X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fsbp%2Fmeta%2FGrammar.java;h=857c1762fb3bcf3900cceb730bddbb577e45c26b;hb=972303162555284f8066047d3caead8df139afd4;hp=693a7bad399c18f659c492975e67cd72fc42d30d;hpb=0632bba5da482b2c39e6959e449259bd6725c213;p=sbp.git

diff --git a/src/edu/berkeley/sbp/meta/Grammar.java b/src/edu/berkeley/sbp/meta/Grammar.java
index 693a7ba..857c176 100644
--- a/src/edu/berkeley/sbp/meta/Grammar.java
+++ b/src/edu/berkeley/sbp/meta/Grammar.java
@@ -1,3 +1,5 @@
+// Copyright 2006 all rights reserved; see LICENSE file for BSD-style license
+
 package edu.berkeley.sbp.meta;
 import edu.berkeley.sbp.util.*;
 import edu.berkeley.sbp.*;
@@ -12,26 +14,24 @@ import java.io.*;
 public class Grammar {
 
     /**
-     *  Create a grammar from a parse tree.
-     * 
-     *  @param t a tree produced by parsing a grammar using the metagrammar
-     *  @param s the name of the "start symbol"
-     */
-    public static Union create(Tree t, String s) {
-        return create(t, s, new AnnotationGrammarBindingResolver(MetaGrammarBindings.class));
-    }
-
-    /**
      *  Create a grammar from a parse tree and binding resolver
      * 
      *  @param t   a tree produced by parsing a grammar using the metagrammar
      *  @param s   the name of the "start symbol"
      *  @param gbr a GrammarBindingResolver that resolves grammatical reductions into tree-node-heads
      */
-    public static Union create(Tree t, String s, GrammarBindingResolver gbr) {
-        Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
+    public static Union create(Tree t, String s, Grammar.Bindings gbr) {
+        TreeFunctor<Object,Object> red = (TreeFunctor<Object,Object>)t.head();
         MetaGrammarBindings.GrammarNode g = (MetaGrammarBindings.GrammarNode)red.invoke(t.children());
         return g.build(s, gbr);
     }
+
+    public static class Bindings {
+        public Object repeatTag()                   { return null; }
+        public Sequence createSequence(Production p) {
+            if (p.tag==null) return null;
+            return Sequence.create(p.tag, p.elements, p.drops, false);
+        }
+    }
     
 }