问题描述
我有以下类型:
and ListInfo() =
let mutable count = 0
// This is a mutable option because we can't have an infinite data structure.
let mutable lInfo : Option<ListInfo> = None
let dInfo = new DictInfo()
let bInfo = new BaseInfo()
member this.BaseInfo = bInfo
member this.DictInfo = dInfo
member this.LInfo
with get() = lInfo
and set(value) = lInfo <- Some(value)
member this.Count
with get() = count
and set(value) = count <- value
其中递归列表信息"是一个选项.有一个或没有一个.我需要从C#使用它,但出现错误.这是一个示例用法:
where the recursive "list info" is an Option. Either there is one or there is none. I need to use this from C# but I get errors. This is a sample usage:
if (FSharpOption<Types.ListInfo>.get_IsSome(listInfo.LInfo))
{
Types.ListInfo subListInfo = listInfo.LInfo.Value;
HandleListInfo(subListInfo, n);
}
此处listInfo的类型如上所述.我只是想检查它是否包含一个值,如果是这样,我想使用它.但是所有访问listInfo.LInfo都会给出错误该语言不支持属性,索引器或事件listInfo.LInfo ..."
here listInfo is of the type ListInfo as above. I'm just trying to check if it contains a value and if so I want to use it. But all the accesses listInfo.LInfo gives the error "Property, indexer or event listInfo.LInfo is not supported by the language..."
知道为什么吗?
推荐答案
我怀疑问题是LInfo
属性的getter/setter方法可以用于不同的类型(C#不支持).
I suspect the problem is the LInfo
property getter/setter work with different types (which isn't supported in C#).
尝试一下
member this.LInfo
with get() = lInfo
and set value = lInfo <- value
或者这个
member this.LInfo
with get() = match lInfo with Some x -> x | None -> Unchecked.defaultof<_>
and set value = lInfo <- Some value
这篇关于在C#中使用F#选项类型的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!