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- Subject: Re: Probably bug in implementation of numerical constant parsing
- From: andreas graeper <agraeper@...>
- Date: Mon, 17 Sep 2012 16:29:23 +0200
why not '64'..s if 64 is hard coded ?!
2012/9/17, Roberto Ierusalimschy <email@example.com>:
>> This string causes "malformed number" error:
>> It seems that lexer does not know that two dots are never contained in
>> numerical constant.
>> IMHO, correct parsing of numerical constant should stop before
>> concatenation operator.
> Scanners usually know very little. They seldom do backtracking or know
> about grammar. Most of them operate on the "longest sequence" rule. By
> this rule, the "correct parsing" of the string |64..'KB'| would be |64.|
> (a number), |.| (the dot operator), and |'KB'| (a literal string).
> That would give you an error anyway, only a different one.
> -- Roberto