message: std_str from ParsingCaret::Label
diff: @@ -76,6 +76,14 @@ public:
  return toString(true);
  }
  + std::string std_str(){
  + v_int32 end = m_end;
  + if(end == -1){
  + end = m_caret.m_pos;
  + }
  + return std::string((const char*) (&m_caret.m_data[m_start]), end - m_start);
  + }
  +
  };
  private:
  p_char8 m_data;
  