NAME

Algorithm::SAT::Backtracking::Ordered - A simple Backtracking SAT ordered implementation

SYNOPSIS

            

              
              
# You can use it with Algorithm::SAT::Expression
use Algorithm::SAT::Expression;
my $expr = Algorithm::SAT::Expression->new->with("Algorithm::SAT::Backtracking::Ordered");
$expr->or( '-foo@2.1', 'bar@2.2' );
$expr->or( '-foo@2.3', 'bar@2.2' );
$expr->or( '-baz@2.3', 'bar@2.3' );
$expr->or( '-baz@1.2', 'bar@2.2' );
my $model = $exp->solve();
# Or you can use it directly:
use Algorithm::SAT::Backtracking::Ordered;
my $solver = Algorithm::SAT::Backtracking::Ordered->new;
my $variables = [ 'blue', 'green', 'yellow', 'pink', 'purple' ];
my $clauses = [
    [ 'blue',  'green',  '-yellow' ],
    [ '-blue', '-green', 'yellow' ],
    [ 'pink', 'purple', 'green', 'blue', '-yellow' ]
];
my $model = $solver->solve( $variables, $clauses );
            
          

DESCRIPTION

Algorithm::SAT::Backtracking::Ordered is a pure Perl implementation of a simple SAT Backtracking solver, in this variant of Algorithm::SAT::Backtracking we keep the order of the model updates and return a Hash::Ordered as result.

Look at Algorithm::SAT::Backtracking for a theory description.

Look also at the test file for an example of usage.

Algorithm::SAT::Expression use this module to solve Boolean expressions.

METHODS

Inherits all the methods from Algorithm::SAT::Backtracking::DPLL and override/implements the following:

SOLVE

            

              
              
$expr->solve();
            
          

in this case returns a Hash::Ordered.

LICENSE

Copyright (C) mudler.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

AUTHOR

mudler <mudler@dark-lab.net>

SEE ALSO

Algorithm::SAT::Expression, Algorithm::SAT::Backtracking::DPLL, Algorithm::SAT::Backtracking, Algorithm::SAT::Backtracking::Ordered::DPLL