> Applying the increment or decrement operators over the same variable more than once on the same line should be a compile-time error That would be nice, but d

> Applying the increment or decrement operators over the same variable more than once on the same line should be a compile-time error That would be nice, but don't forget the more general case of pointers and aliasing: int a = 5; int *pa = &a; printf("%d", (a++ + ++*pa)); The compiler cannot statically catch every possible instance of a statement where a variable is updated more than once.