Functions and calls

Romit defines functions in scripts with a header line and an indented body. The primary form uses a colon after the name:

sum: a, b
  give a plus b

say sum 3, 4

Definition forms (equivalent)

Parameters are comma-separated; spaces between parameters are also accepted (fn sum a b). Defaults use is, like fields elsewhere: fn greet name is "world".

No parameters use a bare header line:

hello:
  give "ready"

fn ping
  give "pong"

define with returns remains the form used inside the optional spec layer; script functions use give instead of returns.

Calls

Calls never use : or fn / function. Write the name followed by arguments on the same line:

say sum 3, 4
set x to sum 1, 2

Commas separate arguments; spaces alone work too (sum 3 4).

Named arguments at the call site use with: greet with name "Ada".

say / print with several values

When a line uses commas between separate printed values, each segment is its own expression:

say "Total: ", total
say one 1, sum 2, 3

In say one 1, sum 2, 3, the first part is the call one 1, and the second part is sum 2, 3 (that call takes the rest of the line as its arguments).

Nested calls are only allowed as the last argument on a line; otherwise assign to a variable first (see error P028).

Functions may appear before or after their use in the same file; the checker resolves every definition.