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// Copyright 2019 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)
//[ guide_axis_circular
#include <boost/histogram/axis.hpp>
#include <limits>
int main() {
using namespace boost::histogram;
// make a circular regular axis ... [0, 180), [180, 360), [0, 180) ....
using opts = decltype(axis::option::overflow | axis::option::circular);
auto r = axis::regular<double, use_default, use_default, opts>{2, 0., 360.};
assert(r.index(-180) == 1);
assert(r.index(0) == 0);
assert(r.index(180) == 1);
assert(r.index(360) == 0);
assert(r.index(540) == 1);
assert(r.index(720) == 0);
// special values are mapped to the overflow bin index
assert(r.index(std::numeric_limits<double>::infinity()) == 2);
assert(r.index(-std::numeric_limits<double>::infinity()) == 2);
assert(r.index(std::numeric_limits<double>::quiet_NaN()) == 2);
// since the regular axis is the most common circular axis, there exists an alias
auto c = axis::circular<>{2, 0., 360.};
assert(r == c);
// make a circular integer axis
auto i = axis::integer<int, use_default, axis::option::circular_t>{1, 4};
assert(i.index(0) == 2);
assert(i.index(1) == 0);
assert(i.index(2) == 1);
assert(i.index(3) == 2);
assert(i.index(4) == 0);
assert(i.index(5) == 1);
}
//]
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