Re: [Cppcms-users] Serialization usage

[Artyom B. <art...@ya...>]

Because std::string isn't Plain Old Object - it has constructor/destructor etc. You can't serialize it as POD you need to serialize all its members independently
 
Artyom Beilis 
-------------- 
CppCMS - C++ Web Framework:   http://cppcms.com/ 
CppDB - C++ SQL Connectivity: http://cppcms.com/sql/cppdb/


>________________________________
> From: CN <cn...@fa...>
>To: cpp...@li... 
>Sent: Friday, June 27, 2014 1:03 PM
>Subject: [Cppcms-users] Serialization usage
> 
>
>I feel this code has little difference from the bundled example, but it
>yields garbage. Any idea why?
>----------------------
>#include <cppcms/serialization.h>
>#include <cppcms/application.h>
>#include <cppcms/cache_interface.h>
>#include <cppcms/session_interface.h>
>#include <iostream>
>struct person
>{
>    std::string id;
>    std::string name;
>    std::string address;
>};
>
>struct serializable_person : public cppcms::serializable
>{
>    person p;
>    void serialize(cppcms::archive &a){
>        a & cppcms::as_pod(p);
>    }
>};
>
>struct serializable_v : public cppcms::serializable
>{
>    std::vector<serializable_person> many;
>    void serialize(cppcms::archive &a){
>        a & many;
>    }
>};
>
>int main(int argc,char **argv)
>{
>    serializable_v obj;
>
>    obj.many.push_back(serializable_person());
>    person &p=obj.many.back().p;
>    p.id="1"; p.name="John"; p.address="here";
>
>    obj.many.push_back(serializable_person());
>    person &p1=obj.many.back().p;
>    p1.id="1"; p1.name="John"; p1.address="here";
>
>    cppcms::archive a;
>    obj.save(a);
>    std::cout << a.str(); //garbage
>    return 0;
>}
>
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