Parallel assignment in C++

Question

Is there any way of doing parallel assignment in C++? Currently, the below compiles (with warnings)

#include  

int main() { 
  int a = 4;
           


        

Answer 1

Or Perl. But no, it's not possible (as far as I'm aware), you need to use a temporary variable, as in:

int a = 4;
int b = 5;

{
    int tmp = a;
    a = b;
    b = tmp;
}

FYI, internally those languages (or Perl atleast) create a temporary list { a, b }, then assign the list to the two variables. In other words, this is atleast as performant, if only a little more messy.