Only export what main (or the host) needs.

Goal

Export add; keep helper private.

@external("env", "log")
declare function log(n: i32): void;

@external("env", "logStr")
declare function logStr(s: string): void;

function helper(n: i32): i32 {
  return n * 40;
}
export function add(a: i32, b: i32): i32 {
  return a + b;
}
export function main(): void {
  log(add(12, helper(1) / 40));
}

@external("env", "log")
declare function log(n: i32): void;

@external("env", "logStr")
declare function logStr(s: string): void;

export function units(): i32 {
  return 12;
}
export function main(): void {
  log(units());
}

@external("env", "log")
declare function log(n: i32): void;

@external("env", "logStr")
declare function logStr(s: string): void;

function hidden(): i32 {
  return 5;
}
export function main(): void {
  log(hidden());
}

@external("env", "log")
declare function log(n: i32): void;

@external("env", "logStr")
declare function logStr(s: string): void;

export function main(): void {
  log(8);
}