test/tools/javac/generics/odersky/BadTest.java

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  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @ bug
  27  * @summary Negative regression test from odersky
  28  * @author odersky
  29  *
  30  * @compile/fail -source 1.5 BadTest.java
  31  */
  32 
  33 class BadTest {
  34     static class Main {
  35 
  36         static <B> List<B> nil() { return new List<B>(); }
  37         static <A> List<A> cons(A x, List<A> xs) { return xs.prepend(x); }
  38         static <A> Cell<A> makeCell(A x) { return new Cell<A>(x); }
  39         static <A> A id(A x) { return x; }
  40 
  41         public static void main(String[] args) {
  42             List<Cell<String>> as = nil().prepend(makeCell(null));
  43             List<Cell<String>> bs = cons(makeCell(null), nil());
  44             List<String> xs = id(nil());
  45             List<String> ys = cons("abc", id(nil()));
  46             List<String> zs = id(nil()).prepend("abc");
  47             List<Cell<String>> us = id(nil()).prepend(makeCell(null));
  48             List<Cell<String>> vs = cons(makeCell(null), id(nil()));
  49             System.out.println(nil() instanceof List<String>);
  50             nil();


  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @ bug
  27  * @summary Negative regression test from odersky
  28  * @author odersky
  29  *
  30  * @compile/fail  BadTest.java
  31  */
  32 
  33 class BadTest {
  34     static class Main {
  35 
  36         static <B> List<B> nil() { return new List<B>(); }
  37         static <A> List<A> cons(A x, List<A> xs) { return xs.prepend(x); }
  38         static <A> Cell<A> makeCell(A x) { return new Cell<A>(x); }
  39         static <A> A id(A x) { return x; }
  40 
  41         public static void main(String[] args) {
  42             List<Cell<String>> as = nil().prepend(makeCell(null));
  43             List<Cell<String>> bs = cons(makeCell(null), nil());
  44             List<String> xs = id(nil());
  45             List<String> ys = cons("abc", id(nil()));
  46             List<String> zs = id(nil()).prepend("abc");
  47             List<Cell<String>> us = id(nil()).prepend(makeCell(null));
  48             List<Cell<String>> vs = cons(makeCell(null), id(nil()));
  49             System.out.println(nil() instanceof List<String>);
  50             nil();