Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/constants/ReadConstantNode.java @ 13745:978587c91373
Merge
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Thu, 23 Jan 2014 16:35:57 -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.constants; import com.oracle.truffle.api.*; import com.oracle.truffle.api.frame.*; import com.oracle.truffle.ruby.nodes.*; import com.oracle.truffle.ruby.runtime.*; import com.oracle.truffle.ruby.runtime.control.*; public abstract class ReadConstantNode extends RubyNode { protected final String name; @Child protected RubyNode receiver; public ReadConstantNode(RubyContext context, SourceSection sourceSection, String name, RubyNode receiver) { super(context, sourceSection); this.name = name; this.receiver = adoptChild(receiver); } @Override public Object isDefined(VirtualFrame frame) { final RubyContext context = getContext(); if (name.equals("Encoding")) { /* * Work-around so I don't have to load the iconv library - runners/formatters/junit.rb. */ return context.makeString("constant"); } Object value; try { value = context.getCoreLibrary().box(receiver.execute(frame)).getLookupNode().lookupConstant(name); } catch (RaiseException e) { /* * If we are looking up a constant in a constant that is itself undefined, we return Nil * rather than raising the error. Eg.. defined?(Defined::Undefined1::Undefined2) */ if (e.getRubyException().getRubyClass() == context.getCoreLibrary().getNameErrorClass()) { return NilPlaceholder.INSTANCE; } throw e; } if (value == null) { return NilPlaceholder.INSTANCE; } else { return context.makeString("constant"); } } }