X-Git-Url: http://git.megacz.com/?p=sbp.git;a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fsbp%2Fmisc%2FMetaGrammar.java;h=092710b7bc039fd2c86e639123cc02fe6163f348;hp=53aeff098f231c99e8310f3a090a4b5c3f8719fe;hb=804f5815acb68f318ef9ca35f6f13b4d5dd819ad;hpb=3485f1c89ae352b5aa1b65cdfa5f628cd3859601

diff --git a/src/edu/berkeley/sbp/misc/MetaGrammar.java b/src/edu/berkeley/sbp/misc/MetaGrammar.java
index 53aeff0..092710b 100644
--- a/src/edu/berkeley/sbp/misc/MetaGrammar.java
+++ b/src/edu/berkeley/sbp/misc/MetaGrammar.java
@@ -22,19 +22,22 @@ public class MetaGrammar extends ReflectiveWalker {
 
     private static final Union SELF = new Union("()");
 
-    public static Union epsilon = new Union("()");
-    static { epsilon.add(Sequence.empty); }
-
     ////////////////////////////////////////////////////////////////////////////////
 
     private Union g;
     private HashMap<String,Union> nt;
     private int anon = 0;
-    private Element dws;
     private String startSymbol;
+    private boolean strings;
+
+    private Element  set(Range.Set r) { if (strings) throw new Error(); return CharToken.set(r); }
+    private Element  string(String s) { return strings ? StringToken.string(s) : CharToken.string(s); }
+    private Atom     leftBrace()      { return strings ? StringToken.leftBrace : CharToken.leftBrace; }
+    private Atom     rightBrace()     { return strings ? StringToken.rightBrace : CharToken.rightBrace; }
 
-    public MetaGrammar() { this("s"); }
-    public MetaGrammar(String s) { done(s); }
+    public MetaGrammar() { this("s", false); }
+    public MetaGrammar(String s) { this(s, false); }
+    public MetaGrammar(String s, boolean strings) { this.strings = strings; done(s); }
     public Union done() { return done("s"); }
     public Union done(String str) {
         Union ret = g;
@@ -43,22 +46,17 @@ public class MetaGrammar extends ReflectiveWalker {
         nt = new HashMap<String,Union>();
         dropAll = new HashSet<Element>();
         nt.put(str, g);
-        this.dws = Repeat.maximal(Repeat.many0(nonTerminal("w")));
         return ret;
     }
-    // MetaGrammar //////////////////////////////////////////////////////////////////////////////
 
 
-    public PreSequence _amp_(PreSequence p, Object[] o)        { return p.and(new PreSequence(o, null, true).buildSequence(null, true, false)); }
-    public PreSequence _amp__tilde_(PreSequence p, Object[] o) { return p.not(new PreSequence(o, null, true).buildSequence(null, true, false)); }
-    public PreSequence rewrite(Object[] o)                                            { return new PreSequence(o, null); }
-    public PreSequence _equals__greater_(Object[] o, String s)                        { return new PreSequence(o, s); }
-    public Object      _star_(Element r)                                              { return Repeat.many0(r); }
-    public Element     epsilon(Object o, Object b)                                    { return epsilon; }
+    // MetaGrammar //////////////////////////////////////////////////////////////////////////////
+
+    public PreSequence _amp_(PreSequence p, Object[] o)        { return p.and(new PreSequence(o, null).buildSequence(null, true, false, true)); }
+    public PreSequence _amp__tilde_(PreSequence p, Object[] o) { return p.not(new PreSequence(o, null).buildSequence(null, true, false, true)); }
+    public Element     epsilon(Object o, Object b)                                    { return Union.epsilon; }
+    public Object      _leftparen__rightparen_(Object o)                              { return Union.epsilon; }
     public Element     _rightparen_(Object e)                                         { return SELF; }
-    public Element     _bang_(Element r)                                              { return r; }
-    public Object      _caret_(String s)                                              { return new MyLift(s); }
-    public Object      _leftparen__rightparen_()                                      { return epsilon; }
     public Union       nonTerminal(String s)                                          { return nonTerminal(s, null, false, false); }
     public Union       _colon__colon__equals_(String s, PreSequence[][] p)            { return nonTerminal(s, p, false, false); }
     public Union       _bang__colon__colon__equals_(String s, PreSequence[][] p)      { return nonTerminal(s, p, false, true); }
@@ -75,7 +73,7 @@ public class MetaGrammar extends ReflectiveWalker {
             HashSet<Sequence> temp = new HashSet<Sequence>();
             for(PreSequence pre : s[i]) {
                 pre.not.addAll(seqs);
-                Sequence seq = pre.buildSequence(n, false, dropAll);
+                Sequence seq = pre.buildSequence(n, false, dropAll, false);
                 temp.add(seq);
                 n.add(seq);
             }
@@ -84,98 +82,144 @@ public class MetaGrammar extends ReflectiveWalker {
         return n;
     }
 
-
     public Object   _backslash__leftbrace_(String s)      { return SELF; }
-    public Object   _leftbrace_(String s)                 { return SELF; }
-    public Object   _plus_(final Element r) { return Repeat.many1(r); }
-    public Object[] _slash_(Object[] o, Object sep) {
-        if (o.length <= 1) return o;
-        Object[] ret = new Object[o.length * 2 - 1];
-        for(int i=0; i<o.length; i++) {
-            Object oi = o[i];
-            ret[i*2]   = oi;
-            if (i*2+1<ret.length) ret[i*2+1] = new MyDrop(sep);
-        }
+    public Object   _leftbrace_(PreSequence p) {
+        return nonTerminal("braced"+(anon++),
+                           new PreSequence[][] {
+                               new PreSequence[] {
+                                   new PreSequence(new Element[] { leftBrace(),
+                                                                   p.buildUnion(),
+                                                                   rightBrace() })
+                               }
+                           },
+                           false,
+                           false);
+    }
+
+    public PreSequence rewrite(Object[] o)                     { return new PreSequence(o, null); }
+
+    public PreSequence seqx(PreSequence p, String tag) { return _equals__greater_(p, tag); }
+    public PreSequence _equals__greater_(PreSequence p, String tag) {
+        p.tag = tag;
+        return p;
+    }
+
+    public PreSequence ps(Object[] o) { return new PreSequence(o); }
+    public PreSequence ps2(Object[] o1, String s, Object[] o2) {
+        if (o1==null) o1 = new Object[0];
+        if (o2==null) o2 = new Object[0];
+        Object[] o3 = new Object[o1.length + o2.length + 1];
+        System.arraycopy(o1, 0, o3, 0, o1.length);
+        Element es = string(s);
+        //dropAll.add(es);
+        o3[o1.length] = es;
+        System.arraycopy(o2, 0, o3, o1.length+1, o2.length);
+        PreSequence ret = new PreSequence(o3, s);
+        ret.drops[o1.length] = o3.length>1;
         return ret;
     }
+    public PreSequence _slash_(PreSequence p, Object sep) { return p.sparse(sep); }
 
+    public Object      _star_(Element r)                    { return Repeat.many0(r); }
+    public Object   _plus_(final Element r)                 { return Repeat.many1(r); }
     public Object _plus__slash_(final Element r, Element s) { return Repeat.many1(r, s); }
     public Object _star__slash_(final Element r, Element s) { return Repeat.many0(r, s); }
-    public Object _star__star_(final Element r) { return Repeat.maximal(Repeat.many0(r)); }
-    public Object _plus__plus_(final Element r) { return Repeat.maximal(Repeat.many1(r)); }
-    public Element _question_(final Element r) { return Repeat.maybe(r); }
+    public Object _star__star_(final Element r)             { return Repeat.maximal(Repeat.many0(r)); }
+    public Object _plus__plus_(final Element r)             { return Repeat.maximal(Repeat.many1(r)); }
+    public Element _question_(final Element r)              { return Repeat.maybe(r); }
+
     public MetaGrammar gram(Object o, MetaGrammar g, Object o2) { return g; }
     public MetaGrammar  grammar(Object[] o) { return this; }
     public MetaGrammar grammar(Object o, Union[] u, Object x) { return this; }
     public char    _backslash_n() { return '\n'; }
     public char    _backslash_r() { return '\r'; }
-    public Object    literal(String s) { return new MyDrop(CharToken.string(s)); }
+    public Element    literal(String s) { Element ret = string(s); dropAll.add(ret); return ret; }
     public Range     _minus_(char a, char b) { return new Range(a, b); }
-    public Element   _leftbracket_       (Range[] rr) { return ranges(null, rr); }
-    public Element   _leftbracket__tilde_(Range[] rr) { return ranges("~",  rr); }
     public Range     range(char a)         { return new Range(a, a); }
-    public Element   ranges(Object o, Range[] rr) {
-        Range.Set ret = !"~".equals(o+"") ? new Range.Set() : new Range.Set(new Range(true, true));
+    public Element   _leftbracket_       (Range[] rr) { return ranges(true, rr); }
+    public Element   _leftbracket__tilde_(Range[] rr) { return ranges(false,  rr); }
+    public Element   ranges(boolean positive, Range[] rr) {
+        Range.Set ret = positive ? new Range.Set() : new Range.Set(new Range(true, true));
         if (rr != null)
             for(Range r : rr)
-                if (!"~".equals(o+"")) ret.add(r);
-                else                   ret.remove(r);
-        return CharToken.set(ret);
+                if (positive) ret.add(r);
+                else          ret.remove(r);
+        return set(ret);
     }
 
-    public static class MyLift {
-        public final String s;
-        public MyLift(String s) { this.s = s; }
-    }
-    public static class MyDrop {
-        public final Object o;
-        public MyDrop(Object o) { this.o = o; }
-    }
-
-    public static class PreSequence {
-        public PreSequence not(Sequence s) { not.add(s); return this; }
-        public PreSequence and(Sequence s) { and.add(s); return this; }
+    public class PreSequence {
         public final HashSet<Sequence> and  = new HashSet<Sequence>();
         public final HashSet<Sequence> not  = new HashSet<Sequence>();
         public /*final*/ String tag;
         public final Object[] o;
-        public final boolean keeper;
 
-        public PreSequence(Object[] o, String tag) { this(o, tag, false); }
-        public PreSequence(Object[] o, String tag, boolean keeper) { this.o = o; this.tag = tag; this.keeper = keeper; }
+        public PreSequence sparse(Object e) {
+            Object[] ret;
+            boolean[] drops;
+            if (o.length <= 1) {
+                ret = o;
+                drops = new boolean[this.drops.length];
+                System.arraycopy(this.drops, 0, drops, 0, this.drops.length);
+            } else {
+                ret = new Object[o.length * 2 - 1];
+                drops = new boolean[o.length * 2 - 1];
+                for(int i=0; i<o.length; i++) {
+                    Object oi = o[i];
+                    ret[i*2]   = oi;
+                    drops[i*2] = this.drops[i];
+                    if (i*2+1<ret.length) {
+                        ret[i*2+1] = e;
+                        drops[i*2+1] = true;
+                    }
+                }
+            }
+            PreSequence p = new PreSequence(ret, tag, drops);
+            p.not.addAll(not);
+            p.and.addAll(and);
+            return p;
+        }
+
+        public PreSequence not(Sequence s) { not.add(s); return this; }
+        public PreSequence and(Sequence s) { and.add(s); return this; }
+
         boolean[] drops = null;
+        public PreSequence(Object o) { this(new Object[] { o }, null); }
+        public PreSequence(Object[] o) { this(o, null); }
+        public PreSequence(Object[] o, String tag) { this(o, tag, null); }
+        public PreSequence(Object[] o, String tag, boolean[] drops) {
+            this.o = o;
+            this.tag = tag;
+            this.drops = drops==null ? new boolean[o.length] : drops;
+        }
+
         public Union    buildUnion() {
             Union u = new Union("???");
             u.add(buildSequence(u));
             return u;
         }
-        public Sequence buildSequence(Union u) { return buildSequence(u, false, false); }
-        public Sequence buildSequence(Union u, boolean lame, boolean dropAll) {
+        public Sequence buildSequence(Union u) { return buildSequence(u, false, false, false); }
+        public Sequence buildSequence(Union u, boolean lame, boolean dropAll, boolean keeper) {
             for(Sequence s : and) u.add(s);
             for(Sequence s : not) u.add(s);
             HashSet<Sequence> set = new HashSet<Sequence>();
             Element[] o2 = o==null ? new Element[0] : new Element[o.length];
+            int nonDrop = 0;
             if (o != null) {
-                drops = new boolean[o.length];
                 int j = 0;
                 for(int i=0; i<o.length; i++) {
                     Object oi = o[i];
-                    if (oi instanceof MyDrop)      { oi = ((MyDrop)oi).o; drops[j] = true; }
                     if (oi==SELF)                    o2[j] = u.new Subset("(("+u+"))", set);
-                    else if (oi instanceof MyLift) { o2[j] = CharToken.string(tag = ((MyLift)oi).s); drops[j] = true; }
                     else                             o2[j] = (Element)oi;
+
                     if (MetaGrammar.dropAll.contains(o2[j])) drops[j] = true;
+                    nonDrop += drops[j] ? 0 : 1;
                     o2[j] = o2[j];
                     j++;
                 }
             }
             Element[] expansion = o2;
-            boolean keeper = this.keeper;
             Sequence ret = dropAll || lame || keeper ? Sequence.drop(expansion, and, not, lame) : null;
-            if (ret==null && tag!=null) {
-                for(int i=0; i<expansion.length; i++) expansion[i] = expansion[i];
-                ret = Sequence.rewritingSequence(tag, expansion, drops, and, not);
-            }
+            if (ret==null && tag!=null) ret = Sequence.rewritingSequence(tag, expansion, drops, and, not);
             if (ret==null) {
                 int idx = -1;
                 for(int i=0; i<expansion.length; i++) {
@@ -228,10 +272,20 @@ public class MetaGrammar extends ReflectiveWalker {
 
 
 
+
+
+
+
+
+
+
+
+
+
         // DO NOT EDIT STUFF BELOW: IT IS AUTOMATICALLY GENERATED
 new Tree(null, "gram", new Tree[] { new Tree(null, null, new Tree[] { }),
         new Tree(null, "grammar", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "s", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "=>", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "=>", new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
         new Tree(null, "s", new Tree[] { })})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "g", new Tree[] { }),
         new Tree(null, "r", new Tree[] { }),
@@ -241,14 +295,14 @@ new Tree(null, "gram", new Tree[] { new Tree(null, null, new Tree[] { }),
         new Tree(null, "a", new Tree[] { }),
         new Tree(null, "r", new Tree[] { })})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})}),
+        new Tree(null, "s", new Tree[] { })})})})}),
         new Tree(null, null, new Tree[] { new Tree(null, "g", new Tree[] { }),
         new Tree(null, "r", new Tree[] { }),
         new Tree(null, "a", new Tree[] { }),
         new Tree(null, "m", new Tree[] { })})})})})}),
         new Tree(null, "!::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
         new Tree(null, "s", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "**", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { })})})})})})})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "**", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { })})})})})})})})}),
         new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "g", new Tree[] { }),
         new Tree(null, "r", new Tree[] { }),
         new Tree(null, "a", new Tree[] { }),
@@ -256,9 +310,9 @@ new Tree(null, "gram", new Tree[] { new Tree(null, null, new Tree[] { }),
         new Tree(null, "m", new Tree[] { }),
         new Tree(null, "a", new Tree[] { }),
         new Tree(null, "r", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "=>", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "+/", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "r", new Tree[] { })})}),
+        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "=>", new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "+/", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "r", new Tree[] { })})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})}),
+        new Tree(null, "s", new Tree[] { })})})})})}),
         new Tree(null, null, new Tree[] { new Tree(null, "g", new Tree[] { }),
         new Tree(null, "r", new Tree[] { }),
         new Tree(null, "a", new Tree[] { }),
@@ -267,14 +321,14 @@ new Tree(null, "gram", new Tree[] { new Tree(null, null, new Tree[] { }),
         new Tree(null, "a", new Tree[] { }),
         new Tree(null, "r", new Tree[] { })})})})})}),
         new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "r", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
         new Tree(null, "o", new Tree[] { }),
         new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "d", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, ":", new Tree[] { }),
+        new Tree(null, "d", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, ":", new Tree[] { }),
         new Tree(null, ":", new Tree[] { }),
-        new Tree(null, "=", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "a", new Tree[] { }),
+        new Tree(null, "=", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "a", new Tree[] { }),
         new Tree(null, "l", new Tree[] { }),
         new Tree(null, "t", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
@@ -285,18 +339,18 @@ new Tree(null, "gram", new Tree[] { new Tree(null, null, new Tree[] { }),
         new Tree(null, "i", new Tree[] { }),
         new Tree(null, "v", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
         new Tree(null, "s", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })})})}),
+        new Tree(null, "/", new Tree[] { new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
         new Tree(null, "o", new Tree[] { }),
         new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "d", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "!", new Tree[] { }),
+        new Tree(null, "d", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "!", new Tree[] { }),
         new Tree(null, ":", new Tree[] { }),
         new Tree(null, ":", new Tree[] { }),
-        new Tree(null, "=", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "a", new Tree[] { }),
+        new Tree(null, "=", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "a", new Tree[] { }),
         new Tree(null, "l", new Tree[] { }),
         new Tree(null, "t", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
@@ -307,9 +361,9 @@ new Tree(null, "gram", new Tree[] { new Tree(null, null, new Tree[] { }),
         new Tree(null, "i", new Tree[] { }),
         new Tree(null, "v", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})}),
+        new Tree(null, "s", new Tree[] { })})})})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})})})})}),
+        new Tree(null, "s", new Tree[] { })})})})})})}),
         new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "a", new Tree[] { }),
         new Tree(null, "l", new Tree[] { }),
         new Tree(null, "t", new Tree[] { }),
@@ -322,26 +376,7 @@ new Tree(null, "gram", new Tree[] { new Tree(null, null, new Tree[] { }),
         new Tree(null, "v", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
         new Tree(null, "s", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "+/", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "q", new Tree[] { }),
-        new Tree(null, "u", new Tree[] { }),
-        new Tree(null, "i", new Tree[] { }),
-        new Tree(null, "A", new Tree[] { }),
-        new Tree(null, "l", new Tree[] { }),
-        new Tree(null, "t", new Tree[] { })})}),
-        new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})}),
-        new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, ">", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})})})})})})})})})})}),
-        new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "q", new Tree[] { }),
-        new Tree(null, "u", new Tree[] { }),
-        new Tree(null, "i", new Tree[] { }),
-        new Tree(null, "A", new Tree[] { }),
-        new Tree(null, "l", new Tree[] { }),
-        new Tree(null, "t", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "+/", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "c", new Tree[] { }),
+        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "+/", new Tree[] { new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "+/", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "c", new Tree[] { }),
         new Tree(null, "o", new Tree[] { }),
         new Tree(null, "n", new Tree[] { }),
         new Tree(null, "j", new Tree[] { }),
@@ -350,41 +385,16 @@ new Tree(null, "gram", new Tree[] { new Tree(null, null, new Tree[] { }),
         new Tree(null, "c", new Tree[] { }),
         new Tree(null, "t", new Tree[] { }),
         new Tree(null, "s", new Tree[] { })})}),
-        new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
         new Tree(null, "s", new Tree[] { })})}),
         new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "|", new Tree[] { })})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
         new Tree(null, "s", new Tree[] { })})})})})})})})})})})})})}),
-        new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "s", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "q", new Tree[] { }),
-        new Tree(null, "u", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "n", new Tree[] { }),
-        new Tree(null, "c", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})})}),
-        new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
         new Tree(null, "s", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "/", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})})})})})})}),
-        new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "*/", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
-        new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "**", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { })})})})})})})})})})})})})})}),
-        new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "s", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "/", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})})}),
+        new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, ">", new Tree[] { })})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})})})})}),
+        new Tree(null, "s", new Tree[] { })})})})})})})})})})})})})}),
         new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "c", new Tree[] { }),
         new Tree(null, "o", new Tree[] { }),
         new Tree(null, "n", new Tree[] { }),
@@ -394,123 +404,116 @@ new Tree(null, "gram", new Tree[] { new Tree(null, null, new Tree[] { }),
         new Tree(null, "c", new Tree[] { }),
         new Tree(null, "t", new Tree[] { }),
         new Tree(null, "s", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "i", new Tree[] { }),
-        new Tree(null, "t", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "i", new Tree[] { }),
-        new Tree(null, "t", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "&", new Tree[] { })})}),
-        new Tree(null, "*/", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "i", new Tree[] { }),
-        new Tree(null, "t", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "&", new Tree[] { }),
-        new Tree(null, "~", new Tree[] { })})}),
-        new Tree(null, "*/", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})})})})}),
-        new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "i", new Tree[] { }),
-        new Tree(null, "t", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "=>", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "s", new Tree[] { }),
+        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "s", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
         new Tree(null, "q", new Tree[] { }),
         new Tree(null, "u", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
         new Tree(null, "n", new Tree[] { }),
         new Tree(null, "c", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { })})})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})}),
-        new Tree(null, null, new Tree[] { new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "i", new Tree[] { }),
-        new Tree(null, "t", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { })})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "s", new Tree[] { }),
+        new Tree(null, "e", new Tree[] { })})})})}),
+        new Tree(null, "/", new Tree[] { new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "s", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
         new Tree(null, "q", new Tree[] { }),
         new Tree(null, "u", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
         new Tree(null, "n", new Tree[] { }),
         new Tree(null, "c", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "=", new Tree[] { }),
-        new Tree(null, ">", new Tree[] { })})}),
+        new Tree(null, "e", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "&", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, "*/", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "o", new Tree[] { }),
-        new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "d", new Tree[] { })})})}),
+        new Tree(null, "s", new Tree[] { })})})})})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "s", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })})})}),
+        new Tree(null, "/", new Tree[] { new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "s", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
         new Tree(null, "q", new Tree[] { }),
         new Tree(null, "u", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
         new Tree(null, "n", new Tree[] { }),
         new Tree(null, "c", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "=", new Tree[] { }),
-        new Tree(null, ">", new Tree[] { })})}),
+        new Tree(null, "e", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "&", new Tree[] { }),
+        new Tree(null, "~", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, "*/", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
+        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })})})})})}),
+        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })})})})})})}),
+        new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "p", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "=>", new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "*/", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
+        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })})})})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "p", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })})}),
+        new Tree(null, "=>", new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "?", new Tree[] { new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "+/", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
+        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })})})}),
+        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })})})})})})})})}),
+        new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "^", new Tree[] { })})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "q", new Tree[] { }),
         new Tree(null, "u", new Tree[] { }),
         new Tree(null, "o", new Tree[] { }),
         new Tree(null, "t", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "d", new Tree[] { })})})}),
+        new Tree(null, "d", new Tree[] { })})}),
+        new Tree(null, "?", new Tree[] { new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })})}),
+        new Tree(null, "+/", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})}),
-        new Tree(null, "=>", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "s", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })})})})})})})})})})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "p", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { }),
+        new Tree(null, "2", new Tree[] { })})})})})}),
+        new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "p", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { }),
+        new Tree(null, "x", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "p", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })})})})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "p", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "/", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})})})}),
+        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })})})})})})}),
+        new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "s", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
         new Tree(null, "q", new Tree[] { }),
         new Tree(null, "u", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
         new Tree(null, "n", new Tree[] { }),
         new Tree(null, "c", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { })})}),
-        new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "=", new Tree[] { }),
-        new Tree(null, ">", new Tree[] { })})}),
-        new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "(", new Tree[] { }),
-        new Tree(null, ")", new Tree[] { })})})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})}),
-        new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, "e", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "p", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { }),
+        new Tree(null, "x", new Tree[] { })})})})}),
+        new Tree(null, "/", new Tree[] { new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "p", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { }),
+        new Tree(null, "x", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "=", new Tree[] { }),
+        new Tree(null, ">", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, "o", new Tree[] { }),
         new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "a", new Tree[] { }),
-        new Tree(null, "p", new Tree[] { })})})})})}),
+        new Tree(null, "d", new Tree[] { })})})})}),
+        new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "q", new Tree[] { }),
+        new Tree(null, "u", new Tree[] { }),
+        new Tree(null, "o", new Tree[] { }),
+        new Tree(null, "t", new Tree[] { }),
+        new Tree(null, "e", new Tree[] { }),
+        new Tree(null, "d", new Tree[] { })})})})})})})})})}),
+        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })})})})})})}),
         new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
         new Tree(null, "c", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "[~", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "range", new Tree[] { new Tree(null, "-", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "[~", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "range", new Tree[] { new Tree(null, "-", new Tree[] { })}),
         new Tree(null, "range", new Tree[] { new Tree(null, "]", new Tree[] { })}),
         new Tree(null, "range", new Tree[] { new Tree(null, "\\", new Tree[] { })}),
         new Tree(null, "range", new Tree[] { new Tree(null, "~", new Tree[] { })})})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
+        new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
         new Tree(null, "s", new Tree[] { }),
         new Tree(null, "c", new Tree[] { }),
         new Tree(null, "a", new Tree[] { }),
@@ -522,23 +525,23 @@ new Tree(null, "gram", new Tree[] { new Tree(null, null, new Tree[] { }),
         new Tree(null, "n", new Tree[] { }),
         new Tree(null, "g", new Tree[] { }),
         new Tree(null, "e", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "=>", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "c", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "=>", new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
+        new Tree(null, "c", new Tree[] { })})})})}),
         new Tree(null, null, new Tree[] { new Tree(null, "r", new Tree[] { }),
         new Tree(null, "a", new Tree[] { }),
         new Tree(null, "n", new Tree[] { }),
         new Tree(null, "g", new Tree[] { }),
         new Tree(null, "e", new Tree[] { })})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "c", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "-", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
+        new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
+        new Tree(null, "c", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "-", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
         new Tree(null, "c", new Tree[] { })})})})})})})}),
         new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "=>", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "=>", new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
         new Tree(null, "o", new Tree[] { }),
         new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "d", new Tree[] { })})})}),
+        new Tree(null, "d", new Tree[] { })})})})}),
         new Tree(null, null, new Tree[] { new Tree(null, "n", new Tree[] { }),
         new Tree(null, "o", new Tree[] { }),
         new Tree(null, "n", new Tree[] { }),
@@ -550,130 +553,104 @@ new Tree(null, "gram", new Tree[] { new Tree(null, null, new Tree[] { }),
         new Tree(null, "n", new Tree[] { }),
         new Tree(null, "a", new Tree[] { }),
         new Tree(null, "l", new Tree[] { })})}),
-        new Tree(null, "=>", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "[", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "range", new Tree[] { new Tree(null, "(", new Tree[] { })})})}),
-        new Tree(null, "[", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "range", new Tree[] { new Tree(null, ")", new Tree[] { })})})})}),
-        new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "p", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { }),
-        new Tree(null, "i", new Tree[] { }),
-        new Tree(null, "l", new Tree[] { }),
+        new Tree(null, "=>", new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "q", new Tree[] { }),
+        new Tree(null, "u", new Tree[] { }),
         new Tree(null, "o", new Tree[] { }),
-        new Tree(null, "n", new Tree[] { })})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "{", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "a", new Tree[] { }),
-        new Tree(null, "l", new Tree[] { }),
+        new Tree(null, "t", new Tree[] { }),
+        new Tree(null, "e", new Tree[] { }),
+        new Tree(null, "d", new Tree[] { })})})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "l", new Tree[] { }),
+        new Tree(null, "i", new Tree[] { }),
         new Tree(null, "t", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
         new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "n", new Tree[] { }),
         new Tree(null, "a", new Tree[] { }),
-        new Tree(null, "t", new Tree[] { }),
-        new Tree(null, "i", new Tree[] { }),
-        new Tree(null, "v", new Tree[] { }),
+        new Tree(null, "l", new Tree[] { })})}),
+        new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { }),
+        new Tree(null, null, new Tree[] { new Tree(null, "(", new Tree[] { }),
+        new Tree(null, ")", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { })}),
+        new Tree(null, "/", new Tree[] { new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { }),
+        new Tree(null, null, new Tree[] { new Tree(null, "{", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "s", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})}),
-        new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "}", new Tree[] { })})})}),
+        new Tree(null, "q", new Tree[] { }),
+        new Tree(null, "u", new Tree[] { }),
+        new Tree(null, "e", new Tree[] { }),
+        new Tree(null, "n", new Tree[] { }),
+        new Tree(null, "c", new Tree[] { }),
+        new Tree(null, "e", new Tree[] { })})}),
+        new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "}", new Tree[] { })})})})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "[", new Tree[] { })})}),
-        new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "*", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "r", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })})})}),
+        new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { }),
+        new Tree(null, null, new Tree[] { new Tree(null, "[", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, "*", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "r", new Tree[] { }),
         new Tree(null, "a", new Tree[] { }),
         new Tree(null, "n", new Tree[] { }),
         new Tree(null, "g", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { })})})})})})})})}),
+        new Tree(null, "e", new Tree[] { })})})}),
         new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "]", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "[", new Tree[] { }),
-        new Tree(null, "~", new Tree[] { })})}),
-        new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "*", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "r", new Tree[] { }),
+        new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { }),
+        new Tree(null, null, new Tree[] { new Tree(null, "[", new Tree[] { }),
+        new Tree(null, "~", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, "*", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "r", new Tree[] { }),
         new Tree(null, "a", new Tree[] { }),
         new Tree(null, "n", new Tree[] { }),
         new Tree(null, "g", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { })})})})})})})})}),
+        new Tree(null, "e", new Tree[] { })})})}),
         new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "]", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "^", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "q", new Tree[] { }),
-        new Tree(null, "u", new Tree[] { }),
-        new Tree(null, "o", new Tree[] { }),
-        new Tree(null, "t", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "d", new Tree[] { })})})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "~", new Tree[] { }),
-        new Tree(null, "/", new Tree[] { }),
-        new Tree(null, "~", new Tree[] { })})})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "!", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})})}),
+        new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "`", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "#", new Tree[] { })})})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "*", new Tree[] { }),
-        new Tree(null, "*", new Tree[] { })})})})})}),
-        new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
+        new Tree(null, "s", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "*", new Tree[] { }),
+        new Tree(null, "*", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { })})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "*", new Tree[] { })})})})})})})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "*", new Tree[] { }),
-        new Tree(null, "/", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})})}),
+        new Tree(null, "s", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "*", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { })})})})})})}),
+        new Tree(null, "/", new Tree[] { new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "*", new Tree[] { }),
+        new Tree(null, "/", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})})})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
+        new Tree(null, "s", new Tree[] { })})})}),
+        new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "+", new Tree[] { }),
-        new Tree(null, "+", new Tree[] { })})})})})}),
-        new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
+        new Tree(null, "s", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "+", new Tree[] { }),
+        new Tree(null, "+", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { })})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "+", new Tree[] { })})})})})})})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "+", new Tree[] { }),
-        new Tree(null, "/", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})})}),
+        new Tree(null, "s", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "+", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { })})})})})})}),
+        new Tree(null, "/", new Tree[] { new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "+", new Tree[] { }),
+        new Tree(null, "/", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})})})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "?", new Tree[] { })})})}),
+        new Tree(null, "s", new Tree[] { })})})}),
+        new Tree(null, "/", new Tree[] { new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "?", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { })}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})}),
-        new Tree(null, "=>", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "q", new Tree[] { }),
-        new Tree(null, "u", new Tree[] { }),
-        new Tree(null, "o", new Tree[] { }),
-        new Tree(null, "t", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "d", new Tree[] { })})})}),
-        new Tree(null, null, new Tree[] { new Tree(null, "l", new Tree[] { }),
-        new Tree(null, "i", new Tree[] { }),
-        new Tree(null, "t", new Tree[] { }),
-        new Tree(null, "e", new Tree[] { }),
-        new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "a", new Tree[] { }),
-        new Tree(null, "l", new Tree[] { })})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "(", new Tree[] { })})}),
+        new Tree(null, "s", new Tree[] { })})})}),
+        new Tree(null, "/", new Tree[] { new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "(", new Tree[] { })})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
         new Tree(null, "o", new Tree[] { }),
         new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "d", new Tree[] { })})}),
-        new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, ")", new Tree[] { })})})}),
+        new Tree(null, "d", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, ")", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { })}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})})}),
-        new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "^", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "(", new Tree[] { })})}),
-        new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "a", new Tree[] { }),
+        new Tree(null, "s", new Tree[] { })})})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, "/", new Tree[] { new Tree(null, "ps2", new Tree[] { new Tree(null, null, new Tree[] { }),
+        new Tree(null, null, new Tree[] { new Tree(null, "(", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "a", new Tree[] { }),
         new Tree(null, "l", new Tree[] { }),
         new Tree(null, "t", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
@@ -685,42 +662,38 @@ new Tree(null, "gram", new Tree[] { new Tree(null, null, new Tree[] { }),
         new Tree(null, "v", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
         new Tree(null, "s", new Tree[] { })})}),
-        new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, ")", new Tree[] { })})})}),
+        new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, ")", new Tree[] { })})})})}),
         new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "s", new Tree[] { })})})})})})})}),
+        new Tree(null, "s", new Tree[] { })})})})})})}),
         new Tree(null, "!::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, " ", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "/", new Tree[] { }),
+        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, " ", new Tree[] { })})})})}),
+        new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "/", new Tree[] { }),
         new Tree(null, "/", new Tree[] { })})}),
-        new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "*", new Tree[] { new Tree(null, "[~", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "range", new Tree[] { new Tree(null, "\n", new Tree[] { })})})})})})})})})}),
+        new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "*", new Tree[] { new Tree(null, "[~", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "range", new Tree[] { new Tree(null, "\n", new Tree[] { })})})})})})})})})}),
         new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "\n", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "\n", new Tree[] { })})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "\r", new Tree[] { })})})})})})})}),
-        new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "a", new Tree[] { }),
-        new Tree(null, "n", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "[", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "-", new Tree[] { new Tree(null, "a", new Tree[] { }),
+        new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "\n", new Tree[] { })})})})}),
+        new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "\r", new Tree[] { })})})})})})})}),
+        new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
+        new Tree(null, "o", new Tree[] { }),
+        new Tree(null, "r", new Tree[] { }),
+        new Tree(null, "d", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "++", new Tree[] { new Tree(null, "[", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "-", new Tree[] { new Tree(null, "a", new Tree[] { }),
         new Tree(null, "z", new Tree[] { })}),
         new Tree(null, "-", new Tree[] { new Tree(null, "A", new Tree[] { }),
         new Tree(null, "Z", new Tree[] { })}),
         new Tree(null, "-", new Tree[] { new Tree(null, "0", new Tree[] { }),
         new Tree(null, "9", new Tree[] { })}),
-        new Tree(null, "range", new Tree[] { new Tree(null, "_", new Tree[] { })})})})})})})})}),
-        new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "w", new Tree[] { }),
-        new Tree(null, "o", new Tree[] { }),
-        new Tree(null, "r", new Tree[] { }),
-        new Tree(null, "d", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "++", new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "a", new Tree[] { }),
-        new Tree(null, "n", new Tree[] { })})})})})})})})}),
+        new Tree(null, "range", new Tree[] { new Tree(null, "_", new Tree[] { })})})})})})})})})}),
         new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "q", new Tree[] { }),
         new Tree(null, "u", new Tree[] { }),
         new Tree(null, "o", new Tree[] { }),
         new Tree(null, "t", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
         new Tree(null, "d", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "\"", new Tree[] { })})}),
-        new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "+", new Tree[] { new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "[~", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "range", new Tree[] { new Tree(null, "\"", new Tree[] { })}),
+        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "\"", new Tree[] { })})}),
+        new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "+", new Tree[] { new Tree(null, "(", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "[~", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "range", new Tree[] { new Tree(null, "\"", new Tree[] { })}),
         new Tree(null, "range", new Tree[] { new Tree(null, "\\", new Tree[] { })})})})})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
+        new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "nonTerminal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
         new Tree(null, "s", new Tree[] { }),
         new Tree(null, "c", new Tree[] { }),
         new Tree(null, "a", new Tree[] { }),
@@ -728,8 +701,8 @@ new Tree(null, "gram", new Tree[] { new Tree(null, null, new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
         new Tree(null, "d", new Tree[] { })})})})})})})})})})})})})}),
         new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "\"", new Tree[] { })})})})}),
-        new Tree(null, "=>", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "\"", new Tree[] { }),
-        new Tree(null, "\"", new Tree[] { })})})}),
+        new Tree(null, "=>", new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "\"", new Tree[] { }),
+        new Tree(null, "\"", new Tree[] { })})})})}),
         new Tree(null, "", new Tree[] { })})})})}),
         new Tree(null, "::=", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "e", new Tree[] { }),
         new Tree(null, "s", new Tree[] { }),
@@ -738,13 +711,13 @@ new Tree(null, "gram", new Tree[] { new Tree(null, null, new Tree[] { }),
         new Tree(null, "p", new Tree[] { }),
         new Tree(null, "e", new Tree[] { }),
         new Tree(null, "d", new Tree[] { })}),
-        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "=>", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "\\", new Tree[] { }),
-        new Tree(null, "n", new Tree[] { })})})}),
+        new Tree(null, null, new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "=>", new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "\\", new Tree[] { }),
+        new Tree(null, "n", new Tree[] { })})})})}),
         new Tree(null, null, new Tree[] { new Tree(null, "\n", new Tree[] { })})}),
-        new Tree(null, "=>", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "\\", new Tree[] { }),
-        new Tree(null, "r", new Tree[] { })})})}),
+        new Tree(null, "=>", new Tree[] { new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "\\", new Tree[] { }),
+        new Tree(null, "r", new Tree[] { })})})})}),
         new Tree(null, null, new Tree[] { new Tree(null, "\r", new Tree[] { })})}),
-        new Tree(null, "rewrite", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "\\", new Tree[] { })})}),
+        new Tree(null, "ps", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "literal", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "\\", new Tree[] { })})}),
         new Tree(null, "[~", new Tree[] { new Tree(null, null, new Tree[] { new Tree(null, "range", new Tree[] { new Tree(null, "n", new Tree[] { })}),
         new Tree(null, "range", new Tree[] { new Tree(null, "r", new Tree[] { })})})})})})})})})})}),
         new Tree(null, null, new Tree[] { })})
@@ -781,3 +754,13 @@ new Tree(null, "gram", new Tree[] { new Tree(null, null, new Tree[] { }),
 
 
 
+
+
+
+
+
+
+
+
+
+