Custom base types
[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.
17*)
18
19(* Domtool type-checking and reduction environments *)
20
21signature ENV = sig
22
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23 val registerType : string * (Ast.exp -> bool) -> unit
24 val typeRule : string -> (Ast.exp -> bool) option
25
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26 type env
27 val empty : env
28
29 val bindType : env -> string -> env
30 val bindVal : env -> string * Ast.typ * Ast.exp option -> env
31
32 val lookupType : env -> string -> bool
33 val lookupVal : env -> string -> Ast.typ option
34 val lookupEquation : env -> string -> Ast.exp option
35
36end