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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 allows a better control on the name to give to an evar and, in
particular, to address the issue about naming produced by "epose
proof" in one of the comment of Zimmi48 at PR #248 (see file names.v).
Incidentally updating output of Show output test (evar numbers shifted).
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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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We move Coqlib to library in preparation for the late binding of
Gallina-level references. Placing `Coqlib` in `library/` is convenient
as some components such as pretyping need to depend on it.
By moving we lose the ability to locate references by syntactic
abbreviations, but IMHO it makes to require ML code to refer to
a true constant instead of an abbreviation/notation.
Unfortunately this change means that we break the `Coqlib`
API (providing a compatibility function is not possible), however we
do so for a good reason.
The main changes are:
- move `Coqlib` to `library/`.
- remove reference -> term from `Coqlib`. In particular, clients will
have different needs with regards to universes/evar_maps, so we
force them to call the (not very safe) `Universes.constr_of_global`
explicitly so the users are marked.
- move late binding of impossible case from `Termops` to
`pretying/Evarconv`. Remove hook.
- `Coqlib.find_reference` doesn't support syntactic abbreviations
anymore.
- remove duplication of `Coqlib` code in `Program`.
- remove duplication of `Coqlib` code in `Ltac.Rewrite`.
- A special note about bug 5066 and commit 6e87877 . This case
illustrates the danger of duplication in the code base; the solution
chosen there was to transform the not-found anomaly into an error
message, however the general policy was far from clear. The long
term solution is indeed make `find_reference` emit `Not_found` and
let the client handle the error maybe non-fatally. (so they can test
for constants.
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We remove redundant functions `coq_constant`, `gen_reference`, and
`gen_constant`.
This is a first step towards a lazy binding of libraries references.
We have also chosen to untangle `constr` from `Coqlib`, as how to
instantiate the reference (in particular wrt universes) is a
client-side issue. (The client may want to provide an `evar_map` ?)
c.f. #186
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Inspired by https://coq.inria.fr/bugs/show_bug.cgi?id=5229 , which
this PR solves, I propose to remove support for non-synchronous
options.
It seems the few uses of `optsync = false` we legacy and shouldn't
have any impact.
Moreover, non synchronous options may create particularly tricky
situations as for instance, they won't be propagated to workers.
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We'd like to cleanup the `proof_end` type so we can have a smaller
path in proof save. Note that the construction:
```
Goal Type.
⋮
Save id.
```
has to be handled by the STM in the same path as Defined (but with an
opaque flag), as `Save id` will alter the environment and cannot be
processed in parallel.
We thus try to simply such paths a bit, as complexity of `lemmas.ml`
seems like an issue these days. The form `Save Theorem id` doesn't
really seem used, and moreover we should really add a type of "Goal",
and unify syntax.
It is often the case that beginners try `Goal addnC n : n + 0 = n."
etc...
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We want to print variables in vertical boxes as much as possible.
The criterion to distinguish "variable" from "hypothesis" is not
obvious. We chose this one but may change it in the future:
X:T is a variable if T is not of type Prop AND T is "simple" which
means T is either id or (t T1 .. Tn) Ti's are sort-typed (typicall
Ti:Type, but not Ti:nat).
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let-ins
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This is a partial backtrack on
63cfc77ddf3586262d905dc351b58669d185a55e. In that commit, we
disregarded exception and tried to print error messages just by
listening to feedback.
However, feedback error messages are not always emitted due to
https://coq.inria.fr/bugs/show_bug.cgi?id=5479
Thus meanwhile it is safer to go back to printing the information
present in exceptions until we tweak the STM.
This fixes https://coq.inria.fr/bugs/show_bug.cgi?id=5467 and many
other glitches not reported, such errors in nested proofs.
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Following @gasche idea, and the original intention of #402, we switch
the main parsing AST of Coq from `'a Loc.located` to `'a CAst.ast`
which is private and record-based.
This provides significantly clearer code for the AST, and is robust
wrt attributes.
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This completes the Loc.ghost removal, the idea is to gear the API
towards optional, but uniform, location handling.
We don't print <unknown> anymore in the case there is no location.
This is what the test suite expects.
The old printing logic for located items was a bit inconsistent as
it sometimes printed <unknown> and other times it printed nothing as
the caller checked for `is_ghost` upstream.
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Now it is a private field, locations are optional.
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This is the second patch, which is a bit more invasive. We reasoning
is similar to the previous patch.
Code is not as clean as it could as we would need to convert
`glob_constr` to located too, then a few parts could just map the
location.
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In 8.6 + emacs, errors were quoted sometimes with special
markers (e.g. `Print Module foo.` for a non-existing `foo`)
In 8.7 we uniformized error handling and now all errors are quoted,
however, this behavior confuses emacs as it seems that the quotes are
meant to be applied only to warnings.
We thus reflect the de-facto situation, removing quoting for errors
and updating the code so it is clear that the quoter is a warnings
quoter. We also update the warnings quoter to use a warning tag
instead of a non-printable char.
This fixes ProofGeneral for trunk users.
c.f. https://github.com/ProofGeneral/PG/issues/175
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Today, both modes are controlled by a single flag, however this is a
bit misleading as is_silent really means "quiet", that is to say `coqc
-q` whereas "verbose" is Coq normal operation.
We also restore proper behavior of goal printing in coqtop on quiet
mode, thanks to @Matafou for the report.
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This was a logic error in 63cfc77ddf3586262d905dc351b58669d185a55e,
`Notice`-level messages should not be wrapped in `<infomsg>` tags.
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Mostly documentation and making a couple of local flags, local.
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