Mercurial > hg > graal-compiler
diff graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/objects/ReadClassVariableNode.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/objects/ReadClassVariableNode.java Mon Jan 06 17:12:09 2014 +0000 @@ -0,0 +1,78 @@ +/* + * 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.objects; + +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.*; + +@NodeInfo(shortName = "read-class-variable") +public class ReadClassVariableNode extends RubyNode { + + protected final String name; + @Child protected RubyNode module; + + public ReadClassVariableNode(RubyContext context, SourceSection sourceSection, String name, RubyNode module) { + super(context, sourceSection); + this.name = name; + this.module = adoptChild(module); + } + + @Override + public Object execute(VirtualFrame frame) { + final RubyObject object = (RubyObject) module.execute(frame); + + RubyModule moduleObject; + + // TODO(CS): this cannot be right + + if (object instanceof RubyModule) { + moduleObject = (RubyModule) object; + } else { + moduleObject = object.getRubyClass(); + } + + final Object value = moduleObject.lookupClassVariable(name); + + if (value == null) { + // TODO(CS): is this right? + return NilPlaceholder.INSTANCE; + } + + return value; + } + + @Override + public Object isDefined(VirtualFrame frame) { + final RubyContext context = getContext(); + + final RubyObject object = (RubyObject) module.execute(frame); + + RubyModule moduleObject; + + if (object instanceof RubyModule) { + moduleObject = (RubyModule) object; + } else { + moduleObject = object.getRubyClass(); + } + + final Object value = moduleObject.lookupClassVariable(name); + + if (value == null) { + return NilPlaceholder.INSTANCE; + } else { + return context.makeString("class variable"); + } + } + +}