import java.io.*;
public class Demo {
+
+ public static boolean harsh = false;
+
public static void main(String[] s) throws Exception {
+
+ ReflectiveMeta m = new ReflectiveMeta();
Tree<String> res = new CharParser(MetaGrammar.make()).parse(new FileInputStream(s[0])).expand1();
-
- ReflectiveMeta m =
- new ReflectiveMeta(MG.class,
- new Class[] {
- MG.Grammar.class,
- MG.NonTerminal.class,
- MG.AnonUn.class,
- MG.Range.class,
- MG.El.class,
- MG.Seq.class,
- MG.NonTerminalReference.class,
- MG.StringLiteral.class,
- MG.Tree.class,
- MG.CharClass.class
- });
MetaGrammar.Meta.MetaGrammarFile mgf = m.new MetaGrammarFile(res);
MetaGrammar.BuildContext bc = new MetaGrammar.BuildContext(mgf);
- Union meta = mgf.get("s").build(bc);
- System.err.println("parsing " + s[1]);
+ Union meta = mgf.get("s").build(bc);
Tree t = new CharParser(meta).parse(new FileInputStream(s[1])).expand1();
- System.out.println("tree:\n" + t.toPrettyString());
-
- Reducer red = (Reducer)t.head();
- MG.Grammar g = (MG.Grammar)red.reduce(t);
- System.out.println(g);
-
- Context cx = new Context(g,m);
- Element u = null;
- for(MG.NonTerminal nt : g.nonterminals) {
- Union el = (Union)cx.get(nt.name);
- StringBuffer st = new StringBuffer();
- el.toString(st);
- System.err.println(st);
- if (nt.name.equals("s")) u = el;
- }
- System.err.println();
+ Union u = Demo.make(t, "s");
+
+ System.err.println();
System.err.println("== parsing with parsed grammar =================================================================================");
t = new CharParser((Union)u).parse(new FileInputStream(s[1])).expand1();
System.out.println(t.toPrettyString());
System.out.println(t.toPrettyString());
}
+ public static class ReflectiveMetaPlain extends ReflectiveMeta {
+ public Object repeatTag() { return null; }
+ public Sequence tryResolveTag(String tag, String nonTerminalName, Element[] els, Object[] labels, boolean[] drops) {
+ return null; }
+ public Sequence resolveTag(String tag, String nonTerminalName, Element[] els, Object[] labels, boolean[] drops) {
+ return Sequence.rewritingSequence(tag, els, labels, drops);
+ }
+ }
+
public static class ReflectiveMeta extends MetaGrammar.Meta {
private final Class _cl;
private final Class[] _inner;
+ public ReflectiveMeta() {
+ this(MG.class,
+ new Class[] {
+ MG.Grammar.class,
+ MG.AnonUn.class,
+ MG.Range.class,
+ MG.El.class,
+ MG.Seq.class,
+ MG.NonTerminal.class,
+ MG.NonTerminalReference.class,
+ MG.StringLiteral.class,
+ MG.XTree.class,
+ MG.CharClass.class
+ });
+ }
public ReflectiveMeta(Class c, Class[] inner) {
this._cl = c;
this._inner = inner;
if (c != null && t.equals("") && c.getSimpleName().equals(s)) return true;
return false;
}
+ /*
private boolean match(nonterminal t, Class c, String s) {
if (t==null) return false;
if (t.value().equals(s)) return true;
if (c != null && t.equals("") && c.getSimpleName().equals(s)) return true;
return false;
}
+ */
private boolean match(Class c, String s, String nonTerminalName) {
if (match((tag)c.getAnnotation(tag.class), c, s)) return true;
- if (match((nonterminal)c.getAnnotation(nonterminal.class), c, nonTerminalName)) return true;
+ //if (match((nonterminal)c.getAnnotation(tag.class), c, nonTerminalName)) return true;
return false;
}
public boolean match(Constructor con, String s, String nonTerminalName) {
Class c = con.getDeclaringClass();
if (match((tag)con.getAnnotation(tag.class), null, s)) return true;
- if (match((nonterminal)con.getAnnotation(nonterminal.class), c, s)) return true;
+ //if (match((nonterminal)con.getAnnotation(tag.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;
- }
- };
+ return new Tree.ArrayBuildingTreeFunctor<Object>();
}
- public Sequence resolveTag(String tag, String nonTerminalName, Element[] els, Object[] labels, boolean[] drops) {
+ public Sequence tryResolveTag(String tag, String nonTerminalName, Element[] els, Object[] labels, boolean[] drops) {
Production p = new Production(tag, nonTerminalName, els, labels, drops);
for(Method m : _cl.getMethods())
if (new TargetMethod(m).isCompatible(p))
for(Class c : _inner)
if (new TargetClass(c).isCompatible(p))
return new TargetClass(c).makeSequence(p);
- throw new RuntimeException("could not find a Java method/class/ctor matching tag \""+tag+"\", nonterminal \""+nonTerminalName+"\" with " + els.length + " arguments");
+ return null;
+ }
+ public Sequence resolveTag(String tag, String nonTerminalName, Element[] els, Object[] labels, boolean[] drops) {
+ Sequence ret = tryResolveTag(tag, nonTerminalName, els, labels, drops);
+ if (ret != null) return ret;
+ String message = "could not find a Java method/class/ctor matching tag \""+tag+
+ "\", nonterminal \""+nonTerminalName+"\" with " + els.length + " arguments";
+ if (harsh) {
+ throw new RuntimeException(message);
+ } else {
+ System.err.println(message);
+ return Sequence.rewritingSequence(tag, els, labels, drops);
+ }
}
}
- /*
- public static Object makeFlattener(final Method m, final Element[] els, final Object[] labels, final boolean[] drops) {
- return new Reducer() {
- public Object reduce(Tree t) {
- Object[] o = new Object[m.getParameterTypes()];
- int j = 0;
- for(int i=0; i<els.length; i++)
- }
- };
- }
- */
/**
* that is arg-compatible. If value() is undefined, then the
* class/constructor/method name is used.
*/
+ /*
@Retention(RetentionPolicy.RUNTIME) public static @interface nonterminal { String value() default ""; }
+ */
+
+ @Retention(RetentionPolicy.RUNTIME) public static @interface raw { }
/**
* Constructors, classes, and methods with this attribute will
}
public static abstract class Target {
- public abstract String getName();
- public abstract tag getTag();
- public abstract nonterminal getNonTerminal();
public abstract int[] buildSequence(Production p);
+ private Reflection.Bindable _bindable;
+ public Target(Reflection.Bindable b) { this._bindable = b; }
+
+ public String getName() { return _bindable.getSimpleName(); }
+ public tag getTag() { return (tag)_bindable.getAnnotation(tag.class); }
+ //public nonterminal getNonTerminal() { return (nonterminal)_bindable.getAnnotation(tag.class); }
+ public String toString() { return _bindable.getSimpleName(); }
+ public Object plant(Object[] fields) { return _bindable.impose(fields); }
+ public boolean isRaw() { return _bindable.isAnnotationPresent(raw.class); }
+ public Object invokeRaw(Iterable<Tree<Object>> t) { return _bindable.impose(new Object[] { t }); }
+
public boolean isCompatible(Production p) {
tag t = getTag();
if (t != null &&
(t.value().equals(p.tag) ||
- (t.value().equals("") && p.tag.equals(getName()))))
+ (t.value().equals("") && getName().equals(p.tag))))
return buildSequence(p)!=null;
- nonterminal n = getNonTerminal();
+ tag n = getTag();
if (n != null &&
(n.value().equals(p.nonTerminal) ||
- (n.value().equals("") && p.nonTerminal.equals(getName()))))
+ (n.value().equals("") && getName().equals(p.nonTerminal))))
return buildSequence(p)!=null;
return false;
}
+
public int[] buildSequence(Production p, String[] names, arg[] argtags) {
int argTagged = 0;
for(int i=0; i<argtags.length; i++)
}
}
public Sequence makeSequence(Production p) {
- return Sequence.rewritingSequence(new TargetReducer(p), p.elements, p.labels, p.drops);
+ return Sequence.rewritingSequence(new TargetReducer(p, buildSequence(p), "reducer-"+this),
+ p.elements, p.labels, p.drops);
}
- public abstract Object plant(Object[] fields, int[] map);
- public class TargetReducer implements Reducer {
+
+ public class TargetReducer implements Tree.TreeFunctor<Object,Object> {
private Production p;
private int[] map;
- public TargetReducer(Production p) {
+ private String name;
+ public TargetReducer(Production p, int[] map, String name) {
this.p = p;
- this.map = buildSequence(p);
+ this.map = map;
+ this.name = name;
}
- 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);
+ public String toString() { return name; }
+ public Object invoke(Iterable<Tree<Object>> t) {
+ if (isRaw()) return invokeRaw(t);
+ ArrayList ret = new ArrayList();
+ for(Tree tc : t) {
+ if (tc.head() != null && tc.head() instanceof Functor)
+ ret.add(((Tree.TreeFunctor<Object,Object>)tc.head()).invoke(tc.children()));
else if (tc.numChildren() == 0)
- objects[i] = tc.head();
+ ret.add(tc.head());
else {
System.err.println("FIXME: don't know what to do about " + tc);
- objects[i] = null;
+ ret.add(null);
}
}
System.err.println("input tree: " + t);
- return plant(objects, map);
+ Object[] o = (Object[])ret.toArray(new Object[0]);
+ int max = 0;
+ for(int i=0; i<map.length; i++) max = Math.max(map[i], max);
+ Object[] o2 = new Object[max+1];
+ for(int i=0; i<o.length; i++) o2[map[i]] = o[i];
+ return plant(o2);
}
}
}
- 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 String toString() { return _class.getSimpleName(); }
+ public TargetClass(Class _class) { super(Reflection.Bindable.create(_class)); this._class = _class; }
public int[] buildSequence(Production p) {
Field[] f = _class.getDeclaredFields();
String[] names = new String[f.length];
return new TargetConstructor(c).buildSequence(p);
return null;
}
- 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 String toString() { return _ctor.getName(); }
+ public TargetConstructor(Constructor _ctor) { super(Reflection.Bindable.create(_ctor)); this._ctor = _ctor; }
public int[] buildSequence(Production p) {
Annotation[][] annotations = _ctor.getParameterAnnotations();
int len = annotations.length;
argtags[i+ofs] = (arg)a;
return buildSequence(p, names, argtags);
}
- 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 TargetMethod(Method _method) { super(Reflection.Bindable.create(_method)); this._method = _method; }
public int[] buildSequence(Production p) {
Annotation[][] annotations = _method.getParameterAnnotations();
String[] names = new String[annotations.length];
int[] ret = buildSequence(p, names, argtags);
return ret;
}
- 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;
- }
- System.err.println("invoking " + _method + " with " + Reflection.show(args));
- return _method.invoke(null, args);
- } catch (Exception e) {
- throw new RuntimeException(e);
- }
- }
}
- 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);
+ public static Union cached = null;
+ public static Union make() {
+ if (cached != null) return cached;
+ try {
+ ReflectiveMeta m = new ReflectiveMeta();
+ Tree<String> res = new CharParser(MetaGrammar.make()).parse(new FileInputStream("tests/meta.g")).expand1();
+ MetaGrammar.Meta.MetaGrammarFile mgf = m.new MetaGrammarFile(res);
+ MetaGrammar.BuildContext bc = new MetaGrammar.BuildContext(mgf);
+ Union meta = mgf.get("s").build(bc);
+ Tree t = new CharParser(meta).parse(new FileInputStream("tests/meta.g")).expand1();
+ return cached = make(t, "s");
+ } catch (Exception e) {
+ throw new RuntimeException(e);
}
- 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);
- }
+ }
+ public static Union make(Tree t, String s) { return make(t, s, new ReflectiveMeta()); }
+ public static Union make(Tree t, String s, ReflectiveMeta rm) {
+ Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
+ MG.Grammar g = (MG.Grammar)red.invoke(t.children());
+ Context cx = new Context(g,rm);
+ Union u = null;
+ for(MG.NonTerminal nt : g.nonterminals) {
+ System.out.println(nt.name);
+ Union el = (Union)cx.get(nt.name);
+ StringBuffer st = new StringBuffer();
+ el.toString(st);
+ System.err.println(st);
+ if (nt.name.equals(s)) u = el;
}
- return o;
+ return u;
}
public static class MG {
Union u2 = new Union();
if (sequences.length==1) u2 = u;
for(int j=0; j<group.length; j++) {
- group[j].build(cx, u2);
+ group[j].build(cx, u2, false);
}
if (sequences.length==1) break;
Sequence seq = Sequence.singleton(u2);
}
public static class NonTerminal extends Un {
public String name = null;
- public @nonterminal("NonTerminal") NonTerminal(@arg("Word") String name,
- @arg("RHS") Seq[][] sequences) {
+ public @tag("=") NonTerminal(@arg("Word") String name,
+ @arg("RHS") Seq[][] sequences) {
this.name = name;
this.sequences = sequences;
}
this.elements = elements;
return this;
}
- public Sequence build(Context cx, Union u) {
- Sequence ret = build0(cx);
- for(Seq s : and) { Sequence dork = s.build(cx, u); dork.lame = true; ret = ret.and(dork); }
- for(Seq s : not) { Sequence dork = s.build(cx, u); dork.lame = true; ret = ret.not(dork); }
+ 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); }
u.add(ret);
+ ret.lame = lame;
return ret;
}
- public Sequence build0(Context cx) {
+ public Sequence build0(Context cx, boolean lame) {
boolean unwrap = false;
- boolean dropAll = false;
+ boolean dropAll = lame;
if (tag!=null && tag.equals("[]")) unwrap = true;
if (tag!=null && "()".equals(tag)) dropAll = true;
Object[] labels = new Object[elements.length];
return cx.get(nonTerminal);
}
}
+
public static class StringLiteral extends Constant {
public @tag("literal") StringLiteral(String string) { super(CharRange.string(string)); }
public boolean drop() { return true; }
}
+
public static class CharClass extends El {
Range[] ranges;
public @tag("[") CharClass(Range[] ranges) { this.ranges = ranges; }
}
}
- public static @tag("{") class Tree extends El {
+ public static @tag("{") class XTree extends El {
public @arg Seq body;
public Element build(Context cx) {
throw new Error();
//public static @tag("(") El subexpression(Seq[][] rhs) { return new NonTerminal(rhs); }
- public static @nonterminal("Word") String word(String s) { return s; }
- public static @nonterminal("Quoted") String quoted(String s) { return s; }
- public static @nonterminal("escaped") String c(char c) { return c+""; }
+ public static @tag("Word") String word(String s) { return s; }
+ public static @tag("Quoted") String quoted(String s) { return s; }
+ public static @tag("escaped") String c(char c) { return c+""; }
public static @tag("\"\"") String emptystring() { return ""; }
public static @tag("\n") String retur() { return "\n"; }
public static @tag("\r") String lf() { return "\r"; }
}
public Context(Tree t, ReflectiveMeta rm) {
this.rm = rm;
- Reducer red = (Reducer)t.head();
- this.grammar = (MG.Grammar)red.reduce(t);
+ Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
+ this.grammar = (MG.Grammar)red.invoke(t.children());
}
public Union peek(String name) { return map.get(name); }
public void put(String name, Union u) { map.put(name, u); }
projects / sbp.git / blobdiff