Mercurial > hg > graal-jvmci-8
diff graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/methods/arguments/ReadBlockArgumentNode.java @ 13514:0fbee3eb71f0
Ruby: import project.
author | Chris Seaton <chris.seaton@oracle.com> |
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date | Mon, 06 Jan 2014 17:12:09 +0000 |
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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/methods/arguments/ReadBlockArgumentNode.java Mon Jan 06 17:12:09 2014 +0000 @@ -0,0 +1,48 @@ +/* + * 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.methods.arguments; + +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.*; +import com.oracle.truffle.ruby.runtime.core.*; + +/** + * Read the block as a {@code Proc}. + */ +@NodeInfo(shortName = "read-block-argument") +public class ReadBlockArgumentNode extends RubyNode { + + private final boolean undefinedIfNotPresent; + + public ReadBlockArgumentNode(RubyContext context, SourceSection sourceSection, boolean undefinedIfNotPresent) { + super(context, sourceSection); + this.undefinedIfNotPresent = undefinedIfNotPresent; + } + + @Override + public Object execute(VirtualFrame frame) { + final RubyArguments arguments = frame.getArguments(RubyArguments.class); + final RubyProc block = arguments.getBlock(); + + if (block == null) { + if (undefinedIfNotPresent) { + return UndefinedPlaceholder.INSTANCE; + } else { + return NilPlaceholder.INSTANCE; + } + } else { + return block; + } + } + +}