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/* valatypeofexpression.vala
*
* Copyright (C) 2006-2010 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;
/**
* Represents a typeof expression in the source code.
*/
public class Vala.TypeofExpression : Expression {
/**
* The type to be retrieved.
*/
public DataType type_reference {
get { return _data_type; }
set {
_data_type = value;
_data_type.parent_node = this;
}
}
private DataType _data_type;
/**
* Creates a new typeof expression.
*
* @param type a data type
* @param source reference to source code
* @return newly created typeof expression
*/
public TypeofExpression (DataType type, SourceReference source) {
type_reference = type;
source_reference = source;
}
public override void accept (CodeVisitor visitor) {
visitor.visit_typeof_expression (this);
visitor.visit_expression (this);
}
public override void accept_children (CodeVisitor visitor) {
type_reference.accept (visitor);
}
public override bool is_pure () {
return true;
}
public override void replace_type (DataType old_type, DataType new_type) {
if (type_reference == old_type) {
type_reference = new_type;
}
}
public override bool check (CodeContext context) {
if (checked) {
return !error;
}
checked = true;
type_reference.check (context);
value_type = context.analyzer.type_type;
if (context.profile == Profile.GOBJECT && type_reference.has_type_arguments ()) {
Report.warning (_data_type.source_reference, "Type argument list without effect");
}
if (_data_type is ArrayType && ((ArrayType) _data_type).element_type.type_symbol != context.analyzer.string_type.type_symbol) {
Report.warning (_data_type.source_reference, "Arrays do not have a `GLib.Type', with the exception of `string[]'");
}
return !error;
}
public override void emit (CodeGenerator codegen) {
codegen.visit_typeof_expression (this);
codegen.visit_expression (this);
}
}
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