Hi,
I use "DifferentiableSystem" class together with "EulerSolver" class and
at some moment I want to access old nonlinear solution through
time_solver->old_nonlinear_solution(index)
Now, "time_solver" is an AutoPtr< TimeSolver > in
"DifferentiableSystem" and
function "old_nonlinear_solution" is not virtual in abstract class
"TimeSolver".
So I get a compilation error
(" undefined reference to `TimeSolver::old_nonlinear_solution(unsigned
int) const' ").
My question is should "old_nonlinear_solution" be virtual in "TimeSolver"?
Or I have to access "old_nonlinear_solution" in a different way.
For now I get raw pointer form "time_solver" and do dynamic cast to
"EulerSolver" pointer.
Thanks,
Mladen
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