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to use among several of them
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- Regularly declared for for polymorphic constants
- Declared globally for monomorphic constants.
E.g mono@{i} := Type@{i} is printed as
mono@{mono.i} := Type@{mono.i}.
There can be a name clash if there's a module and a constant of the
same name. It is detected and is an error if the constant is first
but is not detected and the name for the constant not
registered (??) if the constant comes second.
Accept VarRef when registering universe binders
Fix two problems found by Gaëtan where binders were not registered properly
Simplify API substantially by not passing around a substructure of an
already carrier-around structure in interpretation/declaration code of
constants and proofs
Fix an issue of the stronger restrict universe context + no evd leak
This is uncovered by not having an evd leak in interp_definition, and
the stronger restrict_universe_context. This patch could be backported
to 8.7, it could also be triggered by the previous restrict_context I
think.
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They are now bound at the library + module level and can be qualified
and shadowed according to the usual rules of qualified names.
Parsing and printing of universes "u+n" done as well.
In sections, global universes are discharged as well, checking that
they can be defined globally when they are introduced
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We remove deprecated syntax "Coercion Local" and such, and seize the
opportunity to refactor some code around vernac_expr.
We also do a small fix on the STM classification, which didn't know about
Let Fixpoint and Let CoFixpoint.
This is a preliminary step for the work on attributes.
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See discussion on coq-club starting on 23 August 2016.
An open question: what priority to give to "abbreviations"?
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This reduces conversions between ContextSet/UContext and encodes
whether we are polymorphic by which constructor we use rather than
using some boolean.
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Also use constant_universes_entry instead of a bool flag to indicate
polymorphism in ParameterEntry.
There are a few places where we convert back to ContextSet because
check_univ_decl returns a UContext, this could be improved.
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We can enforce properties through check_univ_decl, or get an arbitrary
ordered context with UState.context / Evd.to_universe_context (the
later being a new wrapper of the former).
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Before sometimes there were lists and strings.
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constructs.
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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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We mirror the structure of EConstr and move the destructors from `Term`
to `Constr`.
This is a step towards having a single module for `Constr`.
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We'd like to handle proofs functionally we thus recommend not to use
printing functions without an explicit context.
We also adapt most of the code, making more explicit where the
printing environment is coming from.
An open task is to refactor some code so we gradually make the
`Pfedit.get_current_context ()` disappear.
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(clause "where" with implicit arguments)
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Addded by c6d9d4fb142ef42634be25b60c0995b541e86629 ["Adding ability to
put any pattern in binders, prefixed by a quote."] its current
placement as well as the hook don't make a lot of sense.
In particular, they prevent parts of Coq working without linking the
parser.
To this purpose, we need to consolidate the `Constrexpr`
utilities. While we are at it we do so and remove the `Topconstr`
module which is fully redundant with `Constrexpr_ops`.
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While we are at it we refactor a few special cases of the helper.
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We improve one step further the heuristics to sort out if a variable
is a notation variable or a named variable.
This allows to support the following which was still failing.
Reserved Notation "# x" (at level 0).
Inductive I {A:Type} := C : # 0 -> I where "# I" := (I = I).
We rely here on the property that a binding variable of same name as a
notation variables is itself considered bound by the notation.
This becomes however to be a bit tricky for sorting out if the
variable has to be output to the glob file or not.
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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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This is a first step towards some of the solutions proposed in #6008.
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It should be printed without quotes and it already has its
interpretation function.
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This makes sense here as the main client is `Stdargs`. This helps with
the concerns @herbelin had in
https://github.com/coq/coq/issues/6008#issuecomment-341107793
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4.02.3 has been the minimal OCaml version for a while now.
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This fixes also #5731, #6035, #5364.
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To this extent we factor out the relevant bits to a new file,
ltac_pretype.
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clause of an inductive definitions
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More dependencies / linking fixes.
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This allows e.g. the following to work:
Reserved Notation "* a" (at level 70).
Inductive P {n : nat} : nat -> Prop := c m : *m where "* m" := (P m).
We seize this opportunity to make main calls to Metasyntax to depend
on an arbitrary env rather than on Global.env.
Incidentally, this fixes a little coqdoc bug in classifying the
inductive type referred to in the "where" clause.
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The old algorithm was relying on list membership, which is O(n). This was
nefarious for terms with many binders. We use instead sets in O(log n).
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Introduce a "+" modifier for universe and constraint declarations to
indicate that these can be extended in the final definition/proof. By
default [Definition f] is equivalent to [Definition f@{+|+}], i.e
universes can be introduced and constraints as well. For [f@{}] or
[f@{i j}], the constraints can be extended, no universe introduced, to
maintain compatibility with existing developments. Use [f@{i j | }] to
indicate that no constraint (nor universe) can be introduced. These
kind of definitions could benefit from asynchronous processing.
Declarations of universe binders and constraints also works for
monomorphic definitions.
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Conditions for printing 'pat were incomplete.
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Was causing a failure to print recursive binders used twice or more in
the same notation.
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When a proper notation variable occurred only in a recursive pattern
of the notation, the notation was wrongly considered non printable due
(the side effect that function compare_glob_constr and that
mk_glob_constr_eq does not do anymore was indeed done by aux' but
thrown away). This fixes it.
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For instance, we don't want "id@{u}" to be coerced to id, or "?[n]" to "_".
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When we used to parse to a glob_sort but always give an empty list in
the GType case we can now parse directly to Sorts.family.
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The internal detype function takes an additional arguments dictating
whether it should be eager or lazy.
We introduce a new type of delayed `DAst.t` AST nodes and use it for
`glob_constr`.
Such type, instead of only containing a value, it can contain a lazy
computation too. We use a GADT to discriminate between both uses
statically, so that no delayed terms ever happen to be
marshalled (which would raise anomalies).
We also fix a regression in the test-suite:
Mixing laziness and effects is a well-known hell. Here, an exception
that was raised for mere control purpose was delayed and raised at a
later time as an anomaly. We make the offending function eager.
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