Generate fast XS accessors without run-time compilation
Description
Class::XSAccessor implements fast read, write and read/write accessors in XS. Additionally, it can
provide predicates such as has_foo() for testing whether the attribute foo is defined in the object.
It only works with objects that are implemented as ordinary hashes. Class::XSAccessor::Array
implements the same interface for objects that use arrays for their internal representation.
