Add missed signature change

[hcoop/domtool2.git] / src / env.sml

diff --git a/src/env.sml b/src/env.sml
index ef710c1..8ebcaf4 100644 (file)
--- a/src/env.sml
+++ b/src/env.sml
@@ -149,6 +149,16 @@ fun three func (name1, arg1, name2, arg2, name3, arg3) f (_, [e1, e2, e3]) =
                                         SM.empty))
   | three func _ _ (_, es) = badArgs (func, es)
 
+fun four func (name1, arg1, name2, arg2, name3, arg3, name4, arg4) f (_, [e1, e2, e3, e4]) =
+    (case (arg1 e1, arg2 e2, arg3 e3, arg4 e4) of
+        (NONE, _, _, _) => badArg (func, name1, e1)
+       | (_, NONE, _, _) => badArg (func, name2, e2)
+       | (_, _, NONE, _) => badArg (func, name3, e3)
+       | (_, _, _, NONE) => badArg (func, name4, e4)
+       | (SOME v1, SOME v2, SOME v3, SOME v4) => (f (v1, v2, v3, v4);
+                                                 SM.empty))
+  | four func _ _ (_, es) = badArgs (func, es)
+
 fun noneV func f (evs, []) = (f evs;
                              SM.empty)
   | noneV func _ (_, es) = badArgs (func, es)
@@ -189,6 +199,7 @@ 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 action_four name args f = registerAction (name, four 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)