[Samtools-help] samtools view -F/-f multiple times

[Dario B. <dar...@gm...>]

Hello,

The options -F and -f in `samtools view` can be specified multiple times
and the result is the same as summing the respective INT arguments. E.g.

samtools view -F 128 -F 16 ...

is the same as

samtools view -F 144 ...

Is this behaviour documented somewhere and intentional?

I'm asking because I have some scripts that rely on this behaviour so I
would like to know whether it's going to be supported or changed.

This is on samtools 1.3.1

Many thanks
Dario