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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)
// clang-format off
//[ guide_axis_growing
#include <boost/histogram.hpp>
#include <cassert>
#include <iostream>
int main() {
using namespace boost::histogram;
// make a growing regular axis
// - it grows new bins with its constant bin width until the value is covered
auto h1 = make_histogram(axis::regular<double,
use_default,
use_default,
axis::option::growth_t>{2, 0., 1.});
// nothing special happens here
h1(0.1);
h1(0.9);
// state: [0, 0.5): 1, [0.5, 1.0): 1
assert(h1.axis().size() == 2);
assert(h1.axis().bin(0).lower() == 0.0);
assert(h1.axis().bin(1).upper() == 1.0);
// value below range: axis grows new bins until value is in range
h1(-0.3);
// state: [-0.5, 0.0): 1, [0, 0.5): 1, [0.5, 1.0): 1
assert(h1.axis().size() == 3);
assert(h1.axis().bin(0).lower() == -0.5);
assert(h1.axis().bin(2).upper() == 1.0);
h1(1.9);
// state: [-0.5, 0.0): 1, [0, 0.5): 1, [0.5, 1.0): 1, [1.0, 1.5): 0 [1.5, 2.0): 1
assert(h1.axis().size() == 5);
assert(h1.axis().bin(0).lower() == -0.5);
assert(h1.axis().bin(4).upper() == 2.0);
// make a growing category axis (here strings)
// - empty axis is allowed: very useful if categories are not known at the beginning
auto h2 = make_histogram(axis::category<std::string,
use_default,
axis::option::growth_t>());
assert(h2.size() == 0); // histogram is empty
h2("foo"); // new bin foo, index 0
assert(h2.size() == 1);
h2("bar"); // new bin bar, index 1
assert(h2.size() == 2);
h2("foo");
assert(h2.size() == 2);
assert(h2[0] == 2);
assert(h2[1] == 1);
}
//]
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