Missing support for erf() in forward2sweep()

[joaoleal]

Support for the operation type ErfOp is not yet implemented in forward2sweep() which is used, for instance, to determine the sparse Jacobian.

Here is an example showing the issue:

    using CppAD::AD;

    // domain space vector
    size_t n  = 1;
    double x0 = 0.5;
    CPPAD_TESTVECTOR(AD<double>) ax(n);
    ax[0]     = x0;

    // declare independent variables and start tape recording
    CppAD::Independent(ax);

    // range space vector
    size_t m = 1;
    CPPAD_TESTVECTOR(AD<double>) ay(m);
    ay[0] = CppAD::erf(ax[0]);

    // create f: x -> y and stop tape recording
    CppAD::ADFun<double> f(ax, ay); // OK

    // forward computation of first partial w.r.t. x[0]
    CPPAD_TESTVECTOR(double) dx(n);
    CPPAD_TESTVECTOR(double) dy(m);
    dx[0] = 1.;
    dy    = f.Forward(1, dx); // OK

    // reverse computation of derivative of y[0]
    CPPAD_TESTVECTOR(double)  w(m);
    CPPAD_TESTVECTOR(double) dw(n);
    w[0]  = 1.;
    dw    = f.Reverse(1, w); // OK

    // sparse Jacobian
    f.SparseJacobian(dx); // Failure here

[bradbell]

I think I have fixed the problem with the following commit:
96c804b

Please check this and close the bug if this change passes your tests.
Brad

[joaoleal]

That worked.
Thank you!