RobustToolbox/Robust.Shared/GameObjects/ComponentReferenceAttribute.cs

using System;

namespace Robust.Shared.GameObjects
{
    /// <summary>
    ///     Marks a component as having a specific reference type,
    ///     for use with <see cref="RegisterComponentAttribute"/>.
    /// </summary>
    [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
    public sealed class ComponentReferenceAttribute : Attribute
    {
        /// <summary>
        ///     The type this component is a reference to.
        /// </summary>
        public Type ReferenceType { get; }

        /// <summary>
        ///     Default constructor.
        /// </summary>
        /// <param name="referenceType">The type this component is a reference to.</param>
        public ComponentReferenceAttribute(Type referenceType)
        {
            ReferenceType = referenceType;
        }
    }
}