1uniform half4 colorGreen, colorRed;
2
3half4 main(float2 coords) {
4    const bool TRUE = true;
5    const bool FALSE = false;
6
7    bool ok = true;
8
9    // Literal test
10    ok = ok && (true ? true : false);
11    ok = ok && (false ? false : true);
12
13    // Constant boolean test
14    ok = ok && (TRUE ? true : false);
15    ok = ok && (FALSE ? false : true);
16
17    // Constant-foldable test
18    ok = ok && (1 == 1 ? true : false);
19    ok = ok && (0 == 1 ? false : true);
20
21    // Unknown-value test
22    ok = ok && (colorGreen.g == 1 ? true : false);
23    ok = ok && (colorGreen.r == 1 ? false : true);
24
25    return ok ? colorGreen : colorRed;
26}
27