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// Copyright 2021, 2022 Peter Dimov.
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
#include <boost/system/error_code.hpp>
#include <boost/system/error_category.hpp>
#include <boost/system/errc.hpp>
#include <boost/core/lightweight_test.hpp>
#include <boost/config/pragma_message.hpp>
#include <boost/config.hpp>
#include <cerrno>
#if !defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
BOOST_PRAGMA_MESSAGE( "BOOST_SYSTEM_HAS_SYSTEM_ERROR not defined, test will be skipped" )
int main() {}
#else
#include <system_error>
enum my_errc
{
my_enoent = ENOENT
};
class my_category: public boost::system::error_category
{
public:
char const* name() const BOOST_NOEXCEPT
{
return "mycat";
}
boost::system::error_condition default_error_condition( int ev ) const BOOST_NOEXCEPT
{
switch( ev )
{
case my_enoent:
return boost::system::error_condition( ENOENT, boost::system::generic_category() );
default:
return boost::system::error_condition( ev, *this );
}
}
std::string message( int ev ) const
{
switch( ev )
{
case my_enoent:
return "No such entity";
default:
return "Unknown error";
}
}
};
#if defined(BOOST_GCC) && BOOST_GCC < 70000
// g++ 6 and earlier do not allow specializations outside the namespace
namespace boost
{
namespace system
{
template<> struct is_error_code_enum<my_errc>: std::true_type {};
} // namespace system
} // namespace boost
namespace std
{
template<> struct is_error_code_enum<my_errc>: std::true_type {};
} // namespace std
#else
template<> struct boost::system::is_error_code_enum<my_errc>: std::true_type {};
template<> struct std::is_error_code_enum<my_errc>: std::true_type {};
#endif
boost::system::error_code make_error_code( my_errc e )
{
// If `cat` is declared constexpr or const, msvc-14.1 and
// msvc-14.2 before 19.29 put it in read-only memory,
// despite the `ps_` member being mutable. So it crashes.
static /*BOOST_SYSTEM_CONSTEXPR*/ my_category cat;
return boost::system::error_code( e, cat );
}
int main()
{
{
boost::system::error_code e1 = my_enoent;
BOOST_TEST( e1 == my_enoent );
BOOST_TEST_NOT( e1 != my_enoent );
BOOST_TEST( e1 == boost::system::errc::no_such_file_or_directory );
BOOST_TEST( e1 == std::errc::no_such_file_or_directory );
}
{
std::error_code e1 = my_enoent;
BOOST_TEST( e1 == my_enoent );
BOOST_TEST_NOT( e1 != my_enoent );
BOOST_TEST( e1 == std::errc::no_such_file_or_directory );
}
return boost::report_errors();
}
#endif
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