Having trouble serializing a priority queue

[John Lagerquist]

I am having trouble serializing a priority queue.  I get the "could not find any serialization functions..." error, although I have included types\queue.hpp.  Any advice on how to fix this is appreciated.

#include <cereal\types\queue.hpp>


...
namespace sys
{
class base
{
protected:
   unsigned priority__power_distribution;

   struct pless : public std::binary_function<std::shared_ptr<sys::base>, std::shared_ptr<sys::base>, bool>
   {
 bool operator()(std::shared_ptr<sys::base> x, std::shared_ptr<sys::base> y) const
 {
 return std::less<unsigned>()(x->priority__power_distribution, y->priority__power_distribution);
 }
   };

   std::priority_queue<std::shared_ptr<sys::base>, std::vector<std::shared_ptr<sys::base>>, pless> sub_list;

   friend class cereal::access;
   template<class archive>

   void serialize(archive &arch)
   {
       arch(CEREAL_NVP(sub_list));
   }
};

[w.shan...@gmail.com]

Are you including support for vector and shared_ptr as well? Can you post the code where you perform the actual serialization?

[John Lagerquist]

I currently serialize some vectors and shared_ptr's and it all works fine, it's just the priority_queue that's giving me problems.

Here are my includes:

#include <string>

#include <queue>

#include <cereal\cereal.hpp>

#include <cereal\types\polymorphic.hpp>

#include <cereal\types\queue.hpp>

#include <cereal\archives\portable_binary.hpp>

#include <cereal\archives\json.hpp>

Here is the serialization code:

shared_ptr<sys::base> reactor = make_shared<sys::base>();

shared_ptr<sys::base> battery = make_shared<sys::base>);

 ofstream os("cereal.json");
 {
    cereal::JSONOutputArchive oa(os);
    oa(reactor, battery);
 }
 os.close();

[John Lagerquist]

Here's a simpler example that exhibits the problem:

#include <queue>

#include <fstream>

#include <cereal\types\queue.hpp>

#include <cereal\archives\json.hpp>

using namespace std;

struct

{

priority_queue<int> pq;

template<class archive>

void serialize(archive &arch)

{

arch(CEREAL_NVP(pq));

}

} test;

void main(void)

{

ofstream os("cereal.json");

{

cereal::JSONOutputArchive oa(os);

oa(test);

}

os.close();

}

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John Lagerquist

Chief Engineer

RallyTronics LLC

801-866-5981

[w.shan...@gmail.com]

I'm able to reproduce this with a simple int priority queue. I'll open an issue on github for this: https://github.com/USCiLab/cereal/issues/264

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[John Lagerquist]

Thanks for your help.

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--

John Lagerquist

Chief Engineer

RallyTronics LLC

801-866-5981

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