1.1 --- a/src/share/classes/com/sun/tools/javac/util/List.java Tue Feb 05 21:55:41 2013 -0800
1.2 +++ b/src/share/classes/com/sun/tools/javac/util/List.java Wed Feb 06 14:03:39 2013 +0000
1.3 @@ -96,6 +96,26 @@
1.4 return res.reverse();
1.5 }
1.6
1.7 + public List<A> intersect(List<A> that) {
1.8 + ListBuffer<A> buf = ListBuffer.lb();
1.9 + for (A el : this) {
1.10 + if (that.contains(el)) {
1.11 + buf.append(el);
1.12 + }
1.13 + }
1.14 + return buf.toList();
1.15 + }
1.16 +
1.17 + public List<A> diff(List<A> that) {
1.18 + ListBuffer<A> buf = ListBuffer.lb();
1.19 + for (A el : this) {
1.20 + if (!that.contains(el)) {
1.21 + buf.append(el);
1.22 + }
1.23 + }
1.24 + return buf.toList();
1.25 + }
1.26 +
1.27 /** Construct a list consisting of given element.
1.28 */
1.29 public static <A> List<A> of(A x1) {
