Source file metasyntax.ml
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open Pp
open CErrors
open Util
open Names
open Constrexpr
open Constrexpr_ops
open Notation_term
open Notation_gram
open Notation_ops
open Ppextend
open Extend
open Libobject
open Constrintern
open Vernacexpr
open Libnames
open Notation
open Nameops
let cache_token (_,s) = CLexer.add_keyword s
let inToken : string -> obj =
declare_object @@ global_object_nodischarge "TOKEN"
~cache:cache_token
~subst:(Some Libobject.ident_subst_function)
let add_token_obj s = Lib.add_anonymous_leaf (inToken s)
let entry_buf = Buffer.create 64
let pr_entry e =
let () = Buffer.clear entry_buf in
let ft = Format.formatter_of_buffer entry_buf in
let () = Pcoq.Entry.print ft e in
str (Buffer.contents entry_buf)
let pr_registered_grammar name =
let gram = Pcoq.find_grammars_by_name name in
match gram with
| [] -> user_err Pp.(str "Unknown or unprintable grammar entry.")
| entries ->
let pr_one (Pcoq.AnyEntry e) =
str "Entry " ++ str (Pcoq.Entry.name e) ++ str " is" ++ fnl () ++
pr_entry e
in
prlist pr_one entries
let pr_grammar = function
| "constr" | "term" | "binder_constr" ->
str "Entry constr is" ++ fnl () ++
pr_entry Pcoq.Constr.constr ++
str "and lconstr is" ++ fnl () ++
pr_entry Pcoq.Constr.lconstr ++
str "where binder_constr is" ++ fnl () ++
pr_entry Pcoq.Constr.binder_constr ++
str "and term is" ++ fnl () ++
pr_entry Pcoq.Constr.term
| "pattern" ->
pr_entry Pcoq.Constr.pattern
| "vernac" ->
str "Entry vernac_control is" ++ fnl () ++
pr_entry Pvernac.Vernac_.vernac_control ++
str "Entry command is" ++ fnl () ++
pr_entry Pvernac.Vernac_.command ++
str "Entry syntax is" ++ fnl () ++
pr_entry Pvernac.Vernac_.syntax ++
str "Entry gallina is" ++ fnl () ++
pr_entry Pvernac.Vernac_.gallina ++
str "Entry gallina_ext is" ++ fnl () ++
pr_entry Pvernac.Vernac_.gallina_ext
| name -> pr_registered_grammar name
let pr_custom_grammar name = pr_registered_grammar ("custom:"^name)
let parse_format ({CAst.loc;v=str} : lstring) =
let len = String.length str in
let make_loc i j = Option.map (Loc.shift_loc (i+1) (j-len)) loc in
let push_token loc a = function
| (i,cur)::l -> (i,(loc,a)::cur)::l
| [] -> assert false in
let push_white i n l =
if Int.equal n 0 then l else push_token (make_loc i (i+n)) (UnpTerminal (String.make n ' ')) l in
let close_box start stop b = function
| (_,a)::(_::_ as l) -> push_token (make_loc start stop) (UnpBox (b,a)) l
| [a] -> user_err ?loc:(make_loc start stop) Pp.(str "Non terminated box in format.")
| [] -> assert false in
let close_quotation start i =
if i < len && str.[i] == '\'' then
if (Int.equal (i+1) len || str.[i+1] == ' ')
then i+1
else user_err ?loc:(make_loc (i+1) (i+1)) Pp.(str "Space expected after quoted expression.")
else
user_err ?loc:(make_loc start (i-1)) Pp.(str "Beginning of quoted expression expected to be ended by a quote.") in
let rec spaces n i =
if i < len && str.[i] == ' ' then spaces (n+1) (i+1)
else n in
let rec nonspaces quoted n i =
if i < len && str.[i] != ' ' then
if str.[i] == '\'' && quoted &&
(i+1 >= len || str.[i+1] == ' ')
then if Int.equal n 0 then user_err ?loc:(make_loc (i-1) i) Pp.(str "Empty quoted token.") else n
else nonspaces quoted (n+1) (i+1)
else
if quoted then user_err ?loc:(make_loc i i) Pp.(str "Spaces are not allowed in (quoted) symbols.")
else n in
let rec parse_non_format i =
let n = nonspaces false 0 i in
push_token (make_loc i (i+n-1)) (UnpTerminal (String.sub str i n)) (parse_token 1 (i+n))
and parse_quoted n k i =
if i < len then match str.[i] with
| '/' when i+1 < len && str.[i+1] == '/' ->
push_token (make_loc (i-n) (i+1)) (UnpCut PpFnl)
(parse_token 1 (close_quotation i (i+2)))
| '/' when i+1 < len ->
let p = spaces 0 (i+1) in
push_token (make_loc (i-n) (i+p)) (UnpCut (PpBrk (n,p)))
(parse_token 1 (close_quotation i (i+p+1)))
| c ->
push_white (i-n-1-k) n (match c with
| '[' ->
if i+1 < len then match str.[i+1] with
| 'h' when i+1 <= len && str.[i+2] == 'v' ->
(parse_box i (fun n -> PpHVB n) (i+3))
| 'v' ->
parse_box i (fun n -> PpVB n) (i+2)
| ' ' | '\'' ->
parse_box i (fun n -> PpHOVB n) (i+1)
| _ -> user_err ?loc:(make_loc i i) Pp.(str "\"v\", \"hv\", \" \" expected after \"[\" in format.")
else user_err ?loc:(make_loc i i) Pp.(str "\"v\", \"hv\" or \" \" expected after \"[\" in format.")
| ']' ->
((i,[]) :: parse_token 1 (close_quotation i (i+1)))
| c ->
let n = nonspaces true 0 i in
push_token (make_loc i (i+n-1)) (UnpTerminal (String.sub str (i-1) (n+2)))
(parse_token 1 (close_quotation i (i+n))))
else
if Int.equal n 0 then []
else user_err ?loc:(make_loc (len-n) len) Pp.(str "Ending spaces non part of a format annotation.")
and parse_box start box i =
let n = spaces 0 i in
close_box start (i+n-1) (box n) (parse_token 1 (close_quotation i (i+n)))
and parse_token k i =
let n = spaces 0 i in
let i = i+n in
if i < len then match str.[i] with
| '\'' when i+1 >= len || str.[i+1] == ' ' ->
push_white (i-n) (n-k) (push_token (make_loc i (i+1)) (UnpTerminal "'") (parse_token 1 (i+1)))
| '\'' ->
parse_quoted (n-k) k (i+1)
| _ ->
push_white (i-n) (n-k) (parse_non_format i)
else push_white (i-n) n [(len,[])]
in
if not (String.is_empty str) then
match parse_token 0 0 with
| [_,l] -> l
| (i,_)::_ -> user_err ?loc:(make_loc i i) Pp.(str "Box closed without being opened.")
| [] -> assert false
else
[]
let quote_notation_token x =
let n = String.length x in
let norm = CLexer.is_ident x in
if (n > 0 && norm) || (n > 2 && x.[0] == '\'') then "'"^x^"'"
else x
let is_numeral_in_constr entry symbs =
match entry, List.filter (function Break _ -> false | _ -> true) symbs with
| InConstrEntry, ([Terminal "-"; Terminal x] | [Terminal x]) ->
NumTok.Unsigned.parse_string x <> None
| _ ->
false
let analyze_notation_tokens ~onlyprint df =
let (recvars,mainvars,symbols as res) = decompose_raw_notation df in
(if not onlyprint then
match List.duplicates Id.equal (mainvars @ List.map snd recvars) with
| id :: _ ->
user_err ~hdr:"Metasyntax.get_notation_vars"
(str "Variable " ++ Id.print id ++ str " occurs more than once.")
| _ -> ());
res
let error_not_same_scope x y =
user_err ~hdr:"Metasyntax.error_not_name_scope"
(str "Variables " ++ Id.print x ++ str " and " ++ Id.print y ++ str " must be in the same scope.")
let pr_notation_entry = function
| InConstrEntry -> str "constr"
| InCustomEntry s -> str "custom " ++ str s
let precedence_of_position_and_level from_level = function
| NumLevel n, BorderProd (b,Some a) ->
(let open Gramlib.Gramext in
match a, b with
| RightA, Left -> LevelLt n
| RightA, Right -> LevelLe n
| LeftA, Left -> LevelLe n
| LeftA, Right -> LevelLt n
| NonA, _ -> LevelLt n), Some b
| NumLevel n, _ -> LevelLe n, None
| NextLevel, _ -> LevelLt from_level, None
| DefaultLevel, _ -> LevelSome, None
(** Computing precedences of subentries for parsing *)
let precedence_of_entry_type (from_custom,from_level) = function
| ETConstr (custom,_,x) when notation_entry_eq custom from_custom ->
fst (precedence_of_position_and_level from_level x)
| ETConstr (custom,_,(NumLevel n,_)) -> LevelLe n
| ETConstr (custom,_,(NextLevel,_)) ->
user_err (strbrk "\"next level\" is only for sub-expressions in the same entry as where the notation is (" ++
quote (pr_notation_entry custom) ++ strbrk " is different from " ++
quote (pr_notation_entry from_custom) ++ str ").")
| ETPattern (_,n) -> let n = match n with None -> 0 | Some n -> n in LevelLe n
| _ -> LevelSome
(** Computing precedences for future insertion of parentheses at
the time of printing using hard-wired constr levels *)
let unparsing_precedence_of_entry_type from_level = function
| ETConstr (InConstrEntry,_,x) ->
precedence_of_position_and_level from_level x
| ETConstr (custom,_,_) ->
LevelSome, None
| ETPattern (_,n) -> LevelLe (match n with Some n -> n | None -> 0), None
| _ -> LevelSome, None
let starts_with_left_bracket s =
let l = String.length s in not (Int.equal l 0) &&
(s.[0] == '{' || s.[0] == '[' || s.[0] == '(')
let ends_with_right_bracket s =
let l = String.length s in not (Int.equal l 0) &&
(s.[l-1] == '}' || s.[l-1] == ']' || s.[l-1] == ')')
let is_left_bracket s =
starts_with_left_bracket s && not (ends_with_right_bracket s)
let is_right_bracket s =
not (starts_with_left_bracket s) && ends_with_right_bracket s
let is_comma s =
let l = String.length s in not (Int.equal l 0) &&
(s.[0] == ',' || s.[0] == ';')
let is_operator s =
let l = String.length s in not (Int.equal l 0) &&
(s.[0] == '+' || s.[0] == '*' || s.[0] == '=' ||
s.[0] == '-' || s.[0] == '/' || s.[0] == '<' || s.[0] == '>' ||
s.[0] == '@' || s.[0] == '\\' || s.[0] == '&' || s.[0] == '~' || s.[0] == '$')
let is_non_terminal = function
| NonTerminal _ | SProdList _ -> true
| _ -> false
let is_next_non_terminal b = function
| [] -> b
| pr :: _ -> is_non_terminal pr
let is_next_terminal = function Terminal _ :: _ -> true | _ -> false
let is_next_break = function Break _ :: _ -> true | _ -> false
let add_break n l = (None,UnpCut (PpBrk(n,0))) :: l
let add_break_if_none n b = function
| (_,UnpCut (PpBrk _)) :: _ as l -> l
| [] when not b -> []
| l -> (None,UnpCut (PpBrk(n,0))) :: l
let check_open_binder isopen sl m =
let pr_token = function
| Terminal s -> str s
| Break n -> str "␣"
| _ -> assert false
in
if isopen && not (List.is_empty sl) then
user_err (str "as " ++ Id.print m ++
str " is a non-closed binder, no such \"" ++
prlist_with_sep spc pr_token sl
++ strbrk "\" is allowed to occur.")
let unparsing_metavar i from typs =
let x = List.nth typs (i-1) in
let prec,side = unparsing_precedence_of_entry_type from x in
match x with
| ETConstr _ | ETGlobal | ETBigint ->
UnpMetaVar (prec,side)
| ETPattern _ | ETName _ | ETIdent ->
UnpBinderMetaVar (prec,NotQuotedPattern)
| ETBinder isopen ->
UnpBinderMetaVar (prec,QuotedPattern)
let index_id id l = List.index Id.equal id l
let make_hunks etyps symbols from_level =
let vars,typs = List.split etyps in
let rec make b = function
| NonTerminal m :: prods ->
let i = index_id m vars in
let u = unparsing_metavar i from_level typs in
if is_next_non_terminal b prods then
(None, u) :: add_break_if_none 1 b (make b prods)
else
(None, u) :: make_with_space b prods
| Terminal s :: prods
when b || List.exists is_non_terminal prods ->
if (is_comma s || is_operator s) then
(None, UnpTerminal s) :: add_break_if_none 1 b (make b prods)
else if is_right_bracket s && is_next_terminal prods then
(None, UnpTerminal s) :: add_break_if_none 0 b (make b prods)
else if is_left_bracket s && is_next_non_terminal b prods then
(None, UnpTerminal s) :: make b prods
else if not (is_next_break prods) then
(None, UnpTerminal (s^" ")) :: make b prods
else
(None, UnpTerminal s) :: make b prods
| Terminal s :: prods ->
(match prods with
| Terminal _ :: _ -> (None,UnpTerminal (s^" ")) :: make b prods
| _ -> (None,UnpTerminal s) :: make b prods)
| Break n :: prods ->
add_break n (make b prods)
| SProdList (m,sl) :: prods ->
let i = index_id m vars in
let typ = List.nth typs (i-1) in
let prec,side = unparsing_precedence_of_entry_type from_level typ in
let sl' =
if List.is_empty sl then add_break 1 []
else make true sl in
let hunk = match typ with
| ETConstr _ -> UnpListMetaVar (prec,List.map snd sl',side)
| ETBinder isopen ->
check_open_binder isopen sl m;
UnpBinderListMetaVar (isopen,List.map snd sl')
| _ -> assert false in
(None, hunk) :: make_with_space b prods
| [] -> []
and make_with_space b prods =
match prods with
| Terminal s' :: prods'->
if is_operator s' then
(None,UnpTerminal (" "^s')) :: add_break_if_none 1 b (make b prods')
else if is_comma s' then
make b prods
else if is_right_bracket s' then
make b prods
else
add_break_if_none 1 b (make b prods)
| (NonTerminal _ | SProdList _) :: _ ->
add_break_if_none 1 b (make b prods)
| Break _ :: _ ->
make b prods
| [] -> []
in make false symbols
let error_format ?loc () = user_err ?loc Pp.(str "The format does not match the notation.")
let warn_format_break =
CWarnings.create ~name:"notation-both-format-and-spaces" ~category:"parsing"
(fun () ->
strbrk "Discarding format implicitly indicated by multiple spaces in notation because an explicit format modifier is given.")
let has_ldots l =
List.exists (function (_,UnpTerminal s) -> String.equal s (Id.to_string Notation_ops.ldots_var) | _ -> false) l
let rec split_format_at_ldots hd = function
| (loc,UnpTerminal s) :: fmt when String.equal s (Id.to_string Notation_ops.ldots_var) -> loc, List.rev hd, fmt
| u :: fmt ->
check_no_ldots_in_box u;
split_format_at_ldots (u::hd) fmt
| [] -> raise Exit
and check_no_ldots_in_box = function
| (_,UnpBox (_,fmt)) ->
(try
let loc,_,_ = split_format_at_ldots [] fmt in
user_err ?loc Pp.(str ("The special symbol \"..\" must occur at the same formatting depth than the variables of which it is the ellipse."))
with Exit -> ())
| _ -> ()
let error_not_same ?loc () =
user_err ?loc Pp.(str "The format is not the same on the right- and left-hand sides of the special token \"..\".")
let find_prod_list_loc sfmt fmt =
if List.is_empty sfmt then
Loc.merge_opt (fst (List.hd fmt)) (fst (List.hd (List.tl fmt)))
else
Loc.merge_opt (fst (List.hd sfmt)) (fst (List.last sfmt))
let is_blank s =
let n = String.length s in
let rec aux i s = i >= n || s.[i] = ' ' && aux (i+1) s in
aux 0 s
let is_formatting = function
| (_,UnpCut _) -> true
| (_,UnpTerminal s) -> is_blank s
| _ -> false
let rec is_var_in_recursive_format = function
| (_,UnpTerminal s) when not (is_blank s) -> true
| (loc,UnpBox (b,l)) ->
(match List.filter (fun a -> not (is_formatting a)) l with
| [a] -> is_var_in_recursive_format a
| _ -> error_not_same ?loc ())
| _ -> false
let rec check_eq_var_upto_name = function
| (_,UnpTerminal s1), (_,UnpTerminal s2) when not (is_blank s1 && is_blank s2) || s1 = s2 -> ()
| (_,UnpBox (b1,l1)), (_,UnpBox (b2,l2)) when b1 = b2 -> List.iter check_eq_var_upto_name (List.combine l1 l2)
| (_,UnpCut b1), (_,UnpCut b2) when b1 = b2 -> ()
| _, (loc,_) -> error_not_same ?loc ()
let skip_var_in_recursive_format = function
| a :: sl when is_var_in_recursive_format a -> a, sl
| (loc,_) :: _ -> error_not_same ?loc ()
| [] -> assert false
let read_recursive_format sl fmt =
let get_head fmt =
let var,sl = skip_var_in_recursive_format fmt in
try var, split_format_at_ldots [] sl
with Exit -> error_not_same ?loc:(fst (List.last (if sl = [] then fmt else sl))) () in
let rec get_tail = function
| (loc,a) :: sepfmt, (_,b) :: fmt when (=) a b -> get_tail (sepfmt, fmt)
| [], tail -> skip_var_in_recursive_format tail
| (loc,_) :: _, ([] | (_,UnpTerminal _) :: _)-> error_not_same ?loc ()
| _, (loc,_)::_ -> error_not_same ?loc () in
let var1, (loc, slfmt, fmt) = get_head fmt in
let var2, res = get_tail (slfmt, fmt) in
check_eq_var_upto_name (var1,var2);
slfmt, res
let hunks_of_format (from_level,(vars,typs)) symfmt =
let rec aux = function
| symbs, (_,(UnpTerminal s' as u)) :: fmt
when String.equal s' (String.make (String.length s') ' ') ->
let symbs, l = aux (symbs,fmt) in symbs, u :: l
| Terminal s :: symbs, (_,UnpTerminal s') :: fmt
when String.equal s (String.drop_simple_quotes s') ->
let symbs, l = aux (symbs,fmt) in symbs, UnpTerminal s :: l
| NonTerminal s :: symbs, (_,UnpTerminal s') :: fmt when Id.equal s (Id.of_string s') ->
let i = index_id s vars in
let symbs, l = aux (symbs,fmt) in symbs, unparsing_metavar i from_level typs :: l
| symbs, (_,(UnpCut _ as u)) :: fmt ->
let symbs, l = aux (symbs,fmt) in symbs, u :: l
| SProdList (m,sl) :: symbs, fmt when has_ldots fmt ->
let i = index_id m vars in
let typ = List.nth typs (i-1) in
let prec,side = unparsing_precedence_of_entry_type from_level typ in
let loc_slfmt,rfmt = read_recursive_format sl fmt in
let sl, slfmt = aux (sl,loc_slfmt) in
if not (List.is_empty sl) then error_format ?loc:(find_prod_list_loc loc_slfmt fmt) ();
let symbs, l = aux (symbs,rfmt) in
let hunk = match typ with
| ETConstr _ -> UnpListMetaVar (prec,slfmt,side)
| ETBinder isopen ->
check_open_binder isopen sl m;
UnpBinderListMetaVar (isopen,slfmt)
| _ -> assert false in
symbs, hunk :: l
| symbs, (_,UnpBox (a,b)) :: fmt ->
let symbs', b' = aux (symbs,b) in
let symbs', l = aux (symbs',fmt) in
symbs', UnpBox (a,List.map (fun x -> (None,x)) b') :: l
| symbs, [] -> symbs, []
| Break _ :: symbs, fmt -> warn_format_break (); aux (symbs,fmt)
| _, fmt -> error_format ?loc:(fst (List.hd fmt)) ()
in
match aux symfmt with
| [], l -> l
| _ -> error_format ()
let assoc_of_type from n (_,typ) = precedence_of_entry_type (from,n) typ
let is_not_small_constr = function
ETProdConstr _ -> true
| _ -> false
let rec define_keywords_aux = function
| GramConstrNonTerminal(e,Some _) as n1 :: GramConstrTerminal(Tok.PIDENT (Some k)) :: l
when is_not_small_constr e ->
Flags.if_verbose Feedback.msg_info (str "Identifier '" ++ str k ++ str "' now a keyword");
CLexer.add_keyword k;
n1 :: GramConstrTerminal(Tok.PKEYWORD k) :: define_keywords_aux l
| n :: l -> n :: define_keywords_aux l
| [] -> []
let define_keywords = function
| GramConstrTerminal(Tok.PIDENT (Some k))::l ->
Flags.if_verbose Feedback.msg_info (str "Identifier '" ++ str k ++ str "' now a keyword");
CLexer.add_keyword k;
GramConstrTerminal(Tok.PKEYWORD k) :: define_keywords_aux l
| l -> define_keywords_aux l
let distribute a ll = List.map (fun l -> a @ l) ll
let expand_list_rule s typ tkl x n p ll =
let camlp5_message_name = Some (add_suffix x ("_"^string_of_int n)) in
let main = GramConstrNonTerminal (ETProdConstr (s,typ), camlp5_message_name) in
let tks = List.map (fun x -> GramConstrTerminal x) tkl in
let rec aux i hds ll =
if i < p then aux (i+1) (main :: tks @ hds) ll
else if Int.equal i (p+n) then
let hds =
GramConstrListMark (p+n,true,p) :: hds
@ [GramConstrNonTerminal (ETProdConstrList (s, typ,tkl), Some x)] in
distribute hds ll
else
distribute (GramConstrListMark (i+1,false,p) :: hds @ [main]) ll @
aux (i+1) (main :: tks @ hds) ll in
aux 0 [] ll
let is_constr_typ (s,lev) x etyps =
match List.assoc x etyps with
| ETConstr (s',_,(lev',InternalProd | (NumLevel _ | NextLevel as lev'), _)) ->
Notation.notation_entry_eq s s' && production_level_eq lev lev'
| _ -> false
let include_possible_similar_trailing_pattern typ etyps sl l =
let rec aux n = function
| Terminal s :: sl, Terminal s'::l' when s = s' -> aux n (sl,l')
| [], NonTerminal x ::l' when is_constr_typ typ x etyps -> try_aux n l'
| Break _ :: sl, l -> aux n (sl,l)
| sl, Break _ :: l -> aux n (sl,l)
| _ -> raise Exit
and try_aux n l =
try aux (n+1) (sl,l)
with Exit -> n,l in
try_aux 0 l
let prod_entry_type = function
| ETIdent -> ETProdIdent
| ETName _ -> ETProdName
| ETGlobal -> ETProdReference
| ETBigint -> ETProdBigint
| ETBinder o -> ETProdOneBinder o
| ETConstr (s,_,p) -> ETProdConstr (s,p)
| ETPattern (_,n) -> ETProdPattern (match n with None -> 0 | Some n -> n)
let make_production etyps symbols =
let rec aux = function
| [] -> [[]]
| NonTerminal m :: l ->
let typ = List.assoc m etyps in
distribute [GramConstrNonTerminal (prod_entry_type typ, Some m)] (aux l)
| Terminal s :: l ->
distribute [GramConstrTerminal (CLexer.terminal s)] (aux l)
| Break _ :: l ->
aux l
| SProdList (x,sl) :: l ->
let tkl = List.flatten
(List.map (function Terminal s -> [CLexer.terminal s]
| Break _ -> []
| _ -> anomaly (Pp.str "Found a non terminal token in recursive notation separator.")) sl) in
match List.assoc x etyps with
| ETConstr (s,_,(lev,_ as typ)) ->
let p,l' = include_possible_similar_trailing_pattern (s,lev) etyps sl l in
expand_list_rule s typ tkl x 1 p (aux l')
| ETBinder o ->
check_open_binder o sl x;
let typ = if o then (assert (tkl = []); ETBinderOpen) else ETBinderClosed tkl in
distribute
[GramConstrNonTerminal (ETProdBinderList typ, Some x)] (aux l)
| _ ->
user_err Pp.(str "Components of recursive patterns in notation must be terms or binders.") in
let prods = aux symbols in
List.map define_keywords prods
let rec find_symbols c_current c_next c_last = function
| [] -> []
| NonTerminal id :: sl ->
let prec = if not (List.is_empty sl) then c_current else c_last in
(id, prec) :: (find_symbols c_next c_next c_last sl)
| Terminal s :: sl -> find_symbols c_next c_next c_last sl
| Break n :: sl -> find_symbols c_current c_next c_last sl
| SProdList (x,_) :: sl' ->
(x,c_next)::(find_symbols c_next c_next c_last sl')
let border = function
| (_,(ETConstr(_,_,(_,BorderProd (_,a))))) :: _ -> a
| _ -> None
let recompute_assoc typs = let open Gramlib.Gramext in
match border typs, border (List.rev typs) with
| Some LeftA, Some RightA -> assert false
| Some LeftA, _ -> Some LeftA
| _, Some RightA -> Some RightA
| _ -> None
let pr_arg_level from (lev,typ) =
let pplev = function
| LevelLt n when Int.equal n from -> spc () ++ str "at next level"
| LevelLe n -> spc () ++ str "at level " ++ int n
| LevelLt n -> spc () ++ str "at level below " ++ int n
| LevelSome -> mt () in
Ppvernac.pr_set_entry_type (fun _ -> mt()) typ ++ pplev lev
let pr_level ntn (from,fromlevel,args) typs =
(match from with InConstrEntry -> mt () | InCustomEntry s -> str "in " ++ str s ++ spc()) ++
str "at level " ++ int fromlevel ++ spc () ++ str "with arguments" ++ spc() ++
prlist_with_sep pr_comma (pr_arg_level fromlevel) (List.combine args typs)
let error_incompatible_level ntn oldprec oldtyps prec typs =
user_err
(str "Notation " ++ pr_notation ntn ++ str " is already defined" ++ spc() ++
pr_level ntn oldprec oldtyps ++
spc() ++ str "while it is now required to be" ++ spc() ++
pr_level ntn prec typs ++ str ".")
let error_parsing_incompatible_level ntn ntn' oldprec oldtyps prec typs =
user_err
(str "Notation " ++ pr_notation ntn ++ str " relies on a parsing rule for " ++ pr_notation ntn' ++ spc() ++
str " which is already defined" ++ spc() ++
pr_level ntn oldprec oldtyps ++
spc() ++ str "while it is now required to be" ++ spc() ++
pr_level ntn prec typs ++ str ".")
let warn_incompatible_format =
CWarnings.create ~name:"notation-incompatible-format" ~category:"parsing"
(fun (specific,ntn) ->
let head,scope = match specific with
| None -> str "Notation", mt ()
| Some LastLonelyNotation -> str "Lonely notation", mt ()
| Some (NotationInScope sc) -> str "Notation", strbrk (" in scope " ^ sc) in
head ++ spc () ++ pr_notation ntn ++
strbrk " was already defined with a different format" ++ scope ++ str ".")
type syntax_parsing_extension = {
synext_level : Notation.level;
synext_notation : notation;
synext_notgram : notation_grammar option;
synext_nottyps : Extend.constr_entry_key list;
}
type syntax_printing_extension = {
synext_reserved : bool;
synext_unparsing : unparsing_rule;
synext_extra : (string * string) list;
}
let generic_format_to_declare ntn {synext_unparsing = (rules,_); synext_extra = } =
try
let (generic_rules,_),reserved, =
Ppextend.find_generic_notation_printing_rule ntn in
if reserved &&
(not (List.for_all2eq unparsing_eq rules generic_rules)
|| extra_rules <> generic_extra_rules)
then
(warn_incompatible_format (None,ntn); true)
else
false
with Not_found -> true
let check_reserved_format ntn = function
| None -> ()
| Some sy_pp_rules -> let _ = generic_format_to_declare ntn sy_pp_rules in ()
let specific_format_to_declare (specific,ntn as specific_ntn)
{synext_unparsing = (rules,_); synext_extra = } =
try
let (specific_rules,_), =
Ppextend.find_specific_notation_printing_rule specific_ntn in
if not (List.for_all2eq unparsing_eq rules specific_rules)
|| extra_rules <> specific_extra_rules then
(warn_incompatible_format (Some specific,ntn); true)
else false
with Not_found -> true
type syntax_extension_obj =
locality_flag * (syntax_parsing_extension * syntax_printing_extension option)
let check_and_extend_constr_grammar ntn rule =
try
let ntn_for_grammar = rule.notgram_notation in
if notation_eq ntn ntn_for_grammar then raise Not_found;
let prec = rule.notgram_level in
let typs = rule.notgram_typs in
let oldprec = Notation.level_of_notation ntn_for_grammar in
let oldparsing =
try
Some (Notgram_ops.grammar_of_notation ntn_for_grammar)
with Not_found -> None
in
let oldtyps = Notgram_ops.subentries_of_notation ntn_for_grammar in
if not (Notation.level_eq prec oldprec) && oldparsing <> None then
error_parsing_incompatible_level ntn ntn_for_grammar oldprec oldtyps prec typs;
if oldparsing = None then raise Not_found
with Not_found ->
Egramcoq.extend_constr_grammar rule
let cache_one_syntax_extension (pa_se,pp_se) =
let ntn = pa_se.synext_notation in
let prec = pa_se.synext_level in
let oldparsing =
try
let oldprec = Notation.level_of_notation ntn in
let oldparsing =
try
Some (Notgram_ops.grammar_of_notation ntn)
with Not_found -> None
in
let oldtyps = Notgram_ops.subentries_of_notation ntn in
if not (Notation.level_eq prec oldprec) && (oldparsing <> None || pa_se.synext_notgram = None) then
error_incompatible_level ntn oldprec oldtyps prec pa_se.synext_nottyps;
oldparsing
with Not_found ->
let () = Notation.declare_notation_level ntn prec in
let () = Notgram_ops.declare_notation_subentries ntn pa_se.synext_nottyps in
let () = Option.iter (Notgram_ops.declare_notation_grammar ntn) pa_se.synext_notgram in
None in
begin match oldparsing, pa_se.synext_notgram with
| None, Some grams -> List.iter (check_and_extend_constr_grammar ntn) grams
| _ -> ()
end;
match pp_se with
| None -> ()
| Some pp_se ->
if generic_format_to_declare ntn pp_se then
declare_generic_notation_printing_rules ntn
~extra:pp_se.synext_extra ~reserved:pp_se.synext_reserved pp_se.synext_unparsing
let cache_syntax_extension (_, (_, sy)) =
cache_one_syntax_extension sy
let subst_parsing_rule subst x = x
let subst_printing_rule subst x = x
let subst_syntax_extension (subst, (local, (pa_sy,pp_sy))) =
(local, ({ pa_sy with
synext_notgram = Option.map (List.map (subst_parsing_rule subst)) pa_sy.synext_notgram },
Option.map (fun pp_sy -> {pp_sy with synext_unparsing = subst_printing_rule subst pp_sy.synext_unparsing}) pp_sy)
)
let classify_syntax_definition (local, _ as o) =
if local then Dispose else Substitute o
let open_syntax_extension i o =
if Int.equal i 1 then cache_syntax_extension o
let inSyntaxExtension : syntax_extension_obj -> obj =
declare_object {(default_object "SYNTAX-EXTENSION") with
open_function = simple_open open_syntax_extension;
cache_function = cache_syntax_extension;
subst_function = subst_syntax_extension;
classify_function = classify_syntax_definition}
module SyndefMods = struct
type t = {
only_parsing : bool;
scopes : (Id.t * scope_name) list;
}
let default = {
only_parsing = false;
scopes = [];
}
end
let interp_syndef_modifiers modl = let open SyndefMods in
let rec interp skipped acc = function
| [] -> List.rev skipped, acc
| SetOnlyParsing :: l ->
interp skipped { acc with only_parsing = true; } l
| SetItemScope([],_) :: l ->
interp skipped acc l
| SetItemScope(s::ids,k) :: l ->
let scopes = acc.scopes in
let id = Id.of_string s in
if List.mem_assoc id scopes then
user_err (str "Notation scope for argument " ++ str s ++
str " can be specified only once.");
interp skipped { acc with scopes = (id,k) :: scopes }
(SetItemScope(ids,s) :: l)
| x :: l ->
interp (x :: skipped) acc l
in
interp [] default modl
module NotationMods = struct
type notation_modifier = {
assoc : Gramlib.Gramext.g_assoc option;
level : int option;
custom : notation_entry;
etyps : (Id.t * simple_constr_prod_entry_key) list;
subtyps : (Id.t * production_level) list;
only_printing : bool;
format : lstring option;
extra : (string * string) list;
}
let default = {
assoc = None;
level = None;
custom = InConstrEntry;
etyps = [];
subtyps = [];
only_printing = false;
format = None;
extra = [];
}
end
let warn_deprecated_ident_entry =
CWarnings.create ~name:"deprecated-ident-entry" ~category:"deprecated"
(fun () -> strbrk "grammar entry \"ident\" permitted \"_\" in addition to proper identifiers; this use is deprecated and its meaning will change in the future; use \"name\" instead.")
let interp_modifiers modl = let open NotationMods in
let rec interp subtyps acc = function
| [] -> subtyps, acc
| SetEntryType (s,typ) :: l ->
let id = Id.of_string s in
if Id.List.mem_assoc id acc.etyps then
user_err ~hdr:"Metasyntax.interp_modifiers"
(str s ++ str " is already assigned to an entry or constr level.");
interp subtyps { acc with etyps = (id,typ) :: acc.etyps; } l
| SetItemLevel ([],bko,n) :: l ->
interp subtyps acc l
| SetItemLevel (s::idl,bko,n) :: l ->
let id = Id.of_string s in
if Id.List.mem_assoc id acc.etyps then
user_err ~hdr:"Metasyntax.interp_modifiers"
(str s ++ str " is already assigned to an entry or constr level.");
interp ((id,bko,n)::subtyps) acc (SetItemLevel (idl,bko,n)::l)
| SetLevel n :: l ->
(match acc.custom with
| InCustomEntry s ->
if acc.level <> None then
user_err (str ("isolated \"at level " ^ string_of_int n ^ "\" unexpected."))
else
user_err (str ("use \"in custom " ^ s ^ " at level " ^ string_of_int n ^
"\"") ++ spc () ++ str "rather than" ++ spc () ++
str ("\"at level " ^ string_of_int n ^ "\"") ++
spc () ++ str "isolated.")
| InConstrEntry ->
if acc.level <> None then
user_err (str "A level is already assigned.");
interp subtyps { acc with level = Some n; } l)
| SetCustomEntry (s,n) :: l ->
if acc.level <> None then
(if n = None then
user_err (str ("use \"in custom " ^ s ^ " at level " ^
string_of_int (Option.get acc.level) ^
"\"") ++ spc () ++ str "rather than" ++ spc () ++
str ("\"at level " ^
string_of_int (Option.get acc.level) ^ "\"") ++
spc () ++ str "isolated.")
else
user_err (str ("isolated \"at level " ^ string_of_int (Option.get acc.level) ^ "\" unexpected.")));
if acc.custom <> InConstrEntry then
user_err (str "Entry is already assigned to custom " ++ str s ++ (match acc.level with None -> mt () | Some lev -> str " at level " ++ int lev) ++ str ".");
interp subtyps { acc with custom = InCustomEntry s; level = n } l
| SetAssoc a :: l ->
if not (Option.is_empty acc.assoc) then user_err Pp.(str "An associativity is given more than once.");
interp subtyps { acc with assoc = Some a; } l
| SetOnlyPrinting :: l ->
interp subtyps { acc with only_printing = true; } l
| SetFormat ("text",s) :: l ->
if not (Option.is_empty acc.format) then user_err Pp.(str "A format is given more than once.");
interp subtyps { acc with format = Some s; } l
| SetFormat (k,s) :: l ->
interp subtyps { acc with extra = (k,s.CAst.v)::acc.extra; } l
| (SetOnlyParsing | SetItemScope _) :: _ -> assert false
in
let modl, syndef_mods = interp_syndef_modifiers modl in
let subtyps, mods = interp [] default modl in
let = List.map (fun (id,bko,n) -> (id,ETConstr (mods.custom,bko,n))) subtyps in
let mods =
{ mods with etyps = List.map (function
| (id,ETName false) ->
if mods.custom = InConstrEntry then (warn_deprecated_ident_entry (); (id,ETName true))
else (id,ETIdent)
| x -> x) mods.etyps } in
syndef_mods, { mods with etyps = extra_etyps@mods.etyps }
let check_infix_modifiers modifiers =
let _, mods = interp_modifiers modifiers in
let t = mods.NotationMods.etyps in
let u = mods.NotationMods.subtyps in
if not (List.is_empty t) || not (List.is_empty u) then
user_err Pp.(str "Explicit entry level or type unexpected in infix notation.")
let check_useless_entry_types recvars mainvars etyps =
let vars = let (l1,l2) = List.split recvars in l1@l2@mainvars in
match List.filter (fun (x,etyp) -> not (List.mem x vars)) etyps with
| (x,_)::_ -> user_err ~hdr:"Metasyntax.check_useless_entry_types"
(Id.print x ++ str " is unbound in the notation.")
| _ -> ()
let interp_non_syntax_modifiers mods =
let set modif (only_parsing,only_printing,entry) = match modif with
| SetOnlyParsing -> Some (true,only_printing,entry)
| SetOnlyPrinting -> Some (only_parsing,true,entry)
| SetCustomEntry(entry,None) -> Some (only_parsing,only_printing,InCustomEntry entry)
| _ -> None
in
List.fold_left (fun st modif -> Option.bind st @@ set modif) (Some (false,false,InConstrEntry)) mods
let has_no_binders_type =
List.for_all (fun (_,(_,typ)) ->
match typ with
| NtnTypeBinder _ | NtnTypeBinderList -> false
| NtnTypeConstr | NtnTypeConstrList -> true)
let set_entry_type from n etyps (x,typ) =
let make_lev n s = match typ with
| BorderProd _ -> NumLevel n
| InternalProd -> DefaultLevel in
let typ = try
match List.assoc x etyps, typ with
| ETConstr (s,bko,DefaultLevel), _ ->
if notation_entry_eq from s then ETConstr (s,bko,(make_lev n s,typ))
else ETConstr (s,bko,(DefaultLevel,typ))
| ETConstr (s,bko,n), BorderProd (left,_) ->
ETConstr (s,bko,(n,BorderProd (left,None)))
| ETConstr (s,bko,n), InternalProd ->
ETConstr (s,bko,(n,InternalProd))
| ETPattern (b,n), _ -> ETPattern (b,n)
| (ETIdent | ETName _ | ETBigint | ETGlobal | ETBinder _ as x), _ -> x
with Not_found ->
ETConstr (from,None,(make_lev n from,typ))
in (x,typ)
let join_auxiliary_recursive_types recvars etyps =
List.fold_right (fun (x,y) typs ->
let xtyp = try Some (List.assoc x etyps) with Not_found -> None in
let ytyp = try Some (List.assoc y etyps) with Not_found -> None in
match xtyp,ytyp with
| None, None -> typs
| Some _, None -> typs
| None, Some ytyp -> (x,ytyp)::typs
| Some xtyp, Some ytyp when (=) xtyp ytyp -> typs
| Some xtyp, Some ytyp ->
user_err
(strbrk "In " ++ Id.print x ++ str " .. " ++ Id.print y ++
strbrk ", both ends have incompatible types."))
recvars etyps
let internalization_type_of_entry_type = function
| ETBinder _ -> NtnInternTypeOnlyBinder
| ETConstr _ | ETBigint | ETGlobal
| ETIdent | ETName _ | ETPattern _ -> NtnInternTypeAny None
let set_internalization_type typs =
List.map (fun (_, e) -> internalization_type_of_entry_type e) typs
let make_internalization_vars recvars mainvars typs =
let maintyps = List.combine mainvars typs in
let = List.map (fun (x,y) -> (y,List.assoc x maintyps)) recvars in
maintyps @ extratyps
let make_interpretation_type isrec isonlybinding default_if_binding = function
| ETConstr (_,None,_) when isrec -> NtnTypeConstrList
| ETConstr (_,Some bk,_) -> NtnTypeBinder (NtnBinderParsedAsConstr bk)
| ETConstr (_,None,_) when isonlybinding -> NtnTypeBinder (NtnBinderParsedAsConstr default_if_binding)
| ETConstr (_,None,_) -> NtnTypeConstr
| ETIdent -> NtnTypeBinder NtnParsedAsIdent
| ETName _ -> NtnTypeBinder NtnParsedAsName
| ETPattern (ppstrict,_) -> NtnTypeBinder (NtnParsedAsPattern ppstrict)
| ETBigint | ETGlobal -> NtnTypeConstr
| ETBinder _ ->
if isrec then NtnTypeBinderList
else NtnTypeBinder NtnParsedAsBinder
let subentry_of_constr_prod_entry from_level = function
| ETConstr (InCustomEntry s,_,x) ->
let n = match fst (precedence_of_position_and_level from_level x) with
| LevelLt n -> n-1
| LevelLe n -> n
| LevelSome -> max_int in
InCustomEntryLevel (s,n)
| ETConstr (InConstrEntry,_,_) -> InConstrEntrySomeLevel
| _ -> InConstrEntrySomeLevel
let make_interpretation_vars
?(default_if_binding=AsName)
recvars level allvars typs =
let eq_subscope (sc1, l1) (sc2, l2) =
Option.equal String.equal sc1 sc2 &&
List.equal String.equal l1 l2
in
let check (x, y) =
let (_,scope1) = Id.Map.find x allvars in
let (_,scope2) = Id.Map.find y allvars in
if not (eq_subscope scope1 scope2) then error_not_same_scope x y
in
let () = List.iter check recvars in
let useless_recvars = List.map snd recvars in
let mainvars =
Id.Map.filter (fun x _ -> not (Id.List.mem x useless_recvars)) allvars in
Id.Map.mapi (fun x (isonlybinding, sc) ->
let typ = Id.List.assoc x typs in
((subentry_of_constr_prod_entry level typ,sc),
make_interpretation_type (Id.List.mem_assoc x recvars) isonlybinding default_if_binding typ)) mainvars
let check_rule_productivity l =
if List.for_all (function NonTerminal _ | Break _ -> true | _ -> false) l then
user_err Pp.(str "A notation must include at least one symbol.");
if (match l with SProdList _ :: _ -> true | _ -> false) then
user_err Pp.(str "A recursive notation must start with at least one symbol.")
let warn_notation_bound_to_variable =
CWarnings.create ~name:"notation-bound-to-variable" ~category:"parsing"
(fun () ->
strbrk "This notation will not be used for printing as it is bound to a single variable.")
let warn_non_reversible_notation =
CWarnings.create ~name:"non-reversible-notation" ~category:"parsing"
(function
| APrioriReversible -> assert false
| HasLtac ->
strbrk "This notation contains Ltac expressions: it will not be used for printing."
| NonInjective ids ->
let n = List.length ids in
strbrk (String.plural n "Variable") ++ spc () ++ pr_enum Id.print ids ++ spc () ++
strbrk (if n > 1 then "do" else "does") ++
str " not occur in the right-hand side." ++ spc() ++
strbrk "The notation will not be used for printing as it is not reversible.")
let is_coercion level typs =
match level, typs with
| Some (custom,n,_), [e] ->
(match e, custom with
| ETConstr _, _ ->
let customkey = make_notation_entry_level custom n in
let subentry = subentry_of_constr_prod_entry n e in
if notation_entry_level_eq subentry customkey then None
else Some (IsEntryCoercion subentry)
| ETGlobal, InCustomEntry s -> Some (IsEntryGlobal (s,n))
| ETIdent, InCustomEntry s -> Some (IsEntryIdent (s,n))
| _ -> None)
| Some _, _ -> assert false
| None, _ -> None
let printability level typs onlyparse reversibility = function
| NVar _ when reversibility = APrioriReversible ->
let coe = is_coercion level typs in
if not onlyparse && coe = None then
warn_notation_bound_to_variable ();
true, coe
| _ ->
(if not onlyparse && reversibility <> APrioriReversible then
(warn_non_reversible_notation reversibility; true)
else onlyparse),None
let find_precedence custom lev etyps symbols onlyprint =
let first_symbol =
let rec aux = function
| Break _ :: t -> aux t
| h :: t -> Some h
| [] -> None in
aux symbols in
let last_is_terminal () =
let rec aux b = function
| Break _ :: t -> aux b t
| Terminal _ :: t -> aux true t
| _ :: t -> aux false t
| [] -> b in
aux false symbols in
match first_symbol with
| None -> [],0
| Some (NonTerminal x) ->
let test () =
if onlyprint then
if Option.is_empty lev then
user_err Pp.(str "Explicit level needed in only-printing mode when the level of the leftmost non-terminal is given.")
else [],Option.get lev
else
user_err Pp.(str "The level of the leftmost non-terminal cannot be changed.") in
(try match List.assoc x etyps, custom with
| ETConstr (s,_,(NumLevel _ | NextLevel)), s' when s = s' -> test ()
| (ETIdent | ETName _ | ETBigint | ETGlobal), _ ->
begin match lev with
| None ->
([fun () -> Flags.if_verbose (Feedback.msg_info ?loc:None) (strbrk "Setting notation at level 0.")],0)
| Some 0 ->
([],0)
| _ ->
user_err Pp.(str "A notation starting with an atomic expression must be at level 0.")
end
| (ETPattern _ | ETBinder _), InConstrEntry when not onlyprint ->
user_err Pp.(str "Binders or patterns not supported in leftmost position.")
| (ETPattern _ | ETBinder _ | ETConstr _), _ ->
if Option.is_empty lev then
user_err Pp.(str "Need an explicit level.")
else [],Option.get lev
with Not_found ->
if Option.is_empty lev then
user_err Pp.(str "A left-recursive notation must have an explicit level.")
else [],Option.get lev)
| Some (Terminal _) when last_is_terminal () ->
if Option.is_empty lev then
([fun () -> Flags.if_verbose (Feedback.msg_info ?loc:None) (strbrk "Setting notation at level 0.")], 0)
else [],Option.get lev
| Some _ ->
if Option.is_empty lev then user_err Pp.(str "Cannot determine the level.");
[],Option.get lev
let check_curly_brackets_notation_exists () =
try let _ = Notation.level_of_notation (InConstrEntry,"{ _ }") in ()
with Not_found ->
user_err Pp.(str "Notations involving patterns of the form \"{ _ }\" are treated \n\
specially and require that the notation \"{ _ }\" is already reserved.")
let remove_curly_brackets l =
let rec skip_break acc = function
| Break _ as br :: l -> skip_break (br::acc) l
| l -> List.rev acc, l in
let rec aux deb = function
| [] -> []
| Terminal "{" as t1 :: l ->
let br,next = skip_break [] l in
(match next with
| NonTerminal _ as x :: l' ->
let br',next' = skip_break [] l' in
(match next' with
| Terminal "}" as t2 :: l'' ->
if deb && List.is_empty l'' then [t1;x;t2] else begin
check_curly_brackets_notation_exists ();
x :: aux false l''
end
| l1 -> t1 :: br @ x :: br' @ aux false l1)
| l0 -> t1 :: aux false l0)
| x :: l -> x :: aux false l
in aux true l
module SynData = struct
type subentry_types = (Id.t * constr_entry_key) list
type syn_data = {
info : notation * notation_location;
only_parsing : bool;
only_printing : bool;
deprecation : Deprecation.t option;
format : lstring option;
extra : (string * string) list;
msgs : (unit -> unit) list;
recvars : (Id.t * Id.t) list;
mainvars : Id.List.elt list;
intern_typs : notation_var_internalization_type list;
level : level;
subentries : constr_entry_key list;
pa_syntax_data : subentry_types * symbol list;
pp_syntax_data : subentry_types * symbol list;
not_data : notation *
level *
constr_entry_key list *
bool;
}
end
let find_subentry_types from n assoc etyps symbols =
let typs =
find_symbols
(BorderProd(Left,assoc))
(InternalProd)
(BorderProd(Right,assoc))
symbols in
let sy_typs = List.map (set_entry_type from n etyps) typs in
let prec = List.map (assoc_of_type from n) sy_typs in
sy_typs, prec
let check_locality_compatibility local custom i_typs =
if not local then
let subcustom = List.map_filter (function _,ETConstr (InCustomEntry s,_,_) -> Some s | _ -> None) i_typs in
let allcustoms = match custom with InCustomEntry s -> s::subcustom | _ -> subcustom in
List.iter (fun s ->
if Egramcoq.locality_of_custom_entry s then
user_err (strbrk "Notation has to be declared local as it depends on custom entry " ++ str s ++
strbrk " which is local."))
(List.uniquize allcustoms)
let compute_syntax_data ~local deprecation df modifiers =
let open SynData in
let open SyndefMods in
let open NotationMods in
let syndef_mods, mods = interp_modifiers modifiers in
let only_printing = mods.only_printing in
let only_parsing = syndef_mods.only_parsing in
if only_printing && only_parsing then user_err (str "A notation cannot be both 'only printing' and 'only parsing'.");
if syndef_mods.scopes <> [] then user_err (str "General notations don't support 'in scope'.");
let assoc = Option.append mods.assoc (Some Gramlib.Gramext.NonA) in
let (recvars,mainvars,symbols) = analyze_notation_tokens ~onlyprint:only_printing df in
let _ = check_useless_entry_types recvars mainvars mods.etyps in
let msgs,n = find_precedence mods.custom mods.level mods.etyps symbols only_printing in
let ntn_for_interp = make_notation_key mods.custom symbols in
let symbols_for_grammar =
if mods.custom = InConstrEntry then remove_curly_brackets symbols else symbols in
let need_squash = not (List.equal Notation.symbol_eq symbols symbols_for_grammar) in
let ntn_for_grammar = if need_squash then make_notation_key mods.custom symbols_for_grammar else ntn_for_interp in
if mods.custom = InConstrEntry && not only_printing then check_rule_productivity symbols_for_grammar;
let etyps = join_auxiliary_recursive_types recvars mods.etyps in
let sy_typs, prec =
find_subentry_types mods.custom n assoc etyps symbols in
let sy_typs_for_grammar, prec_for_grammar =
if need_squash then
find_subentry_types mods.custom n assoc etyps symbols_for_grammar
else
sy_typs, prec in
let i_typs = set_internalization_type sy_typs in
check_locality_compatibility local mods.custom sy_typs;
let pa_sy_data = (sy_typs_for_grammar,symbols_for_grammar) in
let pp_sy_data = (sy_typs,symbols) in
let sy_fulldata = (ntn_for_grammar,(mods.custom,n,prec_for_grammar),List.map snd sy_typs_for_grammar,need_squash) in
let df' = ((Lib.library_dp(),Lib.current_dirpath true),df) in
let i_data = ntn_for_interp, df' in
{ info = i_data;
only_parsing;
only_printing;
deprecation;
format = mods.format;
extra = mods.extra;
msgs;
recvars;
mainvars;
intern_typs = i_typs;
level = (mods.custom,n,prec);
subentries = List.map snd sy_typs;
pa_syntax_data = pa_sy_data;
pp_syntax_data = pp_sy_data;
not_data = sy_fulldata;
}
let warn_only_parsing_reserved_notation =
CWarnings.create ~name:"irrelevant-reserved-notation-only-parsing" ~category:"parsing"
(fun () -> strbrk "The only parsing modifier has no effect in Reserved Notation.")
let compute_pure_syntax_data ~local df mods =
let open SynData in
let sd = compute_syntax_data ~local None df mods in
if sd.only_parsing
then
let msgs = (fun () -> warn_only_parsing_reserved_notation ?loc:None ())::sd.msgs in
{ sd with msgs; only_parsing = false }
else
sd
type notation_obj = {
notobj_local : bool;
notobj_scope : scope_name option;
notobj_interp : interpretation;
notobj_coercion : entry_coercion_kind option;
notobj_use : notation_use option;
notobj_deprecation : Deprecation.t option;
notobj_notation : notation * notation_location;
notobj_specific_pp_rules : syntax_printing_extension option;
notobj_also_in_cases_pattern : bool;
}
let load_notation_common silently_define_scope_if_undefined _ (_, nobj) =
if silently_define_scope_if_undefined then
Option.iter Notation.declare_scope nobj.notobj_scope
else
Option.iter Notation.ensure_scope nobj.notobj_scope
let load_notation =
load_notation_common true
let open_notation i (_, nobj) =
if Int.equal i 1 then begin
let scope = nobj.notobj_scope in
let (ntn, df) = nobj.notobj_notation in
let pat = nobj.notobj_interp in
let deprecation = nobj.notobj_deprecation in
let scope = match scope with None -> LastLonelyNotation | Some sc -> NotationInScope sc in
let also_in_cases_pattern = nobj.notobj_also_in_cases_pattern in
(match nobj.notobj_use with
| Some use -> Notation.declare_notation (scope,ntn) pat df ~use ~also_in_cases_pattern nobj.notobj_coercion deprecation
| None -> ());
(match nobj.notobj_specific_pp_rules with
| Some pp_sy ->
if specific_format_to_declare (scope,ntn) pp_sy then
Ppextend.declare_specific_notation_printing_rules
(scope,ntn) ~extra:pp_sy.synext_extra pp_sy.synext_unparsing
| None -> ())
end
let cache_notation o =
load_notation_common false 1 o;
open_notation 1 o
let subst_notation (subst, nobj) =
{ nobj with notobj_interp = subst_interpretation subst nobj.notobj_interp; }
let classify_notation nobj =
if nobj.notobj_local then Dispose else Substitute nobj
let inNotation : notation_obj -> obj =
declare_object {(default_object "NOTATION") with
open_function = simple_open open_notation;
cache_function = cache_notation;
subst_function = subst_notation;
load_function = load_notation;
classify_function = classify_notation}
let with_lib_stk_protection f x =
let fs = Lib.freeze () in
try let a = f x in Lib.unfreeze fs; a
with reraise ->
let reraise = Exninfo.capture reraise in
let () = Lib.unfreeze fs in
Exninfo.iraise reraise
let with_syntax_protection f x =
with_lib_stk_protection
(Pcoq.with_grammar_rule_protection
(with_notation_protection f)) x
exception NoSyntaxRule
let recover_notation_syntax ntn =
let pa =
try
let prec = Notation.level_of_notation ntn in
let pa_typs = Notgram_ops.subentries_of_notation ntn in
let pa_rule = try Some (Notgram_ops.grammar_of_notation ntn) with Not_found -> None in
{ synext_level = prec;
synext_notation = ntn;
synext_notgram = pa_rule;
synext_nottyps = pa_typs;
}
with Not_found ->
raise NoSyntaxRule in
let pp =
try
let pp_rule,reserved, = find_generic_notation_printing_rule ntn in
Some {
synext_reserved = reserved;
synext_unparsing = pp_rule;
synext_extra = pp_extra_rules;
}
with Not_found -> None in
pa,pp
let recover_squash_syntax sy =
let sq,_ = recover_notation_syntax (InConstrEntry,"{ _ }") in
match sq.synext_notgram with
| Some gram -> sy :: gram
| None -> raise NoSyntaxRule
let make_pa_rule level entries (typs,symbols) ntn need_squash =
let assoc = recompute_assoc typs in
let prod = make_production typs symbols in
let sy = {
notgram_level = level;
notgram_assoc = assoc;
notgram_notation = ntn;
notgram_prods = prod;
notgram_typs = entries;
} in
if need_squash then recover_squash_syntax sy else [sy]
let make_pp_rule level (typs,symbols) fmt =
match fmt with
| None ->
let hunks = make_hunks typs symbols level in
if List.exists (function _,(UnpCut (PpBrk _) | UnpListMetaVar _) -> true | _ -> false) hunks then
[UnpBox (PpHOVB 0,hunks)]
else
List.map snd hunks
| Some fmt ->
hunks_of_format (level, List.split typs) (symbols, parse_format fmt)
let make_parsing_rules (sd : SynData.syn_data) = let open SynData in
let ntn_for_grammar, prec_for_grammar, typs_for_grammar, need_squash = sd.not_data in
let pa_rule =
if sd.only_printing then None
else Some (make_pa_rule prec_for_grammar typs_for_grammar sd.pa_syntax_data ntn_for_grammar need_squash)
in {
synext_level = sd.level;
synext_notation = fst sd.info;
synext_notgram = pa_rule;
synext_nottyps = typs_for_grammar;
}
let warn_irrelevant_format =
CWarnings.create ~name:"irrelevant-format-only-parsing" ~category:"parsing"
(fun () -> str "The format modifier is irrelevant for only parsing rules.")
let make_printing_rules reserved (sd : SynData.syn_data) = let open SynData in
let custom,level,_ = sd.level in
let format =
if sd.only_parsing && sd.format <> None then (warn_irrelevant_format (); None)
else sd.format in
let pp_rule = make_pp_rule level sd.pp_syntax_data format in
Some {
synext_reserved = reserved;
synext_unparsing = (pp_rule,level);
synext_extra = sd.extra;
}
let warn_unused_interpretation =
CWarnings.create ~name:"unused-notation" ~category:"parsing"
(fun b ->
strbrk "interpretation is used neither for printing nor for parsing, " ++
(if b then strbrk "the declaration could be replaced by \"Reserved Notation\"."
else strbrk "the declaration could be removed."))
let make_use reserved onlyparse onlyprint =
match onlyparse, onlyprint with
| false, false -> Some ParsingAndPrinting
| true, false -> Some OnlyParsing
| false, true -> Some OnlyPrinting
| true, true -> warn_unused_interpretation reserved; None
let to_map l =
let fold accu (x, v) = Id.Map.add x v accu in
List.fold_left fold Id.Map.empty l
let add_notation_in_scope ~local deprecation df env c mods scope =
let open SynData in
let sd = compute_syntax_data ~local deprecation df mods in
let sy_pa_rules = make_parsing_rules sd in
let sy_pp_rules, gen_sy_pp_rules =
match sd.only_parsing, Ppextend.has_generic_notation_printing_rule (fst sd.info) with
| true, true -> None, None
| onlyparse, has_generic ->
let rules = make_printing_rules false sd in
let _ = check_reserved_format (fst sd.info) rules in
(if onlyparse then None else rules),
(if has_generic then None else rules) in
let i_vars = make_internalization_vars sd.recvars sd.mainvars sd.intern_typs in
let nenv = {
ninterp_var_type = to_map i_vars;
ninterp_rec_vars = to_map sd.recvars;
} in
let (acvars, ac, reversibility) = interp_notation_constr env nenv c in
let interp = make_interpretation_vars sd.recvars (pi2 sd.level) acvars (fst sd.pa_syntax_data) in
let map (x, _) = try Some (x, Id.Map.find x interp) with Not_found -> None in
let vars = List.map_filter map i_vars in
let also_in_cases_pattern = has_no_binders_type vars in
let onlyparse,coe = printability (Some sd.level) sd.subentries sd.only_parsing reversibility ac in
let notation, location = sd.info in
let use = make_use true onlyparse sd.only_printing in
let notation = {
notobj_local = local;
notobj_scope = scope;
notobj_use = use;
notobj_interp = (vars, ac);
notobj_coercion = coe;
notobj_deprecation = sd.deprecation;
notobj_notation = (notation, location);
notobj_specific_pp_rules = sy_pp_rules;
notobj_also_in_cases_pattern = also_in_cases_pattern;
} in
List.iter (fun f -> f ()) sd.msgs;
Lib.add_anonymous_leaf (inSyntaxExtension (local, (sy_pa_rules,gen_sy_pp_rules)));
Lib.add_anonymous_leaf (inNotation notation);
sd.info
let add_notation_interpretation_core ~local df env ?(impls=empty_internalization_env) entry c scope onlyparse onlyprint deprecation =
let (recvars,mainvars,symbs) = analyze_notation_tokens ~onlyprint df in
let notation_key = make_notation_key entry symbs in
let level, i_typs, onlyprint, pp_sy = if not (is_numeral_in_constr entry symbs) then begin
let (pa_sy,pp_sy as sy) = recover_notation_syntax notation_key in
let () = Lib.add_anonymous_leaf (inSyntaxExtension (local,sy)) in
let onlyprint = onlyprint || pa_sy.synext_notgram = None in
let typs = pa_sy.synext_nottyps in
Some pa_sy.synext_level, typs, onlyprint, pp_sy
end else None, [], false, None in
let path = (Lib.library_dp(), Lib.current_dirpath true) in
let df' = notation_key, (path,df) in
let i_vars = make_internalization_vars recvars mainvars (List.map internalization_type_of_entry_type i_typs) in
let nenv = {
ninterp_var_type = to_map i_vars;
ninterp_rec_vars = to_map recvars;
} in
let (acvars, ac, reversibility) = interp_notation_constr env ~impls nenv c in
let plevel = match level with Some (from,level,l) -> level | None -> 0 in
let interp = make_interpretation_vars recvars plevel acvars (List.combine mainvars i_typs) in
let map (x, _) = try Some (x, Id.Map.find x interp) with Not_found -> None in
let vars = List.map_filter map i_vars in
let also_in_cases_pattern = has_no_binders_type vars in
let onlyparse,coe = printability level i_typs onlyparse reversibility ac in
let use = make_use false onlyparse onlyprint in
let notation = {
notobj_local = local;
notobj_scope = scope;
notobj_use = use;
notobj_interp = (vars, ac);
notobj_coercion = coe;
notobj_deprecation = deprecation;
notobj_notation = df';
notobj_specific_pp_rules = pp_sy;
notobj_also_in_cases_pattern = also_in_cases_pattern;
} in
Lib.add_anonymous_leaf (inNotation notation);
df'
let add_syntax_extension ~local ({CAst.loc;v=df},mods) = let open SynData in
let psd = {(compute_pure_syntax_data ~local df mods) with deprecation = None} in
let pa_rules = make_parsing_rules psd in
let pp_rules = make_printing_rules true psd in
List.iter (fun f -> f ()) psd.msgs;
Lib.add_anonymous_leaf (inSyntaxExtension(local,(pa_rules,pp_rules)))
let add_notation_interpretation env decl_ntn =
let
{ decl_ntn_string = { CAst.loc ; v = df };
decl_ntn_interp = c;
decl_ntn_modifiers = modifiers;
decl_ntn_scope = sc;
} = decl_ntn in
match interp_non_syntax_modifiers modifiers with
| None -> CErrors.user_err (str"Only modifiers not affecting parsing are supported here.")
| Some (only_parsing,only_printing,entry) ->
let df' = add_notation_interpretation_core ~local:false df env entry c sc only_parsing false None in
Dumpglob.dump_notation (loc,df') sc true
let set_notation_for_interpretation env impls decl_ntn =
let
{ decl_ntn_string = { CAst.v = df };
decl_ntn_interp = c;
decl_ntn_modifiers = modifiers;
decl_ntn_scope = sc;
} = decl_ntn in
match interp_non_syntax_modifiers modifiers with
| None -> CErrors.user_err (str"Only modifiers not affecting parsing are supported here")
| Some (only_parsing,only_printing,entry) ->
(try ignore
(Flags.silently (fun () -> add_notation_interpretation_core ~local:false df env ~impls entry c sc only_parsing false None) ());
with NoSyntaxRule ->
user_err Pp.(str "Parsing rule for this notation has to be previously declared."));
Option.iter (fun sc -> Notation.open_close_scope (false,true,sc)) sc
let add_notation ~local deprecation env c ({CAst.loc;v=df},modifiers) sc =
let df' =
match interp_non_syntax_modifiers modifiers with
| Some (only_parsing,only_printing,entry) ->
begin try add_notation_interpretation_core ~local df env entry c sc only_parsing only_printing deprecation
with NoSyntaxRule ->
add_notation_in_scope ~local deprecation df env c modifiers sc
end
| None ->
add_notation_in_scope ~local deprecation df env c modifiers sc
in
Dumpglob.dump_notation (loc,df') sc true
let df k v =
let notk =
let _,_, symbs = analyze_notation_tokens ~onlyprint:true df in
make_notation_key InConstrEntry symbs in
add_notation_extra_printing_rule notk k v
let inject_var x = CAst.make @@ CRef (qualid_of_ident x,None)
let add_infix ~local deprecation env ({CAst.loc;v=inf},modifiers) pr sc =
check_infix_modifiers modifiers;
let vars = names_of_constr_expr pr in
let x = Namegen.next_ident_away (Id.of_string "x") vars in
let y = Namegen.next_ident_away (Id.of_string "y") (Id.Set.add x vars) in
let metas = [inject_var x; inject_var y] in
let c = mkAppC (pr,metas) in
let df = CAst.make ?loc @@ Id.to_string x ^" "^(quote_notation_token inf)^" "^Id.to_string y in
add_notation ~local deprecation env c (df,modifiers) sc
type scope_command =
| ScopeDeclare
| ScopeDelimAdd of string
| ScopeDelimRemove
| ScopeClasses of scope_class list
let load_scope_command_common silently_define_scope_if_undefined _ (_,(local,scope,o)) =
let declare_scope_if_needed =
if silently_define_scope_if_undefined then Notation.declare_scope
else Notation.ensure_scope in
match o with
| ScopeDeclare -> Notation.declare_scope scope
| ScopeDelimAdd dlm -> declare_scope_if_needed scope
| ScopeDelimRemove -> declare_scope_if_needed scope
| ScopeClasses cl -> declare_scope_if_needed scope
let load_scope_command =
load_scope_command_common true
let open_scope_command i (_,(local,scope,o)) =
if Int.equal i 1 then
match o with
| ScopeDeclare -> ()
| ScopeDelimAdd dlm -> Notation.declare_delimiters scope dlm
| ScopeDelimRemove -> Notation.remove_delimiters scope
| ScopeClasses cl -> List.iter (Notation.declare_scope_class scope) cl
let cache_scope_command o =
load_scope_command_common false 1 o;
open_scope_command 1 o
let subst_scope_command (subst,(local,scope,o as x)) = match o with
| ScopeClasses cl ->
let env = Global.env () in
let cl' = List.map_filter (subst_scope_class env subst) cl in
let cl' =
if List.for_all2eq (==) cl cl' then cl
else cl' in
local, scope, ScopeClasses cl'
| _ -> x
let classify_scope_command (local, _, _ as o) =
if local then Dispose else Substitute o
let inScopeCommand : locality_flag * scope_name * scope_command -> obj =
declare_object {(default_object "DELIMITERS") with
cache_function = cache_scope_command;
open_function = simple_open open_scope_command;
load_function = load_scope_command;
subst_function = subst_scope_command;
classify_function = classify_scope_command}
let declare_scope local scope =
Lib.add_anonymous_leaf (inScopeCommand(local,scope,ScopeDeclare))
let add_delimiters local scope key =
Lib.add_anonymous_leaf (inScopeCommand(local,scope,ScopeDelimAdd key))
let remove_delimiters local scope =
Lib.add_anonymous_leaf (inScopeCommand(local,scope,ScopeDelimRemove))
let add_class_scope local scope cl =
Lib.add_anonymous_leaf (inScopeCommand(local,scope,ScopeClasses cl))
let add_syntactic_definition ~local deprecation env ident (vars,c) modl =
let open SyndefMods in
let skipped, { only_parsing; scopes } = interp_syndef_modifiers modl in
if skipped <> [] then
user_err (str "Simple notations don't support " ++ Ppvernac.pr_syntax_modifier (List.hd skipped));
let vars = List.map (fun v -> v, List.assoc_opt v scopes) vars in
let acvars,pat,reversibility =
match vars, intern_name_alias c with
| [], Some(r,u) ->
Id.Map.empty, NRef(r, u), APrioriReversible
| _ ->
let fold accu (id,scope) = Id.Map.add id (NtnInternTypeAny scope) accu in
let i_vars = List.fold_left fold Id.Map.empty vars in
let nenv = {
ninterp_var_type = i_vars;
ninterp_rec_vars = Id.Map.empty;
} in
interp_notation_constr env nenv c
in
let in_pat (id,_) = (id,ETConstr (Constrexpr.InConstrEntry,None,(NextLevel,InternalProd))) in
let interp = make_interpretation_vars ~default_if_binding:AsNameOrPattern [] 0 acvars (List.map in_pat vars) in
let vars = List.map (fun (x,_) -> (x, Id.Map.find x interp)) vars in
let also_in_cases_pattern = has_no_binders_type vars in
let onlyparsing = only_parsing || fst (printability None [] false reversibility pat) in
Syntax_def.declare_syntactic_definition ~local ~also_in_cases_pattern deprecation ident ~onlyparsing (vars,pat)
let warn_custom_entry =
CWarnings.create ~name:"custom-entry-overridden" ~category:"parsing"
(fun s ->
strbrk "Custom entry " ++ str s ++ strbrk " has been overridden.")
let load_custom_entry _ (_,(local,s)) =
if Egramcoq.exists_custom_entry s then warn_custom_entry s
else Egramcoq.create_custom_entry ~local s
let cache_custom_entry o = load_custom_entry 1 o
let subst_custom_entry (subst,x) = x
let classify_custom_entry (local,s as o) =
if local then Dispose else Substitute o
let inCustomEntry : locality_flag * string -> obj =
declare_object {(default_object "CUSTOM-ENTRIES") with
cache_function = cache_custom_entry;
load_function = load_custom_entry;
subst_function = subst_custom_entry;
classify_function = classify_custom_entry}
let declare_custom_entry local s =
if Egramcoq.exists_custom_entry s then
user_err Pp.(str "Custom entry " ++ str s ++ str " already exists.")
else
Lib.add_anonymous_leaf (inCustomEntry (local,s))