Mercurial > hg > graal-compiler
diff graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/literal/NilNode.java @ 13529:856c2c294f84
Merge.
author | Christian Humer <christian.humer@gmail.com> |
---|---|
date | Tue, 07 Jan 2014 18:53:04 +0100 |
parents | 0fbee3eb71f0 |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/literal/NilNode.java Tue Jan 07 18:53:04 2014 +0100 @@ -0,0 +1,42 @@ +/* + * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This + * code is released under a tri EPL/GPL/LGPL license. You can use it, + * redistribute it and/or modify it under the terms of the: + * + * Eclipse Public License version 1.0 + * GNU General Public License version 2 + * GNU Lesser General Public License version 2.1 + */ +package com.oracle.truffle.ruby.nodes.literal; + +import com.oracle.truffle.api.*; +import com.oracle.truffle.api.frame.*; +import com.oracle.truffle.api.nodes.*; +import com.oracle.truffle.ruby.nodes.*; +import com.oracle.truffle.ruby.runtime.*; + +/** + * A node that does nothing and evaluates to Nil. A no-op. + */ +@NodeInfo(shortName = "nil") +public final class NilNode extends RubyNode { + + public NilNode(RubyContext context, SourceSection sourceSection) { + super(context, sourceSection); + } + + @Override + public NilPlaceholder executeNilPlaceholder(VirtualFrame frame) { + return NilPlaceholder.INSTANCE; + } + + @Override + public Object execute(VirtualFrame frame) { + return executeNilPlaceholder(frame); + } + + @Override + public void executeVoid(VirtualFrame frame) { + } + +}