48 lines
1.1 KiB
C#
48 lines
1.1 KiB
C#
using System.Diagnostics.CodeAnalysis;
|
|
|
|
namespace Nub.Core;
|
|
|
|
public readonly struct Optional
|
|
{
|
|
public static Optional<TValue> Empty<TValue>() => new();
|
|
|
|
/// <summary>
|
|
/// Alias for creating an Optional<TValue> which allows for implicit types
|
|
/// </summary>
|
|
/// <param name="value"></param>
|
|
/// <typeparam name="TValue"></typeparam>
|
|
/// <returns></returns>
|
|
public static Optional<TValue> OfNullable<TValue>(TValue? value)
|
|
{
|
|
return value ?? Optional<TValue>.Empty();
|
|
}
|
|
}
|
|
|
|
public readonly struct Optional<TValue>
|
|
{
|
|
public static Optional<TValue> Empty() => new();
|
|
|
|
public static Optional<TValue> OfNullable(TValue? value)
|
|
{
|
|
return value ?? Empty();
|
|
}
|
|
|
|
public Optional()
|
|
{
|
|
Value = default;
|
|
HasValue = false;
|
|
}
|
|
|
|
public Optional(TValue value)
|
|
{
|
|
Value = value;
|
|
HasValue = true;
|
|
}
|
|
|
|
public TValue? Value { get; }
|
|
|
|
[MemberNotNullWhen(true, nameof(Value))]
|
|
public bool HasValue { get; }
|
|
|
|
public static implicit operator Optional<TValue>(TValue value) => new(value);
|
|
} |