Re: Issue 2159 in lilypond: Patch: lexer.ll: Warn about non-UTF-8 characters

[Hans Aberg]

On 1 Jan 2012, at 20:22, address@hidden wrote:

> Updates:
>       Labels: Patch-new
> 
> Comment #2 on issue 2159 by address@hidden: Patch: lexer.ll: Warn about 
> non-UTF-8 characters
> http://code.google.com/p/lilypond/issues/detail?id=2159#c2
> 
> lexer.ll: Warn about non-UTF-8 characters
> 
> Making the warnings point to the exact bad byte rather than the
> enclosing construct would be nice.

One way to implement this might be to use the Haskell program for Flex like 
UTF-8 regular expressions I made:
  http://xcybercloud.blogspot.com/2009/04/unicode-support-in-flex.html

First make rules for the Unicode characters you want admit, followed by a '.' 
rule which picks up single excluded bytes.

Hans