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This avoids all the side effects associated with the manipulation of an
unresolvable flag. In the new design:
- The evar_map stores a set of evars that are candidates for typeclass
resolution, which can be retrieved and set.
We maintain the invariant that it always contains only undefined
evars.
- At the creation time of an evar (new_evar), we classify it as a
potential candidate of resolution.
- This uses a hook to test if the conclusion ends in a typeclass
application. (hook set in typeclasses.ml)
- This is an approximation if the conclusion is an existential (i.e.
not yet determined). In that case we register the evar as
potentially a typeclass instance, and later phases must consider
that case, dropping the evar if it is not a typeclass.
- One can pass the ~typeclass_candidate:false flag to new_evar to
prevent classification entirely. Typically this is for new goals
which should not ever be considered to be typeclass resolution
candidates.
- One can mark a subset of evars unresolvable later if
needed. Typically for clausenv, and marking future goals as
unresolvable even if they are typeclass goals. For clausenv for
example, after turing metas into evars we first (optionally) try a
typeclass resolution on the newly created evars and only then mark
the remaining newly created evars as subgoals. The intent of the
code looks clearer now.
This should prevent keeping testing if undefined evars are classes
all the time and crawling large sets when no typeclasses are present.
- Typeclass candidate evars stay candidates through
restriction/evar-evar solutions.
- Evd.add uses ~typeclass_candidate:false to avoid recomputing if the new
evar is a candidate. There's a deficiency in the API, in most use
cases of Evd.add we should rather use a:
`Evd.update_evar_info : evar_map -> Evar.t -> (evar_info -> evar_info)
-> evar_map`
Usually it is only about nf_evar'ing the evar_info's contents, which
doesn't change the evar candidate status.
- Typeclass resolution can now handle the set of candidates
functionally: it always starts from the set of candidates (and not the
whole undefined_map) and a filter on it, potentially splitting it in
connected components, does proof search for each component in an
evar_map with an empty set of typeclass evars (allowing clean
reentrancy), then reinstates the potential remaining unsolved
components and filtered out typeclass evars at the end of
resolution.
This means no more marking of resolvability/unresolvability
everywhere, and hopefully a more efficient implementation in general.
- This is on top of the cleanup of evar_info's currently but can
be made independent.
[typeclasses] Fix cases.ml: none of the new_evars should be typeclass candidates
Solve bug in inheritance of flags in evar-evar solutions.
Renaming unresolvable to typeclass_candidate (positive) and fix maybe_typeclass_hook
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entries
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gtk_scrolled_window_add_with_viewport)
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I looked for this information and forgot about it a couple times so
let's put it in writing.
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The `Undo` command is not reliable.
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and a binder
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We need to update in Docker:
- dune to 1.4.0: as it honors `-p` on test stanzas
- dune-release to 1.1.0: support for OPAM 2.0 + fixes
This makes `dune-release distrib` / `dune-release opam pkg` work.
TODO: we need to figure out what is going on with the
versioning. Should we do `dune subst` on `pinned`?
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When opening the query pane, do not try to focus on a query tab that no
longer exists.
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Gtk complains that we are not using gtk_scrolled_window_add_with_viewport,
so let us do.
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missing
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As noted by Gäetan, we didn't compile these. We also provide a recipe
to run `ocamldebug`. Try (after a build):
```
dune exec dev/dune-dbg
(ocd) source dune_db
```
or
```
dune exec dev/dune-dbg checker
(ocd) source checker_dune_db
```
for the checker.
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We make `config` into a properly library. This is more uniform and
useful for some clients. This also matches what was done in Dune.
Next step would be to push dependencies on `Coq_config` upwards, only
the actual toplevel binaries should depend on it.
We also remove the stale `camlp5.dbg` and refactor the dbg files a
bit, isolating the bits that are specific to the plugin / lib building
method used by makefile.
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This includes many changes, please have a look at the newly generated
docs.
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