Fix indentation in GPL headers
[hcoop/domtool2.git] / src / env.sig
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1(* HCoop Domtool (http://hcoop.sourceforge.net/)
2 * Copyright (c) 2006, Adam Chlipala
3 *
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.
8 *
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.
13 *
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.
dac62e84 17 *)
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18
19(* Domtool type-checking and reduction environments *)
20
21signature ENV = sig
22
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23 type typeRule = Ast.exp -> bool
24 val registerType : string * typeRule -> unit
25 val typeRule : string -> typeRule option
26
27 type env_vars = Ast.exp Ast.StringMap.map
28 type action = env_vars * Ast.exp list -> env_vars
29 val registerAction : string * action -> unit
30 val action : string -> action option
31
32 val registerContainer : string * action * (unit -> unit) -> unit
33 val container : string -> (action * (unit -> unit)) option
34
35 val badArgs : string -> 'a
6be996d4 36
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37 type env
38 val empty : env
39
40 val bindType : env -> string -> env
41 val bindVal : env -> string * Ast.typ * Ast.exp option -> env
42
43 val lookupType : env -> string -> bool
44 val lookupVal : env -> string -> Ast.typ option
45 val lookupEquation : env -> string -> Ast.exp option
46
47end