now builds for me on Debian-7 Wheezy 64bit
unqualified member functions in dependent base classes not found anymore.
Need to qualify either the class or the instance.
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.
time handling is part of the library, while this
convenience shortcut relies on the Advice system,
which resides in the application lib.
To allow this kind of symbolic acces to a grid
entity defined "elesewhere", client code needs
to be linked against liblumieracore.so
especially this allows to use the Advice system
or the query resolvers from within library facilities
to refer to other implementation level services by name
implemented as extension to the linear combinations.
I decided to use the same "always floor" rule
as employed for time quantisation. Moreover,
we don't support floating point, only rationals
benefits of using a newer compiler, yay!
Explanation: the Link<...> template combines
various policy templates and exposes a set
of functions, which can be bound as functor
into an concrete time::Control instance.
Actually, we need to mix in only the Mutation
baseclass, because we just want to inherit
the privilege to change time values, which
are otherwise immutable. We don't need to
mix in the Mutator template anymore (this
was a leftover from an earlier design)
removed that inheritance relation; it was a typical
example of abusing inheritance and violated the
Liscov substitution principle. It is sufficient
to allow promotion of an offset into a Duration.
Note: Duration is the time metric
Note: it's rather arbitrary choosen,
because any time grid can define its own origin.
You must not assume that the origin of any time axis
is located at Time::ZERO !!
