Re: GLR ambiguity

[Hans Aberg]

On 14 Jun 2007, at 15:09, Alessandro Di Marco wrote:

>    One way around is feeding a UTF-8 .ly file to Flex, and require  
> that  the
>    proper Unicode “...” be used, i.e. U+201C & U+201D. When U+201C   
> arrives, in
>    the lexer, start parsing a quotation string. If the  closing U 
> +201D has not
>    arrived when the paragraph, or whatever block  without the  
> construct cannot
>    survive, closes, issue an error.
>
> Thanks for the suggestion; unfortunately it is not viable because  
> the text is
> plain ascii. Considering the spaces around the quotes I could get a  
> similar
> effect, but there should be something better... does it?

You might consider hooking up a translator that converts the ASCII to  
a format like the above, as combining the many different writing  
styles and the huge problem of correct natural parsing into one  
parser is going to be very difficult to do. This will work if the  
writing style does not depend on the grammar. The style that is best,  
from the point of view of computer language construction point of  
view, is with matching pairs, because then it is easy to detect input  
errors.

  Hans Aberg