No, it would be impossible in C, the "it" here being the automatic conversion of a struct to an array of the struct's fields. Sure, you can do that pretty easily by hand in C, but you can also do it easily by hand in C++, so whatever. The point of the article is the metaprogramming.
I get the impression that ("pure") C programmers say things like that because they don't get themselves into situations where they feel they'd want the metaprogramming.
