sirh3e/Rust

namespace Sirh3e.Rust.Result;

public readonly partial struct Result<TOk, TErr>
{
    /// <summary>
    /// Calls other if the result is Err, otherwise returns the Ok value of self.
    /// This function can be used for control flow based on result values.
    /// </summary>
    /// <param name="other"></param>
    /// <returns></returns>
    /// <exception cref="ArgumentNullException">Throws only if other is null</exception>
    public Result<TOk, TErr> OrElse(Func<TErr, Result<TOk, TErr>> other)
        => Match(Ok, err => (_ = other ?? throw new ArgumentNullException(nameof(other)))(err));
}