compiler error with generic method

[gauthier]

this doesn't compile:

class Sample
    shared
        def main
            print "hello"
    def method<of T>(doStuff as Func<of T>) as Response<of T>
        result = doStuff()
        return Response<of T>(value=result)

class Response<of T>
    pro value from var as T

compiled with

Code: Select all

cobra -ref:"C:\WINDOWS\assembly\GAC_MSIL\System.Core\3.5.0.0__b77a5c561934e089\System.Core.dll" test

c:\tmp\cobratickets\test.cobra(1): error: The type or namespace name "T" could not be found (are you missing a using directive or an assembly reference?)
Compilation failed - 1 error, 0 warnings
Not running due to errors above.

any idea what is wrong?

[Charles]

I'll have to take a look.

[Charles]

The bug is that when you use extended initialization on a generic class:

Response<of T>(value=result)

the code generation is done wrong and the C# compiler errors on the bad code. The temporary work around is to break it up like:

r = Response<of T>()
r.value = result

which is the same semantics.

[gauthier]

thanks, the work around is welcome

[Charles]

Well technically the bug is triggered by using extended initialization inside a generic method, but regardless, it is now fixed in the repository with a test case to lock it in. Thanks for the report.