This is a place for defining compiler or system provided types to avoid dangling references.
These types are provided by the compiler (“built-in”) or from a required operating system, POSIX, or package header.
The largest native signed integer type.
This represents a type whose name is not known to, nor needed by, the API user. Usually this is a complex template which is consumed by other elements of the API and not intended for explicit use.
Epoch time, in seconds.