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/* valagenerictype.vala
*
* Copyright (C) 2008-2009 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;
/**
* The type of a generic type parameter.
*/
public class Vala.GenericType : DataType {
/**
* The referred generic type parameter.
*/
public weak TypeParameter type_parameter {
get {
return (TypeParameter) type_symbol;
}
}
GenericDupField? dup_field;
GenericDestroyField? destroy_field;
public GenericType (TypeParameter type_parameter, SourceReference? source_reference = null) {
base.with_symbol (type_parameter, source_reference);
// type parameters are always considered nullable
this.nullable = true;
}
public override DataType copy () {
var result = new GenericType (type_parameter);
result.source_reference = source_reference;
result.value_owned = value_owned;
result.nullable = nullable;
result.floating_reference = floating_reference;
return result;
}
public override DataType get_actual_type (DataType? derived_instance_type, List<DataType>? method_type_arguments, CodeNode? node_reference) {
var result = this.copy ();
if (derived_instance_type == null && method_type_arguments == null) {
return result;
}
result = SemanticAnalyzer.get_actual_type (derived_instance_type, method_type_arguments, (GenericType) result, node_reference);
return result;
}
public override DataType? infer_type_argument (TypeParameter type_param, DataType value_type) {
if (type_parameter == type_param) {
var ret = value_type.copy ();
ret.value_owned = true;
return ret;
}
return null;
}
public override string to_qualified_string (Scope? scope = null) {
return type_parameter.name;
}
public override Symbol? get_member (string member_name) {
if (member_name == "dup") {
return get_dup_field ();
} else if (member_name == "destroy") {
return get_destroy_field ();
}
return null;
}
unowned GenericDupField get_dup_field () {
if (dup_field == null) {
dup_field = new GenericDupField (source_reference);
dup_field.access = SymbolAccessibility.PUBLIC;
}
return dup_field;
}
unowned GenericDestroyField get_destroy_field () {
if (destroy_field == null) {
destroy_field = new GenericDestroyField (source_reference);
destroy_field.access = SymbolAccessibility.PUBLIC;
}
return destroy_field;
}
}
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