Mercurial > hg > graal-compiler
diff graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/call/ProcOrNullNode.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/call/ProcOrNullNode.java Mon Jan 06 17:12:09 2014 +0000 @@ -0,0 +1,56 @@ +/* + * 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.call; + +import com.oracle.truffle.api.*; +import com.oracle.truffle.api.dsl.*; +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.*; + +/** + * Wraps some node that will produce either a {@link RubyProc} or a {@link NilPlaceholder} and + * returns {@code null} in case of the latter. Used in parts of the dispatch chain. + */ +@NodeInfo(shortName = "proc-or-null") +@NodeChild(value = "child", type = RubyNode.class) +public abstract class ProcOrNullNode extends RubyNode { + + public ProcOrNullNode(RubyContext context, SourceSection sourceSection) { + super(context, sourceSection); + } + + public ProcOrNullNode(ProcOrNullNode prev) { + super(prev); + } + + @Specialization + public Object doNil(@SuppressWarnings("unused") NilPlaceholder nil) { + return null; + } + + @Specialization + public Object doProc(RubyProc proc) { + return proc; + } + + @Override + public RubyProc executeRubyProc(VirtualFrame frame) { + final Object proc = execute(frame); + + // The standard asRubyProc test doesn't allow for null + assert proc == null || RubyTypesGen.RUBYTYPES.isRubyProc(proc); + + return (RubyProc) proc; + } + +}