On Thu, 5 Oct 2017, Bernd Edlinger wrote: > But why is int(*)(int) compatible to (int)(*)() but not > to int(*)(int,...) ?
I think it's a matter of what function types were possible in K&R C. <stdarg.h> variadic types weren't (there was an older <varargs.h>), and neither were types with arguments of type float or narrower-than-int integers (because those always got promoted to a wider type when passed as function arguments to an unprototyped function). And those types that were impossible in K&R C always require function prototypes. (The possibility of function types without a prototype is a legacy feature. There was some suggestion of removing it for C11, but no-one ever produced a paper for WG14 proposing the actual wording changes that would have been needed.) -- Joseph S. Myers jos...@codesourcery.com
