uniform half4 colorRed, colorGreen;
uniform half  unknownInput;

bool test() {
    int unknown = int(unknownInput);

    bool ok = true;
    int x = 32 + 2;
    ok = ok && (x == 34);
    x = 32 - 2;
    ok = ok && (x == 30);
    x = 32 * 2;
    ok = ok && (x == 64);
    x = 32 / 2;
    ok = ok && (x == 16);
    x = -1 == -1 ? 1 : -1;
    ok = ok && (x == 1);
    x = -1 == -2 ? 2 : -2;
    ok = ok && (x == -2);
    x = 0 != 1 ? 3 : -3;
    ok = ok && (x == 3);
    x = 0 != 0 ? 4 : -4;
    ok = ok && (x == -4);
    x = 6 > 5 ? 5 : -5;
    ok = ok && (x == 5);
    x = 6 > 6 ? 6 : -6;
    ok = ok && (x == -6);
    x = -1 < 0 ? 7 : -7;
    ok = ok && (x == 7);
    x = 1 < 0 ? 8 : -8;
    ok = ok && (x == -8);
    x = 6 >= 6 ? 9 : -9;
    ok = ok && (x == 9);
    x = 6 >= 7 ? 10 : -10;
    ok = ok && (x == -10);
    x = 6 <= 6 ? 11 : -11;
    ok = ok && (x == 11);
    x = 6 <= 5 ? 12 : -12;
    ok = ok && (x == -12);

    x = unknown + 0;
    ok = ok && (x == unknown);
    x = 0 + unknown;
    ok = ok && (x == unknown);
    x = unknown - 0;
    ok = ok && (x == unknown);
    x = unknown * 0;
    ok = ok && (x == 0);
    x = unknown * 1;
    ok = ok && (x == unknown);
    x = 1 * unknown;
    ok = ok && (x == unknown);
    x = 0 * unknown;
    ok = ok && (x == 0);
    x = unknown / 1;
    ok = ok && (x == unknown);
    x = 0 / unknown;
    ok = ok && (x == 0);
    x += 1;
    ok = ok && (x == 1);
    x += 0;
    ok = ok && (x == 1);
    x -= 2;
    ok = ok && (x == -1);
    x -= 0;
    ok = ok && (x == -1);
    x *= 1;
    ok = ok && (x == -1);
    x *= 2;
    ok = ok && (x == -2);
    x /= 1;
    ok = ok && (x == -2);
    x /= 2;
    ok = ok && (x == -1);
    return ok;
}

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