36 lines
1.4 KiB
C#
36 lines
1.4 KiB
C#
|
/*
|
||
|
|
Copyright (C) 2014-2019 de4dot@gmail.com
|
||
|
|
|
||
|
|
This file is part of dnSpy
|
||
|
|
|
||
|
|
dnSpy is free software: you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU General Public License as published by
|
||
|
|
the Free Software Foundation, either version 3 of the License, or
|
||
|
|
(at your option) any later version.
|
||
|
|
|
||
|
|
dnSpy 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 General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with dnSpy. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
using System;
|
||
|
|
using System.Collections.Generic;
|
||
|
|
using System.Collections.ObjectModel;
|
||
|
|
|
||
|
|
namespace dnSpy.Debugger.DotNet.Metadata {
|
||
|
|
static class ReadOnlyCollectionHelpers {
|
||
|
|
public static ReadOnlyCollection<T> Empty<T>() => EmptyClass<T>.Empty;
|
||
|
|
public static ReadOnlyCollection<T> Create<T>(T[]? array) =>
|
||
|
|
array is null || array.Length == 0 ? EmptyClass<T>.Empty : new ReadOnlyCollection<T>(array);
|
||
|
|
public static ReadOnlyCollection<T> Create<T>(IList<T>? list) =>
|
||
|
|
list is null || list.Count == 0 ? EmptyClass<T>.Empty : list as ReadOnlyCollection<T> ?? new ReadOnlyCollection<T>(list);
|
||
|
|
static class EmptyClass<T> {
|
||
|
|
internal static readonly ReadOnlyCollection<T> Empty = new ReadOnlyCollection<T>(Array.Empty<T>());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|