LexerTextStream.h

#include <QString>
 
class QIODevice;
 
namespace knowCore
{
  class LexerTextStream
  {
  public:
    LexerTextStream();
    LexerTextStream(QIODevice* sstream);
    LexerTextStream(const QString& string);
    ~LexerTextStream();
    void setDevice(QIODevice* sstream);
    void setString(const QString& string);
    struct Element
    {
      QString content;
      int line;
      int column;
      bool eof;
      bool operator==(char c) const { return content.size() == 1 and content[0] == c; }
      bool operator!=(char c) const { return not(*this == c); }
#define KNOWCORE_CORE_LEXERBASE_CHAR_F(_F_)                                                        \
  bool _F_() const { return content.size() == 1 and content[0]._F_(); }
      KNOWCORE_CORE_LEXERBASE_CHAR_F(isSpace)
      KNOWCORE_CORE_LEXERBASE_CHAR_F(isLetter)
      KNOWCORE_CORE_LEXERBASE_CHAR_F(isDigit)
      bool isLetterOrDigit() const
      {
        return content.size() == 1 and (content[0].isLetter() or content[0].isDigit());
      }
    };
    Element getNextChar();
    Element getNextNonSeparatorChar();
    void unget(Element c);
    std::tuple<Element, bool> getString(const QString& terminator);
    std::tuple<Element, bool> getDigit(Element start);
    bool eof() const;
    void setBufferSize(std::size_t _size);
    std::size_t bufferSize();
    std::size_t currentBufferSize();
  private:
    struct Private;
    Private* const d;
  };
} // namespace knowCore