Re: Problem with phrase/3: help examples not working

Thanks for your reply, Carlo :). That works fine on version 6.6.0, but it
also fails on 6.2.6 as there is no string_codes/2. Would it be a good idea
to add a version number to predicates in help files, to know the version
when they were implemented?

In which way have double-quoted literals changed in version 7.x?

Cheers,
Fran.

----------------------------------------------------------------------------------------
*Francisco José Gallego Durán*
Dpto. de Ciencia de la Computación e Inteligencia Artificial // Universidad
de Alicante
(+34) 965903400 (Ext. 2073)
----------------------------------------------------------------------------------------


2014-02-12 13:04 GMT+01:00 Carlo Capelli <[email protected]>:

> Hi Fran
>
> integer//1 is defined in library(dcg/basics) and double quoted literals
> have changed a lot in latest versions (7.x).
>
> ?- use_module(library(dcg/basics)).
> %   library(pairs) compiled into pairs 0.00 sec, 22 clauses
> %  library(lists) compiled into lists 0.02 sec, 122 clauses
> % library(dcg/basics) compiled into dcg_basics 0.03 sec, 201 clauses
> true.
>
> ?- string_codes("123 ready", Cs),phrase(integer(N),Cs,P).
> Cs = [49, 50, 51, 32, 114, 101, 97, 100, 121],
> N = 123,
> P = [32, 114, 101, 97, 100, 121].
>
>
> 2014-02-12 12:50 GMT+01:00 Francisco José Gallego Durán <
> [email protected]>:
>
>> Hi everyone,
>>
>>    I am pretty new to this list, but I have been playing with prolog for
>> several years and using Swi-Prolog quite a lot. (I implemented a game
>> called PLMan<
>> http://plman.i3a.ua.es/downloads/category/1-game?download=1%3Aplman>that
>>
>> we use to teach logic and prolog programming to our students at the
>> University of Alicante).
>>
>>    I have a machine with Arch Linux and SWI 6.2.6 32bits multithreaded,
>> and
>> looked at help(phrase) to find this example:
>>
>> *    | ?- phrase(integer(X), "42 times", Rest).
>> |*
>> *    | X = 42
>> |*
>> *    ||Rest_=_[32,_116,_105,_109,_101,_115]____*
>>
>>
>>
>>    I copied it down to the interpreter and got this answer:
>>
>> *?- phrase(integer(X), "42 times", Rest).*
>> *ERROR: phrase/3: Undefined procedure: integer/3*
>> *ERROR:   However, there are definitions for:*
>> *ERROR:         integer/1*
>> *   Exception: (7) integer(_G550, [52, 50, 32, 116, 105, 109, 101, 115],
>> _G578) ? *
>>
>>
>>
>>    Did I do something wrong, or is it just an outdated-help case?
>>
>>    I take this opportunity to thank Jan for his work in creating and
>> maintaining SWI-Prolog. We have been using it for years and it has worked
>> flawlessly :).
>>
>> Cheers,
>> Fran.
>>
>>
>> ----------------------------------------------------------------------------------------
>> *Francisco José Gallego Durán*
>>
>> Dpto. de Ciencia de la Computación e Inteligencia Artificial //
>> Universidad
>> de Alicante
>> (+34) 965903400 (Ext. 2073)
>>
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