The syntax OR for nondeterministic choice between two executions now
conflicts with the OR bit operation from the Isabelle distribution.
Since it was almost unused anyway, we remove it entirely and use only
the \<sqinter> symbol instead.
Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems>
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.
These theories supply the interference trace monad with a useful notion of
simulation/refinement, which could be used to prove functional correctness
(similar to corres) in the presence of concurrency.
Corey Lewis
Gerwin Klein
Gerwin Klein
Michael McInerney
Thomas Sewell