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 //StringBuffer sbs = new StringBuffer();
20 //((MetaGrammar)new MetaGrammar().walk(meta)).nt.get("e").toString(sbs);
21 //System.err.println(sbs);
22 String className = args[1].substring(args[1].lastIndexOf('.')+1);
23 String packageName = args[1].substring(0, args[1].lastIndexOf('.'));
24 String fileName = packageName.replace('.', '/') + "/" + className + ".java";
26 BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(fileName)));
27 StringBuffer out = new StringBuffer();
30 for(String s = br.readLine(); s != null; s = br.readLine()) {
31 if (s.indexOf("DO NOT EDIT STUFF BELOW: IT IS AUTOMATICALLY GENERATED") != -1 && s.indexOf("\"")==-1) skip = true;
32 if (s.indexOf("DO NOT EDIT STUFF ABOVE: IT IS AUTOMATICALLY GENERATED") != -1 && s.indexOf("\"")==-1) break;
33 if (!skip) out.append(s+"\n");
36 out.append("\n // DO NOT EDIT STUFF BELOW: IT IS AUTOMATICALLY GENERATED\n");
39 GrammarCompiler m = new GrammarCompiler();
40 Tree<String> res = new CharParser(MetaGrammar.make()).parse(new FileInputStream(args[0])).expand1();
41 MetaGrammar.Meta.MetaGrammarFile mgf = m.new MetaGrammarFile(res);
42 MetaGrammar.BuildContext bc = new MetaGrammar.BuildContext(mgf);
44 Union meta = mgf.get("s").build(bc);
45 Tree t = new CharParser(meta).parse(new FileInputStream(args[0])).expand1();
47 Tree t = MetaGrammarTree.meta;
48 Union u = MetaGrammar.make(t, "s");
51 System.err.println("== parsing with parsed grammar =================================================================================");
52 t = new CharParser((Union)u).parse(new FileInputStream(args[0])).expand1();
53 System.out.println(t.toPrettyString());
54 //Forest<String> fs = new CharParser(make()).parse(new FileInputStream(args[0]));
55 //System.out.println(fs.expand1());
57 //GraphViz gv = new GraphViz();
59 //FileOutputStream fox = new FileOutputStream("out.dot");
64 out.append("\n // DO NOT EDIT STUFF ABOVE: IT IS AUTOMATICALLY GENERATED\n");
66 for(String s = br.readLine(); s != null; s = br.readLine()) out.append(s+"\n");
69 OutputStream os = new FileOutputStream(fileName);
70 PrintWriter p = new PrintWriter(new OutputStreamWriter(os));
71 p.println(out.toString());
78 public static class Production {
80 public String nonTerminal;
81 public Object[] labels;
82 public boolean[] drops;
83 public Element[] elements;
85 public Production(String tag, String nonTerminal, Element[] elements, Object[] labels, boolean[] drops) {
87 this.elements = elements;
88 this.nonTerminal = nonTerminal;
91 for(int i=0; i<drops.length; i++)
97 public static class Target {
98 public int[] buildSequence(Production p) {
99 Annotation[][] annotations = _bindable.getArgAnnotations();
100 String[] names = _bindable.getArgNames();
101 String name = _bindable.getSimpleName();
102 int len = annotations.length;
104 bind.arg[] argtags = new bind.arg[len];
105 for(int i=0; i<names.length; i++)
106 for(Annotation a : annotations[i+ofs])
107 if (a instanceof bind.arg)
108 argtags[i+ofs] = (bind.arg)a;
109 return Target.this.buildSequence(p, names, argtags);
111 private Bindable _bindable;
113 public Target(Object o) { this(Bindable.create(o)); }
114 public Target(Bindable b) { this._bindable = b; }
116 public String getName() { return _bindable.getSimpleName(); }
117 public bind getBind() { return (bind)_bindable.getAnnotation(bind.class); }
118 public bind.as getBindAs() { return (bind.as)_bindable.getAnnotation(bind.as.class); }
119 public String toString() { return _bindable.getSimpleName(); }
120 public boolean isRaw() { return _bindable.isAnnotationPresent(bind.raw.class); }
122 public boolean isCompatible(Production p) {
123 bind.as t = getBindAs();
125 (t.value().equals(p.tag) ||
126 (t.value().equals("") && getName().equals(p.tag))))
127 return buildSequence(p)!=null;
130 System.out.println(_bindable.getClass().getSimpleName() + ": " + _bindable.getSimpleName());
131 if (b != null && getName().equals(p.tag))
132 return buildSequence(p)!=null;
134 bind.as n = getBindAs();
136 (n.value().equals(p.nonTerminal) ||
137 (n.value().equals("") && getName().equals(p.nonTerminal))))
138 return buildSequence(p)!=null;
140 if (b != null && getName().equals(p.nonTerminal))
141 return buildSequence(p)!=null;
146 public int[] buildSequence(Production p, String[] names, bind.arg[] argtags) {
148 for(int i=0; i<argtags.length; i++)
149 if (argtags[i] != null)
152 // FIXME: can be smarter here
153 if (names.length==p.count) {
154 int[] ret = new int[p.count];
155 for(int i=0; i<p.count; i++) ret[i] = i;
157 } else if (argTagged==p.count) {
158 int[] ret = new int[argtags.length];
160 for(int i=0; i<argtags.length; i++)
161 ret[i] = argtags[i]==null ? -1 : (j++);
167 public Sequence makeSequence(Production p) {
168 return Sequence.rewritingSequence(new TargetReducer(buildSequence(p), _bindable, isRaw()),
169 p.elements, p.labels, p.drops);
174 public static class TargetReducer implements Tree.TreeFunctor<Object,Object>, ToJava {
176 private Bindable _bindable;
177 private boolean _israw;
179 public void toJava(StringBuffer sb) {
180 sb.append("new MetaGrammar.TargetReducer(new int[] {");
181 for(int i=0; i<map.length; i++)
182 sb.append((i+"")+(i<map.length-1 ? "," : ""));
184 _bindable.toJava(sb);
186 sb.append(_israw ? "true" : "false");
190 public TargetReducer(int[] map, Bindable b, boolean raw) {
195 public String toString() { return "reducer-"+_bindable.toString(); }
196 public Object invoke(Iterable<Tree<Object>> t) {
197 if (_israw) return _bindable.impose(new Object[] { t });
198 ArrayList ret = new ArrayList();
200 if (tc.head() != null && tc.head() instanceof Functor)
201 ret.add(((Tree.TreeFunctor<Object,Object>)tc.head()).invoke(tc.children()));
202 else if (tc.numChildren() == 0)
205 System.err.println("FIXME: don't know what to do about " + tc);
209 System.err.println("input tree: " + t);
210 Object[] o = (Object[])ret.toArray(new Object[0]);
212 for(int i=0; i<map.length; i++) max = Math.max(map[i], max);
213 Object[] o2 = new Object[max+1];
214 for(int i=0; i<o.length; i++) o2[map[i]] = o[i];
215 return _bindable.impose(o2);
220 public static Union cached = null;
221 public static Union make() {
223 if (cached != null) return cached;
225 GrammarBindingResolver m = new GrammarBindingResolver();
226 Tree<String> res = new CharParser(MetaGrammar.make()).parse(new FileInputStream("tests/meta.g")).expand1();
227 MetaGrammar.Meta.MetaGrammarFile mgf = m.new MetaGrammarFile(res);
228 MetaGrammar.BuildContext bc = new MetaGrammar.BuildContext(mgf);
229 Union meta = mgf.get("s").build(bc);
230 Tree t = new CharParser(meta).parse(new FileInputStream("tests/meta.g")).expand1();
231 return cached = make(t, "s");
232 } catch (Exception e) {
233 throw new RuntimeException(e);
236 return make(MetaGrammarTree.meta, "s");
238 public static Union make(Tree t, String s) { return make(t, s, new AnnotationGrammarBindingResolver()); }
239 public static Union make(Tree t, String s, GrammarBindingResolver rm) {
240 System.out.println("Head: " + t.head());
241 Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
242 MetaGrammarBindings.Grammar g = (MetaGrammarBindings.Grammar)red.invoke(t.children());
243 Context cx = new Context(g,rm);
245 for(MetaGrammarBindings.NonTerminal nt : g.nonterminals) {
246 System.out.println(nt.name);
247 Union el = (Union)cx.get(nt.name);
248 StringBuffer st = new StringBuffer();
250 System.err.println(st);
251 if (nt.name.equals(s)) u = el;
258 public static class Context {
259 public HashMap<String,Union> map = new HashMap<String,Union>();
260 public MetaGrammarBindings.Grammar grammar;
261 public String cnt = null;
262 public GrammarBindingResolver rm;
263 public Context(MetaGrammarBindings.Grammar g, GrammarBindingResolver rm) {
267 public Union build() {
269 for(MetaGrammarBindings.NonTerminal nt : grammar.nonterminals) {
270 Union u = get(nt.name);
271 if ("s".equals(nt.name))
276 public Context(Tree t, GrammarBindingResolver rm) {
278 Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
279 this.grammar = (MetaGrammarBindings.Grammar)red.invoke(t.children());
281 public Union peek(String name) { return map.get(name); }
282 public void put(String name, Union u) { map.put(name, u); }
283 public Union get(String name) {
284 Union ret = map.get(name);
285 if (ret != null) return ret;
286 ret = new Union(name);
288 MetaGrammarBindings.NonTerminal nt = grammar.get(name);
290 System.err.println("*** warning could not find " + name);
301 /*private*/ static Atom infer(Element e) { return infer((Topology<Character>)Atom.toAtom(e)); }
302 /*private*/ static Atom infer(Topology<Character> t) { return new CharRange(new CharTopology(t)); }