On Nov 7, 2007 4:45 PM, Matthieu Brucher <matthieu.brucher@gmail.com> wrote:
Unfortunately, operations on boolean are not the same as operations on integers, so you can't replace one with another.
I don't understand. I'm thinking of most math functions in the C-library. In C a boolean is just an integer of 0 or 1 (quasi, by definition). Could you explain what you mean ? Thanks, Sebastian
2007/11/7, Sebastian Haase < haase@msg.ucsf.edu>:
O.K., so sizeof(bool) is 1. But I already have a function instantiation for uint8.
The problem is that without doing "some magic" the compiler (?, or numpy ?) would never allow to use anything but a "dedicated" bool-typed function for bool. Even though the CPU treats bool exactly like an integer of same byte-width.
How can I have numpy (or is SWIG the problem ??) use my existing integer function for a bool-type array ? (Without making a differently-typed copy of course ...)
Thanks, Sebastian
PS: I'm not using the C++ std library.
On Nov 7, 2007 2:54 PM, Matthieu Brucher <matthieu.brucher@gmail.com> wrote:
Hi,
No, a bool is not an int32. Try just sizeof(bool) to be sure (on my box, it's one). Besides, if you use a std::vector of bool, be aware of the fact that it is not like the other vectors.
Matthieu
2007/11/7, Sebastian Haase < haase@msg.ucsf.edu>:
Hi, I have a templated function written in C++. My SWIG typemap instantiates this for many argument array types (such as unit8, int16, uint16, int32, float32,float64,...) All works well, except when feeding in a boolean array as in seb.mmms(a>6) I get this error: NotImplementedError: No matching function for overloaded 'mmms'
What should I do ? Preferably I would avoid having to add another type-instantiation into the library (it looks already quite bloated having 6+ versions of every function). Isn't bool just a synonym for int32 ?
Thanks Sebastian Haase _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
-- French PhD student Website : http://miles.developpez.com/ Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92 LinkedIn : http://www.linkedin.com/in/matthieubrucher _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
_______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
-- French PhD student Website : http://miles.developpez.com/ Blogs : http://matt.eifelle.com and http://blog.developpez.com/?blog=92 LinkedIn : http://www.linkedin.com/in/matthieubrucher _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion