/** The java classes typically used to represent a parsed grammar AST */
public class MetaGrammarBindings {
- public static class Grammar {
- public NonTerminal get(String s) {
- for(NonTerminal nt : nonterminals)
- if (nt.name.equals(s)) return nt;
- return null;
- }
- public NonTerminal[] nonterminals;
- public Grammar() { }
- public @bind Grammar(NonTerminal[] nonterminals) { this.nonterminals = nonterminals; }
+
+ /** A grammar (a set of nonterminals) */
+ public static class Grammar extends HashMap<String,NonTerminal> {
+ public @bind Grammar(NonTerminal[] nonterminals) {
+ for(NonTerminal nt : nonterminals) this.put(nt.name, nt); }
public String toString() {
String ret = "[ ";
- for(NonTerminal nt : nonterminals) ret += nt + ", ";
+ for(NonTerminal nt : values()) ret += nt + ", ";
return ret + " ]";
}
}
+
public abstract static class Un extends El {
public Seq[][] sequences;
public void build(MetaGrammar.Context cx, Union u) {
}
}
}
+
public static class NonTerminal extends Un {
public String name = null;
public @bind NonTerminal(@bind.arg String name,
}
}
- //public static @bind.as void range(char c) { }
public static class Range {
- public @bind.as("range") Range(char only) { first = only; last = only; }
- public @bind.as("-") Range(char first, char last) { this.first = first; this.last = last; }
+ public @bind Range(char only) { first = only; last = only; }
+ public @bind Range(char first, char last) { this.first = first; this.last = last; }
public char first;
public char last;
}
public static @bind.as(")") void close(String foo) { throw new Error("not supported"); }
public static @bind.as("()") El epsilon() { return new Constant(Union.epsilon); }
- public static @bind.as("nonTerminal") class NonTerminalReference extends El {
+ public static @bind class NonTerminalReference extends El {
public @bind.arg String nonTerminal;
public Element build(MetaGrammar.Context cx) {
return cx.get(nonTerminal);