- public static class Context {
- public HashMap<String,Union> map = new HashMap<String,Union>();
- public MetaGrammarBindings.GrammarNode grammar;
- public String cnt = null;
- public GrammarBindingResolver rm;
- public Context(MetaGrammarBindings.GrammarNode g, GrammarBindingResolver rm) {
- this.grammar = g;
- this.rm = rm;
- }
- public Union build() {
- Union ret = null;
- for(MetaGrammarBindings.NonTerminalNode nt : grammar.values()) {
- Union u = get(nt.name);
- if ("s".equals(nt.name))
- ret = u;
- }
- return ret;
- }
- public Context(Tree t, GrammarBindingResolver rm) {
- this.rm = rm;
- Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
- this.grammar = (MetaGrammarBindings.GrammarNode)red.invoke(t.children());
- }
- public Union peek(String name) { return map.get(name); }
- public void put(String name, Union u) { map.put(name, u); }
- public Union get(String name) {
- Union ret = map.get(name);
- if (ret != null) return ret;
- ret = new Union(name);
- map.put(name, ret);
- MetaGrammarBindings.NonTerminalNode nt = grammar.get(name);
- if (nt==null) {
- System.err.println("*** warning could not find " + name);
- } else {
- String old = cnt;
- cnt = name;
- nt.build(this, ret);
- cnt = old;
- }
- return ret;
- }
-
- }
- /*private*/ static Atom infer(Element e) { return infer((Topology<Character>)Atom.toAtom(e)); }
- /*private*/ static Atom infer(Topology<Character> t) { return new CharRange(new CharTopology(t)); }