On 12/13/19 6:35 PM, Bruno Haible wrote: > "Prefer intptr_t for internal representations of pointers" > > I disagree with this advice. uintptr_t ought to be used for representing the > address of a pointer.
It depends on the application. For example, with two char * pointers P and Q into an array, it can be helpful that P - Q yields the same integer as ((intptr_t) P - (intptr_t) Q), assuming the usual representation. That's not true for uintptr_t. In practice, Emacs uses uintptr_t quite a bit for things like hashes and tags; but it uses intptr_t a bit more, so the advice seems reasonable for Emacs.
