/*
***** 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 Benoit Cerrina <b.cerrina@wanadoo.fr>
* Copyright (C) 2001-2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
* Copyright (C) 2002 Anders Bengtsson <ndrsbngtssn@yahoo.se>
* Copyright (C) 2004 Thomas E Enebo <enebo@acm.org>
* Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
*
* 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
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the CPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the CPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby.ast;
import java.util.List;
import org.jruby.MetaClass;
import org.jruby.Ruby;
import org.jruby.RubyModule;
import org.jruby.ast.types.INameNode;
import org.jruby.ast.visitor.NodeVisitor;
import org.jruby.common.IRubyWarnings.ID;
import org.jruby.evaluator.Instruction;
import org.jruby.internal.runtime.methods.DefaultMethod;
import org.jruby.internal.runtime.methods.WrapperMethod;
import org.jruby.lexer.yacc.ISourcePosition;
import org.jruby.parser.StaticScope;
import org.jruby.runtime.Block;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.Visibility;
import org.jruby.runtime.builtin.IRubyObject;
/**
* method definition node.
*/
public class DefnNode extends MethodDefNode implements INameNode {
public DefnNode(ISourcePosition position, ArgumentNode nameNode, ArgsNode argsNode,
StaticScope scope, Node bodyNode) {
super(position, nameNode, argsNode, scope, bodyNode, NodeType.DEFNNODE);
}
public Instruction accept(NodeVisitor iVisitor) {
return iVisitor.visitDefnNode(this);
}
/**
* Get the name of this method
*/
@Override
public String getName() {
return nameNode.getName();
}
public List<Node> childNodes() {
return Node.createList(nameNode, argsNode, bodyNode);
}
@Override
public IRubyObject interpret(Ruby runtime, ThreadContext context, IRubyObject self, Block aBlock) {
RubyModule containingClass = context.getRubyClass();
if (containingClass == runtime.getDummy()) {
throw runtime.newTypeError("no class/module to add method");
}
String name = getName();
if (containingClass == runtime.getObject() && name == "initialize") {
runtime.getWarnings().warn(ID.REDEFINING_DANGEROUS, "redefining Object#initialize may cause infinite loop", "Object#initialize");
}
if (name == "__id__" || name == "__send__") {
runtime.getWarnings().warn(ID.REDEFINING_DANGEROUS, "redefining `" + name + "' may cause serious problem", name);
}
Visibility visibility = context.getCurrentVisibility();
if (name == "initialize" || name == "initialize_copy" || visibility == Visibility.MODULE_FUNCTION) {
visibility = Visibility.PRIVATE;
}
scope.determineModule();
// Make a nil node if no body. Notice this is not part of AST.
Node body = bodyNode == null ? new NilNode(getPosition()) : bodyNode;
DefaultMethod newMethod = new DefaultMethod(containingClass, scope,
body, (ArgsNode) argsNode,
visibility, getPosition());
containingClass.addMethod(name, newMethod);
if (context.getCurrentVisibility() == Visibility.MODULE_FUNCTION) {
containingClass.getSingletonClass().addMethod(name,
new WrapperMethod(containingClass.getSingletonClass(), newMethod, Visibility.PUBLIC));
containingClass.callMethod(context, "singleton_method_added", runtime.fastNewSymbol(name));
}
// 'class << state.self' and 'class << obj' uses defn as opposed to defs
if (containingClass.isSingleton()) {
((MetaClass) containingClass).getAttached().callMethod(context,
"singleton_method_added", runtime.fastNewSymbol(name));
} else {
containingClass.callMethod(context, "method_added", runtime.fastNewSymbol(name));
}
return runtime.getNil();
}
}