ValidateThenSet.h

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#ifndef fhiclcpp_types_detail_ValidateThenSet_h
#define fhiclcpp_types_detail_ValidateThenSet_h

#include "cetlib/exempt_ptr.h"
#include "fhiclcpp/ParameterSet.h"
#include "fhiclcpp/types/detail/ParameterBase.h"
#include "fhiclcpp/types/detail/ParameterWalker.h"

#include <set>
#include <string>
#include <vector>

namespace fhicl::detail {

  class ValidateThenSet
    : public ParameterWalker<tt::const_flavor::require_non_const> {
  public:
    ValidateThenSet(fhicl::ParameterSet const& pset,
                    std::set<std::string> const& keysToIgnore)
      : pset_{pset}
      , ignorableKeys_{keysToIgnore}
      , userKeys_{pset.get_all_keys()}
      , missingParameters_{}
    {
      cet::sort_all(userKeys_);
    }

    void check_keys();

  private:
    bool before_action(ParameterBase& p) override;
    void after_action(ParameterBase& p) override;
    void enter_sequence(SequenceBase& p) override;
    void delegated_parameter(DelegateBase&) override;

    void
    enter_table(TableBase&) override
    {}
    void
    atom(AtomBase&) override
    {}

    ParameterSet const& pset_;
    std::set<std::string> ignorableKeys_;
    std::vector<std::string> userKeys_;
    std::vector<cet::exempt_ptr<ParameterBase>> missingParameters_;
  };
}

#endif /* fhiclcpp_types_detail_ValidateThenSet_h */

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