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
|
(***********************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA-Rocquencourt & LRI-CNRS-Orsay *)
(* \VV/ *************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(***********************************************************************)
open Pp
open Util
open Names
open Pcoq
open Libnames
open Topconstr
open G_ascii_syntax
open Rawterm
open Coqlib
exception Non_closed_string
(* make a string term from the string s *)
let string_module = ["Coq";"Strings";"String"]
let string_path = make_path string_module "string"
let string_kn = make_kn string_module "string"
let static_glob_EmptyString = ConstructRef ((string_kn,0),1)
let static_glob_String = ConstructRef ((string_kn,0),2)
let make_reference id = find_reference "String interpretation" string_module id
let glob_String = lazy (make_reference "String")
let glob_EmptyString = lazy (make_reference "EmptyString")
open Lazy
let interp_string dloc s =
let le = String.length s in
let rec aux n =
if n = le then RRef (dloc, force glob_EmptyString) else
RApp (dloc,RRef (dloc, force glob_String),
[interp_ascii dloc (int_of_char s.[n]); aux (n+1)])
in aux 0
let uninterp_string r =
try
let b = Buffer.create 16 in
let rec aux = function
| RApp (_,RRef (_,k),[a;s]) when k = force glob_String ->
(match uninterp_ascii a with
| Some c -> Buffer.add_char b (Char.chr c); aux s
| _ -> raise Non_closed_string)
| RRef (_,z) when z = force glob_EmptyString ->
Some (Buffer.contents b)
| _ ->
raise Non_closed_string
in aux r
with
Non_closed_string -> None
let _ =
Notation.declare_string_interpreter "string_scope"
(string_path,["Coq";"Strings";"String"])
interp_string
([RRef (dummy_loc,static_glob_String);
RRef (dummy_loc,static_glob_EmptyString)],
uninterp_string, true)
|
