If I nest macro calls such as:

namespace SomeNamespace
{
   BOOST_SERIALIZATION_ASSUME_ABSTRACT(SomeClass)
   BOOST_CLASS_TYPE_INFO(SomeClass, extended_type_info_no_rtti<SomeClass>)
   BOOST_CLASS_EXPORT(SomeClass)
}

inside the namespace containing the type I get a TON of compiler errors. The wackiest is that the compiler thinks boost is a namespace inside of my namespace. Things improve (not fully tested) if I move the macros outside of my namespace and qualify the type with namespace name:

BOOST_SERIALIZATION_ASSUME_ABSTRACT(SomeNamespace::SomeClass)
BOOST_CLASS_TYPE_INFO(SomeNamespace::SomeClass, extended_type_info_no_rtti<SomeNamespace::SomeClass>)
BOOST_CLASS_EXPORT(SomeNamespace::SomeClass)

Can someone explain please?

Thanks