export def add(...args)
	return args.reduce((do(a, b) a + b), 0)

if import.meta.vitest
	const {it, expect} = import.meta.vitest
	it "adds from in-source tests", do
		expect(add()).toBe 0
		expect(add(1)).toBe 1
		expect(add(1, 2, 3)).toBe 6