X-Git-Url: https://git.hcoop.net/hcoop/domtool2.git/blobdiff_plain/492c1cff68a2da969a559627725369c211470c92..411a85f26421358c20b11839310cce6caff8cf77:/src/env.sml diff --git a/src/env.sml b/src/env.sml index b52ead1..1a93a38 100644 --- a/src/env.sml +++ b/src/env.sml @@ -14,7 +14,7 @@ * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. -*) + *) (* Domtool type-checking and reduction environments *) @@ -25,21 +25,189 @@ open Ast structure SS = StringSet structure SM = StringMap -type env = SS.set * (typ * exp option) SM.map -val empty : env = (SS.add (SS.singleton "int", "string"), - SM.empty) +type typeRule = exp -> bool +val typeRules : typeRule SM.map ref = ref SM.empty +fun registerType (name, rule) = typeRules := SM.insert (!typeRules, name, rule) +fun typeRule name = SM.find (!typeRules, name) -fun lookupType (ts, _) name = SS.member (ts, name) -fun lookupVal (_, vs) name = +type env_vars = exp SM.map +type action = env_vars * Ast.exp list -> env_vars +val actions : action SM.map ref = ref SM.empty +fun registerAction (name, action) = actions := SM.insert (!actions, name, action) +fun action name = SM.find (!actions, name) + +val containers : (action * (unit -> unit)) SM.map ref = ref SM.empty +fun registerContainer (name, befor, after) = + containers := SM.insert (!containers, name, (befor, after)) +fun container name = SM.find (!containers, name) + +local + val pr = ref (fn () => ()) +in + +fun registerPre f = + let + val old = !pr + in + pr := (fn () => (old (); f ())) + end +fun pre () = !pr () + +end + +local + val pst = ref (fn () => ()) +in + +fun registerPost f = + let + val old = !pst + in + pst := (fn () => (old (); f ())) + end +fun post () = !pst () + +end + +local + val pr = ref (fn () => ()) +in + +fun registerPreTycheck f = + let + val old = !pr + in + pr := (fn () => (old (); f ())) + end +fun preTycheck () = !pr () + +end + +fun badArgs (name, args) = + (print ("Invalid arguments to " ^ name ^ "\n"); + app (fn arg => Print.preface ("Argument: ", Print.p_exp arg)) args; + raise Domain) +fun badArg (func, arg, v) = + (print ("Invalid " ^ arg ^ " argument to " ^ func ^ "\n"); + Print.preface ("Argument: ", Print.p_exp v); + raise Domain) + +type 'a arg = exp -> 'a option + +fun int (EInt n, _) = SOME n + | int _ = NONE + +fun string (EString s, _) = SOME s + | string _ = NONE + +fun bool (EVar "false", _) = SOME false + | bool (EVar "true", _) = SOME true + | bool _ = NONE + +fun mapFail f [] = SOME [] + | mapFail f (h :: t) = + case f h of + NONE => NONE + | SOME h' => + case mapFail f t of + NONE => NONE + | SOME t' => SOME (h' :: t') + +fun list f (EList ls, _) = mapFail f ls + | list _ _ = NONE + +fun none func f (_, []) = (f (); + SM.empty) + | none func _ (_, es) = badArgs (func, es) + +fun one func (name, arg) f (_, [e]) = + (case arg e of + NONE => badArg (func, name, e) + | SOME v => (f v; + SM.empty)) + | one func _ _ (_, es) = badArgs (func, es) + +fun two func (name1, arg1, name2, arg2) f (_, [e1, e2]) = + (case (arg1 e1, arg2 e2) of + (NONE, _) => badArg (func, name1, e1) + | (_, NONE) => badArg (func, name2, e2) + | (SOME v1, SOME v2) => (f (v1, v2); + SM.empty)) + | two func _ _ (_, es) = badArgs (func, es) + +fun three func (name1, arg1, name2, arg2, name3, arg3) f (_, [e1, e2, e3]) = + (case (arg1 e1, arg2 e2, arg3 e3) of + (NONE, _, _) => badArg (func, name1, e1) + | (_, NONE, _) => badArg (func, name2, e2) + | (_, _, NONE) => badArg (func, name3, e3) + | (SOME v1, SOME v2, SOME v3) => (f (v1, v2, v3); + SM.empty)) + | three func _ _ (_, es) = badArgs (func, es) + +fun oneV func (name, arg) f (evs, [e]) = + (case arg e of + NONE => badArg (func, name, e) + | SOME v => (f (evs, v); + SM.empty)) + | oneV func _ _ (_, es) = badArgs (func, es) + +fun twoV func (name1, arg1, name2, arg2) f (evs, [e1, e2]) = + (case (arg1 e1, arg2 e2) of + (NONE, _) => badArg (func, name1, e1) + | (_, NONE) => badArg (func, name2, e2) + | (SOME v1, SOME v2) => (f (evs, v1, v2); + SM.empty)) + | twoV func _ _ (_, es) = badArgs (func, es) + + +fun env arg (evs, name) = + case SM.find (evs, name) of + NONE => raise Fail ("Unavailable environment variable " ^ name) + | SOME e => + case arg e of + NONE => raise Fail ("Bad format for environment variable " ^ name) + | SOME v => v + +fun type_one func arg f = + registerType (func, fn e => + case arg e of + NONE => false + | SOME v => f v) + +fun action_none name f = registerAction (name, none name f) +fun action_one name args f = registerAction (name, one name args f) +fun action_two name args f = registerAction (name, two name args f) +fun action_three name args f = registerAction (name, three name args f) + +fun actionV_none name f = registerAction (name, fn (env, _) => (f env; env)) +fun actionV_one name args f = registerAction (name, oneV name args f) +fun actionV_two name args f = registerAction (name, twoV name args f) + +fun container_none name (f, g) = registerContainer (name, none name f, g) +fun container_one name args (f, g) = registerContainer (name, one name args f, g) + +fun containerV_one name args (f, g) = registerContainer (name, oneV name args f, g) + +type env = SS.set * (typ * exp option) SM.map * SS.set +val empty : env = (SS.empty, SM.empty, SS.empty) + +fun lookupType (ts, _, _) name = SS.member (ts, name) +fun lookupVal (_, vs, _) name = case SM.find (vs, name) of NONE => NONE | SOME (t, _) => SOME t -fun lookupEquation (_, vs) name = +fun lookupEquation (_, vs, _) name = case SM.find (vs, name) of NONE => NONE | SOME (_, eqo) => eqo +fun lookupContext (_, _, cs) name = SS.member (cs, name) + +fun bindType (ts, vs, cs) name = (SS.add (ts, name), vs, cs) +fun bindVal (ts, vs, cs) (name, t, eqo) = (ts, SM.insert (vs, name, (t, eqo)), cs) +fun bindContext (ts, vs, cs) name = (ts, vs, SS.add (cs, name)) -fun bindType (ts, vs) name = (SS.add (ts, name), vs) -fun bindVal (ts, vs) (name, t, eqo) = (ts, SM.insert (vs, name, (t, eqo))) +fun types (ts, _, _) = ts +fun vals (_, vs, _) = SM.foldli (fn (name, _, vs) => SS.add (vs, name)) SS.empty vs +fun contexts (_, _, cs) = cs end