On 2018-05-20 16:43, Bruno Haible wrote:
Kaz Kylheku wrote in
https://lists.gnu.org/archive/html/coreutils/2018-05/msg00036.html :
In what situation are there printable characters in the range [0,
UCHAR_MAX) that
have a width > 1?
That's the wrong question. The question is which characters in this
range
have width > 1 or <= 0.
The program below shows that the answer (on a glibc system) is:
The character 0x00AD (= SOFT HYPHEN) is printable but has width == 0.
I tried printing this on several terminals; all actually render
something that is one character position wide.
A program which calculates column positions on a terminal will be wrong
if 0xAD
has been printed, and it relies on this bogus datum from glibc.
