Since I'm a bit of a glutton for punishment, and I would like to see
this feature...are there major technical hurdles as to why this has not
been implemented (e.g., I should just give up and find another way), or
is it more just a "nobody's gotten around to it because it's good enough
how it is", where I might be able to change the situation?
--rd
On 10/04/2011 05:52 PM, Dirk Eddelbuettel wrote:
On 4 October 2011 at 17:29, Richard Downe wrote:
| I'm fairly sure I'm not doing anything at all with multiple
| inheritance. This is a single instance of single inheritance.
My bad, sloppy language here.
I think I meant to say that Rcpp modules does what is in the vignette: easy
access to simple data structures, so no inheritance whatsoever at the moment.
That is of course a bit of a restriction...
| I will peruse the list; what I had seen in my searches so far had
| suggested no conclusive answer.
Thanks. I also inadvertently dropped a 'may' in my reply.
Dirk
| --rd
|
| On 10/04/2011 05:23 PM, Dirk Eddelbuettel wrote:
|> Richard,
|>
|> Welcome!
|>
|> On 4 October 2011 at 16:29, Richard Downe wrote:
|> | Is it possible to have a class wrapped in rcpp inherit directly from a
|> | superclass?
|> | E.g., I have
|> |
|> | class_<tcfaIndices>( "tcfaIndices" )
|> |
|> | .constructor<long>()
|> |
|> | .method("SetTCFADefinition",&tcfaIndices::SetTCFADefinition)
|> | .method("getTCFALabels",&tcfaIndices::getTCFALabels)
|> |
|> | ;
|> |
|> | and
|> |
|> | class_<morphologyIndices>( "morphologyIndices" )
|> |
|> | .constructor<long>()
|> |
|> | .method("getCentroidLumen",&morphologyIndices::getCentroidLumen)
|> | .method("getCentroidAdventitia",
|> |&morphologyIndices::getCentroidAdventitia)
|> |
|> | ;
|> |
|> | where the c++ class tcfaIndices inherits from c++ class morphologyIndices.
|> | I get compiler errors that suggest this is impossible (they seem to show
|> | up surrounding the cascade of calls to constructors), but was curious as
|> | to if there's a way to do this (other than, say, introducing 1 more
|> | level of abstraction, and then inserting a member variable rather than a
|> | parent class...)
|>
|> Rcpp itself is open to mulitple inheritance.
|>
|> Rcpp modules, which your question appears to be concerned with, currently
|> cannot as discussed a few times on this list. You find perusing the list
|> archives informative.
|>
|> Hth, Dirk
|>
|
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