@sleeptightAnsiC Oh, I see: the
(...) expression is not an lavalue in C, but it desn't have to be -- xx[0] is an lvalue even if xx is not, cool! (As an aside, in C you could also revert the operands for the [] operator, i.e. (1,0)[arr] should work. Because indexing is defined as addition, and addition is commutative, indexing is commutative as well, with the expected, well-defined results. That makes it obvious that the left operand does not have to be an lvalue at all.)