125 lines
2.7 KiB
Perl
125 lines
2.7 KiB
Perl
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% clp(q,r) version 1.3.3 %
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% %
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% (c) Copyright 1992,1993,1994,1995 %
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% Austrian Research Institute for Artificial Intelligence (OFAI) %
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% Schottengasse 3 %
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% A-1010 Vienna, Austria %
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% %
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% File: geler.pl %
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% Author: Christian Holzbaur christian@ai.univie.ac.at %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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:- module( geler_r,
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[
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geler/2,
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project_nonlin/3,
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collect_nonlin/3
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]).
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:- use_module( library(atts)).
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:- attribute goals/1, all_nonlin/1.
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attribute_goal( X, Goals) :-
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get_atts( X, goals(Gs)),
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nonexhausted( Gs, Goals, []),
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Goals = [_|_].
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attribute_goal( X, Conj) :-
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get_atts( X, all_nonlin(Goals)),
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l2conj( Goals, Conj).
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l2conj( [X|Xs], Conj) :-
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( Xs = [], Conj = X
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; Xs = [_|_], Conj = (X,Xc), l2conj( Xs, Xc)
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).
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nonexhausted( run(Mutex,G)) -->
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( {
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var(Mutex)
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} ->
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[ G ]
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;
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[]
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).
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nonexhausted( (A,B)) -->
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nonexhausted( A),
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nonexhausted( B).
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verify_attributes( X, Y, Later) :-
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get_atts( X, goals(Gx)),
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!,
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( var(Y),
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( get_atts( Y, goals(Gy)) ->
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Later = [Gx,Gy],
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put_atts( Y, -goals(_))
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;
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Later = [],
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put_atts( Y, goals(Gx))
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)
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; nonvar( Y),
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Later = [Gx]
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).
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verify_attributes( _, _, []).
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/*
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project_attributes( _, Cvas) :-
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collect_nonlin( Cvas, L, []),
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sort( L, Ls),
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put_atts( _, all_nonlin(Ls)).
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*/
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%
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% called from project.pl
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%
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project_nonlin( _, Cvas, Reachable) :-
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collect_nonlin( Cvas, L, []),
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sort( L, Ls),
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prolog:term_variables( Ls, Reachable),
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put_atts( _, all_nonlin(Ls)).
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collect_nonlin( []) --> [].
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collect_nonlin( [X|Xs]) -->
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( {get_atts( X, goals(Gx))} ->
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trans( Gx),
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collect_nonlin( Xs)
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;
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collect_nonlin( Xs)
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).
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trans( (A,B)) -->
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trans( A),
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trans( B).
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trans( run(Mutex,Gs)) -->
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( {var(Mutex)} ->
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{Mutex = done},
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transg( Gs)
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;
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[]
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).
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transg( (A,B)) --> !,
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transg( A),
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transg( B).
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transg( M:G) --> !,
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M:transg( G).
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transg( G) --> [ G ].
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run( Mutex, _) :- nonvar(Mutex).
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run( Mutex, G) :- var(Mutex), Mutex=done, call( G).
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:- meta_predicate geler(+,:).
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%
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geler( Vars, Goal) :-
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attach( Vars, run(_Mutex,Goal)).
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attach( [], _).
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attach( [V|Vs], Goal) :-
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( var(V), get_atts( V, goals(Gv)) ->
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put_atts( V, goals((Goal,Gv)))
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;
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put_atts( V, goals(Goal))
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),
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attach( Vs, Goal).
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