如何在F#中获取模块的类型 [英] How to get type of the module in F#

问题描述

如何获取模块的"System.Type"?

How to get 'System.Type' of the module?

例如模块:

module Foo =
     let bar = 1

这不起作用:

printfn "%s" typeof<Foo>.Name

错误是:

The type 'Foo' is not defined

推荐答案

拥有moduleof运算符肯定是一件好事...由于没有一个运算符，最简单的方法可能是使用F#PowerPack中的元数据库:

It would certainly be nice to have a moduleof operator... Since there's not one, the easiest way to do what you want is probably to use the Metadata library in the F# PowerPack:

#r "FSharp.PowerPack.Metadata.dll" 
open Microsoft.FSharp.Metadata

// get .NET assembly by filename or other means
let asm = ...

let fasm = FSharpAssembly.FromAssembly asm
let t = fasm.GetEntity("Foo").ReflectionType

不幸的是，这不适用于动态程序集(例如通过F#Interactive生成的程序集).您可以使用普通的System.Reflection调用执行类似的操作，但这更多地取决于对模块所采用的编译形式有很好的了解.

Unfortunately, this won't work with dynamic assemblies (such as those generated via F# Interactive). You can do something similar using vanilla System.Reflection calls, but that's more dependent on having a good understanding of the compiled form that your module takes.

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