2 ms·

Does “const” mean “immutable” and “constexpr” mean “compile-time” in C++? That’s funny.

• kstenerud 2y ago
  constexpr was originally intended for "things that can be computed at compile time". But for something to be computable at compile-time, it would have to also be immutable.
  • keybored 2y ago
    I can imagine a for loop with `i` which computes something over a static value where `i` isn’t immutable but is needed to compute the “constexpr” value.
    • kstenerud 2y ago
      But if `i` changes over time, then it can't be computed at compile time, because its value is dependent upon at what time it is accessed.
      • keybored 2y ago
        Looping over the calendar months seems to make sense to me.