- let metano,context,ty = 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 []