A cast does not yield an lvalue in C (in C++ it can, if it is to a reference type). See: http://port70.net/~nsz/c/c89/c89-draft.html#3.3.4 http://port70.net/~n

A cast does not yield an lvalue in C (in C++ it can, if it is to a reference type). See: http://port70.net/~nsz/c/c89/c89-draft.html#3.3.4 http://port70.net/~nsz/c/c89/c89-draft.html#3.3.4 Footnote 36.