X-Git-Url: http://git.megacz.com/?p=sbp.git;a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fsbp%2Fmisc%2FDemo.java;h=c9c18f39b818087f1312edc5b7792873c4b9274b;hp=b3b9f4c2dc93827faff6b927c43624d95862b839;hb=683552e3855cac7417a6f456867a0c1dd96502a4;hpb=3784457891d6a8b17429a16493cd65501e02e174

diff --git a/src/edu/berkeley/sbp/misc/Demo.java b/src/edu/berkeley/sbp/misc/Demo.java
index b3b9f4c..c9c18f3 100644
--- a/src/edu/berkeley/sbp/misc/Demo.java
+++ b/src/edu/berkeley/sbp/misc/Demo.java
@@ -17,26 +17,13 @@ public class Demo {
         Tree<String> res = new CharParser(MetaGrammar.make()).parse(new FileInputStream(s[0])).expand1();
         MetaGrammar.Meta.MetaGrammarFile mgf = m.new MetaGrammarFile(res);
         MetaGrammar.BuildContext bc = new MetaGrammar.BuildContext(mgf);
+
         Union meta = mgf.get("s").build(bc);
-        System.err.println("parsing " + s[1]);
         Tree t = new CharParser(meta).parse(new FileInputStream(s[1])).expand1();
-        System.out.println("tree:\n" + t.toPrettyString());
-
-        Reducer red = (Reducer)t.head();
-        MG.Grammar g = (MG.Grammar)red.reduce(t);
-        System.out.println(g);
-        
-        Context cx = new Context(g,m);
-        Element u = null;
-        for(MG.NonTerminal nt : g.nonterminals) {
-            Union el = (Union)cx.get(nt.name);
-            StringBuffer st = new StringBuffer();
-            el.toString(st);
-            System.err.println(st);
-            if (nt.name.equals("s")) u = el;
-        }
-        System.err.println();
 
+        Union u = Demo.make(t, "s");
+
+        System.err.println();
         System.err.println("== parsing with parsed grammar =================================================================================");
         t = new CharParser((Union)u).parse(new FileInputStream(s[1])).expand1();
         System.out.println(t.toPrettyString());
@@ -46,6 +33,15 @@ public class Demo {
         System.out.println(t.toPrettyString());
     }
 
+    public static class ReflectiveMetaPlain extends ReflectiveMeta {
+        public Object repeatTag() { return null; }
+        public Sequence tryResolveTag(String tag, String nonTerminalName, Element[] els, Object[] labels, boolean[] drops) {
+            return null; }
+        public Sequence resolveTag(String tag, String nonTerminalName, Element[] els, Object[] labels, boolean[] drops) {
+            return Sequence.rewritingSequence(tag, els, labels, drops);
+        }
+    }
+
     public static class ReflectiveMeta extends MetaGrammar.Meta {
         private final Class _cl;
         private final Class[] _inner;
@@ -53,14 +49,14 @@ public class Demo {
             this(MG.class,
                  new Class[] {
                      MG.Grammar.class,
-                     MG.NonTerminal.class,
                      MG.AnonUn.class,
                      MG.Range.class,
                      MG.El.class,
                      MG.Seq.class,
+                     MG.NonTerminal.class,
                      MG.NonTerminalReference.class,
                      MG.StringLiteral.class,
-                     MG.Tree.class,
+                     MG.XTree.class,
                      MG.CharClass.class
                  });
         }
@@ -75,42 +71,27 @@ public class Demo {
             if (c != null && t.equals("") && c.getSimpleName().equals(s)) return true;
             return false;
         }
+        /*
         private boolean match(nonterminal t, Class c, String s) {
             if (t==null) return false;
             if (t.value().equals(s)) return true;
             if (c != null && t.equals("") && c.getSimpleName().equals(s)) return true;
             return false;
         }
+        */
         private boolean match(Class c, String s, String nonTerminalName) {
             if (match((tag)c.getAnnotation(tag.class), c, s)) return true;
-            if (match((nonterminal)c.getAnnotation(nonterminal.class), c, nonTerminalName)) return true;
+            //if (match((nonterminal)c.getAnnotation(tag.class), c, nonTerminalName)) return true;
             return false;
         }
         public boolean match(Constructor con, String s, String nonTerminalName) {
             Class c = con.getDeclaringClass();
             if (match((tag)con.getAnnotation(tag.class), null, s)) return true;
-            if (match((nonterminal)con.getAnnotation(nonterminal.class), c, s)) return true;
+            //if (match((nonterminal)con.getAnnotation(tag.class), c, s)) return true;
             return false;
         }
         public Object repeatTag() {
-            return new Reducer() {
-                    public String toString() { return "[**]"; }
-                    public Object reduce(Tree t) {
-                        Object[] ret = new Object[t.numChildren()];
-                        for(int i=0; i<t.numChildren(); i++) {
-                            Tree tc = t.child(i);
-                            if (tc.head() != null && tc.head() instanceof Reducer)
-                                ret[i] = ((Reducer)tc.head()).reduce(tc);
-                            else if (tc.numChildren() == 0)
-                                ret[i] = tc.head();
-                            else {
-                                System.err.println("FIXME: don't know what to do about " + tc);
-                                ret[i] = null;
-                            }
-                        }
-                        return ret;
-                    }
-                };
+            return new Tree.ArrayBuildingTreeFunctor<Object>();
         }
         public Sequence tryResolveTag(String tag, String nonTerminalName, Element[] els, Object[] labels, boolean[] drops) {
             Production p = new Production(tag, nonTerminalName, els, labels, drops);
@@ -147,7 +128,11 @@ public class Demo {
      *  that is arg-compatible.  If value() is undefined, then the
      *  class/constructor/method name is used.
      */ 
+    /*
     @Retention(RetentionPolicy.RUNTIME) public static @interface nonterminal { String value() default ""; }
+    */
+
+    @Retention(RetentionPolicy.RUNTIME) public static @interface raw { }
 
     /**
      *  Constructors, classes, and methods with this attribute will
@@ -199,18 +184,26 @@ public class Demo {
     }
 
     public static abstract class Target {
-        public abstract String getName();
-        public abstract tag getTag();
-        public abstract nonterminal getNonTerminal();
         public abstract int[] buildSequence(Production p);
+        private Reflection.Bindable _bindable;
+        public Target(Reflection.Bindable b) { this._bindable = b; }
+
+        public String getName() { return _bindable.getSimpleName(); }
+        public tag getTag() { return (tag)_bindable.getAnnotation(tag.class); }
+        //public nonterminal getNonTerminal() { return (nonterminal)_bindable.getAnnotation(tag.class); }
+        public String toString() { return _bindable.getSimpleName(); }
+        public Object plant(Object[] fields) { return _bindable.impose(fields); }
+        public boolean isRaw() { return _bindable.isAnnotationPresent(raw.class); }
+        public Object invokeRaw(Iterable<Tree<Object>> t) { return _bindable.impose(new Object[] { t }); }
+
         public boolean isCompatible(Production p) {
             tag t = getTag();
             if (t != null &&
                 (t.value().equals(p.tag) ||
-                 (t.value().equals("") && p.tag.equals(getName()))))
+                 (t.value().equals("") && getName().equals(p.tag))))
                 return buildSequence(p)!=null;
 
-            nonterminal n = getNonTerminal();
+            tag n = getTag();
             if (n != null &&
                 (n.value().equals(p.nonTerminal) ||
                  (n.value().equals("") && getName().equals(p.nonTerminal))))
@@ -218,6 +211,7 @@ public class Demo {
 
             return false;
         }
+
         public int[] buildSequence(Production p, String[] names, arg[] argtags) {
             int argTagged = 0;
             for(int i=0; i<argtags.length; i++)
@@ -240,47 +234,47 @@ public class Demo {
             }
         }
         public Sequence makeSequence(Production p) {
-            return Sequence.rewritingSequence(new TargetReducer(p), p.elements, p.labels, p.drops);
+            return Sequence.rewritingSequence(new TargetReducer(p, buildSequence(p), "reducer-"+this),
+                                              p.elements, p.labels, p.drops);
         }
-        public abstract Object plant(Object[] fields, int[] map);
-        public class TargetReducer implements Reducer {
+
+        public class TargetReducer implements Tree.TreeFunctor<Object,Object> {
             private Production p;
             private int[] map;
-            public TargetReducer(Production p) {
+            private String name;
+            public TargetReducer(Production p, int[] map, String name) {
                 this.p = p;
-                this.map = buildSequence(p);
+                this.map = map;
+                this.name = name;
             }
-            public String toString() { return "reducer-"+Target.this; }
-            public Object reduce(Tree t) {
-                Object[] objects = new Object[t.numChildren()];
-                for(int i=0; i<t.numChildren(); i++) {
-                    Tree tc = t.child(i);
-                    if (tc.head() != null && tc.head() instanceof Reducer)
-                        objects[i] = ((Reducer)tc.head()).reduce(tc);
+            public String toString() { return name; }
+            public Object invoke(Iterable<Tree<Object>> t) {
+                if (isRaw()) return invokeRaw(t);
+                ArrayList ret = new ArrayList();
+                for(Tree tc : t) {
+                    if (tc.head() != null && tc.head() instanceof Functor)
+                        ret.add(((Tree.TreeFunctor<Object,Object>)tc.head()).invoke(tc.children()));
                     else if (tc.numChildren() == 0)
-                        objects[i] = tc.head();
+                        ret.add(tc.head());
                     else {
                         System.err.println("FIXME: don't know what to do about " + tc);
-                        objects[i] = null;
+                        ret.add(null);
                     }
                 }
                 System.err.println("input tree: " + t);
-                return plant(objects, map);
+                Object[] o = (Object[])ret.toArray(new Object[0]);
+                int max = 0;
+                for(int i=0; i<map.length; i++) max = Math.max(map[i], max);
+                Object[] o2 = new Object[max+1];
+                for(int i=0; i<o.length; i++) o2[map[i]] = o[i];
+                return plant(o2);
             }
         }
     }
 
-    public static interface Reducer {
-        public Object reduce(Tree t);
-    }
-
     public static class TargetClass extends Target {
         public final Class _class;
-        public TargetClass(Class _class) { this._class = _class; }
-        public String getName() { return _class.getSimpleName(); }
-        public tag getTag() { return (tag)_class.getAnnotation(tag.class); }
-        public nonterminal getNonTerminal() { return (nonterminal)_class.getAnnotation(nonterminal.class); }
-        public String toString() { return _class.getSimpleName(); }
+        public TargetClass(Class _class) { super(Reflection.Bindable.create(_class)); this._class = _class; }
         public int[] buildSequence(Production p) {
             Field[]  f       = _class.getDeclaredFields();
             String[] names   = new String[f.length];
@@ -296,45 +290,11 @@ public class Demo {
                     return new TargetConstructor(c).buildSequence(p);
             return null;
         }
-        public Object plant(Object[] fields, int[] map) {
-            try {
-                Object ret = _class.newInstance();
-                Field[] f = _class.getFields();
-                int j = 0;
-                for(int i=0; i<f.length; i++)
-                    if (map[i] != -1) {
-                        Object tgt = Reflection.lub(fields[map[i]]);
-                        if (f[i].getType() == String.class) tgt = stringify(tgt);
-                        // FUGLY
-                        tgt = coerce(tgt, f[i].getType());
-                        System.err.println("setting a " + f[i].getType().getName() + " to " + Reflection.show(tgt));
-                        f[i].set(ret, tgt);
-                    }
-                return ret;
-            } catch (Exception e) {
-                e.printStackTrace();
-                throw new RuntimeException(e);
-            }
-        }
-    }
-
-    public static String stringify(Object o) {
-        if (o==null) return "";
-        if (!(o instanceof Object[])) return o.toString();
-        Object[] arr = (Object[])o;
-        StringBuffer ret = new StringBuffer();
-        for(int i=0; i<arr.length; i++)
-            ret.append(arr[i]);
-        return ret.toString();
     }
 
     public static class TargetConstructor extends Target {
         public final Constructor _ctor;
-        public TargetConstructor(Constructor _ctor) { this._ctor = _ctor; }
-        public String getName() { return _ctor.getName(); }
-        public tag getTag() { return (tag)_ctor.getAnnotation(tag.class); }
-        public nonterminal getNonTerminal() { return (nonterminal)_ctor.getAnnotation(nonterminal.class); }
-        public String toString() { return _ctor.getName(); }
+        public TargetConstructor(Constructor _ctor) { super(Reflection.Bindable.create(_ctor)); this._ctor = _ctor; }
         public int[] buildSequence(Production p) {
             Annotation[][] annotations = _ctor.getParameterAnnotations();
             int len = annotations.length;
@@ -354,33 +314,10 @@ public class Demo {
                         argtags[i+ofs] = (arg)a;
             return buildSequence(p, names, argtags);
         }
-        public Object plant(Object[] fields, int[] map) {
-            try {
-                Class[] argTypes = _ctor.getParameterTypes();
-                Object[] args = new Object[argTypes.length];
-                int j = 0;
-                for(int i=0; i<args.length; i++)
-                    if (map[i] != -1) {
-                        Object tgt = Reflection.lub(fields[map[i]]);
-                        if (argTypes[i] == String.class) tgt = stringify(tgt);
-                        // FUGLY
-                        tgt = coerce(tgt, argTypes[i]);
-                        System.err.println("setting a " + argTypes[i].getName() + " to " + Reflection.show(tgt));
-                        args[i] = tgt;
-                    }
-                return _ctor.newInstance(args);
-            } catch (Exception e) {
-                throw new RuntimeException(e);
-            }
-        }
     }
     public static class TargetMethod extends Target {
         public final Method _method;
-        public TargetMethod(Method _method) { this._method = _method; }
-        public String getName() { return _method.getName(); }
-        public String toString() { return _method.getName(); }
-        public tag getTag() { return (tag)_method.getAnnotation(tag.class); }
-        public nonterminal getNonTerminal() { return (nonterminal)_method.getAnnotation(nonterminal.class); }
+        public TargetMethod(Method _method) { super(Reflection.Bindable.create(_method)); this._method = _method; }
         public int[] buildSequence(Production p) {
             Annotation[][] annotations = _method.getParameterAnnotations();
             String[] names   = new String[annotations.length];
@@ -392,54 +329,38 @@ public class Demo {
             int[] ret = buildSequence(p, names, argtags);
             return ret;
         }
-        public Object plant(Object[] fields, int[] map) {
-            try {
-                Class[] argTypes = _method.getParameterTypes();
-                Object[] args = new Object[argTypes.length];
-                int j = 0;
-                for(int i=0; i<args.length; i++)
-                    if (map[i] != -1) {
-                        Object tgt = Reflection.lub(fields[map[i]]);
-                        if (argTypes[i] == String.class) tgt = stringify(tgt);
-                        // FUGLY
-                        tgt = coerce(tgt, argTypes[i]);
-                        System.err.println("setting a " + argTypes[i].getName() + " to " + Reflection.show(tgt));
-                        args[i] = tgt;
-                    }
-                System.err.println("invoking " + _method + " with " + Reflection.show(args));
-                return _method.invoke(null, args);
-            } catch (Exception e) {
-                throw new RuntimeException(e);
-            }
-        }
     }
 
-    public static Object coerce(Object o, Class c) {
-        if (o==null) return null;
-        if (c.isInstance(o)) return o;
-        if (c == char.class) {
-            return o.toString().charAt(0);
+    public static Union cached = null;
+    public static Union make() {
+        if (cached != null) return cached;
+        try {
+            ReflectiveMeta m = new ReflectiveMeta();
+            Tree<String> res = new CharParser(MetaGrammar.make()).parse(new FileInputStream("tests/meta.g")).expand1();
+            MetaGrammar.Meta.MetaGrammarFile mgf = m.new MetaGrammarFile(res);
+            MetaGrammar.BuildContext bc = new MetaGrammar.BuildContext(mgf);
+            Union meta = mgf.get("s").build(bc);
+            Tree t = new CharParser(meta).parse(new FileInputStream("tests/meta.g")).expand1();
+            return cached = make(t, "s");
+        } catch (Exception e) {
+            throw new RuntimeException(e);
         }
-        if (c.isArray() && (c.getComponentType().isInstance(o))) {
-            Object[] ret = (Object[])Array.newInstance(c.getComponentType(), 1);
-            ret[0] = o;
-            return ret;
-        }
-        if (o.getClass().isArray() && c.isArray()) {
-            boolean ok = true;
-            for(int i=0; i<((Object[])o).length; i++) {
-                Object ob = (((Object[])o)[i]);
-                if (ob != null) {
-                    System.err.println("no hit with " + c.getComponentType().getName() + " on " + Reflection.show(((Object[])o)[i]));
-                    ok = false;
-                }
-            }
-            if (ok) {
-                System.err.println("hit with " + c.getComponentType().getName());
-                return Array.newInstance(c.getComponentType(), ((Object[])o).length);
-            }
+    }
+    public static Union make(Tree t, String s) { return make(t, s, new ReflectiveMeta()); }
+    public static Union make(Tree t, String s, ReflectiveMeta rm) {
+        Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
+        MG.Grammar g = (MG.Grammar)red.invoke(t.children());
+        Context cx = new Context(g,rm);
+        Union u = null;
+        for(MG.NonTerminal nt : g.nonterminals) {
+            System.out.println(nt.name);
+            Union el = (Union)cx.get(nt.name);
+            StringBuffer st = new StringBuffer();
+            el.toString(st);
+            System.err.println(st);
+            if (nt.name.equals(s)) u = el;
         }
-        return o;
+        return u;
     }
 
     public static class MG {
@@ -481,8 +402,8 @@ public class Demo {
         }
         public static class NonTerminal extends Un {
             public String  name = null;
-            public @nonterminal("NonTerminal") NonTerminal(@arg("Word") String name,
-                                                           @arg("RHS") Seq[][] sequences) {
+            public @tag("=") NonTerminal(@arg("Word") String name,
+                                         @arg("RHS") Seq[][] sequences) {
                 this.name = name;
                 this.sequences = sequences;
             }
@@ -621,10 +542,12 @@ public class Demo {
                 return cx.get(nonTerminal);
             }
         }
+
         public static class StringLiteral        extends Constant {
             public @tag("literal") StringLiteral(String string) { super(CharRange.string(string)); }
             public boolean drop() { return true; }
         }
+
         public static                     class CharClass            extends El {
             Range[] ranges;
             public @tag("[") CharClass(Range[] ranges) { this.ranges = ranges; }
@@ -636,7 +559,7 @@ public class Demo {
             }
         }
 
-        public static @tag("{")           class Tree                 extends El {
+        public static @tag("{")           class XTree                 extends El {
             public @arg Seq body;
             public Element build(Context cx) {
                 throw new Error();
@@ -697,9 +620,9 @@ public class Demo {
 
         //public static @tag("(")   El subexpression(Seq[][] rhs)                { return new NonTerminal(rhs); }
 
-        public static @nonterminal("Word")    String word(String s) { return s; }
-        public static @nonterminal("Quoted")  String quoted(String s) { return s; }
-        public static @nonterminal("escaped") String c(char c) { return c+""; }
+        public static @tag("Word")    String word(String s) { return s; }
+        public static @tag("Quoted")  String quoted(String s) { return s; }
+        public static @tag("escaped") String c(char c) { return c+""; }
         public static @tag("\"\"")            String emptystring() { return ""; }
         public static @tag("\n")              String retur() { return "\n"; }
         public static @tag("\r")              String lf() { return "\r"; }
@@ -725,8 +648,8 @@ public class Demo {
         }
         public Context(Tree t, ReflectiveMeta rm) {
             this.rm = rm;
-            Reducer red = (Reducer)t.head();
-            this.grammar = (MG.Grammar)red.reduce(t);
+            Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
+            this.grammar = (MG.Grammar)red.invoke(t.children());
         }
         public Union peek(String name) { return map.get(name); }
         public void  put(String name, Union u) { map.put(name, u); }