[#AsBase-0af]
= AsBase
:mrdocs:

Convert any argument to a reference to X, maintaining constness.

== Synopsis

Declared in `<serialize.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class Out,
    class In>
Out&
AsBase(In& x);
----

== Description

This can be used in serialization code to invoke a base class's serialization routines.

Example use: class Base { ... }; class Child : public Base { int m_data; public: SERIALIZE_METHODS(Child, obj) { READWRITE(AsBase<Base>(obj), obj.m_data); } };

static_cast cannot easily be used here, as the type of Obj will be const Child& during serialization and Child& during deserialization. AsBase will convert to const Base& and Base& appropriately.

== Return Value

A reference to x typed as the base class Out.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *x*
| The derived object to view as its base class.
|===


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