Joel de Guzman wrote:
I didn't have a closer look at #6915, so I cannot answer about the ticket (sorry!). But the following test case still fails: (Test case attached.)
Yes, and I know why. Answer my concerns first (prior post) and I'll continue on the whys.
For now, I need a rest :-)
OK. Joel de Guzman wrote:
However! This makes the current result_of code not an exact replacement to decltype which allows this variation of above:
Right. boost/std::result_of is not an exact replacement to decltype, since decltype allows SFINAE but boost/std::result_of doesn't. [...]
If Fusion's invoke used decltype instead of result_of, it would have worked.
I tried to compile my test case for fusion::invoke with SFINAE-enabled result_of, but it failed to compile. After adding a "fallback type" to SFINAE-enabled result_of, then the test case runs fine. Regards, Michel