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Can I "open" (import) a class ??
f#compilerclasses

I have a DLL called SnapLibrary.dll, written in C#.

Within this library is a namespace called Snap.

Within the Snap namespace, there are classes called

Vector and Create (among others).

I create a new F# project within VS2010.

I add a reference to SnapLibrary.dll.

Then I write the following F# code.

[1] open Snap

[2] open Snap.Create

[3] open Snap.Vector

[4] let v1 = Snap.Vector(1.0, 0.0, 0.0)

[5] let p1 = Snap.Create.Point(1.0, 0.0, 0.0)

[6 ] let v2 = Vector(2.0, 0.0, 0.0)

[7] let p2 = Point(2.0, 0.0, 0.0)

The F# compiler seems happy with line #1.

When I type the period in line #2,

the Intellisense pop-up shows me the Create class.

But I get a squiggly red line under the word "Create",

and the code won't compile. It complains that

"the namespace Create is not defined".

Same with "Vector" in line #3.

If I remove lines 2 and 3, then lines 4 and 5 work.

What I really want is for lines 6 and 7 to work.

They do not, of course, right now.

As I understand it, the F# "open" statement is allowed

to reference classes, not just namespaces. In this respect,

it behaves like VB, not like C#.

Is that correct ?? If so, where am I going wrong ???

thanks

bk

.

You cannot open a class in F#. Only namespaces and modules are openable. The fact that more completions show up in the intellisense is just a rough edge in the tooling (there is no context-sensitive filtering to know that only namespace/module completions should be shown in the open statement).

By on 10/24/2010 9:12 PM ()

> You cannot open a class in F#.

> Only namespaces and modules are openable.

Aha !! Thanks. I misunderstood what I read about this topic. I thought "module" was just F#-speak for "class". Apparently not.

So, is there some way to write a clump of code in C# or VB that F# would consider to be a module, and therefore openable ??

How about a C# static class, or a VB module ? Would those qualify as "modules" ?

thanks again

bk

By on 10/25/2010 6:13 AM ()

No; the word "module" in my previous message means "an F# module", which you cannot author in C# or VB.

By on 10/25/2010 9:06 AM ()

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