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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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The addition to the test suite showcases the usage.
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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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We continue the uniformization pass. No big news here, trying to be
minimally invasive.
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We continue the uniformization pass. No big news here, trying to be
minimally invasive.
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The transition has been done a bit brutally. I think we can still save a
lot of useless normalizations here and there by providing the right API
in EConstr. Nonetheless, this is a first step.
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For now we only normalize sorts, and we leave instances for the next
commit.
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This is a patch fulfilling the relevant remark of Maxime that an
explicit information at the ML type level would be better than "cast
surgery" to carry the optional type of a let-in.
There are a very few semantic changes.
- a "(x:t:=c)" in a block of binders is now written in the more
standard way "(x:=c:t)"
- in notations, the type of a let-in is not displayed if not
explicitly asked so.
See discussion at PR #417 for more information.
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Incidentally, this fixes a printing bug in output/inference.v where the
displayed name of an evar was the wrong one because its type was not
evar-expanded enough.
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Suggested by @ppedrot
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In some cases prior to this patch, there were two cases for the same
error function, one taking a location, the other not.
We unify them by using an option parameter, in the line with recent
changes in warnings and feedback.
This implies a bit of clean up in some places, but more importantly, is
the preparation for subsequent patches making `Loc.location` opaque,
change that could be use to improve modularity and allow a more
functional implementation strategy --- for example --- of the
beautifier.
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Delimit the scope of the failure to ease potential need for debugging
the debugging printer.
Protect against one of the causes of failure (calling
get_family_sort_of with non-synchronized sigma).
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module)
For the moment, there is an Error module in compilers-lib/ocamlbytecomp.cm(x)a
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On the user side, coqtop and coqc take a list of warning names or categories
after -w. No prefix means activate the warning, a "-" prefix means deactivate
it, and "+" means turn the warning into an error. Special categories include
"all", and "default" which contains the warnings enabled by default.
We also provide a vernacular Set Warnings which takes the same flags as argument.
Note that coqc now prints warnings.
The name and category of a warning are printed with the warning itself.
On the developer side, Feedback.msg_warning is still accessible, but the
recommended way to print a warning is in two steps:
1) create it by:
let warn_my_warning =
CWarnings.create ~name:"my-warning" ~category:"my-category"
(fun args -> Pp.strbrk ...)
2) print it by:
warn_my_warning args
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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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The current solution may not be totally ideal though. We generate names for
anonymous evars on the fly at printing time, based on the Evar_kind data they
are wearing. This means in particular that the printed name of an anonymous
evar may change in the future because some unrelate evar has been solved or
introduced.
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Originally, rel-context was represented as:
Context.rel_context = Names.Name.t * Constr.t option * Constr.t
Now it is represented as:
Context.Rel.t = LocalAssum of Names.Name.t * Constr.t
| LocalDef of Names.Name.t * Constr.t * Constr.t
Originally, named-context was represented as:
Context.named_context = Names.Id.t * Constr.t option * Constr.t
Now it is represented as:
Context.Named.t = LocalAssum of Names.Id.t * Constr.t
| LocalDef of Names.Id.t * Constr.t * Constr.t
Motivation:
(1) In "tactics/hipattern.ml4" file we define "test_strict_disjunction"
function which looked like this:
let test_strict_disjunction n lc =
Array.for_all_i (fun i c ->
match (prod_assum (snd (decompose_prod_n_assum n c))) with
| [_,None,c] -> isRel c && Int.equal (destRel c) (n - i)
| _ -> false) 0 lc
Suppose that you do not know about rel-context and named-context.
(that is the case of people who just started to read the source code)
Merlin would tell you that the type of the value you are destructing
by "match" is:
'a * 'b option * Constr.t (* worst-case scenario *)
or
Named.Name.t * Constr.t option * Constr.t (* best-case scenario (?) *)
To me, this is akin to wearing an opaque veil.
It is hard to figure out the meaning of the values you are looking at.
In particular, it is hard to discover the connection between the value
we are destructing above and the datatypes and functions defined
in the "kernel/context.ml" file.
In this case, the connection is there, but it is not visible
(between the function above and the "Context" module).
------------------------------------------------------------------------
Now consider, what happens when the reader see the same function
presented in the following form:
let test_strict_disjunction n lc =
Array.for_all_i (fun i c ->
match (prod_assum (snd (decompose_prod_n_assum n c))) with
| [LocalAssum (_,c)] -> isRel c && Int.equal (destRel c) (n - i)
| _ -> false) 0 lc
If the reader haven't seen "LocalAssum" before, (s)he can use Merlin
to jump to the corresponding definition and learn more.
In this case, the connection is there, and it is directly visible
(between the function above and the "Context" module).
(2) Also, if we already have the concepts such as:
- local declaration
- local assumption
- local definition
and we describe these notions meticulously in the Reference Manual,
then it is a real pity not to reinforce the connection
of the actual code with the abstract description we published.
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The structure of the Context module was refined in such a way that:
- Types and functions related to rel-context declarations were put into the Context.Rel.Declaration module.
- Types and functions related to rel-context were put into the Context.Rel module.
- Types and functions related to named-context declarations were put into the Context.Named.Declaration module.
- Types and functions related to named-context were put into the Context.Named module.
- Types and functions related to named-list-context declarations were put into Context.NamedList.Declaration module.
- Types and functions related to named-list-context were put into Context.NamedList module.
Some missing comments were added to the *.mli file.
The output of ocamldoc was checked whether it looks in a reasonable way.
"TODO: cleanup" was removed
The order in which are exported functions listed in the *.mli file was changed.
(as in a mature modules, this order usually is not random)
The order of exported functions in Context.{Rel,Named} modules is now consistent.
(as there is no special reason why that order should be different)
The order in which are functions defined in the *.ml file is the same as the order in which they are listed in the *.mli file.
(as there is no special reason to define them in a different order)
The name of the original fold_{rel,named}_context{,_reverse} functions was changed to better indicate what those functions do.
(Now they are called Context.{Rel,Named}.fold_{inside,outside})
The original comments originally attached to the fold_{rel,named}_context{,_reverse} did not full make sense so they were updated.
Thrown exceptions are now documented.
Naming of formal parameters was made more consistent across different functions.
Comments of similar functions in different modules are now consistent.
Comments from *.mli files were copied to *.ml file.
(We need that information in *.mli files because that is were ocamldoc needs it.
It is nice to have it also in *.ml files because when we are using Merlin and jump to the definion of the function,
we can see the comments also there and do not need to open a different file if we want to see it.)
When we invoke ocamldoc, we instruct it to generate UTF-8 HTML instead of (default) ISO-8859-1.
(UTF-8 characters are used in our ocamldoc markup)
"open Context" was removed from all *.mli and *.ml files.
(Originally, it was OK to do that. Now it is not.)
An entry to dev/doc/changes.txt file was added that describes how the names of types and functions have changed.
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projections (off by default).
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this type is a proposition. This is based on the assumption that in
Prop, what matters first is the statement.
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variables of the context of an evar in debugging mode.
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dealing with "match".
Contrastingly, "fix" is considered not to count let-ins for finding
the recursive argument (which is ok because the last argument is
necessarily a lambda).
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This option disallows "declare at first use" semantics for universe
variables (in @{}), forcing the declaration of _all_ universes appearing
in a definition when introducing it with syntax Definition/Inductive
foo@{i j k} .. The bound universes at the end of a definition/inductive
must be exactly those ones, no extras allowed currently.
Test-suite files using the old semantics just disable the option.
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(Fix bug #4348)
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to display by default (see bc8a5357889 - 17 Oct 2014):
- not printing instances for let-in anymore even when expanded (since
they are canonical up to conversion)
- still printing x:=x in [x:=x;x':=x] when x is directly an instance
of another var, but not in [x:=x;x':=S x]
This can be discussed, but if ever this is to be changed, it should
not be printed in [x:=x;x:=?n] with ?n implicitly depending on x
(otherwise said, variables which are not displayed in instances of
internal evars should not contribute to the decision of writing
x:=x in the instance).
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