list_filter.h

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#ifndef META_LIST_FILTER_H_
#define META_LIST_FILTER_H_

#include <memory>
#include <unordered_set>

#include "analyzers/filter_factory.h"
#include "util/clonable.h"
#include "util/optional.h"

namespace cpptoml
{
class table;
}

namespace meta
{
namespace analyzers
{
namespace filters
{

class list_filter : public util::clonable<token_stream, list_filter>
{
  public:
    enum class type
    {
        ACCEPT,
        REJECT
    };

    list_filter(std::unique_ptr<token_stream> source,
                const std::string& filename, type method = type::REJECT);

    list_filter(const list_filter& other);

    void set_content(const std::string& content) override;

    std::string next() override;

    operator bool() const override;

    const static std::string id;

  private:
    void next_token();

    std::unique_ptr<token_stream> source_;

    util::optional<std::string> token_;

    std::unordered_set<std::string> list_;

    type method_;
};

template <>
std::unique_ptr<token_stream>
    make_filter<list_filter>(std::unique_ptr<token_stream>,
                             const cpptoml::table&);
}
}
}
#endif