On 4/14/24 5:16 AM, Emanuel Attila Czirai wrote:
Bash Version: 5.2 Patch Level: 26 Release Status: releaseDescription: the [ test with -n or -z on a string that's only the angle bracket char followed by -a or -o operators, fails like: bash: [: syntax error: `-n' unexpected Repeat-By: $ [ -n ">" -a -n "something" ] || echo hmm bash: [: syntax error: `-n' unexpected hmm
I think the part your analysis is missing is that `<' and `>' are binary
operators, so this really is an ambiguous expression.
POSIX test specifies what happens when there are four or fewer arguments
(and the upcoming issue 8 will remove -a/-o/(/) altogether); when you
have more than four you're dealing with historical algorithms. Historical
parsing gave the string comparison binary operators higher precedence than
the unary operators.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU c...@case.edu http://tiswww.cwru.edu/~chet/
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