Tuple enumeration without integers or strings

[Paul]

On Sunday, 3 January 2021 at 06:05:48 UTC, frame wrote:
> The hash is also generated at compile time.

Is there an easy way for me to know when code is assessed / 
generated at compile time?
For example, is indexing a constant compile time array compile 
time or run time?
Or how about functions? The hashOf documentation does not seem to 
hint to being done at compile time.