RFR: 8327173: HotSpot Style Guide needs update regarding nullptr vs NULL

[Vladimir Kozlov]

On Mon, 4 Mar 2024 09:51:16 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> doc/hotspot-style.md line 730:
>> 
>>> 728: Use `nullptr`
>>> 729: ([n2431](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2431.pdf))
>>> 730: rather than `NULL`.  Don't use (constant expression or literal) 0 for pointers.
>> 
>> Should there be any discussion here of why we want to avoid `NULL`?  Specifically the varying
>> definitions and the pitfalls of `NULL` in varargs context.  Also template and overload issues.
>
> I think it would be enough to write 1..2 sentences about this, and then defer to N2431 already linked here for more details.

I agree with Aleksey.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/18101#discussion_r1511561200