On Tue, Jul 14, 2015 at 6:57 AM, Ehsan Akhgari <ehsan.akhg...@gmail.com>
wrote:

> On 2015-07-13 3:07 PM, Jeff Gilbert wrote:
>
>> On Sun, Jul 12, 2015 at 6:45 PM, Thomas Zimmermann <
>> tzimmerm...@mozilla.com>
>> wrote:
>>
>>  Am 08.07.2015 um 16:36 schrieb smaug:
>>>
>>>> Do you actually have any data how many % of Gecko devs would prefer
>>>> not using aFoo?
>>>>
>>>
>>> I strongly prefer 'aFoo' over 'foo' for the extra context that it gives
>>> to the variable. If we want to change anything we should rather
>>> introduce a separate prefix for output parameters.
>>>
>>>
>> Which part of this extra context is useful?
>>
>
> Repeating what Kats said elsewhere in the thread which seems to have been
> completely ignored in the pile of messages here:
>
> When debugging in a text based debugger such as gdb, sometimes you have a
> variable called aFoo which has the wrong value, and with the existing
> naming convention, you can quickly run "up" in the debugger to go to caller
> frames looking for the first time the argument is called something without
> an 'a' prefix, and then you look to see where the value was computed.  If
> we remove this naming convention, you would have to do that work in every
> frame, which would make debugging the same scenario much more time
> consuming.
>
> Note that if you mostly use a graphical debugger such as Visual Studio,
> you may not rely on this because the debugger would show you more of the
> code in each frame, but I believe graphical debuggers are a niche among
> Mozilla developers.
>

That assumes that the 'Foo' of aFoo is stable across function boundaries,
which is not always the case.

- Kyle
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