[R] Class definition and "contains": No definition was found for superclass

[Martin Morgan]

On 12/10/2012 07:01 AM, Johannes Graumann wrote:
> Hi,
>
> What goes wrong when the following error shows up:
>> Error in reconcilePropertiesAndPrototype(name, slots, prototype,
>> superClasses,  :
>>    No definition was found for superclass “sequencesuperclass” in the
>>    specification of class “sequences”
>
> Has this something to do with recursive class inheritance? "sequences"
> contains "sequencessuperclass" contains "rcfpdsuperclass" ...
>
> Any hint is highly appreciated.

Hi Joh --

If I say

   setClass("B", contains="A")

I get

Error in reconcilePropertiesAndPrototype(name, slots, prototype, superClasses,  :
   no definition was found for superclass "A" in the specification of class "B"

whereas if I first define class A everything is fine

 > setClass("A")
 > setClass("B", contains="A")

In a package is it important to control the order classes are defined, e.g., by 
defining them in a file AllClasses.R or by using the Collate: field of the 
DESCRIPTION file.

Hope that helps.

Martin
>
> Sincerely, Joh
>
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