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-rw-r--r--.circleci/config.yml40
-rw-r--r--.gitlab-ci.yml23
-rw-r--r--dev/ci/README.md27
-rw-r--r--dev/ci/ci-common.sh4
-rw-r--r--dev/ci/user-overlays/07213-ppedrot-fast-constr-match-no-context.sh6
-rw-r--r--dev/doc/MERGING.md5
-rw-r--r--doc/sphinx/language/gallina-specification-language.rst92
-rw-r--r--doc/sphinx/proof-engine/proof-handling.rst10
-rw-r--r--engine/evd.ml4
-rw-r--r--engine/uState.ml2
-rw-r--r--engine/universes.ml34
-rw-r--r--engine/universes.mli9
-rw-r--r--plugins/ltac/tactic_matching.ml2
-rw-r--r--pretyping/constr_matching.ml4
-rw-r--r--pretyping/constr_matching.mli2
15 files changed, 145 insertions, 119 deletions
diff --git a/.circleci/config.yml b/.circleci/config.yml
index 14c102cede..79f83d4720 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -160,22 +160,22 @@ workflows:
requires:
- build
- bignums
- - compcert: *req-main
- - coq-dpdgraph: *req-main
- - coquelicot: *req-main
- - cross-crypto: *req-main
- - elpi: *req-main
- - equations: *req-main
- - geocoq: *req-main
- - fcsl-pcm: *req-main
- - fiat-crypto: *req-main
- - fiat-parsers: *req-main
- - flocq: *req-main
+ # - compcert: *req-main
+ # - coq-dpdgraph: *req-main
+ # - coquelicot: *req-main
+ # - cross-crypto: *req-main
+ # - elpi: *req-main
+ # - equations: *req-main
+ # - geocoq: *req-main
+ # - fcsl-pcm: *req-main
+ # - fiat-crypto: *req-main
+ # - fiat-parsers: *req-main
+ # - flocq: *req-main
- math-classes:
requires:
- build
- bignums
- - mtac2: *req-main
+ # - mtac2: *req-main
- corn:
requires:
- build
@@ -184,11 +184,11 @@ workflows:
requires:
- build
- corn
- - hott: *req-main
- - iris-lambda-rust: *req-main
- - ltac2: *req-main
- - math-comp: *req-main
- - pidetop: *req-main
- - sf: *req-main
- - unimath: *req-main
- - vst: *req-main
+ # - hott: *req-main
+ # - iris-lambda-rust: *req-main
+ # - ltac2: *req-main
+ # - math-comp: *req-main
+ # - pidetop: *req-main
+ # - sf: *req-main
+ # - unimath: *req-main
+ # - vst: *req-main
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 095099690b..c010da4cfc 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,6 +1,7 @@
-image: coqci/base:V2018-05-07-V2
+image: "$IMAGE"
stages:
+ - docker
- build
- test
@@ -9,11 +10,28 @@ variables:
# Format: $IMAGE-V$DATE [Cache is not used as of today but kept here
# for reference]
CACHEKEY: bionic_coq-V2018-05-07-V2
+ IMAGE: "$CI_REGISTRY_IMAGE:$CACHEKEY"
# By default, jobs run in the base switch; override to select another switch
OPAM_SWITCH: "base"
# Used to select special compiler switches such as flambda, 32bits, etc...
OPAM_VARIANT: ""
+docker-boot:
+ stage: docker
+ image: docker:stable
+ services:
+ - docker:dind
+ before_script: []
+ script:
+ - docker login -u gitlab-ci-token -p "$CI_JOB_TOKEN" "$CI_REGISTRY"
+ - cd dev/ci/docker/bionic_coq/
+ - if docker pull "$IMAGE"; then echo "Image prebuilt!"; exit 0; fi
+ - docker build -t "$IMAGE" .
+ - docker push "$IMAGE"
+ except:
+ variables:
+ - $SKIP_DOCKER == "true"
+
before_script:
- cat /proc/{cpu,mem}info || true
- ls -a # figure out if artifacts are around
@@ -76,7 +94,7 @@ before_script:
- set +e
variables: &warnings-variables
- COQ_EXTRA_CONF: "-native-compiler yes -coqide byte -byte-only"
+ COQ_EXTRA_CONF: "-native-compiler yes -coqide byte -byte-only -warn-error yes"
# every non build job must set dependencies otherwise all build
# artifacts are used together and we may get some random Coq. To that
@@ -199,6 +217,7 @@ warnings:base:
warnings:edge:
<<: *warnings-template
variables:
+ <<: *warnings-variables
OPAM_SWITCH: edge
test-suite:base:
diff --git a/dev/ci/README.md b/dev/ci/README.md
index 87f03aa994..dee3d2aff7 100644
--- a/dev/ci/README.md
+++ b/dev/ci/README.md
@@ -96,7 +96,8 @@ PR by running GitLab CI on your private branches. To do so follow these steps:
2. Click on "New Project".
3. Choose "CI / CD for external repository" then click on "GitHub".
4. Find your fork of the Coq repository and click on "Connect".
-5. You are encouraged to go to the CI / CD general settings and increase the
+5. If GitLab did not do so automatically, [enable the Container Registry](https://docs.gitlab.com/ee/user/project/container_registry.html#enable-the-container-registry-for-your-project).
+6. You are encouraged to go to the CI / CD general settings and increase the
timeout from 1h to 2h for better reliability.
Now everytime you push (including force-push unless you changed the default
@@ -137,3 +138,27 @@ Currently, available artifacts are:
As an exception to the above, jobs testing that compilation triggers
no OCaml warnings build Coq in parallel with other tests.
+
+### GitLab and Windows
+
+
+If your repository has access to runners tagged `windows`, setting the
+secret variable `WINDOWS` to `enabled` will add jobs building Windows
+versions of Coq (32bit and 64bit).
+
+The Windows jobs are enabled on Coq's repository, where pipelines for
+pull requests run.
+
+### GitLab and Docker
+
+System and opam packages are installed in a Docker image. The image is
+automatically built and uploaded to your GitLab registry, and is
+loaded by subsequent jobs.
+
+The Docker building job reuses the uploaded image if it is available,
+but if you wish to save more time you can skip the job by setting
+`SKIP_DOCKER` to `true`.
+
+This means you will need to change its value when the Docker image
+needs to be updated. You can do so for a single pipeline by starting
+it through the web interface.
diff --git a/dev/ci/ci-common.sh b/dev/ci/ci-common.sh
index 189734a0bc..2a14ed352a 100644
--- a/dev/ci/ci-common.sh
+++ b/dev/ci/ci-common.sh
@@ -10,6 +10,10 @@ if [ -n "${GITLAB_CI}" ];
then
export COQBIN="$PWD/_install_ci/bin"
export CI_BRANCH="$CI_COMMIT_REF_NAME"
+ if [[ ${CI_BRANCH#pr-} =~ ^[0-9]*$ ]]
+ then
+ export CI_PULL_REQUEST="${CI_BRANCH#pr-}"
+ fi
else
if [ -n "${TRAVIS}" ];
then
diff --git a/dev/ci/user-overlays/07213-ppedrot-fast-constr-match-no-context.sh b/dev/ci/user-overlays/07213-ppedrot-fast-constr-match-no-context.sh
new file mode 100644
index 0000000000..517088a247
--- /dev/null
+++ b/dev/ci/user-overlays/07213-ppedrot-fast-constr-match-no-context.sh
@@ -0,0 +1,6 @@
+if [ "$CI_PULL_REQUEST" = "7213" ] || [ "$CI_BRANCH" = "fast-constr-match-no-context" ]; then
+
+ ltac2_CI_BRANCH=fast-constr-match-no-context
+ ltac2_CI_GITURL=https://github.com/ppedrot/ltac2
+
+fi
diff --git a/dev/doc/MERGING.md b/dev/doc/MERGING.md
index 84ff94c66a..a466124c1c 100644
--- a/dev/doc/MERGING.md
+++ b/dev/doc/MERGING.md
@@ -109,9 +109,8 @@ There are two cases to consider:
The merge script passes option `-S` to `git merge` to ensure merge commits
are signed. Consequently, it depends on the GnuPG command utility being
-installed and a GPG key being available. Here is a short tutorial to
-creating your own GPG key:
-<https://ekaia.org/blog/2009/05/10/creating-new-gpgkey/>
+installed and a GPG key being available. Here is a short documentation on
+how to use GPG, git & GitHub: https://help.github.com/articles/signing-commits-with-gpg/.
The script depends on a few other utilities. If you are a Nix user, the
simplest way of getting them is to run `nix-shell` first.
diff --git a/doc/sphinx/language/gallina-specification-language.rst b/doc/sphinx/language/gallina-specification-language.rst
index 39735a6eda..aa41f8058d 100644
--- a/doc/sphinx/language/gallina-specification-language.rst
+++ b/doc/sphinx/language/gallina-specification-language.rst
@@ -1245,37 +1245,37 @@ inhabitant of the type) is interactively built using tactics. The interactive
proof mode is described in Chapter :ref:`proofhandling` and the tactics in
Chapter :ref:`Tactics`. The basic assertion command is:
-.. cmd:: Theorem @ident : @type
+.. cmd:: Theorem @ident {? @binders } : @type
-After the statement is asserted, Coq needs a proof. Once a proof of
-:token:`type` under the assumptions represented by :token:`binders` is given and
-validated, the proof is generalized into a proof of forall , :token:`type` and
-the theorem is bound to the name :token:`ident` in the environment.
+ After the statement is asserted, Coq needs a proof. Once a proof of
+ :token:`type` under the assumptions represented by :token:`binders` is given and
+ validated, the proof is generalized into a proof of :n:`forall @binders, @type` and
+ the theorem is bound to the name :token:`ident` in the environment.
-.. exn:: The term @term has type @type which should be Set, Prop or Type.
+ .. exn:: The term @term has type @type which should be Set, Prop or Type.
-.. exn:: @ident already exists.
- :name: @ident already exists. (Theorem)
+ .. exn:: @ident already exists.
+ :name: @ident already exists. (Theorem)
- The name you provided is already defined. You have then to choose
- another name.
+ The name you provided is already defined. You have then to choose
+ another name.
-.. cmdv:: Lemma @ident : @type
- :name: Lemma
+ The following commands are synonyms of :n:`Theorem @ident {? @binders } : type`:
-.. cmdv:: Remark @ident : @type
- :name: Remark
+ .. cmdv:: Lemma @ident {? @binders } : @type
+ :name: Lemma
-.. cmdv:: Fact @ident : @type
- :name: Fact
+ .. cmdv:: Remark @ident {? @binders } : @type
+ :name: Remark
-.. cmdv:: Corollary @ident : @type
- :name: Corollary
+ .. cmdv:: Fact @ident {? @binders } : @type
+ :name: Fact
-.. cmdv:: Proposition @ident : @type
- :name: Proposition
+ .. cmdv:: Corollary @ident {? @binders } : @type
+ :name: Corollary
- These commands are synonyms of ``Theorem`` :token:`ident` : :token:`type`.
+ .. cmdv:: Proposition @ident {? @binders } : @type
+ :name: Proposition
.. cmdv:: Theorem @ident : @type {* with @ident : @type}
@@ -1302,13 +1302,13 @@ the theorem is bound to the name :token:`ident` in the environment.
.. cmdv:: Definition @ident : @type
This allows defining a term of type :token:`type` using the proof editing
- mode. It behaves as Theorem but is intended to be used in conjunction with
+ mode. It behaves as :cmd:`Theorem` but is intended to be used in conjunction with
:cmd:`Defined` in order to define a constant of which the computational
behavior is relevant.
The command can be used also with :cmd:`Example` instead of :cmd:`Definition`.
- See also :cmd:`Opaque`, :cmd:`Transparent`, :tacn:`unfold`.
+ .. seealso:: :cmd:`Opaque`, :cmd:`Transparent`, :tacn:`unfold`.
.. cmdv:: Let @ident : @type
@@ -1328,21 +1328,14 @@ the theorem is bound to the name :token:`ident` in the environment.
This generalizes the syntax of CoFixpoint so that one or more bodies
can be defined interactively using the proof editing mode.
-.. cmd:: Proof
-
- A proof starts by the keyword Proof. Then Coq enters the proof editing mode
- until the proof is completed. The proof editing mode essentially contains
- tactics that are described in chapter :ref:`Tactics`. Besides tactics, there
- are commands to manage the proof editing mode. They are described in Chapter
- :ref:`proofhandling`.
-
-.. cmd:: Qed
-
- When the proof is completed it should be validated and put in the environment
- using the keyword Qed.
+A proof starts by the keyword :cmd:`Proof`. Then Coq enters the proof editing mode
+until the proof is completed. The proof editing mode essentially contains
+tactics that are described in chapter :ref:`Tactics`. Besides tactics, there
+are commands to manage the proof editing mode. They are described in Chapter
+:ref:`proofhandling`.
-.. exn:: @ident already exists.
- :name: @ident already exists. (Qed)
+When the proof is completed it should be validated and put in the environment
+using the keyword :cmd:`Qed`.
.. note::
@@ -1351,28 +1344,19 @@ the theorem is bound to the name :token:`ident` in the environment.
#. Not only other assertions but any vernacular command can be given
while in the process of proving a given assertion. In this case, the
command is understood as if it would have been given before the
- statements still to be proved.
-
- #. Proof is recommended but can currently be omitted. On the opposite
- side, Qed (or Defined, see below) is mandatory to validate a proof.
+ statements still to be proved. Nonetheless, this practice is discouraged
+ and may stop working in future versions.
- #. Proofs ended by Qed are declared opaque. Their content cannot be
+ #. Proofs ended by :cmd:`Qed` are declared opaque. Their content cannot be
unfolded (see :ref:`performingcomputations`), thus
realizing some form of *proof-irrelevance*. To be able to unfold a
- proof, the proof should be ended by Defined (see below).
-
-.. cmdv:: Defined
- :name: Defined
-
- Same as :cmd:`Qed` but the proof is then declared transparent, which means
- that its content can be explicitly used for type-checking and that it can be
- unfolded in conversion tactics (see :ref:`performingcomputations`,
- :cmd:`Opaque`, :cmd:`Transparent`).
+ proof, the proof should be ended by :cmd:`Defined`.
-.. cmdv:: Admitted
- :name: Admitted
+ #. :cmd:`Proof` is recommended but can currently be omitted. On the opposite
+ side, :cmd:`Qed` (or :cmd:`Defined`) is mandatory to validate a proof.
- Turns the current asserted statement into an axiom and exits the proof mode.
+ #. One can also use :cmd:`Admitted` in place of :cmd:`Qed` to turn the
+ current asserted statement into an axiom and exit the proof editing mode.
.. [1]
This is similar to the expression “*entry* :math:`\{` sep *entry*
diff --git a/doc/sphinx/proof-engine/proof-handling.rst b/doc/sphinx/proof-engine/proof-handling.rst
index 069cf8a6dc..892ddbc165 100644
--- a/doc/sphinx/proof-engine/proof-handling.rst
+++ b/doc/sphinx/proof-engine/proof-handling.rst
@@ -60,7 +60,6 @@ list of assertion commands is given in :ref:`Assertions`. The command
used for another statement).
.. cmd:: Qed
- :name: Qed (interactive proof)
This command is available in interactive editing proof mode when the
proof is completed. Then :cmd:`Qed` extracts a proof term from the proof
@@ -82,9 +81,12 @@ list of assertion commands is given in :ref:`Assertions`. The command
even incur a memory overflow.
.. cmdv:: Defined
- :name: Defined (interactive proof)
+ :name: Defined
- Defines the proved term as a transparent constant.
+ Same as :cmd:`Qed` but the proof is then declared transparent, which means
+ that its content can be explicitly used for type-checking and that it can be
+ unfolded in conversion tactics (see :ref:`performingcomputations`,
+ :cmd:`Opaque`, :cmd:`Transparent`).
.. cmdv:: Save @ident
:name: Save
@@ -94,7 +96,6 @@ list of assertion commands is given in :ref:`Assertions`. The command
has been opened using the :cmd:`Goal` command.
.. cmd:: Admitted
- :name: Admitted (interactive proof)
This command is available in interactive editing mode to give up
the current proof and declare the initial goal as an axiom.
@@ -125,7 +126,6 @@ list of assertion commands is given in :ref:`Assertions`. The command
proof term (see Section :ref:`applyingtheorems`).
.. cmd:: Proof
- :name: Proof (interactive proof)
Is a no-op which is useful to delimit the sequence of tactic commands
which start a proof, after a :cmd:`Theorem` command. It is a good practice to
diff --git a/engine/evd.ml b/engine/evd.ml
index af22de5cd4..20a7c80ea0 100644
--- a/engine/evd.ml
+++ b/engine/evd.ml
@@ -842,12 +842,12 @@ let universe_rigidity evd l =
else UnivRigid
let normalize_universe evd =
- let vars = ref (UState.subst evd.universes) in
+ let vars = UState.subst evd.universes in
let normalize = Universes.normalize_universe_opt_subst vars in
normalize
let normalize_universe_instance evd l =
- let vars = ref (UState.subst evd.universes) in
+ let vars = UState.subst evd.universes in
let normalize = Universes.level_subst_of (Universes.normalize_univ_variable_opt_subst vars) in
Univ.Instance.subst_fn normalize l
diff --git a/engine/uState.ml b/engine/uState.ml
index 6c8dbe3f44..df50bae86e 100644
--- a/engine/uState.ml
+++ b/engine/uState.ml
@@ -156,7 +156,7 @@ let process_universe_constraints ctx cstrs =
let univs = ctx.uctx_universes in
let vars = ref ctx.uctx_univ_variables in
let weak = ref ctx.uctx_weak_constraints in
- let normalize = normalize_univ_variable_opt_subst vars in
+ let normalize u = normalize_univ_variable_opt_subst !vars u in
let nf_constraint = function
| ULub (u, v) -> ULub (level_subst_of normalize u, level_subst_of normalize v)
| UWeak (u, v) -> UWeak (level_subst_of normalize u, level_subst_of normalize v)
diff --git a/engine/universes.ml b/engine/universes.ml
index 938f5ad9cb..a13663cbad 100644
--- a/engine/universes.ml
+++ b/engine/universes.ml
@@ -605,31 +605,25 @@ let fresh_universe_context_set_instance ctx =
let cst' = subst_univs_level_constraints subst cst in
subst, (univs', cst')
-let normalize_univ_variable ~find ~update =
+let normalize_univ_variable ~find =
let rec aux cur =
let b = find cur in
let b' = subst_univs_universe aux b in
if Universe.equal b' b then b
- else update cur b'
+ else b'
in aux
let normalize_univ_variable_opt_subst ectx =
let find l =
- match Univ.LMap.find l !ectx with
+ match Univ.LMap.find l ectx with
| Some b -> b
| None -> raise Not_found
in
- let update l b =
- assert (match Universe.level b with Some l' -> not (Level.equal l l') | None -> true);
- try ectx := Univ.LMap.add l (Some b) !ectx; b with Not_found -> assert false
- in normalize_univ_variable ~find ~update
+ normalize_univ_variable ~find
let normalize_univ_variable_subst subst =
- let find l = Univ.LMap.find l !subst in
- let update l b =
- assert (match Universe.level b with Some l' -> not (Level.equal l l') | None -> true);
- try subst := Univ.LMap.set l b !subst; b with Not_found -> assert false in
- normalize_univ_variable ~find ~update
+ let find l = Univ.LMap.find l subst in
+ normalize_univ_variable ~find
let normalize_universe_opt_subst subst =
let normlevel = normalize_univ_variable_opt_subst subst in
@@ -640,13 +634,10 @@ let normalize_universe_subst subst =
subst_univs_universe normlevel
let normalize_opt_subst ctx =
- let ectx = ref ctx in
- let normalize = normalize_univ_variable_opt_subst ectx in
- let () =
- Univ.LMap.iter (fun u v ->
- if Option.is_empty v then ()
- else try ignore(normalize u) with Not_found -> assert(false)) ctx
- in !ectx
+ let normalize = normalize_universe_opt_subst ctx in
+ Univ.LMap.mapi (fun u -> function
+ | None -> None
+ | Some v -> Some (normalize v)) ctx
type universe_opt_subst = Universe.t option universe_map
@@ -655,7 +646,7 @@ let subst_univs_fn_puniverses f (c, u as cu) =
if u' == u then cu else (c, u')
let nf_evars_and_universes_opt_subst f subst =
- let subst = normalize_univ_variable_opt_subst (ref subst) in
+ let subst = normalize_univ_variable_opt_subst subst in
let lsubst = level_subst_of subst in
let rec aux c =
match kind c with
@@ -975,7 +966,7 @@ let normalize_context_set g ctx us algs weak =
(* Process weak constraints: when one side is flexible and the 2
universes are unrelated unify them. *)
let ctx, us, g = UPairSet.fold (fun (u,v) (ctx, us, g as acc) ->
- let norm = let us = ref us in level_subst_of (normalize_univ_variable_opt_subst us) in
+ let norm = level_subst_of (normalize_univ_variable_opt_subst us) in
let u = norm u and v = norm v in
let set_to a b =
(LSet.remove a ctx,
@@ -994,7 +985,6 @@ let normalize_context_set g ctx us algs weak =
(* Noneqs is now in canonical form w.r.t. equality constraints,
and contains only inequality constraints. *)
let noneqs =
- let us = ref us in
let norm = level_subst_of (normalize_univ_variable_opt_subst us) in
Constraint.fold (fun (u,d,v) noneqs ->
let u = norm u and v = norm v in
diff --git a/engine/universes.mli b/engine/universes.mli
index e6bee42bb3..df2e961d60 100644
--- a/engine/universes.mli
+++ b/engine/universes.mli
@@ -184,19 +184,18 @@ val normalize_univ_variables : universe_opt_subst ->
val normalize_univ_variable :
find:(Level.t -> Universe.t) ->
- update:(Level.t -> Universe.t -> Universe.t) ->
Level.t -> Universe.t
-val normalize_univ_variable_opt_subst : universe_opt_subst ref ->
+val normalize_univ_variable_opt_subst : universe_opt_subst ->
(Level.t -> Universe.t)
-val normalize_univ_variable_subst : universe_subst ref ->
+val normalize_univ_variable_subst : universe_subst ->
(Level.t -> Universe.t)
-val normalize_universe_opt_subst : universe_opt_subst ref ->
+val normalize_universe_opt_subst : universe_opt_subst ->
(Universe.t -> Universe.t)
-val normalize_universe_subst : universe_subst ref ->
+val normalize_universe_subst : universe_subst ->
(Universe.t -> Universe.t)
(** Create a fresh global in the global environment, without side effects.
diff --git a/plugins/ltac/tactic_matching.ml b/plugins/ltac/tactic_matching.ml
index b6462c8106..c949589e22 100644
--- a/plugins/ltac/tactic_matching.ml
+++ b/plugins/ltac/tactic_matching.ml
@@ -46,7 +46,7 @@ let adjust : Constr_matching.bound_ident_map * Ltac_pretype.patvar_map ->
(** Adds a binding to a {!Id.Map.t} if the identifier is [Some id] *)
let id_map_try_add id x m =
match id with
- | Some id -> Id.Map.add id x m
+ | Some id -> Id.Map.add id (Lazy.force x) m
| None -> m
(** Adds a binding to a {!Id.Map.t} if the name is [Name id] *)
diff --git a/pretyping/constr_matching.ml b/pretyping/constr_matching.ml
index 89d490a410..b4e1a1b102 100644
--- a/pretyping/constr_matching.ml
+++ b/pretyping/constr_matching.ml
@@ -427,7 +427,7 @@ let special_meta = (-1)
type matching_result =
{ m_sub : bound_ident_map * patvar_map;
- m_ctx : constr; }
+ m_ctx : constr Lazy.t; }
let mkresult s c n = IStream.Cons ( { m_sub=s; m_ctx=c; } , (IStream.thunk n) )
@@ -451,7 +451,7 @@ let authorized_occ env sigma closed pat c mk_ctx =
let subst = matches_core_closed env sigma pat c in
if closed && Id.Map.exists (fun _ c -> not (closed0 sigma c)) (snd subst)
then (fun next -> next ())
- else (fun next -> mkresult subst (mk_ctx (mkMeta special_meta)) next)
+ else (fun next -> mkresult subst (lazy (mk_ctx (mkMeta special_meta))) next)
with PatternMatchingFailure -> (fun next -> next ())
let subargs env v = Array.map_to_list (fun c -> (env, c)) v
diff --git a/pretyping/constr_matching.mli b/pretyping/constr_matching.mli
index 3c2c73915f..d19789ef42 100644
--- a/pretyping/constr_matching.mli
+++ b/pretyping/constr_matching.mli
@@ -61,7 +61,7 @@ val is_matching_head : env -> Evd.evar_map -> constr_pattern -> constr -> bool
(whose hole is denoted here with [special_meta]) *)
type matching_result =
{ m_sub : bound_ident_map * patvar_map;
- m_ctx : EConstr.t }
+ m_ctx : EConstr.t Lazy.t }
(** [match_subterm pat c] returns the substitution and the context
corresponding to each **closed** subterm of [c] matching [pat],