basic_regex.hpp

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/*
 *
 * Copyright (c) 1998-2002
 * Dr John Maddock
 *
 * Use, modification and distribution are subject to the 
 * Boost Software License, Version 1.0. (See accompanying file 
 * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 *
 */

 /*
  *   LOCATION:    see http://www.boost.org for most recent version.
  *   FILE         basic_regex.cpp
  *   VERSION      see <boost/version.hpp>
  *   DESCRIPTION: Declares template class basic_regex (note that member function
  *                bodies are in regex_compile.hpp).
  */

#ifndef BOOST_REGEX_V4_BASIC_REGEX_HPP
#define BOOST_REGEX_V4_BASIC_REGEX_HPP

#ifdef BOOST_HAS_ABI_HEADERS
#  include BOOST_ABI_PREFIX
#endif

namespace boost{
//
// class reg_expression
// represents the compiled
// regular expression:
//

#ifdef BOOST_MSVC
#pragma warning(push)
#pragma warning(disable : 4251 4231 4660)
#endif

#ifdef BOOST_REGEX_NO_FWD
template <class charT, class traits = regex_traits<charT>, class Allocator = BOOST_DEFAULT_ALLOCATOR(charT) >
#else
template <class charT, class traits, class Allocator >
#endif
class reg_expression : public regbase
{
public:
   // typedefs:
   typedef typename traits::size_type            traits_size_type;
   typedef typename traits::uchar_type           traits_uchar_type;
   typedef typename traits::string_type          traits_string_type;
   typedef charT                                 char_type;
   typedef traits                                traits_type;

   typedef charT                                 value_type;
   typedef charT&                                reference;
   typedef const charT&                          const_reference;
   typedef const charT*                          const_iterator;
   typedef const_iterator                        iterator;
   typedef typename Allocator::difference_type   difference_type;
   typedef typename Allocator::size_type         size_type;   
   typedef Allocator                             allocator_type;
   typedef Allocator                             alloc_type;
   typedef regex_constants::syntax_option_type   flag_type;
   // locale_type
   // placeholder for actual locale type used by the
   // traits class to localise *this.
   typedef typename traits::locale_type          locale_type;
   
public:
   explicit reg_expression(const Allocator& a = Allocator());
   explicit reg_expression(const charT* p, flag_type f = regex_constants::normal, const Allocator& a = Allocator());
   reg_expression(const charT* p1, const charT* p2, flag_type f = regex_constants::normal, const Allocator& a = Allocator());
   reg_expression(const charT* p, size_type len, flag_type f, const Allocator& a = Allocator());
   reg_expression(const reg_expression&);
   ~reg_expression();
   reg_expression& BOOST_REGEX_CALL operator=(const reg_expression&);
   reg_expression& BOOST_REGEX_CALL operator=(const charT* ptr)
   {
      set_expression(ptr, regex_constants::normal | regex_constants::use_except);
      return *this;
   }

   //
   // assign:
   reg_expression& assign(const reg_expression& that)
   { return *this = that; }
   reg_expression& assign(const charT* ptr, flag_type f = regex_constants::normal)
   {
      set_expression(ptr, f | regex_constants::use_except);
      return *this;
   }
   reg_expression& assign(const charT* ptr, size_type len, flag_type f)
   {
      std::basic_string<charT> s(ptr, len);
      set_expression(s.c_str(), f | regex_constants::use_except);
      return *this;
   }

   reg_expression& assign(const charT* arg_first,
                          const charT* arg_last,
                          flag_type f = regex_constants::normal)
   {
      set_expression(arg_first, arg_last, f | regex_constants::use_except);
      return *this;
   }
#if !defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(__IBMCPP__)

   template <class ST, class SA>
   unsigned int BOOST_REGEX_CALL set_expression(const std::basic_string<charT, ST, SA>& p, flag_type f = regex_constants::normal)
   { return set_expression(p.data(), p.data() + p.size(), f); }

   template <class ST, class SA>
   explicit reg_expression(const std::basic_string<charT, ST, SA>& p, flag_type f = regex_constants::normal, const Allocator& a = Allocator())
    : data(a), pkmp(0), error_code_(REG_EMPTY), _expression(0) { set_expression(p, f | regex_constants::use_except); }

   template <class InputIterator>
   reg_expression(InputIterator arg_first, InputIterator arg_last, flag_type f = regex_constants::normal, const Allocator& al = Allocator())
    : data(al), pkmp(0), error_code_(REG_EMPTY), _expression(0)
   {
      std::basic_string<charT> a(arg_first, arg_last);
      set_expression(a.data(), a.data() + a.size(), f | regex_constants::use_except);
   }

   template <class ST, class SA>
   reg_expression& BOOST_REGEX_CALL operator=(const std::basic_string<charT, ST, SA>& p)
   {
      set_expression(p.c_str(), p.c_str() + p.size(), regex_constants::normal | regex_constants::use_except);
      return *this;
   }

   template <class string_traits, class A>
   reg_expression& BOOST_REGEX_CALL assign(
       const std::basic_string<charT, string_traits, A>& s,
       flag_type f = regex_constants::normal)
   {
      set_expression(s.c_str(), s.c_str() + s.size(), f | regex_constants::use_except);
      return *this;
   }

   template <class InputIterator>
   reg_expression& BOOST_REGEX_CALL assign(InputIterator arg_first,
                          InputIterator arg_last,
                          flag_type f = regex_constants::normal)
   {
      std::basic_string<charT> a(arg_first, arg_last);
      set_expression(a.data(), a.data() + a.size(), f | regex_constants::use_except);
      return *this;
   }
#else
   unsigned int BOOST_REGEX_CALL set_expression(const std::basic_string<charT>& p, flag_type f = regex_constants::normal)
   { return set_expression(p.data(), p.data() + p.size(), f | regex_constants::use_except); }

   reg_expression(const std::basic_string<charT>& p, flag_type f = regex_constants::normal, const Allocator& a = Allocator())
    : data(a), pkmp(0) { set_expression(p, f | regex_constants::use_except); }

   reg_expression& BOOST_REGEX_CALL operator=(const std::basic_string<charT>& p)
   {
      set_expression(p.c_str(), p.c_str() + p.size(), regex_constants::normal | regex_constants::use_except);
      return *this;
   }

   reg_expression& BOOST_REGEX_CALL assign(
       const std::basic_string<charT>& s,
       flag_type f = regex_constants::normal)
   {
      set_expression(s.c_str(), s.c_str() + s.size(), f | regex_constants::use_except);
      return *this;
   }

#endif


   //
   // allocator access:
   Allocator BOOST_REGEX_CALL get_allocator()const;
   //
   // locale:
   locale_type BOOST_REGEX_CALL imbue(locale_type l){ return traits_inst.imbue(l); }
   locale_type BOOST_REGEX_CALL getloc()const{ return traits_inst.getloc(); }
   //
   // getflags:
   // retained for backwards compatibility only, the base class has "flags"
   // member which is now the prefered name:
   flag_type BOOST_REGEX_CALL getflags()const
   { return this->flags(); }
   //
   // str:
   std::basic_string<charT> BOOST_REGEX_CALL str()const
   {
      std::basic_string<charT> result;
      if(this->error_code() == 0)
         result = std::basic_string<charT>(_expression, _expression_len);
      return result;
   }
   //
   // begin, end:
   const_iterator BOOST_REGEX_CALL begin()const
   { return (this->error_code() ? 0 : _expression); }
   const_iterator BOOST_REGEX_CALL end()const