PetitParser - skip everything up to X

>
> I've been playing with PetitParser and I keep running into what seems like a
> common case.  I want to skip everything up to the first match of my second
> parser.
> For example, if I don't care about anything in a string that comes before
> 'dd', I write:
> parser2 := 'dd' asParser negate plus, 'dd' asParser ==> [ :nodes | nodes
> second ].
> parser2 parse: 'kslkxjclkxjcdd'. "Returns  'dd'"
>
> This gets the job done, but seems awkward. What's the most elegant way?
> I thought maybe "'dd' asParser not plus, 'dd' asParser."
> But the image just hangs.
>
> Thanks.
> Sean
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>
> What do you think of adding it to the API?
>
> Something like  http://forum.world.st/file/n3038839/PPParser-skipUntil.st
> PPParser-skipUntil.st :
>
> PPParser>>skipUntil
>
>        ^ self negate plus, self ==> [ :nodes | nodes second ].
>
> parser2 := 'dd' asParser skipUntil.
> parser2 parse: 'kslkxjclkxjcdd'. "Returns 'dd'"
>
>
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> I doubt this is generally useful. Sometimes you might want the skipped
> input, sometimes you might want it as a token, sometimes as a trimmed
> token, sometimes you need the end as a token, sometimes the end as a
> trimmed token, sometimes both or a combination of any of the two.
>
> Lukas
>
> On 11 November 2010 20:36, Sean P. DeNigris <[hidden email]> wrote:
>>
>> What do you think of adding it to the API?
>>
>> Something like  http://forum.world.st/file/n3038839/PPParser-skipUntil.st
>> PPParser-skipUntil.st :
>>
>> PPParser>>skipUntil
>>
>>        ^ self negate plus, self ==> [ :nodes | nodes second ].
>>
>> parser2 := 'dd' asParser skipUntil.
>> parser2 parse: 'kslkxjclkxjcdd'. "Returns 'dd'"
>>
>>
>> --
>> View this message in context: http://forum.world.st/PetitParser-skip-everything-up-to-X-tp3038824p3038839.html
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>
>
>
> --
> Lukas Renggli
> www.lukas-renggli.ch
>
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