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Search function by signature
f#

Hello,

Let's say I know I can create a function that reverse the order of the parameters of another function in f#:

let reverse f x y = f y x

But that I want to use the function I assume exists in the Framework... is there a way for me to search function by the type signature ('a -> 'b -> 'c) -> ('b -> 'a -> 'c)?

Thanks,

David

.

It should be possible to author such a search tool by using FSharp.PowerPack.Metadata.dll, but I don't know that anyone has written it yet.

Alternatively you could probably screen-scrape the docs effectively.

It's a tool waiting to happen; someone should author it and blog it.

By on 5/18/2010 2:27 PM ()

See also [link:stackoverflow.com]

By on 5/19/2010 6:34 PM ()

This is real hardcore!

By on 5/21/2010 3:31 AM ()

There you go! Even better!

By on 5/18/2010 2:30 PM ()

It's reflection day...

I suppose you could go through all methods in your assemblies (all functions are .NET methods under the hood) and do some parameter checks:

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open System
open System.Reflection


let currentAssembly = Assembly.GetExecutingAssembly()


let getMethods (assembly : Assembly) =
    assembly.GetTypes() |> Array.fold (fun methods ass -> Array.concat [methods; ass.GetMethods()]) Array.empty<MethodInfo>


getMethods currentAssembly;;

Then you access each method's parameters with .GetParameters(), experiment a little and take it from there...

HTH
Mau

By on 5/18/2010 2:02 PM ()

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