From: adam <adam@megacz.com>
Date: Wed, 5 Jul 2006 05:18:43 +0000 (-0400)
Subject: checkpoint
X-Git-Tag: tag_for_25-Mar~201
X-Git-Url: http://git.megacz.com/?p=sbp.git;a=commitdiff_plain;h=f7d5c2384df4e9e586f3c3465a6e6e0f4212115c

checkpoint

darcs-hash:20060705051843-5007d-3e3a0ab2c41819d6ff4c645aa024369ecb483699.gz
---

diff --git a/src/edu/berkeley/sbp/meta/AnnotationGrammarBindingResolver.java b/src/edu/berkeley/sbp/meta/AnnotationGrammarBindingResolver.java
new file mode 100644
index 0000000..1955f7f
--- /dev/null
+++ b/src/edu/berkeley/sbp/meta/AnnotationGrammarBindingResolver.java
@@ -0,0 +1,62 @@
+package edu.berkeley.sbp.meta;
+import edu.berkeley.sbp.util.*;
+import edu.berkeley.sbp.*;
+import edu.berkeley.sbp.chr.*;
+import edu.berkeley.sbp.misc.*;
+import edu.berkeley.sbp.bind.*;
+import java.util.*;
+import java.lang.annotation.*;
+import java.lang.reflect.*;
+import java.io.*;
+
+public class AnnotationGrammarBindingResolver extends GrammarBindingResolver {
+
+    private static boolean harsh = true;
+
+    private final Class _cl;
+    private final Class[] _inner;
+
+    public AnnotationGrammarBindingResolver() {
+        this(MetaGrammarBindings.class);
+    }
+
+    public AnnotationGrammarBindingResolver(Class c) {
+        this._cl = c;
+        this._inner = c.getDeclaredClasses();
+    }
+
+    public AnnotationGrammarBindingResolver(Class c, Class[] inner) {
+        this._cl = c;
+        this._inner = inner;
+    }
+
+    public Object repeatTag() {
+        return new Tree.ArrayBuildingTreeFunctor<Object>();
+    }
+
+    public Sequence tryResolveTag(String tag, String nonTerminalName, Element[] els, Object[] labels, boolean[] drops) {
+        for(Method m : _cl.getMethods())
+            if (new MetaGrammar.Target(m).isCompatible(tag, nonTerminalName, els, labels, drops))
+                return new MetaGrammar.Target(m).makeSequence(tag, nonTerminalName, els, labels, drops);
+        for(Class c : _inner)
+            for(Constructor con : c.getConstructors())
+                if (new MetaGrammar.Target(con).isCompatible(tag, nonTerminalName, els, labels, drops))
+                    return new MetaGrammar.Target(con).makeSequence(tag, nonTerminalName, els, labels, drops);
+        for(Class c : _inner)
+            if (new MetaGrammar.Target(c).isCompatible(tag, nonTerminalName, els, labels, drops))
+                return new MetaGrammar.Target(c).makeSequence(tag, nonTerminalName, els, labels, drops);
+        return null;
+    }
+    public Sequence resolveTag(String tag, String nonTerminalName, Element[] els, Object[] labels, boolean[] drops) {
+        Sequence ret = tryResolveTag(tag, nonTerminalName, els, labels, drops);
+        if (ret != null) return ret;
+        String message = "could not find a Java method/class/ctor matching tag \""+tag+
+            "\", nonterminal \""+nonTerminalName+"\" with " + els.length + " arguments";
+        if (harsh) {
+            throw new RuntimeException(message);
+        } else {
+            System.err.println(message);
+            return Sequence.rewritingSequence(tag, els, labels, drops);
+        }
+    }
+}
diff --git a/src/edu/berkeley/sbp/meta/GrammarBindingResolver.java b/src/edu/berkeley/sbp/meta/GrammarBindingResolver.java
new file mode 100644
index 0000000..a71122e
--- /dev/null
+++ b/src/edu/berkeley/sbp/meta/GrammarBindingResolver.java
@@ -0,0 +1,19 @@
+package edu.berkeley.sbp.meta;
+import edu.berkeley.sbp.util.*;
+import edu.berkeley.sbp.*;
+import edu.berkeley.sbp.chr.*;
+import edu.berkeley.sbp.misc.*;
+import edu.berkeley.sbp.bind.*;
+import java.util.*;
+import java.lang.annotation.*;
+import java.lang.reflect.*;
+import java.io.*;
+
+public class GrammarBindingResolver {
+    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);
+    }
+}
diff --git a/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java b/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java
new file mode 100644
index 0000000..3ba3d2a
--- /dev/null
+++ b/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java
@@ -0,0 +1,280 @@
+package edu.berkeley.sbp.meta;
+import edu.berkeley.sbp.util.*;
+import edu.berkeley.sbp.*;
+import edu.berkeley.sbp.chr.*;
+import edu.berkeley.sbp.misc.*;
+import edu.berkeley.sbp.bind.*;
+import java.util.*;
+import java.lang.annotation.*;
+import java.lang.reflect.*;
+import java.io.*;
+
+public class MetaGrammarBindings {
+    public static @bind class Grammar {
+        public NonTerminal get(String s) {
+            for(NonTerminal nt : nonterminals)
+                if (nt.name.equals(s)) return nt;
+            return null;
+        }
+        public @bind.arg NonTerminal[] nonterminals;
+        public String toString() {
+            String ret = "[ ";
+            for(NonTerminal nt : nonterminals) ret += nt + ", ";
+            return ret + " ]";
+        }
+    }
+    public abstract static class Un extends El {
+        public Seq[][] sequences;
+        public void build(MetaGrammar.Context cx, Union u) {
+            HashSet<Sequence> bad2 = new HashSet<Sequence>();
+            for(int i=0; i<sequences.length; i++) {
+                Seq[] group = sequences[i];
+                Union u2 = new Union();
+                if (sequences.length==1) u2 = u;
+                for(int j=0; j<group.length; j++) {
+                    group[j].build(cx, u2, false);
+                }
+                if (sequences.length==1) break;
+                Sequence seq = Sequence.singleton(u2);
+                for(Sequence s : bad2) {
+                    s.lame = true;
+                    seq = seq.not(s);
+                }
+                u.add(seq);
+                bad2.add(Sequence.singleton(u2));
+            }
+        }
+    }
+    public static class NonTerminal extends Un {
+        public String  name = null;
+        public @bind NonTerminal(@bind.arg("Word") String name,
+                                 @bind.arg("RHS") Seq[][] sequences) {
+            this.name = name;
+            this.sequences = sequences;
+        }
+        public Element build(MetaGrammar.Context cx) { return cx.get(name); }
+    }
+
+    public static class AnonUn extends Un {
+        public @bind.as("(") AnonUn(Seq[][] sequences) {
+            this.sequences = sequences;
+        }
+        public Element build(MetaGrammar.Context cx) {
+            Union ret = new Union();
+            build(cx, ret);
+            return ret;
+        }
+    }
+
+    //public static @bind.as void range(char c) { }
+    public static class Range {
+        public @bind.as("range") Range(char only) { first = only; last = only; }
+        public @bind.as("-")     Range(char first, char last) { this.first = first; this.last = last; }
+        public char first;
+        public char last;
+    }
+    public static abstract class El {
+        public String getLabel() { return null; }
+        public String getOwnerTag() { return null; }
+        public boolean drop() { return false; }
+        public abstract Element build(MetaGrammar.Context cx);
+    }
+    public static class Drop extends El {
+        public El e;
+        public Drop(El e) { this.e = e; }
+        public String getLabel() { return null; }
+        public boolean drop() { return true; }
+        public String getOwnerTag() { return e.getOwnerTag(); }
+        public Element build(MetaGrammar.Context cx) { return e.build(cx); }
+    }
+    public static class Label extends El {
+        public String label;
+        public El e;
+        public Label(String label, El e) { this.e = e; this.label = label; }
+        public String getLabel() { return label; }
+        public String getOwnerTag() { return e.getOwnerTag(); }
+        public Element build(MetaGrammar.Context cx) { return e.build(cx); }
+    }
+    public static /*abstract*/ class Seq {
+        HashSet<Seq> and = new HashSet<Seq>();
+        HashSet<Seq> not = new HashSet<Seq>();
+        El[] elements;
+        El follow;
+        String tag = null;
+        boolean lame;
+        public Seq(El e) { this(new El[] { e }); }
+        public Seq(El[] elements) { this.elements = elements; }
+        public Seq tag(String tag) { this.tag = tag; return this; }
+        public Seq follow(El follow) { this.follow = follow; return this; }
+        public Seq dup() {
+            Seq ret = new Seq(elements);
+            ret.and.addAll(and);
+            ret.not.addAll(not);
+            ret.follow = follow;
+            ret.tag = tag;
+            return ret;
+        }
+        public Seq and(Seq s) { and.add(s); s.lame = true; return this; }
+        public Seq andnot(Seq s) { not.add(s); s.lame = true; return this; }
+        public Seq separate(El sep) {
+            El[] elements = new El[this.elements.length * 2 - 1];
+            for(int i=0; i<this.elements.length; i++) {
+                elements[i*2]   = this.elements[i];
+                if (i<this.elements.length-1)
+                    elements[i*2+1] = new Drop(sep);
+            }
+            this.elements = elements;
+            return this;
+        }
+        public Sequence build(MetaGrammar.Context cx, Union u, boolean lame) {
+            Sequence ret = build0(cx, lame || this.lame);
+            for(Seq s : and) { Sequence dork = s.build(cx, u, true); ret = ret.and(dork); }
+            for(Seq s : not) { Sequence dork = s.build(cx, u, true); ret = ret.not(dork); }
+            u.add(ret);
+            ret.lame = lame;
+            return ret;
+        }
+        public Sequence build0(MetaGrammar.Context cx, boolean lame) {
+            boolean unwrap = false;
+            boolean dropAll = lame;
+            if (tag!=null && tag.equals("[]")) unwrap  = true;
+            if (tag!=null && "()".equals(tag)) dropAll = true;
+            Object[] labels = new Object[elements.length];
+            boolean[] drops = new boolean[elements.length];
+            Element[] els = new Element[elements.length];
+            for(int i=0; i<elements.length; i++) {
+                labels[i] = elements[i].getLabel();
+                drops[i]  = elements[i].drop();
+                els[i] = elements[i].build(cx);
+                if (elements[i].getOwnerTag() != null)
+                    tag = elements[i].getOwnerTag();
+            }
+            Sequence ret = null;
+            if (dropAll)     ret = Sequence.drop(els, false);
+            else if (unwrap) ret = Sequence.unwrap(els, cx.rm.repeatTag(), drops);
+            else if (tag!=null) {
+                ret = cx.rm.resolveTag(tag, cx.cnt, els, labels, drops);
+            } else {
+                ret = cx.rm.tryResolveTag(tag, cx.cnt, els, labels, drops);
+                if (ret == null) {
+                    int idx = -1;
+                    for(int i=0; i<els.length; i++)
+                        if (!drops[i])
+                            if (idx==-1) idx = i;
+                            else throw new Error("multiple non-dropped elements in sequence: " + Sequence.drop(els,false));
+                    if (idx != -1) ret = Sequence.singleton(els, idx);
+                    else           ret = Sequence.drop(els, false);
+                }
+            }
+            if (this.follow != null)
+                ret.follow = infer(this.follow.build(cx));
+            ret.lame = this.lame;
+            return ret;
+        }
+    }
+    public static @bind.as("&")   Seq  and(Seq s,         El[] elements) { return s.and(seq(elements)); }
+    public static @bind.as("&~")  Seq  andnot(Seq s,      El[] elements) { return s.andnot(seq(elements)); }
+    public static @bind.as("->")  Seq  arrow(Seq s, El e)                { return s.follow(e); }
+    public static @bind.as("::")  Seq  tag(String tagname, Seq s)        { return s.tag(tagname); }
+    public static @bind.as("/")   Seq  slash(Seq s, El e)                { return s.separate(e); }
+
+    public static @bind.as("ps")  Seq  seq(El[] elements)                { return new Seq(elements); }
+    public static @bind.as        Seq  psx(Seq s)                        { return s; }
+    public static @bind.as(":")   El   colon(String s, El e)             { return new Label(s, e); }
+    public static @bind.as(")")   void close(String foo)                 { throw new Error("not supported"); }
+    public static @bind.as("()")  El   epsilon()                         { return new Constant(Union.epsilon); }
+
+    public static @bind.as("nonTerminal") class NonTerminalReference extends El {
+        public @bind.arg String nonTerminal;
+        public Element build(MetaGrammar.Context cx) {
+            return cx.get(nonTerminal);
+        }
+    }
+
+    public static class StringLiteral        extends Constant {
+        public @bind.as("literal") StringLiteral(String string) { super(CharRange.string(string)); }
+        public boolean drop() { return true; }
+    }
+
+    public static                     class CharClass            extends El {
+        Range[] ranges;
+        public @bind.as("[") CharClass(Range[] ranges) { this.ranges = ranges; }
+        public Element build(MetaGrammar.Context cx) {
+            edu.berkeley.sbp.util.Range.Set set = new edu.berkeley.sbp.util.Range.Set();
+            for(Range r : ranges)
+                set.add(r.first, r.last);
+            return CharRange.set(set);
+        }
+    }
+
+    public static @bind.as("{")           class XTree                 extends El {
+        public @bind.arg Seq body;
+        public Element build(MetaGrammar.Context cx) {
+            throw new Error();
+        }
+    }
+
+    public static class Rep extends El {
+        public El e, sep;
+        public boolean zero, many, max;
+        public Rep(El e, El sep, boolean zero, boolean many, boolean max) {
+            this.e = e; this.sep = sep; this.zero = zero; this.many = many; this.max = max;}
+        public Element build(MetaGrammar.Context cx) {
+            return (!max)
+                ? Sequence.repeat(e.build(cx),        zero, many, sep==null ? null : sep.build(cx), cx.rm.repeatTag())
+                : sep==null
+                ? Sequence.repeatMaximal(infer(e.build(cx)), zero, many,                                   cx.rm.repeatTag())
+                : Sequence.repeatMaximal(e.build(cx),                    zero, many, infer(sep.build(cx)), cx.rm.repeatTag());
+        }
+    }
+    public static class Constant extends El {
+        Element constant;
+        public Constant(Element constant) { this.constant = constant; }
+        public Element build(MetaGrammar.Context cx) { return constant; }
+    }
+    public abstract static class PostProcess extends El {
+        El e;
+        public PostProcess(El e) { this.e = e; }
+        public Element build(MetaGrammar.Context cx) { return postProcess(e.build(cx)); }
+        public abstract Element postProcess(Element e);
+    }
+
+    // FIXME: it would be nice if we could hoist this into "Rep"
+    public static @bind.as("++")  El plusmax(final El e)                     { return new Rep(e, null, false, true, true); }
+    public static @bind.as("+")   El plus(final El e)                        { return new Rep(e, null, false, true, false); }
+    public static @bind.as("++/") El plusmaxfollow(final El e, final El sep) { return new Rep(e, sep,  false, true, true); }
+    public static @bind.as("+/")  El plusfollow(final El e, final El sep)    { return new Rep(e, sep,  false, true, false); }
+    public static @bind.as("**")  El starmax(final El e)                     { return new Rep(e, null, true,  true, true); }
+    public static @bind.as("*")   El star(final El e)                        { return new Rep(e, null, true,  true, false); }
+    public static @bind.as("**/") El starmaxfollow(final El e, final El sep) { return new Rep(e, sep,  true,  true, true); }
+    public static @bind.as("*/")  El starfollow(final El e, final El sep)    { return new Rep(e, sep,  true,  true, false); }
+    public static @bind.as("?")   El question(final El e)                    { return new Rep(e, null, true,  true, false); }
+
+    public static @bind.as("!")   El bang(final El e)                        { return new Drop(e); }
+
+    public static @bind.as("^")   El caret(final String s) {
+        return new Drop(new Constant(CharRange.string(s)) {
+                public String getOwnerTag() { return s; }
+            });
+    }
+
+    public static @bind.as("~")   El tilde(final El e) {
+        return new PostProcess(e) {
+                public Element postProcess(Element e) {
+                    return infer((Topology<Character>)Atom.toAtom(e).complement()); 
+                } }; }
+
+    public static @bind.as("^^")  void doublecaret(final El e)                 { throw new Error("not implemented"); }
+
+    //public static @bind.as("(")   El subexpression(Seq[][] rhs)                { return new NonTerminal(rhs); }
+
+    public static @bind.as("Word")    String word(String s) { return s; }
+    public static @bind.as("Quoted")  String quoted(String s) { return s; }
+    public static @bind.as("escaped") String c(char c) { return c+""; }
+    public static @bind.as("\"\"")    String emptystring() { return ""; }
+    public static @bind.as("\n")      String retur() { return "\n"; }
+    public static @bind.as("\r")      String lf() { return "\r"; }
+
+    static Atom infer(Element e)  { return infer((Topology<Character>)Atom.toAtom(e)); }
+    static Atom infer(Topology<Character> t) { return new CharRange(new CharTopology(t)); }
+}