format.hh

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#pragma once

#include <string>

#include <vcsn/misc/export.hh>

namespace vcsn LIBVCSN_API
{

  class format
  {
  public:
    using self_t = format;

    enum format_t
      {
        latex,
        raw,
        sname,
        text,
        utf8,
        deflt = text,
      };

    format(format_t f = deflt)
      : format_{f}
    {}

    format(const std::string& f);

    format for_labels() const
    {
      auto res = *this;
      res.label_ = true;
      return res;
    }

    format for_weights() const
    {
      auto res = *this;
      res.label_ = false;
      return res;
    }

    bool delimit() const
    {
      return delimit_;
    }

    format delimit(bool d) const
    {
      auto res = *this;
      res.delimit_ = d;
      return res;
    }

    const char* meta() const
    {
      return meta_;
    }

    format meta(const char* m) const
    {
      auto res = *this;
      res.meta_ = m;
      return res;
    }

    bool is_for_labels() const
    {
      return label_;
    }

    bool is_for_weights() const
    {
      return !label_;
    }

    format_t kind() const
    {
      return format_;
    }

    bool operator<(self_t that) const
    {
      return format_ < that.format_;
    }

    bool operator==(self_t that) const
    {
      return format_ == that.format_;
    }

    bool operator!=(self_t that) const
    {
      return !operator==(that);
    }

  private:
    format_t format_;
    bool label_ = false;
    bool delimit_ = false;
    const char* meta_ = nullptr;
  };

  std::string to_string(format i);

  std::istream& operator>>(std::istream& is, format& i);

  std::ostream& operator<<(std::ostream& os, format i);
} // namespace vcsn