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492c1cff AC |
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 | *) |
492c1cff AC |
18 | |
19 | (* Domtool type-checking and reduction environments *) | |
20 | ||
21 | structure Env :> ENV = struct | |
22 | ||
23 | open Ast | |
24 | ||
25 | structure SS = StringSet | |
26 | structure SM = StringMap | |
27 | ||
a3698041 AC |
28 | type typeRule = exp -> bool |
29 | val typeRules : typeRule SM.map ref = ref SM.empty | |
6be996d4 AC |
30 | fun registerType (name, rule) = typeRules := SM.insert (!typeRules, name, rule) |
31 | fun typeRule name = SM.find (!typeRules, name) | |
32 | ||
a3698041 AC |
33 | type env_vars = exp SM.map |
34 | type action = env_vars * Ast.exp list -> env_vars | |
35 | val actions : action SM.map ref = ref SM.empty | |
36 | fun registerAction (name, action) = actions := SM.insert (!actions, name, action) | |
37 | fun action name = SM.find (!actions, name) | |
38 | ||
39 | val containers : (action * (unit -> unit)) SM.map ref = ref SM.empty | |
40 | fun registerContainer (name, befor, after) = | |
41 | containers := SM.insert (!containers, name, (befor, after)) | |
42 | fun container name = SM.find (!containers, name) | |
43 | ||
e0b0abd2 AC |
44 | local |
45 | val pr = ref (fn () => ()) | |
46 | in | |
47 | ||
48 | fun registerPre f = | |
49 | let | |
50 | val old = !pr | |
51 | in | |
52 | pr := (fn () => (old (); f ())) | |
53 | end | |
54 | fun pre () = !pr () | |
55 | ||
56 | end | |
57 | ||
58 | local | |
59 | val pst = ref (fn () => ()) | |
60 | in | |
61 | ||
62 | fun registerPost f = | |
63 | let | |
64 | val old = !pst | |
65 | in | |
66 | pst := (fn () => (old (); f ())) | |
67 | end | |
68 | fun post () = !pst () | |
69 | ||
70 | end | |
71 | ||
12adf55a AC |
72 | local |
73 | val pr = ref (fn () => ()) | |
74 | in | |
75 | ||
76 | fun registerPreTycheck f = | |
77 | let | |
78 | val old = !pr | |
79 | in | |
80 | pr := (fn () => (old (); f ())) | |
81 | end | |
82 | fun preTycheck () = !pr () | |
83 | ||
84 | end | |
85 | ||
629a34f6 AC |
86 | fun badArgs (name, args) = |
87 | (print ("Invalid arguments to " ^ name ^ "\n"); | |
88 | app (fn arg => Print.preface ("Argument: ", Print.p_exp arg)) args; | |
89 | raise Domain) | |
90 | fun badArg (func, arg, v) = | |
91 | (print ("Invalid " ^ arg ^ " argument to " ^ func ^ "\n"); | |
92 | Print.preface ("Argument: ", Print.p_exp v); | |
93 | raise Domain) | |
94 | ||
95 | type 'a arg = exp -> 'a option | |
96 | ||
97 | fun int (EInt n, _) = SOME n | |
98 | | int _ = NONE | |
99 | ||
100 | fun string (EString s, _) = SOME s | |
101 | | string _ = NONE | |
102 | ||
8a7c40fa AC |
103 | fun bool (EVar "false", _) = SOME false |
104 | | bool (EVar "true", _) = SOME true | |
105 | | bool _ = NONE | |
106 | ||
629a34f6 AC |
107 | fun mapFail f [] = SOME [] |
108 | | mapFail f (h :: t) = | |
109 | case f h of | |
110 | NONE => NONE | |
111 | | SOME h' => | |
112 | case mapFail f t of | |
113 | NONE => NONE | |
114 | | SOME t' => SOME (h' :: t') | |
115 | ||
116 | fun list f (EList ls, _) = mapFail f ls | |
117 | | list _ _ = NONE | |
118 | ||
ed9fda3a AC |
119 | fun none func f (_, []) = (f (); |
120 | SM.empty) | |
121 | | none func _ (_, es) = badArgs (func, es) | |
122 | ||
629a34f6 AC |
123 | fun one func (name, arg) f (_, [e]) = |
124 | (case arg e of | |
125 | NONE => badArg (func, name, e) | |
126 | | SOME v => (f v; | |
127 | SM.empty)) | |
128 | | one func _ _ (_, es) = badArgs (func, es) | |
129 | ||
130 | fun two func (name1, arg1, name2, arg2) f (_, [e1, e2]) = | |
131 | (case (arg1 e1, arg2 e2) of | |
132 | (NONE, _) => badArg (func, name1, e1) | |
133 | | (_, NONE) => badArg (func, name2, e2) | |
134 | | (SOME v1, SOME v2) => (f (v1, v2); | |
135 | SM.empty)) | |
136 | | two func _ _ (_, es) = badArgs (func, es) | |
137 | ||
f8dfbbcc AC |
138 | fun three func (name1, arg1, name2, arg2, name3, arg3) f (_, [e1, e2, e3]) = |
139 | (case (arg1 e1, arg2 e2, arg3 e3) of | |
140 | (NONE, _, _) => badArg (func, name1, e1) | |
141 | | (_, NONE, _) => badArg (func, name2, e2) | |
142 | | (_, _, NONE) => badArg (func, name3, e3) | |
143 | | (SOME v1, SOME v2, SOME v3) => (f (v1, v2, v3); | |
144 | SM.empty)) | |
145 | | three func _ _ (_, es) = badArgs (func, es) | |
6ae327f8 AC |
146 | |
147 | fun oneV func (name, arg) f (evs, [e]) = | |
148 | (case arg e of | |
149 | NONE => badArg (func, name, e) | |
150 | | SOME v => (f (evs, v); | |
151 | SM.empty)) | |
152 | | oneV func _ _ (_, es) = badArgs (func, es) | |
153 | ||
e0b0abd2 AC |
154 | fun twoV func (name1, arg1, name2, arg2) f (evs, [e1, e2]) = |
155 | (case (arg1 e1, arg2 e2) of | |
156 | (NONE, _) => badArg (func, name1, e1) | |
157 | | (_, NONE) => badArg (func, name2, e2) | |
158 | | (SOME v1, SOME v2) => (f (evs, v1, v2); | |
159 | SM.empty)) | |
160 | | twoV func _ _ (_, es) = badArgs (func, es) | |
161 | ||
6ae327f8 AC |
162 | |
163 | fun env arg (evs, name) = | |
164 | case SM.find (evs, name) of | |
165 | NONE => raise Fail ("Unavailable environment variable " ^ name) | |
166 | | SOME e => | |
167 | case arg e of | |
168 | NONE => raise Fail ("Bad format for environment variable " ^ name) | |
169 | | SOME v => v | |
170 | ||
629a34f6 AC |
171 | fun type_one func arg f = |
172 | registerType (func, fn e => | |
173 | case arg e of | |
174 | NONE => false | |
175 | | SOME v => f v) | |
176 | ||
ed9fda3a | 177 | fun action_none name f = registerAction (name, none name f) |
629a34f6 AC |
178 | fun action_one name args f = registerAction (name, one name args f) |
179 | fun action_two name args f = registerAction (name, two name args f) | |
f8dfbbcc | 180 | fun action_three name args f = registerAction (name, three name args f) |
629a34f6 | 181 | |
e0b0abd2 | 182 | fun actionV_none name f = registerAction (name, fn (env, _) => (f env; env)) |
6ae327f8 | 183 | fun actionV_one name args f = registerAction (name, oneV name args f) |
e0b0abd2 | 184 | fun actionV_two name args f = registerAction (name, twoV name args f) |
6ae327f8 AC |
185 | |
186 | fun container_none name (f, g) = registerContainer (name, none name f, g) | |
629a34f6 | 187 | fun container_one name args (f, g) = registerContainer (name, one name args f, g) |
a3698041 | 188 | |
6ae327f8 AC |
189 | fun containerV_one name args (f, g) = registerContainer (name, oneV name args f, g) |
190 | ||
095de39e AC |
191 | type env = SS.set * (typ * exp option) SM.map * SS.set |
192 | val empty : env = (SS.empty, SM.empty, SS.empty) | |
492c1cff | 193 | |
095de39e AC |
194 | fun lookupType (ts, _, _) name = SS.member (ts, name) |
195 | fun lookupVal (_, vs, _) name = | |
492c1cff AC |
196 | case SM.find (vs, name) of |
197 | NONE => NONE | |
198 | | SOME (t, _) => SOME t | |
095de39e | 199 | fun lookupEquation (_, vs, _) name = |
492c1cff AC |
200 | case SM.find (vs, name) of |
201 | NONE => NONE | |
202 | | SOME (_, eqo) => eqo | |
095de39e | 203 | fun lookupContext (_, _, cs) name = SS.member (cs, name) |
492c1cff | 204 | |
095de39e AC |
205 | fun bindType (ts, vs, cs) name = (SS.add (ts, name), vs, cs) |
206 | fun bindVal (ts, vs, cs) (name, t, eqo) = (ts, SM.insert (vs, name, (t, eqo)), cs) | |
207 | fun bindContext (ts, vs, cs) name = (ts, vs, SS.add (cs, name)) | |
208 | ||
209 | fun types (ts, _, _) = ts | |
210 | fun vals (_, vs, _) = SM.foldli (fn (name, _, vs) => SS.add (vs, name)) SS.empty vs | |
211 | fun contexts (_, _, cs) = cs | |
492c1cff AC |
212 | |
213 | end |