Am 17.05.2012 01:30, schrieb ArtemGr:
> Tommi,
>
> sometimes it is useful to access JSON or XML fields
> without a dedicated serialization structure.
> SerializationInfo is convenient for that, but I don't see a way
> to use it outside of serialization:
> when I use cxxtools::xml::XmlDeserializer::si or
> cxxtools::xml::XmlDeserializer::current the application crashes.
>
> I have found a workaround using C++ lambdas:
>
> struct FunctionOverSerializationInfo {
> std::function<void (const cxxtools::SerializationInfo&)> _fun;
> FunctionOverSerializationInfo (std::function<void (const
> cxxtools::SerializationInfo&)> fun): _fun (fun) {}
> };
> void operator>>= (const cxxtools::SerializationInfo& si,
> FunctionOverSerializationInfo fosi) {
> fosi._fun (si);
> }
>
> std::ifstream is ("file");
> cxxtools::xml::XmlDeserializer ds (is);
> FunctionOverSerializationInfo dsFun (
> [&](const cxxtools::SerializationInfo& si) {
> // Use `si` there.
> }
> );
> ds.toObject (is, dsFun);
>
> But is there a more direct way of using SerializationInfo
> outside of object deserialization?
>
There is a deserialization operator for SerializationInfo for that. So
you can write:
cxxtools::xml::XmlDeserializer d(std::cin);
cxxtools::SerializationInfo si;
d.deserialize(si);
The you have the data from the read xml file in the si object.
Tommi
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