X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;ds=sidebyside;f=src%2Fedu%2Fberkeley%2Fsbp%2Fmeta%2FMetaGrammarBindings.java;h=c7952b0beebb46e4d1aa80d0c5ef7a2cd5cbae55;hb=0dd3f65037405b4a9dd03d1825b30a6557433892;hp=9ccf8a8e8e515f588147a33511a827b9dc49de65;hpb=11fb48ff93c4fad499e4110e4aa8883357963f6e;p=sbp.git

diff --git a/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java b/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java
index 9ccf8a8..c7952b0 100644
--- a/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java
+++ b/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java
@@ -85,12 +85,20 @@ public class MetaGrammarBindings {
         }
     }
 
-    public static @bind.as("#import") GrammarNode poundimport(String fileName) {
-        System.err.println("#import " + fileName);
+    public static @bind.as("#import") GrammarNode poundimport(String fileName, String as) {
+        if (as==null) as = "";
+        else if ("".equals(as)) { }
+        else as = as +".";
+        
+        System.err.println("#import " + fileName + " as " + as);
         try {
             Tree t = new CharParser(MetaGrammar.make()).parse(new FileInputStream(fileName)).expand1();
             Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
-            return (MetaGrammarBindings.GrammarNode)red.invoke(t);
+            String oldprefix = prefix;
+            prefix = as;
+            GrammarNode gn = (GrammarNode)red.invoke(t);
+            prefix = oldprefix;
+            return gn;
         } catch (Exception e) {
             e.printStackTrace();
             throw new RuntimeException(e);
@@ -209,14 +217,14 @@ public class MetaGrammarBindings {
         }
         public Seq(ElementNode e) { this(new ElementNode[] { e }); }
         public Seq(ElementNode[] elements) { this.elements = elements; }
-        public Seq tag(String tag) { this.tag = tag; return this; }
+        public Seq tag(String tag) { this.tag = prefix+tag; return this; }
         public Seq follow(ElementNode follow) { this.follow = follow; return this; }
         public Seq dup() {
             Seq ret = new Seq(elements);
             ret.and.addAll(and);
             ret.not.addAll(not);
             ret.follow = follow;
-            ret.tag = tag;
+            ret.tag = prefix+tag;
             return ret;
         }
         public Seq and(Seq s) { and.add(s); s.lame = true; return this; }
@@ -241,7 +249,7 @@ public class MetaGrammarBindings {
         }
         public Sequence build0(Context cx, boolean lame, NonTerminalNode cnt) {
             boolean dropAll = lame;
-            if (tag!=null && "()".equals(tag)) dropAll = true;
+            if (tag!=null && tag.endsWith("()")) dropAll = true;
             boolean[] drops = new boolean[elements.length];
             Element[] els = new Element[elements.length];
             for(int i=0; i<elements.length; i++) {
@@ -378,8 +386,9 @@ public class MetaGrammarBindings {
     { return new Drop(e); }
 
     public static @bind.as("^")   ElementNode caret(final String s) {
+        final String thePrefix = prefix;
         return new Drop(new Constant(CharRange.string(s)) {
-                public String getOwnerTag() { return s; }
+                public String getOwnerTag() { return thePrefix+s; }
             });
     }