mirror of
https://github.com/boostorg/system.git
synced 2026-07-05 16:00:55 +02:00
55 lines
1.2 KiB
C++
55 lines
1.2 KiB
C++
|
// Copyright 2026 Peter Dimov
|
||
|
|
// Distributed under the Boost Software License, Version 1.0.
|
||
|
|
// https://www.boost.org/LICENSE_1_0.txt
|
||
|
|
|
||
|
|
#include <boost/system/error_code.hpp>
|
||
|
|
#include <boost/system/error_condition.hpp>
|
||
|
|
#include <boost/config/pragma_message.hpp>
|
||
|
|
#include <boost/static_assert.hpp>
|
||
|
|
#include <cstdio>
|
||
|
|
|
||
|
|
#if !defined(BOOST_SYSTEM_HAS_CXX20_CONSTEXPR)
|
||
|
|
|
||
|
|
BOOST_PRAGMA_MESSAGE("Skipping constexpr test, BOOST_SYSTEM_HAS_CXX20_CONSTEXPR isn't defined")
|
||
|
|
int main() {}
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
namespace sys = boost::system;
|
||
|
|
|
||
|
|
class user_category: public sys::error_category
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
|
||
|
|
constexpr virtual const char* name() const noexcept
|
||
|
|
{
|
||
|
|
return "user";
|
||
|
|
}
|
||
|
|
|
||
|
|
virtual std::string message( int ev ) const
|
||
|
|
{
|
||
|
|
char buffer[ 256 ];
|
||
|
|
std::snprintf( buffer, sizeof( buffer ), "user message %d", ev );
|
||
|
|
|
||
|
|
return buffer;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
static constexpr user_category s_user_cat;
|
||
|
|
|
||
|
|
constexpr sys::error_code ec( 1, s_user_cat );
|
||
|
|
|
||
|
|
BOOST_STATIC_ASSERT( ec.failed() );
|
||
|
|
BOOST_STATIC_ASSERT( ec );
|
||
|
|
BOOST_STATIC_ASSERT( !!ec );
|
||
|
|
|
||
|
|
constexpr sys::error_condition en( 1, s_user_cat );
|
||
|
|
|
||
|
|
BOOST_STATIC_ASSERT( en.failed() );
|
||
|
|
BOOST_STATIC_ASSERT( en );
|
||
|
|
BOOST_STATIC_ASSERT( !!en );
|
||
|
|
|
||
|
|
int main() {}
|
||
|
|
|
||
|
|
#endif
|