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/* valaattribute.vala
*
* Copyright (C) 2006-2008 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 an attribute specified in the source code.
*/
public class Vala.Attribute : CodeNode {
/**
* The name of the attribute type.
*/
public string name { get; set; }
/**
* Contains all specified attribute arguments.
*/
public Gee.List<NamedArgument> args = new ArrayList<NamedArgument> ();
/**
* Creates a new attribute.
*
* @param name attribute type name
* @param source_reference reference to source code
* @return newly created attribute
*/
public Attribute (construct string name, construct SourceReference source_reference) {
}
/**
* Adds an attribute argument.
*
* @param arg named argument
*/
public void add_argument (NamedArgument arg) {
args.add (arg);
}
/**
* Returns whether this attribute has the specified named argument.
*
* @param name argument name
* @return true if the argument has been found, false otherwise
*/
public bool has_argument (string name) {
// FIXME: use hash table
foreach (NamedArgument arg in args) {
if (arg.name == name) {
return true;
}
}
return false;
}
/**
* Returns the string value of the specified named argument.
*
* @param name argument name
* @return string value
*/
public string get_string (string name) {
// FIXME: use hash table
foreach (NamedArgument arg in args) {
if (arg.name == name) {
var lit = arg.argument as StringLiteral;
if (lit != null) {
return lit.eval ();
}
}
}
return null;
}
/**
* Returns the integer value of the specified named argument.
*
* @param name argument name
* @return integer value
*/
public int get_integer (string name) {
// FIXME: use hash table
foreach (NamedArgument arg in args) {
if (arg.name == name) {
var lit = arg.argument as IntegerLiteral;
if (lit != null) {
return lit.value.to_int ();
}
}
}
return 0;
}
/**
* Returns the double value of the specified named argument.
*
* @param name argument name
* @return double value
*/
public double get_double (string name) {
// FIXME: use hash table
foreach (NamedArgument arg in args) {
if (arg.name == name) {
if (arg.argument is RealLiteral) {
var lit = (RealLiteral) arg.argument;
return lit.value.to_double ();
} else if (arg.argument is IntegerLiteral) {
var lit = (IntegerLiteral) arg.argument;
return lit.value.to_int ();
} else if (arg.argument is UnaryExpression) {
var unary = (UnaryExpression) arg.argument;
if (unary.operator == UnaryOperator.MINUS) {
if (unary.inner is RealLiteral) {
var lit = (RealLiteral) unary.inner;
return -lit.value.to_double ();
} else if (unary.inner is IntegerLiteral) {
var lit = (IntegerLiteral) unary.inner;
return -lit.value.to_int ();
}
}
}
}
}
return 0;
}
/**
* Returns the boolean value of the specified named argument.
*
* @param name argument name
* @return boolean value
*/
public bool get_bool (string name) {
// FIXME: use hash table
foreach (NamedArgument arg in args) {
if (arg.name == name) {
var lit = arg.argument as BooleanLiteral;
if (lit != null) {
return lit.value;
}
}
}
return false;
}
}
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