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48 lines
2.3 KiB
Java
48 lines
2.3 KiB
Java
/*
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* Copyright (c) 2022, 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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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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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package java.lang.classfile;
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import jdk.internal.classfile.impl.LabelImpl;
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import jdk.internal.javac.PreviewFeature;
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/**
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* A marker for a position within the instructions of a method body. The
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* association between a label's identity and the position it represents is
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* managed by the entity managing the method body (a {@link CodeModel} or {@link
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* CodeBuilder}), not the label itself; this allows the same label to have a
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* meaning both in an existing method (as managed by a {@linkplain CodeModel})
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* and in the transformation of that method (as managed by a {@linkplain
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* CodeBuilder}), while corresponding to different positions in each. When
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* traversing the elements of a {@linkplain CodeModel}, {@linkplain Label}
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* markers will be delivered at the position to which they correspond. A label
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* can be bound to the current position within a {@linkplain CodeBuilder} via
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* {@link CodeBuilder#labelBinding(Label)} or {@link CodeBuilder#with(ClassFileElement)}.
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*
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* @since 22
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*/
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@PreviewFeature(feature = PreviewFeature.Feature.CLASSFILE_API)
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public sealed interface Label
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permits LabelImpl {
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}
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