+++ /dev/null
-(* Copyright (C) 2000, HELM Team.
- *
- * This file is part of HELM, an Hypertextual, Electronic
- * Library of Mathematics, developed at the Computer Science
- * Department, University of Bologna, Italy.
- *
- * HELM is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * HELM is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with HELM; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- *
- * For details, see the HELM World-Wide-Web page,
- * http://cs.unibo.it/helm/.
- *)
-
-exception CicReductionInternalError;;
-exception WrongUriToInductiveDefinition;;
-exception Impossible of int;;
-exception ReferenceToConstant;;
-exception ReferenceToVariable;;
-exception ReferenceToCurrentProof;;
-exception ReferenceToInductiveDefinition;;
-
-let fdebug = ref 1;;
-let debug t env s =
- let rec debug_aux t i =
- let module C = Cic in
- let module U = UriManager in
- CicPp.ppobj (C.Variable ("DEBUG", None, t, [])) ^ "\n" ^ i
- in
- if !fdebug = 0 then
- begin
- print_endline (s ^ "\n" ^ List.fold_right debug_aux (t::env) "") ;
- flush stdout
- end
-;;
-
-module type Strategy =
- sig
- type stack_term
- type env_term
- type ens_term
- val to_stack : Cic.term -> stack_term
- val to_stack_list : Cic.term list -> stack_term list
- val to_env : Cic.term -> env_term
- val to_ens : Cic.term -> ens_term
- val from_stack :
- unwind:
- (int -> env_term list -> ens_term Cic.explicit_named_substitution ->
- Cic.term -> Cic.term) ->
- stack_term -> Cic.term
- val from_stack_list :
- unwind:
- (int -> env_term list -> ens_term Cic.explicit_named_substitution ->
- Cic.term -> Cic.term) ->
- stack_term list -> Cic.term list
- val from_env : env_term -> Cic.term
- val from_ens : ens_term -> Cic.term
- val stack_to_env :
- reduce:
- (int * env_term list * ens_term Cic.explicit_named_substitution *
- Cic.term * stack_term list -> Cic.term) ->
- unwind:
- (int -> env_term list -> ens_term Cic.explicit_named_substitution ->
- Cic.term -> Cic.term) ->
- stack_term -> env_term
- val compute_to_env :
- reduce:
- (int * env_term list * ens_term Cic.explicit_named_substitution * Cic.term *
- stack_term list -> Cic.term) ->
- unwind:
- (int -> env_term list -> ens_term Cic.explicit_named_substitution ->
- Cic.term -> Cic.term) ->
- int -> env_term list -> ens_term Cic.explicit_named_substitution ->
- Cic.term -> env_term
- val compute_to_stack :
- reduce:
- (int * env_term list * ens_term Cic.explicit_named_substitution * Cic.term *
- stack_term list -> Cic.term) ->
- unwind:
- (int -> env_term list -> ens_term Cic.explicit_named_substitution ->
- Cic.term -> Cic.term) ->
- int -> env_term list -> ens_term Cic.explicit_named_substitution ->
- Cic.term -> stack_term
- end
-;;
-
-module CallByNameStrategy =
- struct
- type stack_term = Cic.term
- type env_term = Cic.term
- type ens_term = Cic.term
- let to_stack v = v
- let to_stack_list l = l
- let to_env v = v
- let to_ens v = v
- let from_stack ~unwind v = v
- let from_stack_list ~unwind l = l
- let from_env v = v
- let from_ens v = v
- let stack_to_env ~reduce ~unwind v = v
- let compute_to_stack ~reduce ~unwind k e ens t = unwind k e ens t
- let compute_to_env ~reduce ~unwind k e ens t = unwind k e ens t
- end
-;;
-
-module CallByValueStrategy =
- struct
- type stack_term = Cic.term
- type env_term = Cic.term
- type ens_term = Cic.term
- let to_stack v = v
- let to_stack_list l = l
- let to_env v = v
- let to_ens v = v
- let from_stack ~unwind v = v
- let from_stack_list ~unwind l = l
- let from_env v = v
- let from_ens v = v
- let stack_to_env ~reduce ~unwind v = v
- let compute_to_stack ~reduce ~unwind k e ens t = reduce (k,e,ens,t,[])
- let compute_to_env ~reduce ~unwind k e ens t = reduce (k,e,ens,t,[])
- end
-;;
-
-module CallByValueStrategyByNameOnConstants =
- struct
- type stack_term = Cic.term
- type env_term = Cic.term
- type ens_term = Cic.term
- let to_stack v = v
- let to_stack_list l = l
- let to_env v = v
- let to_ens v = v
- let from_stack ~unwind v = v
- let from_stack_list ~unwind l = l
- let from_env v = v
- let from_ens v = v
- let stack_to_env ~reduce ~unwind v = v
- let compute_to_stack ~reduce ~unwind k e ens =
- function
- Cic.Const _ as t -> unwind k e ens t
- | t -> reduce (k,e,ens,t,[])
- let compute_to_env ~reduce ~unwind k e ens =
- function
- Cic.Const _ as t -> unwind k e ens t
- | t -> reduce (k,e,ens,t,[])
- end
-;;
-
-module LazyCallByValueStrategy =
- struct
- type stack_term = Cic.term lazy_t
- type env_term = Cic.term lazy_t
- type ens_term = Cic.term lazy_t
- let to_stack v = lazy v
- let to_stack_list l = List.map to_stack l
- let to_env v = lazy v
- let to_ens v = lazy v
- let from_stack ~unwind v = Lazy.force v
- let from_stack_list ~unwind l = List.map (from_stack ~unwind) l
- let from_env v = Lazy.force v
- let from_ens v = Lazy.force v
- let stack_to_env ~reduce ~unwind v = v
- let compute_to_stack ~reduce ~unwind k e ens t = lazy (reduce (k,e,ens,t,[]))
- let compute_to_env ~reduce ~unwind k e ens t = lazy (reduce (k,e,ens,t,[]))
- end
-;;
-
-module LazyCallByValueStrategyByNameOnConstants =
- struct
- type stack_term = Cic.term lazy_t
- type env_term = Cic.term lazy_t
- type ens_term = Cic.term lazy_t
- let to_stack v = lazy v
- let to_stack_list l = List.map to_stack l
- let to_env v = lazy v
- let to_ens v = lazy v
- let from_stack ~unwind v = Lazy.force v
- let from_stack_list ~unwind l = List.map (from_stack ~unwind) l
- let from_env v = Lazy.force v
- let from_ens v = Lazy.force v
- let stack_to_env ~reduce ~unwind v = v
- let compute_to_stack ~reduce ~unwind k e ens t =
- lazy (
- match t with
- Cic.Const _ as t -> unwind k e ens t
- | t -> reduce (k,e,ens,t,[]))
- let compute_to_env ~reduce ~unwind k e ens t =
- lazy (
- match t with
- Cic.Const _ as t -> unwind k e ens t
- | t -> reduce (k,e,ens,t,[]))
- end
-;;
-
-module LazyCallByNameStrategy =
- struct
- type stack_term = Cic.term lazy_t
- type env_term = Cic.term lazy_t
- type ens_term = Cic.term lazy_t
- let to_stack v = lazy v
- let to_stack_list l = List.map to_stack l
- let to_env v = lazy v
- let to_ens v = lazy v
- let from_stack ~unwind v = Lazy.force v
- let from_stack_list ~unwind l = List.map (from_stack ~unwind) l
- let from_env v = Lazy.force v
- let from_ens v = Lazy.force v
- let stack_to_env ~reduce ~unwind v = v
- let compute_to_stack ~reduce ~unwind k e ens t = lazy (unwind k e ens t)
- let compute_to_env ~reduce ~unwind k e ens t = lazy (unwind k e ens t)
- end
-;;
-
-module
- LazyCallByValueByNameOnConstantsWhenFromStack_ByNameStrategyWhenFromEnvOrEns
-=
- struct
- type stack_term = reduce:bool -> Cic.term
- type env_term = reduce:bool -> Cic.term
- type ens_term = reduce:bool -> Cic.term
- let to_stack v =
- let value = lazy v in
- fun ~reduce -> Lazy.force value
- let to_stack_list l = List.map to_stack l
- let to_env v =
- let value = lazy v in
- fun ~reduce -> Lazy.force value
- let to_ens v =
- let value = lazy v in
- fun ~reduce -> Lazy.force value
- let from_stack ~unwind v = (v ~reduce:false)
- let from_stack_list ~unwind l = List.map (from_stack ~unwind) l
- let from_env v = (v ~reduce:true)
- let from_ens v = (v ~reduce:true)
- let stack_to_env ~reduce ~unwind v = v
- let compute_to_stack ~reduce ~unwind k e ens t =
- let svalue =
- lazy (
- match t with
- Cic.Const _ as t -> unwind k e ens t
- | t -> reduce (k,e,ens,t,[])
- ) in
- let lvalue =
- lazy (unwind k e ens t)
- in
- fun ~reduce ->
- if reduce then Lazy.force svalue else Lazy.force lvalue
- let compute_to_env ~reduce ~unwind k e ens t =
- let svalue =
- lazy (
- match t with
- Cic.Const _ as t -> unwind k e ens t
- | t -> reduce (k,e,ens,t,[])
- ) in
- let lvalue =
- lazy (unwind k e ens t)
- in
- fun ~reduce ->
- if reduce then Lazy.force svalue else Lazy.force lvalue
- end
-;;
-
-module ClosuresOnStackByValueFromEnvOrEnsStrategy =
- struct
- type stack_term =
- int * Cic.term list * Cic.term Cic.explicit_named_substitution * Cic.term
- type env_term = Cic.term
- type ens_term = Cic.term
- let to_stack v = (0,[],[],v)
- let to_stack_list l = List.map to_stack l
- let to_env v = v
- let to_ens v = v
- let from_stack ~unwind (k,e,ens,t) = unwind k e ens t
- let from_stack_list ~unwind l = List.map (from_stack ~unwind) l
- let from_env v = v
- let from_ens v = v
- let stack_to_env ~reduce ~unwind (k,e,ens,t) = reduce (k,e,ens,t,[])
- let compute_to_env ~reduce ~unwind k e ens t =
- unwind k e ens t
- let compute_to_stack ~reduce ~unwind k e ens t = (k,e,ens,t)
- end
-;;
-
-module ClosuresOnStackByValueFromEnvOrEnsByNameOnConstantsStrategy =
- struct
- type stack_term =
- int * Cic.term list * Cic.term Cic.explicit_named_substitution * Cic.term
- type env_term = Cic.term
- type ens_term = Cic.term
- let to_stack v = (0,[],[],v)
- let to_stack_list l = List.map to_stack l
- let to_env v = v
- let to_ens v = v
- let from_stack ~unwind (k,e,ens,t) = unwind k e ens t
- let from_stack_list ~unwind l = List.map (from_stack ~unwind) l
- let from_env v = v
- let from_ens v = v
- let stack_to_env ~reduce ~unwind (k,e,ens,t) =
- match t with
- Cic.Const _ as t -> unwind k e ens t
- | t -> reduce (k,e,ens,t,[])
- let compute_to_env ~reduce ~unwind k e ens t =
- unwind k e ens t
- let compute_to_stack ~reduce ~unwind k e ens t = (k,e,ens,t)
- end
-;;
-
-module Reduction(RS : Strategy) =
- struct
- type env = RS.env_term list
- type ens = RS.ens_term Cic.explicit_named_substitution
- type stack = RS.stack_term list
- type config = int * env * ens * Cic.term * stack
-
- (* k is the length of the environment e *)
- (* m is the current depth inside the term *)
- let unwind' m k e ens t =
- let module C = Cic in
- let module S = CicSubstitution in
- if k = 0 && ens = [] then
- t
- else
- let rec unwind_aux m =
- function
- C.Rel n as t ->
- if n <= m then t else
- let d =
- try
- Some (RS.from_env (List.nth e (n-m-1)))
- with _ -> None
- in
- (match d with
- Some t' ->
- if m = 0 then t' else S.lift m t'
- | None -> C.Rel (n-k)
- )
- | C.Var (uri,exp_named_subst) ->
-(*
-prerr_endline ("%%%%%UWVAR " ^ String.concat " ; " (List.map (function (uri,t) -> UriManager.string_of_uri uri ^ " := " ^ CicPp.ppterm t) ens)) ;
-*)
- if List.exists (function (uri',_) -> UriManager.eq uri' uri) ens then
- CicSubstitution.lift m (RS.from_ens (List.assq uri ens))
- else
- let params =
- (match CicEnvironment.get_obj uri with
- C.Constant _ -> raise ReferenceToConstant
- | C.Variable (_,_,_,params) -> params
- | C.CurrentProof _ -> raise ReferenceToCurrentProof
- | C.InductiveDefinition _ -> raise ReferenceToInductiveDefinition
- )
- in
- let exp_named_subst' =
- substaux_in_exp_named_subst params exp_named_subst m
- in
- C.Var (uri,exp_named_subst')
- | C.Meta (i,l) ->
- let l' =
- List.map
- (function
- None -> None
- | Some t -> Some (unwind_aux m t)
- ) l
- in
- C.Meta (i, l')
- | C.Sort _ as t -> t
- | C.Implicit as t -> t
- | C.Cast (te,ty) -> C.Cast (unwind_aux m te, unwind_aux m ty) (*CSC ???*)
- | C.Prod (n,s,t) -> C.Prod (n, unwind_aux m s, unwind_aux (m + 1) t)
- | C.Lambda (n,s,t) -> C.Lambda (n, unwind_aux m s, unwind_aux (m + 1) t)
- | C.LetIn (n,s,t) -> C.LetIn (n, unwind_aux m s, unwind_aux (m + 1) t)
- | C.Appl l -> C.Appl (List.map (unwind_aux m) l)
- | C.Const (uri,exp_named_subst) ->
- let params =
- (match CicEnvironment.get_obj uri with
- C.Constant (_,_,_,params) -> params
- | C.Variable _ -> raise ReferenceToVariable
- | C.CurrentProof (_,_,_,_,params) -> params
- | C.InductiveDefinition _ -> raise ReferenceToInductiveDefinition
- )
- in
- let exp_named_subst' =
- substaux_in_exp_named_subst params exp_named_subst m
- in
- C.Const (uri,exp_named_subst')
- | C.MutInd (uri,i,exp_named_subst) ->
- let params =
- (match CicEnvironment.get_obj uri with
- C.Constant _ -> raise ReferenceToConstant
- | C.Variable _ -> raise ReferenceToVariable
- | C.CurrentProof _ -> raise ReferenceToCurrentProof
- | C.InductiveDefinition (_,params,_) -> params
- )
- in
- let exp_named_subst' =
- substaux_in_exp_named_subst params exp_named_subst m
- in
- C.MutInd (uri,i,exp_named_subst')
- | C.MutConstruct (uri,i,j,exp_named_subst) ->
- let params =
- (match CicEnvironment.get_obj uri with
- C.Constant _ -> raise ReferenceToConstant
- | C.Variable _ -> raise ReferenceToVariable
- | C.CurrentProof _ -> raise ReferenceToCurrentProof
- | C.InductiveDefinition (_,params,_) -> params
- )
- in
- let exp_named_subst' =
- substaux_in_exp_named_subst params exp_named_subst m
- in
- C.MutConstruct (uri,i,j,exp_named_subst')
- | C.MutCase (sp,i,outt,t,pl) ->
- C.MutCase (sp,i,unwind_aux m outt, unwind_aux m t,
- List.map (unwind_aux m) pl)
- | C.Fix (i,fl) ->
- let len = List.length fl in
- let substitutedfl =
- List.map
- (fun (name,i,ty,bo) ->
- (name, i, unwind_aux m ty, unwind_aux (m+len) bo))
- fl
- in
- C.Fix (i, substitutedfl)
- | C.CoFix (i,fl) ->
- let len = List.length fl in
- let substitutedfl =
- List.map
- (fun (name,ty,bo) -> (name, unwind_aux m ty, unwind_aux (m+len) bo))
- fl
- in
- C.CoFix (i, substitutedfl)
- and substaux_in_exp_named_subst params exp_named_subst' m =
- (*CSC: Idea di Andrea di ordinare compatibilmente con l'ordine dei params
- let ens' =
- List.map (function (uri,t) -> uri, unwind_aux m t) exp_named_subst' @
- (*CSC: qui liftiamo tutti gli ens anche se magari me ne servono la meta'!!! *)
- List.map (function (uri,t) -> uri, CicSubstitution.lift m t) ens
- in
- let rec filter_and_lift =
- function
- [] -> []
- | uri::tl ->
- let r = filter_and_lift tl in
- (try
- (uri,(List.assq uri ens'))::r
- with
- Not_found -> r
- )
- in
- filter_and_lift params
- *)
-
- (*CSC: invece di concatenare sarebbe meglio rispettare l'ordine dei params *)
- (*CSC: e' vero???? una veloce prova non sembra confermare la teoria *)
-
- (*CSC: codice copiato e modificato dalla cicSubstitution.subst_vars *)
- (*CSC: codice altamente inefficiente *)
- let rec filter_and_lift already_instantiated =
- function
- [] -> []
- | (uri,t)::tl when
- List.for_all
- (function (uri',_)-> not (UriManager.eq uri uri')) exp_named_subst'
- &&
- not (List.mem uri already_instantiated)
- &&
- List.mem uri params
- ->
- (uri,CicSubstitution.lift m (RS.from_ens t)) ::
- (filter_and_lift (uri::already_instantiated) tl)
- | _::tl -> filter_and_lift already_instantiated tl
-(*
- | (uri,_)::tl ->
-prerr_endline ("---- SKIPPO " ^ UriManager.string_of_uri uri) ;
-if List.for_all (function (uri',_) -> not (UriManager.eq uri uri')) exp_named_subst' then prerr_endline "---- OK1" ;
-prerr_endline ("++++ uri " ^ UriManager.string_of_uri uri ^ " not in " ^ String.concat " ; " (List.map UriManager.string_of_uri params)) ;
-if List.mem uri params then prerr_endline "---- OK2" ;
- filter_and_lift tl
-*)
- in
- List.map (function (uri,t) -> uri, unwind_aux m t) exp_named_subst' @
- (filter_and_lift [] (List.rev ens))
- in
- unwind_aux m t
- ;;
-
- let unwind =
- unwind' 0
- ;;
-
- let reduce context : config -> Cic.term =
- let module C = Cic in
- let module S = CicSubstitution in
- let rec reduce =
- function
- (k, e, _, (C.Rel n as t), s) ->
- let d =
- try
- Some (RS.from_env (List.nth e (n-1)))
- with
- _ ->
- try
- begin
- match List.nth context (n - 1 - k) with
- None -> assert false
- | Some (_,C.Decl _) -> None
- | Some (_,C.Def x) -> Some (S.lift (n - k) x)
- end
- with
- _ -> None
- in
- (match d with
- Some t' -> reduce (0,[],[],t',s)
- | None ->
- if s = [] then
- C.Rel (n-k)
- else C.Appl (C.Rel (n-k)::(RS.from_stack_list ~unwind s))
- )
- | (k, e, ens, (C.Var (uri,exp_named_subst) as t), s) ->
- if List.exists (function (uri',_) -> UriManager.eq uri' uri) ens then
- reduce (0, [], [], RS.from_ens (List.assq uri ens), s)
- else
- (match CicEnvironment.get_obj uri with
- C.Constant _ -> raise ReferenceToConstant
- | C.CurrentProof _ -> raise ReferenceToCurrentProof
- | C.InductiveDefinition _ -> raise ReferenceToInductiveDefinition
- | C.Variable (_,None,_,_) ->
- let t' = unwind k e ens t in
- if s = [] then t' else
- C.Appl (t'::(RS.from_stack_list ~unwind s))
- | C.Variable (_,Some body,_,_) ->
- let ens' = push_exp_named_subst k e ens exp_named_subst in
- reduce (0, [], ens', body, s)
- )
- | (k, e, ens, (C.Meta _ as t), s) ->
- let t' = unwind k e ens t in
- if s = [] then t' else C.Appl (t'::(RS.from_stack_list ~unwind s))
- | (k, e, _, (C.Sort _ as t), s) -> t (* s should be empty *)
- | (k, e, _, (C.Implicit as t), s) -> t (* s should be empty *)
- | (k, e, ens, (C.Cast (te,ty) as t), s) ->
- reduce (k, e, ens, te, s) (* s should be empty *)
- | (k, e, ens, (C.Prod _ as t), s) ->
- unwind k e ens t (* s should be empty *)
- | (k, e, ens, (C.Lambda (_,_,t) as t'), []) -> unwind k e ens t'
- | (k, e, ens, C.Lambda (_,_,t), p::s) ->
- reduce (k+1, (RS.stack_to_env ~reduce ~unwind p)::e, ens, t,s)
- | (k, e, ens, (C.LetIn (_,m,t) as t'), s) ->
- let m' = RS.compute_to_env ~reduce ~unwind k e ens m in
- reduce (k+1, m'::e, ens, t, s)
- | (_, _, _, C.Appl [], _) -> raise (Impossible 1)
- | (k, e, ens, C.Appl (he::tl), s) ->
- let tl' =
- List.map
- (function t -> RS.compute_to_stack ~reduce ~unwind k e ens t) tl
- in
- reduce (k, e, ens, he, (List.append tl') s)
- (* CSC: Old Dead Code
- | (k, e, ens, C.Appl ((C.Lambda _ as he)::tl), s)
- | (k, e, ens, C.Appl ((C.Const _ as he)::tl), s)
- | (k, e, ens, C.Appl ((C.MutCase _ as he)::tl), s)
- | (k, e, ens, C.Appl ((C.Fix _ as he)::tl), s) ->
- (* strict evaluation, but constants are NOT unfolded *)
- let red =
- function
- C.Const _ as t -> unwind k e ens t
- | t -> reduce (k,e,ens,t,[])
- in
- let tl' = List.map red tl in
- reduce (k, e, ens, he , List.append tl' s)
- | (k, e, ens, C.Appl l, s) ->
- C.Appl (List.append (List.map (unwind k e ens) l) s)
- *)
- | (k, e, ens, (C.Const (uri,exp_named_subst) as t), s) ->
- (match CicEnvironment.get_obj uri with
- C.Constant (_,Some body,_,_) ->
- let ens' = push_exp_named_subst k e ens exp_named_subst in
- (* constants are closed *)
- reduce (0, [], ens', body, s)
- | C.Constant (_,None,_,_) ->
- let t' = unwind k e ens t in
- if s = [] then t' else C.Appl (t'::(RS.from_stack_list ~unwind s))
- | C.Variable _ -> raise ReferenceToVariable
- | C.CurrentProof (_,_,body,_,_) ->
- let ens' = push_exp_named_subst k e ens exp_named_subst in
- (* constants are closed *)
- reduce (0, [], ens', body, s)
- | C.InductiveDefinition _ -> raise ReferenceToInductiveDefinition
- )
- | (k, e, ens, (C.MutInd _ as t),s) ->
- let t' = unwind k e ens t in
- if s = [] then t' else C.Appl (t'::(RS.from_stack_list ~unwind s))
- | (k, e, ens, (C.MutConstruct _ as t),s) ->
- let t' = unwind k e ens t in
- if s = [] then t' else C.Appl (t'::(RS.from_stack_list ~unwind s))
- | (k, e, ens, (C.MutCase (mutind,i,_,term,pl) as t),s) ->
- let decofix =
- function
- C.CoFix (i,fl) as t ->
- let (_,_,body) = List.nth fl i in
- let body' =
- let counter = ref (List.length fl) in
- List.fold_right
- (fun _ -> decr counter ; S.subst (C.CoFix (!counter,fl)))
- fl
- body
- in
- (* the term is the result of a reduction; *)
- (* so it is already unwinded. *)
- reduce (0,[],[],body',[])
- | C.Appl (C.CoFix (i,fl) :: tl) ->
- let (_,_,body) = List.nth fl i in
- let body' =
- let counter = ref (List.length fl) in
- List.fold_right
- (fun _ -> decr counter ; S.subst (C.CoFix (!counter,fl)))
- fl
- body
- in
- (* the term is the result of a reduction; *)
- (* so it is already unwinded. *)
- reduce (0,[],[],body',RS.to_stack_list tl)
- | t -> t
- in
- (match decofix (reduce (k,e,ens,term,[])) with
- C.MutConstruct (_,_,j,_) ->
- reduce (k, e, ens, (List.nth pl (j-1)), s)
- | C.Appl (C.MutConstruct (_,_,j,_) :: tl) ->
- let (arity, r) =
- match CicEnvironment.get_obj mutind with
- C.InductiveDefinition (tl,ingredients,r) ->
- let (_,_,arity,_) = List.nth tl i in
- (arity,r)
- | _ -> raise WrongUriToInductiveDefinition
- in
- let ts =
- let num_to_eat = r in
- let rec eat_first =
- function
- (0,l) -> l
- | (n,he::tl) when n > 0 -> eat_first (n - 1, tl)
- | _ -> raise (Impossible 5)
- in
- eat_first (num_to_eat,tl)
- in
- (* ts are already unwinded because they are a sublist of tl *)
- reduce (k, e, ens, (List.nth pl (j-1)), (RS.to_stack_list ts)@s)
- | C.Cast _ | C.Implicit ->
- raise (Impossible 2) (* we don't trust our whd ;-) *)
- | _ ->
- let t' = unwind k e ens t in
- if s = [] then t' else C.Appl (t'::(RS.from_stack_list ~unwind s))
- )
- | (k, e, ens, (C.Fix (i,fl) as t), s) ->
- let (_,recindex,_,body) = List.nth fl i in
- let recparam =
- try
- Some (RS.from_stack ~unwind (List.nth s recindex))
- with
- _ -> None
- in
- (match recparam with
- Some recparam ->
- (match reduce (0,[],[],recparam,[]) with
- (* match recparam with *)
- C.MutConstruct _
- | C.Appl ((C.MutConstruct _)::_) ->
- (* OLD
- let body' =
- let counter = ref (List.length fl) in
- List.fold_right
- (fun _ -> decr counter ; S.subst (C.Fix (!counter,fl)))
- fl
- body
- in
- reduce (k, e, ens, body', s) *)
- (* NEW *)
- let leng = List.length fl in
- let fl' =
- let unwind_fl (name,recindex,typ,body) =
- (name,recindex,unwind k e ens typ,
- unwind' leng k e ens body)
- in
- List.map unwind_fl fl
- in
- let new_env =
- let counter = ref 0 in
- let rec build_env e =
- if !counter = leng then e
- else
- (incr counter ;
- build_env ((RS.to_env (C.Fix (!counter -1, fl')))::e))
- in
- build_env e
- in
- reduce (k+leng, new_env, ens, body, s)
- | _ ->
- let t' = unwind k e ens t in
- if s = [] then t' else
- C.Appl (t'::(RS.from_stack_list ~unwind s))
- )
- | None ->
- let t' = unwind k e ens t in
- if s = [] then t' else
- C.Appl (t'::(RS.from_stack_list ~unwind s))
- )
- | (k, e, ens, (C.CoFix (i,fl) as t),s) ->
- let t' = unwind k e ens t in
- if s = [] then t' else C.Appl (t'::(RS.from_stack_list ~unwind s))
- and push_exp_named_subst k e ens =
- function
- [] -> ens
- | (uri,t)::tl ->
- push_exp_named_subst k e ((uri,RS.to_ens (unwind k e ens t))::ens) tl
- in
- reduce
- ;;
-
- let rec whd context t = reduce context (0, [], [], t, []);;
-
-(* DEBUGGING ONLY
-let whd context t =
- let res = whd context t in
- let rescsc = CicReductionNaif.whd context t in
- if not (CicReductionNaif.are_convertible context res rescsc) then
- begin
- prerr_endline ("PRIMA: " ^ CicPp.ppterm t) ;
- flush stderr ;
- prerr_endline ("DOPO: " ^ CicPp.ppterm res) ;
- flush stderr ;
- prerr_endline ("CSC: " ^ CicPp.ppterm rescsc) ;
- flush stderr ;
-CicReductionNaif.fdebug := 0 ;
-let _ = CicReductionNaif.are_convertible context res rescsc in
- assert false ;
- end
- else
- res
-;;
-*)
- end
-;;
-
-
-(*
-module R = Reduction CallByNameStrategy;;
-module R = Reduction CallByValueStrategy;;
-module R = Reduction CallByValueStrategyByNameOnConstants;;
-module R = Reduction LazyCallByValueStrategy;;
-module R = Reduction LazyCallByValueStrategyByNameOnConstants;;
-module R = Reduction LazyCallByNameStrategy;;
-module R = Reduction
- LazyCallByValueByNameOnConstantsWhenFromStack_ByNameStrategyWhenFromEnvOrEns;;
-module R = Reduction ClosuresOnStackByValueFromEnvOrEnsStrategy;;
-module R = Reduction
- ClosuresOnStackByValueFromEnvOrEnsByNameOnConstantsStrategy;;
-*)
-module R = Reduction ClosuresOnStackByValueFromEnvOrEnsStrategy;;
-
-let whd = R.whd;;
-
-(* t1, t2 must be well-typed *)
-let are_convertible =
- let module U = UriManager in
- let rec aux context t1 t2 =
- let aux2 t1 t2 =
- (* this trivial euristic cuts down the total time of about five times ;-) *)
- (* this because most of the time t1 and t2 are "sintactically" the same *)
- if t1 = t2 then
- true
- else
- begin
- let module C = Cic in
- match (t1,t2) with
- (C.Rel n1, C.Rel n2) -> n1 = n2
- | (C.Var (uri1,exp_named_subst1), C.Var (uri2,exp_named_subst2)) ->
- U.eq uri1 uri2 &&
- (try
- List.fold_right2
- (fun (uri1,x) (uri2,y) b ->
- U.eq uri1 uri2 && aux context x y && b
- ) exp_named_subst1 exp_named_subst2 true
- with
- Invalid_argument _ -> false
- )
- | (C.Meta (n1,l1), C.Meta (n2,l2)) ->
- n1 = n2 &&
- List.fold_left2
- (fun b t1 t2 ->
- b &&
- match t1,t2 with
- None,_
- | _,None -> true
- | Some t1',Some t2' -> aux context t1' t2'
- ) true l1 l2
- | (C.Sort s1, C.Sort s2) -> true (*CSC da finire con gli universi *)
- | (C.Prod (name1,s1,t1), C.Prod(_,s2,t2)) ->
- aux context s1 s2 && aux ((Some (name1, (C.Decl s1)))::context) t1 t2
- | (C.Lambda (name1,s1,t1), C.Lambda(_,s2,t2)) ->
- aux context s1 s2 && aux ((Some (name1, (C.Decl s1)))::context) t1 t2
- | (C.LetIn (name1,s1,t1), C.LetIn(_,s2,t2)) ->
- aux context s1 s2 && aux ((Some (name1, (C.Def s1)))::context) t1 t2
- | (C.Appl l1, C.Appl l2) ->
- (try
- List.fold_right2 (fun x y b -> aux context x y && b) l1 l2 true
- with
- Invalid_argument _ -> false
- )
- | (C.Const (uri1,exp_named_subst1), C.Const (uri2,exp_named_subst2)) ->
- U.eq uri1 uri2 &&
- (try
- List.fold_right2
- (fun (uri1,x) (uri2,y) b ->
- U.eq uri1 uri2 && aux context x y && b
- ) exp_named_subst1 exp_named_subst2 true
- with
- Invalid_argument _ -> false
- )
- | (C.MutInd (uri1,i1,exp_named_subst1),
- C.MutInd (uri2,i2,exp_named_subst2)
- ) ->
- U.eq uri1 uri2 && i1 = i2 &&
- (try
- List.fold_right2
- (fun (uri1,x) (uri2,y) b ->
- U.eq uri1 uri2 && aux context x y && b
- ) exp_named_subst1 exp_named_subst2 true
- with
- Invalid_argument _ -> false
- )
- | (C.MutConstruct (uri1,i1,j1,exp_named_subst1),
- C.MutConstruct (uri2,i2,j2,exp_named_subst2)
- ) ->
- U.eq uri1 uri2 && i1 = i2 && j1 = j2 &&
- (try
- List.fold_right2
- (fun (uri1,x) (uri2,y) b ->
- U.eq uri1 uri2 && aux context x y && b
- ) exp_named_subst1 exp_named_subst2 true
- with
- Invalid_argument _ -> false
- )
- | (C.MutCase (uri1,i1,outtype1,term1,pl1),
- C.MutCase (uri2,i2,outtype2,term2,pl2)) ->
- U.eq uri1 uri2 && i1 = i2 && aux context outtype1 outtype2 &&
- aux context term1 term2 &&
- List.fold_right2 (fun x y b -> b && aux context x y) pl1 pl2 true
- | (C.Fix (i1,fl1), C.Fix (i2,fl2)) ->
- let tys =
- List.map (function (n,_,ty,_) -> Some (C.Name n,(C.Decl ty))) fl1
- in
- i1 = i2 &&
- List.fold_right2
- (fun (_,recindex1,ty1,bo1) (_,recindex2,ty2,bo2) b ->
- b && recindex1 = recindex2 && aux context ty1 ty2 &&
- aux (tys@context) bo1 bo2)
- fl1 fl2 true
- | (C.CoFix (i1,fl1), C.CoFix (i2,fl2)) ->
- let tys =
- List.map (function (n,ty,_) -> Some (C.Name n,(C.Decl ty))) fl1
- in
- i1 = i2 &&
- List.fold_right2
- (fun (_,ty1,bo1) (_,ty2,bo2) b ->
- b && aux context ty1 ty2 && aux (tys@context) bo1 bo2)
- fl1 fl2 true
- | (C.Cast _, _) | (_, C.Cast _)
- | (C.Implicit, _) | (_, C.Implicit) ->
- raise (Impossible 3) (* we don't trust our whd ;-) *)
- | (_,_) -> false
- end
- in
- if aux2 t1 t2 then true
- else
- begin
- debug t1 [t2] "PREWHD";
- let t1' = whd context t1 in
- let t2' = whd context t2 in
- debug t1' [t2'] "POSTWHD";
- aux2 t1' t2'
- end
- in
- aux
-;;
projects / helm.git / blobdiff