is this likely to work

[AMD Official Use Only - General]

Hi everyone.
Im a new swig  user,  posted a question last week and got a helpful reply from William.  Thank you for that.
That got me over my first problem. On to the next.

Im using   c++ and perl.

From the c++   I can pass back to the perl  a std_vector<std::string>
The c++ func is

  std::vector<std::string> getStopList() { return m_StopList;}

where
std::vector<std::string> m_StopList;

I added a template in the .i file like...


using namespace std;
%include <std_string.i>
%include <std_vector.i>

namespace std {
  %template(StdStrVector) vector<std::string>;
}


And I can issue the getStopList command in perl and get back the vector of strings..
So far so good

Then I tried a more complicated case using std_ordered_map

William , as recommended I created a swig_4.0.2/share/swig/4.0.2/perl5/std_unordered_map.i
and with the following template entries, the    wrap cxx now seems to compile ok.


using namespace std;
%include <std_string.i>
%include <std_vector.i>
%include <std_unordered_map.i>


typedef std::unordered_map<std::string,std::string>    StrUnOrdMap_t;
%template(StrUnOrdMap_t)    unordered_map<std::string,std::string>;


In fact, the structure in the c++
is a unordered_map   of unordered_maps of unordered_maps  of unordered_maps
Defined in c++  with these typedefs

typedef std::unordered_map<std::string,std::string>    StrUnOrdMap_t;
typedef std::unordered_map<std::string,StrUnOrdMap_t> instToNet_t;
typedef std::unordered_map<std::string,instToNet_t> portToInstToNet_t;
typedef std::unordered_map<std::string,portToInstToNet_t> cellToPortToInstNet_t;

and this top level definition

  cellToPortToInstNet_t            m_CellPortMap;

the c++ for this seems to compile fine (and in fact runs fine,  I can see the contents getting written out from within  the c++ as a debugging step just fine)


so... my  interface file becomes

using namespace std;
%include <std_string.i>
%include <std_vector.i>
%include <std_unordered_map.i>

typedef std::unordered_map<std::string,std::string>    StrUnOrdMap_t;
%template(StrUnOrdMap_t)    unordered_map<std::string,std::string>;

typedef std::unordered_map<std::string,StrUnOrdMap_t> instToNet_t;
%template(instToNet_t)  unordered_map<std::string,StrUnOrdMap_t>;

typedef std::unordered_map<std::string,instToNet_t> portToInstToNet_t;
%template(portToInstToNet_t)  unordered_map<std::string,instToNet_t>;

typedef std::unordered_map<std::string,portToInstToNet_t> cellToPortToInstNet_t;
%template(cellToPortToInstNet_t)  unordered_map<std::string,portToInstToNet_t>;


The swig command I use is ...
Swig -c++ -perl    myinterface.i

And the created wrap.cxx compiles fine.


I have a c++ func to attempt to get the top level of the structure

  cellToPortToInstNet_t            getCellPortMap() { return m_CellPortMap;}

and attempt to run it in the perl from ....

my $cellPortMap = $gvFile->getCellPortMap();

while there are no error messages,    and everything compiles ok..
the returned perl structure is empty.

I then attempted to add a helper (?) function   in the interface file.


%{
  cellToPortToInstNet_t getCellPortMap();
%}


But that doesn't seem to help.

The returned structure is perl is empty (although I know it has the right contents in the c++)

So.. a couple of questions.

Is this likely to work ?   (multilevel unordered_maps?)
Any recommendations to fix the issues. ?

Thanks again for any help

Richard

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