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// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
// SPDX-FileCopyrightText: Bradley M. Bell <bradbell@seanet.com>
// SPDX-FileContributor: 2003-22 Bradley M. Bell
// ----------------------------------------------------------------------------
# include <cppad/cppad.hpp>
bool RevTwo()
{ bool ok = true;
using CppAD::AD;
using CppAD::vector;
using CppAD::NearEqual;
double eps99 = 99.0 * std::numeric_limits<double>::epsilon();
size_t n = 2;
vector< AD<double> > X(n);
X[0] = 1.;
X[1] = 1.;
Independent(X);
size_t m = 1;
vector< AD<double> > Y(m);
Y[0] = X[0] * X[0] + X[0] * X[1] + 2. * X[1] * X[1];
CppAD::ADFun<double> F(X,Y);
vector<double> x(n);
x[0] = .5;
x[1] = 1.5;
size_t L = 1;
vector<size_t> I(L);
vector<size_t> J(L);
vector<double> H(n);
I[0] = 0;
J[0] = 0;
H = F.RevTwo(x, I, J);
ok &= NearEqual(H[0], 2., eps99, eps99);
ok &= NearEqual(H[1], 1., eps99, eps99);
J[0] = 1;
H = F.RevTwo(x, I, J);
ok &= NearEqual(H[0], 1., eps99, eps99);
ok &= NearEqual(H[1], 4., eps99, eps99);
return ok;
}
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