First pass at an F# Trill sample

[pshrosbree]

@cybertyche I have a simple port to F# of some of the HelloWorld sample.

I created a module of functions that map some of the main Streamable functions. These take F# functions and are in a form that is more suitable for currying. Where Trill takes Expression I have used F# lambdas as the F# Co piker seems to do a mapping for us. This defeats some of the optimizations in Trill, of course, but it is just the first pass. We may like to take a look at directly supporting quotations here. For now I have punted on optional parameters, etc.

Note, that since this was written in Rider on MacOS I had to disable the .NET Framework projects in the solution. However, I do not expect this PR to be merged. It is only to start a discussion.

[fredeil]

You should probably factor out the helper methods in a different file, otherwise it looks like a good start.

I would also argue that instead of creating TrillSamples/HelloWorldFS/, the structure should be: TrillSamples/FSharp/HelloWorld

[pshrosbree]

I agree about the separate file, however, I wanted to keep it all together for my Microsoft colleagues less familiar with F#. I am in two minds about the FSharp/* folder structure. To me, it makes F# a second class citizen to C#, and I am less than enthusiastic about apartheid. If the C# samples were in a CSharp folder the equal separate argument could be made, but that too is disturbing. :)

…

On Wed, 2 Jan 2019 at 23:49, Fredrik Eilertsen ***@***.***> wrote: ***@***.**** commented on this pull request. You should probably factor out the helper methods in a different file, otherwise it looks like a good start. I would also argue that instead of creating TrillSamples/HelloWorldFS/, the structure should be: TrillSamples/FSharp/HelloWorld — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#5 (review)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AA5KcHBQbTaYmnJu_KlqfIfJfWDPQSKOks5u_bYNgaJpZM4ZfXTz> .

[fredeil]

I agree on that, they should probably be separated in "CSharp" and FSharp".
This is used around the Microsoft repos, like https://github.com/Microsoft/FASTER