BclAttributes.cs

/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *--------------------------------------------------------------------------------------------*/

namespace System.Runtime.CompilerServices;

[AttributeUsage(AttributeTargets.Parameter, AllowMultiple = false, Inherited = false)]
internal sealed class CallerArgumentExpressionAttribute : Attribute
{
    public CallerArgumentExpressionAttribute(string parameterName) => ParameterName = parameterName;

    public string ParameterName { get; }
}

[AttributeUsage(AttributeTargets.All, AllowMultiple = true, Inherited = false)]
internal sealed class CompilerFeatureRequiredAttribute : Attribute
{
    public const string RefStructs = nameof(RefStructs);
    public const string RequiredMembers = nameof(RequiredMembers);

    public CompilerFeatureRequiredAttribute(string featureName) => FeatureName = featureName;

    public string FeatureName { get; }

    public bool IsOptional { get; set; }
}

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
internal sealed class RequiredMemberAttribute : Attribute;