container_hash/doc/samples/tutorial.cpp
Daniel James 9fafa9e37b Fix tutorial example (trac #11017)
Extract example into a C++ file, so that it can be tested, unfortunately this
means that it no longer links to the reference documentation.
2018-03-03 18:36:28 +00:00

28 lines
672 B
C++

#include <boost/container_hash/hash.hpp>
#include <vector>
#include <algorithm>
#include <iterator>
#include <cassert>
//[ get_hashes
template <class Container>
std::vector<std::size_t> get_hashes(Container const& x)
{
std::vector<std::size_t> hashes;
std::transform(x.begin(), x.end(), std::back_inserter(hashes),
boost::hash<typename Container::value_type>());
return hashes;
}
//]
int main() {
std::vector<int> values;
values.push_back(10);
values.push_back(20);
std::vector<std::size_t> hashes = get_hashes(values);
assert(hashes[0] = boost::hash<int>()(values[0]));
assert(hashes[1] = boost::hash<int>()(values[1]));
}