"Assigned a value that is never used" false positive because of union

[Alan]

Cppcheck will throw this style error on this section of code

"Variable 'u.i' is assigned a value that is never used."

I think this is a false positive, because u.i does get used, just in the form of u.f in the following statement.

int main (void)
{
   union
   {
      uint32_t i;
      float f;
   } u;

   u.i = 0x41200000;

   int d = u.f + 5;

   printf("d = %d\n", d);

   return 0;
}

[Paul Fultz]

This is related to this issue: https://trac.cppcheck.net/ticket/8909

[Daniel Marjamäki]

I created a separate ticket for this: https://trac.cppcheck.net/ticket/9226