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Due to a bad interaction between PRs, the `Names.global_reference`
alias was removed in 8.9, where it should disappear in 8.10.
The original PR #6156 deprecated the alias in `Libnames`.
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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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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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We deprecate a few functions that were deprecated in the comments plus
we place `Nameops` and `Univops` in engine where they do seem to
belong in the large picture of code organization.
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This module collects the functions of Nameops which are about Name.t
and somehow standardize or improve their name, resulting in particular
from discussions in working group.
Note the use of a dedicated exception rather than a failwith for
Nameops.Name.out.
Drawback of the approach: one needs to open Nameops, or to use long
prefix Nameops.Name.
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This is the continuation of #244, we now deprecate `CErrors.error`,
the single entry point in Coq is `user_err`.
The rationale is to allow for easier grepping, and to ease a future
cleanup of error messages. In particular, we would like to
systematically classify all error messages raised by Coq and be sure
they are properly documented.
We restore the two functions removed in #244 to improve compatibility,
but mark them deprecated.
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Namely: Replacing (currently deactivated) warning on illegal ident by
an error in strict mode and nothing in soft mode.
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This reverts commit 0d364f7aa5cee042f0b327966fce35778f3285e0.
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This reverts commit 7a51d6a94bdd6cc889cd69fa0fbb5c8a655b2b16.
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This reverts commit e180cce2384bacaa5ad5b9d6e15b55de8cc913cc.
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We now build Coq with `-safe-string`, which enforces functional use
of the `string` datatype. Coq was pretty safe in these regard so only
a few tweaks were needed.
- coq_makefile: build plugins with -safe-string too.
- `names.ml`: we remove `String.copy` uses, as they are not needed.
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We add a more convenient API to create identifiers from mutable
strings. We cannot solve the `String.copy` deprecation problem until
we enable `-safe-string`.
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We make this warning configurable and disabled by default.
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composition operator.
Short story:
This pull-request:
(1) removes the definition of the "right-to-left" function composition operator
(2) adds the definition of the "left-to-right" function composition operator
(3) rewrites the code relying on "right-to-left" function composition to rely on "left-to-right" function composition operator instead.
Long story:
In mathematics, function composition is traditionally denoted with ∘ operator.
Ocaml standard library does not provide analogous operator under any name.
Batteries Included provides provides two alternatives:
_ % _
and
_ %> _
The first operator one corresponds to the classical ∘ operator routinely used in mathematics.
I.e.:
(f4 % f3 % f2 % f1) x ≜ (f4 ∘ f3 ∘ f2 ∘ f1) x
We can call it "right-to-left" composition because:
- the function we write as first (f4) will be called as last
- and the function write as last (f1) will be called as first.
The meaning of the second operator is this:
(f1 %> f2 %> f3 %> f4) x ≜ (f4 ∘ f3 ∘ f2 ∘ f1) x
We can call it "left-to-right" composition because:
- the function we write as first (f1) will be called first
- and the function we write as last (f4) will be called last
That is, the functions are written in the same order in which we write and read them.
I think that it makes sense to prefer the "left-to-right" variant because
it enables us to write functions in the same order in which they will be actually called
and it thus better fits our culture
(we read/write from left to right).
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more cleanups
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module)
For the moment, there is an Error module in compilers-lib/ocamlbytecomp.cm(x)a
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This patch splits pretty printing representation from IO operations.
- `Pp` is kept in charge of the abstract pretty printing representation.
- The `Feedback` module provides interface for doing printing IO.
The patch continues work initiated for 8.5 and has the following effects:
- The following functions in `Pp`: `pp`, `ppnl`, `pperr`, `pperrnl`,
`pperr_flush`, `pp_flush`, `flush_all`, `msg`, `msgnl`, `msgerr`,
`msgerrnl`, `message` are removed. `Feedback.msg_*` functions must be
used instead.
- Feedback provides different backends to handle output, currently,
`stdout`, `emacs` and CoqIDE backends are provided.
- Clients cannot specify flush policy anymore, thus `pp_flush` et al are
gone.
- `Feedback.feedback` takes an `edit_or_state_id` instead of the old
mix.
Lightly tested: Test-suite passes, Proof General and CoqIDE seem to work.
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hash-consing, so as to avoid having too many kinds of equalities with
same name.
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constant/inductive/constructor kernel_name pairs rather than viewing
them from only the user or canonical part.
Hopefully more uniformity in Constr.hasheq (using systematically == on
subterms).
A semantic change: Cooking now indexing again on full pairs of kernel
names rather than only on the canonical names, so as to preserve user
name.
Also, in pair of kernel names, ensuring the compact representation is
used as soon as both names are the same.
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Two new (trivial) functions were added:
Names.Name.is_anonymous : Names.Name.t -> bool
Names.Name.is_name : Names.Name.t -> bool
They enable us to write a more compact code.
(example: commit "99633f4" in "relation-extraction" module of "coq-contribs").
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Now distinguishes between bound modules (Top#X) and submodules (Top.X).
Could be useful for the regular printer as well (e.g. in error messages), but I
don't know what the compatibility constraints are, so leaving it as it is for
now.
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Sorry so much.
Reverted:
707bfd5719b76d131152a258d49740165fbafe03.
164637cc3a4e8895ed4ec420e300bd692d3e7812.
b9c96c601a8366b75ee8b76d3184ee57379e2620.
21e41af41b52914469885f40155702f325d5c786.
7532f3243ba585f21a8f594d3dc788e38dfa2cb8.
27fb880ab6924ec20ce44aeaeb8d89592c1b91cd.
fe340267b0c2082b3af8bc965f7bc0e86d1c3c2c.
d9b13d0a74bc0c6dff4bfc61e61a3d7984a0a962.
6737055d165c91904fc04534bee6b9c05c0235b1.
342fed039e53f00ff8758513149f8d41fa3a2e99.
21525bae8801d98ff2f1b52217d7603505ada2d2.
b78d86d50727af61e0c4417cf2ef12cbfc73239d.
979de570714d340aaab7a6e99e08d46aa616e7da.
f556da10a117396c2c796f6915321b67849f65cd.
d8226295e6237a43de33475f798c3c8ac6ac4866.
fdab811e58094accc02875c1f83e6476f4598d26.
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hash-consing, so as to avoid having too many kinds of equalities with
same name.
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constant/inductive/constructor kernel_name pairs rather than viewing
them from only the user or canonical part.
Hopefully more uniformity in Constr.hasheq (using systematically == on
subterms).
A semantic change: Cooking now indexing again on full pairs of kernel
names rather than only on the canonical names, so as to preserve user
name.
Also, in pair of kernel names, ensuring the compact representation is
used as soon as both names are the same.
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The hash function exported by the interface ought to respect the equality.
Therefore, we only use the syntactic hash for the hashconsing module while
using the canonical hash in the API.
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compatible with a unique bound module name counter which is not
synchronous with the backtracking).
We changed hash-consing of kernel name pairs to a purely memory
management issue, not trying to exploit logical properties such as
"syntactically equal user names have syntactically same canonical
names" (which is true in a given logical session, but not in memory,
at least because of residual values after backtracking).
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The solution is a bit ugly. In order for two tactic notations identifiers not
to be confused by the inclusion from two distinct modules, we embed the name of
the source module in the identifiers. This may still fail if the same module is
included twice with two distinct parameters, but this should not be possible
thanks to the fact any definition in there will forbid the inclusion, for it
would be repeated. People including twice the same empty module otherwise
probably deserve whatever will arise from it.
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Emilio Jesus Gallego Arias
Gaëtan Gilbert
Théo Zimmermann
Pierre-Marie Pédrot
Hugo Herbelin
Gaetan Gilbert
Matej Kosik
Maxime Dénès
Matej Kosik
Pierre Letouzey