level.hpp

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#ifndef _level_hpp_INCLUDED
#define _level_hpp_INCLUDED
 
#include "global.h"
 
#include <climits>
 
ABC_NAMESPACE_CXX_HEADER_START
 
namespace CaDiCaL {
 
// For each new decision we increase the decision level and push a 'Level'
// on the 'control' stack.  The information gathered here is used in
// 'reuse_trail' and for early aborts in clause minimization.
 
struct Level {
 
  int decision; // decision literal of this level
  int trail;    // trail start of this level
 
  struct {
    int count; // how many variables seen during 'analyze'
    int trail; // smallest trail position seen on this level
  } seen;
 
  void reset () {
    seen.count = 0;
    seen.trail = INT_MAX;
  }
 
  Level (int d, int t) : decision (d), trail (t) { reset (); }
  Level () {}
};
 
} // namespace CaDiCaL
 
ABC_NAMESPACE_CXX_HEADER_END
 
#endif