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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

 * 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).

 *

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 * 2 along with this work; if not, write to the Free Software Foundation,

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 *

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package java.dyn;

/**

 * Syntactic marker to request javac to emit an {@code invokedynamic} instruction.

 * An {@code invokedynamic} instruction is a 5-byte bytecoded instruction

 * which begins with an opcode byte of value 186 ({@code 0xBA}),

 * and is followed by a two-byte index of a {@code NameAndType} constant

 * pool entry, then by two zero bytes.  The constant pool reference gives

 * the method name and argument and return types of the call site; there

 * is no other information provided at the call site.

 * <p>

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

 * The target method is a property of the reified call site object

 * (of type {@link CallSite}) which is in a one-to-one association with each

 * corresponding {@code invokedynamic} instruction.  The call site object

 * is initially produced by a <em>bootstrap method</em> associated with

 * the call site, via the various overloadings of {@link Linkage#registerBootstrapMethod}.

 * <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 (an importable one) of static calls.

 * <p>

 * Here are some examples of usage:

 * <p><blockquote><pre>

 * Object x; String s; int i;

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

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

 * InvokeDynamic.<void>cogito(); // cogito()V

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

 * </pre></blockquote>

 * Each of the above calls generates a single invokedynamic instruction

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

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

 * while the return type is taken from the type parameter.

 * (This type parameter may be a primtive, and it defaults to {@code Object}.)

 * 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.

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

 * which must be registered by the static initializer of the enclosing class.

 * @author John Rose, JSR 292 EG

 */

public final class InvokeDynamic {

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

    // no statically defined static methods

}