Bind to C# extension methods

[Charles]

Cobra has its own extension methods feature supported back in .NET 2.0. C# added these for .NET 3.0 (or 3.5, I forget) and uses a different declaration technique.

Cobra should be enhanced to bind method calls to C# extension methods. There are numerous .NET libraries that use these.

I don't think any of the other tickets about extension methods cover this.

Here is a test case:

@ref 'System.Core'

use System.Linq

class P

    def main
        list = [1, 2, 3, 4, 5, 6]
        assert list.elementAt(3) == 4
        assert list.select(do(x) = x * 2) == [2, 4, 6, 8, 10, 12]
        assert list.sum == 21

[hopscc]

Looking at this now ...

Assembly scan by cobra needs to detect Extension methods (marked with ExtensionAttribute) and generate a cobra Extension Node for them - currently only recognises its own extension methods ( made in cobra) but not pure C# made ones...

Also need fix cobras codegen for its extension methods so that non cobra programs
(C#) can pickup extension methods made in cobra. (just needs the right C# isnames and keywords).

Linq uses this and Generics so there will probably be additional dancing for that..

[nerdzero]

After this is done can Ticket #1 be closed?

[hopscc]

Yeah presumably.

This is coming along - recognising and generating cobra extensions from suitably tagged entries in .Net Library DLLs.

One wrinkle is that .Net allows extensions of Enums and cobra doesnt - unfortunately
such is used in Hibernate.dll..
FTM I'm just going to ignore these from a .Net dll

[Charles]

Maybe we need a ticket for the enums.