[viega]

It is-- if you click in to their full list, you should see it near the top in their "above the water" section, under `#pragma once`. I suspect it was added after the meme image was produced.

But, if it weren't on the iceberg page, it'd make sense. The semantics of `do { ... } while(0)` are in the standard, and the preprocessor has nothing to do with those semantics.

You are, of course, right, that the construct is used all over the place in macros for good reason, though these days every compiler I care about has the same (I believe not in the standard) syntax for statement expressions, which will work in even more contexts.

[Sharlin]

Ah, I meant that it was in the uppermost, least obscure section, "above the iceberg", not that it wasn't in the picture at all :)