Add null identifiers to genmatch
Mon Nov 9 14:56:00 GMT 2015
On Mon, Nov 9, 2015 at 12:17 AM, Jeff Law <firstname.lastname@example.org> wrote:
> On 11/07/2015 07:31 AM, Pedro Alves wrote:
>> Hi Richard,
>> Passerby comment below.
>> On 11/07/2015 01:21 PM, Richard Sandiford wrote:
>>> -/* Lookup the identifier ID. */
>>> +/* Lookup the identifier ID. Allow "null" if ALLOW_NULL. */
>>> id_base *
>>> -get_operator (const char *id)
>>> +get_operator (const char *id, bool allow_null = false)
>>> + if (allow_null && strcmp (id, "null") == 0)
>>> + return null_id;
>>> id_base tem (id_base::CODE, id);
>> Boolean params are best avoided if possible, IMO. In this case,
>> it seems this could instead be a new wrapper function, like:
> This hasn't been something we've required for GCC. I've come across this
> recommendation a few times over the last several months as I continue to
> look at refactoring and best practices for codebases such as GCC.
> By encoding the boolean in the function's signature, it (IMHO) does make the
> code a bit easier to read, primarily because you don't have to go lookup the
> tense of the boolean). The problem is when the boolean is telling us some
> property an argument, but there's more than one argument and other similar
> I wonder if the real benefit is in the refactoring necessary to do things in
> this way without a ton of code duplication.
I think the patch is ok as-is.
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