[IronPython] clr.CompileSubclassTypes restrictions on list of types

[Tom Wright]

Thanks for the response. I've discovered the bug: I had

clr.CompileSubclassTypes(name, listOfTypes)

instead of

clr.CompileSubclassTypes(name, *listOfTypes)

Tom

Dino Viehland wrote:
> The restrictions are per-subclass so for example you cannot inherit
> from both a list and tuple.  The reason here is that list and tuple both
> have their own independent layout in memory and there's no relationship
> between them.  Or in your case it's set and float.
>
> CompileSubclassTypes takes an arbitrary number of parameters and those
> can be either a type (which gets compiled) or they can be a tuple of types
> which specify the collection of base types.  The latter form is generally useful 
> for  including .NET interfaces.
>
> So clr.CompileSubclassTypes("foo", (set, float)) will fail as this is
> specifying that you want 1 class which inherits from both set and float. 
>
> But you can do clr.CompileSubclassTypes("foo", set, float) and this specifies
> what you want 2 types, one that inherits from set and float.
>
> Or you can do:
>
> clr.CompileSubclassTypes("foo", (set, ), (float, )) 
>
> and again that'll work because it's specifying 2 different base types.
>
>
>   
>> -----Original Message-----
>> From: users-bounces at lists.ironpython.com [mailto:users-
>> bounces at lists.ironpython.com] On Behalf Of Tom Wright
>> Sent: Tuesday, November 10, 2009 10:08 AM
>> To: Discussion of IronPython
>> Subject: Re: [IronPython] clr.CompileSubclassTypes restrictions on list of
>> types
>>
>> Thanks the reply,
>>
>> Could you clarify slightly what you mean by the Python's normal
>> restrictions. I was guessing the restriction might be something like:
>>
>> "When compiling a list of types, if the list contains a class B which
>> inherits from A then A must be contained in the list."
>>
>> The interesting thing here is that the call to CompileSubclassTypes
>> works when we pass it one huge list of types, but not when we call if
>> repeatedly with smaller lists.
>>
>> Thanks
>> Tom
>>
>> Dino Viehland wrote:
>>     
>>> The only restrictions are the normal restrictions that Python has regarding
>>> inheritance.  In this case it looks like you're hitting that you cannot
>>> inherit from more than one base type w/ a different layout.
>>>
>>> Basically it looks like you're trying to pre-compile the equivalent of:
>>>
>>> class c(float, set): pass
>>>
>>> Which isn't legal in Python so my guess is there is an issue w/ the way you
>>> split them up.
>>>
>>>
>>>       
>>>> -----Original Message-----
>>>> From: users-bounces at lists.ironpython.com [mailto:users-
>>>> bounces at lists.ironpython.com] On Behalf Of Tom Wright
>>>> Sent: Tuesday, November 10, 2009 9:39 AM
>>>> To: Discussion of IronPython
>>>> Subject: [IronPython] clr.CompileSubclassTypes restrictions on list of
>>>>         
>> types
>>     
>>>> Hi,
>>>>
>>>> Are there any restrictions placed on the list of types that can be
>>>> passed to CompileSubclassTypes?
>>>>
>>>> We are having issues with a clr.AddReference(DllContainingSubclasses)
>>>> being very slow, so are trying to split the compiled subclasses across
>>>> multiple dlls to indicate progress between the loading of these dlls.
>>>>
>>>> However, when trying to compile a partial list of types we get the
>>>> following error:
>>>>
>>>> Traceback (most recent call last):
>>>>   File "c:\buildshare\gitrepo\precompile_subclasses.py", line 40, in
>>>> c:\buildsha
>>>> re\gitrepo\precompile_subclasses.py
>>>> TypeError: : can only extend one CLI or builtin type, not both
>>>> Microsoft.Scripti
>>>> ng.Runtime.Extensible`1[[System.Double, mscorlib, Version=2.0.0.0,
>>>> Culture=neutr
>>>> al, PublicKeyToken=b77a5c561934e089]] (for
>>>> IronPython.Runtime.Types.PythonType)
>>>> and IronPython.Runtime.SetCollection (for
>>>> IronPython.Runtime.Types.PythonType)
>>>>
>>>>
>>>> Any help is much appreciated,
>>>> Tom
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>>>>         
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