to_trait/
lib.rs

1use std::convert::TryInto;
2
3/// Provides methods similar to `.into()` and `.try_into()`,
4/// except they take type arguments. See each method's documentation
5/// for details.
6///
7pub trait To {
8    /// A version of `std::convert::Into::into` that lets you provide
9    /// type arguments to the method call.
10    ///
11    /// ```
12    /// use to_trait::To;
13    /// assert_eq!(5i32, 5u8.to::<i32>());
14    /// ```
15    fn to<T>(self) -> T
16    where
17        Self: Into<T>,
18    {
19        self.into()
20    }
21
22    /// a version of `std::convert::TryInto::try_into` that lets you provide type arguments
23    /// to the method call.
24    ///
25    /// ```
26    /// use to_trait::To;
27    /// assert_eq!(255u32.try_to::<u8>(), Ok(255u8));
28    /// assert!(256u32.try_to::<u8>().is_err());
29    /// ```
30    fn try_to<T>(self) -> Result<T, <Self as TryInto<T>>::Error>
31    where
32        Self: TryInto<T>,
33    {
34        self.try_into()
35    }
36}
37
38impl<T> To for T {}
39
40#[test]
41fn test_it() {
42    assert_eq!(42u32.to::<u64>(), 42u64);
43    assert_eq!(42u32.try_to::<u8>(), Ok(42u8));
44    assert!(500.try_to::<u8>().is_err());
45}
to_trait/lib.rs

to_trait/
lib.rs
