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=TestAssignment.out -Xlint:-incubating -XDrawDiagnostics TestAssignment.java 28 */ 29 30 import jdk.incubator.code.Quoted; 31 32 class TestAssignment { 33 void test(boolean cond) { 34 Quoted f_NoRet = () -> {}; 35 Quoted fiS_NoRet = (int i) -> ""; // ok (int->String) 36 Quoted fiS_Ret = (int i) -> { return ""; }; // ok (int->String) 37 Quoted fiV_NoRet = (int i) -> { }; // ok (int->V) 38 Quoted fiV_Ret = (int i) -> { return; }; // ok (int->V) 39 Quoted fiV_RetRet = (int i) -> { if (cond) return; else return; }; // ok (int->V) 40 Quoted fiS_RetRet = (int i) -> { if (cond) return "1"; else return "2"; }; // ok (int->String) 41 } 42 43 void testImplicit(boolean cond) { 44 Quoted fiS_NoRet = (i) -> ""; // error - no parameter types 45 Quoted fiS_Ret = (i) -> { return ""; }; // error - no parameter types 46 Quoted fiV_NoRet = (i) -> { }; // error - no parameter types 47 Quoted fiV_Ret = (i) -> { return; }; // error - no parameter types 48 Quoted fiV_RetRet = (i) -> { if (cond) return; else return; }; // error - no parameter types 49 Quoted fiS_RetRet = (i) -> { if (cond) return "1"; else return "2"; }; // error - no parameter types 50 } 51 52 void testImplicitVar(boolean cond) { 53 Quoted fiS_NoRet = (var i) -> ""; // error - no parameter types 54 Quoted fiS_Ret = (var i) -> { return ""; }; // error - no parameter types 55 Quoted fiV_NoRet = (var i) -> { }; // error - no parameter types 56 Quoted fiV_Ret = (var i) -> { return; }; // error - no parameter types 57 Quoted fiV_RetRet = (var i) -> { if (cond) return; else return; }; // error - no parameter types 58 Quoted fiS_RetRet = (var i) -> { if (cond) return "1"; else return "2"; }; // error - no parameter types 59 } 60 61 void testBadInferredReturn(boolean cond) { 62 Quoted fi_RetVRetS = (int i) -> { if (cond) return; else return ""; }; // error - only one branch returns 63 Quoted fi_RetS = (int i) -> { if (cond) { return "2"; } }; // error - one return, but body completes normally 64 } 65 66 void testBadNullReturn(boolean cond) { 67 Quoted fi_RetNullS = (int i) -> { return null; }; // error - null return - statement 68 Quoted fi_RetNullE = (int i) -> null; // error - null return - expression 69 Quoted fi_RetNullCondS = (int i) -> { return cond ? null : null; }; // error - null conditional return - statement 70 Quoted fi_RetNullCondE = (int i) -> cond ? null : null; // error - null conditional return - expression 71 } 72 73 void testBadLambdaReturn(boolean cond) { 74 Quoted fi_RetLambdaS = (int i) -> { return () -> {}; }; // error - lambda return - statement 75 Quoted fi_RetLambdaE = (int i) -> () -> {};; // error - lambda return - expression 76 Quoted fi_RetLambdaCondS = (int i) -> { return cond ? () -> {} : () -> {}; }; // error - lambda conditional return - statement 77 Quoted fi_RetLambdaCondE = (int i) -> cond ? () -> {} : () -> {}; // error - lambda conditional return - expression 78 } 79 80 void testBadMrefReturn(boolean cond) { 81 Quoted fi_RetMrefS = (int i) -> { return this::mr; }; // error - mref return - statement 82 Quoted fi_RetMrefE = (int i) -> this::mr;; // error - mref return - expression 83 Quoted fi_RetMrefCondS = (int i) -> { return cond ? this::mr : this::mr; }; // error - mref conditional return - statement 84 Quoted fi_RetMrefCondE = (int i) -> cond ? this::mr : this::mr; // error - mref conditional return - expression 85 } 86 87 void mr() { } 88 }