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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

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 *

 * 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,

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 *

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package java.dyn;

/**

 * {@code InvokeDynamic} is a class with neither methods nor instances,

 * which serves only as a syntactic marker in Java source code for

 * an {@code invokedynamic} instruction.

 * (See <a href="package-summary.html#jvm_mods">the package information</a> for specifics on this instruction.)

 * <p>

 * The {@code invokedynamic} instruction is incomplete without a target method.

 * The target method is a property of the reified {@linkplain CallSite call site object}

 * which is linked to each active {@code invokedynamic} instruction.

 * The call site object is initially produced by a

 * {@linkplain BootstrapMethod bootstrap method}

 * associated with the class whose bytecodes include the dynamic call site.

 * <p>

 * The type {@code InvokeDynamic} has no particular meaning as a

 * class or interface supertype, or an object type; it can never be instantiated.

 * Logically, it denotes a source of all dynamically typed methods.

 * It may be viewed as a pure syntactic marker of static calls.

 * It may be imported for ease of use.

 * <p>

 * Here are some examples:

<blockquote><pre><!-- see indy-demo/src/JavaDocExamples.java -->

@BootstrapMethod(value=Here.class, name="bootstrapDynamic")

static void example() throws Throwable {

    Object x; String s; int i;

    x = InvokeDynamic.greet("world"); // greet(Ljava/lang/String;)Ljava/lang/Object;

    s = (String) InvokeDynamic.hail(x); // hail(Ljava/lang/Object;)Ljava/lang/String;

    InvokeDynamic.cogito(); // cogito()V

    i = (int) InvokeDynamic.#"op:+"(2, 3); // "op:+"(II)I

}

static MethodHandle bootstrapDynamic(Class caller, String name, MethodType type) { ... }

</pre></blockquote>

 * Each of the above calls generates a single invokedynamic instruction

 * with the name-and-type descriptors indicated in the comments.

 * <p>

 * The argument types are taken directly from the actual arguments,

 * while the return type corresponds to the target of the assignment.

 * (Currently, the return type must be given as a false type parameter.

 * This type parameter is an irregular use of the generic type syntax,

 * and is likely to change in favor of a convention based on target typing.)

 * <p>

 * The final example uses a special syntax for uttering non-Java names.

 * Any name legal to the JVM may be given between the double quotes.

 * <p>

 * None of these calls is complete without a bootstrap method,

 * which must be declared for the enclosing class or method.

 * @author John Rose, JSR 292 EG

 */

@MethodHandle.PolymorphicSignature

public final class InvokeDynamic {

    private InvokeDynamic() { throw new InternalError(); }  // do not instantiate

    // no statically defined static methods

}