1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(* $Id: nameops.ml,v 1.21.2.2 2004/10/12 10:12:31 herbelin Exp $ *)
open Pp
open Util
open Names
(* Identifiers *)
let pr_id id = str (string_of_id id)
let wildcard = id_of_string "_"
(* Utilities *)
let code_of_0 = Char.code '0'
let code_of_9 = Char.code '9'
let cut_ident skip_quote s =
let s = string_of_id s in
let slen = String.length s in
(* [n'] is the position of the first non nullary digit *)
let rec numpart n n' =
if 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 c = code_of_0 && 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 & (c = Char.code '\'' || 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 = string_of_id s in
let slen = String.length s in
if 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 (string_of_id 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 = string_of_id id in
let len = String.length id in
let rec add carrypos =
let c = id.[carrypos] in
if is_digit c then
if c = '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 = string_of_id 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 (string_of_id id) 0 newid 0 numstart;
(id_of_string newid)
let add_suffix id s = id_of_string (string_of_id id ^ s)
let add_prefix s id = id_of_string (s ^ string_of_id id)
let atompart_of_id id = fst (repr_ident id)
(* Fresh names *)
let lift_ident = lift_subscript
let next_ident_away id avoid =
if List.mem id avoid then
let id0 = if not (has_subscript id) then id else
(* Ce serait sans doute mieux avec quelque chose inspir de
*** make_ident id (Some 0) *** mais a brise la compatibilit... *)
forget_subscript id in
let rec name_rec id =
if List.mem id avoid then name_rec (lift_ident id) else id in
name_rec id0
else id
let next_ident_away_from id avoid =
let rec name_rec id =
if List.mem id avoid then name_rec (lift_ident id) else id in
name_rec id
(* Names *)
let out_name = function
| Name id -> id
| Anonymous -> anomaly "out_name: expects a defined name"
let name_fold f na a =
match na with
| Name id -> f id a
| Anonymous -> a
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 next_name_away_with_default default name l =
match name with
| Name str -> next_ident_away str l
| Anonymous -> next_ident_away (id_of_string default) l
let next_name_away name l =
match name with
| Name str -> next_ident_away str l
| Anonymous -> id_of_string "_"
let pr_lab l = str (string_of_label l)
let default_library = Names.initial_dir (* = ["Top"] *)
(*s Roots of the space of absolute names *)
let coq_root = id_of_string "Coq"
let default_root_prefix = make_dirpath []
(* Metavariables *)
let pr_meta = Pp.int
let string_of_meta = string_of_int
|
