passerine 0.9.2

-- action: run
-- outcome: success
-- expect: false

syntax 'lazy y {
    Thunk { () -> y }
}
syntax 'evaluate y {
    Thunk x = y
    x ()
}

syntax 'if cond then 'else otherwise {
    branch = magic "if" (cond, lazy then, lazy otherwise)
    evaluate branch
}

syntax a 'equals b {
    magic "equal" (a, b)
}

not = n -> if n { false } else { true }

even = n -> if (n equals 0.0) {
    true
} else {
    odd (n - 1.0)
}

odd = n -> if (n equals 0.0) {
    false
} else {
    even (n - 1.0)
}

print even 35.0