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/* valaenum.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 an enum declaration in the source code.
*/
public class Vala.Enum : TypeSymbol {
/**
* Specifies whether this is a flags enum.
*/
public bool is_flags {
get {
if (_is_flags == null) {
_is_flags = get_attribute ("Flags") != null;
}
return _is_flags;
}
}
private List<EnumValue> values = new ArrayList<EnumValue> ();
private List<Method> methods = new ArrayList<Method> ();
private List<Constant> constants = new ArrayList<Constant> ();
private bool? _is_flags;
/**
* Creates a new enum.
*
* @param name type name
* @param source_reference reference to source code
* @return newly created enum
*/
public Enum (string name, SourceReference? source_reference = null, Comment? comment = null) {
base (name, source_reference, comment);
}
/**
* Appends the specified enum value to the list of values.
*
* @param value an enum value
*/
public void add_value (EnumValue value) {
value.access = SymbolAccessibility.PUBLIC;
values.add (value);
scope.add (value.name, value);
}
/**
* Adds the specified method as a member to this enum.
*
* @param m a method
*/
public override void add_method (Method m) {
if (m is CreationMethod) {
Report.error (m.source_reference, "construction methods may only be declared within classes and structs");
m.error = true;
return;
}
if (m.binding == MemberBinding.INSTANCE) {
m.this_parameter = new Parameter ("this", new EnumValueType (this), m.source_reference);
m.scope.add (m.this_parameter.name, m.this_parameter);
}
if (!(m.return_type is VoidType) && m.get_postconditions ().size > 0) {
m.result_var = new LocalVariable (m.return_type.copy (), "result", null, m.source_reference);
m.result_var.is_result = true;
}
methods.add (m);
scope.add (m.name, m);
}
/**
* Adds the specified constant as a member to this enum.
*
* @param c a constant
*/
public override void add_constant (Constant c) {
constants.add (c);
scope.add (c.name, c);
}
/**
* Returns the list of enum values.
*
* @return list of enum values
*/
public unowned List<EnumValue> get_values () {
return values;
}
/**
* Returns the list of methods.
*
* @return list of methods
*/
public unowned List<Method> get_methods () {
return methods;
}
/**
* Returns the list of constants.
*
* @return list of constants
*/
public unowned List<Constant> get_constants () {
return constants;
}
public override void accept (CodeVisitor visitor) {
visitor.visit_enum (this);
}
public override void accept_children (CodeVisitor visitor) {
foreach (EnumValue value in values) {
value.accept (visitor);
}
foreach (Method m in methods) {
m.accept (visitor);
}
foreach (Constant c in constants) {
c.accept (visitor);
}
}
public override bool is_reference_type () {
return false;
}
public override bool check (CodeContext context) {
if (checked) {
return !error;
}
checked = true;
var old_source_file = context.analyzer.current_source_file;
var old_symbol = context.analyzer.current_symbol;
if (source_reference != null) {
context.analyzer.current_source_file = source_reference.file;
}
context.analyzer.current_symbol = this;
if (values.size <= 0) {
Report.error (source_reference, "Enum `%s' requires at least one value", get_full_name ());
error = true;
return false;
}
foreach (EnumValue value in values) {
value.check (context);
}
foreach (Method m in methods) {
m.check (context);
}
foreach (Constant c in constants) {
c.check (context);
}
context.analyzer.current_source_file = old_source_file;
context.analyzer.current_symbol = old_symbol;
return !error;
}
}
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