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takes a variable substitution for matched variables in the (lhs) pattern, and
uses the existing ist structure to pretype the rhs correcly, without
having to deal with the volatile evars.
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This is important to disambiguate identical names from different modules.
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This patch allows Coq terms to be extracted into the widely used JSON
format. This is useful in at least two cases:
- One might want to manipulate Coq values outside of Coq, but without
being forced to use one of the three existing extraction languages
(OCaml, Haskell, or Scheme), and without having to compile Coq's
extracted result. This is especially useful when a Coq evaluation
produces some data structure that needs to be moved out of Coq.
Having to invoke an OCaml/Haskell/Scheme compiler just to get a
data structure out of Coq is somewhat awkward.
- One might want to experiment with extracting Coq code into other
languages (Go, Javascript, etc), without having to write the whole
extraction logic in OCaml and recompile Coq's extraction plugin
each time. This makes it easy to quickly prototype extraction
in any language, without having to build Coq from source.
Extraction to JSON is implemented by adding the JSON "pseudo-language"
to the extraction facility. Thus, one can extract the JSON encoding
of a single term using:
Extraction Language JSON.
Extraction qualid.
and extract an entire Coq library "ident" into "ident.json" using:
Extraction Language JSON.
Extraction Library ident.
Nota (Pierre Letouzey) : this is an updated version of the original
PullRequest, updated to match recent changes in trunk
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The extraction machinery has specialized support for extracting [ascii]
characters into native characters in the target language, as opposed
to using an explicit constructor from 8 boolean bits. This works by
hard-coding the name of the character type in the target language.
Unfortunately, the hard-coded type for Haskell was "Char", not the
fully-qualified "Prelude.Char". As a result, it was impossible to
extract characters into Haskell without getting type errors about "Char".
This patch changes this hard-coded name to "Prelude.Char".
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Commit 84c2433a introduced the Any type alias as the Haskell extracted
version of MiniML's Tunknown. However, the code to define the Any
type alias was generated conditional on usf.magic. As it turns out,
sometimes Tunknown appears even if usf.magic is false (i.e., even if
MLmagic does not appear anywhere in the AST). This produced Haskell
code that would not compile; e.g.:
% coqtop
Coq < Extraction Language Haskell.
Coq < Extraction Library Datatypes.
The file Datatypes.hs has been created by extraction.
% ghc Datatypes.hs
[1 of 1] Compiling Datatypes ( Datatypes.hs, Datatypes.o )
Datatypes.hs:261:17: Not in scope: type constructor or class `Any'
Datatypes.hs:261:24: Not in scope: type constructor or class `Any'
The fix is straightforward: produce the code that defines the Any type
alias if usf.tunknown is true.
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replacement for 8.4's "Require Omega").
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`end proof` changes the proof mode to `"Classic"`.
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So that the commands are assigned the appropriate status of syntax-changing or not, as well as the proof mode they are setting.
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It will not work in CoqIDE though, which handles printing its own way. It's a general remark that we have many ways of printing things in Coq and we should look for a unified structured framework to be shared between interfaces.
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(Fix for bugs #3470 and #3694)
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subproofs.
The front-end is supposed to take care of that, but it may help to catch bugs.
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It was probably creating bugs when trying to use [escape].
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I had previously mistakenly enforced the property that after solving every goal in a block, unfocusing was performed automatically until one goal is in focus. This is not how the declarative mode is supposed to behave. Rather every focus must be explicitely unfocused by a closing command.
This hit a few bad interaction with the pure representation of proof introduced for the asynchronous processing.
Some of the invariants seem fragile, so this minimally disruptive solution is probably not long-term. In particular since each block uses the same focus kind, an `end <block>` may close another block than intended if the number of unfocussing command executed is not the right one.
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Backported from trunk.
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After executing a command classified as VtProofStep the stm
prints the goals (if used via the tty API).
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- no more inconsistent Axiom in the Prelude
- STM can now process Admitted proofs asynchronously
- the quick chain can stock "Admitted" jobs in .vio files
- the vio2vo step checks the jobs but does not stock the result
in the opaque tables (they have no slot)
- Admitted emits a warning if the proof is complete
- Admitted uses the (partial) proof term to infer section variables
used (if not given with Proof using), like for Qed
- test-suite: extra line Require TestSuite.admit to each file making
use of admit
- test-suite/_CoqProject: to pass to CoqIDE and PG the right -Q flag to
find TestSuite.admit
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instances and forgeting about the evars and universes that could appear
there... dirty hack gone, using the evar map properly and avoiding
needless constructions/deconstructions of terms.
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pattern_of_constr in an evar_map, as they can appear in the context
of said named metas, which is used by change. Not sure what to do in
the PEvar case, which never matches anyway according to Constr_matching.matches.
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of plugins.
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Of course such proofs cannot be processed asynchronously
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typecheck with definitions and thread it accordingly when typechecking
module expressions.
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This reverts commit bff2b36cb0e2dbd02c4f181fba545a420e847767.
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Since name clashes are discovered by side effects, the order of traversal of
module structs cannot be changed.
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The control flow of extraction is hard to read due to exceptions. When meeting
an inlined constant extracted to custom code, they could desynchronize some
tables in charge of detecting name clashes, leading to an anomaly.
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After this commit, module_type_body is a particular case of module_type.
For a [module_type_body], the implementation field [mod_expr] is
supposed to be always [Abstract]. This is verified by coqchk, even
if this isn't so crucial, since [mod_expr] is never read in the case
of a module type.
Concretely, this amounts to the following rewrite on field names
for module_type_body:
- typ_expr --> mod_type
- typ_expr_alg --> mod_type_alg
- typ_* --> mod_*
and adding two new fields to mtb:
- mod_expr (always containing Abstract)
- mod_retroknowledge (always containing [])
This refactoring should be completely transparent for the user.
Pros: code sharing, for instance subst_modtype = subst_module.
Cons: a runtime invariant (mod_expr = Abstract) which isn't
enforced by typing. I tried a polymorphic typing of mod_expr,
to share field names while not having mtb = mb, but the OCaml
typechecker isn't clever enough with polymorphic mutual fixpoints,
and reject code sharing (e.g. between subst_modtype and subst_module).
In the future (with ocaml>=4), some GADT could maybe help here,
but for now the current solution seems good enough.
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In the case of an inner module without explicit signature,
(and not used later in a functor application), we now extract
only the needed items (used later or asked by the user),
instead of blindly extracting all fields as earlier.
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Since type variables are local to the definition, we simply rename
them in case of unicode chars. We also get rid of any ' to avoid
Ocaml illegal 'a' type var (clash with char litteral).
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- Common.get_native_char instead of just a pp function of this char
- Enrich the record projection table
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Removing unused argument and fixing bug #3899, now warning when a record
cannot be made primitive in Set Primitive Projections mode because it
has no projection or at least one undefinable projection.
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