fn test_can_convert()

in gazebo/src/any.rs [249:270]

• 18 lines of code
• 1 McCabe index (conditional complexity)

    fn test_can_convert() {
        #[derive(Debug, PartialEq, AnyLifetime)]
        struct Value<'a>(&'a str);

        #[derive(AnyLifetime)]
        struct Value2<'a>(&'a str);

        // Changing the return type too `Value<'static>` causes a compile error.
        fn convert_value<'a>(x: &'a Value<'a>) -> Option<&'a Value<'a>> {
            <dyn AnyLifetime>::downcast_ref(x)
        }

        fn convert_any<'p, 'a>(x: &'p dyn AnyLifetime<'a>) -> Option<&'p Value<'a>> {
            x.downcast_ref()
        }

        let v = Value("test");
        let v2 = Value2("test");
        assert_eq!(convert_value(&v), Some(&v));
        assert_eq!(convert_any(&v), Some(&v));
        assert_eq!(convert_any(&v2), None);
    }