X-Git-Url: https://git.hcoop.net/hcoop/domtool2.git/blobdiff_plain/12adf55a902b1d9bde677e4636530e5753857e05..3f07a40e5a17c2bce4d90e1a154f8a73d476aaaa:/src/env.sml

diff --git a/src/env.sml b/src/env.sml
index db92e6e..1a93a38 100644
--- a/src/env.sml
+++ b/src/env.sml
@@ -100,6 +100,10 @@ fun int (EInt n, _) = SOME n
 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
@@ -131,6 +135,14 @@ fun two func (name1, arg1, name2, arg2) f (_, [e1, e2]) =
 				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
@@ -165,6 +177,7 @@ fun type_one func arg f =
 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)