--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/luan/interp/ExpList.java	Wed Nov 14 08:53:25 2012 +0000
@@ -0,0 +1,71 @@
+package luan.interp;
+
+import java.util.List;
+import java.util.ArrayList;
+import luan.LuaException;
+
+
+final class ExpList extends Values {
+
+	private interface Adder {
+		public void addTo(List<Object> list) throws LuaException;
+	}
+
+	private static class ExprAdder implements Adder {
+		private final Expr expr;
+
+		ExprAdder(Expr expr) {
+			this.expr = expr;
+		}
+
+		public void addTo(List<Object> list) throws LuaException {
+			list.add( expr.eval() );
+		}
+
+	}
+
+	private static class ValuesAdder implements Adder {
+		private final Values values;
+
+		ValuesAdder(Values values) {
+			this.values = values;
+		}
+
+		public void addTo(List<Object> list) throws LuaException {
+			for( Object val : values.eval() ) {
+				list.add( val );
+			}
+		}
+
+	}
+
+	static class Builder {
+		private final List<Adder> adders = new ArrayList<Adder>();
+
+		void add(Expr expr) {
+			adders.add( new ExprAdder(expr) );
+		}
+
+		void add(Values values) {
+			adders.add( new ValuesAdder(values) );
+		}
+
+		ExpList build() {
+			return new ExpList( adders.toArray(new Adder[0]) );
+		}
+	}
+
+	private final Adder[] adders;
+
+	private ExpList(Adder[] adders) {
+		this.adders = adders;
+	}
+
+	List eval() throws LuaException {
+		List<Object> list = new ArrayList<Object>();
+		for( Adder adder : adders ) {
+			adder.addTo(list);
+		}
+		return list;
+	}
+}