Re: gawk --lint option

[Eric Pruitt]

On Fri, Jun 26, 2020 at 09:51:45PM +0100, Denis M. Wilson wrote:
> I would like to see a value which would allow extensions and only
> complain about genuine errers.

I wrote a few patches for GAWK to make the linter more (IMO) useful:

- Change the handling of various implementation compatibility options.
  Most notably, the "--lint" option will no longer warns about non-POSIX
  features and GNU extensions unless POSIX or traditional mode has been
  explicitly enabled, and some non-standard features that were accepted
  when using one of those modes will now produce fatal errors. No
  changes to code only affecting "--lint-old" were made.
- Remove the lint heuristics for "regular expression on right of
  assignment" and "assignment used in conditional context."
- Remove the lint heuristics for "subscript of array ... is null
  string."

I recently upgraded from 4.2 to 5.1, but when I ported the largest of
the patches, I didn't do it correctly and haven't gotten around to
fixing it. Once I do, I'll share the patches here.

Eric