### The system namespace contains functions that provide information about the
### tremor runtime system.

## Returns the name of the host where tremor is running.
##
## > ```tremor
## > use tremor::system;
## > let hostname = system::hostname();
## > ```
##
## Returns a `string`
intrinsic fn hostname() as system::hostname;

## Returns the ingest time into tremor of the current event.
##
## > ```tremor
## > use tremor::system;
## > let ingest_ns = system::ingest_ns();
## > ```
##
## Returns an `int`
intrinsic fn ingest_ns() as system::ingest_ns;

## Returns the instance name of this tremor process.
##
## > ```tremor
## > use tremor::system;
## > match system::instance() of
## >   case "tremor" => "default"
## >   # Instance names can be customized by users
## >   # TREMOR_PATH=/path/to/lib tremor -i "bob" ...
## >   case _ => "changed by user"
## > end
## > ```
##
## Returns a `string`
intrinsic fn instance() as system::instance;

## Returns the current time in epoch nanoseconds
##
## WARNING: This function is expensive, please
## avoid using it. If you can use `ingest_ns` instead.
## `ingest_ns` is virtually free as it is genreated 
## only once per event.
##
## > ```tremor
## > use tremor::system;
## > let now = system::nanotime();
## > true == system::nanotime() >= now
## > ```
##
## Returns an `int`
intrinsic fn nanotime() as system::nanotime;

## Returns the tremor version as a string
##
## > ```tremor
## > use tremor::system;
## > let version = system::version();
## > ```
##
## Returns a `string`
intrinsic fn version() as system::version;