Re: some Page/PageData const stuff

On 03.01.26 18:23, Andres Freund wrote:
> On 2026-01-03 18:05:19 +0100, Peter Eisentraut wrote:
>> On 02.01.26 20:17, Andres Freund wrote:
>>> On 2025-01-20 15:01:08 +0100, Peter Eisentraut wrote:
>>>> This has been committed.
>>>
>>> I don't like the const markings in PageGetItem():
>>>
>>>
>>> /*
>>> * PageGetItem
>>> * Retrieves an item on the given page.
>>> *
>>> * Note:
>>> * This does not change the status of any of the resources passed.
>>> * The semantics may change in the future.
>>> */
>>> static inline void *
>>> PageGetItem(const PageData *page, const ItemIdData *itemId)
>>> {
>>> Assert(page);
>>> Assert(ItemIdHasStorage(itemId));
>>>
>>> return (void *) (((const char *) page) + ItemIdGetOffset(itemId));
>>> }
>>>
>>> The const for PageData seems like a lie to me, because we cast it away. And
>>> indeed, we often then use the returned value to set hint bits etc.
>>
>> I agree this is incorrect. Since no callers appear to rely on the const
>> qualification of the argument, the easiest solution would be to just remove
>> it. See attached patch.
>
> LGTM

committed