Auto free on zlists should use strcmp?

[sphaero]

If you are using zlist_autofree (usually for storing strings) is there any situation imaginable where you don't want to use strcmp as a comparator function?

As zlist_autofree duplicates strings you can't use zlist_exists or zlist_remove if you don't set a comparator.

So why not set the comparator automatically?

zlist_comparefn (mylist, (zlist_compare_fn *) strcmp);

[bluca]

backward compat, probably?

[sphaero]

I don't that would be an issue.
If you use zlist_autofree char pointers are implied:

czmq/src/zlist.c

Lines 183 to 186 in 062aeb3

	if (self->autofree) {
	item = strdup ((char *) item);
	assert (item);
	}

Using it like that renders the zlist_remove and zlist_exists useless as they compare pointers by default which is of no use as the strings are duped.

So if people are using zlist_autofree they need to set a compare function if they want any useful functionality. We can at least set it to a sane default. If people want something different they would already set so.

[stale]

This issue has been automatically marked as stale because it has not had recent activity for 90 days. It will be closed if no further activity occurs within 21 days. Thank you for your contributions.

[sphaero]

I still think this is a proper user friendly suggestion