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4a2e3db0e0
* renaming naked to remove_cvref_t * more static_asserts to check implicit conditions * use new BOOST_TEST_TRAIT_SAME * reorganize and add operator tests, fixes for array and map adaptors * improved map adaptor * storage does not have to support scaling operator anymore * doc improvements
46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
// Copyright 2019 Hans Dembinski
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt
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// or copy at http://www.boost.org/LICENSE_1_0.txt)
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//[ guide_axis_circular
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#include <boost/histogram/axis.hpp>
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#include <limits>
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int main() {
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using namespace boost::histogram;
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// make a circular regular axis ... [1, 2), [2, 3), [3, 4), [1, 2) ....
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auto r = axis::regular<double, axis::transform::id, axis::default_metadata,
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axis::join(axis::option::use_default, axis::option::circular)>{
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3, 1., 4.};
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assert(r.index(0.01) == 2);
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assert(r.index(1.01) == 0);
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assert(r.index(2.01) == 1);
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assert(r.index(3.01) == 2);
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assert(r.index(4.01) == 0);
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assert(r.index(5.01) == 1);
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assert(r.index(6.01) == 2);
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// special values are mapped to the overflow bin index
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assert(r.index(std::numeric_limits<double>::infinity()) == 3);
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assert(r.index(-std::numeric_limits<double>::infinity()) == 3);
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assert(r.index(std::numeric_limits<double>::quiet_NaN()) == 3);
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// since the regular axis is the most common circular axis, there exists an alias
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auto c = axis::circular<>{3, 1., 4.};
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assert(r == c);
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// make a circular integer axis
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auto i = axis::integer<int, axis::default_metadata, axis::option::circular>{1, 4};
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assert(i.index(0) == 2);
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assert(i.index(1) == 0);
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assert(i.index(2) == 1);
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assert(i.index(3) == 2);
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assert(i.index(4) == 0);
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assert(i.index(5) == 1);
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}
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//]
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