react/
into_prop_value.rs

1pub trait IntoPropValue<R> {
2    fn into_prop_value(self) -> R;
3}
4
5impl<R> IntoPropValue<Option<R>> for R {
6    fn into_prop_value(self) -> Option<R> {
7        Some(self)
8    }
9}
10
11impl<R> IntoPropValue<R> for R {
12    fn into_prop_value(self) -> R {
13        self
14    }
15}
16
17#[cfg(test)]
18mod tests {
19    use super::IntoPropValue;
20
21    #[test]
22    fn simple() {
23        let _: i32 = IntoPropValue::into_prop_value(0i32);
24        let _: Option<i32> = IntoPropValue::into_prop_value(0i32);
25        let _: Option<i32> = IntoPropValue::into_prop_value(Some(0i32));
26        let _: Option<i32> = IntoPropValue::into_prop_value(None);
27    }
28
29    #[test]
30    fn impl_for_custom_type() {
31        struct MyNum(f64);
32
33        impl IntoPropValue<MyNum> for f64 {
34            fn into_prop_value(self) -> MyNum {
35                MyNum(self)
36            }
37        }
38
39        let _: MyNum = IntoPropValue::into_prop_value(0.0);
40    }
41
42    #[test]
43    fn with_trait() {
44        struct MyNum(i32);
45
46        impl IntoPropValue<i32> for MyNum {
47            fn into_prop_value(self) -> i32 {
48                self.0
49            }
50        }
51
52        fn display<D: std::fmt::Display>(v: D) -> String {
53            v.to_string()
54        }
55
56        assert_eq!(display::<i32>(IntoPropValue::into_prop_value(1)), "1");
57        assert_eq!(display::<&str>(IntoPropValue::into_prop_value("2")), "2");
58        assert_eq!(
59            display::<i32>(IntoPropValue::into_prop_value(MyNum(3))),
60            "3"
61        );
62    }
63
64    #[test]
65    fn with_option_trait() {
66        fn display<D: std::fmt::Display>(v: Option<D>) -> String {
67            v.as_ref()
68                .map_or_else(|| String::new(), ToString::to_string)
69        }
70
71        assert_eq!(display(IntoPropValue::into_prop_value(1)), "1");
72        assert_eq!(display(IntoPropValue::into_prop_value("2")), "2");
73        assert_eq!(display::<f64>(IntoPropValue::into_prop_value(None)), "");
74    }
75}
react/into_prop_value.rs

react/
into_prop_value.rs
