Hi, For Moose related questions, there exists a dedicated mailing list: http://www.moosetechnology.org/about/contact
Related to your problem, "not" does consume the input. You want to use "negate", which is implemented as: PPParser>>negate "Answer a new parser consumes any input token but the receiver." ^ self not , #any asParser ==> #second Keep the questions flowing :) Cheers, Doru On Sat, Feb 22, 2014 at 5:25 PM, PBK Research <pe...@pbkresearch.co.uk>wrote: > Hello All > > Not sure whether this is the right forum for this question - please excuse > and point me in the right direction if I'm wrong. > > I have been playing with Moose 4.8, downloaded last October, mainly > because I am interested in PetitParser. I have been constructing fairly > trivial parsers to get to understand the system. I took as an example a > typical HTML tag, i.e. any text enclosed in angle brackets <>. My first > attempt was: > > ($< asParser, $> asParser not star, $> asParser). > > This seemed to send the parser into a loop, except in the case where there > was no text between the brackets. Floundering around, I tried: > > ($< asParser, (PPPredicateObjectParser anyExceptAnyOf: '>') star, $> > asParser). > > This worked as expected, but I was not happy with the apparent clumsiness > of the middle term. So I tried: > > ($< asParser, (PPPredicateObjectParser char: $>) not star, $> asParser). > > This again sent the parser into a loop. > > It looks as though I have some fundamental misunderstanding of the > function of 'not' in a parser, or else it is not working as specified. > Could someone kindly explain to an inquisitive idiot what is going wrong? > > Many thanks in advance > > Peter Kenny > -- www.tudorgirba.com "Every thing has its own flow"
