Question

How to get ‘System.Type’ of the module?

For example module:

module Foo =
     let bar = 1

And this does not work:

printfn "%s" typeof<Foo>.Name

Error is:

The type 'Foo' is not defined

Answer 1

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

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.