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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 .
Number of Variables that Can be Skipped

Syntax
n = f.number_skip()

See Also
fun_property

Purpose
The conditional expressions use either the if_true or if_false . Hence, some terms only need to be evaluated depending on the value of the comparison in the conditional expression. The optimize option is capable of detecting some of these case and determining variables that can be skipped. This routine returns the number such variables.

n
The return value n has type size_t is the number of variables that the optimizer has determined can be skipped (given the independent variable values specified by the previous call to f.Forward for order zero).

f
The object f has prototype
    ADFun<Base> f
Example
The file number_skip.cpp contains an example and test of this function.
Input File: include/cppad/core/num_skip.hpp