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Re: [PATCH 1/1] execute_cmd.c: don't treat rhs of = as pattern in condit
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From: |
Greg Wooledge |
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Subject: |
Re: [PATCH 1/1] execute_cmd.c: don't treat rhs of = as pattern in conditional expressions |
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Date: |
Fri, 24 Aug 2012 10:52:32 -0400 |
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User-agent: |
Mutt/1.4.2.3i |
On Fri, Aug 24, 2012 at 10:34:44AM -0400, Chet Ramey wrote:
> > On Fri, Aug 24, 2012 at 10:01:32AM -0400, Chet Ramey wrote:
> > > On 8/24/12 8:54 AM, Michal Soltys wrote:
> > > > In case of single '=' operator used in [[ <expression> ]], rhs argument
> > > > was treated as a pattern. Only == and != should treat rhs argument as a
> > > > pattern, so this patch fixes it.
> > >
> > > Incorrect; `=' and `==' are identical.
> >
> > Perhaps he is assuming the man page is exhaustive. The section for the
> > [[ command only mentions the == and != operators:
>
> Maybe. The `CONDITIONAL EXPRESSIONS' section makes it clear they're
> identical.
string1 == string2
string1 = string2
True if the strings are equal. = should be used with the test
command for POSIX conformance.
I can see how one might interpret this to mean that == and = are only
identical for exact string comparisons, rather than pattern matching.
Re: [PATCH] rhs argument of single = in [[ <expression> ]] is also treated as pattern, Chet Ramey, 2012/08/24