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Re: extglob syntax error in function definition

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  Re: extglob syntax error in function definition Eduardo A. Bustamante López <dualbus@gmail.com> - 2015-10-07 22:44 -0500

#11585 — Re: extglob syntax error in function definition

> Repeat-By:
> 	shopt -u extglob
> 	isnum () ( shopt -s extglob; case "$1" in  [1-9]*([0-9])) return 0 ;; *) return 1 ;; esac; )

Remember that bash parses and interprets the script line-by-line. If you want
to change the parser's operation (for example, have it recognize the extglob
patterns), you have to do it in a different line than where you're using the
special syntax.

If you have: shopt -s extglob; ls @(foo|bar)

in the same line, it first processes the complete line, and fails at the
extglob, before getting to execute the shopt command.


This is not a bug btw, it's just a consequence of how bash works.

-- 
Eduardo Bustamante
https://dualbus.me/

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