On 11/11/2012 03:55 PM, bioinfornatics wrote:
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?


If a range provides back() and popBack() in addition to front() and popFront() then it looks like a BidirectionalRange. The users would expect to use a byFasta struct as a BidirectionalRange.

However, both front() and back() use the same member, _fasta, meaning that the front and back of the range are the same.

I am not familiar with the Fasta format but if it is not by nature bidirectional, I think you shouldn't provide back() and popBack().

Ali

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