help: type and packages

help: type and packages

[Ralf Tita]

Hi there,
I'm using ADA83 and have a problem with types in differnt packeges.
My first package looks like this:

package first is
    ...
    type HAND_T is (open,close);
    ...
end first;

the second package wich imports the first includes this type in a record:

with first;
use first;
package second is
    ...
    type TODO_T is record
            Hand : HAND_T;
            movement: : MOVE_T;
    end record;
    ...
end second;

-- no problem.
But when I want to use this record in a third packege wich only imports
the second package the compiler don't knows the component HAND_T
of the record.

with second;
use second;
package third is
    WhatToDo: TODO_T;
    ...
    WhatToDo.Hand:=open; -- here comes the compiler error
    ....
end third;

so does anybody knows where the mistake is ?
When you got an solution please send me a mail.

thanks a lot

Ralf Tita
natsulu@cs.tu-berlin.de

Re: help: type and packages

[David C. Hoos, Sr.]

Ralf Tita wrote in message <79g0gg$ppm$1@news.cs.tu-berlin.de>...
>Hi there,
>I'm using ADA83 and have a problem with types in differnt packeges.
>My first package looks like this:
>
>package first is
>    ...
>    type HAND_T is (open,close);
>    ...
>end first;
>
>the second package wich imports the first includes this type in a record:
>
>with first;
>use first;
>package second is
>    ...
>    type TODO_T is record
>            Hand : HAND_T;
>            movement: : MOVE_T;
>    end record;
>    ...
>end second;
>
>-- no problem.
>But when I want to use this record in a third packege wich only imports
>the second package the compiler don't knows the component HAND_T
>of the record.
>
>with second;
>use second;
>package third is
>    WhatToDo: TODO_T;
>    ...
>    WhatToDo.Hand:=open; -- here comes the compiler error
>    ....
>end third;
>
You need to say:
    WhatToDo.Hand:= First.open;

And, of course you need to add the context clause "with First;"
at the beginning of  package third.

A context clause "with some_unit", only includes that unit
into the context.


Hope this helps
David C. Hoos, Sr.