Compiler warning - suggest parentheses around assignment used as truth value

Question

When I try to compile the piece of code below, I get this warning:

warning: suggest parentheses around assignment used as truth value

Why does t

Answer 1

While that particular idiom is common, even more common is for people to use = when they mean ==. The convention when you really mean the = is to use an extra layer of parentheses:

while ((list = list->next)) { // yes, it's an assignment