# Declarations

    -- fn1()
    1 + 2 + 3

    -- fn2(n)
    #n .. " " .. #n)

    -- fn3(a, b)
    #a * #b

# Invalid Declarations

    -- misses end: fn4(
    1 + 2 + 3

    -- fn5(invalid arg)
    4 + 5 + 6

    -- misses arg: fn6()
    #n .. " " .. #n

    -- misses separator: fn7(a b)
    #a * #b

# Invalid Calls

-   fn1(1) adds arg
-   fn1( never end
-   fn1(invalid arg)
-   fn2() misses arg
-   fn2(a: 3) wrong kwarg
-   fn3(1 2) misses separator
-   fn3(1, 2, 3) wrong args number
-   fn3(1, b: 2) mixed arg and kwarg
-   fn4() fn5() not declared

Invalid calls and declarations generate and collects errors.