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Re: Syntax change proposal:

From: Hans Aberg
Subject: Re: Syntax change proposal:
Date: Fri, 27 Jul 2012 01:10:27 +0200

On 16 Jul 2012, at 02:02, David Kastrup wrote:

> I am currently in the process of moving parsing of durations and pitches
> into the lexer instead of the parser (because parser lookahead causes
> tricky problems, and things like c'''' and c4.... can't be parsed
> without lookahead: any number of ' and/or . may still follow).
> One really ugly problem is interpreting things like "4.".  Looks like a
> duration, but then we have
> input/regression/  line-width = 4.\cm

From the microtonal point of view, a problem is that accidentals cannot 
currently be implemented as (post-fix) operators, which if it could, would also 
fix the parsing problem, I think. So for this feature to work, an expression 
like c#>','4. (writing # for the Unicode musical sharp character, and > for a 
microtonal Persian sori) should be parsed as: first finding the note name c, 
then switching to the context of accidentals, like # > ' , etc., and when a 
digit is found, switching to the duration context. Names like "cis" are then in 
fact unnecessary.


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