cegis_evaluator.h

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/*******************************************************************\
 
Module: Evaluate if an expression is consistent with examples
 
Author: Qinheping Hu
 
\*******************************************************************/

 
#ifndef CPROVER_GOTO_SYNTHESIZER_CEGIS_EVALUATOR_H
#define CPROVER_GOTO_SYNTHESIZER_CEGIS_EVALUATOR_H
 
#include "cegis_verifier.h"

class cegis_evaluatort
{
public:
  cegis_evaluatort(const exprt &expr, const std::vector<cext> &cexs)
    : checked_expr(expr), cexs(cexs)
  {
  }
 
  // Evaluate if the expression `checked_expr` is consistent with `cexs`.
  // Return true if `checked_expr` is consistent with all examples.
  bool evaluate();
 
protected:
  // Recursively evaluate boolean expressions on `cex`.
  // If `is_positive` is set, evaluate on the positive example in `cex`.
  // The positive example is the test collected from the first iteration of
  // loop---the loop_entry valuation.
  bool
  evaluate_rec_bool(const exprt &expr, const cext &cex, const bool is_positive);
 
  // Recursively evaluate integer expressions on `cex`.
  // If `is_positive` is set, evaluate on the positive example in `cex`.
  // The positive example is the test collected from the first iteration of
  // loop---the loop_entry valuation.
  mp_integer
  evaluate_rec_int(const exprt &expr, const cext &cex, const bool is_positive);

  const exprt &checked_expr;
  const std::vector<cext> &cexs;
};
 
#endif // CPROVER_GOTO_SYNTHESIZER_CEGIS_EVALUATOR_H