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// Copyright Nick Thompson 2017.
// Use, modification and distribution are subject to 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)
//
// Basic sanity check that header <boost/math/special_functions/gamma.hpp>
// #includes all the files that it needs to.
//
#include <boost/math/differentiation/autodiff.hpp>
//
// Note this header includes no other headers, this is
// important if this test is to be meaningful:
//
#include "test_compile_result.hpp"
template <typename T>
T fourth_power(T const& x) {
T x4 = x * x; // retval in operator*() uses x4's memory via NRVO.
x4 *= x4; // No copies of x4 are made within operator*=() even when squaring.
return x4; // x4 uses y's memory in main() via NRVO.
}
void compile_and_link_test()
{
using namespace boost::math::differentiation;
auto const x = make_fvar<double, 5>(2.0); // Find derivatives at x=2.
auto const y = fourth_power(x);
check_result<double>(y.derivative(1));
}
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