On Nov 7, 2007 4:45 PM, Matthieu Brucher <[EMAIL PROTECTED]> 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 < [EMAIL PROTECTED]>: > > 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 <[EMAIL PROTECTED]> > 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 < [EMAIL PROTECTED]>: > > > > > > > > > > > > > > > > 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 > > > > [email protected] > > > > 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 > > > [email protected] > > > http://projects.scipy.org/mailman/listinfo/numpy-discussion > > > > > > > > _______________________________________________ > > Numpy-discussion mailing list > > [email protected] > > 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 > [email protected] > http://projects.scipy.org/mailman/listinfo/numpy-discussion > > _______________________________________________ Numpy-discussion mailing list [email protected] http://projects.scipy.org/mailman/listinfo/numpy-discussion
