On: Zero size arrays in C

[to3m]

Prior to its deletion for reasons unknown, there was a post that (reading between the lines) was calling you out on the term "access", which doesn't appear to encompass writing: http://port70.net/~nsz/c/c11/n1570.html#3.1

I'd class that as a valid quibble, if my interpretation is correct, but a quibble nonetheless. The general intent is clear enough from the standard, I think: http://port70.net/~nsz/c/c11/n1570.html#6.7.2.1p18

Further reading on the subject of undefined behaviour (apropos of nothing in particular): http://port70.net/~nsz/c/c11/n1570.html#3.4.3p1, http://robertoconcerto.blogspot.co.uk/2010/10/strict-aliasin..., https://groups.google.com/forum/#!msg/boring-crypto/48qa1kWi..., http://blog.metaobject.com/2014/04/cc-osmartass.html

[joosters → to3m]

Your second link seems to agree with my original post, i.e. it is not UB. Read on to point 20: http://port70.net/~nsz/c/c11/n1570.html#6.7.2.1p20 and it talks about my example of putting the struct in a malloc'd area of memory with space after the struct.