[CppAD] ad tapeless mode

[Brad Bell]

In short, the answer is no. CppAD always tapes the operations and then 
uses function objects to calculate derivatives in either forward or 
reverse mode.

The tape only stores the operators and not the values. The values 
corresponding to the operators are computed and stored by the function 
object. You can use the Taylor coefficient capacity function to free 
Taylor coefficient when they are no longer needed; see
    http://www.coin-or.org/CppAD/Doc/capacity_taylor.xml
Note that the constructor
    ADFun<Base> f(x, y)
calculates and stores the zero order Taylor coefficients in the function 
object. On the other hand
    ADFun<Base> f;
    f.Dependent(x, y)
does not. See the heading Discussion on
    http://www.coin-or.org/CppAD/Doc/capacity_taylor.xml

   
Mathias Krause wrote:
> Dear Sir or Madam,
>
> Is it possible to use CPPAD without taping a trace? If so, could you kindly
> send me an email with a small example or refer to the documentation.
>
> Tanks,
>
> Mit freundlichen Gruessen / Kind regards
> Mathias Krause
>
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