升压系列化：档案＆QUOT;不受支持的版本＆QUOT;例外 [英] Boost serialization: archive "unsupported version" exception

问题描述

Iv'e得到了这个异常，当我尝试通过文本反序列化存档的一些数据$ P $与提升的版本上连载pviously（1.46序列化和1.38反序列化）...有没有办法降级（在code）序列化？像set_library_version？谢谢...

Iv'e got this exception when I try to deserialize through a text archive some data previously serialized with a upper version of boost (1.46 to serialize and 1.38 to deserialize)...is there a way to downgrade (in the code) the serialization?something like "set_library_version"?thanks...

推荐答案

请参见错误读取二进制档案，由老提振版本创建的电​​子邮件存档有关序列化的错误。

See Error read binary archive, created by old boost version mail archive about serialization error.

它说，下面的code做这项工作。

It says that the code below does the job

void load_override(version_type & t, int version){
        library_version_type lvt = this->get_library_version();
        if(boost::archive::library_version_type(7) < lvt){
            this->detail_common_iarchive::load_override(t, version);
        }
        else
        if(boost::archive::library_version_type(6) < lvt){
            uint_least16_t x=0;
            * this->This() >> x;
            t = boost::archive::version_type(x);
        }
        else
        if(boost::archive::library_version_type(3) == lvt || boost::archive::library_version_type(5) == lvt ){
#pragma message( "CTMS fix for serialization bug ( lack of backwards compatability ) introduced by boost 1.45." )
            // upto 255 versions
            unsigned char x=0;
            * this->This() >> x;
            t = version_type(x);
        }
        else{
            unsigned int x=0;
            * this->This() >> x;
            t = boost::archive::version_type(x);
        }
    }

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