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492c1cff AC |
1 | (* HCoop Domtool (http://hcoop.sourceforge.net/) |
2 | * Copyright (c) 2006, Adam Chlipala | |
e140629f | 3 | * Copyright (c) 2014 Clinton Ebadi <clinton@unknownlamer.org> |
492c1cff AC |
4 | * |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License | |
7 | * as published by the Free Software Foundation; either version 2 | |
8 | * of the License, or (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
dac62e84 | 18 | *) |
492c1cff AC |
19 | |
20 | (* Domtool type-checking and reduction environments *) | |
21 | ||
22 | structure Env :> ENV = struct | |
23 | ||
24 | open Ast | |
25 | ||
26 | structure SS = StringSet | |
27 | structure SM = StringMap | |
28 | ||
a3698041 AC |
29 | type typeRule = exp -> bool |
30 | val typeRules : typeRule SM.map ref = ref SM.empty | |
6be996d4 AC |
31 | fun registerType (name, rule) = typeRules := SM.insert (!typeRules, name, rule) |
32 | fun typeRule name = SM.find (!typeRules, name) | |
33 | ||
a3698041 AC |
34 | type env_vars = exp SM.map |
35 | type action = env_vars * Ast.exp list -> env_vars | |
36 | val actions : action SM.map ref = ref SM.empty | |
37 | fun registerAction (name, action) = actions := SM.insert (!actions, name, action) | |
38 | fun action name = SM.find (!actions, name) | |
39 | ||
40 | val containers : (action * (unit -> unit)) SM.map ref = ref SM.empty | |
41 | fun registerContainer (name, befor, after) = | |
42 | containers := SM.insert (!containers, name, (befor, after)) | |
43 | fun container name = SM.find (!containers, name) | |
44 | ||
cf879b4f AC |
45 | val functions : (exp list -> exp option) SM.map ref = ref SM.empty |
46 | fun registerFunction (name, f) = | |
47 | functions := SM.insert (!functions, name, f) | |
48 | fun function name = SM.find (!functions, name) | |
49 | ||
e0b0abd2 AC |
50 | local |
51 | val pr = ref (fn () => ()) | |
52 | in | |
53 | ||
54 | fun registerPre f = | |
55 | let | |
56 | val old = !pr | |
57 | in | |
58 | pr := (fn () => (old (); f ())) | |
59 | end | |
60 | fun pre () = !pr () | |
61 | ||
62 | end | |
63 | ||
64 | local | |
65 | val pst = ref (fn () => ()) | |
66 | in | |
67 | ||
68 | fun registerPost f = | |
69 | let | |
70 | val old = !pst | |
71 | in | |
72 | pst := (fn () => (old (); f ())) | |
73 | end | |
74 | fun post () = !pst () | |
75 | ||
76 | end | |
77 | ||
12adf55a AC |
78 | local |
79 | val pr = ref (fn () => ()) | |
80 | in | |
81 | ||
82 | fun registerPreTycheck f = | |
83 | let | |
84 | val old = !pr | |
85 | in | |
86 | pr := (fn () => (old (); f ())) | |
87 | end | |
88 | fun preTycheck () = !pr () | |
89 | ||
90 | end | |
91 | ||
629a34f6 AC |
92 | fun badArgs (name, args) = |
93 | (print ("Invalid arguments to " ^ name ^ "\n"); | |
94 | app (fn arg => Print.preface ("Argument: ", Print.p_exp arg)) args; | |
95 | raise Domain) | |
96 | fun badArg (func, arg, v) = | |
97 | (print ("Invalid " ^ arg ^ " argument to " ^ func ^ "\n"); | |
98 | Print.preface ("Argument: ", Print.p_exp v); | |
99 | raise Domain) | |
100 | ||
101 | type 'a arg = exp -> 'a option | |
102 | ||
103 | fun int (EInt n, _) = SOME n | |
104 | | int _ = NONE | |
105 | ||
106 | fun string (EString s, _) = SOME s | |
107 | | string _ = NONE | |
108 | ||
8a7c40fa AC |
109 | fun bool (EVar "false", _) = SOME false |
110 | | bool (EVar "true", _) = SOME true | |
111 | | bool _ = NONE | |
112 | ||
629a34f6 AC |
113 | fun mapFail f [] = SOME [] |
114 | | mapFail f (h :: t) = | |
115 | case f h of | |
116 | NONE => NONE | |
117 | | SOME h' => | |
118 | case mapFail f t of | |
119 | NONE => NONE | |
120 | | SOME t' => SOME (h' :: t') | |
121 | ||
122 | fun list f (EList ls, _) = mapFail f ls | |
123 | | list _ _ = NONE | |
124 | ||
ed9fda3a AC |
125 | fun none func f (_, []) = (f (); |
126 | SM.empty) | |
127 | | none func _ (_, es) = badArgs (func, es) | |
128 | ||
629a34f6 AC |
129 | fun one func (name, arg) f (_, [e]) = |
130 | (case arg e of | |
131 | NONE => badArg (func, name, e) | |
132 | | SOME v => (f v; | |
133 | SM.empty)) | |
134 | | one func _ _ (_, es) = badArgs (func, es) | |
135 | ||
136 | fun two func (name1, arg1, name2, arg2) f (_, [e1, e2]) = | |
137 | (case (arg1 e1, arg2 e2) of | |
138 | (NONE, _) => badArg (func, name1, e1) | |
139 | | (_, NONE) => badArg (func, name2, e2) | |
140 | | (SOME v1, SOME v2) => (f (v1, v2); | |
141 | SM.empty)) | |
142 | | two func _ _ (_, es) = badArgs (func, es) | |
143 | ||
f8dfbbcc AC |
144 | fun three func (name1, arg1, name2, arg2, name3, arg3) f (_, [e1, e2, e3]) = |
145 | (case (arg1 e1, arg2 e2, arg3 e3) of | |
146 | (NONE, _, _) => badArg (func, name1, e1) | |
147 | | (_, NONE, _) => badArg (func, name2, e2) | |
148 | | (_, _, NONE) => badArg (func, name3, e3) | |
149 | | (SOME v1, SOME v2, SOME v3) => (f (v1, v2, v3); | |
150 | SM.empty)) | |
151 | | three func _ _ (_, es) = badArgs (func, es) | |
6ae327f8 | 152 | |
fb09779a AC |
153 | fun four func (name1, arg1, name2, arg2, name3, arg3, name4, arg4) f (_, [e1, e2, e3, e4]) = |
154 | (case (arg1 e1, arg2 e2, arg3 e3, arg4 e4) of | |
155 | (NONE, _, _, _) => badArg (func, name1, e1) | |
156 | | (_, NONE, _, _) => badArg (func, name2, e2) | |
157 | | (_, _, NONE, _) => badArg (func, name3, e3) | |
158 | | (_, _, _, NONE) => badArg (func, name4, e4) | |
159 | | (SOME v1, SOME v2, SOME v3, SOME v4) => (f (v1, v2, v3, v4); | |
160 | SM.empty)) | |
161 | | four func _ _ (_, es) = badArgs (func, es) | |
162 | ||
57e066bb AC |
163 | fun noneV func f (evs, []) = (f evs; |
164 | SM.empty) | |
165 | | noneV func _ (_, es) = badArgs (func, es) | |
166 | ||
6ae327f8 AC |
167 | fun oneV func (name, arg) f (evs, [e]) = |
168 | (case arg e of | |
169 | NONE => badArg (func, name, e) | |
170 | | SOME v => (f (evs, v); | |
171 | SM.empty)) | |
172 | | oneV func _ _ (_, es) = badArgs (func, es) | |
173 | ||
e0b0abd2 AC |
174 | fun twoV func (name1, arg1, name2, arg2) f (evs, [e1, e2]) = |
175 | (case (arg1 e1, arg2 e2) of | |
176 | (NONE, _) => badArg (func, name1, e1) | |
177 | | (_, NONE) => badArg (func, name2, e2) | |
178 | | (SOME v1, SOME v2) => (f (evs, v1, v2); | |
179 | SM.empty)) | |
180 | | twoV func _ _ (_, es) = badArgs (func, es) | |
181 | ||
6ae327f8 AC |
182 | |
183 | fun env arg (evs, name) = | |
184 | case SM.find (evs, name) of | |
185 | NONE => raise Fail ("Unavailable environment variable " ^ name) | |
186 | | SOME e => | |
187 | case arg e of | |
47163553 AC |
188 | NONE => (Print.preface ("Unexpected value for " ^ name ^ ":", |
189 | Print.p_exp e); | |
190 | raise Fail ("Bad format for environment variable " ^ name)) | |
6ae327f8 AC |
191 | | SOME v => v |
192 | ||
629a34f6 AC |
193 | fun type_one func arg f = |
194 | registerType (func, fn e => | |
195 | case arg e of | |
196 | NONE => false | |
197 | | SOME v => f v) | |
198 | ||
ed9fda3a | 199 | fun action_none name f = registerAction (name, none name f) |
629a34f6 AC |
200 | fun action_one name args f = registerAction (name, one name args f) |
201 | fun action_two name args f = registerAction (name, two name args f) | |
f8dfbbcc | 202 | fun action_three name args f = registerAction (name, three name args f) |
fb09779a | 203 | fun action_four name args f = registerAction (name, four name args f) |
629a34f6 | 204 | |
e0b0abd2 | 205 | fun actionV_none name f = registerAction (name, fn (env, _) => (f env; env)) |
6ae327f8 | 206 | fun actionV_one name args f = registerAction (name, oneV name args f) |
e0b0abd2 | 207 | fun actionV_two name args f = registerAction (name, twoV name args f) |
6ae327f8 AC |
208 | |
209 | fun container_none name (f, g) = registerContainer (name, none name f, g) | |
629a34f6 | 210 | fun container_one name args (f, g) = registerContainer (name, one name args f, g) |
a3698041 | 211 | |
57e066bb | 212 | fun containerV_none name (f, g) = registerContainer (name, noneV name f, g) |
6ae327f8 AC |
213 | fun containerV_one name args (f, g) = registerContainer (name, oneV name args f, g) |
214 | ||
8061fadf CE |
215 | datatype env = Env of SS.set * (typ * exp option * env) SM.map * SS.set * (typ * exp * env) SM.map |
216 | val empty : env = Env (SS.empty, SM.empty, SS.empty, SM.empty) | |
492c1cff | 217 | |
e140629f | 218 | |
8061fadf CE |
219 | fun initialDynEnvTypes (Env (_, _, _, ds)) = |
220 | SM.map (fn (t, _, _) => t) ds | |
e140629f | 221 | |
254d5faa CE |
222 | (* hack ahead: These are not reduced when declared and must be before |
223 | starting evaluation. Pass in reduceExp, and force an awkward | |
224 | calling convention so no one thinks this is the Right Way (tm) *) | |
8061fadf CE |
225 | fun initialDynEnvVals f (Env (_, _, _, ds)) = |
226 | SM.map (fn (t, v, env) => f env v) ds | |
e140629f | 227 | |
8061fadf CE |
228 | fun lookupType (Env (ts, _, _, _)) name = SS.member (ts, name) |
229 | fun lookupVal (Env (_, vs, _, _)) name = | |
492c1cff AC |
230 | case SM.find (vs, name) of |
231 | NONE => NONE | |
8061fadf CE |
232 | | SOME (t, _, _) => SOME t |
233 | fun lookupEquation (Env (_, vs, _, _)) name = | |
492c1cff AC |
234 | case SM.find (vs, name) of |
235 | NONE => NONE | |
8061fadf CE |
236 | | SOME (_, NONE, _) => NONE |
237 | | SOME (_, SOME eq, env) => SOME (eq, env) | |
238 | fun lookupContext (Env (_, _, cs, _)) name = SS.member (cs, name) | |
239 | fun lookupInitialDynEnvVal (Env (_, _, _, ds)) name = | |
e140629f CE |
240 | case SM.find (ds, name) of |
241 | NONE => NONE | |
8061fadf | 242 | | SOME (t, _, _) => SOME t |
492c1cff | 243 | |
8061fadf CE |
244 | fun bindType (Env (ts, vs, cs, ds)) name = Env (SS.add (ts, name), vs, cs, ds) |
245 | fun bindVal (env as (Env (ts, vs, cs, ds))) (name, t, eqo) = Env (ts, SM.insert (vs, name, (t, eqo, env)), cs, ds) | |
246 | fun bindContext (Env (ts, vs, cs, ds)) name = Env (ts, vs, SS.add (cs, name), ds) | |
247 | fun bindInitialDynEnvVal (env as (Env (ts, vs, cs, ds))) (name, t, eqn) = Env (ts, vs, cs, SM.insert (ds, name, (t, eqn, env))) | |
095de39e | 248 | |
8061fadf CE |
249 | fun types (Env (ts, _, _, _)) = ts |
250 | fun vals (Env (_, vs, _, _)) = SM.foldli (fn (name, _, vs) => SS.add (vs, name)) SS.empty vs | |
251 | fun contexts (Env (_, _, cs, _)) = cs | |
252 | fun dynamics (Env (_, _, _, ds)) = SM.foldli (fn (name, _, ds) => SS.add (ds, name)) SS.empty ds | |
492c1cff AC |
253 | |
254 | end |