Timeline for answer to What is the difference between function() and function(void)? by Ixrec

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Jul 5, 2015 at 6:42	comment	added	Keith Thompson		@ruakh: A variadic function must be declared and defined using the `...` syntax to avoid undefined behavior.
Jul 5, 2015 at 0:01	comment	added	ruakh		@KeithThompson: This question, and this answer, are talking about predeclarations, not function definitions.
Jun 16, 2015 at 20:56	comment	added	Keith Thompson		A C variadic function must be defined with the `...` syntax, and it must have at least one named parameter. Defining such a function with `()` causes undefined behavior -- and there's no way for the body of the function to use the macros defined in `<stdarg.h>` to read the parameter values. This has been the case since the 1989/1990 standard.
Jun 12, 2015 at 0:46	comment	added	ruakh		Re: "This is usually used to implement a function which can take a variable number of arguments": Are you sure about this? I don't think I've ever seen a program that used explicit parameter-lists for forward-declarations of non-variadic functions and `()` for those of variadic ones. Do you have an example of a program that uses this convention?
Jun 11, 2015 at 16:54	history	edited	Ixrec	CC BY-SA 3.0	added 115 characters in body
Jun 11, 2015 at 16:01	history	edited	user22815	CC BY-SA 3.0	Added C++ note.
Jun 11, 2015 at 15:45	history	edited	Robert Harvey	CC BY-SA 3.0	deleted 257 characters in body
Jun 11, 2015 at 15:20	history	answered	Ixrec	CC BY-SA 3.0