for(NonTerminalNode nt : values()) ret += nt + ", ";
return ret + " ]";
}
+ public Union build(String s, GrammarBindingResolver 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 void build(MetaGrammar.Context cx, Union u) {
+ public void build(Context cx, Union u) {
HashSet<Sequence> bad2 = new HashSet<Sequence>();
for(int i=0; i<sequences.length; i++) {
Seq[] group = sequences[i];
this.rep = rep;
this.sep = sep;
}
- public Element build(MetaGrammar.Context cx) { return cx.get(name); }
- public void build(MetaGrammar.Context cx, Union u) {
+ public Element build(Context cx) { return cx.get(name); }
+ public void build(Context cx, Union u) {
if (!rep) { super.build(cx, u); return; }
HashSet<Sequence> bad2 = new HashSet<Sequence>();
public @bind.as("(") AnonUnionNode(Seq[][] sequences) {
this.sequences = sequences;
}
- public Element build(MetaGrammar.Context cx) {
+ public Element build(Context cx) {
Union ret = new Union();
build(cx, ret);
return ret;
public char first;
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(MetaGrammar.Context cx);
+ public abstract Element build(Context cx);
}
+
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(MetaGrammar.Context cx) { return e.build(cx); }
+ public Element build(Context cx) { return e.build(cx); }
}
+
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(MetaGrammar.Context cx) { return e.build(cx); }
+ public Element build(Context cx) { return e.build(cx); }
}
+
public static /*abstract*/ class Seq {
HashSet<Seq> and = new HashSet<Seq>();
HashSet<Seq> not = new HashSet<Seq>();
this.elements = elements;
return this;
}
- public Sequence build(MetaGrammar.Context cx, Union u, boolean lame) {
+ public Sequence build(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); }
ret.lame = lame;
return ret;
}
- public Sequence build0(MetaGrammar.Context cx, boolean lame) {
+ public Sequence build0(Context cx, boolean lame) {
boolean dropAll = lame;
if (tag!=null && "()".equals(tag)) dropAll = true;
Object[] labels = new Object[elements.length];
public static @bind.as("NonTerminalReference") class NonTerminalReferenceNode extends ElementNode {
public @bind.arg String nonTerminal;
- public Element build(MetaGrammar.Context cx) { return cx.get(nonTerminal); }
+ public Element build(Context cx) { return cx.get(nonTerminal); }
}
public static class Literal extends Constant {
public static class CharClass extends ElementNode {
Range[] ranges;
public @bind.as("[") CharClass(Range[] ranges) { this.ranges = ranges; }
- public Element build(MetaGrammar.Context cx) {
+ public Element build(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);
public static @bind.as("{") class XTree extends ElementNode {
public @bind.arg Seq body;
- public Element build(MetaGrammar.Context cx) {
+ public Element build(Context cx) {
Union u = new Union();
Sequence s = body.build(cx, u, false);
Union u2 = new Union();
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 Element build(MetaGrammar.Context cx) {
+ public Element build(Context cx) {
return (!max)
? Sequence.repeat(e.build(cx), zero, many, sep==null ? null : sep.build(cx), cx.rm.repeatTag())
: sep==null
public static class Constant extends ElementNode {
Element constant;
public Constant(Element constant) { this.constant = constant; }
- public Element build(MetaGrammar.Context cx) { return constant; }
+ public Element build(Context cx) { return constant; }
}
public abstract static class PostProcess extends ElementNode {
ElementNode e;
public PostProcess(ElementNode e) { this.e = e; }
- public Element build(MetaGrammar.Context cx) { return postProcess(e.build(cx)); }
+ public Element build(Context cx) { return postProcess(e.build(cx)); }
public abstract Element postProcess(Element e);
}
return infer((Topology<Character>)Atom.toAtom(e).complement());
} }; }
- public static @bind.as("^^") void doublecaret(final ElementNode e) { throw new Error("not implemented"); }
-
- //public static @bind.as("(") ElementNode subexpression(Seq[][] rhs) { return new NonTerminalNode(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+""; }
static Atom infer(Element e) { return infer((Topology<Character>)Atom.toAtom(e)); }
static Atom infer(Topology<Character> t) { return new CharRange(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) {
+ 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, GrammarBindingResolver rm) {
+ this.rm = rm;
+ Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
+ this.grammar = (GrammarNode)red.invoke(t.children());
+ }
+ 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) {
+ System.err.println("*** warning could not find " + name);
+ } else {
+ String old = cnt;
+ cnt = name;
+ nt.build(this, ret);
+ cnt = old;
+ }
+ return ret;
+ }
+
+ }
+
}
projects / sbp.git / blobdiff