content: /*
   * Copyright (c) 2010, 2013, Oracle and/or its affiliates. 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.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
   *
   * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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   * questions.
   */
  
  package java.lang;
  
  import java.lang.annotation.*;
  
  /**
   * A programmer assertion that the body of the annotated method or
   * constructor does not perform potentially unsafe operations on its
   * varargs parameter.  Applying this annotation to a method or
   * constructor suppresses unchecked warnings about a
   * <i>non-reifiable</i> variable arity (vararg) type and suppresses
   * unchecked warnings about parameterized array creation at call
   * sites.
   *
   * <p> In addition to the usage restrictions imposed by its {@link
   * Target @Target} meta-annotation, compilers are required to implement
   * additional usage restrictions on this annotation type; it is a
   * compile-time error if a method or constructor declaration is
   * annotated with a {@code @SafeVarargs} annotation, and either:
   * <ul>
   * <li>  the declaration is a fixed arity method or constructor
   *
   * <li> the declaration is a variable arity method that is neither
   * {@code static} nor {@code final}.
   *
   * </ul>
   *
   * <p> Compilers are encouraged to issue warnings when this annotation
   * type is applied to a method or constructor declaration where:
   *
   * <ul>
   *
   * <li> The variable arity parameter has a reifiable element type,
   * which includes primitive types, {@code Object}, and {@code String}.
   * (The unchecked warnings this annotation type suppresses already do
   * not occur for a reifiable element type.)
   *
   * <li> The body of the method or constructor declaration performs
   * potentially unsafe operations, such as an assignment to an element
   * of the variable arity parameter's array that generates an unchecked
   * warning.  Some unsafe operations do not trigger an unchecked
   * warning.  For example, the aliasing in
   *
   * <blockquote><pre>
   * &#64;SafeVarargs // Not actually safe!
   * static void m(List&lt;String&gt;... stringLists) {
   *   Object[] array = stringLists;
   *   List&lt;Integer&gt; tmpList = Arrays.asList(42);
   *   array[0] = tmpList; // Semantically invalid, but compiles without warnings
   *   String s = stringLists[0].get(0); // Oh no, ClassCastException at runtime!
   * }
   * </pre></blockquote>
   *
   * leads to a {@code ClassCastException} at runtime.
   *
   * <p>Future versions of the platform may mandate compiler errors for
   * such unsafe operations.
   *
   * </ul>
   *
   * @since 1.7
   * @jls 4.7 Reifiable Types
   * @jls 8.4.1 Formal Parameters
   * @jls 9.6.3.7 @SafeVarargs
   */
  @Documented
  @Retention(RetentionPolicy.RUNTIME)
  @Target({ElementType.CONSTRUCTOR, ElementType.METHOD})
  public @interface SafeVarargs {}
  