Variant records..

From: Ganesh Ramasivan (ganesh.ramasivan_at_gdcanada.com)
Date: 02/15/04

  • Next message: Cecilia Chew: "Question from newbie" 
    Date: 15 Feb 2004 14:51:30 -0800

    In the following example, how would i forbid the user of data type Foo
    from specifying the following:

    John : Foo(Vehicle => MAN, Power => AUTOMATIC);

    ie. is there a way to restrict the user from specifying certain types
    as variants?

    Thanks for your input.

    Ganesh

    Example:

    procedure Variant is

       type Vehicle_Type is (CAR, LEGS, BIKE, PLANE);
       type Vehicle_Power is (MANUAL, AUTOMATIC);

       type Foo(Vehicle : Vehicle_Type; Power: Vehicle_Power) is
        record
            case Vehicle is
                 when CAR =>
                null;
                 when LEGS =>
                null;
                 when BIKE =>
                null;
                 when PLANE =>
                null;
             when others =>
                null;
            end case;
        end record;

        Audi : Foo(Vehicle => CAR, Power => MANUAL);
    begin
     null;
    end Variant;

  • Next message: Cecilia Chew: "Question from newbie"

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