c++ - Able to serialize with boost but unable to deserialize std::shared_ptr -


boost serialization

namespace boost {     namespace serialization {      template <class archive, class t>     inline void save         (archive &archive,          const std::shared_ptr<t> subtree,           const unsigned int file_version)     {         // raw pointer has saved         const t *const  subtree_x = subtree.get();          archive << subtree_x;     }      template <class archive, class t>     inline void load         (archive &archive,          std::shared_ptr<t> subtree,          const unsigned int file_version)     {          t *p_subtree;          archive >> p_subtree;          #if boost_workaround(boost_dinkumware_stdlib, == 1)             subtree.release();             subtree = std::shared_ptr< t >(p_subtree);         #else             subtree.reset(p_subtree);         #endif     }      template <class archive, class t>     inline void serialize         (archive &archive,          std::shared_ptr<t> subtree,  // no const or else compile-time error         const unsigned int file_version)     {         boost::serialization::split_free(archive, subtree, file_version);     }    } // namespace serialization } // namespace boost

tree class

class tree{  private:  class treenode{  public:       std::shared_ptr<treenode> node_factory(const t &new_key, const long &new_index)     {         return std::shared_ptr<treenode>(new treenode(new_key, new_index));      }      friend class tree;  private:      friend class boost::serialization::access;     template<class archive>     void serialize(archive &archive, const unsigned int /* file_version */){         archive & key;         archive & index;         archive & left;         archive & right;     }      t key;     long index;      std::shared_ptr<treenode> left;     std::shared_ptr<treenode> right;  };  // end tree node class definition  friend class boost::serialization::access; template <class archive> void serialize(archive &archive, const unsigned int version){     archive & root; }  };

writer

bool save(std::shared_ptr<tree> &tree, const std::string &search_tree_file_name) {     // create , open binary archive output     std::ofstream writer(search_tree_file_name, std::ofstream::out | std::ofstream::binary);      if(writer){         boost::archive::binary_oarchive serial_writer(writer);         //set_flags(0, true);         // write class instance archive         serial_writer << *tree;         // archive , stream closed when destructors called      }else if(writer.fail()){         writer.clear();     }     return true; }

reader

enter code here bool load(std::shared_ptr<tree> &tree, const std::string &search_tree_file_name) {     // create , open binary archive output     std::ifstream reader(search_tree_file_name, std::ifstream::in | std::ifstream::binary);      if(reader){         boost::archive::binary_iarchive serial_reader(reader);         // read class state archive         serial_reader >> *tree;         // archive , stream closed when destructors called      }else if(reader.fail()){         reader.clear();     }      return true; }

i have written , verified successful serialization file fail deserialize , usable object.

whether writing in text or binary, can verify serialized output correct but, reason, serialize output not deserialize , left empty object when loading.

have @ these links, might provide clue. http://www.boost.org/doc/libs/1_49_0/libs/serialization/doc/shared_ptr.html & http://www.boost.org/doc/libs/1_49_0/libs/serialization/doc/shared_ptr2.html


Comments

Post a Comment

Popular posts from this blog

node.js - Bad Request - node js ajax post -

i'm using express 3.0 , node v0.11.0. have button submits form , i'm using ajax post data json object node server. client code is: $('#contact').submit(function(e) { console.log('submit called'); var formdata = json.stringify($('form').serializeobject()); console.log(formdata); $.ajax({ url: "http://localhost:3000/savedata/", type: "post", datatype: 'json', data: {objectdata: formdata}, contenttype: "application/json", complete: function() { console.log('process complete'); }, success: function(data) { console.log('process sucess'); }, error: function() { console.log('process error'); }, }); return false; }); then on server: var express = require('express'); var app = express(); app.set('views', __dirname + '/views'); app.set('view engine', 'jade'); app.use(express.bodyparser());...
Read more

Why does Ruby on Rails generate add a blank line to the end of a file? -

running rails generate controller foo home results in: class foocontroller < application controller def home end end (there's nothing on line in actual file, blank line) is there purpose blank line? it's common use newline indicate end of line, last line. many editors (like vi, use) add in newline silently. consensus text files (especially in unix world) should end in newline, , there have been problems historically if wasn't present. why should text files end newline? the tool used count lines in file "wc" counts newlines in file, without trailing newline show 3 instead of 4. it improves readability of templates used in generator. consider: https://github.com/rails/rails/blob/master/railties/lib/rails/generators/rails/controller/templates/controller.rb to remove trailing newline, template have last line of: end<% end -%> instead of: end <% end -%> that seems less readable me. the discussion below refers ...
Read more

keyboard - Smiles and long press feature in Android -

i've created android keyboard. how add features inserting smilies, , using long keypresses display symbols? to create long-press behavior allows select several options pop-up menu, follow guide (specifically pop-up menu section): http://developer.android.com/guide/topics/ui/menus.html smileys (also known emoticons) combination of keys, understood programs , parsed same way. have do, when clicks smiley face on keyboard, simulate pressing of key combination matching emoticon. example, when clicks smiley, should simulate key presses ':' , ')' :). here's list of emoticons: http://en.wikipedia.org/wiki/list_of_emoticons
Read more