Fwd: meta predicate call

BProlog
Last login: Thu Aug 29 14:48:48 on ttys000
/Users/joseffrydl/BProlog/bp ; exit;
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Macintosh:~ joseffrydl$ /Users/joseffrydl/BProlog/bp ; exit;
B-Prolog Version 7.8#5, All rights reserved, (C) Afany Software 1994-2013.

Type 'help' for usage.
| ?- F =..[is_list,[1,2,3]],call(F).
F = is_list([1,2,3])
yes
| ?- 


Begin forwarded message:

> From: Josef Frydl <[email protected]>
> Date: August 29, 2013 2:50:49 PM EDT
> To: [email protected]
> Subject: meta predicate call
> 
> Please help see this
> 
> % /Users/joseffrydl/.plrc compiled 0.00 sec, 1 clauses
> Welcome to SWI-Prolog (Multi-threaded, 32 bits, Version 6.3.17)
> Copyright (c) 1990-2013 University of Amsterdam, VU Amsterdam
> SWI-Prolog comes with ABSOLUTELY NO WARRANTY. This is free software,
> and you are welcome to redistribute it under certain conditions.
> Please visit http://www.swi-prolog.org for details.
> 
> For help, use ?- help(Topic). or ?- apropos(Word).
> 
> ?- F =..[is_list,[1,2,3]],call(F).
> F = is_list([1, 2, 3]).
> 
> ?- 
> why  F is not executed
> 
> Thanks Josef Frydl

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