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// Copyright 2024 Ruggero Turra, 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 <array>
#include <boost/core/lightweight_test.hpp>
#include <boost/core/span.hpp>
#include <boost/histogram/accumulators/collector.hpp>
#include <boost/histogram/accumulators/ostream.hpp>
#include <boost/histogram/detail/accumulator_traits.hpp>
#include <boost/histogram/detail/chunk_vector.hpp>
#include <string>
#include <tuple>
#include <type_traits>
#include "ostream.hpp"
#include "str.hpp"
#include "throw_exception.hpp"
using namespace boost::histogram;
namespace boost {
template <class T1, class T2>
bool operator==(const span<T1>& a, const std::vector<T2>& b) {
return std::equal(a.begin(), a.end(), b.begin(), b.end());
}
} // namespace boost
int main() {
using traits = detail::accumulator_traits<accumulators::collector<>>;
static_assert(!traits::weight_support, "");
static_assert(std::is_same<traits::args, std::tuple<const double&>>::value, "");
{
accumulators::collector<std::vector<int>> acc;
BOOST_TEST_EQ(acc.count(), 0);
BOOST_TEST_EQ(acc.size(), 0);
BOOST_TEST_EQ(str(acc), "collector{}");
acc(1);
BOOST_TEST_EQ(str(acc), "collector{1}");
acc(2);
BOOST_TEST_EQ(str(acc), "collector{1, 2}");
BOOST_TEST_EQ(acc.count(), 2);
BOOST_TEST_EQ(acc.size(), 2);
const std::vector<int> ref = {{1, 2}};
BOOST_TEST_ALL_EQ(acc.begin(), acc.end(), ref.begin(), ref.end());
}
{
accumulators::collector<std::vector<int>> acc{{1, 2}};
accumulators::collector<std::vector<int>> copy(acc);
BOOST_TEST_ALL_EQ(copy.begin(), copy.end(), acc.begin(), acc.end());
copy(3);
BOOST_TEST_EQ(copy.size(), 3);
BOOST_TEST_NE(acc, copy);
}
{
accumulators::collector<std::vector<int>> acc1;
acc1(1);
acc1(2);
accumulators::collector<std::vector<int>> acc2;
BOOST_TEST_NE(acc1, acc2); // acc2 is empty
acc2(2);
acc2(1);
BOOST_TEST_EQ(str(acc2), "collector{2, 1}");
BOOST_TEST_NE(acc1, acc2); // order matters
accumulators::collector<std::vector<int>> acc3;
acc3(1);
acc3(2);
BOOST_TEST_EQ(acc1, acc3);
// comparison to another embedded container type
accumulators::collector<std::vector<double>> acc4;
acc4(1);
acc4(2);
BOOST_TEST_EQ(acc1, acc4);
// comparison to another container type
std::vector<double> arr = {{1.0, 2.0}};
BOOST_TEST_EQ(acc1, arr);
}
{
BOOST_TEST_EQ(accumulators::collector<>{} += accumulators::collector<>{},
accumulators::collector<>{});
accumulators::collector<> acc1;
acc1(1);
acc1(2);
accumulators::collector<> acc2;
acc1 += acc2; // acc1 = [1, 2] acc2 = []
BOOST_TEST_EQ(acc1.count(), 2);
acc2(3); // acc2 = [3]
acc1 += acc2; // acc = [1, 2, 3] acc2 = [3]
BOOST_TEST_EQ(acc1.count(), 3);
BOOST_TEST_EQ(str(acc1), "collector{1, 2, 3}");
acc1 += accumulators::collector<std::vector<double>>{{4.0, 5.0}};
BOOST_TEST_EQ(acc1.count(), 5);
BOOST_TEST_EQ(str(acc1), "collector{1, 2, 3, 4, 5}");
}
{
using A = std::array<int, 2>;
accumulators::collector<std::vector<A>> acc;
acc(A{1, 2});
BOOST_TEST_EQ(acc.size(), 1);
BOOST_TEST_EQ(str(acc), "collector{[ 1 2 ]}");
acc(A{3, 4});
BOOST_TEST_EQ(str(acc), "collector{[ 1 2 ], [ 3 4 ]}");
BOOST_TEST_EQ(acc, (std::vector<A>{A{1, 2}, A{3, 4}}));
}
{
accumulators::collector<detail::chunk_vector<int>> acc(2);
std::vector<int> x = {{1, 2}};
acc(x);
BOOST_TEST_EQ(acc.size(), 1);
BOOST_TEST_EQ(acc[0], x);
x = {{3, 4}};
acc(x);
BOOST_TEST_EQ(acc.size(), 2);
std::vector<int> x2 = {{1, 2}};
BOOST_TEST_EQ(acc[0], x2);
BOOST_TEST_EQ(acc[1], x);
BOOST_TEST_EQ(acc[1][0], 3);
BOOST_TEST_EQ(acc[1][1], 4);
}
return boost::report_errors();
}
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