Code review comment for lp:~pete-woods/unity-api/add-glib-assigner-class

Relax! Just look through both of them. Overall, James's approach is more elegant, I think. In particular, it doesn't need the SFINAE hackery.

Some of the comments I wrote would be nice to keep, I think.

One other thought: We should mark all methods that can't throw (I think that's like all of them) as noexcept.

And doing a pass for coding style would be good. (ptr_ instead _of _ptr, and the alignment of the member initialisers.)