Function gjs_define_error_properties

gi/gerror.cpp:274–304

define properties that JS Error exposes, such as fileName, lineNumber and stack

// define properties that JS Error exposes, such as fileName, lineNumber and
// stack
GJS_JSAPI_RETURN_CONVENTION
bool gjs_define_error_properties(JSContext* cx, JS::HandleObject obj) {
    JS::RootedObject frame(cx);
    JS::RootedString stack(cx);
    JS::RootedString source(cx);
    uint32_t line;
    JS::TaggedColumnNumberOneOrigin tagged_column;

    if (!JS::CaptureCurrentStack(cx, &frame) ||
        !JS::BuildStackString(cx, nullptr, frame, &stack))
        return false;

    auto ok = JS::SavedFrameResult::Ok;
    if (JS::GetSavedFrameSource(cx, nullptr, frame, &source) != ok ||
        JS::GetSavedFrameLine(cx, nullptr, frame, &line) != ok ||
        JS::GetSavedFrameColumn(cx, nullptr, frame, &tagged_column) != ok) {
        gjs_throw(cx, "Error getting saved frame information");
        return false;
    }

    const GjsAtoms& atoms = GjsContextPrivate::atoms(cx);
    return JS_DefinePropertyById(cx, obj, atoms.stack(), stack,
                                 JSPROP_ENUMERATE) &&
           JS_DefinePropertyById(cx, obj, atoms.file_name(), source,
                                 JSPROP_ENUMERATE) &&
           JS_DefinePropertyById(cx, obj, atoms.line_number(), line,
                                 JSPROP_ENUMERATE) &&
           JS_DefinePropertyById(cx, obj, atoms.column_number(),
                                 tagged_column.oneOriginValue(),
                                 JSPROP_ENUMERATE);
}

[[nodiscard]]
static JSProtoKey proto_key_from_error_enum(int val) {