tree d50bebf3bb723f7e2ec987f37e03bf90815d654b
parent 3d472e345530429bd8af6170a6ff2db1e0e6c642
author martin f. krafft <madduck@madduck.net> 1375884113 +0200
committer martin f. krafft <madduck@madduck.net> 1375886193 +0200

Implement Parameter interpolation

Parameters can now reference each other, and resolution happens in
topological order. This is done in two steps: while merging already
walks the entire dictionary, a list of references and their occurrences
is kept. After merging is complete, interpolate() is called on the
instance, which recursively resolves the references found during
merging. If a referenced value itself contains other references, those
are resolved first (which is the topological ordering).

Signed-off-by: martin f. krafft <madduck@madduck.net>