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definitions
Ack-by: SkySkimmer
Reviewed-by: Zimmi48
Ack-by: ggonthier
Reviewed-by: herbelin
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We move the role data into the evarmap instead.
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Formerly, knowing if a declaration was to be discharged, to be global
but invisible at import, or to be global but visible at import was
obtained by combining the parser-level information (i.e. use of
Variable/Hypothesis/Let vs use of Axiom/Parameter/Definition/..., use
of Local vs Global) with the result of testing whether there were open
sections.
We change the meaning of the Discharge flag: it does not tell anymore
that it was syntactically a Variable/Hypothesis/Let, but tells the
expected semantics of the declaration (issuing a warning in the
parser-to-interpreter step if the semantics is not the one suggested
by the syntax). In particular, the interpretation/command engine
becomes independent of the parser.
The new "semantic" type is:
type import_status = ImportDefaultBehavior | ImportNeedQualified
type locality = Discharge | Global of import_status
In the process, we found a couple of inconsistencies in the treatment
of the locality status. See bug #8722 and test file LocalDefinition.v.
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This is to avoid depending on the combination "Discharge" + no opened
section to trigger an automatic declaration of instance.
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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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Conversely, Type existential variables now (explicitly) cover the Set
case.
Similarly for Prop and SProp.
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We consistently use:
- UUnknown: to mean a rigid anonymous universe
(written Type in instances and Type as a sort)
[was formerly encoded as [] in Type's argument]
- UAnonymous: to mean a flexible anonymous universe
(written _ in instances and Type@{_} as a sort)
[was formerly encoded as [None] in Type's argument]
- UNamed: to mean a named universe or universe expression
(written id or qualid in instances and Type@{id} or Type@{qualid} or more
generally Type@{id+n}, Type@{qualid+n}, Type@{max(...)} as a sort)
There is a little change of syntax: "_" in a "max" list of universes
(e.g. "Type@{max(_,id+1)}" is not anymore allowed. But it was
trivially satisfiable by unifying the flexible universe with a
neighbor of the list and the syntax is anyway not documented.
There is a little change of semantics: if I do id@{Type} for an
abbreviation "id := Type", it will consider a rigid variable rather
than a flexible variable as before.
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Cooking
Reviewed-by: SkySkimmer
Ack-by: herbelin
Reviewed-by: maximedenes
Ack-by: ppedrot
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We get rid of the future wrappers, as all callers are immediately forcing
the result.
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This is the intended module for the feature provided by the inductive
discharge. This allows for a bit of code sharing and cleanup.
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* use mixfix `(p1 | … | pn)` notation for nested disjunctive patterns,
rather than infix `|`, making pattern syntax consistent with term
syntax.
* disable extending `pattern` grammar with notation incompatible with
the nested disjunctive pattern syntax `(p1 | … | pn)`, such as the `(p
| q)` divisibility notation used by `Numbers`.
* emit a (disabled by default) `disj-pattern-notation` warning when such
`Notation` is attempted.
* update documentation accordingly; document incompatibilities in
`changelog`.
* comment special treatment of `(num)` in grammar.
* update file extensions in `Pcoq` header comment.
* correct the keyword declarations to reflect the contents of the
grammar files; perhaps there should be an option to disable implicit
keyword extension in a `.mlg` file, so that these lists could actually
be checked.
* parse the `|}` manifest record terminator as `|` followed by `}`,
eliminating the `|}` token which conflicts with notations that use `|`
as a terminator (such as, absolute value, norm, or cardinal in
MathComp). Since `|` is now an `operconstr` _and_ `pattern` terminator,
`bar_cbrace` rule checks for contiguous symbols, this change entails no
visible behaviour change.
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generalization + cleanups
Reviewed-by: herbelin
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Reviewed-by: SkySkimmer
Reviewed-by: gares
Reviewed-by: maximedenes
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This removes a lot of cruft breaking the opaque proof abstraction in
Safe_typing and similar.
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The code was intricate due to the special handling of side-effects, while
it was sufficient to extrude the logical definition to make it clearer. We
thus declare a constant in two parts, first purely kernel-related, then
purely libobject-related.
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Ack-by: SkySkimmer
Reviewed-by: herbelin
Ack-by: jashug
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https://coq.inria.fr/distrib/current/refman/language/gallina-extensions.html#implicit-generalization
>The generalizing binders `{ } and `( ) work similarly to their
>explicit counterparts, only binding the generalized variables
>implicitly, as maximally-inserted arguments.
I guess this was meant to provide a way to get "(A:_) {B:bla A}" from
"`{B:bla A}" (where A is generalizable) but there's no syntax for it
so let's drop the ml side until such a syntax exists.
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- fix misleading indentation
- simplify "let a, b = e in a, b" -> "e"
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prevent them from being “canonical”
Ack-by: SkySkimmer
Ack-by: Zimmi48
Reviewed-by: gares
Ack-by: maximedenes
Ack-by: robbertkrebbers
Ack-by: vbgl
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Some of them are significant so presumably it will take a bit of
effort to fix overlays.
I left out the removal of `nf_enter` for now as MTac2 needs some
serious porting in order to avoid it.
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Ack-by: JasonGross
Ack-by: erikmd
Reviewed-by: maximedenes
Ack-by: proux01
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This is a bit more uniform.
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We make clearer which arguments are optional and which are mandatory.
Some of these representations are tricky because of small differences
between Program and Function, which share the same infrastructure.
As a side-effect of this cleanup, Program Fixpoint can now be used with
e.g. {measure (m + n) R}. Previously, parentheses were required around
R.
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Ack-by: ejgallego
Reviewed-by: gares
Ack-by: maximedenes
Ack-by: ppedrot
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Reviewed-by: SkySkimmer
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I had to reorganize the code a bit. The Context command moved to
comAssumption, as it is not so related to type classes. We were able to
remove a few hooks on the way.
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A scope delimiter was missing for primitive integers constants.
Add related regression tests.
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We perform some cleanup and remove dependency of `proofs/` on
`interp/`, which seems logical.
In fact, `interp` + `parsing` are quite self-contained, so if there is
interest we could also make tactics to depend directly on proofs.
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This cache makes the pretyper depend on components that should morally
be higher-level (Libobject and co), so I'd like to see how critical this
cache is before taking any action.
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The numerals lexed are now [0-9][0-9_]* ([.][0-9_]+)? ([eE][+-]?[0-9][0-9_]*)?
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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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In anticipation of an extension from natural numbers to other numeral
constants.
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