1 /*
 2  * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 
24 /*
25  * @test /nodynamiccopyright/
26  * @compile/fail/ref=TestGenericMethodCall.out -XDrawDiagnostics TestGenericMethodCall.java
27  */
28 
29 import java.lang.reflect.code.Quoted;
30 
31 public class TestGenericMethodCall {
32     void test(boolean cond) {
33         apply(Quoted.class, () -> {});
34         apply(Quoted.class, (int i) -> ""); // ok (int->String)
35         apply(Quoted.class, (int i) -> { return ""; }); // ok (int->String)
36         apply(Quoted.class, (int i) -> { }); // ok (int->V)
37         apply(Quoted.class, (int i) -> { return; }); // ok (int->V)
38         apply(Quoted.class, (int i) -> { if (cond) return; else return; }); // ok (int->V)
39         apply(Quoted.class, (int i) -> { if (cond) return "1"; else return "2"; }); // ok (int->String)
40     }
41 
42     void testImplicit(boolean cond) {
43         apply(Quoted.class, (i) -> ""); // error - no parameter types
44         apply(Quoted.class, (i) -> { return ""; }); // error - no parameter types
45         apply(Quoted.class, (i) -> { }); // error - no parameter types
46         apply(Quoted.class, (i) -> { return; }); // error - no parameter types
47         apply(Quoted.class, (i) -> { if (cond) return; else return; }); // error - no parameter types
48         apply(Quoted.class, (i) -> { if (cond) return "1"; else return "2"; }); // error - no parameter types
49     }
50 
51     void testImplicitVar(boolean cond) {
52         apply(Quoted.class, (var i) -> ""); // error - no parameter types
53         apply(Quoted.class, (var i) -> { return ""; }); // error - no parameter types
54         apply(Quoted.class, (var i) -> { }); // error - no parameter types
55         apply(Quoted.class, (var i) -> { return; }); // error - no parameter types
56         apply(Quoted.class, (var i) -> { if (cond) return; else return; }); // error - no parameter types
57         apply(Quoted.class, (var i) -> { if (cond) return "1"; else return "2"; }); // error - no parameter types
58     }
59 
60     void testBadInferredReturn(boolean cond) {
61         apply(Quoted.class, (int i) -> { if (cond) return; else return ""; }); // error - only one branch returns
62         apply(Quoted.class, (int i) -> { if (cond) { return "2"; } }); // error - one return, but body completes normally
63     }
64 
65     <Z> void apply(Class<Z> clazz, Z quoted) { }
66 }