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

#pragma once

#include <variant>

#include <jvalidate/constraint/visitor.h>
#include <jvalidate/detail/pointer.h>
#include <jvalidate/enum.h>
#include <jvalidate/forward.h>
#include <jvalidate/status.h>

namespace jvalidate::constraint {
class Constraint {
public:
  using SubConstraint = std::variant<schema::Node const *, std::unique_ptr<Constraint>>;

public:
  virtual ~Constraint() = default;
  virtual Status accept(ConstraintVisitor const & visitor) const = 0;
};

template <typename CRTP> class SimpleConstraint : public Constraint {
public:
  Status accept(ConstraintVisitor const & visitor) const final {
    return visitor.visit(*static_cast<CRTP const *>(this));
  }
};

class ExtensionConstraint : public Constraint {
public:
  Status accept(ConstraintVisitor const & visitor) const final { return visitor.visit(*this); }

  virtual Status validate(adapter::Adapter const & json, detail::Pointer const & where,
                          ValidationResult * result) const = 0;
};
}