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// Copyright 2024 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#define BOOST_UUID_DISABLE_ALIGNMENT
#include <boost/uuid/uuid.hpp>
#include <boost/core/lightweight_test.hpp>
#include <boost/config/pragma_message.hpp>
#include <cstddef>
#if !defined(__GNUC__)
BOOST_PRAGMA_MESSAGE( "Test skipped, __GNUC__ is not defined" )
int main() {}
#else
using namespace boost::uuids;
// Note: recent GCCs produce the warning
// "ignoring packed attribute because of unpacked non-POD field"
// for X1 and X2, but this is a false positive; the packed attribute
// is not ignored and the tests pass.
//
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114986
struct __attribute__((packed)) X1
{
unsigned char a;
uuid b;
unsigned char c;
};
struct __attribute__((packed)) X2
{
uuid a;
unsigned char b;
unsigned c;
unsigned char d;
};
int main()
{
BOOST_TEST_EQ( offsetof(X1, b), 1 );
BOOST_TEST_EQ( sizeof(X1), 18 );
BOOST_TEST_EQ( offsetof(X2, c), 17 );
BOOST_TEST_EQ( sizeof(X2), 22 );
return boost::report_errors();
}
#endif
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