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 * @modules jdk.incubator.code 27 * @compile/fail/ref=TestMethodCall.out -Xlint:-incubating -XDrawDiagnostics TestMethodCall.java 28 */ 29 30 import jdk.incubator.code.Quoted; 31 32 public class TestMethodCall { 33 void test(boolean cond) { 34 apply(() -> {}); 35 apply((int i) -> ""); // ok (int->String) 36 apply((int i) -> { return ""; }); // ok (int->String) 37 apply((int i) -> { }); // ok (int->V) 38 apply((int i) -> { return; }); // ok (int->V) 39 apply((int i) -> { if (cond) return; else return; }); // ok (int->V) 40 apply((int i) -> { if (cond) return "1"; else return "2"; }); // ok (int->String) 41 } 42 43 void testImplicit(boolean cond) { 44 apply((i) -> ""); // error - no parameter types 45 apply((i) -> { return ""; }); // error - no parameter types 46 apply((i) -> { }); // error - no parameter types 47 apply((i) -> { return; }); // error - no parameter types 48 apply((i) -> { if (cond) return; else return; }); // error - no parameter types 49 apply((i) -> { if (cond) return "1"; else return "2"; }); // error - no parameter types 50 } 51 52 void testImplicitVar(boolean cond) { 53 apply((var i) -> ""); // error - no parameter types 54 apply((var i) -> { return ""; }); // error - no parameter types 55 apply((var i) -> { }); // error - no parameter types 56 apply((var i) -> { return; }); // error - no parameter types 57 apply((var i) -> { if (cond) return; else return; }); // error - no parameter types 58 apply((var i) -> { if (cond) return "1"; else return "2"; }); // error - no parameter types 59 } 60 61 void testBadInferredReturn(boolean cond) { 62 apply((int i) -> { if (cond) return; else return ""; }); // error - only one branch returns 63 apply((int i) -> { if (cond) { return "2"; } }); // error - one return, but body completes normally 64 } 65 66 void testBadNullReturn(boolean cond) { 67 apply((int i) -> { return null; }); // error - null return - statement 68 apply((int i) -> null); // error - null return - expression 69 apply((int i) -> { return cond ? null : null; }); // error - null conditional return - statement 70 apply((int i) -> cond ? null : null); // error - null conditional return - expression 71 } 72 73 void testBadLambdaReturn(boolean cond) { 74 apply((int i) -> { return () -> {}; }); // error - lambda return - statement 75 apply((int i) -> () -> {});; // error - lambda return - expression 76 apply((int i) -> { return cond ? () -> {} : () -> {}; }); // error - lambda conditional return - statement 77 apply((int i) -> cond ? () -> {} : () -> {}); // error - lambda conditional return - expression 78 } 79 80 void testBadMrefReturn(boolean cond) { 81 apply((int i) -> { return this::mr; }); // error - mref return - statement 82 apply((int i) -> this::mr); // error - mref return - expression 83 apply((int i) -> { return cond ? this::mr : this::mr; }); // error - mref conditional return - statement 84 apply((int i) -> cond ? this::mr : this::mr); // error - mref conditional return - expression 85 } 86 87 void mr() { } 88 89 void apply(Quoted quoted) { } 90 }