如何在F#中继承C#泛型抽象类

Question

我有一个 C# 中的抽象泛型类

public abstract class PaymentSystemBase<
    TPayInSettings,
    TPayOutSettings,
    TRefundSettings,
    TCashierContract,
    TPayoutContract
> : IPaymentSystemInitializable, IPaymentSystem

    where TPayInSettings : BasePayInPaymentSystemSettings, new()
    where TPayOutSettings : BasePayOutPaymentSystemSettings, new()
    where TRefundSettings : BaseRefundPaymentSystemSettings, new()
    where TCashierContract : PaymentSystemBaseCashierContract, new()
    where TPayoutContract : PaymentSystemBasePayOutContract, new()
{
..
}

这是我的 F# 代码：

module Main =
    type CheckoutPaymentIdealUnitTest =
        inherit PaymentSystemBase<
            BasePayInPaymentSystemSettings,
            BasePayOutPaymentSystemSettings,
            BaseRefundPaymentSystemSettings,
            PaymentSystemBaseCashierContract,
            PaymentSystemBasePayOutContract
        > with
        member x = 1

IDE 抛出错误

The type 'PaymentSystemBase<....>' is not an interface type

是否可以在 F# 中继承 C# 泛型抽象类以及如何正确执行？

我希望收到类似的课程，但在 F# 中：

public class PaymentSystem : PaymentSystemBase<
    ..,
    ...,
    ...,
    ...,
    ...
>
{
...
}

Answer 1

需要指定主构造函数来定义只有一个默认构造函数。请参阅 docs（请参阅上面显示默认构造函数的示例）。

所以类似：

module Main =
    type CheckoutPaymentIdealUnitTest() =
        inherit PaymentSystemBase<
            BasePayInPaymentSystemSettings,
            BasePayOutPaymentSystemSettings,
            BaseRefundPaymentSystemSettings,
            PaymentSystemBaseCashierContract,
            PaymentSystemBasePayOutContract
        >() with
        member x = 1