basic_regex.hpp

C++的一个好库。。。现在很流行

   basic_regex& BOOST_REGEX_CALL operator=(const std::basic_string<charT>& p)
   {
      return assign(p.data(), p.data() + p.size(), regex_constants::normal);
   }

   basic_regex& BOOST_REGEX_CALL assign(
       const std::basic_string<charT>& s,
       flag_type f = regex_constants::normal)
   {
      return assign(s.data(), s.data() + s.size(), f);
   }

#endif

   //
   // locale:
   locale_type BOOST_REGEX_CALL imbue(locale_type l);
   locale_type BOOST_REGEX_CALL getloc()const
   { 
      return m_pimpl.get() ? m_pimpl->getloc() : locale_type(); 
   }
   //
   // getflags:
   // retained for backwards compatibility only, "flags"
   // is now the prefered name:
   flag_type BOOST_REGEX_CALL getflags()const
   { 
      return flags();
   }
   flag_type BOOST_REGEX_CALL flags()const
   { 
      return m_pimpl.get() ? m_pimpl->flags() : 0;
   }
   //
   // str:
   std::basic_string<charT> BOOST_REGEX_CALL str()const
   {
      return m_pimpl.get() ? m_pimpl->str() : std::basic_string<charT>();
   }
   //
   // begin, end:
   const_iterator BOOST_REGEX_CALL begin()const
   { 
      return (m_pimpl.get() ? m_pimpl->begin() : 0); 
   }
   const_iterator BOOST_REGEX_CALL end()const
   { 
      return (m_pimpl.get() ? m_pimpl->end() : 0); 
   }
   //
   // swap:
   void BOOST_REGEX_CALL swap(basic_regex& that)throw()
   {
      m_pimpl.swap(that.m_pimpl);
   }
   //
   // size:
   size_type BOOST_REGEX_CALL size()const
   { 
      return (m_pimpl.get() ? m_pimpl->size() : 0); 
   }
   //
   // max_size:
   size_type BOOST_REGEX_CALL max_size()const
   { 
      return UINT_MAX; 
   }
   //
   // empty:
   bool BOOST_REGEX_CALL empty()const
   { 
      return (m_pimpl.get() ? 0 != m_pimpl->status() : true); 
   }

   size_type BOOST_REGEX_CALL mark_count()const 
   { 
      return (m_pimpl.get() ? m_pimpl->mark_count() : 0); 
   }

   int status()const
   {
      return (m_pimpl.get() ? m_pimpl->status() : regex_constants::error_empty);
   }

   int BOOST_REGEX_CALL compare(const basic_regex& that) const
   {
      if(m_pimpl.get() == that.m_pimpl.get())
         return 0;
      if(!m_pimpl.get())
         return -1;
      if(!that.m_pimpl.get())
         return 1;
      if(status() != that.status())
         return status() - that.status();
      if(flags() != that.flags())
         return flags() - that.flags();
      return str().compare(that.str());
   }
   bool BOOST_REGEX_CALL operator==(const basic_regex& e)const
   { 
      return compare(e) == 0; 
   }
   bool BOOST_REGEX_CALL operator != (const basic_regex& e)const
   { 
      return compare(e) != 0; 
   }
   bool BOOST_REGEX_CALL operator<(const basic_regex& e)const
   { 
      return compare(e) < 0; 
   }
   bool BOOST_REGEX_CALL operator>(const basic_regex& e)const
   { 
      return compare(e) > 0; 
   }
   bool BOOST_REGEX_CALL operator<=(const basic_regex& e)const
   { 
      return compare(e) <= 0; 
   }
   bool BOOST_REGEX_CALL operator>=(const basic_regex& e)const
   { 
      return compare(e) >= 0; 
   }

   //
   // The following are deprecated as public interfaces
   // but are available for compatibility with earlier versions.
   const charT* BOOST_REGEX_CALL expression()const 
   { 
      return (m_pimpl.get() && !m_pimpl->status() ? m_pimpl->expression() : 0); 
   }
   unsigned int BOOST_REGEX_CALL set_expression(const charT* p1, const charT* p2, flag_type f = regex_constants::normal)
   {
      assign(p1, p2, f | regex_constants::no_except);
      return status();
   }
   unsigned int BOOST_REGEX_CALL set_expression(const charT* p, flag_type f = regex_constants::normal) 
   { 
      assign(p, f | regex_constants::no_except); 
      return status();
   }
   unsigned int BOOST_REGEX_CALL error_code()const
   {
      return status();
   }
   //
   // private access methods:
   //
   const re_detail::re_syntax_base* get_first_state()const
   {
      BOOST_ASSERT(0 != m_pimpl.get());
      return m_pimpl->get_first_state();
   }
   unsigned get_restart_type()const
   {
      BOOST_ASSERT(0 != m_pimpl.get());
      return m_pimpl->get_restart_type();
   }
   const unsigned char* get_map()const
   {
      BOOST_ASSERT(0 != m_pimpl.get());
      return m_pimpl->get_map();
   }
   const ::boost::regex_traits_wrapper<traits>& get_traits()const
   {
      BOOST_ASSERT(0 != m_pimpl.get());
      return m_pimpl->get_traits();
   }
   bool can_be_null()const
   {
      BOOST_ASSERT(0 != m_pimpl.get());
      return m_pimpl->can_be_null();
   }
   const re_detail::regex_data<charT, traits>& get_data()const
   {
      BOOST_ASSERT(0 != m_pimpl.get());
      return m_pimpl->get_data();
   }

private:
   shared_ptr<re_detail::basic_regex_implementation<charT, traits> > m_pimpl;
};

//
// out of line members;
// these are the only members that mutate the basic_regex object,
// and are designed to provide the strong exception guarentee
// (in the event of a throw, the state of the object remains unchanged).
//
template <class charT, class traits>
basic_regex<charT, traits>& basic_regex<charT, traits>::do_assign(const charT* p1,
                        const charT* p2,
                        flag_type f)
{
   shared_ptr<re_detail::basic_regex_implementation<charT, traits> > temp;
   if(!m_pimpl.get())
   {
      temp = shared_ptr<re_detail::basic_regex_implementation<charT, traits> >(new re_detail::basic_regex_implementation<charT, traits>());
   }
   else
   {
      temp = shared_ptr<re_detail::basic_regex_implementation<charT, traits> >(new re_detail::basic_regex_implementation<charT, traits>(m_pimpl->m_ptraits));
   }
   temp->assign(p1, p2, f);
   temp.swap(m_pimpl);
   return *this;
}

template <class charT, class traits>
typename basic_regex<charT, traits>::locale_type BOOST_REGEX_CALL basic_regex<charT, traits>::imbue(locale_type l)
{ 
   shared_ptr<re_detail::basic_regex_implementation<charT, traits> > temp(new re_detail::basic_regex_implementation<charT, traits>());
   locale_type result = temp->imbue(l);
   temp.swap(m_pimpl);
   return result;
}

//
// non-members:
//
template <class charT, class traits>
void swap(basic_regex<charT, traits>& e1, basic_regex<charT, traits>& e2)
{
   e1.swap(e2);
}

#ifndef BOOST_NO_STD_LOCALE
template <class charT, class traits, class traits2>
std::basic_ostream<charT, traits>& 
   operator << (std::basic_ostream<charT, traits>& os, 
                const basic_regex<charT, traits2>& e)
{
   return (os << e.str());
}
#else
template <class traits>
std::ostream& operator << (std::ostream& os, const basic_regex<char, traits>& e)
{
   return (os << e.str());
}
#endif

//
// class reg_expression:
// this is provided for backwards compatibility only,
// it is deprecated, no not use!
//
#ifdef BOOST_REGEX_NO_FWD
template <class charT, class traits = regex_traits<charT> >
#else
template <class charT, class traits >
#endif
class reg_expression : public basic_regex<charT, traits>
{
public:
   typedef typename basic_regex<charT, traits>::flag_type flag_type;
   typedef typename basic_regex<charT, traits>::size_type size_type;
   explicit reg_expression(){}
   explicit reg_expression(const charT* p, flag_type f = regex_constants::normal)
      : basic_regex<charT, traits>(p, f){}
   reg_expression(const charT* p1, const charT* p2, flag_type f = regex_constants::normal)
      : basic_regex<charT, traits>(p1, p2, f){}
   reg_expression(const charT* p, size_type len, flag_type f)
      : basic_regex<charT, traits>(p, len, f){}
   reg_expression(const reg_expression& that)
      : basic_regex<charT, traits>(that) {}
   ~reg_expression(){}
   reg_expression& BOOST_REGEX_CALL operator=(const reg_expression& that)
   {
      return this->assign(that);
   }

#if !defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(__IBMCPP__)
   template <class ST, class SA>
   explicit reg_expression(const std::basic_string<charT, ST, SA>& p, flag_type f = regex_constants::normal)
   : basic_regex<charT, traits>(p, f)
   { 
   }

   template <class InputIterator>
   reg_expression(InputIterator arg_first, InputIterator arg_last, flag_type f = regex_constants::normal)
   : basic_regex<charT, traits>(arg_first, arg_last, f)
   {
   }

   template <class ST, class SA>
   reg_expression& BOOST_REGEX_CALL operator=(const std::basic_string<charT, ST, SA>& p)
   {
      this->assign(p);
      return *this;
   }
#else
   explicit reg_expression(const std::basic_string<charT>& p, flag_type f = regex_constants::normal)
   : basic_regex<charT, traits>(p, f)
   { 
   }

   reg_expression& BOOST_REGEX_CALL operator=(const std::basic_string<charT>& p)
   {
      this->assign(p);
      return *this;
   }
#endif

};

#ifdef BOOST_MSVC
#pragma warning (pop)
#endif

} // namespace boost

#ifdef BOOST_HAS_ABI_HEADERS
#  include BOOST_ABI_SUFFIX
#endif

#endif