Is it possible to concat literals in a tuple during comptime?

[permutationlock]

@timfayz

If data defined as var outside a function scope, it automatically becomes part of a type definition (struct) and thus becomes static.

Yes

@timfayz

If data defined as const, it is static as soon as it is referred somewhere regardless of whether it is within or outside the function scope. (here I think a certain pitfall is hidden with regards to stable / reliable memory addresses)

Only if its initialization value is comptime known will a const local variable become a comptime variable and thus end up having a static lifetime. I never rely on a local variable having a static lifetime unless I am working with an explicitly marked comptime variable or something else that is explicitly comptime-known like a type valued variable or a string literal.