[IronPython] Can't dir ArgIterator

[Michael Foord]

Curt Hagenlocher wrote:
> That's pretty much what we would have to do as well -- special-case 
> based on the type name.  It seems to be more trouble than it's worth.

Based on type name or by catching the error? Catching the error and not 
propagating it to the user seems to be more robust - if it happens for 
this class then presumably it can happen elsewhere and calling dir 
really shouldn't raise an exception. Returning an empty list would be 
much more friendly.

Anyway, I'll leave my workaround in place and vote for the issue.

Michael

>
> On Mon, Apr 27, 2009 at 8:25 AM, Michael Foord 
> <fuzzyman at voidspace.org.uk <mailto:fuzzyman at voidspace.org.uk>> wrote:
>
>     Curt Hagenlocher wrote:
>
>         I ran into this a few months back and concluded that it was
>         some kind of internal CLR issue. ArgIterator is a special
>         type, most of whose methods are internal and/or unsafe, and
>         the CLR doesn't seem to like it when we try to specialize a
>         generic method using that type.
>
>
>     I'm using a Wing script to generate 'pi files' (interface files)
>     to give me autocomplete on .NET assemblies and types. It
>     introspects everything in the module and dies when it hits
>     ArgIterator.
>
>     I can put code in it to workaround it, but pthpththpbt... :-)
>
>     Michael
>
>
>         Is there any particular goal you have where you're trying to
>         use ArgIterator?
>
>         On Mon, Apr 27, 2009 at 7:54 AM, Michael Foord
>         <fuzzyman at voidspace.org.uk <mailto:fuzzyman at voidspace.org.uk>
>         <mailto:fuzzyman at voidspace.org.uk
>         <mailto:fuzzyman at voidspace.org.uk>>> wrote:
>
>            Hello guys,
>
>            >From a standard install of IronPython 2.0.1 on Vista 64,
>         calling
>            dir on System.ArgIterator blows up:
>
>            C:\compile>"C:\Program Files (x86)\IronPython 2.0.1\ipy.exe" -D
>            -X:TabCompletion
>            -X:ColorfulConsole
>            IronPython 2.0 (2.0.0.0) on .NET 2.0.50727.3074
>            Type "help", "copyright", "credits" or "license" for more
>         information.
>            >>> from System import ArgIterator
>            >>> dir(ArgIterator)
>            Traceback (most recent call last):
>             File "<stdin>", line 1, in <module>
>            SystemError: An attempt was made to load a program with an
>            incorrect format. (Ex
>            ception from HRESULT: 0x8007000B)
>            >>>
>
>
>            Michael
>
>            --    http://www.ironpythoninaction.com/
>            http://www.voidspace.org.uk/blog
>
>
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