Re: GOTO considered necessary (reworked)

[Karel Th�nissen <thoenissen@hello.nl>]

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Karel Th�nissen wrote:

> A gizmo like this:
> 
> gizmo State : (one, two, three);
>    -- the state variable is private to the gizmo (like loop indices)
>    -- the state variable is read-only, but can change (like loop
> indices)
>    initialStuff;
>    transit one;
> state one;
>    blaBlaTalk;
>    transit ....;
> state two;
>    smallTalk; -- use State as a read-only variable like a loop index
>    transit ....;
> state three;
>    fileBusterTalk;
>    terminate; -- or something of that kind; needs more braincells spent
> end gizmo;

Oops, the name of the state variable and the proposed reserved word for
the state blocks are the same (except for Ada-irrelevant
capitalisation)...

It should read (also adding a type definition for the state variable to
avoid an 'anonymous' type):

type StateType is (one, two, three);

gizmo StateVariable : StateType;
   -- StateVariable is private to the gizmo (like loop indices)
   -- StateVariable is read-only, but can change (like loop indices)
   initialStuff;
   transit one; -- goto initial state
state one;
   ....;        -- blocks can query StateVariable
   transit ....;
state two;
   ....;        -- transits can be burried like returns
   transit ....;
state three;
   ....;
   terminate;   -- or something of that kind
end gizmo;


> Groeten, Karel