how do I import functions?

[richardanaya]

[menduz]

you can reference functions by its module and name using fully qualified names

fun main(): void = {
  support::env::printf("number is %d", 1)
}

Or you can import the whole module and the names will be available locally

import support::env

fun main(): void = {
  printf("number is %d", 1)
}

The fully::qualified::names represent the path of the module starting at the root of the project / standard library.

So if you have a structure like:

// lib/folder/file.lys

struct NumberWrapper(number: i32)

fun add(a: NumberWrapper, b: NumberWrapper): NumberWrapper = 
  NumberWrapper(a.number + b.number)

// lib/main.lys
import lib::folder::file
fun main(): i32 = add(NumberWrapper(1), NumberWrapper(2))

which is the same as

fun main(): i32 = 
  lib::folder::file::add(
    lib::folder::file::NumberWrapper(1),
    lib::folder::file::NumberWrapper(2)
  )