fn add(a: i32, b: i32) i32 {
    ret a + b;
}

fn main() i32 {
    /* arithmetic */
    var a := 1 + 2 * 3;
    if a != 7 { ret 1; }

    var b := 10 - 4;
    if b != 6 { ret 2; }

    var c := 12 / 5;
    if c != 2 { ret 3; }

    var d := 12 % 5;
    if d != 2 { ret 4; }

    /* comparison */
    if (1 < 2) {} else { ret 5; }
    if (3 > 1) {} else { ret 6; }
    if (2 == 2) {} else { ret 7; }
    if (2 != 3) {} else { ret 8; }
    if (2 <= 2) {} else { ret 9; }
    if (3 >= 3) {} else { ret 10; }

    /* function call */
    var s := add(3, 4);
    if s != 7 { ret 11; }

    /* if/else */
    var x := 0;
    if x == 0 {
        x = 10;
    } else {
        x = 20;
    }
    if x != 10 { ret 12; }

    /* while */
    var i := 0;
    while i < 5 {
        i = i + 1;
    }
    if i != 5 { ret 13; }

    /* loop/break */
    var j := 0;
    loop {
        j = j + 1;
        if j >= 3 { break; }
    }
    if j != 3 { ret 14; }

    /* continue */
    var k := 0;
    var n := 0;
    while k < 5 {
        k = k + 1;
        if k == 3 { continue; }
        n = n + 1;
    }
    if k != 5 { ret 15; }
    if n != 4 { ret 16; }

    /* compound assignment */
    var y := 5;
    y += 3;
    if y != 8 { ret 17; }
    y -= 2;
    if y != 6 { ret 18; }
    y *= 2;
    if y != 12 { ret 19; }

    /* logical */
    if (true) {} else { ret 20; }
    if (false) { ret 21; }
    if (!false) {} else { ret 22; }

    /* bitwise */
    var m := 0xFF & 0x0F;
    if m != 0x0F { ret 23; }

    ret 0;
}