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() {
if (as==null) as = "";
else if ("".equals(as)) { }
else as = as +".";
-
- System.err.println("#import " + fileName + " as " + as);
+
try {
Tree t = new CharParser(MetaGrammar.newInstance()).parse(new FileInputStream("tests/"+fileName)).expand1();
Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
}
}
- 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;
public static @bind.as("^") ElementNode caret(final String s) {
final String thePrefix = prefix;
- return new Drop(new Constant(CharRange.string(s)) {
+ return new Constant(CharRange.string(s)) {
public String getOwnerTag() { return thePrefix+s; }
- });
+ public boolean drop() { return true; }
+ };
}
public static @bind.as("~") ElementNode tilde(final ElementNode e) {
}
+ 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 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 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 abstract static class PostProcess extends ElementNode {
+
+ public abstract static class PostProcess extends ElementNodeWrapper {
ElementNode e;
- public PostProcess(ElementNode e) { this.e = e; }
- public Element build(Context cx, NonTerminalNode cnt) { return postProcess(e.build(cx, cnt)); }
+ 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 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 static class Drop extends ElementNodeWrapper {
+ public Drop(ElementNode e) { super(e); }
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 static class Label extends ElementNodeWrapper {
public String label;
- public ElementNode e;
- public Label(String label, ElementNode e) { this.e = e; this.label = label; }
+ public Label(String label, ElementNode e) { super(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); }
}
}