// OpenTween - Client of Twitter
// Copyright (c) 2019 kim_upsilon (@kim_upsilon) <https://upsilo.net/~upsilon/>
// All rights reserved.
//
// This file is part of OpenTween.
//
// This program 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.
//
// This program 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 this program. If not, see <http://www.gnu.org/licenses/>, or write to
// the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
// Boston, MA 02110-1301, USA.

#nullable enable
#pragma warning disable SA1649

namespace System.Runtime.CompilerServices
{
    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
    internal sealed class RequiredMemberAttribute : Attribute
    {
    }

    [AttributeUsage(AttributeTargets.All, AllowMultiple = true, Inherited = false)]
    internal sealed class CompilerFeatureRequiredAttribute : Attribute
    {
        public string FeatureName { get; }

        public bool IsOptional { get; init; }

        public const string RefStructs = nameof(RefStructs);

        public const string RequiredMembers = nameof(RequiredMembers);

        public CompilerFeatureRequiredAttribute(string featureName)
            => this.FeatureName = featureName;
    }
}