44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
|
|
// Copyright 2006-2009 Daniel James.
|
|
// 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/unordered_set.hpp>
|
|
#include <boost/functional/hash.hpp>
|
|
#include <boost/core/lightweight_test.hpp>
|
|
|
|
//[point_example2
|
|
struct point {
|
|
int x;
|
|
int y;
|
|
};
|
|
|
|
bool operator==(point const& p1, point const& p2)
|
|
{
|
|
return p1.x == p2.x && p1.y == p2.y;
|
|
}
|
|
|
|
std::size_t hash_value(point const& p) {
|
|
std::size_t seed = 0;
|
|
boost::hash_combine(seed, p.x);
|
|
boost::hash_combine(seed, p.y);
|
|
return seed;
|
|
}
|
|
|
|
// Now the default function objects work.
|
|
boost::unordered_multiset<point> points;
|
|
//]
|
|
|
|
int main() {
|
|
point x[] = {{1,2}, {3,4}, {1,5}, {1,2}};
|
|
for(int i = 0; i < sizeof(x) / sizeof(point); ++i)
|
|
points.insert(x[i]);
|
|
BOOST_TEST(points.count(x[0]) == 2);
|
|
BOOST_TEST(points.count(x[1]) == 1);
|
|
point y = {10, 2};
|
|
BOOST_TEST(points.count(y) == 0);
|
|
|
|
return boost::report_errors();
|
|
}
|
|
|