[m-dev.] proposal: extension to pragma obsolete

[Julien Fischer]

On Tue, 9 Sep 2014, Peter Wang wrote:

> On Tue, 9 Sep 2014 17:18:16 +1000 (EST), Julien Fischer <jfischer at opturion.com> wrote:
>>
>> The main question I have is what should the second argument actually be.  There
>> are three proposals below: (1) use a string literal, (2) use a list of string
>> literals or (3) make (some of) the functionality of the error_util library
>> available so we can mark up the warning messages.
>>
>>      (1) :- pragma obsolete(bar.baz/2, "Use predicate `bar.baz_to_int'/2 instead.").
>>      (2) :- pragma obsolete(bar.baz/2, ["Use predicate",
>>           "`bar.baz_to_int'/2 instead"]).
>>      (3) :- pragma obsolete(bar.baz/2, [words("Use predicate"), sym_name_and_arity("bar.baz_to_int", 2),
>>         words("instead.")]).
>
> I think it's unnecessary, as a comment on the predicate declaration is
> fine.

Experience would suggest that's the one place people never look ... ;-)

Cheers,
Julien.