FunctionCall.java revision 1483:7cb19fa78763 
1/*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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24 */
25
26package jdk.nashorn.internal.ir;
27
28import jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor;
29
30/**
31 * Interface used by AccessNodes, IndexNodes and IdentNodes to signal that when evaluated, their value will be treated
32 * as a function and immediately invoked, e.g. {@code foo()}, {@code foo.bar()} or {@code foo[bar]()}. Used to customize
33 * the priority of composite dynamic operations when emitting {@code INVOKEDYNAMIC} instructions that implement them,
34 * namely prioritize {@code getMethod} over {@code getElem} or {@code getProp}. An access or ident node with isFunction
35 * set to true will be emitted as {@link NashornCallSiteDescriptor#GET_METHOD_PROPERTY} while one with it set to false will be emitted
36 * as {@link NashornCallSiteDescriptor#GET_PROPERTY}. Similarly, an index node with isFunction set to true will be emitted as
37 * {@link NashornCallSiteDescriptor#GET_METHOD_ELEMENT} while the one set to false will be emitted as {@link NashornCallSiteDescriptor#GET_ELEMENT}.
38 */
39public interface FunctionCall {
40    /**
41     * Returns true if the value of this expression will be treated as a function and immediately invoked.
42     * @return true if the value of this expression will be treated as a function and immediately invoked.
43     */
44    public boolean isFunction();
45}
46