> The confusion is perhaps that you're thinking that my statement that we > need to specify the semantics is clearly implies that I don't think it's > a useful feature? I do think it's a useful feature, but I also think > that you can't just drop it into C++ without thinking about all the > consequences of that action.
Sure. However, I wasn't addressing the usefulness issue but rather the semantic issue of whether you lose data when converting a pointer from 64- to 32-bit by saying that the cases for which this extension is intended are such where that can't happen.
