author | chegar |
Thu, 17 Oct 2019 20:54:25 +0100 | |
branch | datagramsocketimpl-branch |
changeset 58679 | 9c3209ff7550 |
parent 58678 | 9cf78a70fa4f |
parent 55561 | 4c0a7916d3cd |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/* |
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* @test |
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4c0a7916d3cd
8226522: No compilation error reported when yield is used in incorrect context
jlahoda
parents:
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changeset
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* @bug 8223305 8226522 |
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* @summary Ensure proper errors are returned for yields. |
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* @compile/fail/ref=WrongYieldTest.out --enable-preview -source ${jdk.version} -XDrawDiagnostics -XDshould-stop.at=ATTR WrongYieldTest.java |
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*/ |
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package t; |
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//ERROR - type called yield: |
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import t.WrongYieldTest.yield; |
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public class WrongYieldTest { |
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// ERROR - class called yield |
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class yield { } |
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// OK to have fields called yield |
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String[] yield = null; |
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// ERROR - field of type yield |
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yield y; |
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// OK to have methods called yield |
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// Nullary yield method |
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String[] yield() { |
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return null; |
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} |
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// Unary yield method |
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String[] yield(int i) { |
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return null; |
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} |
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// Binary yield method |
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String[] yield(int i, int j) { |
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return null; |
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} |
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// OK to declare a local called yield |
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void LocalDeclaration1() { |
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int yield; |
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} |
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// OK to declare and initialise a local called yield |
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void LocalDeclaration2() { |
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int yield = 42; |
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} |
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// ERROR can't refer to a local called yield in the initialiser |
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void LocalDeclaration3() { |
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int yield = yield + 1; |
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} |
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// OK yield gets interpreted as an identifier in a local declaration |
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void LocalDeclaration4(int i) { |
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int local = switch (i) { |
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default -> { |
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int yield = yield + 1; |
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yield 42; |
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} |
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}; |
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} |
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// OK - yield a local called yield |
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void LocalDeclaration5(int i) { |
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int yield = 42; |
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int temp = switch (i) { |
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default -> { |
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yield yield; |
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} |
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}; |
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} |
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void YieldTypedLocals(int i) { |
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// ERROR - Parsed as yield statement, and y1 is unknown |
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yield y1 = null; |
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// ..whereas.. |
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// ERROR - parsed as yield statement, which has no switch target |
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Object y1; |
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yield y1 = null; |
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// ERROR - Parsed as yield statement, and y2 is unknown |
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yield y2 = new yield(); |
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// OK - Parsed as yield statement that assigns local y |
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Object y; |
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Object o = switch (i) { |
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default : |
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yield y = null; |
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}; |
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// ERROR - Parsed as yield statement that assigns local y, |
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//but the initializer refers to restricted identifier: |
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Object y2; |
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Object o2 = switch (i) { |
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default : |
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yield y2 = new yield(); |
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}; |
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// ERROR - can not create an yield-valued local of type Object |
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Object y3 = new yield(); |
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// ERROR - can not create a final yield-valued local of type yield |
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final yield y4 = new yield(); |
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// ERROR - can create a non-final local of type yield using qualified typename |
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WrongYieldTest.yield y5 = new yield(); |
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} |
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void MethodInvocation(int i) { |
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// OK - can access a field called yield |
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String[] x = this.yield; |
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// ERROR - calling nullary yield method using simple name parsed as yield statement |
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yield(); |
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// OK - can call nullary yield method using qualified name |
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this.yield(); |
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// ERROR - Calling unary yield method using simple name is parsed as yield statement |
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yield(2); |
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// OK - calling unary yield method using qualified name |
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this.yield(2); |
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// ERROR - Calling binary yield method using simple name is parsed as yield statement |
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yield(2, 2); //error |
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// OK - calling binary yield method using qualified name |
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this.yield(2, 2); |
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// ERROR - nullary yield method as receiver is parsed as yield statement |
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yield().toString(); |
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// OK - nullary yield method as receiver using qualified name |
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this.yield().toString(); |
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// ERROR - unary yield method as receiver is parsed as yield statement |
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yield(2).toString(); |
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// OK - unary yield method as receiver using qualified name |
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this.yield(2).toString(); |
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// ERROR - binary yield method as receiver is parsed as yield statement |
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yield(2, 2).toString(); |
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// OK - binary yield method as receiver using qualified name |
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this.yield(2, 2).toString(); |
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// OK - yield method call is in an expression position |
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String str = yield(2).toString(); |
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//OK - yield is a variable |
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yield.toString(); |
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// OK - parsed as method call (with qualified local yield as receiver) |
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this.yield.toString(); |
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yield[0].toString(); //error |
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// OK - parsed as yield statement in switch expression |
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int j = switch (i) { |
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default: |
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yield(2); |
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}; |
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// ERROR - second yield is an unreachable statement. |
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x = switch (i) { |
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default: { |
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yield x = null; |
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yield null; |
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} |
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}; |
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} |
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private void yieldLocalVar1(int i) { |
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int yield = 0; |
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//OK - yield is a variable: |
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yield++; |
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yield--; |
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//ERROR - yield is a statement, but no enclosing switch expr: |
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yield ++i; |
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yield --i; |
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//OK - yield is a variable: |
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yield = 3; |
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//OK - yield is a variable: |
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for (int j = 0; j < 3; j++) |
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yield += 1; |
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//OK - yield is a variable and not at the beginning of the statement: |
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yieldLocalVar1(yield); |
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//ERROR - unqualified yield method invocation: |
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yieldLocalVar1(yield().length); |
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yieldLocalVar1(yield.class.getModifiers()); |
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} |
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private void yieldLocalVar2(int i) { |
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int[] yield = new int[1]; |
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//OK - yield is a variable: |
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yield[0] = 5; |
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} |
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55561
4c0a7916d3cd
8226522: No compilation error reported when yield is used in incorrect context
jlahoda
parents:
55306
diff
changeset
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8226522: No compilation error reported when yield is used in incorrect context
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private void lambda() { |
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SAM s = (yield y) -> {}; |
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} |
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interface SAM { |
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public void m(Object o); |
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} |
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} |