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We remove the emacs-specific printing code from the core of Coq, now
`-emacs` is a printing flag controlled by the toplevel.
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It seems there were 4 copies of the same function in the code base.
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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 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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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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Off by default.
+ small refactoring of emacs hacks in printer.ml.
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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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The addition to the test suite showcases the usage.
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let-ins
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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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This is first of a series of patches, converting `constrexpr` pattern
data type from ad-hoc location handling to `Loc.located`.
Along Coq, we can find two different coding styles for handling
objects with location information: one style uses `'a Loc.located`,
whereas other data structures directly embed `Loc.t` in their
constructors.
Handling all located objects uniformly would be very convenient, and
would allow optimizing certain cases, in particular making located
smarter when there is no location information, as it is the case for
all terms coming from the kernel.
`git grep 'Loc.t \*'` gives an overview of the remaining work to do.
We've also added an experimental API for `located` to the `Loc`
module, `Loc.tag` should be used to add locations objects, making it
explicit in the code when a "located" object is created.
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Mostly documentation and making a couple of local flags, local.
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There were actually no syntax for it, and I'm still unsure what good
syntax to give to it, even more that it would be useful to have one.
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This is the good parts of PR #360.
IIUC, these vernacular were meant mostly for debugging and they are
not supposed to be of any use these days.
Back and join are still there not to break the testing infrastructure,
but some day they should go away.
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Also adding spaces around ":=" and ":" when printed as "(x : t := c)".
Example:
Check fun y => let x : True := I in fun z => z+y=0.
(* λ (y : nat) (x : True := I) (z : nat), z + y = 0
: nat → nat → Prop *)
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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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RawLocal -> CLocal
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This is a bit long, but it is to keep a symmetry with constr_expr.
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Previously, tags were associated to terminal styles, which doesn't make
sense on terminal-free pretty printing scenarios.
This commit moves tag interpretation to the toplevel terminal handling
module `Topfmt`.
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Maxime Dénès
Emilio Jesus Gallego Arias
Hugo Herbelin
Pierre Courtieu
Gaetan Gilbert
Matej Kosik
Guillaume Melquiond