open ProofEngineTypes
(* The default of term is the thesis of the goal to be prooved *)
-let reduction_tac ~reduction ~pattern:(what,hyp_patterns,goal_pattern)
+let reduction_tac ~reduction ~pattern
(proof,goal)
=
let curi,metasenv,pbo,pty = proof in
- let metano,context,ty = CicUtil.lookup_meta goal metasenv in
+ let (metano,context,ty) as conjecture = CicUtil.lookup_meta goal metasenv in
let replace where terms =
- let terms, terms' =
- List.split (List.map (fun (context, t) -> t, reduction context t) terms)
- in
- ProofEngineReduction.replace ~equality:(==) ~what:terms ~with_what:terms'
- ~where:where in
- let find_pattern_for name =
- try Some (snd(List.find (fun (n, pat) -> Cic.Name n = name) hyp_patterns))
- with Not_found -> None in
- let ty' =
- let terms =
- ProofEngineHelpers.select ~context ~term:ty ~pattern:(what,goal_pattern)
- in
- replace ty terms in
- let context_len = List.length context in
- let context' =
- if hyp_patterns <> [] then
- List.fold_right
- (fun entry context ->
- match entry with
- None -> None::context
- | Some (name,Cic.Decl term) ->
- (match find_pattern_for name with
- | None -> entry::context
- | Some pat ->
- try
- let what =
- match what with
- None -> None
- | Some what ->
- let what,subst',metasenv' =
- CicMetaSubst.delift_rels [] metasenv
- (context_len - List.length context) what
- in
- assert (subst' = []);
- assert (metasenv' = metasenv);
- Some what in
- let terms =
- ProofEngineHelpers.select ~context ~term ~pattern:(what,pat) in
- let term' = replace term terms in
- Some (name,Cic.Decl term') :: context
- with
- CicMetaSubst.DeliftingARelWouldCaptureAFreeVariable ->
- raise
- (ProofEngineTypes.Fail
- ("The term the user wants to convert is not closed " ^
- "in the context of the position of the substitution.")))
- | Some (name,Cic.Def (term, ty)) ->
- (match find_pattern_for name with
- | None -> entry::context
- | Some pat ->
- try
- let what =
- match what with
- None -> None
- | Some what ->
- let what,subst',metasenv' =
- CicMetaSubst.delift_rels [] metasenv
- (context_len - List.length context) what
- in
- assert (subst' = []);
- assert (metasenv' = metasenv);
- Some what in
- let terms =
- ProofEngineHelpers.select ~context ~term ~pattern:(what,pat) in
- let term' = replace term terms in
- let ty' =
- match ty with
- None -> None
- | Some ty ->
- let terms =
- ProofEngineHelpers.select
- ~context ~term:ty ~pattern:(what,pat)
- in
- Some (replace ty terms)
- in
- Some (name,Cic.Def (term',ty')) :: context
- with
- CicMetaSubst.DeliftingARelWouldCaptureAFreeVariable ->
- raise
- (ProofEngineTypes.Fail
- ("The term the user wants to convert is not closed " ^
- "in the context of the position of the substitution.")))
- ) context []
+ if terms = [] then where
else
- context
- in
+ let terms, terms' =
+ List.split (List.map (fun (context, t) -> t, reduction context t) terms)
+ in
+ ProofEngineReduction.replace ~equality:(==) ~what:terms ~with_what:terms'
+ ~where:where in
+ let (selected_context,selected_ty) =
+ ProofEngineHelpers.select ~metasenv ~conjecture ~pattern in
+ let ty' = replace ty selected_ty in
+ let context' =
+ List.fold_right2
+ (fun entry selected_entry context' ->
+ match entry,selected_entry with
+ None,None -> None::context'
+ | Some (name,Cic.Decl ty),Some (`Decl selected_ty) ->
+ let ty' = replace ty selected_ty in
+ Some (name,Cic.Decl ty')::context'
+ | Some (name,Cic.Def (bo,ty)),Some (`Def (selected_bo,selected_ty)) ->
+ let bo' = replace bo selected_bo in
+ let ty' =
+ match ty,selected_ty with
+ None,None -> None
+ | Some ty,Some selected_ty -> Some (replace ty selected_ty)
+ | _,_ -> assert false
+ in
+ Some (name,Cic.Def (bo',ty'))::context'
+ | _,_ -> assert false
+ ) context selected_context [] in
let metasenv' =
List.map (function
| (n,_,_) when n = metano -> (metano,context',ty')