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 {
+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> implements NonTerminalSource {
+ public static class GrammarNode extends HashMap<String,NonTerminalNode> {
public NonTerminalNode[] getNonTerminals() {
return (NonTerminalNode[])values().toArray(new NonTerminalNode[0]);
}
this.put(nt.name, nt);
}
}
- public @bind.as("Grammar") GrammarNode(Object[] nt) {
- add(nt);
- }
+ public @bind.as("Grammar") GrammarNode(Object[] nt) { add(nt); }
private void add(Object[] obs) {
for(Object o : obs) {
if (o==null) continue;
throw new RuntimeException("duplicate definition of nonterminal \""+nt.name+"\"");
this.put(nt.name, nt);
}
- else if (o instanceof NonTerminalSource) add(((NonTerminalSource)o).getNonTerminals());
+ else if (o instanceof GrammarNode) add(((GrammarNode)o).getNonTerminals());
}
}
public String toString() {
for(NonTerminalNode nt : values()) ret += nt + ", ";
return ret + " ]";
}
- public Union build(String s, GrammarBindingResolver rm) {
+ public Union build(String s, Grammar.Bindings rm) {
Context cx = new Context(this,rm);
Union u = null;
for(MetaGrammarBindings.NonTerminalNode nt : values()) {
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) : infer(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();
+ 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, false, cnt);
if (as==null) as = "";
else if ("".equals(as)) { }
else as = as +".";
-
- System.err.println("#import " + fileName + " as " + as);
+
try {
- Tree t = new CharParser(MetaGrammar.make()).parse(new FileInputStream(fileName)).expand1();
- Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
+ 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);
}
}
- public static interface NonTerminalSource {
- public NonTerminalNode[] getNonTerminals();
- }
-
- public static class NonTerminalNode extends UnionNode implements NonTerminalSource {
+ 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 @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 = prefix + sep;
+ 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();
+ Union urep = new Union(null, false);
urep.add(Sequence.empty);
- urep.add(Sequence.singleton(new Element[] { cx.get(sep), u }, 1));
+ if (sep != null)
+ urep.add(Sequence.singleton(new Element[] { cx.get(sep), u }, 1));
+ else
+ urep.add(Sequence.singleton(new Element[] { u }, 0));
for(int i=0; i<sequences.length; i++) {
Seq[] group = sequences[i];
- Union u2 = new Union();
+ Union u2 = new Union(null, false);
if (sequences.length==1) u2 = u;
for(int j=0; j<group.length; j++) {
- Union u3 = new Union();
+ Union u3 = new Union(null, false);
group[j].build(cx, u3, false, this);
Sequence s = Sequence.unwrap(new Element[] { u3, urep },
cx.rm.repeatTag(),
}
}
}
- 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 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);
- }
+ 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();
+ Union ret = new Union(null, false);
build(cx, ret, cnt);
return ret;
}
public char last;
}
- public static abstract class ElementNode {
- public String getLabel() { return null; }
- public String getOwnerTag() { return null; }
- public boolean drop() { return false; }
- public abstract Element build(Context cx, NonTerminalNode cnt);
- }
-
- public static class Drop extends ElementNode {
- public ElementNode e;
- public Drop(ElementNode e) { this.e = e; }
- public String getLabel() { return null; }
- public boolean drop() { return true; }
- public String getOwnerTag() { return e.getOwnerTag(); }
- public Element build(Context cx, NonTerminalNode cnt) { return e.build(cx, cnt); }
- }
-
- public static class Label extends ElementNode {
- public String label;
- public ElementNode e;
- public Label(String label, ElementNode e) { this.e = e; this.label = label; }
- public String getLabel() { return label; }
- public String getOwnerTag() { return e.getOwnerTag(); }
- public Element build(Context cx, NonTerminalNode cnt) { return e.build(cx, cnt); }
- }
-
public static /*abstract*/ class Seq {
HashSet<Seq> and = new HashSet<Seq>();
HashSet<Seq> not = new HashSet<Seq>();
}
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("FIXME");
+ 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 follow(ElementNode follow) {
+ this.follow = follow;
+ return this;
+ }
public Seq dup() {
Seq ret = new Seq(elements);
ret.and.addAll(and);
Sequence ret = null;
if (dropAll) ret = Sequence.drop(els, false);
else {
- ret = cx.rm.tryResolveTag(tag, cnt==null?null:cnt.name, els, drops);
+ 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.drop(els,false));
+ 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, null));
+ ret.follow = this.follow.toAtom(cx);
ret.lame = this.lame;
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 @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(Union.epsilon); }
+ public static @bind.as("()") ElementNode epsilon() { return new Constant(epsilon); }
+
+ private static Union epsilon = new Union("()");
+ static { epsilon.add(Sequence.empty); }
public static class NonTerminalReferenceNode extends ElementNode {
public String nonTerminal;
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);
}
public static class Literal extends Constant {
- public @bind Literal(@bind.arg String string) { super(CharRange.string(string)); }
+ 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 CharRange.set(set);
+ return CharAtom.set(set);
}
}
public static @bind.as("{") class XTree extends ElementNode {
public @bind.arg Seq body;
public Element build(Context cx, NonTerminalNode cnt) {
- Union u = new Union();
+ Union u = new Union(null, false);
Sequence s = body.build(cx, u, false, null);
- Union u2 = new Union();
+ Union u2 = new Union(null, false);
u2.add(Sequence.singleton(new Element[] {
- CharRange.leftBrace,
+ CharAtom.leftBrace,
cx.get("ws"),
u,
cx.get("ws"),
- CharRange.rightBrace
+ CharAtom.rightBrace
}, 2));
return u2;
}
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)
- ? Sequence.repeat(e.build(cx, null), zero, many, sep==null ? null : sep.build(cx, null), cx.rm.repeatTag())
+ ? Sequence.repeat(e.build(cx, null), zero, many, sep==null ? null : sep.build(cx, null), cx.rm.repeatTag())
: sep==null
- ? Sequence.repeatMaximal(infer(e.build(cx, null)), zero, many, cx.rm.repeatTag())
- : Sequence.repeatMaximal(e.build(cx, null), zero, many, infer(sep.build(cx, null)), cx.rm.repeatTag());
+ ? Sequence.repeatMaximal(e.toAtom(cx), zero, many, cx.rm.repeatTag())
+ : Sequence.repeatMaximal(e.build(cx, null), zero, many, sep.toAtom(cx), cx.rm.repeatTag());
}
}
- 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 abstract static class PostProcess extends ElementNode {
- ElementNode e;
- public PostProcess(ElementNode e) { this.e = e; }
- public Element build(Context cx, NonTerminalNode cnt) { return postProcess(e.build(cx, cnt)); }
- public abstract Element postProcess(Element e);
- }
// FIXME: it would be nice if we could hoist this into "Rep"
public static @bind.as("++") ElementNode plusmax(final ElementNode e)
public static @bind.as("^") ElementNode caret(final String s) {
final String thePrefix = prefix;
- return new Drop(new Constant(CharRange.string(s)) {
+ 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 PostProcess(e) {
- public Element postProcess(Element e) {
- return infer((Topology<Character>)Atom.toAtom(e).complement().minus(CharRange.braces));
+ 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("\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)); }
+ //static Atom infer(Element e) { return infer((Topology<Character>)Atom.toAtom(e)); }
+ static Atom infer(Topology<Character> t) { return new CharAtom(new CharTopology(t)); }
public static class Context {
public HashMap<String,Union> map = new HashMap<String,Union>();
public GrammarNode grammar;
public String cnt = null;
- public GrammarBindingResolver rm;
- public Context(GrammarNode g, GrammarBindingResolver rm) {
+ public Grammar.Bindings rm;
+ public Context(GrammarNode g, Grammar.Bindings rm) {
this.grammar = g;
this.rm = rm;
}
}
return ret;
}
- public Context(Tree t, GrammarBindingResolver rm) {
+ public Context(Tree t, Grammar.Bindings rm) {
this.rm = rm;
- Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
+ TreeFunctor<Object,Object> red = (TreeFunctor<Object,Object>)t.head();
this.grammar = (GrammarNode)red.invoke(t);
}
public Union peek(String name) { return map.get(name); }
map.put(name, ret);
NonTerminalNode nt = grammar.get(name);
if (nt==null) {
- //System.err.println("*** warning could not find " + name);
throw new Error("warning could not find " + name);
} else {
String old = cnt;
}
+ 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; }
+ }
}
projects / sbp.git / blobdiff