The constant 0 has to convert to NULL, but nonconstant zeroes don't, and NULL doesn't have to be 0 when converted back to an integer. This would break code lik

The constant 0 has to convert to NULL, but nonconstant zeroes don't, and NULL doesn't have to be 0 when converted back to an integer. This would break code like the example offsetof implementation. See also http://stackoverflow.com/questions/2597142/when-was-the-null-macro-not-0 http://stackoverflow.com/questions/2597142/when-was-the-null...