1+++ 2title = "Constexpr domain source" 3weight = 60 4+++ 5 6Back in [The constructor]({{< relref "/experimental/worked-example/constructor" >}}), we 7declared but did not implement a `.get()` function which returns a constexpr static 8instance of the domain. We implement this now: 9 10{{% snippet "experimental_status_code.cpp" "constexpr_source" %}} 11 12As this is 100% constexpr, it can be (and is under optimisation) implemented entirely 13in the mind of the compiler with no run time representation. 14