# Milestone 5 foundation: booleans, comparisons, logical ops, if/else if/else.

printf c_func(format *c_char, ...) c_int

# Returns a distinct code per range using if / else if / else and comparisons.
classify func(n i32) i32 {
	if n < 0 {
		return 1
	} else if n == 0 {
		return 2
	} else if n >= 100 {
		return 3
	} else {
		return 4
	}
}

# A bool-returning function with a visible side effect, used to prove
# short-circuit evaluation: it must only print when actually evaluated.
noisy func() bool {
	_ = printf("rhs-evaluated\n")
	return true
}

main func() i32 {
	total i32 := 0

	# comparisons drive if / else if / else
	total = total + classify(-5)   # 1
	total = total + classify(0)    # 2
	total = total + classify(250)  # 3
	total = total + classify(42)   # 4  -> 10

	# bool variables and logical and / or / not
	a :: true
	b :: false
	if a and !b {
		total = total + 10         # 20
	}
	if b or a {
		total = total + 10         # 30
	}
	if !(a and b) {
		total = total + 5          # 35
	}

	# block scoping: inner bindings do not escape the block
	x i32 := 1
	if x == 1 {
		inner_x i32 := 100
		if inner_x == 100 {
			total = total + 5      # 40
		}
	}
	if x == 1 {
		total = total + 2          # 42
	}

	# short-circuit: `false and noisy()` must NOT call noisy()
	if false and noisy() {
		_ = printf("unreachable-and\n")
	}
	# short-circuit: `true or noisy()` must NOT call noisy()
	if true or noisy() {
		_ = printf("or-taken\n")
	}

	return total                   # expect exit code 42
}