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There was a collision at the time of interpreting subentries (in
metasyntax.ml) but also at the time of "optimizing" the entries (in
egramcoq.ml).
Also fixes #9517, fixes #9519, fixes #9640 (part 3).
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This is probably a bit overkill but users are tempted to experiment
it, so we accept that both ends of a recursive notation are surrounded
with boxes which contain printing hints.
The alternative would have been to forbid the ends of a recursive
notation to be in boxes, but strictly speaking it is a bit more
restricting, even if I don't see a realistic use of the general form.
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This highlights the fact that diamond inheritance of a custom entry
is a tricky problem, as well as merely importing two custom entries with
the same name from two different modules. The only sane way to give a
semantics to that is to stick to module-scoped objects, i.e. give those
entries a kernel name. In the meantime, I went for a warning when
overriding entries.
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Fixes #9532
Fixes #9490
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And simplify a lot the compatibility infrastructure following this.
Update dev/tools/update-compat.py
Remove much complexity.
Co-authored-by: Jason Gross <jgross@mit.edu>
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We also remove trailing whitespace.
Script used:
```bash
for i in `find . -name '*.ml' -or -name '*.mli' -or -name '*.mlg'`; do expand -i "$i" | sponge "$i"; sed -e's/[[:space:]]*$//' -i.bak "$i"; done
```
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The changes are large due to `Pervasives` deprecation:
- the `Pervasives` module has been deprecated in favor of `Stdlib`, we
have opted for introducing a few wrapping functions in `Util` and
just unqualified the rest of occurrences. We avoid the shims as in
the previous attempt.
- a bug regarding partial application have been fixed.
- some formatting functions have been deprecated, but previous
versions don't include a replacement, thus the warning has been
disabled.
We may want to clean up things a bit more, in particular
w.r.t. modules once we can move to OCaml 4.07 as the minimum required
version.
Note that there is a clash between 4.08.0 modules `Option` and `Int`
and Coq's ones. It is not clear if we should resolve that clash or
not, see PR #10469 for more discussion.
On the good side, OCaml 4.08.0 does provide a few interesting
functionalities, including nice new warnings useful for devs.
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We also slightly change the semantics of the `compat` syntax modifier to
re-express it in terms of the `deprecated` attribute, and we deprecate
it in favor of the latter.
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Rather than integers '[0-9]+', numeral constant can now be parsed
according to the regexp '[0-9]+ ([.][0-9]+)? ([eE][+-]?[0-9]+)?'.
This can be used in one of the two following ways:
- using the function `Notation.register_rawnumeral_interpreter` in an OCaml plugin
- using `Numeral Notation` with the type `decimal` added to `Decimal.v`
See examples of each use case in the next two commits.
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Instead of just string (and empty strings for tokens without payload)
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Tokens were having a double role:
- the output of the lexer
- the items of grammar entries, especially terminals
Now tokens are the output of the lexer, and this paves the way for
using a richer data type, eg including Loc.t
Patterns, as in Plexing.pattern, only represent patterns (for tokens)
and now have a bit more structure (eg the wildcard is represented
as None, not as "", while a regular pattern for "x" as Some "x")
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This is a pre-requisite to use automated formatting tools such as
`ocamlformat`, also, there were quite a few places where the comments
had basically no effect, thus it was confusing for the developer.
p.s: Reading some comments was a lot of fun :)
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- remove duplicate type definitions `gram_assoc`, `gram_position`,
- make global `warning_verbose` variable into a parameter.
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This is for use in modules. By default, the behavior is local in
sections and Global is forbidden in sections. By default, the behavior
is global in modules.
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Also prevents to use an entry name already defined.
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ETName -> ETIdent
ETReference -> ETGlobal
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- New command "Declare Custom Entry bar".
- Entries can have levels.
- Printing is done using a notion of coercion between grammar
entries. This typically corresponds to rules of the form
'Notation "[ x ]" := x (x custom myconstr).' but also
'Notation "{ x }" := x (in custom myconstr, x constr).'.
- Rules declaring idents such as 'Notation "x" := x (in custom myconstr, x ident).'
are natively recognized.
- Rules declaring globals such as 'Notation "x" := x (in custom myconstr, x global).'
are natively recognized.
Incidentally merging ETConstr and ETConstrAsBinder.
Noticed in passing that parsing binder as custom was not done as in
constr.
Probably some fine-tuning still to do (priority of notations,
interactions between scopes and entries, ...). To be tested live
further.
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We deprecate the corresponding functions in Pcoq.Gram. The motivation is
that the Gram module is used as an argument to Camlp5 functors, so that
it is not stable by extension. Enforcing that its type is literally the
one Camlp5 expects ensures robustness to extension statically.
Some really internal functions have been bluntly removed. It is unlikely
that they are used by external plugins.
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format).
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In some cases, Format's inner boxes inside an outer box act as break
hints, even though there are already "better" break hints in the outer
box.
We work around this "feature" by not inserting a box around the
default printing rule for a notation if there is no effective break
points in the box.
See https://caml.inria.fr/mantis/view.php?id=7804 for the related
OCaml discussion.
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reference was defined as Ident or Qualid, but the qualid type already
permits empty paths. So we had effectively two representations for
unqualified names, that were not seen as equal by eq_reference.
We remove the reference type and replace its uses by qualid.
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Previously to this patch, `Notation_term` contained information about
both parsing and notation interpretation.
We split notation grammar to a file `parsing/notation_gram` as to make
`interp/` not to depend on some parsing structures such as entries.
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We make the vernacular implementation self-contained in the `vernac/`
directory. To this extent we relocate the parser, printer, and AST to
the `vernac/` directory, and move a couple of hint-related types to
`Hints`, where they do indeed belong.
IMO this makes the code easier to understand, and provides a better
modularity of the codebase as now all things under `tactics` have 0
knowledge about vernaculars.
The vernacular extension machinery has also been moved to `vernac/`,
this will help when #6171 [proof state cleanup] is completed along
with a stronger typing for vernacular interpretation that can
distinguish different types of effects vernacular commands can perform.
This PR introduces some very minor source-level incompatibilities due
to a different module layering [thus deprecating is not
possible]. Impact should be relatively minor.
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The `reference` type contains some ad-hoc locations in its
constructors, but there is no reason not to handle them with the
standard attribute container provided by `CAst.t`.
An orthogonal topic to this commit is whether the `reference` type
should contain a location or not at all.
It seems that many places would become a bit clearer by splitting
`reference` into non-located `reference` and `lreference`, however
some other places become messier so we maintain the current status-quo
for now.
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We follow the suggestions in #402 and turn uses of `Loc.located` in
`vernac` into `CAst.t`. The impact should be low as this change mostly
affects top-level vernaculars.
With this change, we are even closer to automatically map a text
document to its AST in a programmatic way.
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For compatibility, the default is to parse as ident and not as pattern.
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Concretely, we provide "constr as ident", "constr as strict pattern"
and "constr as pattern".
This tells to parse a binder as a constr, restricting to only ident or
to only a strict pattern, or to a pattern which can also be an ident.
The "strict pattern" modifier allows to restrict the use of patterns
in printing rules. This allows e.g. to select the appropriate rule for
printing between {x|P} and {'pat|P}.
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- Avoid dummy use of unit
- Do not decide as early as parsing the default level for pattern
- Prepare to further extensions
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Renaming it register_grammars_by_name.
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We generalize the possibility to refer to a notation not only by its
"_ U _" form but also using its "a 'U' b".
(Wish from EJGA)
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This allows in particular to define notations with 'pat style binders.
E.g.:
A non-trivial change in this commit is storing binders and patterns
separately from terms.
This is not strictly necessary but has some advantages.
However, it is relatively common to have binders also used as terms,
or binders parsed as terms. Thus, it is already relatively common to
embed binders into terms (see e.g. notation for ETA in output test
Notations3.v) or to coerce terms to idents (see e.g. the notation for
{x|P} where x is parsed as a constr).
So, it is as simple to always store idents (and eventually patterns)
as terms.
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productions.
This type describes the grammar non-terminal. It typically contains
ETConstrList (now renamed ETProdConstrList) but not ETBinder. It is
the type for metasyntax.ml and egramcoq.ml to communicate together.
The type constr_prod_entry_key with ETConstr, ETBinder, is now used
only in metasyntax.ml. This allows to get rid of some "assert false"
in uselessly matching over ETConstrList in metasyntax.ml and of some
"assert false" in uselessly matching over ETBinder in egramcoq.ml.
Also exporting less of extend.mli in API.
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