In Isabelle2020, when isabelle jedit is started without a session
context, e.g. `isabelle jedit -l ASpec`, theory imports with path
references cause the isabelle process to hang.
Since sessions now declare directories, Isabelle can find those files
without path reference and we therefore remove all such path references
from import statements. With this, `jedit` and `build` should work with
and without explicit session context as before.
Signed-off-by: Gerwin Klein <gerwin.klein@data61.csiro.au>
Session-qualified imports will be required for Isabelle2018 and help clarify
the structure of sessions in the build tree.
This commit mainly adds a new set of sessions for lib/, including a Lib
session that includes most theories in lib/ and a few separate sessions for
parts that have dependencies beyond CParser or are separate AFP sessions.
The group "lib" collects all lib/ sessions.
As a consequence, other theories should use lib/ theories by session name,
not by path, which in turns means spec and proof sessions should also refer
to each other by session name, not path, to avoid duplicate theory errors in
theory merges later.
Show that there is a measure on vs_refs, on which vs_lookup_pages1 is
strictly monotonically increasing.
We also prove various lemmas relating vs_lookup and vs_lookup_pages, and
valid_arch_objs.
There are many things previously proved in ArchRetype_AI and
ArchDetype_AI that are now broken because Xin's work overwrote some
things I also proved in ArchVSpace_AI. I'm not fixing them here.
Gerwin Klein
Corey Lewis
Miki Tanaka
Matthew Brecknell
Xin,Gao