[J3] Syntax for enumeration

[Bill Long]

> On Oct 15, 2019, at 3:43 PM, Ondřej Čertík via J3 <j3 at mailman.j3-fortran.org> wrote:
> 
> 
> 
> On Tue, Oct 15, 2019, at 3:30 PM, Bill Long via J3 wrote:
>> 
>>> On Oct 15, 2019, at 2:50 PM, Ondřej Čertík via J3 <j3 at mailman.j3-fortran.org> wrote:
>>> 
>>>> 
>>>> 1)
>>>> 
>>>>   TYPE,ENUM :: my_enum
>>>>       a,b
>>>>       c
>>>>   END TYPE
>> 
>> 
>> 
>> I would prefer this form.  Simple and to the point.  Emphasizes that a 
>> TYPE is involved.  And it omits the ENUMERATOR keyword - typing this is 
>> tedious.  The lack of declarations for the enums signals that these are 
>> not components. 
> 
> I like omitting the ENUMERATOR keyword also. The argument against this is that every other statement in Fortran begins with a keyword. So there should be a keyword here also, unless we want to not make these a statement, which changes the syntax radically, something like:
> 
> TYPE, ENUM :: my_enum = {a, b, c}

I would avoid { } here - we should save these for the future.  But 

TYPE,ENUM :: nu_enum = ( <enum-name-list> ) 

would seem OK.  

Cheers,
Bill

> 
> But this syntax might have other issues, if we want to later extend it.
> 
> Ondrej

Bill Long                                                                       longb at cray.com
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