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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 *)
(************************************************************************)
open Pp
open Errors
open Util
open Names
open Nameops
open Namegen
open Libnames
open Globnames
open Impargs
open Glob_term
open Glob_ops
open Patternops
open Pretyping
open Cases
open Constrexpr
open Constrexpr_ops
open Notation_term
open Notation_ops
open Topconstr
open Nametab
open Notation
open Inductiveops
open Decl_kinds
open Context.Rel.Declaration
(** constr_expr -> glob_constr translation:
- it adds holes for implicit arguments
- it remplaces notations by their value (scopes stuff are here)
- it recognizes global vars from local ones
- it prepares pattern maching problems (a pattern becomes a tree where nodes
are constructor/variable pairs and leafs are variables)
All that at once, fasten your seatbelt!
*)
(* To interpret implicits and arg scopes of variables in inductive
types and recursive definitions and of projection names in records *)
type var_internalization_type =
| Inductive of Id.t list (* list of params *)
| Recursive
| Method
| Variable
type var_internalization_data =
(* type of the "free" variable, for coqdoc, e.g. while typing the
constructor of JMeq, "JMeq" behaves as a variable of type Inductive *)
var_internalization_type *
(* impargs to automatically add to the variable, e.g. for "JMeq A a B b"
in implicit mode, this is [A;B] and this adds (A:=A) and (B:=B) *)
Id.t list *
(* signature of impargs of the variable *)
Impargs.implicit_status list *
(* subscopes of the args of the variable *)
scope_name option list
type internalization_env =
(var_internalization_data) Id.Map.t
type glob_binder = (Name.t * binding_kind * glob_constr option * glob_constr)
type ltac_sign = {
ltac_vars : Id.Set.t;
ltac_bound : Id.Set.t;
}
let interning_grammar = ref false
(* Historically for parsing grammar rules, but in fact used only for
translator, v7 parsing, and unstrict tactic internalization *)
let for_grammar f x =
interning_grammar := true;
let a = f x in
interning_grammar := false;
a
(**********************************************************************)
(* Locating reference, possibly via an abbreviation *)
let locate_reference qid =
Smartlocate.global_of_extended_global (Nametab.locate_extended qid)
let is_global id =
try
let _ = locate_reference (qualid_of_ident id) in true
with Not_found ->
false
let global_reference_of_reference ref =
locate_reference (snd (qualid_of_reference ref))
let global_reference id =
Universes.constr_of_global (locate_reference (qualid_of_ident id))
let construct_reference ctx id =
try
Term.mkVar (let _ = Context.Named.lookup id ctx in id)
with Not_found ->
global_reference id
let global_reference_in_absolute_module dir id =
Universes.constr_of_global (Nametab.global_of_path (Libnames.make_path dir id))
(**********************************************************************)
(* Internalization errors *)
type internalization_error =
| VariableCapture of Id.t * Id.t
| IllegalMetavariable
| NotAConstructor of reference
| UnboundFixName of bool * Id.t
| NonLinearPattern of Id.t
| BadPatternsNumber of int * int
exception InternalizationError of Loc.t * internalization_error
let explain_variable_capture id id' =
pr_id id ++ str " is dependent in the type of " ++ pr_id id' ++
strbrk ": cannot interpret both of them with the same type"
let explain_illegal_metavariable =
str "Metavariables allowed only in patterns"
let explain_not_a_constructor ref =
str "Unknown constructor: " ++ pr_reference ref
let explain_unbound_fix_name is_cofix id =
str "The name" ++ spc () ++ pr_id id ++
spc () ++ str "is not bound in the corresponding" ++ spc () ++
str (if is_cofix then "co" else "") ++ str "fixpoint definition"
let explain_non_linear_pattern id =
str "The variable " ++ pr_id id ++ str " is bound several times in pattern"
let explain_bad_patterns_number n1 n2 =
str "Expecting " ++ int n1 ++ str (String.plural n1 " pattern") ++
str " but found " ++ int n2
let explain_internalization_error e =
let pp = match e with
| VariableCapture (id,id') -> explain_variable_capture id id'
| IllegalMetavariable -> explain_illegal_metavariable
| NotAConstructor ref -> explain_not_a_constructor ref
| UnboundFixName (iscofix,id) -> explain_unbound_fix_name iscofix id
| NonLinearPattern id -> explain_non_linear_pattern id
| BadPatternsNumber (n1,n2) -> explain_bad_patterns_number n1 n2
in pp ++ str "."
let error_bad_inductive_type loc =
user_err_loc (loc,"",str
"This should be an inductive type applied to patterns.")
let error_parameter_not_implicit loc =
user_err_loc (loc,"", str
"The parameters do not bind in patterns;" ++ spc () ++ str
"they must be replaced by '_'.")
let error_ldots_var loc =
user_err_loc (loc,"",str "Special token " ++ pr_id ldots_var ++
str " is for use in the Notation command.")
(**********************************************************************)
(* Pre-computing the implicit arguments and arguments scopes needed *)
(* for interpretation *)
let parsing_explicit = ref false
let empty_internalization_env = Id.Map.empty
let compute_explicitable_implicit imps = function
| Inductive params ->
(* In inductive types, the parameters are fixed implicit arguments *)
let sub_impl,_ = List.chop (List.length params) imps in
let sub_impl' = List.filter is_status_implicit sub_impl in
List.map name_of_implicit sub_impl'
| Recursive | Method | Variable ->
(* Unable to know in advance what the implicit arguments will be *)
[]
let compute_internalization_data env ty typ impl =
let impl = compute_implicits_with_manual env typ (is_implicit_args()) impl in
let expls_impl = compute_explicitable_implicit impl ty in
(ty, expls_impl, impl, compute_arguments_scope typ)
let compute_internalization_env env ty =
List.fold_left3
(fun map id typ impl -> Id.Map.add id (compute_internalization_data env ty typ impl) map)
empty_internalization_env
(**********************************************************************)
(* Contracting "{ _ }" in notations *)
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_notation_string ntn n =
let pos = List.nth (wildcards ntn 0) n in
let hd = if Int.equal pos 0 then "" else String.sub ntn 0 pos in
let tl =
if Int.equal pos (String.length ntn) then ""
else String.sub ntn (pos+1) (String.length ntn - pos -1) in
hd ^ "{ _ }" ^ tl
(* This contracts the special case of "{ _ }" for sumbool, sumor notations *)
(* Remark: expansion of squash at definition is done in metasyntax.ml *)
let contract_notation ntn (l,ll,bll) =
let ntn' = ref ntn in
let rec contract_squash n = function
| [] -> []
| CNotation (_,"{ _ }",([a],[],[])) :: l ->
ntn' := expand_notation_string !ntn' n;
contract_squash n (a::l)
| a :: l ->
a::contract_squash (n+1) l in
let l = contract_squash 0 l in
(* side effect; don't inline *)
!ntn',(l,ll,bll)
let contract_pat_notation ntn (l,ll) =
let ntn' = ref ntn in
let rec contract_squash n = function
| [] -> []
| CPatNotation (_,"{ _ }",([a],[]),[]) :: l ->
ntn' := expand_notation_string !ntn' n;
contract_squash n (a::l)
| a :: l ->
a::contract_squash (n+1) l in
let l = contract_squash 0 l in
(* side effect; don't inline *)
!ntn',(l,ll)
type intern_env = {
ids: Names.Id.Set.t;
unb: bool;
tmp_scope: Notation_term.tmp_scope_name option;
scopes: Notation_term.scope_name list;
impls: internalization_env }
(**********************************************************************)
(* Remembering the parsing scope of variables in notations *)
let make_current_scope tmp scopes = match tmp, scopes with
| Some tmp_scope, (sc :: _) when String.equal sc tmp_scope -> scopes
| Some tmp_scope, scopes -> tmp_scope :: scopes
| None, scopes -> scopes
let pr_scope_stack = function
| [] -> str "the empty scope stack"
| [a] -> str "scope " ++ str a
| l -> str "scope stack " ++
str "[" ++ prlist_with_sep pr_comma str l ++ str "]"
let error_inconsistent_scope loc id scopes1 scopes2 =
user_err_loc (loc,"set_var_scope",
pr_id id ++ str " is here used in " ++
pr_scope_stack scopes2 ++ strbrk " while it was elsewhere used in " ++
pr_scope_stack scopes1)
let error_expect_binder_notation_type loc id =
user_err_loc (loc,"",
pr_id id ++
str " is expected to occur in binding position in the right-hand side.")
let set_var_scope loc id istermvar env ntnvars =
try
let isonlybinding,idscopes,typ = Id.Map.find id ntnvars in
if istermvar then isonlybinding := false;
let () = if istermvar then
(* scopes have no effect on the interpretation of identifiers *)
begin match !idscopes with
| None -> idscopes := Some (env.tmp_scope, env.scopes)
| Some (tmp, scope) ->
let s1 = make_current_scope tmp scope in
let s2 = make_current_scope env.tmp_scope env.scopes in
if not (List.equal String.equal s1 s2) then error_inconsistent_scope loc id s1 s2
end
in
match typ with
| NtnInternTypeBinder ->
if istermvar then error_expect_binder_notation_type loc id
| NtnInternTypeConstr ->
(* We need sometimes to parse idents at a constr level for
factorization and we cannot enforce this constraint:
if not istermvar then error_expect_constr_notation_type loc id *)
()
| NtnInternTypeIdent -> ()
with Not_found ->
(* Not in a notation *)
()
let set_type_scope env = {env with tmp_scope = Notation.current_type_scope_name ()}
let reset_tmp_scope env = {env with tmp_scope = None}
let rec it_mkGProd loc2 env body =
match env with
(loc1, (na, bk, _, t)) :: tl -> it_mkGProd loc2 tl (GProd (Loc.merge loc1 loc2, na, bk, t, body))
| [] -> body
let rec it_mkGLambda loc2 env body =
match env with
(loc1, (na, bk, _, t)) :: tl -> it_mkGLambda loc2 tl (GLambda (Loc.merge loc1 loc2, na, bk, t, body))
| [] -> body
(**********************************************************************)
(* Utilities for binders *)
let build_impls = function
|Implicit -> (function
|Name id -> Some (id, Impargs.Manual, (true,true))
|Anonymous -> Some (Id.of_string "_", Impargs.Manual, (true,true)))
|Explicit -> fun _ -> None
let impls_type_list ?(args = []) =
let rec aux acc = function
|GProd (_,na,bk,_,c) -> aux ((build_impls bk na)::acc) c
|_ -> (Variable,[],List.append args (List.rev acc),[])
in aux []
let impls_term_list ?(args = []) =
let rec aux acc = function
|GLambda (_,na,bk,_,c) -> aux ((build_impls bk na)::acc) c
|GRec (_, fix_kind, nas, args, tys, bds) ->
let nb = match fix_kind with |GFix (_, n) -> n | GCoFix n -> n in
let acc' = List.fold_left (fun a (na, bk, _, _) -> (build_impls bk na)::a) acc args.(nb) in
aux acc' bds.(nb)
|_ -> (Variable,[],List.append args (List.rev acc),[])
in aux []
(* Check if in binder "(x1 x2 .. xn : t)", none of x1 .. xn-1 occurs in t *)
let rec check_capture ty = function
| (loc,Name id)::(_,Name id')::_ when occur_glob_constr id ty ->
raise (InternalizationError (loc,VariableCapture (id,id')))
| _::nal ->
check_capture ty nal
| [] ->
()
let locate_if_hole loc na = function
| GHole (_,_,naming,arg) ->
(try match na with
| Name id -> glob_constr_of_notation_constr loc
(Reserve.find_reserved_type id)
| Anonymous -> raise Not_found
with Not_found -> GHole (loc, Evar_kinds.BinderType na, naming, arg))
| x -> x
let reset_hidden_inductive_implicit_test env =
{ env with impls = Id.Map.map (function
| (Inductive _,b,c,d) -> (Inductive [],b,c,d)
| x -> x) env.impls }
let check_hidden_implicit_parameters id impls =
if Id.Map.exists (fun _ -> function
| (Inductive indparams,_,_,_) -> Id.List.mem id indparams
| _ -> false) impls
then
errorlabstrm "" (strbrk "A parameter of an inductive type " ++
pr_id id ++ strbrk " is not allowed to be used as a bound variable in the type of its constructor.")
let push_name_env ?(global_level=false) lvar implargs env =
function
| loc,Anonymous ->
if global_level then
user_err_loc (loc,"", str "Anonymous variables not allowed");
env
| loc,Name id ->
check_hidden_implicit_parameters id env.impls ;
let (_,ntnvars) = lvar in
if Id.Map.is_empty ntnvars && Id.equal id ldots_var
then error_ldots_var loc;
set_var_scope loc id false env ntnvars;
if global_level then Dumpglob.dump_definition (loc,id) true "var"
else Dumpglob.dump_binding loc id;
{env with ids = Id.Set.add id env.ids; impls = Id.Map.add id implargs env.impls}
let intern_generalized_binder ?(global_level=false) intern_type lvar
env (loc, na) b b' t ty =
let ids = (match na with Anonymous -> fun x -> x | Name na -> Id.Set.add na) env.ids in
let ty, ids' =
if t then ty, ids else
Implicit_quantifiers.implicit_application ids
Implicit_quantifiers.combine_params_freevar ty
in
let ty' = intern_type {env with ids = ids; unb = true} ty in
let fvs = Implicit_quantifiers.generalizable_vars_of_glob_constr ~bound:ids ~allowed:ids' ty' in
let env' = List.fold_left
(fun env (x, l) -> push_name_env ~global_level lvar (Variable,[],[],[])(*?*) env (l, Name x))
env fvs in
let bl = List.map
(fun (id, loc) ->
(loc, (Name id, b, None, GHole (loc, Evar_kinds.BinderType (Name id), Misctypes.IntroAnonymous, None))))
fvs
in
let na = match na with
| Anonymous ->
if global_level then na
else
let name =
let id =
match ty with
| CApp (_, (_, CRef (Ident (loc,id),_)), _) -> id
| _ -> default_non_dependent_ident
in Implicit_quantifiers.make_fresh ids' (Global.env ()) id
in Name name
| _ -> na
in (push_name_env ~global_level lvar (impls_type_list ty')(*?*) env' (loc,na)), (loc,(na,b',None,ty')) :: List.rev bl
let intern_assumption intern lvar env nal bk ty =
let intern_type env = intern (set_type_scope env) in
match bk with
| Default k ->
let ty = intern_type env ty in
check_capture ty nal;
let impls = impls_type_list ty in
List.fold_left
(fun (env, bl) (loc, na as locna) ->
(push_name_env lvar impls env locna,
(loc,(na,k,None,locate_if_hole loc na ty))::bl))
(env, []) nal
| Generalized (b,b',t) ->
let env, b = intern_generalized_binder intern_type lvar env (List.hd nal) b b' t ty in
env, b
let intern_local_binder_aux ?(global_level=false) intern lvar (env,bl) = function
| LocalRawAssum(nal,bk,ty) ->
let env, bl' = intern_assumption intern lvar env nal bk ty in
env, bl' @ bl
| LocalRawDef((loc,na as locna),def) ->
let indef = intern env def in
(push_name_env lvar (impls_term_list indef) env locna,
(loc,(na,Explicit,Some(indef),GHole(loc,Evar_kinds.BinderType na,Misctypes.IntroAnonymous,None)))::bl)
let intern_generalization intern env lvar loc bk ak c =
let c = intern {env with unb = true} c in
let fvs = Implicit_quantifiers.generalizable_vars_of_glob_constr ~bound:env.ids c in
let env', c' =
let abs =
let pi = match ak with
| Some AbsPi -> true
| Some _ -> false
| None ->
match Notation.current_type_scope_name () with
| Some type_scope ->
let is_type_scope = match env.tmp_scope with
| None -> false
| Some sc -> String.equal sc type_scope
in
is_type_scope ||
String.List.mem type_scope env.scopes
| None -> false
in
if pi then
(fun (id, loc') acc ->
GProd (Loc.merge loc' loc, Name id, bk, GHole (loc', Evar_kinds.BinderType (Name id), Misctypes.IntroAnonymous, None), acc))
else
(fun (id, loc') acc ->
GLambda (Loc.merge loc' loc, Name id, bk, GHole (loc', Evar_kinds.BinderType (Name id), Misctypes.IntroAnonymous, None), acc))
in
List.fold_right (fun (id, loc as lid) (env, acc) ->
let env' = push_name_env lvar (Variable,[],[],[]) env (loc, Name id) in
(env', abs lid acc)) fvs (env,c)
in c'
(**********************************************************************)
(* Syntax extensions *)
let option_mem_assoc id = function
| Some (id',c) -> Id.equal id id'
| None -> false
let find_fresh_name renaming (terms,termlists,binders) avoid id =
let fold1 _ (c, _) accu = Id.Set.union (free_vars_of_constr_expr c) accu in
let fold2 _ (l, _) accu =
let fold accu c = Id.Set.union (free_vars_of_constr_expr c) accu in
List.fold_left fold accu l
in
let fold3 _ x accu = Id.Set.add x accu in
let fvs1 = Id.Map.fold fold1 terms avoid in
let fvs2 = Id.Map.fold fold2 termlists fvs1 in
let fvs3 = Id.Map.fold fold3 renaming fvs2 in
(* TODO binders *)
next_ident_away_from id (fun id -> Id.Set.mem id fvs3)
let traverse_binder (terms,_,_ as subst) avoid (renaming,env) = function
| Anonymous -> (renaming,env),Anonymous
| Name id ->
try
(* Binders bound in the notation are considered first-order objects *)
let _,na = coerce_to_name (fst (Id.Map.find id terms)) in
(renaming,{env with ids = name_fold Id.Set.add na env.ids}), na
with Not_found ->
(* Binders not bound in the notation do not capture variables *)
(* outside the notation (i.e. in the substitution) *)
let id' = find_fresh_name renaming subst avoid id in
let renaming' =
if Id.equal id id' then renaming else Id.Map.add id id' renaming
in
(renaming',env), Name id'
let make_letins = List.fold_right (fun (loc,(na,b,t)) c -> GLetIn (loc,na,b,c))
let rec subordinate_letins letins = function
(* binders come in reverse order; the non-let are returned in reverse order together *)
(* with the subordinated let-in in writing order *)
| (loc,(na,_,Some b,t))::l ->
subordinate_letins ((loc,(na,b,t))::letins) l
| (loc,(na,bk,None,t))::l ->
let letins',rest = subordinate_letins [] l in
letins',((loc,(na,bk,t)),letins)::rest
| [] ->
letins,[]
let rec subst_iterator y t = function
| GVar (_,id) as x -> if Id.equal id y then t else x
| x -> map_glob_constr (subst_iterator y t) x
let instantiate_notation_constr loc intern (_,ntnvars as lvar) subst infos c =
let (terms,termlists,binders) = subst in
(* when called while defining a notation, avoid capturing the private binders
of the expression by variables bound by the notation (see #3892) *)
let avoid = Id.Map.domain ntnvars in
let rec aux (terms,binderopt as subst') (renaming,env) c =
let subinfos = renaming,{env with tmp_scope = None} in
match c with
| NVar id -> subst_var subst' (renaming, env) id
| NList (x,_,iter,terminator,lassoc) ->
(try
(* All elements of the list are in scopes (scopt,subscopes) *)
let (l,(scopt,subscopes)) = Id.Map.find x termlists in
let termin = aux subst' subinfos terminator in
let fold a t =
let nterms = Id.Map.add x (a, (scopt, subscopes)) terms in
subst_iterator ldots_var t (aux (nterms, binderopt) subinfos iter)
in
List.fold_right fold (if lassoc then List.rev l else l) termin
with Not_found ->
anomaly (Pp.str "Inconsistent substitution of recursive notation"))
| NHole (knd, naming, arg) ->
let knd = match knd with
| Evar_kinds.BinderType (Name id as na) ->
let na =
try snd (coerce_to_name (fst (Id.Map.find id terms)))
with Not_found ->
try Name (Id.Map.find id renaming)
with Not_found -> na
in
Evar_kinds.BinderType na
| _ -> knd
in
let arg = match arg with
| None -> None
| Some arg ->
let open Tacexpr in
let open Genarg in
let wit = glbwit Constrarg.wit_tactic in
let body =
if has_type arg wit then out_gen wit arg
else assert false (** FIXME *)
in
let mk_env id (c, (tmp_scope, subscopes)) accu =
let nenv = {env with tmp_scope; scopes = subscopes @ env.scopes} in
let gc = intern nenv c in
let c = ConstrMayEval (Genredexpr.ConstrTerm (gc, Some c)) in
((loc, id), c) :: accu
in
let bindings = Id.Map.fold mk_env terms [] in
let tac = TacLetIn (false, bindings, body) in
let arg = in_gen wit tac in
Some arg
in
GHole (loc, knd, naming, arg)
| NBinderList (x,_,iter,terminator) ->
(try
(* All elements of the list are in scopes (scopt,subscopes) *)
let (bl,(scopt,subscopes)) = Id.Map.find x binders in
let env,bl = List.fold_left (intern_local_binder_aux intern lvar) (env,[]) bl in
let letins,bl = subordinate_letins [] bl in
let termin = aux subst' (renaming,env) terminator in
let res = List.fold_left (fun t binder ->
subst_iterator ldots_var t
(aux (terms,Some(x,binder)) subinfos iter))
termin bl in
make_letins letins res
with Not_found ->
anomaly (Pp.str "Inconsistent substitution of recursive notation"))
| NProd (Name id, NHole _, c') when option_mem_assoc id binderopt ->
let (loc,(na,bk,t)),letins = snd (Option.get binderopt) in
GProd (loc,na,bk,t,make_letins letins (aux subst' infos c'))
| NLambda (Name id,NHole _,c') when option_mem_assoc id binderopt ->
let (loc,(na,bk,t)),letins = snd (Option.get binderopt) in
GLambda (loc,na,bk,t,make_letins letins (aux subst' infos c'))
(* Two special cases to keep binder name synchronous with BinderType *)
| NProd (na,NHole(Evar_kinds.BinderType na',naming,arg),c')
when Name.equal na na' ->
let subinfos,na = traverse_binder subst avoid subinfos na in
let ty = GHole (loc,Evar_kinds.BinderType na,naming,arg) in
GProd (loc,na,Explicit,ty,aux subst' subinfos c')
| NLambda (na,NHole(Evar_kinds.BinderType na',naming,arg),c')
when Name.equal na na' ->
let subinfos,na = traverse_binder subst avoid subinfos na in
let ty = GHole (loc,Evar_kinds.BinderType na,naming,arg) in
GLambda (loc,na,Explicit,ty,aux subst' subinfos c')
| t ->
glob_constr_of_notation_constr_with_binders loc
(traverse_binder subst avoid) (aux subst') subinfos t
and subst_var (terms, binderopt) (renaming, env) id =
(* subst remembers the delimiters stack in the interpretation *)
(* of the notations *)
try
let (a,(scopt,subscopes)) = Id.Map.find id terms in
intern {env with tmp_scope = scopt;
scopes = subscopes @ env.scopes} a
with Not_found ->
try
GVar (loc, Id.Map.find id renaming)
with Not_found ->
(* Happens for local notation joint with inductive/fixpoint defs *)
GVar (loc,id)
in aux (terms,None) infos c
let split_by_type ids =
List.fold_right (fun (x,(scl,typ)) (l1,l2,l3) ->
match typ with
| NtnTypeConstr | NtnTypeOnlyBinder -> ((x,scl)::l1,l2,l3)
| NtnTypeConstrList -> (l1,(x,scl)::l2,l3)
| NtnTypeBinderList -> (l1,l2,(x,scl)::l3)) ids ([],[],[])
let make_subst ids l =
let fold accu (id, scl) a = Id.Map.add id (a, scl) accu in
List.fold_left2 fold Id.Map.empty ids l
let intern_notation intern env lvar loc ntn fullargs =
let ntn,(args,argslist,bll as fullargs) = contract_notation ntn fullargs in
let ((ids,c),df) = interp_notation loc ntn (env.tmp_scope,env.scopes) in
Dumpglob.dump_notation_location (ntn_loc loc fullargs ntn) ntn df;
let ids,idsl,idsbl = split_by_type ids in
let terms = make_subst ids args in
let termlists = make_subst idsl argslist in
let binders = make_subst idsbl bll in
instantiate_notation_constr loc intern lvar
(terms, termlists, binders) (Id.Map.empty, env) c
(**********************************************************************)
(* Discriminating between bound variables and global references *)
let string_of_ty = function
| Inductive _ -> "ind"
| Recursive -> "def"
| Method -> "meth"
| Variable -> "var"
let intern_var genv (ltacvars,ntnvars) namedctx loc id =
(* Is [id] an inductive type potentially with implicit *)
try
let ty,expl_impls,impls,argsc = Id.Map.find id genv.impls in
let expl_impls = List.map
(fun id -> CRef (Ident (loc,id),None), Some (loc,ExplByName id)) expl_impls in
let tys = string_of_ty ty in
Dumpglob.dump_reference loc "<>" (Id.to_string id) tys;
GVar (loc,id), make_implicits_list impls, argsc, expl_impls
with Not_found ->
(* Is [id] bound in current term or is an ltac var bound to constr *)
if Id.Set.mem id genv.ids || Id.Set.mem id ltacvars.ltac_vars
then
GVar (loc,id), [], [], []
(* Is [id] a notation variable *)
else if Id.Map.mem id ntnvars
then
(set_var_scope loc id true genv ntnvars; GVar (loc,id), [], [], [])
(* Is [id] the special variable for recursive notations *)
else if Id.equal id ldots_var
then if Id.Map.is_empty ntnvars
then error_ldots_var loc
else GVar (loc,id), [], [], []
else if Id.Set.mem id ltacvars.ltac_bound then
(* Is [id] bound to a free name in ltac (this is an ltac error message) *)
user_err_loc (loc,"intern_var",
str "variable " ++ pr_id id ++ str " should be bound to a term.")
else
(* Is [id] a goal or section variable *)
let _ = Context.Named.lookup id namedctx in
try
(* [id] a section variable *)
(* Redundant: could be done in intern_qualid *)
let ref = VarRef id in
let impls = implicits_of_global ref in
let scopes = find_arguments_scope ref in
Dumpglob.dump_reference loc "<>" (string_of_qualid (Decls.variable_secpath id)) "var";
GRef (loc, ref, None), impls, scopes, []
with e when Errors.noncritical e ->
(* [id] a goal variable *)
GVar (loc,id), [], [], []
let find_appl_head_data c =
match c with
| GRef (loc,ref,_) as x ->
let impls = implicits_of_global ref in
let scopes = find_arguments_scope ref in
x, impls, scopes, []
| GApp (_,GRef (_,ref,_),l) as x
when l != [] && Flags.version_strictly_greater Flags.V8_2 ->
let n = List.length l in
let impls = implicits_of_global ref in
let scopes = find_arguments_scope ref in
x, List.map (drop_first_implicits n) impls,
List.skipn_at_least n scopes,[]
| x -> x,[],[],[]
let error_not_enough_arguments loc =
user_err_loc (loc,"",str "Abbreviation is not applied enough.")
let check_no_explicitation l =
let is_unset (a, b) = match b with None -> false | Some _ -> true in
let l = List.filter is_unset l in
match l with
| [] -> ()
| (_, None) :: _ -> assert false
| (_, Some (loc, _)) :: _ ->
user_err_loc (loc,"",str"Unexpected explicitation of the argument of an abbreviation.")
let dump_extended_global loc = function
| TrueGlobal ref -> (*feedback_global loc ref;*) Dumpglob.add_glob loc ref
| SynDef sp -> Dumpglob.add_glob_kn loc sp
let intern_extended_global_of_qualid (loc,qid) =
let r = Nametab.locate_extended qid in dump_extended_global loc r; r
let intern_reference ref =
let qid = qualid_of_reference ref in
let r =
try intern_extended_global_of_qualid qid
with Not_found -> error_global_not_found_loc (fst qid) (snd qid)
in
Smartlocate.global_of_extended_global r
(* Is it a global reference or a syntactic definition? *)
let intern_qualid loc qid intern env lvar us args =
match intern_extended_global_of_qualid (loc,qid) with
| TrueGlobal ref -> GRef (loc, ref, us), true, args
| SynDef sp ->
let (ids,c) = Syntax_def.search_syntactic_definition sp in
let nids = List.length ids in
if List.length args < nids then error_not_enough_arguments loc;
let args1,args2 = List.chop nids args in
check_no_explicitation args1;
let terms = make_subst ids (List.map fst args1) in
let subst = (terms, Id.Map.empty, Id.Map.empty) in
let infos = (Id.Map.empty, env) in
let projapp = match c with NRef _ -> true | _ -> false in
let c = instantiate_notation_constr loc intern lvar subst infos c in
let c = match us, c with
| None, _ -> c
| Some _, GRef (loc, ref, None) -> GRef (loc, ref, us)
| Some _, _ ->
user_err_loc (loc, "", str "Notation " ++ pr_qualid qid ++
str " cannot have a universe instance")
in
c, projapp, args2
(* Rule out section vars since these should have been found by intern_var *)
let intern_non_secvar_qualid loc qid intern env lvar us args =
match intern_qualid loc qid intern env lvar us args with
| GRef (_, VarRef _, _),_,_ -> raise Not_found
| r -> r
let intern_applied_reference intern env namedctx lvar us args = function
| Qualid (loc, qid) ->
let r,projapp,args2 =
try intern_qualid loc qid intern env lvar us args
with Not_found -> error_global_not_found_loc loc qid
in
let x, imp, scopes, l = find_appl_head_data r in
(x,imp,scopes,l), args2
| Ident (loc, id) ->
try intern_var env lvar namedctx loc id, args
with Not_found ->
let qid = qualid_of_ident id in
try
let r, projapp, args2 = intern_non_secvar_qualid loc qid intern env lvar us args in
let x, imp, scopes, l = find_appl_head_data r in
(x,imp,scopes,l), args2
with Not_found ->
(* Extra allowance for non globalizing functions *)
if !interning_grammar || env.unb then
(GVar (loc,id), [], [], []), args
else error_global_not_found_loc loc qid
let interp_reference vars r =
let (r,_,_,_),_ =
intern_applied_reference (fun _ -> error_not_enough_arguments Loc.ghost)
{ids = Id.Set.empty; unb = false ;
tmp_scope = None; scopes = []; impls = empty_internalization_env} []
(vars, Id.Map.empty) None [] r
in r
(**********************************************************************)
(** {5 Cases } *)
(** {6 Elemtary bricks } *)
let apply_scope_env env = function
| [] -> {env with tmp_scope = None}, []
| sc::scl -> {env with tmp_scope = sc}, scl
let rec simple_adjust_scopes n scopes =
(* Note: they can be less scopes than arguments but also more scopes *)
(* than arguments because extra scopes are used in the presence of *)
(* coercions to funclass *)
if Int.equal n 0 then [] else match scopes with
| [] -> None :: simple_adjust_scopes (n-1) []
| sc::scopes -> sc :: simple_adjust_scopes (n-1) scopes
let find_remaining_scopes pl1 pl2 ref =
let impls_st = implicits_of_global ref in
let len_pl1 = List.length pl1 in
let len_pl2 = List.length pl2 in
let impl_list = if Int.equal len_pl1 0
then select_impargs_size len_pl2 impls_st
else List.skipn_at_least len_pl1 (select_stronger_impargs impls_st) in
let allscs = find_arguments_scope ref in
let scope_list = List.skipn_at_least len_pl1 allscs in
let rec aux = function
|[],l -> l
|_,[] -> []
|h::t,_::tt when is_status_implicit h -> aux (t,tt)
|_::t,h::tt -> h :: aux (t,tt)
in ((try List.firstn len_pl1 allscs with Failure _ -> simple_adjust_scopes len_pl1 allscs),
simple_adjust_scopes len_pl2 (aux (impl_list,scope_list)))
let merge_subst s1 s2 = Id.Map.fold Id.Map.add s1 s2
let product_of_cases_patterns ids idspl =
List.fold_right (fun (ids,pl) (ids',ptaill) ->
(ids @ ids',
(* Cartesian prod of the or-pats for the nth arg and the tail args *)
List.flatten (
List.map (fun (subst,p) ->
List.map (fun (subst',ptail) -> (merge_subst subst subst',p::ptail)) ptaill) pl)))
idspl (ids,[Id.Map.empty,[]])
(* @return the first variable that occurs twice in a pattern
naive n^2 algo *)
let rec has_duplicate = function
| [] -> None
| x::l -> if Id.List.mem x l then (Some x) else has_duplicate l
let loc_of_lhs lhs =
Loc.merge (fst (List.hd lhs)) (fst (List.last lhs))
let check_linearity lhs ids =
match has_duplicate ids with
| Some id ->
raise (InternalizationError (loc_of_lhs lhs,NonLinearPattern id))
| None ->
()
(* Match the number of pattern against the number of matched args *)
let check_number_of_pattern loc n l =
let p = List.length l in
if not (Int.equal n p) then raise (InternalizationError (loc,BadPatternsNumber (n,p)))
let check_or_pat_variables loc ids idsl =
if List.exists (fun ids' -> not (List.eq_set Id.equal ids ids')) idsl then
user_err_loc (loc, "", str
"The components of this disjunctive pattern must bind the same variables.")
(** Use only when params were NOT asked to the user.
@return if letin are included *)
let check_constructor_length env loc cstr len_pl pl0 =
let n = len_pl + List.length pl0 in
if Int.equal n (Inductiveops.constructor_nallargs cstr) then false else
(Int.equal n (Inductiveops.constructor_nalldecls cstr) ||
(error_wrong_numarg_constructor_loc loc env cstr
(Inductiveops.constructor_nrealargs cstr)))
let add_implicits_check_length fail nargs nargs_with_letin impls_st len_pl1 pl2 =
let impl_list = if Int.equal len_pl1 0
then select_impargs_size (List.length pl2) impls_st
else List.skipn_at_least len_pl1 (select_stronger_impargs impls_st) in
let remaining_args = List.fold_left (fun i x -> if is_status_implicit x then i else succ i) in
let rec aux i = function
|[],l -> let args_len = List.length l + List.length impl_list + len_pl1 in
((if Int.equal args_len nargs then false
else Int.equal args_len nargs_with_letin || (fst (fail (nargs - List.length impl_list + i))))
,l)
|imp::q as il,[] -> if is_status_implicit imp && maximal_insertion_of imp
then let (b,out) = aux i (q,[]) in (b,RCPatAtom(Loc.ghost,None)::out)
else fail (remaining_args (len_pl1+i) il)
|imp::q,(hh::tt as l) -> if is_status_implicit imp
then let (b,out) = aux i (q,l) in (b,RCPatAtom(Loc.ghost,None)::out)
else let (b,out) = aux (succ i) (q,tt) in (b,hh::out)
in aux 0 (impl_list,pl2)
let add_implicits_check_constructor_length env loc c len_pl1 pl2 =
let nargs = Inductiveops.constructor_nallargs c in
let nargs' = Inductiveops.constructor_nalldecls c in
let impls_st = implicits_of_global (ConstructRef c) in
add_implicits_check_length (error_wrong_numarg_constructor_loc loc env c)
nargs nargs' impls_st len_pl1 pl2
let add_implicits_check_ind_length env loc c len_pl1 pl2 =
let nallargs = inductive_nallargs_env env c in
let nalldecls = inductive_nalldecls_env env c in
let impls_st = implicits_of_global (IndRef c) in
add_implicits_check_length (error_wrong_numarg_inductive_loc loc env c)
nallargs nalldecls impls_st len_pl1 pl2
(** Do not raise NotEnoughArguments thanks to preconditions*)
let chop_params_pattern loc ind args with_letin =
let nparams = if with_letin
then Inductiveops.inductive_nparamdecls ind
else Inductiveops.inductive_nparams ind in
assert (nparams <= List.length args);
let params,args = List.chop nparams args in
List.iter (function PatVar(_,Anonymous) -> ()
| PatVar (loc',_) | PatCstr(loc',_,_,_) -> error_parameter_not_implicit loc') params;
args
let find_constructor loc add_params ref =
let (ind,_ as cstr) = match ref with
| ConstructRef cstr -> cstr
| IndRef _ ->
let error = str "There is an inductive name deep in a \"in\" clause." in
user_err_loc (loc, "find_constructor", error)
| ConstRef _ | VarRef _ ->
let error = str "This reference is not a constructor." in
user_err_loc (loc, "find_constructor", error)
in
cstr, match add_params with
| Some nb_args ->
let nb =
if Int.equal nb_args (Inductiveops.constructor_nrealdecls cstr)
then Inductiveops.inductive_nparamdecls ind
else Inductiveops.inductive_nparams ind
in
List.make nb ([], [(Id.Map.empty, PatVar(Loc.ghost,Anonymous))])
| None -> []
let find_pattern_variable = function
| Ident (loc,id) -> id
| Qualid (loc,_) as x -> raise (InternalizationError(loc,NotAConstructor x))
let sort_fields mode loc l completer =
(*mode=false if pattern and true if constructor*)
match l with
| [] -> None
| (refer, value)::rem ->
let (nparams, (* the number of parameters *)
base_constructor, (* the reference constructor of the record *)
(max, (* number of params *)
(first_index, (* index of the first field of the record *)
list_proj))) (* list of projections *)
=
let record =
try Recordops.find_projection
(global_reference_of_reference refer)
with Not_found ->
user_err_loc (loc_of_reference refer, "intern", pr_reference refer ++ str": Not a projection")
in
(* elimination of the first field from the projections *)
let rec build_patt l m i acc =
match l with
| [] -> (i, acc)
| (Some name) :: b->
(match m with
| [] -> anomaly (Pp.str "Number of projections mismatch")
| (_, regular)::tm ->
let boolean = not regular in
begin match global_reference_of_reference refer with
| ConstRef name' when eq_constant name name' ->
if boolean && mode then
user_err_loc (loc, "", str"No local fields allowed in a record construction.")
else build_patt b tm (i + 1) (i, snd acc) (* we found it *)
| _ ->
build_patt b tm (if boolean&&mode then i else i + 1)
(if boolean && mode then acc
else fst acc, (i, ConstRef name) :: snd acc)
end)
| None :: b-> (* we don't want anonymous fields *)
if mode then
user_err_loc (loc, "", str "This record contains anonymous fields.")
else build_patt b m (i+1) acc
(* anonymous arguments don't appear in m *)
in
let ind = record.Recordops.s_CONST in
try (* insertion of Constextern.reference_global *)
(record.Recordops.s_EXPECTEDPARAM,
Qualid (loc, shortest_qualid_of_global Id.Set.empty (ConstructRef ind)),
build_patt record.Recordops.s_PROJ record.Recordops.s_PROJKIND 1 (0,[]))
with Not_found -> anomaly (Pp.str "Environment corruption for records.")
in
(* now we want to have all fields of the pattern indexed by their place in
the constructor *)
let rec sf patts accpatt =
match patts with
| [] -> accpatt
| p::q->
let refer, patt = p in
let glob_refer = try global_reference_of_reference refer
with |Not_found ->
user_err_loc (loc_of_reference refer, "intern",
str "The field \"" ++ pr_reference refer ++ str "\" does not exist.") in
let rec add_patt l acc =
match l with
| [] ->
user_err_loc
(loc, "",
str "This record contains fields of different records.")
| (i, a) :: b->
if eq_gr glob_refer a
then (i,List.rev_append acc l)
else add_patt b ((i,a)::acc)
in
let (index, projs) = add_patt (snd accpatt) [] in
sf q ((index, patt)::fst accpatt, projs) in
let (unsorted_indexed_pattern, remainings) =
sf rem ([first_index, value], list_proj) in
(* we sort them *)
let sorted_indexed_pattern =
List.sort (fun (i, _) (j, _) -> compare i j) unsorted_indexed_pattern in
(* a function to complete with wildcards *)
let rec complete_list n l =
if n <= 1 then l else complete_list (n-1) (completer n l) in
(* a function to remove indice *)
let rec clean_list l i acc =
match l with
| [] -> complete_list (max - i) acc
| (k, p)::q-> clean_list q k (p::(complete_list (k - i) acc))
in
Some (nparams, base_constructor,
List.rev (clean_list sorted_indexed_pattern 0 []))
(** {6 Manage multiple aliases} *)
type alias = {
alias_ids : Id.t list;
alias_map : Id.t Id.Map.t;
}
let empty_alias = {
alias_ids = [];
alias_map = Id.Map.empty;
}
(* [merge_aliases] returns the sets of all aliases encountered at this
point and a substitution mapping extra aliases to the first one *)
let merge_aliases aliases id =
let alias_ids = aliases.alias_ids @ [id] in
let alias_map = match aliases.alias_ids with
| [] -> aliases.alias_map
| id' :: _ -> Id.Map.add id id' aliases.alias_map
in
{ alias_ids; alias_map; }
let alias_of als = match als.alias_ids with
| [] -> Anonymous
| id :: _ -> Name id
let message_redundant_alias id1 id2 =
Feedback.msg_warning
(str "Alias variable " ++ pr_id id1 ++ str " is merged with " ++ pr_id id2)
(** {6 Expanding notations }
@returns a raw_case_pattern_expr :
- no notations and syntactic definition
- global reference and identifeir instead of reference
*)
let rec subst_pat_iterator y t p = match p with
| RCPatAtom (_,id) ->
begin match id with Some x when Id.equal x y -> t | _ -> p end
| RCPatCstr (loc,id,l1,l2) ->
RCPatCstr (loc,id,List.map (subst_pat_iterator y t) l1,
List.map (subst_pat_iterator y t) l2)
| RCPatAlias (l,p,a) -> RCPatAlias (l,subst_pat_iterator y t p,a)
| RCPatOr (l,pl) -> RCPatOr (l,List.map (subst_pat_iterator y t) pl)
let drop_notations_pattern looked_for =
(* At toplevel, Constructors and Inductives are accepted, in recursive calls
only constructor are allowed *)
let ensure_kind top loc g =
try
if top then looked_for g else
match g with ConstructRef _ -> () | _ -> raise Not_found
with Not_found ->
error_invalid_pattern_notation loc
in
let test_kind top =
if top then looked_for else function ConstructRef _ -> () | _ -> raise Not_found
in
let rec drop_syndef top scopes re pats =
let (loc,qid) = qualid_of_reference re in
try
match locate_extended qid with
| SynDef sp ->
let (vars,a) = Syntax_def.search_syntactic_definition sp in
(match a with
| NRef g ->
(* Convention: do not deactivate implicit arguments and scopes for further arguments *)
test_kind top g;
let () = assert (List.is_empty vars) in
let (_,argscs) = find_remaining_scopes [] pats g in
Some (g, [], List.map2 (in_pat_sc scopes) argscs pats)
| NApp (NRef g,[]) -> (* special case: Syndef for @Cstr, this deactivates *)
test_kind top g;
let () = assert (List.is_empty vars) in
Some (g, List.map (in_pat false scopes) pats, [])
| NApp (NRef g,args) ->
(* Convention: do not deactivate implicit arguments and scopes for further arguments *)
test_kind top g;
let nvars = List.length vars in
if List.length pats < nvars then error_not_enough_arguments loc;
let pats1,pats2 = List.chop nvars pats in
let subst = make_subst vars pats1 in
let idspl1 = List.map (in_not false loc scopes (subst, Id.Map.empty) []) args in
let (_,argscs) = find_remaining_scopes pats1 pats2 g in
Some (g, idspl1, List.map2 (in_pat_sc scopes) argscs pats2)
| _ -> raise Not_found)
| TrueGlobal g ->
test_kind top g;
Dumpglob.add_glob loc g;
let (_,argscs) = find_remaining_scopes [] pats g in
Some (g,[],List.map2 (fun x -> in_pat false (x,snd scopes)) argscs pats)
with Not_found -> None
and in_pat top scopes = function
| CPatAlias (loc, p, id) -> RCPatAlias (loc, in_pat top scopes p, id)
| CPatRecord (loc, l) ->
let sorted_fields =
sort_fields false loc l (fun _ l -> (CPatAtom (loc, None))::l) in
begin match sorted_fields with
| None -> RCPatAtom (loc, None)
| Some (n, head, pl) ->
let pl =
if !asymmetric_patterns then pl else
let pars = List.make n (CPatAtom (loc, None)) in
List.rev_append pars pl in
match drop_syndef top scopes head pl with
|Some (a,b,c) -> RCPatCstr(loc, a, b, c)
|None -> raise (InternalizationError (loc,NotAConstructor head))
end
| CPatCstr (loc, head, None, pl) ->
begin
match drop_syndef top scopes head pl with
| Some (a,b,c) -> RCPatCstr(loc, a, b, c)
| None -> raise (InternalizationError (loc,NotAConstructor head))
end
| CPatCstr (loc, r, Some expl_pl, pl) ->
let g = try locate (snd (qualid_of_reference r))
with Not_found ->
raise (InternalizationError (loc,NotAConstructor r)) in
if expl_pl == [] then
(* Convention: (@r) deactivates all further implicit arguments and scopes *)
RCPatCstr (loc, g, List.map (in_pat false scopes) pl, [])
else
(* Convention: (@r expl_pl) deactivates implicit arguments in expl_pl and in pl *)
(* but not scopes in expl_pl *)
let (argscs1,_) = find_remaining_scopes expl_pl pl g in
RCPatCstr (loc, g, List.map2 (in_pat_sc scopes) argscs1 expl_pl @ List.map (in_pat false scopes) pl, [])
| CPatNotation (loc,"- _",([CPatPrim(_,Numeral p)],[]),[])
when Bigint.is_strictly_pos p ->
fst (Notation.interp_prim_token_cases_pattern_expr loc (ensure_kind false loc) (Numeral (Bigint.neg p)) scopes)
| CPatNotation (_,"( _ )",([a],[]),[]) ->
in_pat top scopes a
| CPatNotation (loc, ntn, fullargs,extrargs) ->
let ntn,(args,argsl as fullargs) = contract_pat_notation ntn fullargs in
let ((ids',c),df) = Notation.interp_notation loc ntn scopes in
let (ids',idsl',_) = split_by_type ids' in
Dumpglob.dump_notation_location (patntn_loc loc fullargs ntn) ntn df;
let substlist = make_subst idsl' argsl in
let subst = make_subst ids' args in
in_not top loc scopes (subst,substlist) extrargs c
| CPatDelimiters (loc, key, e) ->
in_pat top (None,find_delimiters_scope loc key::snd scopes) e
| CPatPrim (loc,p) -> fst (Notation.interp_prim_token_cases_pattern_expr loc (test_kind false) p scopes)
| CPatAtom (loc, Some id) ->
begin
match drop_syndef top scopes id [] with
|Some (a,b,c) -> RCPatCstr (loc, a, b, c)
|None -> RCPatAtom (loc, Some (find_pattern_variable id))
end
| CPatAtom (loc,None) -> RCPatAtom (loc,None)
| CPatOr (loc, pl) ->
RCPatOr (loc,List.map (in_pat top scopes) pl)
and in_pat_sc scopes x = in_pat false (x,snd scopes)
and in_not top loc scopes (subst,substlist as fullsubst) args = function
| NVar id ->
let () = assert (List.is_empty args) in
begin
(* subst remembers the delimiters stack in the interpretation *)
(* of the notations *)
try
let (a,(scopt,subscopes)) = Id.Map.find id subst in
in_pat top (scopt,subscopes@snd scopes) a
with Not_found ->
if Id.equal id ldots_var then RCPatAtom (loc,Some id) else
anomaly (str "Unbound pattern notation variable: " ++ Id.print id)
end
| NRef g ->
ensure_kind top loc g;
let (_,argscs) = find_remaining_scopes [] args g in
RCPatCstr (loc, g, [], List.map2 (in_pat_sc scopes) argscs args)
| NApp (NRef g,pl) ->
ensure_kind top loc g;
let (argscs1,argscs2) = find_remaining_scopes pl args g in
RCPatCstr (loc, g,
List.map2 (fun x -> in_not false loc (x,snd scopes) fullsubst []) argscs1 pl @
List.map (in_pat false scopes) args, [])
| NList (x,_,iter,terminator,lassoc) ->
if not (List.is_empty args) then user_err_loc
(loc,"",strbrk "Application of arguments to a recursive notation not supported in patterns.");
(try
(* All elements of the list are in scopes (scopt,subscopes) *)
let (l,(scopt,subscopes)) = Id.Map.find x substlist in
let termin = in_not top loc scopes fullsubst [] terminator in
List.fold_right (fun a t ->
let nsubst = Id.Map.add x (a, (scopt, subscopes)) subst in
let u = in_not false loc scopes (nsubst, substlist) [] iter in
subst_pat_iterator ldots_var t u)
(if lassoc then List.rev l else l) termin
with Not_found ->
anomaly (Pp.str "Inconsistent substitution of recursive notation"))
| NHole _ ->
let () = assert (List.is_empty args) in
RCPatAtom (loc, None)
| t -> error_invalid_pattern_notation loc
in in_pat true
let rec intern_pat genv aliases pat =
let intern_cstr_with_all_args loc c with_letin idslpl1 pl2 =
let idslpl2 = List.map (intern_pat genv empty_alias) pl2 in
let (ids',pll) = product_of_cases_patterns aliases.alias_ids (idslpl1@idslpl2) in
let pl' = List.map (fun (asubst,pl) ->
(asubst, PatCstr (loc,c,chop_params_pattern loc (fst c) pl with_letin,alias_of aliases))) pll in
ids',pl' in
match pat with
| RCPatAlias (loc, p, id) ->
let aliases' = merge_aliases aliases id in
intern_pat genv aliases' p
| RCPatCstr (loc, head, expl_pl, pl) ->
if !asymmetric_patterns then
let len = if List.is_empty expl_pl then Some (List.length pl) else None in
let c,idslpl1 = find_constructor loc len head in
let with_letin =
check_constructor_length genv loc c (List.length idslpl1 + List.length expl_pl) pl in
intern_cstr_with_all_args loc c with_letin idslpl1 (expl_pl@pl)
else
let c,idslpl1 = find_constructor loc None head in
let with_letin, pl2 =
add_implicits_check_constructor_length genv loc c (List.length idslpl1 + List.length expl_pl) pl in
intern_cstr_with_all_args loc c with_letin idslpl1 (expl_pl@pl2)
| RCPatAtom (loc, Some id) ->
let aliases = merge_aliases aliases id in
(aliases.alias_ids,[aliases.alias_map, PatVar (loc, alias_of aliases)])
| RCPatAtom (loc, None) ->
let { alias_ids = ids; alias_map = asubst; } = aliases in
(ids, [asubst, PatVar (loc, alias_of aliases)])
| RCPatOr (loc, pl) ->
assert (not (List.is_empty pl));
let pl' = List.map (intern_pat genv aliases) pl in
let (idsl,pl') = List.split pl' in
let ids = List.hd idsl in
check_or_pat_variables loc ids (List.tl idsl);
(ids,List.flatten pl')
let intern_cases_pattern genv scopes aliases pat =
intern_pat genv aliases
(drop_notations_pattern (function ConstructRef _ -> () | _ -> raise Not_found) scopes pat)
let intern_ind_pattern genv scopes pat =
let no_not =
try
drop_notations_pattern (function (IndRef _ | ConstructRef _) -> () | _ -> raise Not_found) scopes pat
with InternalizationError(loc,NotAConstructor _) -> error_bad_inductive_type loc
in
match no_not with
| RCPatCstr (loc, head, expl_pl, pl) ->
let c = (function IndRef ind -> ind | _ -> error_bad_inductive_type loc) head in
let with_letin, pl2 = add_implicits_check_ind_length genv loc c
(List.length expl_pl) pl in
let idslpl1 = List.rev_map (intern_pat genv empty_alias) expl_pl in
let idslpl2 = List.map (intern_pat genv empty_alias) pl2 in
(with_letin,
match product_of_cases_patterns [] (List.rev_append idslpl1 idslpl2) with
| _,[_,pl] -> (c,chop_params_pattern loc c pl with_letin)
| _ -> error_bad_inductive_type loc)
| x -> error_bad_inductive_type (raw_cases_pattern_expr_loc x)
(**********************************************************************)
(* Utilities for application *)
let merge_impargs l args =
let test x = function
| (_, Some (_, y)) -> explicitation_eq x y
| _ -> false
in
List.fold_right (fun a l ->
match a with
| (_,Some (_,(ExplByName id as x))) when
List.exists (test x) args -> l
| _ -> a::l)
l args
let get_implicit_name n imps =
Some (Impargs.name_of_implicit (List.nth imps (n-1)))
let set_hole_implicit i b = function
| GRef (loc,r,_) | GApp (_,GRef (loc,r,_),_) -> (loc,Evar_kinds.ImplicitArg (r,i,b),Misctypes.IntroAnonymous,None)
| GVar (loc,id) -> (loc,Evar_kinds.ImplicitArg (VarRef id,i,b),Misctypes.IntroAnonymous,None)
| _ -> anomaly (Pp.str "Only refs have implicits")
let exists_implicit_name id =
List.exists (fun imp -> is_status_implicit imp && Id.equal id (name_of_implicit imp))
let extract_explicit_arg imps args =
let rec aux = function
| [] -> Id.Map.empty, []
| (a,e)::l ->
let (eargs,rargs) = aux l in
match e with
| None -> (eargs,a::rargs)
| Some (loc,pos) ->
let id = match pos with
| ExplByName id ->
if not (exists_implicit_name id imps) then
user_err_loc
(loc,"",str "Wrong argument name: " ++ pr_id id ++ str ".");
if Id.Map.mem id eargs then
user_err_loc (loc,"",str "Argument name " ++ pr_id id
++ str " occurs more than once.");
id
| ExplByPos (p,_id) ->
let id =
try
let imp = List.nth imps (p-1) in
if not (is_status_implicit imp) then failwith "imp";
name_of_implicit imp
with Failure _ (* "nth" | "imp" *) ->
user_err_loc
(loc,"",str"Wrong argument position: " ++ int p ++ str ".")
in
if Id.Map.mem id eargs then
user_err_loc (loc,"",str"Argument at position " ++ int p ++
str " is mentioned more than once.");
id in
(Id.Map.add id (loc, a) eargs, rargs)
in aux args
(**********************************************************************)
(* Main loop *)
let internalize globalenv env allow_patvar lvar c =
let rec intern env = function
| CRef (ref,us) as x ->
let (c,imp,subscopes,l),_ =
intern_applied_reference intern env (Environ.named_context globalenv)
lvar us [] ref
in
apply_impargs c env imp subscopes l (constr_loc x)
| CFix (loc, (locid,iddef), dl) ->
let lf = List.map (fun ((_, id),_,_,_,_) -> id) dl in
let dl = Array.of_list dl in
let n =
try List.index0 Id.equal iddef lf
with Not_found ->
raise (InternalizationError (locid,UnboundFixName (false,iddef)))
in
let idl_temp = Array.map
(fun (id,(n,order),bl,ty,_) ->
let intern_ro_arg f =
let before, after = split_at_annot bl n in
let (env',rbefore) =
List.fold_left intern_local_binder (env,[]) before in
let ro = f (intern env') in
let n' = Option.map (fun _ -> List.count (fun (_,(_,_,b,_)) -> (* remove let-ins *) b = None) rbefore) n in
n', ro, List.fold_left intern_local_binder (env',rbefore) after
in
let n, ro, (env',rbl) =
match order with
| CStructRec ->
intern_ro_arg (fun _ -> GStructRec)
| CWfRec c ->
intern_ro_arg (fun f -> GWfRec (f c))
| CMeasureRec (m,r) ->
intern_ro_arg (fun f -> GMeasureRec (f m, Option.map f r))
in
((n, ro), List.rev rbl, intern_type env' ty, env')) dl in
let idl = Array.map2 (fun (_,_,_,_,bd) (a,b,c,env') ->
let env'' = List.fold_left_i (fun i en name ->
let (_,bli,tyi,_) = idl_temp.(i) in
let fix_args = (List.map (fun (_,(na, bk, _, _)) -> (build_impls bk na)) bli) in
push_name_env lvar (impls_type_list ~args:fix_args tyi)
en (Loc.ghost, Name name)) 0 env' lf in
(a,b,c,intern {env'' with tmp_scope = None} bd)) dl idl_temp in
GRec (loc,GFix
(Array.map (fun (ro,_,_,_) -> ro) idl,n),
Array.of_list lf,
Array.map (fun (_,bl,_,_) -> List.map snd bl) idl,
Array.map (fun (_,_,ty,_) -> ty) idl,
Array.map (fun (_,_,_,bd) -> bd) idl)
| CCoFix (loc, (locid,iddef), dl) ->
let lf = List.map (fun ((_, id),_,_,_) -> id) dl in
let dl = Array.of_list dl in
let n =
try List.index0 Id.equal iddef lf
with Not_found ->
raise (InternalizationError (locid,UnboundFixName (true,iddef)))
in
let idl_tmp = Array.map
(fun ((loc,id),bl,ty,_) ->
let (env',rbl) =
List.fold_left intern_local_binder (env,[]) bl in
(List.rev rbl,
intern_type env' ty,env')) dl in
let idl = Array.map2 (fun (_,_,_,bd) (b,c,env') ->
let env'' = List.fold_left_i (fun i en name ->
let (bli,tyi,_) = idl_tmp.(i) in
let cofix_args = List.map (fun (_, (na, bk, _, _)) -> (build_impls bk na)) bli in
push_name_env lvar (impls_type_list ~args:cofix_args tyi)
en (Loc.ghost, Name name)) 0 env' lf in
(b,c,intern {env'' with tmp_scope = None} bd)) dl idl_tmp in
GRec (loc,GCoFix n,
Array.of_list lf,
Array.map (fun (bl,_,_) -> List.map snd bl) idl,
Array.map (fun (_,ty,_) -> ty) idl,
Array.map (fun (_,_,bd) -> bd) idl)
| CProdN (loc,[],c2) ->
intern_type env c2
| CProdN (loc,(nal,bk,ty)::bll,c2) ->
iterate_prod loc env bk ty (CProdN (loc, bll, c2)) nal
| CLambdaN (loc,[],c2) ->
intern env c2
| CLambdaN (loc,(nal,bk,ty)::bll,c2) ->
iterate_lam loc (reset_tmp_scope env) bk ty (CLambdaN (loc, bll, c2)) nal
| CLetIn (loc,na,c1,c2) ->
let inc1 = intern (reset_tmp_scope env) c1 in
GLetIn (loc, snd na, inc1,
intern (push_name_env lvar (impls_term_list inc1) env na) c2)
| CNotation (loc,"- _",([CPrim (_,Numeral p)],[],[]))
when Bigint.is_strictly_pos p ->
intern env (CPrim (loc,Numeral (Bigint.neg p)))
| CNotation (_,"( _ )",([a],[],[])) -> intern env a
| CNotation (loc,ntn,args) ->
intern_notation intern env lvar loc ntn args
| CGeneralization (loc,b,a,c) ->
intern_generalization intern env lvar loc b a c
| CPrim (loc, p) ->
fst (Notation.interp_prim_token loc p (env.tmp_scope,env.scopes))
| CDelimiters (loc, key, e) ->
intern {env with tmp_scope = None;
scopes = find_delimiters_scope loc key :: env.scopes} e
| CAppExpl (loc, (isproj,ref,us), args) ->
let (f,_,args_scopes,_),args =
let args = List.map (fun a -> (a,None)) args in
intern_applied_reference intern env (Environ.named_context globalenv)
lvar us args ref
in
(* Rem: GApp(_,f,[]) stands for @f *)
GApp (loc, f, intern_args env args_scopes (List.map fst args))
| CApp (loc, (isproj,f), args) ->
let f,args = match f with
(* Compact notations like "t.(f args') args" *)
| CApp (_,(Some _,f), args') when not (Option.has_some isproj) ->
f,args'@args
(* Don't compact "(f args') args" to resolve implicits separately *)
| _ -> f,args in
let (c,impargs,args_scopes,l),args =
match f with
| CRef (ref,us) ->
intern_applied_reference intern env
(Environ.named_context globalenv) lvar us args ref
| CNotation (loc,ntn,([],[],[])) ->
let c = intern_notation intern env lvar loc ntn ([],[],[]) in
let x, impl, scopes, l = find_appl_head_data c in
(x,impl,scopes,l), args
| x -> (intern env f,[],[],[]), args in
apply_impargs c env impargs args_scopes
(merge_impargs l args) loc
| CRecord (loc, fs) ->
let cargs =
sort_fields true loc fs
(fun k l -> CHole (loc, Some (Evar_kinds.QuestionMark (Evar_kinds.Define true)), Misctypes.IntroAnonymous, None) :: l)
in
begin
match cargs with
| None -> user_err_loc (loc, "intern", str"No constructor inference.")
| Some (n, constrname, args) ->
let pars = List.make n (CHole (loc, None, Misctypes.IntroAnonymous, None)) in
let app = CAppExpl (loc, (None, constrname,None), List.rev_append pars args) in
intern env app
end
| CCases (loc, sty, rtnpo, tms, eqns) ->
let as_in_vars = List.fold_left (fun acc (_,na,inb) ->
Option.fold_left (fun acc tt -> Id.Set.union (ids_of_cases_indtype tt) acc)
(Option.fold_left (fun acc (_,y) -> name_fold Id.Set.add y acc) acc na)
inb) Id.Set.empty tms in
(* as, in & return vars *)
let forbidden_vars = Option.cata free_vars_of_constr_expr as_in_vars rtnpo in
let tms,ex_ids,match_from_in = List.fold_right
(fun citm (inds,ex_ids,matchs) ->
let ((tm,ind),extra_id,match_td) = intern_case_item env forbidden_vars citm in
(tm,ind)::inds, Option.fold_right Id.Set.add extra_id ex_ids, List.rev_append match_td matchs)
tms ([],Id.Set.empty,[]) in
let env' = Id.Set.fold
(fun var bli -> push_name_env lvar (Variable,[],[],[]) bli (Loc.ghost,Name var))
(Id.Set.union ex_ids as_in_vars) (reset_hidden_inductive_implicit_test env) in
(* PatVars before a real pattern do not need to be matched *)
let stripped_match_from_in =
let rec aux = function
| [] -> []
| (_,PatVar _) :: q -> aux q
| l -> l
in aux match_from_in in
let rtnpo = match stripped_match_from_in with
| [] -> Option.map (intern_type env') rtnpo (* Only PatVar in "in" clauses *)
| l ->
(* Build a return predicate by expansion of the patterns of the "in" clause *)
let thevars,thepats = List.split l in
let sub_rtn = (* Some (GSort (Loc.ghost,GType None)) *) None in
let sub_tms = List.map (fun id -> GVar (Loc.ghost,id),(Name id,None)) thevars (* "match v1,..,vn" *) in
let main_sub_eqn =
(Loc.ghost,[],thepats, (* "|p1,..,pn" *)
Option.cata (intern_type env')
(GHole(Loc.ghost,Evar_kinds.CasesType false,Misctypes.IntroAnonymous,None))
rtnpo) (* "=> P" if there were a return predicate P, and "=> _" otherwise *) in
let catch_all_sub_eqn =
if List.for_all (irrefutable globalenv) thepats then [] else
[Loc.ghost,[],List.make (List.length thepats) (PatVar(Loc.ghost,Anonymous)), (* "|_,..,_" *)
GHole(Loc.ghost,Evar_kinds.ImpossibleCase,Misctypes.IntroAnonymous,None)] (* "=> _" *) in
Some (GCases(Loc.ghost,Term.RegularStyle,sub_rtn,sub_tms,main_sub_eqn::catch_all_sub_eqn))
in
let eqns' = List.map (intern_eqn (List.length tms) env) eqns in
GCases (loc, sty, rtnpo, tms, List.flatten eqns')
| CLetTuple (loc, nal, (na,po), b, c) ->
let env' = reset_tmp_scope env in
(* "in" is None so no match to add *)
let ((b',(na',_)),_,_) = intern_case_item env' Id.Set.empty (b,na,None) in
let p' = Option.map (fun u ->
let env'' = push_name_env lvar (Variable,[],[],[]) (reset_hidden_inductive_implicit_test env')
(Loc.ghost,na') in
intern_type env'' u) po in
GLetTuple (loc, List.map snd nal, (na', p'), b',
intern (List.fold_left (push_name_env lvar (Variable,[],[],[])) (reset_hidden_inductive_implicit_test env) nal) c)
| CIf (loc, c, (na,po), b1, b2) ->
let env' = reset_tmp_scope env in
let ((c',(na',_)),_,_) = intern_case_item env' Id.Set.empty (c,na,None) in (* no "in" no match to ad too *)
let p' = Option.map (fun p ->
let env'' = push_name_env lvar (Variable,[],[],[]) (reset_hidden_inductive_implicit_test env)
(Loc.ghost,na') in
intern_type env'' p) po in
GIf (loc, c', (na', p'), intern env b1, intern env b2)
| CHole (loc, k, naming, solve) ->
let k = match k with
| None -> Evar_kinds.QuestionMark (Evar_kinds.Define true)
| Some k -> k
in
let solve = match solve with
| None -> None
| Some gen ->
let (ltacvars, ntnvars) = lvar in
let ntnvars = Id.Map.domain ntnvars in
let lvars = Id.Set.union ltacvars.ltac_bound ltacvars.ltac_vars in
let lvars = Id.Set.union lvars ntnvars in
let lvars = Id.Set.union lvars env.ids in
let ist = {
Genintern.ltacvars = lvars;
genv = globalenv;
} in
let (_, glb) = Genintern.generic_intern ist gen in
Some glb
in
GHole (loc, k, naming, solve)
(* Parsing pattern variables *)
| CPatVar (loc, n) when allow_patvar ->
GPatVar (loc, (true,n))
| CEvar (loc, n, []) when allow_patvar ->
GPatVar (loc, (false,n))
(* end *)
(* Parsing existential variables *)
| CEvar (loc, n, l) ->
GEvar (loc, n, List.map (on_snd (intern env)) l)
| CPatVar (loc, _) ->
raise (InternalizationError (loc,IllegalMetavariable))
(* end *)
| CSort (loc, s) ->
GSort(loc,s)
| CCast (loc, c1, c2) ->
GCast (loc,intern env c1, Miscops.map_cast_type (intern_type env) c2)
and intern_type env = intern (set_type_scope env)
and intern_local_binder env bind =
intern_local_binder_aux intern lvar env bind
(* Expands a multiple pattern into a disjunction of multiple patterns *)
and intern_multiple_pattern env n (loc,pl) =
let idsl_pll = List.map (intern_cases_pattern globalenv (None,env.scopes) empty_alias) pl in
check_number_of_pattern loc n pl;
product_of_cases_patterns [] idsl_pll
(* Expands a disjunction of multiple pattern *)
and intern_disjunctive_multiple_pattern env loc n mpl =
assert (not (List.is_empty mpl));
let mpl' = List.map (intern_multiple_pattern env n) mpl in
let (idsl,mpl') = List.split mpl' in
let ids = List.hd idsl in
check_or_pat_variables loc ids (List.tl idsl);
(ids,List.flatten mpl')
(* Expands a pattern-matching clause [lhs => rhs] *)
and intern_eqn n env (loc,lhs,rhs) =
let eqn_ids,pll = intern_disjunctive_multiple_pattern env loc n lhs in
(* Linearity implies the order in ids is irrelevant *)
check_linearity lhs eqn_ids;
let env_ids = List.fold_right Id.Set.add eqn_ids env.ids in
List.map (fun (asubst,pl) ->
let rhs = replace_vars_constr_expr asubst rhs in
Id.Map.iter message_redundant_alias asubst;
let rhs' = intern {env with ids = env_ids} rhs in
(loc,eqn_ids,pl,rhs')) pll
and intern_case_item env forbidden_names_for_gen (tm,na,t) =
(* the "match" part *)
let tm' = intern env tm in
(* the "as" part *)
let extra_id,na = match tm', na with
| GVar (loc,id), None when not (Id.Map.mem id (snd lvar)) -> Some id,(loc,Name id)
| GRef (loc, VarRef id, _), None -> Some id,(loc,Name id)
| _, None -> None,(Loc.ghost,Anonymous)
| _, Some (loc,na) -> None,(loc,na) in
(* the "in" part *)
let match_td,typ = match t with
| Some t ->
let with_letin,(ind,l) = intern_ind_pattern globalenv (None,env.scopes) t in
let (mib,mip) = Inductive.lookup_mind_specif globalenv ind in
let nparams = (List.length (mib.Declarations.mind_params_ctxt)) in
(* for "in Vect n", we answer (["n","n"],[(loc,"n")])
for "in Vect (S n)", we answer ((match over "m", relevant branch is "S
n"), abstract over "m") = ([("m","S n")],[(loc,"m")]) where "m" is
generated from the canonical name of the inductive and outside of
{forbidden_names_for_gen} *)
let (match_to_do,nal) =
let rec canonize_args case_rel_ctxt arg_pats forbidden_names match_acc var_acc =
let add_name l = function
| _,Anonymous -> l
| loc,(Name y as x) -> (y,PatVar(loc,x)) :: l in
match case_rel_ctxt,arg_pats with
(* LetIn in the rel_context *)
| LocalDef _ :: t, l when not with_letin ->
canonize_args t l forbidden_names match_acc ((Loc.ghost,Anonymous)::var_acc)
| [],[] ->
(add_name match_acc na, var_acc)
| _::t,PatVar (loc,x)::tt ->
canonize_args t tt forbidden_names
(add_name match_acc (loc,x)) ((loc,x)::var_acc)
| (LocalAssum (cano_name,ty) | LocalDef (cano_name,_,ty)) :: t, c::tt ->
let fresh =
Namegen.next_name_away_with_default_using_types "iV" cano_name forbidden_names ty in
canonize_args t tt (fresh::forbidden_names)
((fresh,c)::match_acc) ((cases_pattern_loc c,Name fresh)::var_acc)
| _ -> assert false in
let _,args_rel =
List.chop nparams (List.rev mip.Declarations.mind_arity_ctxt) in
canonize_args args_rel l (Id.Set.elements forbidden_names_for_gen) [] [] in
match_to_do, Some (cases_pattern_expr_loc t,ind,List.rev_map snd nal)
| None ->
[], None in
(tm',(snd na,typ)), extra_id, match_td
and iterate_prod loc2 env bk ty body nal =
let env, bl = intern_assumption intern lvar env nal bk ty in
it_mkGProd loc2 bl (intern_type env body)
and iterate_lam loc2 env bk ty body nal =
let env, bl = intern_assumption intern lvar env nal bk ty in
it_mkGLambda loc2 bl (intern env body)
and intern_impargs c env l subscopes args =
let eargs, rargs = extract_explicit_arg l args in
if !parsing_explicit then
if Id.Map.is_empty eargs then intern_args env subscopes rargs
else error "Arguments given by name or position not supported in explicit mode."
else
let rec aux n impl subscopes eargs rargs =
let (enva,subscopes') = apply_scope_env env subscopes in
match (impl,rargs) with
| (imp::impl', rargs) when is_status_implicit imp ->
begin try
let id = name_of_implicit imp in
let (_,a) = Id.Map.find id eargs in
let eargs' = Id.Map.remove id eargs in
intern enva a :: aux (n+1) impl' subscopes' eargs' rargs
with Not_found ->
if List.is_empty rargs && Id.Map.is_empty eargs && not (maximal_insertion_of imp) then
(* Less regular arguments than expected: complete *)
(* with implicit arguments if maximal insertion is set *)
[]
else
GHole (set_hole_implicit (n,get_implicit_name n l) (force_inference_of imp) c) ::
aux (n+1) impl' subscopes' eargs rargs
end
| (imp::impl', a::rargs') ->
intern enva a :: aux (n+1) impl' subscopes' eargs rargs'
| (imp::impl', []) ->
if not (Id.Map.is_empty eargs) then
(let (id,(loc,_)) = Id.Map.choose eargs in
user_err_loc (loc,"",str "Not enough non implicit \
arguments to accept the argument bound to " ++
pr_id id ++ str"."));
[]
| ([], rargs) ->
assert (Id.Map.is_empty eargs);
intern_args env subscopes rargs
in aux 1 l subscopes eargs rargs
and apply_impargs c env imp subscopes l loc =
let imp = select_impargs_size (List.length (List.filter (fun (_,x) -> x == None) l)) imp in
let l = intern_impargs c env imp subscopes l in
smart_gapp c loc l
and smart_gapp f loc = function
| [] -> f
| l -> match f with
| GApp (loc', g, args) -> GApp (Loc.merge loc' loc, g, args@l)
| _ -> GApp (Loc.merge (loc_of_glob_constr f) loc, f, l)
and intern_args env subscopes = function
| [] -> []
| a::args ->
let (enva,subscopes) = apply_scope_env env subscopes in
(intern enva a) :: (intern_args env subscopes args)
in
try
intern env c
with
InternalizationError (loc,e) ->
user_err_loc (loc,"internalize",
explain_internalization_error e)
(**************************************************************************)
(* Functions to translate constr_expr into glob_constr *)
(**************************************************************************)
let extract_ids env =
List.fold_right Id.Set.add
(Termops.ids_of_rel_context (Environ.rel_context env))
Id.Set.empty
let scope_of_type_kind = function
| IsType -> Notation.current_type_scope_name ()
| OfType typ -> compute_type_scope typ
| WithoutTypeConstraint -> None
let empty_ltac_sign = {
ltac_vars = Id.Set.empty;
ltac_bound = Id.Set.empty;
}
let intern_gen kind env
?(impls=empty_internalization_env) ?(allow_patvar=false) ?(ltacvars=empty_ltac_sign)
c =
let tmp_scope = scope_of_type_kind kind in
internalize env {ids = extract_ids env; unb = false;
tmp_scope = tmp_scope; scopes = [];
impls = impls}
allow_patvar (ltacvars, Id.Map.empty) c
let intern_constr env c = intern_gen WithoutTypeConstraint env c
let intern_type env c = intern_gen IsType env c
let intern_pattern globalenv patt =
try
intern_cases_pattern globalenv (None,[]) empty_alias patt
with
InternalizationError (loc,e) ->
user_err_loc (loc,"internalize",explain_internalization_error e)
(*********************************************************************)
(* Functions to parse and interpret constructions *)
(* All evars resolved *)
let interp_gen kind env sigma ?(impls=empty_internalization_env) c =
let c = intern_gen kind ~impls env c in
understand ~expected_type:kind env sigma c
let interp_constr env sigma ?(impls=empty_internalization_env) c =
interp_gen WithoutTypeConstraint env sigma c
let interp_type env sigma ?(impls=empty_internalization_env) c =
interp_gen IsType env sigma ~impls c
let interp_casted_constr env sigma ?(impls=empty_internalization_env) c typ =
interp_gen (OfType typ) env sigma ~impls c
(* Not all evars expected to be resolved *)
let interp_open_constr env sigma c =
understand_tcc env sigma (intern_constr env c)
(* Not all evars expected to be resolved and computation of implicit args *)
let interp_constr_evars_gen_impls env evdref
?(impls=empty_internalization_env) expected_type c =
let c = intern_gen expected_type ~impls env c in
let imps = Implicit_quantifiers.implicits_of_glob_constr ~with_products:(expected_type == IsType) c in
understand_tcc_evars env evdref ~expected_type c, imps
let interp_constr_evars_impls env evdref ?(impls=empty_internalization_env) c =
interp_constr_evars_gen_impls env evdref ~impls WithoutTypeConstraint c
let interp_casted_constr_evars_impls env evdref ?(impls=empty_internalization_env) c typ =
interp_constr_evars_gen_impls env evdref ~impls (OfType typ) c
let interp_type_evars_impls env evdref ?(impls=empty_internalization_env) c =
interp_constr_evars_gen_impls env evdref ~impls IsType c
(* Not all evars expected to be resolved, with side-effect on evars *)
let interp_constr_evars_gen env evdref ?(impls=empty_internalization_env) expected_type c =
let c = intern_gen expected_type ~impls env c in
understand_tcc_evars env evdref ~expected_type c
let interp_constr_evars env evdref ?(impls=empty_internalization_env) c =
interp_constr_evars_gen env evdref WithoutTypeConstraint ~impls c
let interp_casted_constr_evars env evdref ?(impls=empty_internalization_env) c typ =
interp_constr_evars_gen env evdref ~impls (OfType typ) c
let interp_type_evars env evdref ?(impls=empty_internalization_env) c =
interp_constr_evars_gen env evdref IsType ~impls c
(* Miscellaneous *)
let intern_constr_pattern env ?(as_type=false) ?(ltacvars=empty_ltac_sign) c =
let c = intern_gen (if as_type then IsType else WithoutTypeConstraint)
~allow_patvar:true ~ltacvars env c in
pattern_of_glob_constr c
let interp_notation_constr ?(impls=empty_internalization_env) nenv a =
let env = Global.env () in
(* [vl] is intended to remember the scope of the free variables of [a] *)
let vl = Id.Map.map (fun typ -> (ref true, ref None, typ)) nenv.ninterp_var_type in
let c = internalize (Global.env()) {ids = extract_ids env; unb = false;
tmp_scope = None; scopes = []; impls = impls}
false (empty_ltac_sign, vl) a in
(* Translate and check that [c] has all its free variables bound in [vars] *)
let a = notation_constr_of_glob_constr nenv c in
(* Splits variables into those that are binding, bound, or both *)
(* binding and bound *)
let out_scope = function None -> None,[] | Some (a,l) -> a,l in
let vars = Id.Map.map (fun (isonlybinding, sc, typ) ->
(!isonlybinding, out_scope !sc, typ)) vl in
(* Returns [a] and the ordered list of variables with their scopes *)
vars, a
(* Interpret binders and contexts *)
let interp_binder env sigma na t =
let t = intern_gen IsType env t in
let t' = locate_if_hole (loc_of_glob_constr t) na t in
understand ~expected_type:IsType env sigma t'
let interp_binder_evars env evdref na t =
let t = intern_gen IsType env t in
let t' = locate_if_hole (loc_of_glob_constr t) na t in
understand_tcc_evars env evdref ~expected_type:IsType t'
open Environ
let my_intern_constr env lvar acc c =
internalize env acc false lvar c
let intern_context global_level env impl_env binders =
try
let lvar = (empty_ltac_sign, Id.Map.empty) in
let lenv, bl = List.fold_left
(intern_local_binder_aux ~global_level (my_intern_constr env lvar) lvar)
({ids = extract_ids env; unb = false;
tmp_scope = None; scopes = []; impls = impl_env}, []) binders in
(lenv.impls, List.map snd bl)
with InternalizationError (loc,e) ->
user_err_loc (loc,"internalize", explain_internalization_error e)
let interp_rawcontext_evars env evdref k bl =
let (env, par, _, impls) =
List.fold_left
(fun (env,params,n,impls) (na, k, b, t) ->
match b with
None ->
let t' = locate_if_hole (loc_of_glob_constr t) na t in
let t =
understand_tcc_evars env evdref ~expected_type:IsType t' in
let d = LocalAssum (na,t) in
let impls =
if k == Implicit then
let na = match na with Name n -> Some n | Anonymous -> None in
(ExplByPos (n, na), (true, true, true)) :: impls
else impls
in
(push_rel d env, d::params, succ n, impls)
| Some b ->
let c = understand_judgment_tcc env evdref b in
let d = LocalDef (na, c.uj_val, c.uj_type) in
(push_rel d env, d::params, n, impls))
(env,[],k+1,[]) (List.rev bl)
in (env, par), impls
let interp_context_evars ?(global_level=false) ?(impl_env=empty_internalization_env) ?(shift=0) env evdref params =
let int_env,bl = intern_context global_level env impl_env params in
let x = interp_rawcontext_evars env evdref shift bl in
int_env, x
|