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/* valaintegertype.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;
/**
* An integer type.
*/
public class Vala.IntegerType : ValueType {
string? literal_value;
string? literal_type_name;
public IntegerType (Struct type_symbol, string? literal_value = null, string? literal_type_name = null, SourceReference? source_reference = null) {
base (type_symbol, source_reference);
this.literal_value = literal_value;
this.literal_type_name = literal_type_name;
}
public override DataType copy () {
var result = new IntegerType ((Struct) type_symbol, literal_value, literal_type_name, source_reference);
result.value_owned = value_owned;
result.nullable = nullable;
return result;
}
public override bool compatible (DataType target_type) {
if (target_type.type_symbol is Struct && literal_type_name == "int") {
// int literals are implicitly convertible to integer types
// of a lower rank if the value of the literal is within
// the range of the target type
var target_st = (Struct) target_type.type_symbol;
if (target_st.is_integer_type ()) {
var int_attr = target_st.get_attribute ("IntegerType");
if (int_attr != null && int_attr.has_argument ("min") && int_attr.has_argument ("max")) {
int val = int.parse (literal_value);
return (val >= int_attr.get_integer ("min") && val <= int_attr.get_integer ("max"));
} else {
// assume to be compatible if the target type doesn't specify limits
return true;
}
}
} else if (target_type.type_symbol is Enum && (literal_type_name == "int" || literal_type_name == "uint")) {
// allow implicit conversion from 0 to enum and flags types
if (int.parse (literal_value) == 0) {
return true;
}
}
return base.compatible (target_type);
}
}
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