1 (* HCoop
Domtool (http
://hcoop
.sourceforge
.net
/)
2 * Copyright (c
) 2006, Adam Chlipala
4 * This program is free software
; you can redistribute it
and/or
5 * modify it under the terms
of the GNU General Public License
6 * as published by the Free Software Foundation
; either version
2
7 * of the License
, or (at your option
) any later version
.
9 * This program is distributed
in the hope that it will be useful
,
10 * but WITHOUT ANY WARRANTY
; without even the implied warranty
of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
. See the
12 * GNU General Public License for more details
.
14 * You should have received a copy
of the GNU General Public License
15 * along
with this program
; if not
, write to the Free Software
16 * Foundation
, Inc
., 51 Franklin Street
, Fifth Floor
, Boston
, MA
02110-1301, USA
.
19 (* Default record field database
*)
21 structure Defaults
:> DEFAULTS
= struct
25 structure SM
= StringMap
27 val dmy
= ErrorMsg
.dummyLoc
29 val defaultT
: record ref
= ref SM
.empty
30 val defaultV
: (unit
-> exp
) SM
.map ref
= ref SM
.empty
32 fun registerDefault (name
, t
, v
) =
33 case SM
.find (!defaultT
, name
) of
34 NONE
=> (defaultT
:= SM
.insert (!defaultT
, name
, t
);
35 defaultV
:= SM
.insert (!defaultV
, name
, v
))
36 | SOME _
=> raise Fail
"Duplicate default environment variable"
38 fun tInit () = (TAction ((CRoot
, dmy
),
43 fun eInit () = SM
.map (fn f
=> f ()) (!defaultV
)