If the value could be construed as a pool index - e.g. a sw_if_index - I always 
use u32 and ~0...

Thanks… Dave

From: vpp-dev-boun...@lists.fd.io [mailto:vpp-dev-boun...@lists.fd.io] On 
Behalf Of Jon Loeliger
Sent: Thursday, February 23, 2017 5:03 PM
To: vpp-dev <vpp-dev@lists.fd.io>
Subject: [vpp-dev] Coding Preference Question

VPPers,

As a general rule, do you guys prefer to use:

    1) An integer (i32) and -1 as a flag case,
or
    2) An unsigned integer (u32) and ~0 as the flag case?

If it matters, this is for an API value.

Thanks,
jdl

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