62 lines
1.9 KiB
C#
62 lines
1.9 KiB
C#
using System;
|
|
|
|
namespace Barotrauma
|
|
{
|
|
public abstract class Either<T, U>
|
|
{
|
|
public static implicit operator Either<T, U>(T t) => new EitherT<T, U>(t);
|
|
public static implicit operator Either<T, U>(U u) => new EitherU<T, U>(u);
|
|
|
|
public static explicit operator T(Either<T, U> e) => e.TryGet(out T t) ? t : throw new InvalidCastException($"Contained object is not of type {typeof(T).Name}");
|
|
public static explicit operator U(Either<T, U> e) => e.TryGet(out U u) ? u : throw new InvalidCastException($"Contained object is not of type {typeof(U).Name}");
|
|
|
|
public abstract bool TryGet(out T t);
|
|
public abstract bool TryGet(out U u);
|
|
|
|
public abstract bool TryCast<V>(out V v);
|
|
|
|
public abstract override string ToString();
|
|
}
|
|
|
|
public sealed class EitherT<T, U> : Either<T, U>
|
|
{
|
|
public readonly T Value;
|
|
|
|
public EitherT(T value) { Value = value; }
|
|
|
|
public override string ToString()
|
|
{
|
|
return Value.ToString();
|
|
}
|
|
|
|
public override bool TryGet(out T t) { t = Value; return true; }
|
|
public override bool TryGet(out U u) { u = default(U); return false; }
|
|
|
|
public override bool TryCast<V>(out V v)
|
|
{
|
|
if (Value is V result) { v = result; return true; }
|
|
else { v = default(V); return false; }
|
|
}
|
|
}
|
|
|
|
public sealed class EitherU<T, U> : Either<T, U>
|
|
{
|
|
public readonly U Value;
|
|
|
|
public EitherU(U value) { Value = value; }
|
|
|
|
public override string ToString()
|
|
{
|
|
return Value.ToString();
|
|
}
|
|
|
|
public override bool TryGet(out T t) { t = default(T); return false; }
|
|
public override bool TryGet(out U u) { u = Value; return true; }
|
|
|
|
public override bool TryCast<V>(out V v)
|
|
{
|
|
if (Value is V result) { v = result; return true; }
|
|
else { v = default(V); return false; }
|
|
}
|
|
}
|
|
} |