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/* valaobjecttype.vala
*
* Copyright (C) 2007-2010 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;
/**
* A class type.
*/
public class Vala.ObjectType : ReferenceType {
/**
* The referred class or interface.
*/
public weak ObjectTypeSymbol object_type_symbol { get; set; }
public ObjectType (ObjectTypeSymbol type_symbol) {
this.type_symbol = type_symbol;
this.object_type_symbol = type_symbol;
}
public override DataType copy () {
var result = new ObjectType (object_type_symbol);
result.source_reference = source_reference;
result.value_owned = value_owned;
result.nullable = nullable;
result.is_dynamic = is_dynamic;
result.floating_reference = floating_reference;
foreach (DataType arg in get_type_arguments ()) {
result.add_type_argument (arg.copy ());
}
return result;
}
public override bool stricter (DataType target_type) {
var obj_target_type = target_type as ObjectType;
if (obj_target_type == null) {
return false;
}
if (value_owned != target_type.value_owned) {
return false;
}
if (nullable && !target_type.nullable) {
return false;
}
return type_symbol.is_subtype_of (obj_target_type.type_symbol);
}
public override bool is_invokable () {
var cl = type_symbol as Class;
if (cl != null && cl.default_construction_method != null) {
return true;
} else {
return false;
}
}
public override unowned DataType? get_return_type () {
var cl = type_symbol as Class;
if (cl != null && cl.default_construction_method != null) {
return cl.default_construction_method.return_type;
} else {
return null;
}
}
public override unowned List<Parameter>? get_parameters () {
var cl = type_symbol as Class;
if (cl != null && cl.default_construction_method != null) {
return cl.default_construction_method.get_parameters ();
} else {
return null;
}
}
public override bool check (CodeContext context) {
if (!type_symbol.check (context)) {
return false;
}
int n_type_args = get_type_arguments ().size;
if (n_type_args > 0 && n_type_args < object_type_symbol.get_type_parameters ().size) {
Report.error (source_reference, "too few type arguments");
return false;
} else if (n_type_args > 0 && n_type_args > object_type_symbol.get_type_parameters ().size) {
Report.error (source_reference, "too many type arguments");
return false;
}
foreach (DataType type in get_type_arguments ()) {
if (!type.check (context)) {
return false;
}
}
return true;
}
}
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