Am Di., 6. Apr. 2021 um 23:04 Uhr schrieb Bruno Haible <br...@clisp.org>:
> > > But when designing a general utility, for all kinds of programs to use, > > > it is inappropriate to say "storing null elements is not useful". > > > > I'm afraid we'll have to disagree here. > > In some of my uses of the gl_list module, the element is in fact a small > integer, cast to an 'uintptr_t' and then further cast to a 'const void *'. > If the API would forbid storing a NULL pointer, my specialized container > type would need a workaround for storing the integer value 0. > NULL can also be a sensible value for "holes" in the list showing up in algorithms that need to lazily remove elements (e.g. the list will only be eventually compactified).
