slint/internal/compiler/tests/syntax/lookup/conversion.slint

// Copyright © SixtyFPS GmbH <info@slint.dev>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0

global Glob := {
    property <physical_length> len: 45px * 5;
//                                  ^error{Cannot convert between logical and physical length in a global component, because the scale factor is not known}
    property <length> logic_len: 45phx * 5;
//                               ^error{Cannot convert between logical and physical length in a global component, because the scale factor is not known}
    property <float> ratio: allowed / 1phx;
//                          ^error{Cannot convert between logical and physical length in a global component, because the scale factor is not known}
    property <length> converted_rem: 2rem;
//                                   ^error{Cannot convert between rem and logical length in a global component, because the default font size is not known}
    property <float> should_work: 45px / 8px + (4rem / 2rem);
    property <length> allowed: 45px * 5;
    property <relative-font-size> rem_allowed: 42rem;
}

export X := Rectangle {

    t := Text {
        x: "hello";
//         ^error{Cannot convert string to length$}
        text: 45;
    }

    Text {
        x: t.text;
//         ^error{Cannot convert string to length$}
        y: 42;
//         ^error{Cannot convert float to length. Use an unit, or multiply by 1px to convert explicitly}
        text: x;
//            ^error{Cannot convert length to string. Divide by 1px to convert to a plain number}
        property<int> foo: y;
//                         ^error{Cannot convert length to int. Divide by 1px to convert to a plain number}
        property<duration> bar: foo;
//                              ^error{Cannot convert int to duration. Use an unit, or multiply by 1ms to convert explicitly}
    }

    Rectangle {
        background: "blue";
//                  ^error{Cannot convert string to brush$}
        property<length> no_matching_parent: 50%;
//                                           ^error{Automatic conversion from percentage to length is only possible for the following properties: width, height, preferred-width, preferred-height}
    }

    property <{a: string, b: int}> object1: { a: "123", typo: 42};
//                                          ^error{Cannot convert \{ a: string,typo: float,\} to \{ a: string,b: int,\}}

    property <[{a: [int]}]> ccc: [{a: []}, {}, {a: ["123"]}, {a: [123]}];
//                               ^error{Cannot convert string to int}  (FIXME: error location)
//                               ^^error{Cannot convert string to int}  (FIXME: duplicated)

    property <int> arr1: [];
//                       ^error{Cannot convert \[void\] to int}

    property <{a: int}> arr2: {a: []};
    //                        ^error{Cannot convert \[void\] to int}

    property <int> arr3: false ? [] : 45;  //(FIXME: error not ideal)
//                                    ^error{Cannot convert float to \[void\]}
//                       ^^error{Cannot convert void to int}

    property <int> to-float: "foobar".to-float;
//                                    ^error{Member function must be called}
//                           ^^error{Cannot convert function\(string\) -> float to int}
}