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vernac_classifier.ml
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vernac_classifier.ml
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(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * Copyright INRIA, CNRS and contributors *)
(* <O___,, * (see version control and CREDITS file for authors & dates) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
open CErrors
open Util
open Pp
open CAst
open Vernacextend
open Vernacexpr
let string_of_vernac_when = function
| VtLater -> "Later"
| VtNow -> "Now"
let string_of_vernac_classification = function
| VtStartProof _ -> "StartProof"
| VtSideff (_,w) -> "Sideff"^" "^(string_of_vernac_when w)
| VtQed (VtKeep VtKeepAxiom) -> "Qed(admitted)"
| VtQed (VtKeep (VtKeepOpaque | VtKeepDefined)) -> "Qed(keep)"
| VtQed VtDrop -> "Qed(drop)"
| VtProofStep { proof_block_detection } ->
"ProofStep " ^ Option.default "" proof_block_detection
| VtQuery -> "Query"
| VtMeta -> "Meta "
| VtProofMode _ -> "Proof Mode"
let vtkeep_of_opaque = function
| Opaque -> VtKeepOpaque
| Transparent -> VtKeepDefined
let idents_of_name : Names.Name.t -> Names.Id.t list =
function
| Names.Anonymous -> []
| Names.Name n -> [n]
let stm_allow_nested_proofs_option_name = ["Nested";"Proofs";"Allowed"]
let options_affecting_stm_scheduling =
[ Attributes.universe_polymorphism_option_name;
stm_allow_nested_proofs_option_name;
Synterp.proof_mode_opt_name;
Attributes.program_mode_option_name;
Proof_using.proof_using_opt_name;
]
let classify_vernac e =
let static_synterp_classifier ~atts e = match e with
(* Univ poly compatibility: we run it now, so that we can just
* look at Flags in stm.ml. Would be nicer to have the stm
* look at the entire dag to detect this option. *)
| VernacSetOption (_, l,_)
when CList.exists (CList.equal String.equal l)
options_affecting_stm_scheduling ->
VtSideff ([], VtNow)
| VernacBeginSection {v=id} -> VtSideff ([id], VtLater)
| VernacAddLoadPath _ | VernacRemoveLoadPath _ | VernacAddMLPath _
| VernacChdir _ | VernacExtraDependency _
| VernacSetOption _ -> VtSideff ([], VtLater)
(* (Local) Notations have to disappear *)
| VernacEndSegment _ -> VtSideff ([], VtNow)
(* Modules with parameters have to be executed: can import notations *)
| VernacDeclareModule (exp,{v=id},bl,_)
| VernacDefineModule (exp,{v=id},bl,_,_) ->
VtSideff ([id], if bl = [] && exp = None then VtLater else VtNow)
| VernacDeclareModuleType ({v=id},bl,_,_) ->
VtSideff ([id], if bl = [] then VtLater else VtNow)
(* These commands alter the parser *)
| VernacDeclareCustomEntry _
| VernacNotation _ | VernacReservedNotation _
| VernacRequire _ | VernacImport _ | VernacInclude _
| VernacDeclareMLModule _ -> VtSideff ([], VtNow)
| VernacProofMode pm ->
(match Pvernac.lookup_proof_mode pm with
| None ->
CErrors.user_err Pp.(str (Format.sprintf "No proof mode named \"%s\"." pm))
| Some proof_mode -> VtProofMode proof_mode)
(* Plugins should classify their commands *)
| VernacLoad _ -> VtSideff ([], VtNow)
| VernacExtend (s,l) ->
try Vernacextend.get_vernac_classifier s l
with Not_found -> anomaly(str"No classifier for"++spc()++str (fst s)++str".")
in
let static_pure_classifier ~atts e = match e with
(* Qed *)
| VernacAbort -> VtQed VtDrop
| VernacEndProof Admitted -> VtQed (VtKeep VtKeepAxiom)
| VernacEndProof (Proved (opaque,_)) -> VtQed (VtKeep (vtkeep_of_opaque opaque))
| VernacExactProof _ -> VtQed (VtKeep VtKeepOpaque)
(* Query *)
| VernacShow _ | VernacPrint _ | VernacSearch _ | VernacLocate _
| VernacGlobalCheck _ | VernacCheckMayEval _ -> VtQuery
(* ProofStep *)
| VernacProof _
| VernacFocus _ | VernacUnfocus
| VernacSubproof _
| VernacCheckGuard | VernacValidateProof
| VernacUnfocused
| VernacBullet _ ->
VtProofStep { proof_block_detection = Some "bullet" }
| VernacEndSubproof ->
VtProofStep { proof_block_detection = Some "curly" }
(* StartProof *)
| VernacDefinition ((DoDischarge,_),({v=i},_),ProveBody _) ->
VtStartProof(Doesn'tGuaranteeOpacity, idents_of_name i)
| VernacDefinition (_,({v=i},_),ProveBody _) ->
let polymorphic = Attributes.(parse_drop_extra polymorphic atts) in
let guarantee = if polymorphic then Doesn'tGuaranteeOpacity else GuaranteesOpacity in
VtStartProof(guarantee, idents_of_name i)
| VernacStartTheoremProof (_,l) ->
let polymorphic = Attributes.(parse_drop_extra polymorphic atts) in
let ids = List.map (fun (({v=i}, _), _) -> i) l in
let guarantee = if polymorphic then Doesn'tGuaranteeOpacity else GuaranteesOpacity in
VtStartProof (guarantee,ids)
| VernacFixpoint (discharge,l) ->
let polymorphic = Attributes.(parse_drop_extra polymorphic atts) in
let guarantee =
if discharge = DoDischarge || polymorphic then Doesn'tGuaranteeOpacity
else GuaranteesOpacity
in
let ids, open_proof =
List.fold_left (fun (l,b) {Vernacexpr.fname={CAst.v=id}; body_def} ->
id::l, b || body_def = None) ([],false) l in
if open_proof
then VtStartProof (guarantee,ids)
else VtSideff (ids, VtLater)
| VernacCoFixpoint (discharge,l) ->
let polymorphic = Attributes.(parse_drop_extra polymorphic atts) in
let guarantee =
if discharge = DoDischarge || polymorphic then Doesn'tGuaranteeOpacity
else GuaranteesOpacity
in
let ids, open_proof =
List.fold_left (fun (l,b) { Vernacexpr.fname={CAst.v=id}; body_def } ->
id::l, b || body_def = None) ([],false) l in
if open_proof
then VtStartProof (guarantee,ids)
else VtSideff (ids, VtLater)
(* Sideff: apply to all open branches. usually run on master only *)
| VernacAssumption (_,_,l) ->
let ids = List.flatten (List.map (fun (_,(l,_)) -> List.map (fun (id, _) -> id.v) l) l) in
VtSideff (ids, VtLater)
| VernacPrimitive ((id,_),_,_) ->
VtSideff ([id.CAst.v], VtLater)
| VernacDefinition (_,({v=id},_),DefineBody _) -> VtSideff (idents_of_name id, VtLater)
| VernacInductive (_,l) ->
let ids = List.map (fun (((_,({v=id},_)),_,_,cl),_) -> id :: match cl with
| Constructors l -> List.map (fun (_,({v=id},_)) -> id) l
| RecordDecl (oid,l,obinder) -> (match oid with Some {v=x} -> [x] | _ -> []) @
(match obinder with Some {v=x} -> [x] | _ -> []) @
CList.map_filter (function
| AssumExpr({v=Names.Name n},_,_), _ -> Some n
| _ -> None) l) l in
VtSideff (List.flatten ids, VtLater)
| VernacScheme l ->
let ids = List.map (fun {v}->v) (CList.map_filter (fun (x,_) -> x) l) in
VtSideff (ids, VtLater)
| VernacCombinedScheme ({v=id},_) -> VtSideff ([id], VtLater)
| VernacUniverse _ | VernacConstraint _
| VernacCanonical _ | VernacCoercion _ | VernacIdentityCoercion _
| VernacCreateHintDb _ | VernacRemoveHints _ | VernacHints _
| VernacArguments _
| VernacReserve _
| VernacGeneralizable _
| VernacSetOpacity _ | VernacSetStrategy _
| VernacAddOption _ | VernacRemoveOption _
| VernacMemOption _ | VernacPrintOption _
| VernacDeclareReduction _
| VernacExistingClass _ | VernacExistingInstance _
| VernacRegister _
| VernacNameSectionHypSet _
| VernacComments _
| VernacSchemeEquality _
| VernacDeclareInstance _ -> VtSideff ([], VtLater)
(* Who knows *)
| VernacOpenCloseScope _ | VernacDeclareScope _
| VernacDelimiters _ | VernacBindScope _
| VernacEnableNotation _
| VernacSyntacticDefinition _
| VernacContext _ (* TASSI: unsure *) -> VtSideff ([], VtNow)
| VernacInstance ((name,_),_,_,props,_) ->
let program, refine =
Attributes.(parse_drop_extra Notations.(program ++ Classes.refine_att) atts)
in
if program || (props <> None && not refine) then
VtSideff (idents_of_name name.CAst.v, VtLater)
else
let polymorphic = Attributes.(parse_drop_extra polymorphic atts) in
let guarantee = if polymorphic then Doesn'tGuaranteeOpacity else GuaranteesOpacity in
VtStartProof (guarantee, idents_of_name name.CAst.v)
(* Stm will install a new classifier to handle these *)
| VernacBack _ | VernacAbortAll
| VernacUndoTo _ | VernacUndo _
| VernacResetName _ | VernacResetInitial
| VernacRestart -> VtMeta
in
let static_classifier ~atts e = match e with
| VernacSynPure e -> static_pure_classifier ~atts e
| VernacSynterp e -> static_synterp_classifier ~atts e
in
let static_control_classifier ({ CAst.v ; _ } as cmd) =
(* Fail Qed or Fail Lemma must not join/fork the DAG *)
(* XXX why is Fail not always Query? *)
if Vernacprop.has_query_control cmd then
(match static_classifier ~atts:v.attrs v.expr with
| VtQuery | VtProofStep _ | VtSideff _
| VtMeta as x -> x
| VtQed _ -> VtProofStep { proof_block_detection = None }
| VtStartProof _ | VtProofMode _ -> VtQuery)
else
static_classifier ~atts:v.attrs v.expr
in
static_control_classifier e