Abort Current Recording: Example and Test
 # 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 incase throw occured 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; } 
Input File: example/general/abort_recording.cpp