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Having [map] means we can structure attributes when combining them, eg
get an attribute for [type universe_data = { poly : bool option; template : bool
option }] from 2 [bool option] attributes.
Using the previous representation we would have had to provide the
inverse function [universe_data -> bool option * bool option] as well.
An alternate way to get (++) is
let (++) (x:'a t) (y:'b t) : ('a*'b) t =
x >>= fun xv ->
y >>= fun yv ->
return (xv,yv)
Not sure if that would be cleaner.
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Commands need to request the attributes they use, with the API
encouraging them to error on unsupported attributes.
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It was never set, because it makes no sense.
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We move `object_prefix` to `Nametab`. This highlights the coupling of
`Lib` and `Nametab` wrt naming.
This also thins `Libname`, which IMHO is a good thing as we are
talking about "local, internal" naming here.
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This type is "private" to the Nametab, which manages it. It thus makes
sense IMHO to live there.
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This is a step towards limiting calls to the global environment.
Incidentally unify naming evd -> sigma in Termops.
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for the determination of evars that can be turned into obligations.
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This introduces a bit of noise in the Dune files but for now I think
it is the best way to do it.
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Fixes #8224, fixes #8427 .
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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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Removing a few Global.env in the way.
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In favor of a constr_of_monomorphic_global function. When people
move to the new Coqlib interface they will also see this deprecation
message encouraging them to think about the best move.
This commit changes a few references to constr_of_global and replaces
them with a constr_of_monomorphic_global which makes it apparent that
this is not the function to call to globalize polymorphic references.
The remaining parts using constr_of_monomorphic_global are easily
identifiable using this: omega, btauto, ring, funind and auto_ind_decl
mainly (this fixes firstorder). What this means is that the symbols
registered for these tactics have to be monomorphic for now.
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In general, `Nametab` is not a module you want to open globally as it
exposes very generic identifiers such as `push` or `global`.
Thus, we remove all global opens and qualify `Nametab` access. The
patch is small and confirms the hypothesis that `Nametab` access
happens in few places thus it doesn't need a global open.
It is also very convenient to be able to use `grep` to see accesses to
the namespace table.
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It's basically an occur check so it makes sense to put it in vars
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We chose to stick to the most general possible API, even though the macro
will not make full use of the possibilities. It makes explicit the various
data expected to be provided in an orthogonal way.
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This is a theoretical change of semantics in the presence of commands
generating a "hook", such as "Coercion c := ...", or "SubClass", or
"Canonical Structure". However, none of these commands have a
"Discharge" effect, so the case was not used.
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In particular, we highlight the similarities and differences between
local and global definitions.
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Lintian found some spelling errors in the Debian packaging for coq. Fix
them most places they appear in the current source. (Don't change
documentation anchor names, as that would invalidate external
deeplinks.)
This also fixes a bug in coqdoc: prior to this commit, coqdoc would
highlight `instanciate` but not `instantiate`.
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This is to move a standard combinator to the place it belongs to. An
alternative could have been to put it in termops.ml, but termops.ml is
now about econstr, so, even if it makes the kernel "bigger", constr.ml
seems to be the best place for this combinator. After all, this
combinator is canonical.
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"Declaration" hooks can be polymorphic on their return type, however
this facility doesn't seem used in the codebase.
We thus remove the polymorphism with the hope to be able to reify the
control later on.
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These hooks are 10-years old and long unused I think.
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We refactor the `Coqlib` API to locate objects over a namespace
`module.object.property`.
This introduces the vernacular command `Register g as n` to expose the
Coq constant `g` under the name `n` (through the `register_ref`
function). The constant can then be dynamically located using the
`lib_ref` function.
Co-authored-by: Emilio Jesús Gallego Arias <e+git@x80.org>
Co-authored-by: Maxime Dénès <mail@maximedenes.fr>
Co-authored-by: Vincent Laporte <Vincent.Laporte@fondation-inria.fr>
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Note that since this now reduces before restricting universes
behaviour may be a bit different.
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A few of them will be of help for future cleanups. We have spared the
stuff in `Names` due to bad organization of this module following the
split from `Term`, which really difficult things removing the
constructors.
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