xml-dev - A different comment syntax question

[David Megginson <david@megginson.com>]

Rob Cameron writes:

 > If, as I assume, the answer is that only the double hyphen case
 > is a concern, then the grammar needs to be changed.
 > 
 >    Comment ::= '<!--' (Char* - (Char* '--' Char*)) '-->'

I imagine that there would be look-ahead problems: a parser would find
'--', then see that '-' is the following character, and then report an
error.  I don't think that anything in the XML 1.0 REC currently
requires more than one character look-ahead.

As a simple work-around, I'd recommend always adding a space to the
beginning and end of your comment string before surrounding it by the
delimiters, so you'd have

  <!-- This is a comment - -->

rather than

  <!--This is a comment--->


All the best,


David

-- 
David Megginson                 david@megginson.com
           http://www.megginson.com/

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