Re: grammar triviality with '&&'

[Vincent Lefevre <vincent@xxxxxxxxxx>]

On 2015-03-01 13:49:38 -0500, Lawrence Velázquez wrote:
> On Mar 1, 2015, at 12:01 PM, Ray Andrews <rayandrews@xxxxxxxxxxx> wrote:
> [...] From zshmisc(1):
> 
>     A list is a sequence of zero or more sublists, in which each sublist
>     is terminated  by `;', `&', `&|', `&!', or a newline.
> 
> In your second example, `[ -e file1 ]` constitutes a list.

However "&& [ -e file2 ]" could constitute a list too. There is
currently a parse error, but zsh could have an extension to accept
it as being equivalent to: "[[ $? -eq 0 ]] && [ -e file2 ]". Would
there be anything wrong with such an extension?

Similarly, "|| X" could be regarded as equivalent to
"[[ $? -ne 0 ]] || X" by zsh.

-- 
Vincent Lefèvre <vincent@xxxxxxxxxx> - Web: <https://www.vinc17.net/>
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