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/* valafield.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 2.1 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;
using Gee;
/**
* Represents a type or namespace field.
*/
public class Vala.Field : Member, Invokable, Lockable {
/**
* The data type of this field.
*/
public DataType! type_reference {
get { return _data_type; }
set {
_data_type = value;
_data_type.parent_node = this;
}
}
/**
* Specifies the expression to be used to initialize this field.
*/
public Expression initializer { get; set; }
/**
* Specifies whether this field may only be accessed with an instance of
* the contained type.
*/
public bool instance {
get { return _instance; }
set { _instance = value; }
}
/**
* Specifies whether the field is volatile. Volatile fields are
* necessary to allow multi-threaded access.
*/
public bool is_volatile { get; set; }
/**
* Specifies whether an array length field should implicitly be created
* if the field type is an array.
*/
public bool no_array_length { get; set; }
private string cname;
private bool _instance = true;
private bool lock_used = false;
private DataType _data_type;
/**
* Creates a new field.
*
* @param name field name
* @param type field type
* @param init initializer expression
* @param source reference to source code
* @return newly created field
*/
public Field (construct string! name, construct DataType! type_reference, construct Expression initializer, construct SourceReference source_reference = null) {
}
public override void accept (CodeVisitor! visitor) {
visitor.visit_member (this);
visitor.visit_field (this);
}
public override void accept_children (CodeVisitor! visitor) {
type_reference.accept (visitor);
if (initializer != null) {
initializer.accept (visitor);
}
}
/**
* Returns the name of this field as it is used in C code.
*
* @return the name to be used in C code
*/
public string! get_cname () {
if (cname == null) {
cname = get_default_cname ();
}
return cname;
}
private void set_cname (string! cname) {
this.cname = cname;
}
/**
* Returns the default name of this field as it is used in C code.
*
* @return the name to be used in C code by default
*/
public string! get_default_cname () {
if (!instance) {
return parent_symbol.get_lower_case_cprefix () + name;
} else {
return name;
}
}
private void process_ccode_attribute (Attribute! a) {
if (a.has_argument ("cname")) {
set_cname (a.get_string ("cname"));
}
if (a.has_argument ("cheader_filename")) {
var val = a.get_string ("cheader_filename");
foreach (string filename in val.split (",")) {
add_cheader_filename (filename);
}
}
}
/**
* Process all associated attributes.
*/
public void process_attributes () {
foreach (Attribute a in attributes) {
if (a.name == "CCode") {
process_ccode_attribute (a);
} else if (a.name == "NoArrayLength") {
no_array_length = true;
}
}
}
public Collection<FormalParameter> get_parameters () {
if (!is_invokable ()) {
return null;
}
var cb = (Callback) type_reference.data_type;
return cb.get_parameters ();
}
public DataType get_return_type () {
if (!is_invokable ()) {
return null;
}
var cb = (Callback) type_reference.data_type;
return cb.return_type;
}
public bool is_invokable () {
return (type_reference.data_type is Callback);
}
public bool get_lock_used () {
return lock_used;
}
public void set_lock_used (bool used) {
lock_used = used;
}
public override void replace_type (DataType! old_type, DataType! new_type) {
if (type_reference == old_type) {
type_reference = new_type;
}
}
}
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