--- /dev/null
+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);
+ }
+ }
+}
--- /dev/null
+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)); }
+}
projects / sbp.git / commitdiff