liveness_context.h

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/*******************************************************************\
 
 Module: analyses variable-sensitivity liveness_contextt
 
 Author: Jez Higgins
 
\*******************************************************************/
 
#ifndef CPROVER_ANALYSES_VARIABLE_SENSITIVITY_LIVENESS_CONTEXT_H
#define CPROVER_ANALYSES_VARIABLE_SENSITIVITY_LIVENESS_CONTEXT_H
 
#include <analyses/variable-sensitivity/write_location_context.h>
#include <iostream>
#include <stack>
 
class liveness_contextt : public write_location_contextt
{
public:
  explicit liveness_contextt(
    const abstract_object_pointert child,
    const typet &type)
    : write_location_contextt(child, type)
  {
  }
 
  liveness_contextt(
    const abstract_object_pointert child,
    const typet &type,
    bool top,
    bool bottom)
    : write_location_contextt(child, type, top, bottom)
  {
  }
 
  explicit liveness_contextt(
    const abstract_object_pointert child,
    const exprt &expr,
    const abstract_environmentt &environment,
    const namespacet &ns)
    : write_location_contextt(child, expr, environment, ns)
  {
  }
 
  abstract_object_pointert
  merge_location_context(const locationt &location) const override;
 
  void output(std::ostream &out, const class ai_baset &ai, const namespacet &ns)
    const override;
 
  locationt get_location() const;
 
protected:
  CLONE
 
  abstract_object_pointert merge(
    const abstract_object_pointert &other,
    const widen_modet &widen_mode) const override;
 
  abstract_object_pointert abstract_object_merge_internal(
    const abstract_object_pointert &other) const override;
 
  abstract_object_pointert write(
    abstract_environmentt &environment,
    const namespacet &ns,
    const std::stack<exprt> &stack,
    const exprt &specifier,
    const abstract_object_pointert &value,
    bool merging_write) const override;
 
private:
  using liveness_context_ptrt = std::shared_ptr<const liveness_contextt>;
 
  abstract_object_pointert
  reset_location_on_merge(const liveness_context_ptrt &merged) const;
 
  optionalt<locationt> assign_location;
 
  context_abstract_object_ptrt
  update_location_context_internal(const locationst &locations) const override;
 
  bool has_location() const;
 
  void set_location(const locationt &location);
};
 
#endif // CPROVER_ANALYSES_VARIABLE_SENSITIVITY_LIVENESS_CONTEXT_H