/// <summary> /// Subtract the Some(x) of one option from the Some(y) of another. If either of the /// options are None then the result is None /// For numeric values the behaviour is to find the difference between the Somes (lhs - rhs) /// For Lst values the behaviour is to remove items in the rhs from the lhs /// For Map or Set values the behaviour is to remove items in the rhs from the lhs /// Otherwise if the R type derives from ISubtractable then the behaviour /// is to call lhs.Subtract(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 static Option <T> subtract <T>(Option <T> lhs, Option <T> rhs) => lhs.Subtract(rhs);
public static Option <T> subtract <NUM, T>(Option <T> lhs, Option <T> rhs) where NUM : struct, Num <T> => lhs.Subtract <NUM, T>(rhs);
