SCIP Doxygen Documentation: cons

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 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 /*                                                                           */
 /*                  This file is part of the program and library             */
 /*         SCIP --- Solving Constraint Integer Programs                      */
 /*                                                                           */
 /*    Copyright (C) 2002-2014 Konrad-Zuse-Zentrum                            */
 /*                            fuer Informationstechnik Berlin                */
 /*                                                                           */
 /*  SCIP is distributed under the terms of the ZIB Academic License.         */
 /*                                                                           */
 /*  You should have received a copy of the ZIB Academic License              */
 /*  along with SCIP; see the file COPYING. If not email to scip@zib.de.      */
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 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /**@file   cons_sos2.h
  * @ingroup CONSHDLRS
  * @brief  constraint handler for SOS type 2 constraints
  * @author Marc Pfetsch
  *
  * A specially ordered set of type 2 (SOS2) is a sequence of variables such that at most two
  * variables are nonzero and if two variables are nonzero they must be adjacent in the specified
  * sequence. Note that it is in principle allowed that a variable appears twice, but it then can be
  * fixed to 0 if it is at least two apart in the sequence.
  */
 
 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
 
 #ifndef __SCIP_CONS_SOS2_H__
 #define __SCIP_CONS_SOS2_H__
 
 
 #include "scip/scip.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /** creates the handler for SOS2 constraints and includes it in SCIP */
 extern
 SCIP_RETCODE SCIPincludeConshdlrSOS2(
    SCIP*                 scip                /**< SCIP data structure */
    );
 
 /** creates and captures an SOS2 constraint
  *
  *  We set the constraint to not be modifable. If the weights are non
  *  NULL, the variables are ordered according to these weights (in
  *  ascending order).
  *
  *  @note the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
  */
 extern
 SCIP_RETCODE SCIPcreateConsSOS2(
    SCIP*                 scip,               /**< SCIP data structure */
    SCIP_CONS**           cons,               /**< pointer to hold the created constraint */
    const char*           name,               /**< name of constraint */
    int                   nvars,              /**< number of variables in the constraint */
    SCIP_VAR**            vars,               /**< array with variables of constraint entries */
    SCIP_Real*            weights,            /**< weights determining the variable order, or NULL if natural order should be used */
    SCIP_Bool             initial,            /**< should the LP relaxation of constraint be in the initial LP?
                                               *   Usually set to TRUE. Set to FALSE for 'lazy constraints'. */
    SCIP_Bool             separate,           /**< should the constraint be separated during LP processing?
                                               *   Usually set to TRUE. */
    SCIP_Bool             enforce,            /**< should the constraint be enforced during node processing?
                                               *   TRUE for model constraints, FALSE for additional, redundant constraints. */
    SCIP_Bool             check,              /**< should the constraint be checked for feasibility?
                                               *   TRUE for model constraints, FALSE for additional, redundant constraints. */
    SCIP_Bool             propagate,          /**< should the constraint be propagated during node processing?
                                               *   Usually set to TRUE. */
    SCIP_Bool             local,              /**< is constraint only valid locally?
                                               *   Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints. */
    SCIP_Bool             dynamic,            /**< is constraint subject to aging?
                                               *   Usually set to FALSE. Set to TRUE for own cuts which
                                               *   are separated as constraints. */
    SCIP_Bool             removable,          /**< should the relaxation be removed from the LP due to aging or cleanup?
                                               *   Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'. */
    SCIP_Bool             stickingatnode      /**< should the constraint always be kept at the node where it was added, even
                                               *   if it may be moved to a more global node?
                                               *   Usually set to FALSE. Set to TRUE to for constraints that represent node data. */
    );
 
 /** creates and captures a SOS2 constraint with all constraint flags set to their default values.
  *
  *  @warning Do NOT set the constraint to be modifiable manually, because this might lead
  *  to wrong results as the variable array will not be resorted
  *
  *  @note the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
  */
 extern
 SCIP_RETCODE SCIPcreateConsBasicSOS2(
    SCIP*                 scip,               /**< SCIP data structure */
    SCIP_CONS**           cons,               /**< pointer to hold the created constraint */
    const char*           name,               /**< name of constraint */
    int                   nvars,              /**< number of variables in the constraint */
    SCIP_VAR**            vars,               /**< array with variables of constraint entries */
    SCIP_Real*            weights             /**< weights determining the variable order, or NULL if natural order should be used */
    );
 
 /** adds variable to SOS2 constraint, the position is determined by the given weight */
 extern
 SCIP_RETCODE SCIPaddVarSOS2(
    SCIP*                 scip,               /**< SCIP data structure */
    SCIP_CONS*            cons,               /**< constraint */
    SCIP_VAR*             var,                /**< variable to add to the constraint */
    SCIP_Real             weight              /**< weight determining position of variable */
    );
 
 /** appends variable to SOS2 constraint */
 extern
 SCIP_RETCODE SCIPappendVarSOS2(
    SCIP*                 scip,               /**< SCIP data structure */
    SCIP_CONS*            cons,               /**< constraint */
    SCIP_VAR*             var                 /**< variable to add to the constraint */
    );
 
 /** gets number of variables in SOS2 constraint */
 extern
 int SCIPgetNVarsSOS2(
    SCIP*                 scip,               /**< SCIP data structure */
    SCIP_CONS*            cons                /**< constraint */
    );
 
 /** gets array of variables in SOS2 constraint */
 extern
 SCIP_VAR** SCIPgetVarsSOS2(
    SCIP*                 scip,               /**< SCIP data structure */
    SCIP_CONS*            cons                /**< constraint data */
    );
 
 /** gets array of weights in SOS2 constraint (or NULL if not existent) */
 extern
 SCIP_Real* SCIPgetWeightsSOS2(
    SCIP*                 scip,               /**< SCIP data structure */
    SCIP_CONS*            cons                /**< constraint data */
    );
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif