uniform half4 colorGreen, colorRed;

half4 main(float2 c) {
    bool ok = true;

    // Postfix ++ and -- (scalar int).
    int i = 5;
    i++;
    ok = ok && (i++ == 6);
    ok = ok && (i == 7);
    ok = ok && (i-- == 7);
    ok = ok && (i == 6);
    i--;
    ok = ok && (i == 5);

    // Postfix ++ and -- (scalar float).
    float f = 0.5;
    f++;
    ok = ok && (f++ == 1.5);
    ok = ok && (f == 2.5);
    ok = ok && (f-- == 2.5);
    ok = ok && (f == 1.5);
    f--;
    ok = ok && (f == 0.5);

    // Postfix ++ and -- (vector-component float).
    float2 f2 = float2(0.5);
    f2.x++;
    ok = ok && (f2.x++ == 1.5);
    ok = ok && (f2.x == 2.5);
    ok = ok && (f2.x-- == 2.5);
    ok = ok && (f2.x == 1.5);
    f2.x--;
    ok = ok && (f2.x == 0.5);

    // Postfix ++ and -- (vector float).
    f2++;
    ok = ok && (f2++ == float2(1.5));
    ok = ok && (f2 == float2(2.5));
    ok = ok && (f2-- == float2(2.5));
    ok = ok && (f2 == float2(1.5));
    f2--;
    ok = ok && (f2 == float2(0.5));

    // Postfix ++ and -- (vector int).
    int4 i4 = int4(7, 8, 9, 10);
    i4++;
    ok = ok && (i4++ == int4(8, 9, 10, 11));
    ok = ok && (i4 == int4(9, 10, 11, 12));
    ok = ok && (i4-- == int4(9, 10, 11, 12));
    ok = ok && (i4 == int4(8, 9, 10, 11));
    i4--;
    ok = ok && (i4 == int4(7, 8, 9, 10));

    // Postfix ++ and -- (matrix).
    float3x3 m3x3 = float3x3(1, 2, 3, 4, 5, 6, 7, 8, 9);
    m3x3++;
    ok = ok && (m3x3++ == float3x3(2, 3, 4, 5, 6, 7, 8, 9, 10));
    ok = ok && (m3x3 == float3x3(3, 4, 5, 6, 7, 8, 9, 10, 11));
    ok = ok && (m3x3-- == float3x3(3, 4, 5, 6, 7, 8, 9, 10, 11));
    ok = ok && (m3x3 == float3x3(2, 3, 4, 5, 6, 7, 8, 9, 10));
    m3x3--;
    ok = ok && (m3x3 == float3x3(1, 2, 3, 4, 5, 6, 7, 8, 9));

    return ok ? colorGreen : colorRed;
}