src/MassTransit/NullableAttributes.cs - develop - vshmidt/masstransit

src/MassTransit/NullableAttributes.cs
78 строк3 KB
Chris Patterson
Adding usage telemetry reporting, to track feature usage
13 мар 2025, 21:52
13 мар 2025, 21:52e3b5b18
using System;

#if !NET6_0_OR_GREATER && !NETSTANDARD2_1
namespace System.Diagnostics.CodeAnalysis
{
    [AttributeUsage(AttributeTargets.Parameter)]
    sealed class NotNullWhenAttribute :
        Attribute
    {
        /// <summary>Initializes the attribute with the specified return value condition.</summary>
        /// <param name="returnValue">
        /// The return value condition. If the method returns this value, the associated parameter will not be null.
        /// </param>
        public NotNullWhenAttribute(bool returnValue)
        {
            ReturnValue = returnValue;
        }

        /// <summary>Gets the return value condition.</summary>
        public bool ReturnValue { get; }
    }
}


[AttributeUsage(AttributeTargets.Parameter)]
sealed class MaybeNullWhenAttribute :
    Attribute
{
    /// <summary>Initializes the attribute with the specified return value condition.</summary>
    /// <param name="returnValue">
    /// The return value condition. If the method returns this value, the associated parameter will not be null.
    /// </param>
    public MaybeNullWhenAttribute(bool returnValue)
    {
        ReturnValue = returnValue;
    }

    /// <summary>Gets the return value condition.</summary>
    public bool ReturnValue { get; }
}


[AttributeUsage(AttributeTargets.Method | AttributeTargets.Property, Inherited = false, AllowMultiple = true)]
sealed class MemberNotNullWhenAttribute : Attribute
{
    /// <summary>Initializes the attribute with the specified return value condition and a field or property member.</summary>
    /// <param name="returnValue">
    /// The return value condition. If the method returns this value, the associated parameter will not be null.
    /// </param>
    /// <param name="member">
    /// The field or property member that is promised to be not-null.
    /// </param>
    public MemberNotNullWhenAttribute(bool returnValue, string member)
    {
        ReturnValue = returnValue;
        Members = new[] { member };
    }

    /// <summary>Initializes the attribute with the specified return value condition and list of field and property members.</summary>
    /// <param name="returnValue">
    /// The return value condition. If the method returns this value, the associated parameter will not be null.
    /// </param>
    /// <param name="members">
    /// The list of field and property members that are promised to be not-null.
    /// </param>
    public MemberNotNullWhenAttribute(bool returnValue, params string[] members)
    {
        ReturnValue = returnValue;
        Members = members;
    }

    /// <summary>Gets the return value condition.</summary>
    public bool ReturnValue { get; }

    /// <summary>Gets field or property member names.</summary>
    public string[] Members { get; }
}
#endif