let clearbody ~hyp =
let clearbody ~hyp (proof, goal) =
let module C = Cic in
- match hyp with
- None -> assert false
- | Some (_, C.Def (_, Some _)) -> assert false
- | Some (_, C.Decl _) -> raise (Fail "No Body To Clear")
- | Some (n_to_clear_body, C.Def (term,None)) as hyp_to_clear_body ->
- let curi,metasenv,pbo,pty = proof in
- let metano,_,_ = CicUtil.lookup_meta goal metasenv in
- let string_of_name =
- function
- C.Name n -> n
- | C.Anonymous -> "_"
- in
- let metasenv' =
- List.map
- (function
- (m,canonical_context,ty) when m = metano ->
- let canonical_context' =
- List.fold_right
- (fun entry context ->
- match entry with
- t when t == hyp_to_clear_body ->
- let cleared_entry =
- let ty,_ =
- CicTypeChecker.type_of_aux' metasenv context term
- CicUniv.empty_ugraph (* TASSI: FIXME *)
- in
- Some (n_to_clear_body, Cic.Decl ty)
- in
- cleared_entry::context
- | None -> None::context
- | Some (n,C.Decl t)
- | Some (n,C.Def (t,None)) ->
- let _,_ =
- try
- CicTypeChecker.type_of_aux' metasenv context t
- CicUniv.empty_ugraph (* TASSI: FIXME *)
- with
- _ ->
- raise
- (Fail
- ("The correctness of hypothesis " ^
- string_of_name n ^
- " relies on the body of " ^
- string_of_name n_to_clear_body)
- )
- in
- entry::context
- | Some (_,Cic.Def (_,Some _)) -> assert false
- ) canonical_context []
- in
- let _,_ =
- try
- CicTypeChecker.type_of_aux' metasenv canonical_context' ty
- CicUniv.empty_ugraph (* TASSI: FIXME *)
- with
- _ ->
- raise
- (Fail
- ("The correctness of the goal relies on the body of " ^
- string_of_name n_to_clear_body))
- in
- m,canonical_context',ty
- | t -> t
- ) metasenv
- in
- (curi,metasenv',pbo,pty), [goal]
+ let curi,metasenv,pbo,pty = proof in
+ let metano,_,_ = CicUtil.lookup_meta goal metasenv in
+ let string_of_name =
+ function
+ C.Name n -> n
+ | C.Anonymous -> "_"
+ in
+ let metasenv' =
+ List.map
+ (function
+ (m,canonical_context,ty) when m = metano ->
+ let canonical_context' =
+ List.fold_right
+ (fun entry context ->
+ match entry with
+ Some (C.Name hyp',C.Def (term,ty)) when hyp = hyp' ->
+ let cleared_entry =
+ let ty =
+ match ty with
+ Some ty -> ty
+ | None ->
+ fst
+ (CicTypeChecker.type_of_aux' metasenv context term
+ CicUniv.empty_ugraph) (* TASSI: FIXME *)
+ in
+ Some (C.Name hyp, Cic.Decl ty)
+ in
+ cleared_entry::context
+ | None -> None::context
+ | Some (n,C.Decl t)
+ | Some (n,C.Def (t,None)) ->
+ let _,_ =
+ try
+ CicTypeChecker.type_of_aux' metasenv context t
+ CicUniv.empty_ugraph (* TASSI: FIXME *)
+ with
+ _ ->
+ raise
+ (Fail
+ (lazy ("The correctness of hypothesis " ^
+ string_of_name n ^
+ " relies on the body of " ^ hyp)
+ ))
+ in
+ entry::context
+ | Some (_,Cic.Def (_,Some _)) -> assert false
+ ) canonical_context []
+ in
+ let _,_ =
+ try
+ CicTypeChecker.type_of_aux' metasenv canonical_context' ty
+ CicUniv.empty_ugraph (* TASSI: FIXME *)
+ with
+ _ ->
+ raise
+ (Fail
+ (lazy ("The correctness of the goal relies on the body of " ^
+ hyp)))
+ in
+ m,canonical_context',ty
+ | t -> t
+ ) metasenv
+ in
+ (curi,metasenv',pbo,pty), [goal]
in
mk_tactic (clearbody ~hyp)
let clear ~hyp =
- let clear ~hyp:hyp_to_clear (proof, goal) =
+ let clear ~hyp (proof, goal) =
let module C = Cic in
- match hyp_to_clear with
- None -> assert false
- | Some (n_to_clear, _) ->
- let curi,metasenv,pbo,pty = proof in
- let metano,context,ty =
- CicUtil.lookup_meta goal metasenv
- in
- let string_of_name =
- function
- C.Name n -> n
- | C.Anonymous -> "_"
- in
- let metasenv' =
- List.map
- (function
- (m,canonical_context,ty) when m = metano ->
- let canonical_context' =
- List.fold_right
- (fun entry context ->
- match entry with
- t when t == hyp_to_clear -> None::context
- | None -> None::context
- | Some (_,Cic.Def (_,Some _)) -> assert false
- | Some (n,C.Decl t)
- | Some (n,C.Def (t,None)) ->
+ let curi,metasenv,pbo,pty = proof in
+ let metano,context,ty =
+ CicUtil.lookup_meta goal metasenv
+ in
+ let string_of_name =
+ function
+ C.Name n -> n
+ | C.Anonymous -> "_"
+ in
+ let metasenv' =
+ List.map
+ (function
+ (m,canonical_context,ty) when m = metano ->
+ let context_changed, canonical_context' =
+ List.fold_right
+ (fun entry (b, context) ->
+ match entry with
+ Some (Cic.Name hyp',_) when hyp' = hyp ->
+ (true, None::context)
+ | None -> (b, None::context)
+ | Some (n,C.Decl t)
+ | Some (n,Cic.Def (t,Some _))
+ | Some (n,C.Def (t,None)) ->
+ if b then
let _,_ =
try
CicTypeChecker.type_of_aux' metasenv context t
- CicUniv.empty_ugraph (* TASSI: FIXME *)
- with
- _ ->
- raise
- (Fail
- ("Hypothesis " ^
- string_of_name n ^
- " uses hypothesis " ^
- string_of_name n_to_clear)
- )
+ CicUniv.empty_ugraph
+ with _ ->
+ raise
+ (Fail
+ (lazy ("Hypothesis " ^ string_of_name n ^
+ " uses hypothesis " ^ hyp)))
in
- entry::context
- ) canonical_context []
- in
- let _,_ =
- try
- CicTypeChecker.type_of_aux' metasenv canonical_context' ty
- CicUniv.empty_ugraph (* TASSI: FIXME *)
- with
- _ ->
- raise
- (Fail
- ("Hypothesis " ^ string_of_name n_to_clear ^
- " occurs in the goal"))
- in
- m,canonical_context',ty
- | t -> t
- ) metasenv
- in
- (curi,metasenv',pbo,pty), [goal]
+ (b, entry::context)
+ else
+ (b, entry::context)
+ ) canonical_context (false, [])
+ in
+ if not context_changed then
+ raise (Fail (lazy ("Hypothesis " ^ hyp ^ " does not exist")));
+ let _,_ =
+ try
+ CicTypeChecker.type_of_aux' metasenv canonical_context' ty
+ CicUniv.empty_ugraph
+ with _ ->
+ raise (Fail (lazy ("Hypothesis " ^ hyp ^ " occurs in the goal")))
+ in
+ m,canonical_context',ty
+ | t -> t
+ ) metasenv
+ in
+ (curi,metasenv',pbo,pty), [goal]
in
mk_tactic (clear ~hyp)
+
+(* Warning: this tactic has no effect on the proof term.
+ It just changes the name of an hypothesis in the current sequent *)
+let rename ~from ~to_ =
+ let rename ~from ~to_ (proof, goal) =
+ let module C = Cic in
+ let curi,metasenv,pbo,pty = proof in
+ let metano,context,ty =
+ CicUtil.lookup_meta goal metasenv
+ in
+ let metasenv' =
+ List.map
+ (function
+ (m,canonical_context,ty) when m = metano ->
+ let canonical_context' =
+ List.map
+ (function
+ Some (Cic.Name hyp,decl_or_def) when hyp = from ->
+ Some (Cic.Name to_,decl_or_def)
+ | item -> item
+ ) canonical_context
+ in
+ m,canonical_context',ty
+ | t -> t
+ ) metasenv
+ in
+ (curi,metasenv',pbo,pty), [goal]
+ in
+ mk_tactic (rename ~from ~to_)
+
+let set_goal n =
+ ProofEngineTypes.mk_tactic
+ (fun (proof, goal) ->
+ let (_, metasenv, _, _) = proof in
+ if CicUtil.exists_meta n metasenv then
+ (proof, [n])
+ else
+ raise (ProofEngineTypes.Fail (lazy ("no such meta: " ^ string_of_int n))))
projects / helm.git / blobdiff