7 Dec
2012
7 Dec
'12
11:20 p.m.
Jeffrey Lee Hellrung, Jr. wrote: In any case, the fact that this technique is used in several other Boost libraries is a hint that there is no generally applicable workaround, and even case-specific workarounds (such as something like above) would almost surely be more onerous than just adding a defaulted Enable type template parameter to the trait for the sole purpose of enabling SFINAE to address this use case.
Jeff said better than I could. Focusing on finding a workaround for my specific use-case is beside the point. The proposed change permits the whole weight of metaprogramming to be brought to bear in a natural and idiomatic way, without the need to hunt around in the language for case-specific fixes. -Gabe