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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2012 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Pp
open Util
open Names
(* Identifiers *)
let pr_id id = str (Id.to_string id)
let pr_name = function
| Anonymous -> str "_"
| Name id -> pr_id id
(* Utilities *)
let code_of_0 = Char.code '0'
let code_of_9 = Char.code '9'
let cut_ident skip_quote s =
let s = Id.to_string s in
let slen = String.length s in
(* [n'] is the position of the first non nullary digit *)
let rec numpart n n' =
if Int.equal n 0 then
(* ident made of _ and digits only [and ' if skip_quote]: don't cut it *)
slen
else
let c = Char.code (String.get s (n-1)) in
if Int.equal c code_of_0 && not (Int.equal n slen) then
numpart (n-1) n'
else if code_of_0 <= c && c <= code_of_9 then
numpart (n-1) (n-1)
else if skip_quote && (Int.equal c (Char.code '\'') || Int.equal c (Char.code '_')) then
numpart (n-1) (n-1)
else
n'
in
numpart slen slen
let repr_ident s =
let numstart = cut_ident false s in
let s = Id.to_string s in
let slen = String.length s in
if Int.equal numstart slen then
(s, None)
else
(String.sub s 0 numstart,
Some (int_of_string (String.sub s numstart (slen - numstart))))
let make_ident sa = function
| Some n ->
let c = Char.code (String.get sa (String.length sa -1)) in
let s =
if c < code_of_0 or c > code_of_9 then sa ^ (string_of_int n)
else sa ^ "_" ^ (string_of_int n) in
Id.of_string s
| None -> Id.of_string (String.copy sa)
let root_of_id id =
let suffixstart = cut_ident true id in
Id.of_string (String.sub (Id.to_string id) 0 suffixstart)
(* Rem: semantics is a bit different, if an ident starts with toto00 then
after successive renamings it comes to toto09, then it goes on with toto10 *)
let lift_subscript id =
let id = Id.to_string id in
let len = String.length id in
let rec add carrypos =
let c = id.[carrypos] in
if is_digit c then
if Int.equal (Char.code c) (Char.code '9') then begin
assert (carrypos>0);
add (carrypos-1)
end
else begin
let newid = String.copy id in
String.fill newid (carrypos+1) (len-1-carrypos) '0';
newid.[carrypos] <- Char.chr (Char.code c + 1);
newid
end
else begin
let newid = id^"0" in
if carrypos < len-1 then begin
String.fill newid (carrypos+1) (len-1-carrypos) '0';
newid.[carrypos+1] <- '1'
end;
newid
end
in Id.of_string (add (len-1))
let has_subscript id =
let id = Id.to_string id in
is_digit (id.[String.length id - 1])
let forget_subscript id =
let numstart = cut_ident false id in
let newid = String.make (numstart+1) '0' in
String.blit (Id.to_string id) 0 newid 0 numstart;
(Id.of_string newid)
let add_suffix id s = Id.of_string (Id.to_string id ^ s)
let add_prefix s id = Id.of_string (s ^ Id.to_string id)
let atompart_of_id id = fst (repr_ident id)
(* Names *)
let out_name = function
| Name id -> id
| Anonymous -> failwith "Nameops.out_name"
let name_fold f na a =
match na with
| Name id -> f id a
| Anonymous -> a
let name_iter f na = name_fold (fun x () -> f x) na ()
let name_cons na l =
match na with
| Anonymous -> l
| Name id -> id::l
let name_app f = function
| Name id -> Name (f id)
| Anonymous -> Anonymous
let name_fold_map f e = function
| Name id -> let (e,id) = f e id in (e,Name id)
| Anonymous -> e,Anonymous
let pr_lab l = str (Label.to_string l)
let default_library = Names.DirPath.initial (* = ["Top"] *)
(*s Roots of the space of absolute names *)
let coq_root = Id.of_string "Coq"
let default_root_prefix = DirPath.empty
(* Metavariables *)
let pr_meta = Pp.int
let string_of_meta = string_of_int
|
