In Free Pascal, if the operand(s) of an operator are constants, they will be evaluated at compile time.
will generate the same code as
Furthermore, if an array index is a constant, the offset will be evaluated at compile time. This means that accessing MyData is as efficient as accessing a normal variable.
Finally, calling Chr, Hi, Lo, Ord, Pred, or Succ functions with constant parameters generates no run-time library calls, instead, the values are evaluated at compile time.