module main

const min = 1
const max = 3

fn t() f64 {
    return 1.23
}

fn z() ?f64 {
    return 1.22
}

fn r() int {
    return 5
}

fn test_main() {
    y := 4

    assert y in 1..20
    assert y !in 5..20
    assert y in 4..20
    assert y !in min..max

    assert (t() !in 1..3) == false
    assert r() in 5..6
    assert r() in 4..6
    assert 1.22 in z()?..t()
    assert 1.23 !in z()?..t()
    assert 1.221 in z()?..t()

    a := {
        'f': 2
    }
    assert a['f'] in 1..3
    assert a['f'] in 2..3
    assert a['f'] !in 0..2
    assert a['f'] in min..max
}

fn test_rune() {
    assert `a` in `a`..`h`
    assert `h` !in `a`..`h`

    assert `f` in `a`..`h`
    assert `f` !in `g`..`h`
}