// -----------------------------------------------------------

// Copyright (c) 2026 Gennaro Prota

//

// 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)

//

// -----------------------------------------------------------

// Checks that the library can be used when the compiler is in C++17

// mode but the standard library does not provide std::basic_string_view

// (as is the case, e.g., for Clang with the libstdc++ of GCC 6). We can

// simulate that only with the standard library of MSVC, whose C++17

// components can be disabled by defining _HAS_CXX17 to 0 (and

// _HAS_CXX20 to 0 as well, since the standard library of Visual Studio

// 2019 requires both to be defined if either is). Elsewhere, and in

// other modes, this is just a basic sanity test.

#if defined( _MSC_VER ) && defined( _MSVC_LANG ) && _MSVC_LANG == 201703L

# define BOOST_DYNAMIC_BITSET_TEST_NO_STRING_VIEW

# define _HAS_CXX17 0

# define _HAS_CXX20 0

#endif

#include "boost/config.hpp"

#include "boost/core/lightweight_test.hpp"

#include "boost/dynamic_bitset.hpp"

#include <string>

#if defined( BOOST_DYNAMIC_BITSET_TEST_NO_STRING_VIEW ) \

&& ! defined( BOOST_NO_CXX17_HDR_STRING_VIEW )

# error "The simulation of a standard library without string_view failed"

#endif

int

main()

{

const boost::dynamic_bitset<> b( std::string( "1101" ) );

BOOST_TEST_EQ( b.size(), 4u );

BOOST_TEST_EQ( b.to_ulong(), 13ul );

return boost::report_errors();

}