1 (* Copyright (C) 2004-2005, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://helm.cs.unibo.it/
28 module Ast = NotationPt
35 | TermValue of Ast.term
36 | StringValue of ident_or_var
38 | OptValue of value option
39 | ListValue of value list
45 | OptType of value_type
46 | ListType of value_type
48 exception Value_not_found of string
49 exception Type_mismatch of string * value_type
51 type declaration = string * value_type
52 type binding = string * (value_type * value)
58 with Not_found -> raise (Value_not_found name)
60 let lookup_value env name =
62 snd (List.assoc name env)
63 with Not_found -> raise (Value_not_found name)
65 let remove_name env name = List.remove_assoc name env
67 let remove_names env names =
68 List.filter (fun name, _ -> not (List.mem name names)) env
70 let lookup_term env name =
71 match lookup env name with
73 | ty, _ -> raise (Type_mismatch (name, ty))
75 let lookup_num env name =
76 match lookup env name with
78 | ty, _ -> raise (Type_mismatch (name, ty))
80 let lookup_string env name =
81 match lookup env name with
82 | _, StringValue x -> x
83 | ty, _ -> raise (Type_mismatch (name, ty))
85 let lookup_opt env name =
86 match lookup env name with
88 | ty, _ -> raise (Type_mismatch (name, ty))
90 let lookup_list env name =
91 match lookup env name with
93 | ty, _ -> raise (Type_mismatch (name, ty))
95 let opt_binding_some (n, (ty, v)) = (n, (OptType ty, OptValue (Some v)))
96 let opt_binding_none (n, (ty, v)) = (n, (OptType ty, OptValue None))
97 let opt_binding_of_name (n, ty) = (n, (OptType ty, OptValue None))
98 let list_binding_of_name (n, ty) = (n, (ListType ty, ListValue []))
99 let opt_declaration (n, ty) = (n, OptType ty)
100 let list_declaration (n, ty) = (n, ListType ty)
102 let declaration_of_var = function
103 | Ast.NumVar s -> s, NumType
104 | Ast.IdentVar s -> s, StringType
105 | Ast.TermVar (s,(Ast.Self l|Ast.Level l)) -> s, TermType l
108 let value_of_term = function
109 | Ast.Num (s, _) -> NumValue s
110 | Ast.Ident (s, (* `Ambiguous? *) _) -> StringValue (Var s)
113 let term_of_value = function
114 | NumValue s -> Ast.Num (s, None)
115 | StringValue (Ident s) -> Ast.Ident (s, `Ambiguous)
117 | _ -> assert false (* TO BE UNDERSTOOD *)
119 let rec well_typed ty value =
121 | TermType _, TermValue _
122 | StringType, StringValue _
123 | OptType _, OptValue None
124 | NumType, NumValue _ -> true
125 | OptType ty', OptValue (Some value') -> well_typed ty' value'
126 | ListType ty', ListValue vl ->
127 List.for_all (fun value' -> well_typed ty' value') vl
130 let declarations_of_env = List.map (fun (name, (ty, _)) -> (name, ty))
131 let declarations_of_term p =
132 List.map declaration_of_var (NotationUtil.variables_of_term p)
134 let rec combine decls values =
135 match decls, values with
137 | (name, ty) :: decls, v :: values ->
138 (name, (ty, v)) :: (combine decls values)
141 let coalesce_env declarations env_list =
142 let env0 = List.map list_binding_of_name declarations in
143 let grow_env_entry env n v =
146 | (n', (ty, ListValue vl)) as entry ->
147 if n' = n then n', (ty, ListValue (v :: vl)) else entry
151 let grow_env env_i env =
153 (fun env (n, (_, v)) -> grow_env_entry env n v)
156 List.fold_right grow_env env_list env0