Is there a way to "assign and return" without creating a utility routine? Here’s my code:

static int& do_work_(const int* p, int& result)
{
   result = (*p) * 10;
   return result;
}

template<typename T>
T& assign(const T* p, T& result)
{
   result = *p;
   return result;
}

int& do_work(const int* p, bool cond, int& result)
{
   return cond ? do_work_(p, result) : assign(p, result);
}

Can I implement func() without the assign() utility?

---

The reason for the do_work() signature is that it’s a nice convenience:

const int value=1;
int i, j;
if (do_work(&value, true, i) == do_work(&value, false, j)) {}

>Solution :

If you want to return the result of an assignment operation you can (in most cases) do so without a ‘utility’ function like your assign, because the assignment expression itself has a value; from cppreference (bolding mine):

The direct assignment operator expects a modifiable lvalue as its left
operand and an rvalue expression or a braced-init-list (since C++11)
as its right operand, and returns an lvalue identifying the left
operand after modification.

Thus, as suggested in the comments, you can simply have the following:

int& do_work(const int* p, bool cond, int& result)
{
   return cond ? do_work_(p, result) : (result = *p);
}