X-Git-Url: http://git.megacz.com/?p=sbp.git;a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fsbp%2Fmeta%2FMetaGrammarBindings.java;fp=src%2Fedu%2Fberkeley%2Fsbp%2Fmeta%2FMetaGrammarBindings.java;h=0000000000000000000000000000000000000000;hp=927cd6248b6aba71085ae5a27ccb9a0a57ed9ebf;hb=7dd51387ce4308d3784a1291604203aaf677ba16;hpb=9d727bd14c659cdc6c34153b988e8d3fdb8067f5

diff --git a/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java b/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java
deleted file mode 100644
index 927cd62..0000000
--- a/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java
+++ /dev/null
@@ -1,514 +0,0 @@
-// Copyright 2006 all rights reserved; see LICENSE file for BSD-style license
-
-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.*;
-
-/** The java classes typically used to represent a parsed grammar AST; each inner class is a type of AST node. */
-public class MetaGrammarBindings extends AnnotationGrammarBindings {
-
-    public MetaGrammarBindings() { super(MetaGrammarBindings.class); }
-
-    // FIXME ugly ugly ugly scary dangerous
-    public static String prefix = "";
-    
-    /** A grammar (a set of nonterminals) */
-    public static class GrammarNode extends HashMap<String,NonTerminalNode> {
-        public NonTerminalNode[] getNonTerminals() {
-            return (NonTerminalNode[])values().toArray(new NonTerminalNode[0]);
-        }
-        public GrammarNode(NonTerminalNode[] nonterminals) {
-            for(NonTerminalNode nt : nonterminals) {
-                if (nt==null) continue;
-                if (this.get(nt.name)!=null)
-                    throw new RuntimeException("duplicate definition of nonterminal \""+nt.name+"\"");
-                this.put(nt.name, nt);
-            }
-        }
-        public @bind.as("Grammar") GrammarNode(Object[] nt) { add(nt); }
-        private void add(Object[] obs) {
-            for(Object o : obs) {
-                if (o==null) continue;
-                else if (o instanceof Object[]) add((Object[])o);
-                else if (o instanceof NonTerminalNode) {
-                    NonTerminalNode nt = (NonTerminalNode)o;
-                    if (this.get(nt.name)!=null)
-                        throw new RuntimeException("duplicate definition of nonterminal \""+nt.name+"\"");
-                    this.put(nt.name, nt);
-                }
-                else if (o instanceof GrammarNode) add(((GrammarNode)o).getNonTerminals());
-            }
-        }
-        public String toString() {
-            String ret = "[ ";
-            for(NonTerminalNode nt : values()) ret += nt + ", ";
-            return ret + " ]";
-        }
-        public Union build(String s, Grammar.Bindings rm) {
-            Context cx = new Context(this,rm);
-            Union u = null;
-            for(MetaGrammarBindings.NonTerminalNode nt : values()) {
-                Union el = (Union)cx.get(nt.name);
-                StringBuffer st = new StringBuffer();
-                el.toString(st);
-                if (nt.name.equals(s)) u = el;
-            }
-            return u;
-        }
-    }
-
-    public abstract static class UnionNode extends ElementNode {
-        public Seq[][] sequences;
-        public Atom toAtom(Context cx) {
-            Atom ret = null;
-            for(Seq[] ss : sequences)
-                for(Seq s : ss)
-                    ret = ret==null ? s.toAtom(cx) : (Atom)ret.union(s.toAtom(cx));
-            return ret;
-        }
-        public void build(Context cx, Union u, NonTerminalNode cnt) {
-            HashSet<Sequence> bad2 = new HashSet<Sequence>();
-            for(int i=0; i<sequences.length; i++) {
-                Seq[] group = sequences[i];
-                Union u2 = new Union(null, false);
-                if (sequences.length==1) u2 = u;
-                for(int j=0; j<group.length; j++)
-                    group[j].build(cx, u2, cnt);
-                if (sequences.length==1) break;
-                Sequence seq = Sequence.create(u2);
-                for(Sequence s : bad2) seq = seq.andnot(s);
-                u.add(seq);
-                bad2.add(Sequence.create(u2));
-            }
-        }
-    }
-
-    public static @bind.as("#import") GrammarNode poundimport(String fileName, String as) {
-        if (as==null) as = "";
-        else if ("".equals(as)) { }
-        else as = as +".";
-
-        try {
-            Tree t = new CharParser(MetaGrammar.newInstance()).parse(new FileInputStream("tests/"+fileName)).expand1();
-            TreeFunctor<Object,Object> red = (TreeFunctor<Object,Object>)t.head();
-            String oldprefix = prefix;
-            prefix = as;
-            GrammarNode gn = (GrammarNode)red.invoke(t);
-            prefix = oldprefix;
-            return gn;
-        } catch (Exception e) {
-            e.printStackTrace();
-            throw new RuntimeException(e);
-        }
-    }
-
-    public static class NonTerminalNode extends UnionNode {
-        public boolean rep;
-        public String  name = null;
-        public String sep = null;
-        public NonTerminalNode[] getNonTerminals() { return new NonTerminalNode[] { this }; }
-        public @bind.as("NonTerminal") NonTerminalNode(@bind.arg String name, @bind.arg Seq[][] sequences) {
-            this(name, sequences, false); }
-        public NonTerminalNode(String name, Seq[][] sequences, boolean rep) { this(name, sequences, rep, null); }
-        public NonTerminalNode(String name, Seq[][] sequences, boolean rep, String sep) {
-            this.name = prefix + name;
-            this.sequences = sequences;
-            this.rep = rep;
-            this.sep = sep==null?null:(prefix + sep);
-        }
-        public Element build(Context cx, NonTerminalNode cnt) { return cx.get(name); }
-        public void build(Context cx, Union u, NonTerminalNode cnt) {
-            if (!rep) { super.build(cx, u, this); return; }
-            HashSet<Sequence> bad2 = new HashSet<Sequence>();
-
-            Union urep = new Union(null, false);
-            urep.add(Sequence.create());
-            if (sep != null)
-                urep.add(Sequence.create(new Element[] { cx.get(sep), u }, 1));
-            else
-                urep.add(Sequence.create(new Element[] { u }, 0));
-
-            for(int i=0; i<sequences.length; i++) {
-                Seq[] group = sequences[i];
-                Union u2 = new Union(null, false);
-                if (sequences.length==1) u2 = u;
-                for(int j=0; j<group.length; j++) {
-                    Union u3 = new Union(null, false);
-                    group[j].build(cx, u3, this);
-                    Sequence s = Sequence.create(cx.rm.repeatTag(),
-                                                 new Element[] { u3, urep },
-                                                 new boolean[] { false, false },
-                                                 true);
-                    u2.add(s);
-                }
-                if (sequences.length==1) break;
-                Sequence seq = Sequence.create(u2);
-                for(Sequence s : bad2) seq = seq.andnot(s);
-                u.add(seq);
-                bad2.add(Sequence.create(u2));
-            }
-        }
-    }
-
-    public static @bind.as("=") NonTerminalNode go(@bind.arg String name, @bind.arg Seq[][] sequences) {
-        return new NonTerminalNode(name, sequences, true); }
-    public static @bind.as("=") NonTerminalNode go(@bind.arg String name, @bind.arg String sep, @bind.arg Seq[][] sequences) {
-        return new NonTerminalNode(name, sequences, true, sep); }
-
-    public static class AnonUnionNode extends UnionNode {
-        public @bind.as("(") AnonUnionNode(Seq[][] sequences) {
-            this.sequences = sequences;
-        }
-        public Element build(Context cx, NonTerminalNode cnt) {
-            Union ret = new Union(null, false);
-            build(cx, ret, cnt);
-            return ret;
-        }
-    }
-
-    public static class Range {
-        public @bind Range(char only) { first = only; last = only; }
-        public @bind Range(char first, char last) { this.first = first; this.last = last; }
-        public char first;
-        public char last;
-    }
-
-    public static /*abstract*/ class Seq {
-        HashSet<Seq> and = new HashSet<Seq>();
-        HashSet<Seq> not = new HashSet<Seq>();
-        ElementNode[] elements;
-        ElementNode follow;
-        String tag = null;
-        public void append(ElementNode e) {
-            ElementNode[] elements = new ElementNode[this.elements.length+1];
-            System.arraycopy(this.elements, 0, elements, 0, this.elements.length);
-            this.elements = elements;
-            elements[elements.length-1] = e;
-        }
-        public Seq(ElementNode e) { this(new ElementNode[] { e }); }
-        public Seq(ElementNode[] elements) { this.elements = elements; }
-        public Atom toAtom(Context cx) {
-            if (elements.length != 1) throw new Error("you attempted to use ->, **, ++, or a similar character-class operator on a [potentially] multicharacter production");
-            return elements[0].toAtom(cx);
-        }
-        public Seq tag(String tag) { this.tag = prefix+tag; return this; }
-        public Seq follow(ElementNode follow) {
-            this.follow = follow;
-            return this;
-	}
-        public Seq dup() {
-            Seq ret = new Seq(elements);
-            ret.and.addAll(and);
-            ret.not.addAll(not);
-            ret.follow = follow;
-            ret.tag = prefix+tag;
-            return ret;
-        }
-        public Seq and(Seq s) { and.add(s); return this; }
-        public Seq andnot(Seq s) { not.add(s); return this; }
-        public Seq separate(ElementNode sep) {
-            ElementNode[] elements = new ElementNode[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(Context cx, Union u, NonTerminalNode cnt) {
-            Sequence ret = build0(cx, cnt);
-            for(Seq s : and) { Sequence dork = s.build(cx, null, cnt); ret = ret.and(dork); }
-            for(Seq s : not) { Sequence dork = s.build(cx, null, cnt); ret = ret.andnot(dork); }
-            if (u!=null) u.add(ret);
-            return ret;
-        }
-        public Sequence build0(Context cx, NonTerminalNode cnt) {
-            boolean[] drops = new boolean[elements.length];
-            Element[] els = new Element[elements.length];
-            for(int i=0; i<elements.length; i++) {
-                drops[i]  = elements[i].drop();
-                els[i] = elements[i].build(cx, cnt);
-                if (elements[i].getOwnerTag() != null)
-                    tag = elements[i].getOwnerTag();
-            }
-            Sequence ret = null;
-            Production prod = new Production(tag, (cnt==null?null:cnt.name), els, drops);
-            ret = cx.rm.createSequence(prod);
-            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.create(els, null));
-                if (idx != -1) ret = Sequence.create(els, idx);
-                else           ret = Sequence.create(els, null);
-            }
-            if (this.follow != null)
-                ret = ret.followedBy(this.follow.toAtom(cx));
-            return ret;
-        }
-    }
-    public static @bind.as("&")   Seq  and2(Seq s,        Seq a)   { return s.and(a); }
-    public static @bind.as("&~")  Seq  andnot2(Seq s,     Seq a)   { return s.andnot(a); }
-    public static @bind.as("->")  Seq  arrow(Seq s, ElementNode 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, ElementNode e) { return s.separate(e); }
-
-    public static Seq  seq(ElementNode[] elements)               { return new Seq(elements); }
-    public static @bind.as("Elements")  Seq  seq2(ElementNode[] elements)               { return new Seq(elements); }
-    public static @bind.as        Seq  psx(Seq s)                        { return s; }
-    public static @bind.as(":")   ElementNode   colon(String s, ElementNode e)             { return new Label(s, e); }
-    public static @bind.as(")")   void close(String foo)                 { throw new Error("not supported"); }
-    public static @bind.as("()")  ElementNode   epsilon()                         { return new Constant(epsilon); }
-
-    private static Union epsilon = new Union("()");
-    static { epsilon.add(Sequence.create()); }
-
-    public static class NonTerminalReferenceNode extends ElementNode {
-        public String nonTerminal;
-        public NonTerminalReferenceNode() { }
-        public @bind.as("NonTerminalReference") NonTerminalReferenceNode(String nonTerminal) {
-            this.nonTerminal = prefix + nonTerminal;
-        }
-        public Atom toAtom(Context cx) {
-            return cx.grammar.get(nonTerminal).toAtom(cx);
-        }
-        public Element build(Context cx, NonTerminalNode cnt) {
-            if (!this.nonTerminal.startsWith(prefix)) nonTerminal = prefix + nonTerminal;
-            Element ret = cx.get(nonTerminal);
-            if (ret == null) throw new RuntimeException("unknown nonterminal \""+nonTerminal+"\"");
-            return ret;
-        }
-    }
-
-    public static class Literal extends Constant {
-        private String string;
-        public @bind Literal(@bind.arg String string) {
-            super(CharAtom.string(string));
-            this.string = string;
-        }
-        public boolean drop() { return true; }
-        public Atom toAtom(Context cx) {
-            if (string.length()!=1) return super.toAtom(cx);
-            edu.berkeley.sbp.util.Range.Set set = new edu.berkeley.sbp.util.Range.Set();
-            set.add(string.charAt(0), string.charAt(0));
-            return CharAtom.set(set);
-        }
-    }
-
-    public static                     class CharClass            extends ElementNode {
-        Range[] ranges;
-        public @bind.as("[") CharClass(Range[] ranges) { this.ranges = ranges; }
-        public Atom toAtom(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 CharAtom.set(set);
-        }
-        public Element build(Context cx, NonTerminalNode cnt) {
-            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 CharAtom.set(set);
-        }
-    }
-
-    public static @bind.as("\\{") ElementNode   leftBrace() {
-        return new Drop(new CharClass(new Range[] { new Range(CharAtom.left, CharAtom.left) })); }
-    public static @bind.as("\\}") ElementNode   rightBrace() {
-        return new Drop(new CharClass(new Range[] { new Range(CharAtom.right, CharAtom.right) })); }
-
-    public static @bind.as("{")           class XTree                 extends ElementNode {
-        public @bind.arg Seq body;
-        public Element build(Context cx, NonTerminalNode cnt) {
-            Union u = new Union(null, false);
-            Sequence s = body.build(cx, u, null);
-            Union u2 = new Union(null, false);
-            u2.add(Sequence.create(new Element[] {
-                CharAtom.leftBrace,
-                cx.get("ws"),
-                u,
-                cx.get("ws"),
-                CharAtom.rightBrace
-            }, 2));
-            return u2;
-        }
-    }
-
-    public static class Rep extends ElementNode {
-        public ElementNode e, sep;
-        public boolean zero, many, max;
-        public Rep(ElementNode e, ElementNode sep, boolean zero, boolean many, boolean max) {
-            this.e = e; this.sep = sep; this.zero = zero; this.many = many; this.max = max;}
-        public Atom toAtom(Context cx) {
-            if (sep != null) return super.toAtom(cx);
-            return e.toAtom(cx);
-        }
-        public Element build(Context cx, NonTerminalNode cnt) {
-            return (!max)
-                ? Repeat.repeat(e.build(cx, null), zero, many, sep==null ? null : sep.build(cx, null), cx.rm.repeatTag())
-                : sep==null
-                ? Repeat.repeatMaximal(e.toAtom(cx), zero, many, cx.rm.repeatTag())
-                : Repeat.repeatMaximal(e.build(cx, null), zero, many, sep.toAtom(cx), cx.rm.repeatTag());
-        }
-    }
-
-    // FIXME: it would be nice if we could hoist this into "Rep"
-    public static @bind.as("++")  ElementNode plusmax(final ElementNode e)                     
-    { return new Rep(e, null, false, true, true); }
-    public static @bind.as("+")   ElementNode plus(final ElementNode e)                        
-    { return new Rep(e, null, false, true, false); }
-    public static @bind.as("++/") ElementNode plusmaxfollow(final ElementNode e, final ElementNode sep) 
-    { return new Rep(e, sep,  false, true, true); }
-    public static @bind.as("+/")  ElementNode plusfollow(final ElementNode e, final ElementNode sep)    
-    { return new Rep(e, sep,  false, true, false); }
-    public static @bind.as("**")  ElementNode starmax(final ElementNode e)                     
-    { return new Rep(e, null, true,  true, true); }
-    public static @bind.as("*")   ElementNode star(final ElementNode e)                        
-    { return new Rep(e, null, true,  true, false); }
-    public static @bind.as("**/") ElementNode starmaxfollow(final ElementNode e, final ElementNode sep) 
-    { return new Rep(e, sep,  true,  true, true); }
-    public static @bind.as("*/")  ElementNode starfollow(final ElementNode e, final ElementNode sep)    
-    { return new Rep(e, sep,  true,  true, false); }
-    public static @bind.as("?")   ElementNode question(final ElementNode e)                    
-    { return new Rep(e, null, true,  true, false); }
-    public static @bind.as("!")   ElementNode bang(final ElementNode e)                        
-    { return new Drop(e); }
-
-    public static @bind.as("^")   ElementNode caret(final String s) {
-        final String thePrefix = prefix;
-        return new Constant(CharAtom.string(s)) {
-                public String getOwnerTag() { return thePrefix+s; }
-                public boolean drop() { return true; }
-            };
-    }
-
-    public static @bind.as("~")   ElementNode tilde(final ElementNode e) {
-        return new ElementNodeWrapper(e) {
-                public Atom toAtom(Context cx) {
-                    return infer((Topology<Character>)e.toAtom(cx).complement()/*.minus(CharAtom.braces)*/);
-                }
-                public Element build(Context cx, NonTerminalNode cnt) {
-                    return infer((Topology<Character>)e.toAtom(cx).complement()/*.minus(CharAtom.braces)*/);
-                } }; }
-
-    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) {
-        if (c=='{') return CharAtom.left+"";
-        if (c=='}') return CharAtom.right+"";
-        return c+"";
-    }
-    public static @bind.as("EmptyString") 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(Object t) { return (Atom)t; }
-
-    public static class Context {
-        public HashMap<String,Union> map = new HashMap<String,Union>();
-        public GrammarNode grammar;
-        public String cnt = null;
-        public Grammar.Bindings rm;
-        public Context(GrammarNode g, Grammar.Bindings rm) {
-            this.grammar = g;
-            this.rm = rm;
-        }
-        public Union build() {
-            Union ret = null;
-            for(NonTerminalNode nt : grammar.values()) {
-                Union u = get(nt.name);
-                if ("s".equals(nt.name))
-                    ret = u;
-            }
-            return ret;
-        }
-        public Context(Tree t, Grammar.Bindings rm) {
-            this.rm = rm;
-            TreeFunctor<Object,Object> red = (TreeFunctor<Object,Object>)t.head();
-            this.grammar = (GrammarNode)red.invoke(t);
-        }
-        public Union peek(String name) { return map.get(name); }
-        public void  put(String name, Union u) { map.put(name, u); }
-        public Union get(String name) {
-            Union ret = map.get(name);
-            if (ret != null) return ret;
-            ret = new Union(name);
-            map.put(name, ret);
-            NonTerminalNode nt = grammar.get(name);
-            if (nt==null) {
-                throw new Error("warning could not find " + name);
-            } else {
-                String old = cnt;
-                cnt = name;
-                nt.build(this, ret, nt);
-                cnt = old;
-            }
-            return ret;
-        }
-
-    }
-
-    public static abstract class ElementNode {
-        public String getLabel() { return null; }
-        public String getOwnerTag() { return null; }
-        public boolean drop() { return false; }
-        public Atom toAtom(Context cx) { throw new Error("can't convert a " + this.getClass().getName() + " to an atom"); }
-        public abstract Element build(Context cx, NonTerminalNode cnt);
-    }
-
-    public static abstract class ElementNodeWrapper extends ElementNode {
-        protected ElementNode _e;
-        public ElementNodeWrapper(ElementNode e) { this._e = e; }
-        public String getLabel() { return _e.getLabel(); }
-        public String getOwnerTag() { return _e.getOwnerTag(); }
-        public boolean drop() { return _e.drop(); }
-        public Atom toAtom(Context cx) { return _e.toAtom(cx); }
-        public Element build(Context cx, NonTerminalNode cnt) { return _e.build(cx, cnt); }
-    }
-
-    public static class Constant extends ElementNode {
-        Element constant;
-        public Constant(Element constant) { this.constant = constant; }
-        public Element build(Context cx, NonTerminalNode cnt) { return constant; }
-        public Atom toAtom(Context cx) {
-            if (constant instanceof Atom) return ((Atom)constant);
-            return super.toAtom(cx);
-        }
-    }
-
-    public abstract static class PostProcess extends ElementNodeWrapper {
-        public PostProcess(ElementNode e) { super(e); }
-        public Element build(Context cx, NonTerminalNode cnt) { return postProcess(_e.build(cx, cnt)); }
-        public abstract Element postProcess(Element e);
-    }
-
-    public static class Drop extends ElementNodeWrapper {
-        public Drop(ElementNode e) { super(e); }
-        public boolean drop() { return true; }
-    }
-
-    public static class Label extends ElementNodeWrapper {
-        public String label;
-        public Label(String label, ElementNode e) { super(e); this.label = label; }
-        public String getLabel() { return label; }
-    }
-
-    /*
-    static class Invert extends Atom {
-        private final Atom a;
-        public Invert(Atom a) { this.a = a; }
-        public Topology top() { return a.complement(); }
-        public String toString() { return "~"+a; }
-    }
-    */
-}