On 9/6/06, Chris F.A. Johnson <[EMAIL PROTECTED]> wrote:
On 2006-09-06, Andreas Schwab wrote:
> [EMAIL PROTECTED] (Paul Jarc) writes:
>
>> Mike Frysinger <[EMAIL PROTECTED]> wrote:
>>> this little bit of code doesnt work right:
>>> foo() { echo "${1:-a{b,c}}" ; }
The first '}' is interpreted as the end of the parameter expansion.
>>
>> Brace expansion happens before parameter expansion (man bash,
>> EXPANSION).
>
> Brace expansion doesn't come into play here, because the braces are
> quoted.
Quote them, and they do expand:
$ foo() { echo "${1:-"a{b,c}"}" ; }
$ foo
ab ac
However, there is a problem:
$ foo 1
1 1
Where is the second '1' coming from?
It seems
foo() { echo "${1:-"a{b,c}"}" ; } expands to
foo() { echo ${1:-ab} ${1:-ac} ; }
--
Chris F.A. Johnson <http://cfaj.freeshell.org>
===================================================================
Author:
Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)
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