uniform half4 colorRed, colorGreen;

bool test() {
    bool a = 1 == 1 || 2 == 8;
    bool b = 1 > 1  || 2 == 8;
    bool c = 1 == 1 && 2 <= 8;
    bool d = 1 == 2 && 2 == 8;
    bool e = 1 == 1 ^^ 1 != 1;
    bool f = 1 == 1 ^^ 1 == 1;
    bool g = true == true;
    bool h = false == true;
    bool i = true == !false;
    bool j = false == !false;

    const bool TRUE = true;
    const bool FALSE = false;
    bool k = all(bool4(1 == 1, !false, 123 > 12, TRUE));  // all are true
    bool l = all(bool3(TRUE, 1 == 2, true));              // three out of four are true
    bool m = any(bool4(true, 1 == 2, true, TRUE));        // three out of four are true
    bool n = any(bool2(0 == 1, FALSE));                   // none are true

    return a && !b && c && !d && e && !f && g && !h && i && !j && k && !l && m && !n;
}

half4 main(float2 coords) {
    return test() ? colorGreen : colorRed;
}