The problem with top-down parsing is that it's slow. The more states and rules, the slower it is. Perl's grammar would take ages to process by a top-down parser.
Speaking as someone currently wrestling with Inline::CPP, "amen". In the interest of finding out how it was getting lost in my C++, I turned on tracing, and was presented with the spoor of something like two minutes of backtracking fury. I'm not about to try and re-implement it in Parse::YAPP, though...

/s

In reply to Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: A Macro System for Perl? by educated_foo
in thread A Macro System for Perl? by samtregar

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