If people wanting to store these “uninteresting” theorems are happy to wrap and
unwrap the OMITs, this would be one approach.
I had been thinking of adding a
save_private_thm(name, privatedbname, thm)
entrypoint to Theory.sml. You’d want multiple possible “private dbs”, so there
would be an entry-point along the lines of
get_private_db : string -> (string,thm) Binarymap.dict
Every time a theory was loaded, this private_db would change, so in many
applications it might not be appropriate to store the result of
get_private_db “cakeml/translator”
but to instead write
val th = Binarymap.peek(get_private_db “cakeml/translator”, “theorem-name”)
Michael
On 16/1/18, 18:35, "Magnus Myreen" <myr...@chalmers.se> wrote:
Hi all,
How about defining:
OMIT x = x
in markerScript.sml and making it print as ... and adjust HOL so that
a theorem with a top-level OMIT does not show up in DB searches.
Cheers,
Magnus
On 12 January 2018 at 00:00, <michael.norr...@data61.csiro.au> wrote:
> I was thinking along these lines, yeah. Such theorems could also be
stopped from appearing in the Theory.sig file.
>
> Michael
>
> On 12/1/18, 07:31, "Konrad Slind" <konrad.sl...@gmail.com> wrote:
>
> Theorems that need to persist between sessions are most easily stored
by name
> in theories. Maybe some kind of PolyML database magic could also be
> used, I don't
> know. As far as DB searches, it wouldn't be hard to implement a
> refined DB search
> mechanism that first discarded all theorems that met some kind of
> naming convention
> (e.g., those starting with an underscore or something like that) and
> then did the usual
> search (which can be on name fragment or pattern).
>
> Konrad.
>
>
> On Wed, Jan 10, 2018 at 7:09 PM, Magnus Myreen <myr...@chalmers.se>
wrote:
> > Ah, I didn't realise this existed. Thanks for the pointers!
> >
> > How does storing of theorems work in this setting? One can't
construct
> > a theorem from a string in a decode function.
> >
> > I guess the string could refer to a theorem name that's stored in
the
> > theory, but this is a bit inconvenient because some of the theorems
in
> > the translator's state are currently not stored in the theory (other
> > than in the automatically produced theorem that is an encoding of
the
> > entire state). I guess an encode function could invent an unused
name
> > and store the theorem while it's producing the encoding. This can
lead
> > to some strange things turning up in DB searches (as is the case
with
> > the current approach).
> >
> > Cheers,
> > Magnus
> >
> >
> > On 11 January 2018 at 11:24, <michael.norr...@data61.csiro.au>
wrote:
> >> That level of generality is already possible, and has always been
a desideratum for the design. (The grammar update information stored is about
that complicated for example; consider the types that occur in a call to
add_rule.)
> >>
> >> The painful part is that you have to write functions to encode and
decode the types into and out of strings (because these strings are written
into the theory files). There are functions for doing basic SML types in
src/parse/Coding, and the handling of terms is handled by writing functions
that take functions for doing this as parameters. See the bottom of
src/parse/term_grammar for the encoding and decoding, and
src/parse/GrammarDeltas for the way this is put together for the grammar
example.
> >>
> >> You can see the fundamental building blocks at the LoadableThyData
structure in src/postkernel/Theory.
> >>
> >> Certainly, providing a method for going through a generic
s-expression type might be easiest for users to understand, so perhaps I can
build that as well as term lists.
> >>
> >> Michael
> >>
> >> On 11/1/18, 11:08, "Magnus Myreen" <myr...@chalmers.se> wrote:
> >>
> >> Hi Michael,
> >>
> >> I see that you are considering to add a TermSetData feature.
Could you
> >> please add something more general? I'd appreciate a feature
that can
> >> store the CakeML translator's state in theories. Currently,
the CakeML
> >> translator stores its state in a single theorem so that the
other
> >> theories can load the state and continue from previous states.
> >>
> >> As far as I can tell, the ThmSetData machinery (and probably
the
> >> TermSetData equivalent) won't help with the translator. The
reason is
> >> that the translator's state is a collection of lists of list
of tuples
> >> of combinations of strings, type, terms and theorems.
> >>
> >> The current approach encodes all of these structures into a
single
> >> unreadable theorem. This works but it seems a bit ad hoc and
causes
> >> huge unreadable theorems to pop up in various DB searches.
> >>
> >> Suggestion: could we have a way to store a s-expression-like
data into
> >> theories? If the s-expressions would allow strings, types,
terms,
> >> theorems and, of course, pairs/lists of s-expressions, then I
think
> >> the translator's state could very naturally be stored in
theories.
> >>
> >> Cheers,
> >> Magnus
> >>
> >> > There is generic machinery for adding values of various
forms to theories so
> >> > that future theories and ML code can see them. The
smoothest instantiation
> >> > is in ThmSetData (in src/1) which allows storage of sets of
theorems in a
> >> > “2D matrix” indexed by theory-name and set-name. For
example, the automatic
> >> > rewrites behind the “simp” attribute are implemented this
way.
> >> >
> >> > The storage of grammar updates is handled with the same
technology.
> >> >
> >> > A hacky way to store terms would be to use theorems with
conclusions of the
> >> > form
> >> >
> >> > K T (myterm)
> >> >
> >> > and to then use ThmSetData.
> >> >
> >> > A better way, which, now that I’ve been prodded, I may
implement soon, would
> >> > be to write a TermSetData.
> >> >
> >> > I hope this helps. I’m happy to discuss the details of this
relatively
> >> > undocumented feature further if you want more help.
> >> >
> >> > Best wishes,
> >> > Michael
> >> >
> >> > On 11/1/18, 01:51, "Heiko Becker" <hbec...@mpi-sws.org>
wrote:
> >> >
> >> > Hello everyone,
> >> >
> >> > suppose I have a custom tactic that depends on a list of
terms and I
> >> > want to keep adding elements to the list throughout my
development.
> >> > I tried to achieve this using a :term list ref on the ML
level. However,
> >> > it is the case that if I add some term in theory A and
inspect the list
> >> > in theory B, where A is in the theory graph before B,
all elements added
> >> > in A are not in the list anymore.
> >> >
> >> > Can someone give me a hint on why this is the case or
tell me a better
> >> > way to "share" a list of terms from a theory with
theories depending on
> >> > it?
> >> >
> >> > Cheers,
> >> >
> >> > Heiko
> >> >
> >> >
> >> >
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