StructSymbol.java

package test.antlr.pie;
/***
 * Excerpted from "Language Implementation Patterns",
 * published by The Pragmatic Bookshelf.
 * Copyrights apply to this code. It may not be used to create training material, 
 * courses, books, articles, and the like. Contact us if you are in doubt.
 * We make no guarantees that this code is fit for any purpose. 
 * Visit http://www.pragmaticprogrammer.com/titles/tpdsl for more book information.
***/
import java.util.Map;
import java.util.LinkedHashMap;

public class StructSymbol extends ScopedSymbol implements Scope {
    Map<String, Symbol> fields = new LinkedHashMap<String, Symbol>();
    public StructSymbol(String name,Scope parent) {super(name, parent);}
    /** For a.b, only look in a only to resolve b, not up scope tree */
    public Symbol resolveMember(String name) { return fields.get(name); }
    public Map<String, Symbol> getMembers() { return fields; }
    public String toString() {
        return "struct "+name+":{"+fields.keySet().toString()+"}";
    }
}