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+/* $Id: CbcFeasibilityBase.hpp 1573 2011-01-05 01:12:36Z lou $ */
+// Copyright (C) 2005, International Business Machines
+// Corporation and others. All Rights Reserved.
+// This code is licensed under the terms of the Eclipse Public License (EPL).
+
+#ifndef CbcFeasibilityBase_H
+#define CbcFeasibilityBase_H
+
+
+//#############################################################################
+/* There are cases where the user wants to control how CBC sees the problems feasibility.
+ The user may want to examine the problem and say :
+ a) The default looks OK
+ b) Pretend this problem is Integer feasible
+ c) Pretend this problem is infeasible even though it looks feasible
+
+ This simple class allows user to do that.
+
+*/
+
+class CbcModel;
+class CbcFeasibilityBase {
+public:
+ // Default Constructor
+ CbcFeasibilityBase () {}
+
+ /**
+ On input mode:
+ 0 - called after a solve but before any cuts
+ -1 - called after strong branching
+ Returns :
+ 0 - no opinion
+ -1 pretend infeasible
+ 1 pretend integer solution
+ */
+ virtual int feasible(CbcModel * , int ) {
+ return 0;
+ }
+
+ virtual ~CbcFeasibilityBase() {}
+
+ // Copy constructor
+ CbcFeasibilityBase ( const CbcFeasibilityBase & ) {}
+
+ // Assignment operator
+ CbcFeasibilityBase & operator=( const CbcFeasibilityBase& ) {
+ return *this;
+ }
+
+ /// Clone
+ virtual CbcFeasibilityBase * clone() const {
+ return new CbcFeasibilityBase(*this);
+ }
+};
+#endif
+