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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(*i*)
open Pp
open Errors
open Util
open Names
open Nameops
open Term
open Termops
open Libnames
open Globnames
open Impargs
open Constrexpr
open Constrexpr_ops
open Notation_ops
open Topconstr
open Glob_term
open Glob_ops
open Pattern
open Nametab
open Notation
open Detyping
open Misctypes
open Decl_kinds
module NamedDecl = Context.Named.Declaration
(*i*)
(* Translation from glob_constr to front constr *)
(**********************************************************************)
(* Parametrization *)
(* This governs printing of local context of references *)
let print_arguments = ref false
(* If true, prints local context of evars *)
let print_evar_arguments = Detyping.print_evar_arguments
(* This governs printing of implicit arguments. When
[print_implicits] is on then [print_implicits_explicit_args] tells
how implicit args are printed. If on, implicit args are printed
with the form (id:=arg) otherwise arguments are printed normally and
the function is prefixed by "@" *)
let print_implicits = ref false
let print_implicits_explicit_args = ref false
(* Tells if implicit arguments not known to be inferable from a rigid
position are systematically printed *)
let print_implicits_defensive = ref true
(* This forces printing of coercions *)
let print_coercions = ref false
(* This forces printing universe names of Type{.} *)
let print_universes = Detyping.print_universes
(* This suppresses printing of primitive tokens (e.g. numeral) and notations *)
let print_no_symbol = ref false
(* This tells which notations still not to used if print_no_symbol is true *)
let print_non_active_notations = ref ([] : interp_rule list)
(* This governs printing of projections using the dot notation symbols *)
let print_projections = ref false
let print_meta_as_hole = ref false
let with_arguments f = Flags.with_option print_arguments f
let with_implicits f = Flags.with_option print_implicits f
let with_coercions f = Flags.with_option print_coercions f
let with_universes f = Flags.with_option print_universes f
let with_meta_as_hole f = Flags.with_option print_meta_as_hole f
let without_symbols f = Flags.with_option print_no_symbol f
let without_specific_symbols l f =
Flags.with_extra_values print_non_active_notations l f
(**********************************************************************)
(* Control printing of records *)
let is_record indsp =
try
let _ = Recordops.lookup_structure indsp in
true
with Not_found -> false
let encode_record r =
let indsp = global_inductive r in
if not (is_record indsp) then
user_err_loc (loc_of_reference r,"encode_record",
str "This type is not a structure type.");
indsp
module PrintingRecordRecord =
PrintingInductiveMake (struct
let encode = encode_record
let field = "Record"
let title = "Types leading to pretty-printing using record notation: "
let member_message s b =
str "Terms of " ++ s ++
str
(if b then " are printed using record notation"
else " are not printed using record notation")
end)
module PrintingRecordConstructor =
PrintingInductiveMake (struct
let encode = encode_record
let field = "Constructor"
let title = "Types leading to pretty-printing using constructor form: "
let member_message s b =
str "Terms of " ++ s ++
str
(if b then " are printed using constructor form"
else " are not printed using constructor form")
end)
module PrintingRecord = Goptions.MakeRefTable(PrintingRecordRecord)
module PrintingConstructor = Goptions.MakeRefTable(PrintingRecordConstructor)
(**********************************************************************)
(* Various externalisation functions *)
let insert_delimiters e = function
| None -> e
| Some sc -> CDelimiters (Loc.ghost,sc,e)
let insert_pat_delimiters loc p = function
| None -> p
| Some sc -> CPatDelimiters (loc,sc,p)
let insert_pat_alias loc p = function
| Anonymous -> p
| Name id -> CPatAlias (loc,p,id)
(**********************************************************************)
(* conversion of references *)
let extern_evar loc n l = CEvar (loc,n,l)
(** We allow customization of the global_reference printer.
For instance, in the debugger the tables of global references
may be inaccurate *)
let safe_shortest_qualid_of_global vars r =
try shortest_qualid_of_global vars r
with Not_found ->
match r with
| VarRef v -> make_qualid DirPath.empty v
| ConstRef c -> make_qualid DirPath.empty Names.(Label.to_id (con_label c))
| IndRef (i,_) | ConstructRef ((i,_),_) ->
make_qualid DirPath.empty Names.(Label.to_id (mind_label i))
let default_extern_reference loc vars r =
Qualid (loc,safe_shortest_qualid_of_global vars r)
let my_extern_reference = ref default_extern_reference
let set_extern_reference f = my_extern_reference := f
let get_extern_reference () = !my_extern_reference
let extern_reference loc vars l = !my_extern_reference loc vars l
(**********************************************************************)
(* mapping patterns to cases_pattern_expr *)
let add_patt_for_params ind l =
if !Flags.in_debugger then l else
Util.List.addn (Inductiveops.inductive_nparamdecls ind) (CPatAtom (Loc.ghost,None)) l
let add_cpatt_for_params ind l =
if !Flags.in_debugger then l else
Util.List.addn (Inductiveops.inductive_nparamdecls ind) (PatVar (Loc.ghost,Anonymous)) l
let drop_implicits_in_patt cst nb_expl args =
let impl_st = (implicits_of_global cst) in
let impl_data = extract_impargs_data impl_st in
let rec impls_fit l = function
|[],t -> Some (List.rev_append l t)
|_,[] -> None
|h::t,CPatAtom(_,None)::tt when is_status_implicit h -> impls_fit l (t,tt)
|h::_,_ when is_status_implicit h -> None
|_::t,hh::tt -> impls_fit (hh::l) (t,tt)
in let rec aux = function
|[] -> None
|(_,imps)::t -> match impls_fit [] (imps,args) with
|None -> aux t
|x -> x
in
if Int.equal nb_expl 0 then aux impl_data
else
let imps = List.skipn_at_least nb_expl (select_stronger_impargs impl_st) in
impls_fit [] (imps,args)
let has_curly_brackets ntn =
String.length ntn >= 6 && (String.is_sub "{ _ } " ntn 0 ||
String.is_sub " { _ }" ntn (String.length ntn - 6) ||
String.string_contains ~where:ntn ~what:" { _ } ")
let rec wildcards ntn n =
if Int.equal n (String.length ntn) then []
else let l = spaces ntn (n+1) in if ntn.[n] == '_' then n::l else l
and spaces ntn n =
if Int.equal n (String.length ntn) then []
else if ntn.[n] == ' ' then wildcards ntn (n+1) else spaces ntn (n+1)
let expand_curly_brackets loc mknot ntn l =
let ntn' = ref ntn in
let rec expand_ntn i =
function
| [] -> []
| a::l ->
let a' =
let p = List.nth (wildcards !ntn' 0) i - 2 in
if p>=0 && p+5 <= String.length !ntn' && String.is_sub "{ _ }" !ntn' p
then begin
ntn' :=
String.sub !ntn' 0 p ^ "_" ^
String.sub !ntn' (p+5) (String.length !ntn' -p-5);
mknot (loc,"{ _ }",[a]) end
else a in
a' :: expand_ntn (i+1) l in
let l = expand_ntn 0 l in
(* side effect *)
mknot (loc,!ntn',l)
let destPrim = function CPrim(_,t) -> Some t | _ -> None
let destPatPrim = function CPatPrim(_,t) -> Some t | _ -> None
let make_notation_gen loc ntn mknot mkprim destprim l =
if has_curly_brackets ntn
then expand_curly_brackets loc mknot ntn l
else match ntn,List.map destprim l with
(* Special case to avoid writing "- 3" for e.g. (Z.opp 3) *)
| "- _", [Some (Numeral p)] when Bigint.is_strictly_pos p ->
mknot (loc,ntn,([mknot (loc,"( _ )",l)]))
| _ ->
match decompose_notation_key ntn, l with
| [Terminal "-"; Terminal x], [] ->
(try mkprim (loc, Numeral (Bigint.neg (Bigint.of_string x)))
with Failure _ -> mknot (loc,ntn,[]))
| [Terminal x], [] ->
(try mkprim (loc, Numeral (Bigint.of_string x))
with Failure _ -> mknot (loc,ntn,[]))
| _ ->
mknot (loc,ntn,l)
let make_notation loc ntn (terms,termlists,binders as subst) =
if not (List.is_empty termlists) || not (List.is_empty binders) then
CNotation (loc,ntn,subst)
else
make_notation_gen loc ntn
(fun (loc,ntn,l) -> CNotation (loc,ntn,(l,[],[])))
(fun (loc,p) -> CPrim (loc,p))
destPrim terms
let make_pat_notation loc ntn (terms,termlists as subst) args =
if not (List.is_empty termlists) then CPatNotation (loc,ntn,subst,args) else
make_notation_gen loc ntn
(fun (loc,ntn,l) -> CPatNotation (loc,ntn,(l,[]),args))
(fun (loc,p) -> CPatPrim (loc,p))
destPatPrim terms
let mkPat loc qid l =
(* Normally irrelevant test with v8 syntax, but let's do it anyway *)
if List.is_empty l then CPatAtom (loc,Some qid) else CPatCstr (loc,qid,None,l)
let pattern_printable_in_both_syntax (ind,_ as c) =
let impl_st = extract_impargs_data (implicits_of_global (ConstructRef c)) in
let nb_params = Inductiveops.inductive_nparams ind in
List.exists (fun (_,impls) ->
(List.length impls >= nb_params) &&
let params,args = Util.List.chop nb_params impls in
(List.for_all is_status_implicit params)&&(List.for_all (fun x -> not (is_status_implicit x)) args)
) impl_st
(* Better to use extern_glob_constr composed with injection/retraction ?? *)
let rec extern_cases_pattern_in_scope (scopes:local_scopes) vars pat =
(* pboutill: There are letins in pat which is incompatible with notations and
not explicit application. *)
match pat with
| PatCstr(loc,cstrsp,args,na)
when !Flags.in_debugger||Inductiveops.constructor_has_local_defs cstrsp ->
let c = extern_reference loc Id.Set.empty (ConstructRef cstrsp) in
let args = List.map (extern_cases_pattern_in_scope scopes vars) args in
CPatCstr (loc, c, Some (add_patt_for_params (fst cstrsp) args), [])
| _ ->
try
if !Flags.raw_print || !print_no_symbol then raise No_match;
let (na,sc,p) = uninterp_prim_token_cases_pattern pat in
match availability_of_prim_token p sc scopes with
| None -> raise No_match
| Some key ->
let loc = cases_pattern_loc pat in
insert_pat_alias loc (insert_pat_delimiters loc (CPatPrim(loc,p)) key) na
with No_match ->
try
if !Flags.raw_print || !print_no_symbol then raise No_match;
extern_notation_pattern scopes vars pat
(uninterp_cases_pattern_notations pat)
with No_match ->
match pat with
| PatVar (loc,Name id) -> CPatAtom (loc,Some (Ident (loc,id)))
| PatVar (loc,Anonymous) -> CPatAtom (loc, None)
| PatCstr(loc,cstrsp,args,na) ->
let args = List.map (extern_cases_pattern_in_scope scopes vars) args in
let p =
try
if !Flags.raw_print then raise Exit;
let projs = Recordops.lookup_projections (fst cstrsp) in
let rec ip projs args acc =
match projs with
| [] -> acc
| None :: q -> ip q args acc
| Some c :: q ->
match args with
| [] -> raise No_match
| CPatAtom(_, None) :: tail -> ip q tail acc
(* we don't want to have 'x = _' in our patterns *)
| head :: tail -> ip q tail
((extern_reference loc Id.Set.empty (ConstRef c), head) :: acc)
in
CPatRecord(loc, List.rev (ip projs args []))
with
Not_found | No_match | Exit ->
let c = extern_reference loc Id.Set.empty (ConstructRef cstrsp) in
if !Topconstr.asymmetric_patterns then
if pattern_printable_in_both_syntax cstrsp
then CPatCstr (loc, c, None, args)
else CPatCstr (loc, c, Some (add_patt_for_params (fst cstrsp) args), [])
else
let full_args = add_patt_for_params (fst cstrsp) args in
match drop_implicits_in_patt (ConstructRef cstrsp) 0 full_args with
|Some true_args -> CPatCstr (loc, c, None, true_args)
|None -> CPatCstr (loc, c, Some full_args, [])
in insert_pat_alias loc p na
and apply_notation_to_pattern loc gr ((subst,substlist),(nb_to_drop,more_args))
(tmp_scope, scopes as allscopes) vars =
function
| NotationRule (sc,ntn) ->
begin
match availability_of_notation (sc,ntn) allscopes with
(* Uninterpretation is not allowed in current context *)
| None -> raise No_match
(* Uninterpretation is allowed in current context *)
| Some (scopt,key) ->
let scopes' = Option.List.cons scopt scopes in
let l =
List.map (fun (c,(scopt,scl)) ->
extern_cases_pattern_in_scope (scopt,scl@scopes') vars c)
subst in
let ll =
List.map (fun (c,(scopt,scl)) ->
let subscope = (scopt,scl@scopes') in
List.map (extern_cases_pattern_in_scope subscope vars) c)
substlist in
let l2 = List.map (extern_cases_pattern_in_scope allscopes vars) more_args in
let l2' = if !Topconstr.asymmetric_patterns || not (List.is_empty ll) then l2
else
match drop_implicits_in_patt gr nb_to_drop l2 with
|Some true_args -> true_args
|None -> raise No_match
in
insert_pat_delimiters loc
(make_pat_notation loc ntn (l,ll) l2') key
end
| SynDefRule kn ->
let qid = Qualid (loc, shortest_qualid_of_syndef vars kn) in
let l1 =
List.rev_map (fun (c,(scopt,scl)) ->
extern_cases_pattern_in_scope (scopt,scl@scopes) vars c)
subst in
let l2 = List.map (extern_cases_pattern_in_scope allscopes vars) more_args in
let l2' = if !Topconstr.asymmetric_patterns then l2
else
match drop_implicits_in_patt gr (nb_to_drop + List.length l1) l2 with
|Some true_args -> true_args
|None -> raise No_match
in
assert (List.is_empty substlist);
mkPat loc qid (List.rev_append l1 l2')
and extern_notation_pattern (tmp_scope,scopes as allscopes) vars t = function
| [] -> raise No_match
| (keyrule,pat,n as _rule)::rules ->
try
if List.mem keyrule !print_non_active_notations then raise No_match;
match t with
| PatCstr (loc,cstr,_,na) ->
let p = apply_notation_to_pattern loc (ConstructRef cstr)
(match_notation_constr_cases_pattern t pat) allscopes vars keyrule in
insert_pat_alias loc p na
| PatVar (loc,Anonymous) -> CPatAtom (loc, None)
| PatVar (loc,Name id) -> CPatAtom (loc, Some (Ident (loc,id)))
with
No_match -> extern_notation_pattern allscopes vars t rules
let rec extern_notation_ind_pattern allscopes vars ind args = function
| [] -> raise No_match
| (keyrule,pat,n as _rule)::rules ->
try
if List.mem keyrule !print_non_active_notations then raise No_match;
apply_notation_to_pattern Loc.ghost (IndRef ind)
(match_notation_constr_ind_pattern ind args pat) allscopes vars keyrule
with
No_match -> extern_notation_ind_pattern allscopes vars ind args rules
let extern_ind_pattern_in_scope (scopes:local_scopes) vars ind args =
(* pboutill: There are letins in pat which is incompatible with notations and
not explicit application. *)
if !Flags.in_debugger||Inductiveops.inductive_has_local_defs ind then
let c = extern_reference Loc.ghost vars (IndRef ind) in
let args = List.map (extern_cases_pattern_in_scope scopes vars) args in
CPatCstr (Loc.ghost, c, Some (add_patt_for_params ind args), [])
else
try
if !Flags.raw_print || !print_no_symbol then raise No_match;
let (sc,p) = uninterp_prim_token_ind_pattern ind args in
match availability_of_prim_token p sc scopes with
| None -> raise No_match
| Some key ->
insert_pat_delimiters Loc.ghost (CPatPrim(Loc.ghost,p)) key
with No_match ->
try
if !Flags.raw_print || !print_no_symbol then raise No_match;
extern_notation_ind_pattern scopes vars ind args
(uninterp_ind_pattern_notations ind)
with No_match ->
let c = extern_reference Loc.ghost vars (IndRef ind) in
let args = List.map (extern_cases_pattern_in_scope scopes vars) args in
match drop_implicits_in_patt (IndRef ind) 0 args with
|Some true_args -> CPatCstr (Loc.ghost, c, None, true_args)
|None -> CPatCstr (Loc.ghost, c, Some args, [])
let extern_cases_pattern vars p =
extern_cases_pattern_in_scope (None,[]) vars p
(**********************************************************************)
(* Externalising applications *)
let occur_name na aty =
match na with
| Name id -> occur_var_constr_expr id aty
| Anonymous -> false
let is_projection nargs = function
| Some r when not !Flags.in_debugger && not !Flags.raw_print && !print_projections ->
(try
let n = Recordops.find_projection_nparams r + 1 in
if n <= nargs then Some n
else None
with Not_found -> None)
| _ -> None
let is_hole = function CHole _ | CEvar _ -> true | _ -> false
let is_significant_implicit a =
not (is_hole a)
let is_needed_for_correct_partial_application tail imp =
List.is_empty tail && not (maximal_insertion_of imp)
exception Expl
(* Implicit args indexes are in ascending order *)
(* inctx is useful only if there is a last argument to be deduced from ctxt *)
let explicitize loc inctx impl (cf,f) args =
let impl = if !Constrintern.parsing_explicit then [] else impl in
let n = List.length args in
let rec exprec q = function
| a::args, imp::impl when is_status_implicit imp ->
let tail = exprec (q+1) (args,impl) in
let visible =
!Flags.raw_print ||
(!print_implicits && !print_implicits_explicit_args) ||
(is_needed_for_correct_partial_application tail imp) ||
(!print_implicits_defensive &&
(not (is_inferable_implicit inctx n imp) || !Flags.beautify_file) &&
is_significant_implicit (Lazy.force a))
in
if visible then
(Lazy.force a,Some (Loc.ghost, ExplByName (name_of_implicit imp))) :: tail
else
tail
| a::args, _::impl -> (Lazy.force a,None) :: exprec (q+1) (args,impl)
| args, [] -> List.map (fun a -> (Lazy.force a,None)) args (*In case of polymorphism*)
| [], (imp :: _) when is_status_implicit imp && maximal_insertion_of imp ->
(* The non-explicit application cannot be parsed back with the same type *)
raise Expl
| [], _ -> []
in
let ip = is_projection (List.length args) cf in
let expl () =
match ip with
| Some i ->
if not (List.is_empty impl) && is_status_implicit (List.nth impl (i-1)) then
raise Expl
else
let (args1,args2) = List.chop i args in
let (impl1,impl2) = if List.is_empty impl then [],[] else List.chop i impl in
let args1 = exprec 1 (args1,impl1) in
let args2 = exprec (i+1) (args2,impl2) in
let ip = Some (List.length args1) in
CApp (loc,(ip,f),args1@args2)
| None ->
let args = exprec 1 (args,impl) in
if List.is_empty args then f else CApp (loc, (None, f), args)
in
try expl ()
with Expl ->
let f',us = match f with CRef (f,us) -> f,us | _ -> assert false in
let ip = if !print_projections then ip else None in
CAppExpl (loc, (ip, f', us), List.map Lazy.force args)
let is_start_implicit = function
| imp :: _ -> is_status_implicit imp && maximal_insertion_of imp
| [] -> false
let extern_global loc impl f us =
if not !Constrintern.parsing_explicit && is_start_implicit impl
then
CAppExpl (loc, (None, f, us), [])
else
CRef (f,us)
let extern_app loc inctx impl (cf,f) us args =
if List.is_empty args then
(* If coming from a notation "Notation a := @b" *)
CAppExpl (loc, (None, f, us), [])
else if not !Constrintern.parsing_explicit &&
((!Flags.raw_print ||
(!print_implicits && not !print_implicits_explicit_args)) &&
List.exists is_status_implicit impl)
then
let args = List.map Lazy.force args in
CAppExpl (loc, (is_projection (List.length args) cf,f,us), args)
else
explicitize loc inctx impl (cf,CRef (f,us)) args
let rec fill_arg_scopes args subscopes scopes = match args, subscopes with
| [], _ -> []
| a :: args, scopt :: subscopes ->
(a, (scopt, scopes)) :: fill_arg_scopes args subscopes scopes
| a :: args, [] ->
(a, (None, scopes)) :: fill_arg_scopes args [] scopes
let extern_args extern env args =
let map (arg, argscopes) = lazy (extern argscopes env arg) in
List.map map args
let match_coercion_app = function
| GApp (loc,GRef (_,r,_),args) -> Some (loc, r, 0, args)
| _ -> None
let rec remove_coercions inctx c =
match match_coercion_app c with
| Some (loc,r,pars,args) when not (!Flags.raw_print || !print_coercions) ->
let nargs = List.length args in
(try match Classops.hide_coercion r with
| Some n when (n - pars) < nargs && (inctx || (n - pars)+1 < nargs) ->
(* We skip a coercion *)
let l = List.skipn (n - pars) args in
let (a,l) = match l with a::l -> (a,l) | [] -> assert false in
(* Recursively remove the head coercions *)
let a' = remove_coercions true a in
(* Don't flatten App's in case of funclass so that
(atomic) notations on [a] work; should be compatible
since printer does not care whether App's are
collapsed or not and notations with an implicit
coercion using funclass either would have already
been confused with ordinary application or would have need
a surrounding context and the coercion to funclass would
have been made explicit to match *)
if List.is_empty l then a' else GApp (loc,a',l)
| _ -> c
with Not_found -> c)
| _ -> c
let rec flatten_application = function
| GApp (loc,GApp(_,a,l'),l) -> flatten_application (GApp (loc,a,l'@l))
| a -> a
(**********************************************************************)
(* mapping glob_constr to numerals (in presence of coercions, choose the *)
(* one with no delimiter if possible) *)
let extern_possible_prim_token scopes r =
try
let (sc,n) = uninterp_prim_token r in
match availability_of_prim_token n sc scopes with
| None -> None
| Some key -> Some (insert_delimiters (CPrim (loc_of_glob_constr r,n)) key)
with No_match ->
None
let extern_optimal_prim_token scopes r r' =
let c = extern_possible_prim_token scopes r in
let c' = if r==r' then None else extern_possible_prim_token scopes r' in
match c,c' with
| Some n, (Some (CDelimiters _) | None) | _, Some n -> n
| _ -> raise No_match
(**********************************************************************)
(* mapping glob_constr to constr_expr *)
let extern_glob_sort = function
| GProp -> GProp
| GSet -> GSet
| GType _ as s when !print_universes -> s
| GType _ -> GType []
let extern_universes = function
| Some _ as l when !print_universes -> l
| _ -> None
let rec extern inctx scopes vars r =
let r' = remove_coercions inctx r in
try
if !Flags.raw_print || !print_no_symbol then raise No_match;
extern_optimal_prim_token scopes r r'
with No_match ->
try
let r'' = flatten_application r' in
if !Flags.raw_print || !print_no_symbol then raise No_match;
extern_notation scopes vars r'' (uninterp_notations r'')
with No_match -> match r' with
| GRef (loc,ref,us) ->
extern_global loc (select_stronger_impargs (implicits_of_global ref))
(extern_reference loc vars ref) (extern_universes us)
| GVar (loc,id) -> CRef (Ident (loc,id),None)
| GEvar (loc,n,[]) when !print_meta_as_hole -> CHole (loc, None, Misctypes.IntroAnonymous, None)
| GEvar (loc,n,l) ->
extern_evar loc n (List.map (on_snd (extern false scopes vars)) l)
| GPatVar (loc,(b,n)) ->
if !print_meta_as_hole then CHole (loc, None, Misctypes.IntroAnonymous, None) else
if b then CPatVar (loc,n) else CEvar (loc,n,[])
| GApp (loc,f,args) ->
(match f with
| GRef (rloc,ref,us) ->
let subscopes = find_arguments_scope ref in
let args = fill_arg_scopes args subscopes (snd scopes) in
begin
try
if !Flags.raw_print then raise Exit;
let cstrsp = match ref with ConstructRef c -> c | _ -> raise Not_found in
let struc = Recordops.lookup_structure (fst cstrsp) in
if PrintingRecord.active (fst cstrsp) then
()
else if PrintingConstructor.active (fst cstrsp) then
raise Exit
else if not !Flags.record_print then
raise Exit;
let projs = struc.Recordops.s_PROJ in
let locals = struc.Recordops.s_PROJKIND in
let rec cut args n =
if Int.equal n 0 then args
else
match args with
| [] -> raise No_match
| _ :: t -> cut t (n - 1) in
let args = cut args struc.Recordops.s_EXPECTEDPARAM in
let rec ip projs locs args acc =
match projs with
| [] -> acc
| None :: q -> raise No_match
| Some c :: q ->
match locs with
| [] -> anomaly (Pp.str "projections corruption [Constrextern.extern]")
| (_, false) :: locs' ->
(* we don't want to print locals *)
ip q locs' args acc
| (_, true) :: locs' ->
match args with
| [] -> raise No_match
(* we give up since the constructor is not complete *)
| (arg, scopes) :: tail ->
let head = extern true scopes vars arg in
ip q locs' tail ((extern_reference loc Id.Set.empty (ConstRef c), head) :: acc)
in
CRecord (loc, List.rev (ip projs locals args []))
with
| Not_found | No_match | Exit ->
let args = extern_args (extern true) vars args in
extern_app loc inctx
(select_stronger_impargs (implicits_of_global ref))
(Some ref,extern_reference rloc vars ref) (extern_universes us) args
end
| _ ->
explicitize loc inctx [] (None,sub_extern false scopes vars f)
(List.map (fun c -> lazy (sub_extern true scopes vars c)) args))
| GLetIn (loc,na,t,c) ->
CLetIn (loc,(loc,na),sub_extern false scopes vars t,
extern inctx scopes (add_vname vars na) c)
| GProd (loc,na,bk,t,c) ->
let t = extern_typ scopes vars t in
let (idl,c) = factorize_prod scopes (add_vname vars na) na bk t c in
CProdN (loc,[(Loc.ghost,na)::idl,Default bk,t],c)
| GLambda (loc,na,bk,t,c) ->
let t = extern_typ scopes vars t in
let (idl,c) = factorize_lambda inctx scopes (add_vname vars na) na bk t c in
CLambdaN (loc,[(Loc.ghost,na)::idl,Default bk,t],c)
| GCases (loc,sty,rtntypopt,tml,eqns) ->
let vars' =
List.fold_right (name_fold Id.Set.add)
(cases_predicate_names tml) vars in
let rtntypopt' = Option.map (extern_typ scopes vars') rtntypopt in
let tml = List.map (fun (tm,(na,x)) ->
let na' = match na,tm with
| Anonymous, GVar (_, id) ->
begin match rtntypopt with
| None -> None
| Some ntn ->
if occur_glob_constr id ntn then
Some (Loc.ghost, Anonymous)
else None
end
| Anonymous, _ -> None
| Name id, GVar (_,id') when Id.equal id id' -> None
| Name _, _ -> Some (Loc.ghost,na) in
(sub_extern false scopes vars tm,
na',
Option.map (fun (loc,ind,nal) ->
let args = List.map (fun x -> PatVar (Loc.ghost, x)) nal in
let fullargs = add_cpatt_for_params ind args in
extern_ind_pattern_in_scope scopes vars ind fullargs
) x))
tml
in
let eqns = List.map (extern_eqn inctx scopes vars) eqns in
CCases (loc,sty,rtntypopt',tml,eqns)
| GLetTuple (loc,nal,(na,typopt),tm,b) ->
CLetTuple (loc,List.map (fun na -> (Loc.ghost,na)) nal,
(Option.map (fun _ -> (Loc.ghost,na)) typopt,
Option.map (extern_typ scopes (add_vname vars na)) typopt),
sub_extern false scopes vars tm,
extern inctx scopes (List.fold_left add_vname vars nal) b)
| GIf (loc,c,(na,typopt),b1,b2) ->
CIf (loc,sub_extern false scopes vars c,
(Option.map (fun _ -> (Loc.ghost,na)) typopt,
Option.map (extern_typ scopes (add_vname vars na)) typopt),
sub_extern inctx scopes vars b1, sub_extern inctx scopes vars b2)
| GRec (loc,fk,idv,blv,tyv,bv) ->
let vars' = Array.fold_right Id.Set.add idv vars in
(match fk with
| GFix (nv,n) ->
let listdecl =
Array.mapi (fun i fi ->
let (bl,ty,def) = blv.(i), tyv.(i), bv.(i) in
let (assums,ids,bl) = extern_local_binder scopes vars bl in
let vars0 = List.fold_right (name_fold Id.Set.add) ids vars in
let vars1 = List.fold_right (name_fold Id.Set.add) ids vars' in
let n =
match fst nv.(i) with
| None -> None
| Some x -> Some (Loc.ghost, out_name (List.nth assums x))
in
let ro = extern_recursion_order scopes vars (snd nv.(i)) in
((Loc.ghost, fi), (n, ro), bl, extern_typ scopes vars0 ty,
extern false scopes vars1 def)) idv
in
CFix (loc,(loc,idv.(n)),Array.to_list listdecl)
| GCoFix n ->
let listdecl =
Array.mapi (fun i fi ->
let (_,ids,bl) = extern_local_binder scopes vars blv.(i) in
let vars0 = List.fold_right (name_fold Id.Set.add) ids vars in
let vars1 = List.fold_right (name_fold Id.Set.add) ids vars' in
((Loc.ghost, fi),bl,extern_typ scopes vars0 tyv.(i),
sub_extern false scopes vars1 bv.(i))) idv
in
CCoFix (loc,(loc,idv.(n)),Array.to_list listdecl))
| GSort (loc,s) -> CSort (loc,extern_glob_sort s)
| GHole (loc,e,naming,_) -> CHole (loc, Some e, naming, None) (** TODO: extern tactics. *)
| GCast (loc,c, c') ->
CCast (loc,sub_extern true scopes vars c,
Miscops.map_cast_type (extern_typ scopes vars) c')
and extern_typ (_,scopes) =
extern true (Notation.current_type_scope_name (),scopes)
and sub_extern inctx (_,scopes) = extern inctx (None,scopes)
and factorize_prod scopes vars na bk aty c =
let c = extern_typ scopes vars c in
match na, c with
| Name id, CProdN (loc,[nal,Default bk',ty],c)
when binding_kind_eq bk bk' && constr_expr_eq aty ty
&& not (occur_var_constr_expr id ty) (* avoid na in ty escapes scope *) ->
nal,c
| _ ->
[],c
and factorize_lambda inctx scopes vars na bk aty c =
let c = sub_extern inctx scopes vars c in
match c with
| CLambdaN (loc,[nal,Default bk',ty],c)
when binding_kind_eq bk bk' && constr_expr_eq aty ty
&& not (occur_name na ty) (* avoid na in ty escapes scope *) ->
nal,c
| _ ->
[],c
and extern_local_binder scopes vars = function
[] -> ([],[],[])
| (na,bk,Some bd,ty)::l ->
let (assums,ids,l) =
extern_local_binder scopes (name_fold Id.Set.add na vars) l in
(assums,na::ids,
LocalRawDef((Loc.ghost,na), extern false scopes vars bd) :: l)
| (na,bk,None,ty)::l ->
let ty = extern_typ scopes vars ty in
(match extern_local_binder scopes (name_fold Id.Set.add na vars) l with
(assums,ids,LocalRawAssum(nal,k,ty')::l)
when constr_expr_eq ty ty' &&
match na with Name id -> not (occur_var_constr_expr id ty')
| _ -> true ->
(na::assums,na::ids,
LocalRawAssum((Loc.ghost,na)::nal,k,ty')::l)
| (assums,ids,l) ->
(na::assums,na::ids,
LocalRawAssum([(Loc.ghost,na)],Default bk,ty) :: l))
and extern_eqn inctx scopes vars (loc,ids,pl,c) =
(loc,[loc,List.map (extern_cases_pattern_in_scope scopes vars) pl],
extern inctx scopes vars c)
and extern_notation (tmp_scope,scopes as allscopes) vars t = function
| [] -> raise No_match
| (keyrule,pat,n as _rule)::rules ->
let loc = Glob_ops.loc_of_glob_constr t in
try
if List.mem keyrule !print_non_active_notations then raise No_match;
(* Adjusts to the number of arguments expected by the notation *)
let (t,args,argsscopes,argsimpls) = match t,n with
| GApp (_,f,args), Some n
when List.length args >= n ->
let args1, args2 = List.chop n args in
let subscopes, impls =
match f with
| GRef (_,ref,us) ->
let subscopes =
try List.skipn n (find_arguments_scope ref)
with Failure _ -> [] in
let impls =
let impls =
select_impargs_size
(List.length args) (implicits_of_global ref) in
try List.skipn n impls with Failure _ -> [] in
subscopes,impls
| _ ->
[], [] in
(if Int.equal n 0 then f else GApp (Loc.ghost,f,args1)),
args2, subscopes, impls
| GApp (_,(GRef (_,ref,us) as f),args), None ->
let subscopes = find_arguments_scope ref in
let impls =
select_impargs_size
(List.length args) (implicits_of_global ref) in
f, args, subscopes, impls
| GRef (_,ref,us), Some 0 -> GApp (Loc.ghost,t,[]), [], [], []
| _, None -> t, [], [], []
| _ -> raise No_match in
(* Try matching ... *)
let terms,termlists,binders =
match_notation_constr !print_universes t pat in
(* Try availability of interpretation ... *)
let e =
match keyrule with
| NotationRule (sc,ntn) ->
(match availability_of_notation (sc,ntn) allscopes with
(* Uninterpretation is not allowed in current context *)
| None -> raise No_match
(* Uninterpretation is allowed in current context *)
| Some (scopt,key) ->
let scopes' = Option.List.cons scopt scopes in
let l =
List.map (fun (c,(scopt,scl)) ->
extern (* assuming no overloading: *) true
(scopt,scl@scopes') vars c)
terms in
let ll =
List.map (fun (c,(scopt,scl)) ->
List.map (extern true (scopt,scl@scopes') vars) c)
termlists in
let bll =
List.map (fun (bl,(scopt,scl)) ->
pi3 (extern_local_binder (scopt,scl@scopes') vars bl))
binders in
insert_delimiters (make_notation loc ntn (l,ll,bll)) key)
| SynDefRule kn ->
let l =
List.map (fun (c,(scopt,scl)) ->
extern true (scopt,scl@scopes) vars c, None)
terms in
let a = CRef (Qualid (loc, shortest_qualid_of_syndef vars kn),None) in
if List.is_empty l then a else CApp (loc,(None,a),l) in
if List.is_empty args then e
else
let args = fill_arg_scopes args argsscopes scopes in
let args = extern_args (extern true) vars args in
explicitize loc false argsimpls (None,e) args
with
No_match -> extern_notation allscopes vars t rules
and extern_recursion_order scopes vars = function
GStructRec -> CStructRec
| GWfRec c -> CWfRec (extern true scopes vars c)
| GMeasureRec (m,r) -> CMeasureRec (extern true scopes vars m,
Option.map (extern true scopes vars) r)
let extern_glob_constr vars c =
extern false (None,[]) vars c
let extern_glob_type vars c =
extern_typ (None,[]) vars c
(******************************************************************)
(* Main translation function from constr -> constr_expr *)
let loc = Loc.ghost (* for constr and pattern, locations are lost *)
let extern_constr_gen lax goal_concl_style scopt env sigma t =
(* "goal_concl_style" means do alpha-conversion using the "goal" convention *)
(* i.e.: avoid using the names of goal/section/rel variables and the short *)
(* names of global definitions of current module when computing names for *)
(* bound variables. *)
(* Not "goal_concl_style" means do alpha-conversion avoiding only *)
(* those goal/section/rel variables that occurs in the subterm under *)
(* consideration; see namegen.ml for further details *)
let avoid = if goal_concl_style then ids_of_context env else [] in
let r = Detyping.detype ~lax:lax goal_concl_style avoid env sigma t in
let vars = vars_of_env env in
extern false (scopt,[]) vars r
let extern_constr_in_scope goal_concl_style scope env sigma t =
extern_constr_gen false goal_concl_style (Some scope) env sigma t
let extern_constr ?(lax=false) goal_concl_style env sigma t =
extern_constr_gen lax goal_concl_style None env sigma t
let extern_type goal_concl_style env sigma t =
let avoid = if goal_concl_style then ids_of_context env else [] in
let r = Detyping.detype goal_concl_style avoid env sigma t in
extern_glob_type (vars_of_env env) r
let extern_sort sigma s = extern_glob_sort (detype_sort sigma s)
let extern_closed_glob ?lax goal_concl_style env sigma t =
let avoid = if goal_concl_style then ids_of_context env else [] in
let r =
Detyping.detype_closed_glob ?lax goal_concl_style avoid env sigma t
in
let vars = vars_of_env env in
extern false (None,[]) vars r
(******************************************************************)
(* Main translation function from pattern -> constr_expr *)
let any_any_branch =
(* | _ => _ *)
(loc,[],[PatVar (loc,Anonymous)],GHole (loc,Evar_kinds.InternalHole,Misctypes.IntroAnonymous,None))
let rec glob_of_pat env sigma = function
| PRef ref -> GRef (loc,ref,None)
| PVar id -> GVar (loc,id)
| PEvar (evk,l) ->
let test decl = function PVar id' -> Id.equal (NamedDecl.get_id decl) id' | _ -> false in
let l = Evd.evar_instance_array test (Evd.find sigma evk) l in
let id = match Evd.evar_ident evk sigma with
| None -> Id.of_string "__"
| Some id -> id
in
GEvar (loc,id,List.map (on_snd (glob_of_pat env sigma)) l)
| PRel n ->
let id = try match lookup_name_of_rel n env with
| Name id -> id
| Anonymous ->
anomaly ~label:"glob_constr_of_pattern" (Pp.str "index to an anonymous variable")
with Not_found -> Id.of_string ("_UNBOUND_REL_"^(string_of_int n)) in
GVar (loc,id)
| PMeta None -> GHole (loc,Evar_kinds.InternalHole, Misctypes.IntroAnonymous,None)
| PMeta (Some n) -> GPatVar (loc,(false,n))
| PProj (p,c) -> GApp (loc,GRef (loc, ConstRef (Projection.constant p),None),
[glob_of_pat env sigma c])
| PApp (f,args) ->
GApp (loc,glob_of_pat env sigma f,Array.map_to_list (glob_of_pat env sigma) args)
| PSoApp (n,args) ->
GApp (loc,GPatVar (loc,(true,n)),
List.map (glob_of_pat env sigma) args)
| PProd (na,t,c) ->
GProd (loc,na,Explicit,glob_of_pat env sigma t,glob_of_pat (na::env) sigma c)
| PLetIn (na,t,c) ->
GLetIn (loc,na,glob_of_pat env sigma t, glob_of_pat (na::env) sigma c)
| PLambda (na,t,c) ->
GLambda (loc,na,Explicit,glob_of_pat env sigma t, glob_of_pat (na::env) sigma c)
| PIf (c,b1,b2) ->
GIf (loc, glob_of_pat env sigma c, (Anonymous,None),
glob_of_pat env sigma b1, glob_of_pat env sigma b2)
| PCase ({cip_style=LetStyle; cip_ind_tags=None},PMeta None,tm,[(0,n,b)]) ->
let nal,b = it_destRLambda_or_LetIn_names n (glob_of_pat env sigma b) in
GLetTuple (loc,nal,(Anonymous,None),glob_of_pat env sigma tm,b)
| PCase (info,p,tm,bl) ->
let mat = match bl, info.cip_ind with
| [], _ -> []
| _, Some ind ->
let bl' = List.map (fun (i,n,c) -> (i,n,glob_of_pat env sigma c)) bl in
simple_cases_matrix_of_branches ind bl'
| _, None -> anomaly (Pp.str "PCase with some branches but unknown inductive")
in
let mat = if info.cip_extensible then mat @ [any_any_branch] else mat
in
let indnames,rtn = match p, info.cip_ind, info.cip_ind_tags with
| PMeta None, _, _ -> (Anonymous,None),None
| _, Some ind, Some nargs ->
return_type_of_predicate ind nargs (glob_of_pat env sigma p)
| _ -> anomaly (Pp.str "PCase with non-trivial predicate but unknown inductive")
in
GCases (loc,RegularStyle,rtn,[glob_of_pat env sigma tm,indnames],mat)
| PFix f -> Detyping.detype_names false [] env (Global.env()) sigma (mkFix f) (** FIXME bad env *)
| PCoFix c -> Detyping.detype_names false [] env (Global.env()) sigma (mkCoFix c)
| PSort s -> GSort (loc,s)
let extern_constr_pattern env sigma pat =
extern true (None,[]) Id.Set.empty (glob_of_pat env sigma pat)
let extern_rel_context where env sigma sign =
let a = detype_rel_context where [] (names_of_rel_context env,env) sigma sign in
let vars = vars_of_env env in
pi3 (extern_local_binder (None,[]) vars a)
|