#pragma once

#include "indexer/feature.hpp"

#include "std/string.hpp"
#include "std/unique_ptr.hpp"
#include "std/vector.hpp"

namespace drule
{

// Runtime feature style selector absract interface.
class ISelector
{
public:
  virtual ~ISelector() = default;

  // If ISelector.Test returns true then style is applicable for the feature,
  // otherwise, if ISelector.Test returns false, style cannot be applied to the feature.
  virtual bool Test(FeatureType const & ft) const = 0;
};

// Factory method which builds ISelector from a string.
unique_ptr<ISelector> ParseSelector(string const & str);

// Factory method which builds composite ISelector from a set of string.
unique_ptr<ISelector> ParseSelector(vector<string> const & strs);

}  // namespace drule