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view graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/objects/ReadClassVariableNode.java @ 13853:f11d3d5248b5
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author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Fri, 31 Jan 2014 16:36:02 -0800 |
parents | 0fbee3eb71f0 |
children |
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/* * 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"); } } }