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annotate graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/call/ProcOrNullNode.java @ 13514:0fbee3eb71f0

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Ruby: import project.
author Chris Seaton <chris.seaton@oracle.com>
date Mon, 06 Jan 2014 17:12:09 +0000
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13514
0fbee3eb71f0 Ruby: import project.
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1 /*
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2 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
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3 * code is released under a tri EPL/GPL/LGPL license. You can use it,
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4 * redistribute it and/or modify it under the terms of the:
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5 *
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6 * Eclipse Public License version 1.0
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7 * GNU General Public License version 2
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8 * GNU Lesser General Public License version 2.1
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9 */
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10 package com.oracle.truffle.ruby.nodes.call;
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11
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12 import com.oracle.truffle.api.*;
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13 import com.oracle.truffle.api.dsl.*;
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14 import com.oracle.truffle.api.frame.*;
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15 import com.oracle.truffle.api.nodes.*;
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16 import com.oracle.truffle.ruby.nodes.*;
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17 import com.oracle.truffle.ruby.runtime.*;
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18 import com.oracle.truffle.ruby.runtime.core.*;
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19
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20 /**
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21 * Wraps some node that will produce either a {@link RubyProc} or a {@link NilPlaceholder} and
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22 * returns {@code null} in case of the latter. Used in parts of the dispatch chain.
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23 */
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24 @NodeInfo(shortName = "proc-or-null")
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25 @NodeChild(value = "child", type = RubyNode.class)
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26 public abstract class ProcOrNullNode extends RubyNode {
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27
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28 public ProcOrNullNode(RubyContext context, SourceSection sourceSection) {
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29 super(context, sourceSection);
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30 }
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31
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32 public ProcOrNullNode(ProcOrNullNode prev) {
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33 super(prev);
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34 }
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35
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36 @Specialization
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37 public Object doNil(@SuppressWarnings("unused") NilPlaceholder nil) {
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38 return null;
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39 }
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40
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41 @Specialization
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42 public Object doProc(RubyProc proc) {
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43 return proc;
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44 }
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45
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46 @Override
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47 public RubyProc executeRubyProc(VirtualFrame frame) {
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48 final Object proc = execute(frame);
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49
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50 // The standard asRubyProc test doesn't allow for null
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51 assert proc == null || RubyTypesGen.RUBYTYPES.isRubyProc(proc);
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52
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53 return (RubyProc) proc;
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54 }
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55
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56 }