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@(@\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}} }@)@ This is cppad-20221105 documentation. Here is a link to its current documentation .
ADFun Function Name: Example and Test

# include <cppad/cppad.hpp>

bool function_name(void)
{   bool ok = true;
    using CppAD::AD;

    // create empty function
    CppAD::ADFun<double> f;

    // check its name
    ok &= f.function_name_get() == "";

    // set and check a new name
    f.function_name_set("empty_function");
    ok &= f.function_name_get() == "empty_function";

    // store an operation sequence in f
    size_t nx = 1;
    size_t ny = 1;
    CPPAD_TESTVECTOR( AD<double> ) ax(nx), ay(ny);
    ax[0] = 1.0;
    CppAD::Independent(ax);
    ay[0] = sin(ax[0]);
    f.Dependent(ax, ay);

    // check fucntion name has not changed
    ok &= f.function_name_get() == "empty_function";

    // now set a better name for this function
    f.function_name_set("sin");
    ok &= f.function_name_get() == "sin";

    return ok;
}
Input File: example/general/function_name.cpp