Re: [bug-gawk] can we get a warning for undefined behavior?

[arnold]

Hi.

Ed Morton <address@hidden> wrote:

> I notice that these:
>
> $ echo 'foo bar' | awk --lint '{NF--}1'        # UB: decrementing NF
> foo
>
> $ echo 'foo bar' | awk --lint 'END{print $0}'    # UB: using $0 in END
> foo bar

These two are medium hard to do. They're on my list, along with
the other things you sent in private email.

> $ echo 'foo bar' | awk --lint '/\o/'    # UB: backslash before literal char
> foo bar
>
> $ echo 'foo bar' | awk --lint '{print > "file" 1}'    # UB: unparenthesized 
> right side of I/O redirection

I have added warnings for these two and they're in the code base.

Thanks,

Arnold