1/*  Part of XPCE --- The SWI-Prolog GUI toolkit
    2
    3    Author:        Jan Wielemaker and Anjo Anjewierden
    4    E-mail:        J.Wielemaker@vu.nl
    5    WWW:           http://www.swi-prolog.org/projects/xpce/
    6    Copyright (c)  1996-2012, University of Amsterdam
    7                              VU University Amsterdam
    8    All rights reserved.
    9
   10    Redistribution and use in source and binary forms, with or without
   11    modification, are permitted provided that the following conditions
   12    are met:
   13
   14    1. Redistributions of source code must retain the above copyright
   15       notice, this list of conditions and the following disclaimer.
   16
   17    2. Redistributions in binary form must reproduce the above copyright
   18       notice, this list of conditions and the following disclaimer in
   19       the documentation and/or other materials provided with the
   20       distribution.
   21
   22    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   23    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   24    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   25    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   26    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   27    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   28    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   29    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   30    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   31    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   32    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   33    POSSIBILITY OF SUCH DAMAGE.
   34*/
   35
   36:- module(pce_compatibility_layer,
   37          [ auto_call/1,
   38            callable_predicate/1,
   39            modified_since_last_loaded/1,
   40            pce_error/1,
   41            pce_warn/1,
   42            pce_info/1
   43          ]).

   52:- meta_predicate
   53    auto_call(0),
   54    callable_predicate(:).

 auto_call(:Goal)

Autoload Goal and call it. In SWI-Prolog, this simply means calling it.

   61auto_call(G) :-
   62    call(G).
   63
   64
   65                 /*******************************
   66                 *      DIALOG EDITOR SUPPORT   *
   67                 *******************************/

 callable_predicate(:Head) is semidet

Succeeds if Head can be called without raising an exception for an undefined predicate

   74callable_predicate(M:Head) :-
   75    callable(Head),
   76    functor(Head, Name, Arity),
   77    current_predicate(M:Name/Arity).

 modified_since_last_loaded(Path) is semidet

True is file has been modified since the last time it was loaded.

   83modified_since_last_loaded(File) :-
   84    '$time_source_file'(File, LoadTime, user),
   85    !,
   86    time_file(File, Modified),
   87    Modified > LoadTime.
   88modified_since_last_loaded(InFile) :-
   89    '$time_source_file'(File, LoadTime, user),
   90    same_file(InFile, File),
   91    !,
   92    time_file(File, Modified),
   93    Modified > LoadTime.
   94
   95
   96                 /*******************************
   97                 *           MESSAGES           *
   98                 *******************************/
   99
  100:- consult(library('english/pce_messages')).  101
  102:- multifile
  103    prolog:message/3.  104
  105prolog:message(Spec) -->
  106    pce_message(Spec).
  107prolog:message(context_error(Goal, Context, What)) -->
  108    [ '~w: ~w '-[Goal, What] ],
  109    pce_message_context(Context).
  110prolog:message(type_error(Goal, ArgN, Type, _Value)) -->
  111    [ '~w: argument ~w must be a ~w'-[Goal, ArgN, Type], nl ].

 pce_error(+Term) is det

 pce_warn(+Term) is det

 pce_info(+Term) is det

Portability layer wrappers around print_message/2.

  119pce_error(Term) :-
  120    (   current_prolog_flag(xref, true)
  121    ->  true
  122    ;   print_message(error, Term)
  123    ).
  124
  125pce_warn(Term) :-
  126    (   current_prolog_flag(xref, true)
  127    ->  true
  128    ;   print_message(warning, Term)
  129    ).
  130
  131pce_info(Term) :-
  132    print_message(informational, Term)