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Message #13255
Re: Forward-compatibility in s-expression formats
On Wed, May 07, 2014 at 12:48:22AM +0100, John Beard wrote:
> I would have thought this would exactly be done at the end of tokenisation -
> this is when the current parser says "erk, i expected one of 'fp_line',
> 'pad', ...., I give up now, no footprint for you". Instead, what it could do
> is go, "hmm, don't know what this is, I'll keep this bit - up to the
> matching paren - for later in case we save it back, and move on".
More or less, that's the idea :D
There are various ways to do this but all depends on the flexibility
required and the current architecture of the parser. Whole books have
been written on the issue...
--
Lorenzo Marcantonio
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