Union meta = mgf.get("s").build(bc);
System.err.println("parsing " + s[1]);
- res = new CharParser(meta).parse(new FileInputStream(s[1])).expand1();
+ Tree t = new CharParser(meta).parse(new FileInputStream(s[1])).expand1();
- System.out.println(res);
+ System.out.println(t.toPrettyString());
+ Reducer red = (Reducer)t.head();
+ System.out.println(red.reduce(t));
}
public static class ReflectiveMeta extends MetaGrammar.Meta {
if (match((nonterminal)con.getAnnotation(nonterminal.class), c, s)) return true;
return false;
}
+ public Object repeatTag() {
+ return new Reducer() {
+ public String toString() { return "[**]"; }
+ public Object reduce(Tree t) {
+ Object[] ret = new Object[t.numChildren()];
+ for(int i=0; i<t.numChildren(); i++) {
+ Tree tc = t.child(i);
+ if (tc.head() != null && tc.head() instanceof Reducer)
+ ret[i] = ((Reducer)tc.head()).reduce(tc);
+ else if (tc.numChildren() == 0)
+ ret[i] = tc.head();
+ else {
+ System.err.println("FIXME: don't know what to do about " + tc);
+ ret[i] = null;
+ }
+ }
+ return ret;
+ }
+ };
+ }
public Sequence resolveTag(String tag, String nonTerminalName, Element[] els, Object[] labels, boolean[] drops) {
Production p = new Production(tag, nonTerminalName, els, labels, drops);
for(Method m : _cl.getMethods())
public abstract String getName();
public abstract tag getTag();
public abstract nonterminal getNonTerminal();
- public abstract boolean buildSequence(Production p);
- public abstract Sequence makeSequence(Production p);
+ public abstract int[] buildSequence(Production p);
public boolean isCompatible(Production p) {
tag t = getTag();
if (t != null &&
(t.value().equals(p.tag) ||
(t.value().equals("") && p.tag.equals(getName()))))
- return buildSequence(p);
+ return buildSequence(p)!=null;
nonterminal n = getNonTerminal();
if (n != null &&
(n.value().equals(p.nonTerminal) ||
(n.value().equals("") && p.nonTerminal.equals(getName()))))
- return buildSequence(p);
+ return buildSequence(p)!=null;
return false;
}
for(int i=0; i<p.count; i++) ret[i] = i;
return ret;
} else if (argTagged==p.count) {
- int[] ret = new int[argTagged];
+ int[] ret = new int[argtags.length];
int j = 0;
for(int i=0; i<argtags.length; i++)
- if (argtags[i]!=null)
- ret[j++] = i;
+ ret[i] = argtags[i]==null ? -1 : (j++);
return ret;
} else {
return null;
}
}
+ public Sequence makeSequence(Production p) {
+ return Sequence.rewritingSequence(new TargetReducer(p), p.elements, p.labels, p.drops);
+ }
+ public abstract Object plant(Object[] fields, int[] map);
+ public class TargetReducer implements Reducer {
+ private Production p;
+ private int[] map;
+ public TargetReducer(Production p) {
+ this.p = p;
+ this.map = buildSequence(p);
+ }
+ public String toString() { return "reducer-"+Target.this; }
+ public Object reduce(Tree t) {
+ Object[] objects = new Object[t.numChildren()];
+ for(int i=0; i<t.numChildren(); i++) {
+ Tree tc = t.child(i);
+ if (tc.head() != null && tc.head() instanceof Reducer)
+ objects[i] = ((Reducer)tc.head()).reduce(tc);
+ else if (tc.numChildren() == 0)
+ objects[i] = tc.head();
+ else if (t.numChildren()==1) {
+ //FIXME: EVIL!!
+ objects[i] = reduce(t.child(0));
+ } else {
+ System.err.println("FIXME: don't know what to do about " + tc);
+ objects[i] = null;
+ }
+ }
+ return plant(objects, map);
+ }
+ }
+ }
+
+ public static interface Reducer {
+ public Object reduce(Tree t);
}
+
public static class TargetClass extends Target {
public final Class _class;
public TargetClass(Class _class) { this._class = _class; }
public String getName() { return _class.getSimpleName(); }
public tag getTag() { return (tag)_class.getAnnotation(tag.class); }
public nonterminal getNonTerminal() { return (nonterminal)_class.getAnnotation(nonterminal.class); }
- public boolean buildSequence(Production p) {
+ public String toString() { return _class.getSimpleName(); }
+ public int[] buildSequence(Production p) {
Field[] f = _class.getDeclaredFields();
String[] names = new String[f.length];
arg[] argtags = new arg[f.length];
argtags[i] = f[i].getAnnotation(arg.class);
}
int[] ret = buildSequence(p, names, argtags);
- if (ret!=null) return true;
+ if (ret!=null) return ret;
for(Constructor c : _class.getConstructors())
- if (new TargetConstructor(c).buildSequence(p))
- return true;
- return false;
+ if (new TargetConstructor(c).buildSequence(p)!=null)
+ return new TargetConstructor(c).buildSequence(p);
+ return null;
}
- public Sequence makeSequence(Production p) {
- return Sequence.rewritingSequence(_class, p.elements, p.labels, p.drops);
+ public Object plant(Object[] fields, int[] map) {
+ try {
+ Object ret = _class.newInstance();
+ Field[] f = _class.getFields();
+ int j = 0;
+ for(int i=0; i<f.length; i++)
+ if (map[i] != -1) {
+ Object tgt = Reflection.lub(fields[map[i]]);
+ if (f[i].getType() == String.class) tgt = stringify(tgt);
+ // FUGLY
+ tgt = coerce(tgt, f[i].getType());
+ System.err.println("setting a " + f[i].getType().getName() + " to " + Reflection.show(tgt));
+ f[i].set(ret, tgt);
+ }
+ return ret;
+ } catch (Exception e) {
+ e.printStackTrace();
+ throw new RuntimeException(e);
+ }
}
}
+
+ public static String stringify(Object o) {
+ if (o==null) return "";
+ if (!(o instanceof Object[])) return o.toString();
+ Object[] arr = (Object[])o;
+ StringBuffer ret = new StringBuffer();
+ for(int i=0; i<arr.length; i++)
+ ret.append(arr[i]);
+ return ret.toString();
+ }
+
public static class TargetConstructor extends Target {
public final Constructor _ctor;
public TargetConstructor(Constructor _ctor) { this._ctor = _ctor; }
public String getName() { return _ctor.getName(); }
public tag getTag() { return (tag)_ctor.getAnnotation(tag.class); }
public nonterminal getNonTerminal() { return (nonterminal)_ctor.getAnnotation(nonterminal.class); }
- public boolean buildSequence(Production p) {
+ public String toString() { return _ctor.getName(); }
+ public int[] buildSequence(Production p) {
Annotation[][] annotations = _ctor.getParameterAnnotations();
int len = annotations.length;
int ofs = 0;
String name = _ctor.getDeclaringClass().getName();
+ /*
if (name.indexOf('$') > name.lastIndexOf('.')) {
len--;
ofs++;
}
+ */
String[] names = new String[len];
arg[] argtags = new arg[len];
for(int i=0; i<names.length; i++)
for(Annotation a : annotations[i+ofs])
if (a instanceof arg)
argtags[i+ofs] = (arg)a;
- int[] ret = buildSequence(p, names, argtags);
- if (ret!=null) return true;
- return false;
+ return buildSequence(p, names, argtags);
}
- public Sequence makeSequence(Production p) {
- return Sequence.rewritingSequence(_ctor, p.elements, p.labels, p.drops);
+ public Object plant(Object[] fields, int[] map) {
+ try {
+ Class[] argTypes = _ctor.getParameterTypes();
+ Object[] args = new Object[argTypes.length];
+ int j = 0;
+ for(int i=0; i<args.length; i++)
+ if (map[i] != -1) {
+ Object tgt = Reflection.lub(fields[map[i]]);
+ if (argTypes[i] == String.class) tgt = stringify(tgt);
+ // FUGLY
+ tgt = coerce(tgt, argTypes[i]);
+ System.err.println("setting a " + argTypes[i].getName() + " to " + Reflection.show(tgt));
+ args[i] = tgt;
+ }
+ return _ctor.newInstance(args);
+ } catch (Exception e) {
+ throw new RuntimeException(e);
+ }
}
}
public static class TargetMethod extends Target {
public final Method _method;
public TargetMethod(Method _method) { this._method = _method; }
public String getName() { return _method.getName(); }
+ public String toString() { return _method.getName(); }
public tag getTag() { return (tag)_method.getAnnotation(tag.class); }
public nonterminal getNonTerminal() { return (nonterminal)_method.getAnnotation(nonterminal.class); }
- public boolean buildSequence(Production p) {
+ public int[] buildSequence(Production p) {
Annotation[][] annotations = _method.getParameterAnnotations();
String[] names = new String[annotations.length];
arg[] argtags = new arg[annotations.length];
if (a instanceof arg)
argtags[i] = (arg)a;
int[] ret = buildSequence(p, names, argtags);
- if (ret!=null) return true;
- return false;
+ return ret;
}
- public Sequence makeSequence(Production p) {
- return Sequence.rewritingSequence(_method, p.elements, p.labels, p.drops);
+ public Object plant(Object[] fields, int[] map) {
+ try {
+ Class[] argTypes = _method.getParameterTypes();
+ Object[] args = new Object[argTypes.length];
+ int j = 0;
+ for(int i=0; i<args.length; i++)
+ if (map[i] != -1) {
+ Object tgt = Reflection.lub(fields[map[i]]);
+ if (argTypes[i] == String.class) tgt = stringify(tgt);
+ // FUGLY
+ tgt = coerce(tgt, argTypes[i]);
+ System.err.println("setting a " + argTypes[i].getName() + " to " + Reflection.show(tgt));
+ args[i] = tgt;
+ }
+ return _method.invoke(null, args);
+ } catch (Exception e) {
+ throw new RuntimeException(e);
+ }
}
}
- public class MG {
- public @tag void grammar(Grammar g) { }
- public @nonterminal void Grammar(NonTerminal[] n) { }
- public @nonterminal class Grammar {
+ public static Object coerce(Object o, Class c) {
+ if (o==null) return null;
+ if (c.isInstance(o)) return o;
+ if (c == char.class) {
+ return o.toString().charAt(0);
+ }
+ if (c.isArray() && (c.getComponentType().isInstance(o))) {
+ Object[] ret = (Object[])Array.newInstance(c.getComponentType(), 1);
+ ret[0] = o;
+ return ret;
+ }
+ if (o.getClass().isArray() && c.isArray()) {
+ boolean ok = true;
+ for(int i=0; i<((Object[])o).length; i++) {
+ Object ob = (((Object[])o)[i]);
+ if (ob != null) {
+ System.err.println("no hit with " + c.getComponentType().getName() + " on " + Reflection.show(((Object[])o)[i]));
+ ok = false;
+ }
+ }
+ if (ok) {
+ System.err.println("hit with " + c.getComponentType().getName());
+ return Array.newInstance(c.getComponentType(), ((Object[])o).length);
+ }
+ }
+ return o;
+ }
+
+ public static class MG {
+ public static @tag Grammar grammar(Grammar g) { return g; }
+ public static @nonterminal class Grammar {
public @arg("NonTerminal") NonTerminal[] nonterminals;
+ public String toString() {
+ String ret = "[ ";
+ for(NonTerminal nt : nonterminals) ret += nt + ", ";
+ return ret + " ]";
+ }
}
- public @nonterminal class NonTerminal {
+ public static @nonterminal class NonTerminal extends El {
public @arg("Word") String name;
public @arg("RHS") Seq[][] sequences;
}
- public @tag void range(char c) { }
- public @nonterminal class Range {
+ public static @tag void range(char c) { }
+ public static class Range extends El {
public @tag("range") Range(char only) { first = only; last = only; }
- public @arg char first;
- public @arg char last;
+ public @tag("-") Range(char first, char last) { this.first = first; this.last = last; }
+ public char first;
+ public char last;
}
- public class El { }
- public abstract @nonterminal("Sequence") class Seq { }
- public @tag("&") Seq and(Sequence s, Element[] elements) { return null; }
- public @tag("&~") Seq andnot(Sequence s, Element[] elements) { return null; }
- public @tag Seq ps(Element[] elements) { return null; }
- public @tag("::") Seq tag(String tagname, Seq seq) { return null; }
- public @tag(":") void colon(String s, Element e) { }
- public @tag(")") void close(String foo) { }
- public @tag("/") Seq slash(Seq s, Element e) { return null; }
- public @tag("->") Seq arrow(Seq s, Element e) { return null; }
+ public static class El { }
+ public static /*abstract*/ @nonterminal("Sequence") class Seq extends El { }
+ public static @tag("&") Seq and(Sequence s, El[] elements) { return new Seq(); }
+ public static @tag("&~") Seq andnot(Sequence s, El[] elements) { return new Seq(); }
+ public static @tag Seq ps(El[] elements) { return new Seq(); }
+ public static @tag Seq psx(Seq s) { return s; }
+ public static @tag("::") Seq tag(String tagname, Seq seq) { return new Seq(); }
+ public static @tag(":") void colon(String s, El e) { }
+ public static @tag(")") void close(String foo) { }
+ public static @tag("/") Seq slash(Seq s, El e) { return new Seq(); }
+ public static @tag("->") Seq arrow(Seq s, El e) { return new Seq(); }
- public @tag("nonTerminal") class NonTerminalReference { public @arg String nonTerminal; }
- public @tag("literal") class StringLiteral { public @arg String string; }
- public @tag("()") class Epsilon { }
- public @tag("{") class Tree { @arg Seq body; }
- public @tag("[") class CharClass { public CharClass(Range[] ranges) { } }
+ public static @tag("nonTerminal") class NonTerminalReference extends El { public @arg String nonTerminal; }
+ public static @tag("literal") class StringLiteral extends El { public @arg String string; }
+ public static @tag("()") class Epsilon extends El { }
+ public static @tag("{") class Tree extends El { public @arg Seq body; }
+ public static class CharClass extends El { public @tag("[") CharClass(Range[] ranges) { } }
- public @tag("++") void plusmax(El e) { }
- public @tag("+") void plus(El e) { }
- public @tag("++/") void plusmaxfollow(El e, El sep) { }
- public @tag("+/") void plusfollow(El e, El sep) { }
- public @tag("**") void starmax(El e) { }
- public @tag("*") void star(El e) { }
- public @tag("**/") void starmaxfollow(El e, El sep) { }
- public @tag("*/") void starfollow(El e, El sep) { }
- public @tag("!") void bang(El e) { }
- public @tag("?") void question(El e) { }
- public @tag("^") void caret(String s) { }
- public @tag("~") void tilde(El e) { }
- public @tag("^^") void doublecaret(El e) { }
- public @tag("(") void subexpression(Seq[][] rhs) { }
+ public static @tag("++") void plusmax(El e) { }
+ public static @tag("+") void plus(El e) { }
+ public static @tag("++/") void plusmaxfollow(El e, El sep) { }
+ public static @tag("+/") void plusfollow(El e, El sep) { }
+ public static @tag("**") void starmax(El e) { }
+ public static @tag("*") void star(El e) { }
+ public static @tag("**/") void starmaxfollow(El e, El sep) { }
+ public static @tag("*/") void starfollow(El e, El sep) { }
+ public static @tag("!") void bang(El e) { }
+ public static @tag("?") void question(El e) { }
+ public static @tag("^") void caret(String s) { }
+ public static @tag("~") void tilde(El e) { }
+ public static @tag("^^") void doublecaret(El e) { }
+ public static @tag("(") void subexpression(Seq[][] rhs) { }
- public @nonterminal("Word") String word(String s) { return null; }
- public @nonterminal("Quoted") String quoted(String s) { return null; }
- public @nonterminal("escaped") String c(char c) { return null; }
- public @tag("\"\"") String emptystring() { return null; }
- public @tag("\r") String lf() { return null; }
- public @tag("\n") String cr() { return null; }
+ public static @nonterminal("Word") String word(String s) { return null; }
+ public static @nonterminal("Quoted") String quoted(String s) { return null; }
+ public static @nonterminal("escaped") String c(char c) { return null; }
+ public static @tag("\"\"") String emptystring() { return null; }
+ public static @tag("\r") String lf() { return null; }
+ public static @tag("\n") String cr() { return null; }
}
}
projects / sbp.git / commitdiff