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

There is no such function in the Standard Library. You could write a set of template functions :

template  void ParAssign(T1& Lhs_1, T1 const& Rhs1);
template  void ParAssign(T1& Lhs1, T2& Lhs2, T1 const& Rhs1, T2 const& Rhs2);
// etc.
ParAssign(a,b,
          b,a);

That's non-trivial if there is aliasing, as in your swap example.