polish the PGF API and make Expr and Type abstract types. Tree is a type synonym of Expr

2009-09-11 13:45:34 +00:00
parent 28a7c4b5c7
commit 1cdf171251
31 changed files with 205 additions and 159 deletions
@@ -5,6 +5,7 @@ module GF.Command.TreeOperations (

 import GF.Compile.TypeCheck
 import PGF
+import PGF.Data

 import Data.List