/*
***** BEGIN LICENSE BLOCK *****
* Version: CPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Common Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/cpl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2001-2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
* Copyright (C) 2001-2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
* Copyright (C) 2002 Anders Bengtsson <ndrsbngtssn@yahoo.se>
* Copyright (C) 2004 Thomas E Enebo <enebo@acm.org>
* Copyright (C) 2004 Charles O Nutter <headius@headius.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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package org.jruby.ast;
import java.util.List;
import org.jruby.Ruby;
import org.jruby.ast.visitor.NodeVisitor;
import org.jruby.evaluator.ASTInterpreter;
import org.jruby.lexer.yacc.ISourcePosition;
import org.jruby.runtime.Block;
import org.jruby.runtime.RubyEvent;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.util.ByteList;
/**
* A new (logical) source code line.
* This is used to change the value of the ruby interpreter source and line values.
* There is one such node for each logical line. Logical line differs
* from physical line in that a ';' can be used to make several logical
* line out of a physical line and a physical line if it is in a comment
* or in a string does not necessarily correspond to a physical line.
* This is normally a wrapper around another more significant node.
* The parser generates such a node around each separate statement.
*/
public class NewlineNode extends Node {
private final Node nextNode;
public NewlineNode(ISourcePosition position, Node nextNode) {
super(position);
assert nextNode != null : "nextNode is not null";
this.nextNode = nextNode;
}
public NodeType getNodeType() {
return NodeType.NEWLINENODE;
}
/**
* RubyMethod used by visitors.
* accepts the visitor
* @param iVisitor the visitor to accept
**/
public Object accept(NodeVisitor iVisitor) {
return iVisitor.visitNewlineNode(this);
}
/**
* Gets the nextNode.
* @return Returns a Node
*/
public Node getNextNode() {
return nextNode;
}
public List<Node> childNodes() {
return createList(nextNode);
}
@Override
public IRubyObject interpret(Ruby runtime, ThreadContext context, IRubyObject self, Block aBlock) {
ISourcePosition position = getPosition();
// something in here is used to build up ruby stack trace...
context.setLine(position.getLine());
if (runtime.hasEventHooks()) {
ASTInterpreter.callTraceFunction(runtime, context, RubyEvent.LINE);
}
// TODO: do above but not below for additional newline nodes
return nextNode.interpret(runtime, context, self, aBlock);
}
public ByteList definition(Ruby runtime, ThreadContext context, IRubyObject self, Block aBlock) {
return nextNode.definition(runtime, context, self, aBlock);
}
}