C++ did have variadic functions because it inherited them from C.
What it didn't inherit from C was a way to write variadic functions with variadic types, so that had to be home grown.
What it didn't inherit from C was a way to write variadic functions with variadic types, so that had to be home grown.
I don't considers this to be "proper" variadic arguments, because a functions argument has to have a type. and these, as far as I'm aware of don't have one. This is about a powerfull as passing a void**. This is essentially memcopying multiple differently typed into a char* buffer and then passing that buffer. You can than correctly copies them back you have pretty much the same behaviour. Both methodss obviously lacks important aspects of the language abstraction of a function parameter and i don't what that feature can bring to the table that the previous techniques don't.
You can get it indirectly using _Generic().