[C++-sig] [Py++] Indexing suite 2: missing methods

[peoro]

On Sat, Feb 13, 2010 at 8:05 PM, Roman Yakovenko
<roman.yakovenko at gmail.com> wrote:
> On Sat, Feb 13, 2010 at 5:41 PM, peoro <peoro.noob at gmail.com> wrote:
>> Hello,
>> I noticed that some Py++ traits for standard containers are missing a
>> few methods that I think would be needed.
>> For example `set_traits' (container traits for `std::set') is missing
>> `method_len' that,  in my opinion, should be provided.
>
> It is provided.
>
>> Is this a feature or a bug? And in the former case, how would I be
>> supposed to get a set's size? explicitly exposing a `size' function
>> for it?
>
> Did you try len( x )?
>

Yes, I tried and it isn't working.

This is the C++ code I'm trying to expose using Py++:
#include <set>
std::set<int> f( ) {
	return std::set<int>();
}

Then, in python:
>>> from set_len_test import *
>>> x = f()
>>> len( x )
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: object of type 'set_less__int__greater_' has no len()

If I manually add `method_len' to `supported_methods' in
`indexing_suite/set.hpp', and compile again the module, everything
works as it should:
>>> from set_len_len import *
>>> x = f()
>>> len( x )
0

I've been trying with SVN revisions 1814 and 1824.

>
> --
> Roman Yakovenko
> C++ Python language binding
> http://www.language-binding.net/
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