//Copyright (c) 2002 David J. Sankel
//
//Permission to use, copy, modify, distribute and sell this software
//and its documentation for any purpose is hereby granted without fee,
//provided that the above copyright notice appear in all copies and
//that both that copyright notice and this permission notice appear
//in supporting documentation.  David J. Sankel makes no representations
//about the suitability of this software for any purpose.
//It is provided "as is" without express or implied warranty.

#include <string>
#include <iostream>
#include <iomanip>
#include <iterator>
#include <cstdlib>
#include <sstream>

#include <boost/regex.hpp>

using namespace std;

int main( char argc, char ** argv)
{
	const string error_message = "USEAGE: sed s/regex/format/\n"

	std::ios::sync_with_stdio( false );  //Speed optimization
	std::cin.unsetf( std::ios::skipws ); //Allows cin >> char to get whitespace

	if( argc != 2 )
	{
		std::cerr << error_message;
		return EXIT_FAILURE;
	}

	string s = argv[1]; //The regex;
	const boost::regex input( "^s/(.*)/(.*)/" );
	boost::smatch what;
	if( !regex_match( s, what,  input ) )
	{
		std::cerr << error_message;
		return EXIT_FAILURE;
	}
	//The following is the way I'd like to use the regex_merge.
	boost::regex_merge( 
			std::ostream_iterator< char >( cout ),
			std::istream_iterator< char >( cin ),
			std::istream_iterator< char >(),
			boost::regex( string( what[1] ) ),
			string( what[2] ), 
			boost::match_default | boost::match_not_dot_newline |
			boost::format_sed );
	//The following is the way I am doing regex_merge now.
//	ostringstream t;
//	t << cin.rdbuf();
//	s = t.str();
//	boost::regex_merge( 
//			std::ostream_iterator< char >( cout ),
//			s.begin(), s.end(),
//			boost::regex( string( what[1] ) ),
//			string( what[2] ), 
//			boost::match_default | boost::match_not_dot_newline |
//			boost::format_sed );
}