parser.h

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#ifndef META_PARSER_H_
#define META_PARSER_H_

#include <array>
#include <memory>
#include <string>
#include "util/optional.h"

namespace meta
{
namespace io
{

class mmap_file;

class parser
{
  public:
    enum class input_type
    {
        File,
        String
    };

    parser(const std::string& input, const std::string& delims,
           input_type in_type = input_type::File);

    ~parser();

    parser(parser&&);

    parser& operator=(parser&&);

    std::string filename() const;

    std::string peek() const;

    std::string next();

    bool has_next() const;

  private:
    void get_next();

    size_t idx_;

    std::array<bool, 256> invalid_;

    std::string filename_;

    std::unique_ptr<io::mmap_file> mmap_file_;

    uint64_t size_;

    const char* data_;

    util::optional<std::string> next_;
};
}
}

#endif