Re: extension of file-test primitives?

[L A Walsh]

Chet Ramey wrote:
> On 8/21/17 9:27 AM, Greg Wooledge wrote:
>   
> > You could write your own helper functions for this:
> >
> > -fx() { test -f "$1" && test -x "$1"; }
> >     
>
> This is indeed a quick and easy way to implement desired functionality.
> Shell functions can do a lot.
>   
----
   Alas, they don't work inside [[...]] with other
file-test operators:

[[ -fx /bin/ls && -s /bin/ls ]] && echo ok
-bash: conditional binary operator expected
-bash: syntax error near `/bin/ls'