What does the “=!” operator do? [closed]

Answer 1

Important: '=!' != '!=' :)

But: '=!' == 'assignment of the negation of a value'

e.g. in pseudo:

bool a= true;
bool b=!a;

so b is false!

Answer 2

It's not a single =! operator. It's = and !, assignment and negation.

It's equivalent to if (a = !param), or

a = !param;

if (a) {

}

Answer 3

=! Is not an operator. You can understand it like this. Suppose there is a statement a=!b it is an assignment of operand b in a but here the twist is before assigning b to a we are reversing the state of b by prefixing operand b with ! which is basically logical not operator.

Answer 4

This expression:

a =! param

assigns the value !param to a. !param is negated version of param evaluated in boolean context.

Assignment operators return the value of the right hand side, so, if (a = !param) also executes the if body, if !param is true.

Answer 5

=! is not an operator. It is the = (assignment) operator, and the ! (boolean not) operator.

So you have if (a = !param). The assignment returns the value of the assignment, so you essentially have:

a = !param;
if (a) {
   ...

Answer 6

If you consider that it can be multiple tokens the effect should be simple:

if (a = !param)