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// Copyright 2015-2017 Hans Dembinski
//
// 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/histogram/detail/make_default.hpp>
#include <new>
#include <vector>
using namespace boost::histogram::detail;
template <class T>
struct allocator_with_state {
using value_type = T;
allocator_with_state(int s = 0) : state(s) {}
template <class U>
allocator_with_state(const allocator_with_state<U>& o) : state(o.state) {}
value_type* allocate(std::size_t n) {
return static_cast<value_type*>(::operator new(n * sizeof(T)));
}
void deallocate(value_type* ptr, std::size_t) {
::operator delete(static_cast<void*>(ptr));
}
template <class U>
bool operator==(const allocator_with_state<U>&) const {
return true;
}
template <class U>
bool operator!=(const allocator_with_state<U>&) const {
return false;
}
int state;
};
int main() {
using V = std::vector<int, allocator_with_state<int>>;
V a(3, 0, allocator_with_state<int>{42});
V b = make_default(a);
V c;
BOOST_TEST_EQ(a.size(), 3);
BOOST_TEST_EQ(b.size(), 0);
BOOST_TEST_EQ(c.size(), 0);
BOOST_TEST_EQ(a.get_allocator().state, 42);
BOOST_TEST_EQ(b.get_allocator().state, 42);
BOOST_TEST_EQ(c.get_allocator().state, 0);
return boost::report_errors();
}
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