On Mon, May 09, 2011 at 03:47:19PM +0100, Ant Skelton wrote:
>
> If I'm understanding what you want correctly, it is possible to do your
> transformation in a single rule, but only if you re-jig the grammar
> slightly:
>
>
> class Parser < Parslet::Parser
> rule(:indent) { str(' ').repeat(1) }
> rule(:content) { match('[^\n]').repeat(1) }
> rule(:line) { str('\n') | indent.maybe.as(:indentation) >>
> content.maybe.as(:stuff)
> >> str("\n") }
> rule(:lines) { line.repeat }
> root(:lines)
> end
>
> class Transformer < Parslet::Transform
> # vanilla rule
> rule(:indentation => simple(:ind), :stuff => simple(:stu)) {
> [ ind.to_s.length, stu.to_s ]
> }
> end
>
>
> Although I don't think that's as easy to follow, personally.
Hello Ant,
thanks for the re-jig, it works nicely. I will go and use that for now.
Best regards,
John
