float f = 1.0;
int   i = 1;
uint  u = 1;
bool  b = true;

void main() {
    float f1 = float(f);
    float f2 = float(i);
    float f3 = float(u);
    float f4 = float(b);
    int   i1 = int(f);
    int   i2 = int(i);
    int   i3 = int(u);
    int   i4 = int(b);
    uint  u1 = uint(f);
    uint  u2 = uint(i);
    uint  u3 = uint(u);
    uint  u4 = uint(b);
    bool  b1 = bool(f);
    bool  b2 = bool(i);
    bool  b3 = bool(u);
    bool  b4 = bool(b);

    sk_FragColor.x = half(f1 + f2 + f3 + f4);
    sk_FragColor.x = half(i1 + i2 + i3 + i4);
    sk_FragColor.x = half(u1 + u2 + u3 + u4);
    sk_FragColor.x = half(b1 || b2 || b3 || b4);
}