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yap-6.3/packages/gecode/disjunctor2.yap
2013-11-03 14:12:38 +00:00

38 lines
1.4 KiB
Prolog

%% -*- prolog -*-
%%=============================================================================
%% Copyright (C) 2011 by Denys Duchier
%%
%% This program is free software: you can redistribute it and/or modify it
%% under the terms of the GNU Lesser General Public License as published by the
%% Free Software Foundation, either version 3 of the License, or (at your
%% option) any later version.
%%
%% This program is distributed in the hope that it will be useful, but WITHOUT
%% ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
%% FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
%% more details.
%%
%% You should have received a copy of the GNU Lesser General Public License
%% along with this program. If not, see <http://www.gnu.org/licenses/>.
%%=============================================================================
:- use_module(library(gecode)).
disjunctor2(X_,Y_) :-
Space := space,
[X,Y] := intvars(Space,2,0,3),
D := disjunctor(Space),
C1 := clause(D),
[X1,Y1] := intvars(C1,2,0,3),
C1 += forward([X,Y],[X1,Y1]),
C1 += rel(X1,'IRT_EQ',0),
C1 += rel(Y1,'IRT_EQ',0),
C2 := clause(D),
[X2,Y2] := intvars(C2,2,0,3),
C2 += forward([X,Y],[X2,Y2]),
Z2 := intvar(C2,1,2),
C2 += linear([-1,1,1],[X2,Y2,Z2],'IRT_EQ',0),
Space += branch([X,Y],'INT_VAR_SIZE_MIN','INT_VAL_MIN'),
SolSpace := search(Space),
[X_,Y_] := val(SolSpace,[X,Y]).