1 files changed, 16 insertions, 0 deletions
diff --git a/test/subback.awk b/test/subback.awk
new file mode 100644
index 00000000..d91513c1
--- /dev/null
+++ b/test/subback.awk
@@ -0,0 +1,16 @@
+BEGIN {
+    A[0] = "&"
+    for(i=1;i<=11;i++) {
+	A[i] = "\\" A[i-1]
+    }
+## A[] holds  & \& \\& \\\& \\\\& ...
+}
+
+{
+    for(i=0; i <= 11 ; i++) {
+        x = $0 
+        sub(/B/, A[i], x)
+	y = gensub(/B/, A[i], "1", $0)
+	print i, x, y
+    }
+}