json-validator/include/jvalidate/constraint/visitor.h

#pragma once

#include <jvalidate/forward.h>

#define VISITOR_PURE_VIRTUAL(TYPE) virtual Status visit(TYPE const &) const = 0;

namespace jvalidate::constraint {
/**
 * @brief The base interface for visitors to be implemented off of.
 * Provides a visit function for every provided concrete type of Constraint,
 * as well as the ExtensionConstraint interface.
 */
struct ConstraintVisitor {
  virtual ~ConstraintVisitor() = default;
  CONSTRAINT_IMPLEMENTATION_LIST(VISITOR_PURE_VIRTUAL);
};

template <typename Cons> struct ExtensionConstraintVisitor {
  virtual Status visit(Cons const &) const = 0;
};
}

#undef VISITOR_PURE_VIRTUAL