RFR: 8251274: Provide utility types for function SFINAE using extra template parameters

[Kim Barrett]

> On Aug 31, 2020, at 9:43 AM, Kim Barrett <kim.barrett at oracle.com> wrote:
> 
>> On Aug 31, 2020, at 5:38 AM, Erik Österlund <erik.osterlund at oracle.com> wrote:
>> 
>> Hi Kim,
>> 
>> Looks good.
> 
> Thanks
> 
>> 
>> Thanks,
>> /Erik
>> 
>> On 2020-08-31 11:18, Kim Barrett wrote:
>>> […] OK.  Then here’s a new webrev.  (The gtest file has no changes now, but still shows up in the
>>> webrev because of the change then revert in the patch series.)  Just a full, since there seems
>>> little point in an incremental.
>>> 
>>> https://cr.openjdk.java.net/~kbarrett/8251274/open.01/

Given the changes we’ve discussed, the summary for the bug should probably be changed from
“utility types” to “utility macro”.