[ndnSIM] [EXT] Private Class Error even after an Attempt to Fix

[Junxiao Shi]

Hi Justin

You are supposed to call SetPosition
<https://www.nsnam.org/docs/release/3.33/doxygen/classns3_1_1_mobility_model.html#ac584b3d5a309709d2f13ed6ada1e7640>
public
function from outside.
The DoSetPosition virtual function is for subclasses to implement the
functionality, and should not be used elsewhere.
See Public Virtual Methods: A Bad Idea
<https://blog.spatial.com/3d-software-development-kits/public-virtual-methods-bad-idea>
for why ns-3 designed it this way.

Yours, Junxiao

On Mon, Jun 28, 2021 at 12:39 PM Justin Rodrigues via ndnSIM <
ndnsim at lists.cs.ucla.edu> wrote:

> *External Email*
> Hello Everyone,
>
> I hope you are doing well.
>
> Currently I am facing an error like this which I am unsure how to correct
> since I have not had it before in c++.
>
> ../src/ndnSIM/examples/mobility-tree-walk3.cpp: In function ‘int
> ns3::main(int, char**)’:
> ../src/ndnSIM/examples/mobility-tree-walk3.cpp:171:37: error: ‘virtual
> void ns3::ConstantVelocityMobilityModel::DoSetPosition(const Vector&)’ is
> private within this context
>    myM.DoSetPosition(Vector(10,10,10));
>                                      ^
> In file included from ./ns3/mobility-module.h:14:0,
>                  from ../src/ndnSIM/examples/mobility-tree-walk3.cpp:24:
> ./ns3/constant-velocity-mobility-model.h:59:16: note: declared private here
>    virtual void DoSetPosition (const Vector &position);
>                 ^~~~~~~~~~~~~
>
> Waf: Leaving directory
> `/home/justin/Downloads/ndn_sim_mobility/ndnsim/ns-3/build'
> Build failed
>  -> task in 'mobility-tree-walk3' failed with exit status 1 (run with -v
> to display more information)
>
> It is not letting me access a function since its declared as private so I
> havedeclared the function in the c++ document and edited that file to make
> the function pubilc yet ns-3 still thinks its private.
>
> Sincerely,
>
> Justin Rodrigues
>
>
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