Files
dynamic_bitset/test/test_std_hash.cpp
Gennaro Prota 809b7a3796 Also test std::hash with bitsets having equal underlying vectors
This makes sure the size of the bitset is taken into account in the
calculation of the hash value.
2025-10-15 11:41:44 +02:00

41 lines
1.3 KiB
C++

//
// Copyright (C) 2019 James E. King III
// Copyright (C) 2025 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)
//
#include "boost/core/lightweight_test.hpp"
#include "boost/dynamic_bitset.hpp"
#include <unordered_set>
int
main( int, char *[] )
{
typedef boost::dynamic_bitset< unsigned long > bitset_type;
const std::string long_string =
"01001110101110110101011010000000000011110101101111111111";
// Some bitsets with the same size but different underlying vectors.
const bitset_type zeroes( long_string.size(), 0 );
const bitset_type stuff( long_string );
const bitset_type one( long_string.size(), 1 );
// Some bitsets with different sizes but equal underlying vectors.
const bitset_type zeroes2( 2, 0 );
const bitset_type zeroes3( 3, 0 );
std::unordered_set< bitset_type > bitsets;
bitsets.insert( zeroes );
bitsets.insert( stuff );
bitsets.insert( one );
bitsets.insert( zeroes2 );
bitsets.insert( zeroes3 );
BOOST_TEST_EQ( bitsets.size(), 5 );
return boost::report_errors();
}