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6675483: Javac rejects multiple type-variable bound declarations starting with an enum type

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Intersection types bounded by an enum are erroeously considered harmful by javac

Reviewed-by: jjg
This commit is contained in:
Maurizio Cimadamore 2008-07-25 12:22:09 +01:00
parent 5f46dc3001
commit fbde930522
2 changed files with 41 additions and 1 deletions
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2
langtools/src/share/classes/com/sun/tools/javac/comp/Attr.java
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@ -2664,7 +2664,7 @@ public class Attr extends JCTree.Visitor {
// Enums may not be extended by source-level classes // Enums may not be extended by source-level classes
if (st.tsym != null && if (st.tsym != null &&
((st.tsym.flags_field & Flags.ENUM) != 0) && ((st.tsym.flags_field & Flags.ENUM) != 0) &&
((c.flags_field & Flags.ENUM) == 0) && ((c.flags_field & (Flags.ENUM | Flags.COMPOUND)) == 0) &&
!target.compilerBootstrap(c)) { !target.compilerBootstrap(c)) {
log.error(env.tree.pos(), "enum.types.not.extensible"); log.error(env.tree.pos(), "enum.types.not.extensible");
} }

40
langtools/test/tools/javac/enum/T6675483.java Normal file
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@ -0,0 +1,40 @@
/*
* Copyright 2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
/*
* @test
* @bug 6675483
*
* @summary Javac rejects multiple type-variable bound declarations starting with an enum type
* @author Maurizio Cimadamore
*
* @compile T6675483.java
*/
public class T6675483 {
enum E implements Comparable<E> {}
interface C<T extends E & Comparable<E>> {
<S extends E & Comparable<E>> void m();
}
}