tuple_unwrap/
lib.rs

1pub trait TupleUnwrap<T> {
2    fn tuple_into(self) -> T;
3}
4
5impl<T> TupleUnwrap<T> for T {
6    fn tuple_into(self) -> T {
7        self
8    }
9}
10
11
12impl<T> TupleUnwrap<T> for (T,) {
13    fn tuple_into(self) -> T {
14        self.0
15    }
16}
17
18#[cfg(test)]
19mod tests {
20    use super::*;
21
22    #[test]
23    fn identity_impl() {
24        let x = 42;
25        let y = 42;
26        let s = "Hello!";
27
28        let _x: i32 = x.tuple_into();
29        let _y: u32 = y.tuple_into();
30        let _s = s.tuple_into();
31    }
32
33    #[test]
34    fn tuple_impl() {
35        let x = (42,);
36        let y = (42,);
37        let s = ("Hello!",);
38
39        let _x: i32 = x.tuple_into();
40        let _y: u32 = y.tuple_into();
41        let _s: &str = s.tuple_into();
42    }
43}
tuple_unwrap/lib.rs

tuple_unwrap/
lib.rs
