mosesdecoder/search/context.hh

#ifndef SEARCH_CONTEXT__
#define SEARCH_CONTEXT__

#include "search/config.hh"
#include "search/vertex.hh"

#include <boost/pool/object_pool.hpp>

namespace search {

class ContextBase {
  public:
    explicit ContextBase(const Config &config) : config_(config) {}

    VertexNode *NewVertexNode() {
      VertexNode *ret = vertex_node_pool_.construct();
      assert(ret);
      return ret;
    }

    void DeleteVertexNode(VertexNode *node) {
      vertex_node_pool_.destroy(node);
    }

    unsigned int PopLimit() const { return config_.PopLimit(); }

    Score LMWeight() const { return config_.LMWeight(); }

    const Config &GetConfig() const { return config_; }

  private:
    boost::object_pool<VertexNode> vertex_node_pool_;

    Config config_;
};

template <class Model> class Context : public ContextBase {
  public:
    Context(const Config &config, const Model &model) : ContextBase(config), model_(model) {}

    const Model &LanguageModel() const { return model_; }

  private:
    const Model &model_;
};

} // namespace search

#endif // SEARCH_CONTEXT__