On 10/13/2010 05:48 PM, Bruno Haible wrote: > But the braces are a GNU extension, and the doc > <http://www.gnu.org/software/libc/manual/html_mono/libc.html> > is pretty clear that {..,..} _will_ generate duplicates.
As near as I can tell, this is an accident, both of the libc implementation and of the documentation. I don't think users expect or want the duplicates. The fact that there are duplicates was a complete surprise to me, and I've been using this notation for decades. > The expansion size is still exponential in the input size: Yes, quite true.
