#ifndef __EVALUATORS_BACKTRACKER_H
#define __EVALUATORS_BACKTRACKER_H

namespace Evaluators {

void Backtracker_set_stack_beginning(long* value);
void Backtracker_restore_context(void);
int Backtracker_save_context(void);

#define FAIL Backtracker_restore_context()
#define TRY(i) if (!Backtracker_save_context()) { return i; }

};

#endif /* ndef __EVALUATORS_BACKTRACKER_H */