new types

new types

[Bob McChesney]

Could anyone please help me? I'm trying to make a new type of an access
type. Is that possible?

eg.
you know you can do:
    type BobType is new Integer

but can you do:
    type BobType is new Set_Class.Set
where Set is:
    type Set access Set_Header
?????

I've tried to do this and I get the error 'invalid prefix in selected
component "Set_Class" '

I don't know if it matters but Set_Class is generic.

Thanks,
Bob McChesney

Re: new types

[Larry Hazel]

Bob McChesney wrote:
> 
> Could anyone please help me? I'm trying to make a new type of an access
> type. Is that possible?
> 
> eg.
> you know you can do:
>     type BobType is new Integer
> 
> but can you do:
>     type BobType is new Set_Class.Set
> where Set is:
>     type Set access Set_Header
> ?????
> 
> I've tried to do this and I get the error 'invalid prefix in selected
> component "Set_Class" '
> 
> I don't know if it matters but Set_Class is generic.
> 
> Thanks,
> Bob McChesney

Set_Class.Set doesn't exist if Set_Class is generic.  A new type Set is created
for each instantiation of Set_Class.

Larry

Re: new types

[Ted Dennison]

In article <3AF76ADC.1E8E5771@mindspring.com>, Larry Hazel says...
>
>Bob McChesney wrote:
>> 
>> but can you do:
>>     type BobType is new Set_Class.Set
>> where Set is:
>>     type Set access Set_Header
>> ?????
>> 
>> I've tried to do this and I get the error 'invalid prefix in selected
>> component "Set_Class" '
>> 
>> I don't know if it matters but Set_Class is generic.
>Set_Class.Set doesn't exist if Set_Class is generic.  A new type Set is created
>for each instantiation of Set_Class.

Right. In other words, you'll have to instantiate the generic first:

package My_Set is new Set_Class;

Then use the *instantiation* name in your type.

type Bobtype is new My_Set.Set;

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          home email - mailto:dennison@telepath.com

Re: new types

[Bob McChesney]

Thanks very much,

I haven't used generic sets before now, and didn't know what I was doing. I
think I understand now though.

Thanks,

Bob McChesney