* Jonathan Wakely via Gcc-help: > And G++ does allow arithmetic involving a void* and an integer, e.g. > p1 - 32 or p2 + 64, it doesn't allow subtracting one void* from the > other. So the extension is only partially supported for C++. We should > probably document that. And it's a regression, GCC 2.7.2.3 can compile it, but GCC 2.95.2 cannot. (Of course, I'm only half-serious here.) The problem I see with such extensions in C++ is that they could alter SFINAE outcomes. But maybe that's less important these days because people don't write custom type traits anymore. Thanks, Florian