LambdaExpr18.java

/*
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * @test
 * @bug 8003280
 * @summary Add lambda tests
 *  check that synthetic casts from outer environment are not inserted twice
 * @run main LambdaExpr18
 */
public class LambdaExpr18 {

    static int assertionCount = 0;

    static void assertTrue(boolean cond) {
        assertionCount++;
        if (!cond)
            throw new AssertionError();
    }

    interface SAM<R> {
        R eval();
    }

    static void test(){
        SAM<Integer> sam1 = () -> {
            assertTrue(true);
            SAM<String> sam2 = () -> {
                assertTrue(true);
                return "";
            };
            sam2.eval();
            return 1;
        };
        sam1.eval();
    }

    public static void main(String[] args) {
        test();
        assertTrue(assertionCount == 2);
    }
}