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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
// ----------------------------------------------------------------------------
/*
{xrst_begin abort_recording.cpp}
Abort Current Recording: Example and Test
#########################################
{xrst_literal
// BEGIN C++
// END C++
}
{xrst_end abort_recording.cpp}
*/
// BEGIN C++
# include <cppad/cppad.hpp>
# include <limits>
bool abort_recording(void)
{ bool ok = true;
double eps = 10. * CppAD::numeric_limits<double>::epsilon();
using CppAD::AD;
try
{ // domain space vector
size_t n = 1;
CPPAD_TESTVECTOR(AD<double>) x(n);
x[0] = 0.;
// declare independent variables and start tape recording
CppAD::Independent(x);
// simulate an error during calculation of y and the execution
// stream was aborted
throw 1;
}
catch (int e)
{ ok &= (e == 1);
// do this in case throw occurred after the call to Independent
// (for case above this is known, but in general it is unknown)
AD<double>::abort_recording();
}
/*
Now make sure that we can start another recording
*/
// declare independent variables and start tape recording
size_t n = 1;
double x0 = 0.5;
CPPAD_TESTVECTOR(AD<double>) x(n);
x[0] = x0;
CppAD::Independent(x);
// range space vector
size_t m = 1;
CPPAD_TESTVECTOR(AD<double>) y(m);
y[0] = 2 * x[0];
// create f: x -> y and stop tape recording
CppAD::ADFun<double> f(x, y);
// forward computation of partials w.r.t. x[0]
CPPAD_TESTVECTOR(double) dx(n);
CPPAD_TESTVECTOR(double) dy(m);
dx[0] = 1.;
dy = f.Forward(1, dx);
ok &= CppAD::NearEqual(dy[0], 2., eps, eps);
return ok;
}
// END C++
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