checkpoint

[sbp.git] / src / edu / berkeley / sbp / Parser.java

diff --git a/src/edu/berkeley/sbp/Parser.java b/src/edu/berkeley/sbp/Parser.java
index 90f86f2..f087a05 100644 (file)
--- a/src/edu/berkeley/sbp/Parser.java
+++ b/src/edu/berkeley/sbp/Parser.java
@@ -316,6 +316,19 @@ public abstract class Parser<T extends Token, R> {
                 return ret;
             }
 
+            public Forest reduce(GSS.Phase.Node parent, GSS.Phase.Node onlychild) {
+                int pos = numPop-1;
+                if (pos>=0) holder[pos] = parent.pending();
+                Forest rex = null;
+                if (pos==0) {
+                    if (rex==null) {
+                        System.arraycopy(holder, 0, position.holder, 0, holder.length);
+                        rex = position.rewrite(parent.phase().getLocation());
+                    }
+                }
+                return reduce(onlychild, pos-1, rex, null, parent.phase());
+            }
+
             private Forest zero = null;
             public Forest zero() {
                 if (zero != null) return zero;