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PR #13183 introduced quite a bit of duplicate code, we refactor it and
expose less internals on the way. That should make the API more
robust.
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The syntax is the one of boolean attributes, that is to say
`#[typing($flag={yes,no}]` where `$flag` is one of `guarded`,
`universes`, `positive`.
We had to instrument the pretyper in a few places, it is interesting
that it is doing so many checks.
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Became unused in e034b4090ca45410853db60ae2a5d2f220b48792
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This is to be removed once #12920 is merged.
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We unify information about constants so it is shared among all the
paths [interactive, NI, obligations].
IMHO the current setup looks pretty good, with information split into
a per-constant record `CInfo.t` and variables affecting mutual
definitions at once, which live in `Info.t`.
Main information outside our `Info` record is `opaque`, which is
provided at different moments in several cases.
There are a few nits regarding interactive proofs, which will go away
in the next commits.
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When declaring a lemma, the code path is quite different depending on
whether the lemma is inferred to be a mutually-defined lemma or not.
We refactor the code path in declare to reflect that; this will allow
to better organize constant information and to reuse the `Recthm.t`
type in particular.
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This is in preparation for the next commit which will clean-up the
current API flow in `Declare`.
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This improves the interface, and allows even more sealing of the API.
This is yet work in progress.
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We move the advanced proof initialization routine to Declare, and stop
exposing implementation internals in `Info.t` constructor.
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At this point the record in lemmas was just a stub; next commit will
stop exposing the internals of mutual information, and pave the way
for the refactoring of `Info.t` handling in the Declare interface.
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This is not needed outside of `Declare` now.
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Reviewed-by: Matafou
Reviewed-by: SkySkimmer
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The API in `DeclareDef` should become the recommended API in `Declare`.
This greatly reduces the exposure of internals; we still have a large
offender in `Lemmas` but that will be taken care of in the next
commit; effectively removing quite some chunks from `declare.mli`.
This PR originally introduced a dependency cycle due to:
- `Declare`: uses `Vernacexpr.decl_notation list`
- `Vernacexpr`: uses `ComHint.hint_expr`
- `ComHint`: uses `Declare.declare_constant`
This is a real cycle in the sense that `ComHint` would have also move
to `DeclareDef` in the medium term.
There were quite a few ways to solve it, we have chosen to
move the hints ast to `Vernacexpr` as it is not very invasive
and seems consistent with the current style.
Alternatives, which could be considered at a later stage are for
example moving the notations AST to `Metasyntax`, having `Declare` not
to depend on `Vernacexpr` [which seems actually a good thing to do in
the medium term], reworking notation support more deeply...
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remove itself in the set of elements bigger than it if it is indeed
the case.
This does not impact the warning issued when the recursivity is not
mutual but this produces a result consistent with the unary case when
the order is reflexive (i.e. results of the form (x,Inr[x,y]) happens
also in the mutual case to indicate a cycle x<=y<=x while before we
had results of the form (x,Inr[x]) only in the unary case). I.e.:
Before:
(x,[y]),(y,[x]) -> (x,Inr[]),(y,Inl x)
(x,[x]) -> (x,Inr[x])
Now:
(x,[y]),(y,[x]) -> (x,Inr[x]),(y,Inl x)
(x,[x]) -> (x,Inr[x])
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Co-authored-by: Jasper Hugunin <jasper@hugunin.net>
Co-authored-by: Gaëtan Gilbert <gaetan.gilbert@skyskimmer.net>
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We move `Recthm` to `DeclareDef` so it is shared by interactive and
direct fixpoint declaration.
This is the last step before unifying both paths.
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Note that we had to introduce a `restrict_ucontext` parameter to be
faithful to the implementation in obligations, however this looks like
a bug.
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First commit of a series that will unify (and enforce) the handling of
mutual constants. We will split this in several commits as to easy
debugging / bisect in case of problems.
In this first commit, we move the actual declare logic to a common
place.
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Most of the parameters were named, we fix the remaining cases.
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Add headers to a few files which were missing them.
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In preparation for the introduction of an opaque mutual definition
type at the `Declare` level we remove the not very useful wrapper
`declare_fix`.
Now we should be ready to profit from `DeclareDef` and its handling of
common stuff such as `restrict_universe_context` and `check_univ_decl`
etc...
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We split the paths for mutual / non-mutual constants, and we enforce
some further invariants, in particular we avoid messing around with
the body of saved constants, and using the indirect accessor.
This should be almost semantically equivalent to the previous code,
including some questionable choices present there.
In further cleanups we will move this code to Declare, which should
hopefully help clarify some of the semantics.
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This lets us remove the passing around of "status" in comassumption
and generally makes highlighting axiom adding lines in coqide more
reliable as there's no need for per-command code.
If a command adds multiple axioms it will emit AddedAxiom multiple
times, this doesn't seem to be a problem though.
We may wonder if "Fail Fail Axiom" should be highlighted as
"Axiom" (both before and after this commit it is).
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We continue over the previous commit and remove redundant
`structured_fixpoint_expr` record in favor of the one used in the AST.
This removes some term-shuffling, tho we still have discrepancies
related to adjustments on the recursive annotation.
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We turn the tuples used for (co)-fixpoints into records, cleaning up
their users.
More cleanup is be possible, in particular a few functions can now
shared among co and fixpoints, also `structured_fixpoint_expr` could
like be folded into the new record.
Feedback on the naming of the records fields is welcome.
This is a step towards cleaning up code in `funind`, as it is the main
consumer of this data structure, as it does quite a bit of fixpoint
manipulation.
cc: #6019
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We can use logical kind for the same purpose, which is mainly
dumpglob, so `goal_object_kind` was never matched against, making this
transformation safe.
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We move the bulk of `Decl_kinds` to a better place [namely
`interp/decls`] and refactor the use of this information quite a bit.
The information seems to be used almost only for `Dumpglob`, so it
certainly should end there to achieve a cleaner core.
Note the previous commits, as well as the annotations regarding the
dubious use of the "variable" data managed by the `Decls` file.
IMO this needs more work, but this should be a good start.
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We split `{goal,declaration,assumption}_kind` into their
components. This makes sense as each part of this triple is handled by
a different layer, namely:
- `polymorphic` status: necessary for the lower engine layers;
- `locality`: only used in `vernac` top-level constants
- `kind`: merely used for cosmetic purposes [could indeed be removed /
pushed upwards]
We also profit from this refactoring to add some named parameters to
the top-level definition API which is quite parameter-hungry.
More refactoring is possible and will come in further commits, in
particular this is a step towards unifying the definition / lemma save path.
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This information is already present on `Proof.t`, so we extract it
form there.
Moreover, this information is essential to the lower-level proof, as
opposed to the "kind" information which is only relevant to the vernac
layer; we will move it thus to its proper layer in subsequent commits.
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Lemmas.info was a bit out of hand, as well as the parameters to the
`start_*` family. Most of the info is not needed and should hopefully
remain constrained to special cases, most callers only set the hook,
and obligations should be better served by a `start_obligation`
function soon.
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Key information about an interactive lemma proof was stored as a
closure on an ad-hoc hook, then later made available to the hook
closing actions.
Instead, we put this information in the lemma state and incorporate
these declarations into the normal save path.
We prepare to put the information about rec_thms in the state too.
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We move the role data into the evarmap instead.
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The main idea of this PR is to distinguish the types of "proof object"
`Proof_global.t` and the type of "proof object associated to a
constant, the new `Lemmas.t`.
This way, we can move the terminator setup to the higher layer in
`vernac`, which is the one that really knows about constants, paving
the way for further simplification and in particular for a unified
handling of constant saving by removal of the control inversion here.
Terminators are now internal to `Lemmas`, as it is the only part of
the code applying them.
As a consequence, proof nesting is now handled by `Lemmas`, and
`Proof_global.t` is just a single `Proof.t` plus some environmental
meta-data.
We are also enable considerable simplification in a future PR, as this
patch makes `Proof.t` and `Proof_global.t` essentially the same, so we
should expect to handle them under a unified interface.
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Formerly, knowing if a declaration was to be discharged, to be global
but invisible at import, or to be global but visible at import was
obtained by combining the parser-level information (i.e. use of
Variable/Hypothesis/Let vs use of Axiom/Parameter/Definition/..., use
of Local vs Global) with the result of testing whether there were open
sections.
We change the meaning of the Discharge flag: it does not tell anymore
that it was syntactically a Variable/Hypothesis/Let, but tells the
expected semantics of the declaration (issuing a warning in the
parser-to-interpreter step if the semantics is not the one suggested
by the syntax). In particular, the interpretation/command engine
becomes independent of the parser.
The new "semantic" type is:
type import_status = ImportDefaultBehavior | ImportNeedQualified
type locality = Discharge | Global of import_status
In the process, we found a couple of inconsistencies in the treatment
of the locality status. See bug #8722 and test file LocalDefinition.v.
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Typically instead of [start_proof : ontop:Proof_global.t option -> bla ->
Proof_global.t] we have [start_proof : bla -> Proof_global.pstate] and
the pstate is pushed on the stack by a caller around the
vernacentries/mlg level.
Naming can be a bit awkward, hopefully it can be improved (maybe in a
followup PR).
We can see some patterns appear waiting for nicer combinators, eg in
mlg we often only want to work with the current proof, not the stack.
Behaviour should be similar modulo bugs, let's see what CI says.
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