[TxMt] Re: Help with a Language Regex?

[Allan Odgaard]

On 25 Jan 2011, at 00:51, Charles Turner wrote:

> Stumped over the following regex for a block comment:
> 
>> begin = '(?<=0 : 0$)';
> 
> This actually works, but I need to generalize it to one or more whitespace characters between the "0" and ":", and then between the colon and final zero.

Can you quote the rule for block comments?

Look-behind is generally a bad thing to use in grammars, so I would suggest you revise your approach. Normally this is done by matching the stuff leading up to the block comment (setting the right context).