lhs * zero = zero
}
return(Optional(TypeDesc.Product(Value, rhs.Value, TypeDesc <T> .Default)));
}
public Lst <T> Product(Lst <T> rhs) => (from x in this.AsEnumerable() from y in rhs.AsEnumerable() select TypeDesc.Product(x, y, TypeDesc <T> .Default)).Freeze();
public Set <T> Product(Set <T> rhs) =>
new Set <T>((from x in this.AsEnumerable()
from y in rhs.AsEnumerable()
select TypeDesc.Product(x, y, TypeDesc <T> .Default)).Distinct());