Re: [Boost-users] [serialization] transparently treating a class like a built-in type

Zitat von Kenneth Riddile :

I have some xml archives that store a lot of floating point values. I would like to read these into a program that is designed to easily switch between using floats and a custom fixed-point type via a typedef. The way that would be easiest would be to add a serialize() method to the fixed-point class definition. However, the xml archive requires that I use an nvp wrapper. Since the data was originally serialized out as plain floats, the data looks something like this:

<x>0.95260203</x> <y>0.87517798</y> <z>0.54323343</z>

I'm not sure if it was intended to be used that way, but you could use Boost.Serialization's versioning. namespace serialization{ struct version : mpl::integral_c{}; } void load(Archive &ar,unsigned int version){ if(version == 0) load fixed point... else load floating point... ...into whatever type is currently typedef'ed } wrt to your "value" "indirection", just load the float directly, or if that's not an option because of encapsulation use a temporary and initialize "x" later on. ar >> make_nvp("x",x.value); instead of ar & NVP(x);