checkpoint

[sbp.git] / src / edu / berkeley / sbp / meta / MetaGrammarBindings.java

diff --git a/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java b/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java
index 9dc7ab3..d33758c 100644 (file)
--- a/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java
+++ b/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java
@@ -15,7 +15,13 @@ public class MetaGrammarBindings {
     /** A grammar (a set of nonterminals) */
     public static class GrammarNode extends HashMap<String,NonTerminalNode> {
         public @bind.as("Grammar") GrammarNode(NonTerminalNode[] nonterminals) {
-            for(NonTerminalNode nt : nonterminals) this.put(nt.name, nt); }
+            for(NonTerminalNode nt : nonterminals) {
+                if (nt==null) continue;
+                if (this.get(nt.name)!=null)
+                    throw new RuntimeException("duplicate definition of nonterminal \""+nt.name+"\"");
+                this.put(nt.name, nt);
+            }
+        }
         public String toString() {
             String ret = "[ ";
             for(NonTerminalNode nt : values()) ret += nt + ", ";
@@ -57,6 +63,11 @@ public class MetaGrammarBindings {
         }
     }
 
+    public static @bind.as("#import") NonTerminalNode poundimport(String fileName) {
+        System.err.println("#import " + fileName);
+        return null;
+    }
+
     public static class NonTerminalNode extends UnionNode {
         public boolean rep;
         public String  name = null;
@@ -197,11 +208,9 @@ public class MetaGrammarBindings {
         public Sequence build0(Context cx, boolean lame, NonTerminalNode cnt) {
             boolean dropAll = lame;
             if (tag!=null && "()".equals(tag)) dropAll = true;
-            Object[] labels = new Object[elements.length];
             boolean[] drops = new boolean[elements.length];
             Element[] els = new Element[elements.length];
             for(int i=0; i<elements.length; i++) {
-                labels[i] = elements[i].getLabel();
                 drops[i]  = elements[i].drop();
                 els[i] = elements[i].build(cx, cnt);
                 if (elements[i].getOwnerTag() != null)
@@ -210,7 +219,7 @@ public class MetaGrammarBindings {
             Sequence ret = null;
             if (dropAll)     ret = Sequence.drop(els, false);
             else {
-                ret = cx.rm.tryResolveTag(tag, cnt==null?null:cnt.name, els, labels, drops);
+                ret = cx.rm.tryResolveTag(tag, cnt==null?null:cnt.name, els, drops);
                 if (ret == null) {
                     int idx = -1;
                     for(int i=0; i<els.length; i++)
@@ -329,7 +338,7 @@ public class MetaGrammarBindings {
     public static @bind.as("~")   ElementNode tilde(final ElementNode e) {
         return new PostProcess(e) {
                 public Element postProcess(Element e) {
-                    return infer((Topology<Character>)Atom.toAtom(e).complement()); 
+                    return infer((Topology<Character>)Atom.toAtom(e).complement().minus(CharRange.braces));
                 } }; }
 
     public static @bind.as("Word")        String word(String s) { return s; }
@@ -363,7 +372,7 @@ public class MetaGrammarBindings {
         public Context(Tree t, GrammarBindingResolver rm) {
             this.rm = rm;
             Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
-            this.grammar = (GrammarNode)red.invoke(t.children());
+            this.grammar = (GrammarNode)red.invoke(t);
         }
         public Union peek(String name) { return map.get(name); }
         public void  put(String name, Union u) { map.put(name, u); }