1 package edu.berkeley.sbp.meta;
2 import edu.berkeley.sbp.util.*;
3 import edu.berkeley.sbp.*;
4 import edu.berkeley.sbp.chr.*;
5 import edu.berkeley.sbp.misc.*;
6 import edu.berkeley.sbp.bind.*;
8 import java.lang.annotation.*;
9 import java.lang.reflect.*;
12 public class MetaGrammar {
14 public static void main(String[] args) throws Exception {
15 if (args.length != 2) {
16 System.err.println("usage: java " + MetaGrammar.class.getName() + " grammarfile.g com.yourdomain.package.ClassName");
19 String className = args[1].substring(args[1].lastIndexOf('.')+1);
20 String packageName = args[1].substring(0, args[1].lastIndexOf('.'));
21 String fileName = packageName.replace('.', '/') + "/" + className + ".java";
23 BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(fileName)));
24 StringBuffer out = new StringBuffer();
27 for(String s = br.readLine(); s != null; s = br.readLine()) {
28 if (s.indexOf("DO NOT EDIT STUFF BELOW: IT IS AUTOMATICALLY GENERATED") != -1 && s.indexOf("\"")==-1) skip = true;
29 if (s.indexOf("DO NOT EDIT STUFF ABOVE: IT IS AUTOMATICALLY GENERATED") != -1 && s.indexOf("\"")==-1) break;
30 if (!skip) out.append(s+"\n");
33 out.append("\n // DO NOT EDIT STUFF BELOW: IT IS AUTOMATICALLY GENERATED\n");
35 Tree t = MetaGrammarTree.meta;
36 Union u = MetaGrammar.make(t, "s");
39 System.err.println("== parsing with parsed grammar =================================================================================");
40 t = new CharParser((Union)u).parse(new FileInputStream(args[0])).expand1();
41 System.out.println(t.toPrettyString());
44 out.append("\n // DO NOT EDIT STUFF ABOVE: IT IS AUTOMATICALLY GENERATED\n");
46 for(String s = br.readLine(); s != null; s = br.readLine()) out.append(s+"\n");
49 OutputStream os = new FileOutputStream(fileName);
50 PrintWriter p = new PrintWriter(new OutputStreamWriter(os));
51 p.println(out.toString());
56 public static class TreeBindable {
58 private Bindable _bindable;
59 public TreeBindable(Object o) { this(Bindable.create(o)); }
60 public TreeBindable(Bindable b) { this._bindable = b; }
62 private int[] buildSequence(Production p) {
63 return p.buildSequence(_bindable);
66 public String getName() { return _bindable.getSimpleName(); }
67 public bind getBind() { return (bind)_bindable.getAnnotation(bind.class); }
68 public bind.as getBindAs() { return (bind.as)_bindable.getAnnotation(bind.as.class); }
69 public String toString() { return _bindable.getSimpleName(); }
70 public boolean isRaw() { return _bindable.isAnnotationPresent(bind.raw.class); }
72 public boolean isCompatible(Production p) {
73 bind.as t = getBindAs();
77 (t.value().equals(p.tag)))
78 return buildSequence(p)!=null;
81 ((t.value().equals("") && getName().equals(p.tag))))
82 return buildSequence(p)!=null;
83 if (b != null && getName().equals(p.tag))
84 return buildSequence(p)!=null;
87 (t.value().equals(p.tag)))
88 return buildSequence(p)!=null;
90 ((t.value().equals("") && getName().equals(p.tag))))
91 return buildSequence(p)!=null;
92 if (b != null && getName().equals(p.tag))
93 return buildSequence(p)!=null;
98 public Sequence makeSequence(final Production p) {
100 if (_bindable.getArgTypes().length > 0 &&
101 _bindable.getArgTypes()[0] == Input.Region.class) {
102 Functor<Input.Region,Object> func = new Functor<Input.Region,Object>() {
103 public Object invoke(final Input.Region region) {
105 new TreeBindableReducer(buildSequence(p),
108 public Object invoke(Iterable<Tree<Object>> t) {
109 ArrayList ret = new ArrayList();
112 if (tc.head() != null && tc.head() instanceof Functor)
113 ret.add(((Tree.TreeFunctor<Object,Object>)tc.head()).invoke(tc.children()));
114 else if (tc.numChildren() == 0)
117 System.err.println("FIXME: don't know what to do about " + tc);
121 Object[] o = (Object[])ret.toArray(new Object[0]);
123 for(int i=0; i<map.length; i++) max = Math.max(map[i], max);
124 Object[] o2 = new Object[max+2];
125 for(int i=0; i<o.length; i++) o2[map[i]+1] = o[i];
127 return _bindable.impose(o2);
132 return Sequence.regionRewritingSequence(func,
138 return Sequence.rewritingSequence(new Tree.BindingFunctor(_bindable.createBinding()),
141 return Sequence.rewritingSequence(new TreeBindableReducer(buildSequence(p),
149 public static class TreeBindableReducer implements Tree.TreeFunctor<Object,Object>, ToJava {
153 public void toJava(StringBuffer sb) {
154 sb.append("new MetaGrammar.TreeBindableReducer(new int[] {");
155 for(int i=0; i<map.length; i++) sb.append((i+"")+(i<map.length-1 ? "," : ""));
157 _bindable.toJava(sb);
161 public TreeBindableReducer(int[] map, Bindable b) { this(map,b, false); }
162 public TreeBindableReducer(int[] map, Bindable b, boolean raw) {
166 public String toString() { return "reducer-"+_bindable.toString(); }
167 public Object invoke(Iterable<Tree<Object>> t) {
168 ArrayList ret = new ArrayList();
170 if (tc.head() != null && tc.head() instanceof Functor)
171 ret.add(((Tree.TreeFunctor<Object,Object>)tc.head()).invoke(tc.children()));
172 else if (tc.numChildren() == 0)
175 System.err.println("FIXME: don't know what to do about " + tc);
179 Object[] o = (Object[])ret.toArray(new Object[0]);
180 return _bindable.createBinding(map).invoke(o);
185 public static Union make() { return make(MetaGrammarTree.meta, "s"); }
186 public static Union make(Tree t, String s) { return make(t, s, new AnnotationGrammarBindingResolver(MetaGrammarBindings.class)); }
187 public static Union make(Tree t, String s, GrammarBindingResolver rm) {
188 Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
189 MetaGrammarBindings.GrammarNode g = (MetaGrammarBindings.GrammarNode)red.invoke(t.children());
190 return g.build(s, rm);