From: | David Rowley <david(dot)rowley(at)2ndquadrant(dot)com> |
---|---|
To: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> |
Cc: | pgsql-committers(at)lists(dot)postgresql(dot)org |
Subject: | Re: pgsql: Remove useless default clause in switch |
Date: | 2018-04-24 01:53:32 |
Message-ID: | CAKJS1f9xM4dwZDaTEwcFgOsGx-fOkOoD-7xgNxCxGC5dyN9u=g@mail.gmail.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-committers |
On 24 April 2018 at 13:50, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> wrote:
> David Rowley wrote:
>> On 24 April 2018 at 03:12, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> wrote:
>> > Remove useless default clause in switch
>> >
>> > The switch covers all values of the enum driver variable, so having a
>> > default: clause is useless, even if it's only to do Assert(false).
>>
>> Just for my own understanding:
>>
>> I always thought that when all options were covered that we generally
>> kept a default just in case someone added another enum and forgot to
>> update the code.
>
> The compiler will emit a warning when it sees that not all cases are
> handled, so it's not necessary to have a default case.
Thank you all for explaining that. It very much makes sense now.
--
David Rowley http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
From | Date | Subject | |
---|---|---|---|
Next Message | Alvaro Herrera | 2018-04-24 17:04:06 | pgsql: Initialize ExprStates once in run-time partition pruning |
Previous Message | Alvaro Herrera | 2018-04-24 01:50:58 | Re: pgsql: Remove useless default clause in switch |