Writing Commands

A command is a piece of code that can be run to control a unit or to get information about the world. Enu has many built in commands like forward, back, left, and right, and it's easy to add your own.

Commands start on a new line with a - and a space, followed by a name. If the command needs additional details to do its job you can list them in brackets separated by commas. Commands are blocks, so the first line ends with : and the command body is nested inside.

- hello(name):
  echo "hello ", name

- goodbye(name = "Vin"):
  echo "goodbye ", name

hello "Claire"
goodbye "Cal"

If a command produces a result its type must appear before the :. In the future this will be handled automatically.

- hello(name) string:
  result = "hello " & $name

echo hello("Scott")

Note for Nimions

A command is just a proc. Anything that can be done with commands can also be done with normal procs.

Command parameters (called details here) will default to auto if no type is provided. Each parameter is shadowed my a mutable variable inside the command body.