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