Fasta parser

[bioinfornatics]

Le dimanche 11 novembre 2012 à 18:34 +0100, bioinfornatics a écrit :
> Hi,
> I wrote a fasta parser for biology computing
> http://pastebin.geany.org/yheQN/
> 
> I would like to get your experience to know if the writer could be
> better. The given parser use MmFile and Phobos range.
> 
> fasta specification format => http://en.wikipedia.org/wiki/FASTA_format
> 

Here i continue to enhance the parser i fail about reverse range:
http://dpaste.dzfl.pl/1f0aef89

i need to initialize the range:
- popFront if we go forward
- popBack if we go back

how can i detect this instead to use the boolean isForward?