如何使用F＃语法将Type作为属性参数传递？

本文介绍了如何使用F＃语法将Type作为属性参数传递？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

FsCheck在其NUnit集成中允许自定义任意：

FsCheck allows a custom Arbitrary in its NUnit integration:

[<Property(Verbose = true, Arbitrary= [typeof<Test.Arithmetic.MyArb>])>] static member MultiplyIdentity (x: int64) = x * 1 = x

此语法无效。我感到有些尴尬，但是显然我以前从未用过：您如何在F＃中将类型指定为属性参数？ Microsoft 对此一无所知，也没有 Wikibooks项目，我在查找时遇到了一些麻烦（ type 无处不在。

This syntax doesn't work. I feel a bit embarrassed to ask, but apparently I never needed this before: how do you specify the type in F# as an attribute parameter? Microsoft says nothing about it, nor does the Wikibooks project and I have some trouble googling this (the word type is omnipresent).

注1：任意参数的类型为键入[] 。

Note 1: the Arbitrary parameter is of type Type [].

推荐答案

我认为您已经接近了，但是 [1; 2; 3] 创建一个 list< int> ，您希望使用 [| 1; 2; 3 |] ：

I think you're close, but [1;2;3] creates a list<int>, you want an array literal using [| 1;2;3 |]:

[<Property(Verbose = true, Arbitrary= [| typeof<Test.Arithmetic.MyArb> |])>] static member MultiplyIdentity (x: int64) = x * 1 = x