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// Copyright 2015-2018 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_make_dynamic_histogram
#include <boost/histogram.hpp>
#include <cassert>
#include <sstream>
#include <vector>
const char* config = "4 1.0 2.0\n"
"5 3.0 4.0\n";
int main() {
using namespace boost::histogram;
// read axis config from a config file (mocked here with std::istringstream)
// and create vector of regular axes, the number of axis is not known at compile-time
std::istringstream is(config);
auto v1 = std::vector<axis::regular<>>();
while (is.good()) {
unsigned bins;
double start, stop;
is >> bins >> start >> stop;
v1.emplace_back(bins, start, stop);
}
// create histogram from iterator range
// (copying or moving the vector also works, move is shown below)
auto h1 = make_histogram(v1.begin(), v1.end());
assert(h1.rank() == v1.size());
// with a vector of axis::variant (polymorphic axis type that can hold any one of the
// template arguments at a time) the types and number of axis can vary at run-time
auto v2 = std::vector<axis::variant<axis::regular<>, axis::integer<>>>();
v2.emplace_back(axis::regular<>(100, -1.0, 1.0));
v2.emplace_back(axis::integer<>(1, 7));
// create dynamic histogram by moving the vector
auto h2 = make_histogram(std::move(v2));
assert(h2.rank() == 2);
}
//]
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