implicit conversion

Benjamin Schmeling Benjamin_Schmeling at gmx.de
Mon Jan 31 14:01:56 CET 2005


Hi,

I am working on exposing a bigint class to python.  Now I've got the 
problem that methods which take an bigint as
an parameter do not accept Python longs.

For example:
import _PythonLiDIA
x=123L;
c=_PythonLiDIA.bigint();
_PythonLiDIA.gcd(c,x);


Traceback (most recent call last):
File "test.py", line 132, in ?
  _PythonLiDIA.gcd(a,x);
Boost.Python.ArgumentError: Python argument types in
  _PythonLiDIA.gcd(bigint, long)
did not match C++ signature:
  gcd(LiDIA::bigint, LiDIA::bigint)

I don't know how to achieve implicit conversion at this point, turning an
long automatically into an bigint. The other way round, turning an bigint
into long can be realized by defining __long__.

Can someone help me please?

Benjamin





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