Re: A little more regex.h pedantry

[Reuben Thomas]

On 30 July 2010 23:33, Eric Blake <address@hidden> wrote:
>>  and `no_sub' can't be set (because re_compile
>> always overwrites it, as it does newline_anchor).
>
> Did you compile a pattern with grouping ()?  I'm not sure, but the
> behavior on no_sub may be conditional on whether there are any
> sub-fields to return in the first place.

The code in re_compile_pattern says:

  /* And GNU code determines whether or not to get register information
     by passing null for the REGS argument to re_match, etc., not by
     setting no_sub, unless RE_NO_SUB is set.  */
  bufp->no_sub = !!(re_syntax_options & RE_NO_SUB);

It doesn't seem to be conditional on grouping.

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