hubFS: THE place for F#

I have posted three F# feature suggestions on Microsoft Connect:

https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=489356

https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=482929

https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=488312

These relate to the visual studio designer, pipelining and composition with instance methods and pipelining with monads.

If these are of interest to you, please add your comments or ratings.

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http://stevehorsfield.wordpress.com

Hi Steve,

A comment about your monadic pipeline keyword suggestion.

In your blog post you give this example:

let result = myBuilder {
  let result1 = initialValue
  let! r2 = r1 |> f1
  let! r3 = r2 |> f2
  let! r4 = r3 |> f3
  return r4 }

You don't need the intermediate values and want it to look like this

let result =
   initialValue
  |> f1
  |> f2
  |> f3

Let's say your myBuilder computation expression makes values of type MyBuilder<'a>.

f1 has type 'a -> MyBuilder<'b>
f2 has type 'b -> MyBuilder<'c>
f3 has type 'c -> MyBuilder<'d>

If we define

let (>>=) x f = myBuilder.Bind(x, f)

then we can compose the functions like this:

let f x = f1 x >>= f2 >>= f3

where f has type 'a -> MyBuilder<'d>. So it is not necessary for Microsoft to introduce a special keyword,
you can define it yourself.

Thanks Felix. I have acknowledged you and your solution on an updated post here: http://stevehorsfield.wordpress.com/2009/09/12/f-pipelined-monads-solutions-from-the-community/

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http://stevehorsfield.wordpress.com

Hi,

What do you mean by "5) Direct support for targeting Windows executables"?

thanks,

Kurt

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http://fortysix-and-two.blogspot.com/

In Visual Studio 2008 with the F# CTP, the "add project" options only allow a console application or an F# library.

You can manually edit the project settings to change this, although I had some problems with the change being correctly saved. The most reliable method I found was editing the MSBuild project file directly and then reloading in Visual Studio. I just think that:

1) The project settings should save correctly
2) There is no reason not to allow Add New Project to include an option for F# Windows Application

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http://stevehorsfield.wordpress.com

I see - indeed. Thanks.

Incidentally, it might be faster (and the F# team welcomes you) to file future bugs and suggestions ts fsbugs directly.  (It sure will give you better and faster feedback).

Kurt

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http://fortysix-and-two.blogspot.com/