/*
 * join.hpp -- join lists into a string
 *
 * Copyright (c) 2013-2018 David Demelier <markand@malikania.fr>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/**
 * \file join.hpp
 * \brief Join function
 */

#include <initializer_list>
#include <sstream>
#include <string>

/**
 * Join values by a separator and return a string.
 *
 * \param first the first iterator
 * \param last the last iterator
 * \param delim the optional delimiter
 * \return the string
 */
template <typename InputIt, typename DelimType = char>
auto join(InputIt first, InputIt last, DelimType delim = ':') -> std::string
{
	std::ostringstream oss;

	if (first != last) {
		oss << *first;

		while (++first != last)
			oss << delim << *first;
	}

	return oss.str();
}

/**
 * Convenient overload.
 *
 * \param list the initializer list
 * \param delim the delimiter
 * \return the string
 */
template <typename T, typename DelimType = char>
auto join(std::initializer_list<T> list, DelimType delim = ':') -> std::string
{
	return join(list.begin(), list.end(), delim);
}