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/* valacodenode.vala
*
* Copyright (C) 2006-2007 Jürg Billeter
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Author:
* Jürg Billeter <j@bitron.ch>
*/
using GLib;
/**
* Represents a part of the parsed source code.
*
* Code nodes get created by the parser and are used throughout the whole
* compilation process.
*/
public abstract class Vala.CodeNode {
/**
* Parent of this code node.
*/
public weak CodeNode parent_node { get; set; }
/**
* References the location in the source file where this code node has
* been written.
*/
public SourceReference source_reference { get; set; }
/**
* Contains all attributes that have been specified for this code node.
*/
public List<Attribute> attributes;
/**
* Generated CCodeNode that corresponds to this code node.
*/
public CCodeNode ccodenode {
get {
return _ccodenode;
}
set {
if (source_reference != null) {
value.line = new CCodeLineDirective (
source_reference.file.filename,
source_reference.first_line);
}
_ccodenode = value;
}
}
/**
* Specifies whether a fatal error has been detected in this code node.
*/
public bool error { get; set; }
/**
* Specifies that this node or a child node may throw an exception.
*/
public bool tree_can_fail { get; set; }
/**
* Visits this code node with the specified CodeVisitor.
*
* @param visitor the visitor to be called while traversing
*/
public virtual void accept (CodeVisitor! visitor) {
}
/**
* Visits all children of this code node with the specified CodeVisitor.
*
* @param visitor the visitor to be called while traversing
*/
public virtual void accept_children (CodeVisitor! visitor) {
}
public virtual void replace (CodeNode! old_node, CodeNode! new_node) {
}
/**
* Returns the specified attribute.
*
* @param name attribute name
* @return attribute
*/
public Attribute get_attribute (string! name) {
// FIXME: use hash table
foreach (Attribute a in attributes) {
if (a.name == name) {
return a;
}
}
return null;
}
private CCodeNode _ccodenode;
/**
* Returns a string that represents this code node.
*
* @return a string representation
*/
public virtual string! to_string () {
if (source_reference != null) {
return source_reference.to_string ();
}
return "(unknown)";
}
}
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