Re: Don't cast away const where possible

Hi,

On Mon, Feb 23, 2026 at 08:24:22AM +0100, Peter Eisentraut wrote:
> I have another patch that removes some -Wcast-qual warnings, by adjusting
> some function APIs.
>
> This is as far as I get without resorting to advanced tricks like
> unconstify() or _Generic.

Yeah, so the patch removes those:

jsonapi.c:2170:53: warning: cast discards ‘const’ qualifier from pointer target type [-Wcast-qual]
jsonapi.c:2171:52: warning: cast discards ‘const’ qualifier from pointer target type [-Wcast-qual]
jsonapi.c:2172:54: warning: cast discards ‘const’ qualifier from pointer target type [-Wcast-qual]
jsonapi.c:2170:53: warning: cast discards ‘const’ qualifier from pointer target type [-Wcast-qual]
jsonapi.c:2171:52: warning: cast discards ‘const’ qualifier from pointer target type [-Wcast-qual]
jsonapi.c:2172:54: warning: cast discards ‘const’ qualifier from pointer target type [-Wcast-qual]
jsonapi.c:2170:53: warning: cast discards ‘const’ qualifier from pointer target type [-Wcast-qual]
jsonapi.c:2171:52: warning: cast discards ‘const’ qualifier from pointer target type [-Wcast-qual]
jsonapi.c:2172:54: warning: cast discards ‘const’ qualifier from pointer target type [-Wcast-qual]
ginbulk.c:247:62: warning: cast discards ‘const’ qualifier from pointer target type [-Wcast-qual]
ginbulk.c:247:79: warning: cast discards ‘const’ qualifier from pointer target type [-Wcast-qual]
parser.c:265:51: warning: cast discards ‘const’ qualifier from pointer target type [-Wcast-qual]

and looks ok.

I can see a "volatile" one though:

vacuum.c:1885:46: warning: cast discards ‘volatile’ qualifier from pointer target type [-Wcast-qual]

worth to "fix" like in the attached while at it? (It's not really a fix as it
moves the warning from vacuum.c to c.h, but that's consistent with 481018f2804).

Regards,

--
Bertrand Drouvot
PostgreSQL Contributors Team
RDS Open Source Databases
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