Generic range to read array or a file as a phobos range

[bioinfornatics]

Dear,

By using CTFE I try to get a generic range to read array or a 
file as a phobos range. code hosted here: 
http://dpaste.dzfl.pl/1f2bcf39

that works fine for array but for a File instance .eof seem to 
not return true a right time.

Soemone could say what happen ?

Thanks