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Postings from November 2000
At 09:58 AM 11/29/00 -0800, Steve Fink wrote:
>As soon as the lexer sees "s#", it
>starts treating # as a delimiter -- it doesn't need to conditionally
>treat the # as either a delimiter or a comment. (Especially since
>there's nothing following it that could resolve the ambiguity!)
One thing I've been thinking about is setting up a host of symbolic
representations of things like comment characters and end-of-statement
delimiters and things. That way, rather than hardcoding # as the comment
character (which it sometimes isn't) we look for the generic "comment
sequence". Makes things like q## more generically handleable, and it also
means that if we put in, say, c_mode.pm, it can set the close-comment
sequence to */.
It seems we'll need to do is weight various lexical constructs, so that the
open-quote sequence is checked for before the comment sequence. (Unless we
want to do some sort of probabalistic thing, or turn the whole parser into
a big neural net or something...)
Dan
--------------------------------------"it's like this"-------------------
Dan Sugalski even samurai
dan@sidhe.org have teddy bears and even
teddy bears get drunk
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