// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
namespace Microsoft.AspNetCore.Razor;
 
public readonly struct Optional<T>(T value)
{
    public bool HasValue { get; } = true;
 
    public T Value { get; } = value;
 
    public T GetValueOrDefault(T defaultValue)
        => HasValue ? Value : defaultValue;
 
    public static implicit operator Optional<T>(T value)
        => new(value);
 
    public override string ToString()
        => HasValue ? Value?.ToString() ?? "null" : "unspecified";
}