HaxePunk/HaxePunk

package haxepunk.ds;

import haxe.ds.Either;

@:dox(hide)
abstract OneOf<L, R>(Either<L, R>) from Either<L, R> to Either<L, R>
{
    @:from public static function fromL<L, R>(val:L):OneOf<L, R> return Left(val);
    @:from public static function fromR<L, R>(val:R):OneOf<L, R> return Right(val);

    @:to inline function toL():Null<L>
    {
        return switch (this)
        {
            case Left(val): val;
            default: null;
        }
    }

    @:to inline function toR():Null<R>
    {
        return switch (this)
        {
            case Right(val): val;
            default: null;
        }
    }
}