resources/sksl/shared/TernarySideEffects.sksl

uniform half4 colorGreen, colorRed;

half4 main(float2 coords) {
    // Verify that side effects in the not-taken side of a ternary do not occur.
    half x = 1, y = 1;
    (x == y) ? (x += 1) : (y += 1);  // TRUE,   x=2 y=1
    (x == y) ? (x += 3) : (y += 3);  // FALSE,  x=2 y=4
    (x <  y) ? (x += 5) : (y += 5);  // TRUE,   x=7 y=4
    (y >= x) ? (x += 9) : (y += 9);  // FALSE,  x=7 y=13
    (x != y) ? (x += 1) : (y     );  // TRUE,   x=8 y=13
    (x == y) ? (x += 2) : (y     );  // FALSE,  x=8 y=13
    (x != y) ? (x     ) : (y += 3);  // TRUE,   x=8 y=13
    (x == y) ? (x     ) : (y += 4);  // FALSE,  x=8 y=17

    // Verify that side effects in the test-condition of a ternary always occur before the if-true
    // and if-false expressions are evaluated.
    bool b = true;
    bool c = (b = false) ? false : b;

    return c ? colorRed : (x == 8 && y == 17) ? colorGreen : colorRed;
}