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

如果有一个 moduleof 操作符肯定会很好...既然没有，那么做你想做的事情的最简单方法可能是使用 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 调用来做类似的事情，但这更依赖于对模块采用的编译形式的充分理解.

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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