The old implementation relied on two layered APIs:
one for the client and one for the implementer of
the Allocation state. This is logically sound, yet
clumsy in terms of design, since the internal API
turns out to be void of actual meaning.
It seems possible to eliminate this confusing structure
by a clear separation of ''implementation realms''
* the ''mechanics'' of connection state management
* the actual implementation of the connection
The first can be provided as generic template subclass,
while the latter should be confined entirely into the
implementation of the `Connection` interface.
Doing so requires to keep each part of the implementation
strictly focused onto its purpose — something I obviously
was not able to see at the time when writing this old
implementation, notably because I was completely guided
and driven by the test/dummy implementation without
considering how an actual implementation of
low-level data output would work.
This resolves a long-standing issue:
we could not use proper include paths for test-helper code that was defined alongside the tests.
Since some test-helper code must now be relocated into the »Vault«-Layer,
I took the opportunity to finally resolve this annoyance. The solution is two-fold
* introduce a dedicated test-support library
* remove the quirks that were necessary to support some plain-C tests
Together, this allows to raise the include-directory by one level,
and then to adjust all folder names so that they match the namespace
the buildsystem will now pick up and link
all test cases according to the layer, e.g.
backend tests will automatically be linked
against the backend + library solely.
funny enough this possible memory corruption
didn't happen in the unit test, because my
compiler optimised the additional int field
of class SubDummy, making it the same size
of the baseclass. Now matters should be safe.
this turns out to be the typical usage scenario
for ScopedCollection: a manager object owning
the collection will populate it with specially
crafted components and invoke a member function
for creating the individual components.
This shortcut avoids using tr1::bind alltogether
