Feature request: Add Box<T>.TryGetFrom method that return just nullable Box<T> instance without a boolean flag of success.

[AlexRadch]

Overview

Add API to get just nullable Box instance without success flag and works faster.

API breakdown

namespace CommunityToolkit.HighPerformance;

public sealed class Box<T>
{
    /// <summary>
    /// Tries to get a nullable <see cref="Box{T}"/> reference from an input <see cref="object"/> representing a boxed <typeparamref name="T"/> value.
    /// </summary>
    /// <param name="obj">The input <see cref="object"/> instance to check.</param>
    /// <returns><see cref="Box{T}"/> instance if it was retrieved correctly, otherwise see langword="null"/>.</returns>
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static Box<T>? TryGetFrom(object obj) => obj.GetType() == typeof(T) ? Unsafe.As<Box<T>>(obj)! : null;
}

Usage example

public class Some
{
    private Box<some>? box;

    public Some (object value)
    {
        box = Box<some>.TryGetFrom(value); // not Box<some>.TryGetFrom(value, out box);
    }
}

Breaking change?

No

Alternatives

I am not sure.

Additional context

No response

Help us help you

Yes, I'd like to be assigned to work on this item

[Sergio0694]

Closing this too, once again same reason as in https://github.com/CommunityToolkit/dotnet/issues/822#issuecomment-1902140162. Thank you!