On 2024-04-03 16:43:42 +0200, Vincent Lefevre wrote: > https://pubs.opengroup.org/onlinepubs/9699919799/utilities/test.html > says for >4 arguments with XSI: > > In addition, the string comparison binary primaries '=' and "!=" > shall have a higher precedence than any unary primary. > > (note the "shall"). So, what about the following command? > > test ! = -o ! ''
Oops, "!" is not regarded as a unary primary. However, same question for test -e = -o ! '' Here, with ksh93u+m 1.0.8-1 under Debian: $ test -e = -o ! '' ; echo $? 1 which I think it is wrong (with any meaning, I don't see how the result could be 1, anyway). The other implementations regard this as an error. -- Vincent Lefèvre <vinc...@vinc17.net> - Web: <https://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
