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We remove sections paths from kernel names. This is a cleanup as most of the times this information was unused. This implies a change in the Kernel API and small user visible changes with regards to tactic qualification. In particular, the removal of "global discharge" implies a large cleanup of code.
Additionally, the change implies that some machinery in `library` and `safe_typing` must now take an `~in_section` parameter, as to provide the information whether a section is open or not.
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The functions in `Termops.print_*` are meant to be debug printers,
however, they are sometimes used in non-debug code due to a API
confusion.
We thus wrap such functions into an `Internal` module, improve
documentation, and switch users to the right API.
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In particular we check if really used for internal debugging purpose
or to display a message to the user. In the latter case, we replace it
(when possible) by a higher-level printer (e.g. printing foo instead
of Top.foo). In the former case, we clarify that the use is a
debugging use.
Still not perfect (see a few FIXME).
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The upper layers still need a mapping constant -> projection, which is
provided by Recordops.
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We only ever call `reduction_effect_hook` on constants, so there's no
point allowing it to be declared with globrefs. There is also no point
using a constr map instead of constant map.
(Technically there was a call of the effect hook on projections, but
that can never match a globref so it was useless)
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We use an option type instead of returning a pair with a boolean. Indeed, the
boolean being true was always indicating that the returned value was unchanged.
The previous API was somewhat error-prone, and I don't understand why it was
designed this way in the first place.
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In #6092, `global_reference` was moved to `kernel`. It makes sense to
go further and use the current kernel style for names.
This has a good effect on the dependency graph, as some core modules
don't depend on library anymore.
A question about providing equality for the GloRef module remains, as
there are two different notions of equality for constants. In that
sense, `KerPair` seems suspicious and at some point it should be
looked at.
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We bootstrap the circular evar_map <-> econstr dependency by moving
the internal EConstr.API module to Evd.MiniEConstr. Then we make the
Evd functions use econstr.
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When comparing 2 irrelevant universes [u] and [v] we add a "weak
constraint" [UWeak(u,v)] to the UState. Then at minimization time a
weak constraint between unrelated universes where one is flexible
causes them to be unified.
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In Reductionops.infer_conv we did not have enough information to
properly try to unify irrelevant universes. This requires changing the
Reduction.universe_compare type a bit.
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Previously [fun x : Ind@{i} => x : Ind@{j}] with Ind some cumulative
inductive would try to generate a constraint [i = j] and use
cumulativity only if this resulted in an inconsistency. This is
confusingly different from the behaviour with [Type] and means
cumulativity can only be used to lift between universes related by
strict inequalities. (This isn't a kernel restriction so there might
be some workaround to send the kernel the right constraints, but
not in a nice way.)
See modified test for more details of what is now possible.
Technical notes:
When universe constraints were inferred by comparing the shape of
terms without reduction, cumulativity was not used and so too-strict
equality constraints were generated. Then in order to use cumulativity
we had to make this comparison fail to fall back to full conversion.
When unifiying 2 instances of a cumulative inductive type, if there
are any Irrelevant universes we try to unify them if they are
flexible.
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Following up on #6791, we remove support refolding in reduction.
We also update a test case that was not properly understood, see the
discussion in #6895.
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The part in Reduction should be semantics preserving, but Reductionops
only tried cumulativity if equality fails. This is probably wrong so I
changed it.
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arguments.
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This is a follow-up on 866b449c497933a3ab1185c194d8d33a86c432f2.
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New module introduced in OCaml 4.05 I think, can create problems when
linking with the OCaml toplevel for `Drop`.
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This was dead code, probably due to the fact it was once shared with the
kernel stack type.
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It was actually not used. The only place generating one was easily writable
without it.
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Extending terms is notoriously difficult. We try to get more help from
the compiler by making sure such an extension will trigger non
exhaustive pattern matching warnings.
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The message is the "Conversion test raised an anomaly" one.
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We do up to `Term` which is the main bulk of the changes.
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This will allow to merge back `Names` with `API.Names`
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The code from Universes what essentially a duplicate of the one from EConstr,
but they were copied for historical reasons. Now, this is not useful anymore,
so that we remove the implementation from Universes and rely on the one from
EConstr.
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This function was lurking around, waiting to bite anybody willing to use it.
We use instead a better API, correct and much less error-prone.
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