slint/sixtyfps_compiler/tests/syntax/basic/arithmetic_op.60

SuperSimple := Rectangle {
    property<duration> p1: 3s + 1ms;
    property<int> p2: 3s + 1;
//                        ^error{Cannot convert float to duration}
    property<int> p3: 3s - 1;
//                        ^error{Cannot convert float to duration}
    property<int> p4: 3 / 1ms;
//                       ^error{Cannot convert duration to float}

    property<duration> p5: 3ms * 1;
    property<duration> p6: 3ms * 1s;
//                         ^error{Cannot convert duration to float}

    property<int> p7: "hello" * 1;
//                    ^error{Cannot convert string to float}

    property<int> p8: 1 + "hello" + 1;
//                       ^error{Cannot convert string to float}


}