Xapian discuss - Sep 2008 - Search for negation

Hi,

What is the flag to enable this feature? I assume it is enabled with
-enable-FEATURE[=ARG]

Is there a complete list of available feature flags available?  As
./configure -help doesn't list them.

Has this particular feature made it into 1.0.8?

Dan
>On Tue, Jan 30, 2007 at 03:31:50AM -0800, Rafael SDM Sierra wrote:
>> On 1/29/07, Olly Betts <olly <at> survex.com> wrote:
>>On 27/01/07, M.J. van der Veen <forward <at> mvanderveen.nl>
wrote:
>>> Is it possible to search a document that does not have a specific
>>> boolean?
>>>
>>> For instance: NOT XA1
>>
>>This is supported by SVN HEAD, but not by any released version.
>
> Currently only the AND NOT operator is avaible right? (linux NOT windows)
>Date: 2007-02-04 07:02:26 GMT
>
>I'm not quite sure what you're asking, so I'll try to be
clearer!
>
>"AND NOT" and "NOT" are synonyms (at least as of Xapian
0.9.3,
>previously only "NOT" was understood).
>
>Currently (i.e. in 0.9.9), this works:
>
>   linux NOT windows
>
>But this doesn't:
>
>    NOT windows
>
>In SVN HEAD, the latter also works (provided you enable it with the
>appropriate flag).
>
>Cheers,
>    Olly

Daniel Enright wrote:
> Hi,
> 
> What is the flag to enable this feature? I assume it is enabled with
> -enable-FEATURE[=ARG]
> 
> Is there a complete list of available feature flags available?  As
> ./configure -help doesn't list them.
> 
> Has this particular feature made it into 1.0.8?
Yes.  In fact, I believe it's been available since 1.0.0.

It's not enabled by a configure flag, though.  Such flags are for items 
which it doesn't always make sense to compile into the library.  The 
flag you're looking for is part of the query parser, and is accessed 
through the API for the query parser.  See the header file 
"queryparser.h" for details.  You're looking for
"FLAG_PURE_NOT".

-- 
Richard