return ret + " ]";
}
public Union build(String rootNonterminal) {
- Context cx = new Context(this);
+ BuildContext cx = new BuildContext(this);
Union u = null;
for(GrammarAST.NonTerminalNode nt : values())
if (nt.name.equals(rootNonterminal))
this.unionNode = new UnionNode(sequences, rep, sep==null?null:(prefix + sep));
this.elementNode = alwaysDrop ? new DropNode(unionNode) : unionNode;
}
- public boolean isDropped(Context cx) { return alwaysDrop; }
- public Element build(Context cx, NonTerminalNode cnt, boolean dropall) { return cx.get(name); }
+ public boolean isDropped(BuildContext cx) { return alwaysDrop; }
+ public Element build(BuildContext cx, NonTerminalNode cnt, boolean dropall) { return cx.get(name); }
public ElementNode getElementNode() { return elementNode; }
public UnionNode getUnionNode() { return unionNode; }
}
/** negative conjuncts */
HashSet<Seq> not = new HashSet<Seq>();
public boolean alwaysDrop = false;
- public boolean isDropped(Context cx) {
+ public boolean isDropped(BuildContext cx) {
if (alwaysDrop) return true;
if (tag!=null) return false;
for(int i=0; i<elements.length; i++)
}
}
}
- public Atom toAtom(Context cx) {
+ public Atom toAtom(BuildContext cx) {
if (elements.length != 1)
throw new Error("you attempted to use ->, **, ++, or a similar character-class"+
" operator on a [potentially] multicharacter production");
this.elements = elements;
return this;
}
- public Sequence build(Context cx, Union u, NonTerminalNode cnt, boolean dropall) {
+ public Sequence build(BuildContext cx, Union u, NonTerminalNode cnt, boolean dropall) {
Sequence ret = build0(cx, cnt, dropall);
for(Seq s : and) ret = ret.and(s.build(cx, null, cnt, true));
for(Seq s : not) ret = ret.andnot(s.build(cx, null, cnt, true));
if (u!=null) u.add(ret);
return ret;
}
- public Sequence build0(Context cx, NonTerminalNode cnt, boolean dropall) {
+ public Sequence build0(BuildContext cx, NonTerminalNode cnt, boolean dropall) {
boolean[] drops = new boolean[elements.length];
Element[] els = new Element[elements.length];
dropall |= isDropped(cx);
/** the field name to be used when synthesizing AST classes; null if none suggested */
public String getFieldName() { return null; }
public boolean isLifted() { return false; }
- public boolean isDropped(Context cx) { return false; }
- public Atom toAtom(Context cx) { throw new Error("can't convert a " + this.getClass().getName() + " to an atom: " + this); }
- public abstract Element build(Context cx, NonTerminalNode cnt, boolean dropall);
+ public boolean isDropped(BuildContext cx) { return false; }
+ public Atom toAtom(BuildContext cx) { throw new Error("can't convert a " + this.getClass().getName() + " to an atom: " + this); }
+ public abstract Element build(BuildContext cx, NonTerminalNode cnt, boolean dropall);
}
/** a union, produced by a ( .. | .. | .. ) construct */
}
public String getFieldName() { return null; }
public boolean isLifted() { return false; }
- public boolean isDropped(Context cx) {
+ public boolean isDropped(BuildContext cx) {
for(Seq[] seqs : sequences)
for(Seq seq : seqs)
if (!seq.isDropped(cx))
return false;
return true;
}
- public Atom toAtom(Context cx) {
+ public Atom toAtom(BuildContext cx) {
Atom ret = null;
for(Seq[] ss : sequences)
for(Seq s : ss)
return ret;
}
- public Element build(Context cx, NonTerminalNode cnt, boolean dropall) {
+ public Element build(BuildContext cx, NonTerminalNode cnt, boolean dropall) {
return buildIntoPreallocatedUnion(cx, cnt, dropall, new Union(null, false)); }
- public Element buildIntoPreallocatedUnion(Context cx, NonTerminalNode cnt, boolean dropall, Union u) {
+ public Element buildIntoPreallocatedUnion(BuildContext cx, NonTerminalNode cnt, boolean dropall, Union u) {
Union urep = null;
if (rep) {
urep = new Union(null, false);
this.nonTerminal = nonTerminal.indexOf('.')==-1 ? (prefix + nonTerminal) : nonTerminal;
this.parenthesized = parenthesized;
}
- public NonTerminalNode resolve(Context cx) {
+ public NonTerminalNode resolve(BuildContext cx) {
NonTerminalNode ret = cx.grammar.get(nonTerminal);
if (ret==null) throw new RuntimeException("undefined nonterminal: " + nonTerminal);
return ret;
}
- public Atom toAtom(Context cx) {
+ public Atom toAtom(BuildContext cx) {
ElementNode ret = cx.grammar.get(nonTerminal).getElementNode();
if (ret == null) throw new RuntimeException("unknown nonterminal \""+nonTerminal+"\"");
return ret.toAtom(cx);
}
- public boolean isDropped(Context cx) { return resolve(cx).isDropped(cx); }
- public Element build(Context cx, NonTerminalNode cnt, boolean dropall) {
+ public boolean isDropped(BuildContext cx) { return resolve(cx).isDropped(cx); }
+ public Element build(BuildContext cx, NonTerminalNode cnt, boolean dropall) {
Element ret = cx.get(nonTerminal);
if (ret == null) throw new RuntimeException("unknown nonterminal \""+nonTerminal+"\"");
return ret;
}
public String getLiteralTag() { return caret ? thePrefix+string : null; }
public String toString() { return "\""+string+"\""; }
- public boolean isDropped(Context cx) { return true; }
- public Atom toAtom(Context cx) {
+ public boolean isDropped(BuildContext cx) { return true; }
+ public Atom toAtom(BuildContext cx) {
if (string.length()!=1) return super.toAtom(cx);
Range.Set set = new Range.Set();
set.add(string.charAt(0), string.charAt(0));
return CharAtom.set(set);
}
- public Element build(Context cx, NonTerminalNode cnt, boolean dropall) { return CharAtom.string(string); }
+ public Element build(BuildContext cx, NonTerminalNode cnt, boolean dropall) { return CharAtom.string(string); }
}
/** an atom (usually a character class) */
public AtomNode() { this(new char[0][]); }
public AtomNode(char[][] ranges) { this.ranges = ranges; }
public AtomNode(char[] range) { this.ranges = new char[][] { range }; }
- public Element build(Context cx, NonTerminalNode cnt, boolean dropall) { return toAtom(cx); }
- public Atom toAtom(Context cx) {
+ public Element build(BuildContext cx, NonTerminalNode cnt, boolean dropall) { return toAtom(cx); }
+ public Atom toAtom(BuildContext cx) {
Range.Set set = new Range.Set();
for(char[] r : ranges) set.add(r[0], r[1]);
return CharAtom.set(set);
public RepeatNode(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) { return sep==null ? e.toAtom(cx) : super.toAtom(cx); }
- public boolean isDropped(Context cx) { return e.isDropped(cx); }
- public Element build(Context cx, NonTerminalNode cnt, boolean dropall) {
+ public Atom toAtom(BuildContext cx) { return sep==null ? e.toAtom(cx) : super.toAtom(cx); }
+ public boolean isDropped(BuildContext cx) { return e.isDropped(cx); }
+ public Element build(BuildContext cx, NonTerminalNode cnt, boolean dropall) {
Element ret = build(cx, cnt, dropall, illegalTag);
String must = "must be tagged unless they appear within a dropped expression or their contents are dropped: ";
if (!dropall && !isDropped(cx) && !e.isDropped(cx))
else throw new RuntimeException("one-or-more repetitions (+) " + must + ret);
return ret;
}
- public Element build(Context cx, NonTerminalNode cnt, boolean dropall, Object repeatTag) {
+ public Element build(BuildContext cx, NonTerminalNode cnt, boolean dropall, Object repeatTag) {
return (!max)
? Repeat.repeat(e.build(cx, null, dropall), zero, many, sep==null ? null : sep.build(cx, null, dropall), repeatTag)
: sep==null
private abstract class ElementNodeWrapper extends ElementNode {
protected ElementNode _e;
public ElementNodeWrapper(ElementNode e) { this._e = e; }
- public boolean isDropped(Context cx) { return _e.isDropped(cx); }
- public Atom toAtom(Context cx) { return _e.toAtom(cx); }
- public Element build(Context cx, NonTerminalNode cnt, boolean dropall) { return _e.build(cx, cnt, dropall); }
+ public boolean isDropped(BuildContext cx) { return _e.isDropped(cx); }
+ public Atom toAtom(BuildContext cx) { return _e.toAtom(cx); }
+ public Element build(BuildContext cx, NonTerminalNode cnt, boolean dropall) { return _e.build(cx, cnt, dropall); }
public String getFieldName() { return _e.getFieldName(); }
}
/** negation */
private class TildeNode extends ElementNodeWrapper {
public TildeNode(ElementNode e) { super(e); }
- public Atom toAtom(Context cx) { return (Atom)((Topology<Character>)_e.toAtom(cx).complement()); }
- public Element build(Context cx, NonTerminalNode cnt, boolean dropall) { return toAtom(cx); }
+ public Atom toAtom(BuildContext cx) { return (Atom)((Topology<Character>)_e.toAtom(cx).complement()); }
+ public Element build(BuildContext cx, NonTerminalNode cnt, boolean dropall) { return toAtom(cx); }
}
private class DropNode extends ElementNodeWrapper {
public DropNode(ElementNode e) { super(e); }
- public boolean isDropped(Context cx) { return true; }
+ public boolean isDropped(BuildContext cx) { return true; }
}
/** provides a label on the fields of a Seq */
//////////////////////////////////////////////////////////////////////////////
- public class Context {
+ public class BuildContext {
public HashMap<String,Union> map = new HashMap<String,Union>();
public GrammarNode grammar;
- public Context(Tree t) { }
- public Context(GrammarNode g) { this.grammar = g; }
+ public BuildContext(Tree t) { }
+ public BuildContext(GrammarNode g) { this.grammar = g; }
public Union build() {
Union ret = null;
for(NonTerminalNode nt : grammar.values()) {
projects / sbp.git / blobdiff