Transfer: Changed transfer program file extension from .tr to .tra to avoid collision with Troff file extension.

1 files changed, 56 insertions, 0 deletions

diff --git a/transfer/examples/aggregation/aggregate.tra b/transfer/examples/aggregation/aggregate.tra
new file mode 100644
index 000000000..b71ccfef2
--- /dev/null
+++ b/transfer/examples/aggregation/aggregate.tra
@@ -0,0 +1,56 @@
+import prelude
+import tree
+
+
+-- aggreg specialized for Tree S
+aggregS : Tree S -> Tree S
+aggregS = aggreg S
+
+-- For now, here's what we have to do:
+aggreg : (A : Type) -> Tree A -> Tree A
+aggreg _ t = 
+  case t of
+      ConjS c s1 s2 -> 
+	case (aggreg ? s1, aggreg ? s2) of
+	     (Pred np1 vp1, Pred np2 vp2) | eq NP (eq_Tree NP) np1 np2 -> 
+			Pred np1 (ConjVP c vp1 vp2)
+             (Pred np1 vp1, Pred np2 vp2) | eq VP (eq_Tree VP) vp1 vp2 -> 
+	        	Pred (ConjNP c np1 np2) vp1
+	     (s1',s2') -> ConjS c s1' s2'
+      _ -> composOp ? ? compos_Tree ? aggreg t
+
+
+
+
+
+{-
+-- When the Transfer compiler gets meta variable inference,
+-- we can write this:
+aggreg : (A : Type) -> Tree A -> Tree A
+aggreg _ t = 
+  case t of
+      ConjS c s1 s2 -> 
+	case (aggreg ? s1, aggreg ? s2) of
+		(Pred np1 vp1, Pred np2 vp2) | np1 == np2 -> 
+			Pred np1 (ConjVP c vp1 vp2)
+                (Pred np1 vp1, Pred np2 vp2) | vp1 == vp2 -> 
+	        	Pred (ConjNP c np1 np2) vp1
+		(s1',s2') -> ConjS c s1' s2'
+      _ -> composOp ? ? ? ? aggreg t
+-}
+
+
+{-
+-- If we added idden arguments, we could write something like this:
+aggreg : (A : Type) => Tree A -> Tree A
+aggreg t = 
+  case t of
+      ConjS c s1 s2 -> 
+	case (aggreg s1, aggreg s2) of
+		(Pred np1 vp1, Pred np2 vp2) | np1 == np2 -> 
+			Pred np1 (ConjVP c vp1 vp2)
+                (Pred np1 vp1, Pred np2 vp2) | vp1 == vp2 -> 
+	        	Pred (ConjNP c np1 np2) vp1
+		(s1',s2') -> ConjS c s1' s2'
+      _ -> composOp aggreg t
+-}