//
// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
//
// Distributed under 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)
//
// Official repository: https://github.com/boostorg/fixed_string
//

#ifndef BOOST_FIXED_STRING_CONFIG_HPP
#define BOOST_FIXED_STRING_CONFIG_HPP

// Are we dependent on Boost?
//#define BOOST_FIXED_STRING_USE_BOOST

// C++ version
#if __cplusplus >= 201703L
#define BOOST_FIXED_STRING_CPP17
#elif __cplusplus >= 201402L
#define BOOST_FIXED_STRING_CPP14
#else
#define BOOST_FIXED_STRING_CPP11
#endif

// See if we can use `string_view`
#if defined(BOOST_FIXED_STRING_CPP17) || defined(BOOST_FIXED_STRING_USE_BOOST)
#define BOOST_FIXED_STRING_STRING_VIEW
#endif

#ifdef BOOST_FIXED_STRING_USE_BOOST
#include <boost/utility/string_view.hpp>
#include <boost/assert.hpp>
#include <boost/static_assert.hpp>
#include <boost/throw_exception.hpp>
#else
#include <cassert>
#ifdef BOOST_FIXED_STRING_CPP17
#include <string_view>
#endif
#endif

// Boost and non-Boost versions of utilities
#ifdef BOOST_FIXED_STRING_USE_BOOST
#define BOOST_FIXED_STRING_THROW(ex) BOOST_THROW_EXCEPTION(ex)
#define BOOST_FIXED_STRING_STATIC_ASSERT(cond, msg) BOOST_STATIC_ASSERT_MSG(cond, msg)
#define BOOST_FIXED_STRING_ASSERT(cond) BOOST_ASSERT(cond)
#ifdef BOOST_NODISCARD
#define BOOST_FIXED_STRING_NODISCARD BOOST_NODISCARD
#else
#define BOOST_FIXED_STRING_NODISCARD
#endif
#else
#define BOOST_FIXED_STRING_THROW(ex) throw ex
#define BOOST_FIXED_STRING_STATIC_ASSERT(cond, msg) static_assert(cond, msg)
#define BOOST_FIXED_STRING_ASSERT(cond) assert(cond)
#ifdef BOOST_FIXED_STRING_CPP17
#define BOOST_FIXED_STRING_NODISCARD [[nodiscard]]
#else
#define BOOST_FIXED_STRING_NODISCARD
#endif
#endif

namespace boost {
namespace fixed_string {

/// The type of `string_view` used by the library
#ifdef BOOST_FIXED_STRING_STRING_VIEW
using string_view = 
#ifdef BOOST_FIXED_STRING_USE_BOOST
    boost::string_view;
#else
    std::string_view;
#endif
#endif

/// The type of `basic_string_view` used by the library
#ifdef BOOST_FIXED_STRING_STRING_VIEW
template<typename CharT, typename Traits>
using basic_string_view =
#ifdef BOOST_FIXED_STRING_USE_BOOST
    boost::basic_string_view<CharT, Traits>;
#else
    std::basic_string_view<CharT, Traits>;
#endif
#endif
} // fixed_string
} // boost

#endif