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comparison graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/yield/YieldNode.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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13513:64a23ce736a0 13514:0fbee3eb71f0
1 /*
2 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
3 * code is released under a tri EPL/GPL/LGPL license. You can use it,
4 * redistribute it and/or modify it under the terms of the:
5 *
6 * Eclipse Public License version 1.0
7 * GNU General Public License version 2
8 * GNU Lesser General Public License version 2.1
9 */
10 package com.oracle.truffle.ruby.nodes.yield;
11
12 import com.oracle.truffle.api.*;
13 import com.oracle.truffle.api.frame.*;
14 import com.oracle.truffle.api.nodes.*;
15 import com.oracle.truffle.ruby.nodes.*;
16 import com.oracle.truffle.ruby.runtime.*;
17 import com.oracle.truffle.ruby.runtime.core.*;
18
19 /**
20 * Yield to the current block.
21 */
22 @NodeInfo(shortName = "yield")
23 public class YieldNode extends RubyNode {
24
25 @Children protected final RubyNode[] arguments;
26 @Child protected YieldDispatchNode dispatch;
27
28 public YieldNode(RubyContext context, SourceSection sourceSection, RubyNode[] arguments) {
29 super(context, sourceSection);
30 this.arguments = adoptChildren(arguments);
31 dispatch = adoptChild(new UninitializedYieldDispatchNode(getContext(), getSourceSection()));
32 }
33
34 @ExplodeLoop
35 @Override
36 public final Object execute(VirtualFrame frame) {
37 final Object[] argumentsObjects = new Object[arguments.length];
38
39 for (int i = 0; i < arguments.length; i++) {
40 argumentsObjects[i] = arguments[i].execute(frame);
41 }
42
43 final RubyProc block = frame.getArguments(RubyArguments.class).getBlock();
44
45 if (block == null) {
46 CompilerDirectives.transferToInterpreter();
47 // TODO(CS): convert to the proper Ruby exception
48 throw new RuntimeException("No block to yield to");
49 }
50
51 return dispatch.dispatch(frame, block, argumentsObjects);
52 }
53
54 @Override
55 public Object isDefined(VirtualFrame frame) {
56 final RubyArguments args = frame.getArguments(RubyArguments.class);
57
58 if (args.getBlock() == null) {
59 return NilPlaceholder.INSTANCE;
60 } else {
61 return getContext().makeString("yield");
62 }
63 }
64
65 }