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
|
/* 'df' command for virtual domains. -*- text -*-
(C) Copyright 2007-2008 Richard W.M. Jones, Red Hat Inc.
http://libvirt.org/
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* Parser for LVM2 metadata.
ocamlyacc tutorial:
http://plus.kaist.ac.kr/~shoh/ocaml/ocamllex-ocamlyacc/ocamlyacc-tutorial/
*/
%{
open Virt_df_lvm2_metadata
%}
%token LBRACE RBRACE /* { } */
%token LSQUARE RSQUARE /* [ ] */
%token EQ /* = */
%token COMMA /* , */
%token <string> STRING /* "string" */
%token <int64> INT /* an integer */
%token <float> FLOAT /* a float */
%token <string> IDENT /* a naked keyword/identifier */
%token EOF /* end of file */
%start input
%type <Virt_df_lvm2_metadata.metadata> input
%%
input : lines EOF { List.rev $1 }
;
lines : /* empty */ { [] }
| lines line { $2 :: $1 }
;
line : /* empty */ /* These dummy entries get removed after parsing. */
{ ("", String "") }
| IDENT EQ value
{ ($1, $3) }
| IDENT LBRACE lines RBRACE
{ ($1, Metadata (List.rev $3)) }
;
value : STRING { String $1 }
| INT { Int $1 }
| FLOAT { Float $1 }
| LSQUARE list RSQUARE
{ List (List.rev $2) }
;
list : /* empty */ { [] }
| value { [$1] }
| list COMMA value
{ $3 :: $1 }
;
|
