\(\newcommand{\W}[1]{ \; #1 \; }\) \(\newcommand{\R}[1]{ {\rm #1} }\) \(\newcommand{\B}[1]{ {\bf #1} }\) \(\newcommand{\D}[2]{ \frac{\partial #1}{\partial #2} }\) \(\newcommand{\DD}[3]{ \frac{\partial^2 #1}{\partial #2 \partial #3} }\) \(\newcommand{\Dpow}[2]{ \frac{\partial^{#1}}{\partial {#2}^{#1}} }\) \(\newcommand{\dpow}[2]{ \frac{ {\rm d}^{#1}}{{\rm d}\, {#2}^{#1}} }\)

valvector_get_started.cpp

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Getting Started Using valvector as a CppAD Base Class

# include <cppad/example/valvector/class.hpp>
# include <cppad/cppad.hpp>
bool get_started(void)
{   // ok
    bool ok = true;
    //
    // ad_valvector
    typedef CppAD::AD<valvector> ad_valvector;
    //
    // ax
    CPPAD_TESTVECTOR( ad_valvector ) ax(2);
    ax[0] = valvector( {1.0} );
    ax[1] = valvector( {2.0} );
    CppAD::Independent(ax);
    //
    // f
    CPPAD_TESTVECTOR( ad_valvector ) ay(1);
    ay[0] = ax[0] * ax[1];
    CppAD::ADFun<valvector> f(ax, ay);
    //
    // x
    CPPAD_TESTVECTOR( valvector ) x(2);
    x[0] = valvector( {1.0, 2.0, 3.0} );
    x[1] = valvector( {4.0, 3.0, 2.0} );
    //
    // y
    CPPAD_TESTVECTOR( valvector ) y(1);
    y = f.Forward(0, x);
    //
    // ok
    valvector check;
    check = valvector( {4.0, 6.0, 6.0} );
    ok   &= y[0] == check;
    //
    //  dw
    CPPAD_TESTVECTOR( valvector ) w(1), dw(2);
    w[0] = valvector( 1.0 );
    dw   = f.Reverse(1, w);
    //
    // ok
    ok &= dw[0] == x[1];
    ok &= dw[1] == x[0];
    //
    return ok;
}